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Color Service Vol. 3 - William Bald computer service and support

1. Cause Issue Solution Density Is the density sensor soiled Clean the density sensor with sensor the special brush located near light the sensor emitting receiving section ENWW Troubleshooting control panel messages 159 Table 2 22 Cause and solutions for E020 error continued E021 CLJ 8550mfp This error occurs when the developing rotary position sensor PS3 does not detect the rotation position flag even when the developing rotary motor has rotated for a specific time This error can also occur when the PS3 detects a faulty or wrong rotation flag width Note Connector Are connector J1101 on the density Connect the connectors density detection PCB relay connectors J75 securely detection and J46 and connector J206 on the dc PCB controller PCB connected securely Density Is the voltage 24 V between connectors Replace the density detection detection J206 5 24 UH on the density PCB PCB detection PCB and GND when the Replace the dc controller PCB copier is turned on On rare occasions a broken carousel gear or broken position flag on the carousel gear can cause this error The CLJ 8500 8550 8550mfp carousel assembly cannot be replaced Table 2 23 Cause and solutions for E021 error Cause Issue Solution Print Is the shutter of each print cartridge Replace the print cartridge cartridge open properly when in its proper whose shutter
2. Cause Issue Solution Connector Are connector J1001 on the laser Connect the connectors laser driver driver PCB and connector J205 on the securely signal line dc controller PCB connected securely Connectors Are connector J2 on the BD PCB relay Connect the connectors BD line connector J40 and connector J211 on securely the dc controller PCB connected securely Laser Is the voltage between connectors Replace the laser scanner unit scanner unit J211 1 5 V on the dc controller PCB Replace the dc controller PCB and J211 3 GND 5 V immediately after the copier is turned on ENWW Troubleshooting control panel messages 165 E110 CLJ 8550mfp This error occurs when the scanner motor fails to reach a specific revolution within 10 seconds after it has started to rotate This error can also occur when the BC PCB detects an error within 2 5 seconds after the scanner motor has started to rotate Table 2 29 Cause and solutions for E110 errors Cause Issue Solution Connector Are connector J901 on the laser Connect the connectors securely scanner motor PC relay connector J40 and connector J211 on the dc controller PCB connected securely Laser Does the voltage between Replace the laser scanner motor scanner connectors J211 7 SCND on the dc Replace the dc controller PCB motor controller PCB and J211 6 GND change from 0 to 17 V or more when the copier is turned on E196 E197 E1
3. 56 mm 2 2 inches Cleaning roller 52 mm 1 9 inches Black developer roller 65 mm 2 6 inches Developer DSD wheels 66 mm 2 7 inches Transfer roller 105 5 mm 6 0 inches Fuser 195 mm 7 8 inches Image drum 222 mm 8 9 inches Transfer belt ENWW Repetitive defects troubleshooting 253 254 Chapter 4 Print quality ENWW 5 Illustrations Contents Major components Power on sequences ENWW 255 Major components CLJ 2500 major components Figure 5 1 CLJ 2500 assembly locations without optional trays Reference CLJ 2500 component Reference CLJ 2500 component 1 Power base assembly 5 Front frame assembly 2 Fuser assembly 6 Rotary drive assembly 3 Middle frame assembly 7 Main drive assembly 4 Rear frame assembly 8 Rotary carousel assembly 256 Chapter 5 Illustrations ENWW Figure 5 2 CLJ 2500 photosensors and switches Reference CLJ 2500 component 1 Tray 1 sensor Roller engaging sensor Developing rotary engaging sensor Fuser delivery sensor Front fuser detection sensor Door open detection switch Nf OO o amp R OJN Power switch ENWW Major components 257 Figure 5 3 CLJ 2500 motors and fans Reference CLJ 2500 component Reference CLJ 2500 component 1 Engaging motor 4 Fuser motor Developing rotary motor 5 Main motor Toner cartridge
4. CLJ 4600 CLJ 5500 A non volatile storage device is full Pressing the SELECT button should clear the message Printing can continue but you might experience unexpected behavior X Description 0 onboard NVRAM 1 removable disk flash or hard 1 Press SELECT to continue 2 For 68 0 errors turn the printer off and then on 3 If a 68 0 error persists execute an NVRAM initialization 4 For 68 1 errors use the HP Web Jetadmin software to delete files from the disk drive 5 If a 68 1 error persists reinitialize the hard disk ENWW Troubleshooting control panel messages 151 Table 2 14 Numerical error messages continued Message Description Action Li i F D CLJ 4600 CLJ 5500 A non volatile storage device is failing to write Pressing the SELECT button should clear the message Printing can continue but you might experience unexpected behavior X Description 0 onboard NVRAM 1 removable disk flash or hard 1 Press SELECT to continue 2 Turn the printer off and then on 3 If the problem persists initialize NVRAM 4 Reinitialize the hard disk CLJ 4500 4550 CLJ 4600 CLJ 5500 A hardware error has occurred X Description 01XX IO ASIC register error 02XX video ASIC register error 03XX IDE ASIC register error CLJ 4500 4550 1 Tum the printer off and then on 2 If the problem persists reseat the firmware DIMM Re
5. Pad FRM FAILL 6 Measure the voltage CLJ 8500 8550 across connector J641 1 continued 24 VB and J641 4 GND on the main relay PCA after the printer is turned on If the voltage is not 24 V replace the main relay PCA 7 Check the ac power supply 8 If the problem is not corrected after the printer is turned off and on again find the cause of activation of the overcurrent overvoltage detection circuit in the power supply Wait more than two minutes before turning the power on again 9 Ifthe error persists replace the power supply ENWW Troubleshooting control panel messages 127 Table 2 14 Numerical error messages continued Message Description Action CLJ 4500 4550 The printer detected that the fan an exhaust fan located in the upper right rear corner of the printer is not rotating This fan operates off 24 Vdc and is enabled by the DC controller PCB micro processor 1 Turn the printer off and on to reset the printer Visually check to see if the fan is rotating if you cannot see any rotation place your hand over the outlet vents to feel whether exhaust air is moving Remove the printer s left side cover Check to see if anything is preventing the fan from rotating freely Verify that the fan s connector is firmly seated into connector J208 of the developing PCB If the error persists replace the fan 128 Chapter 2 S
6. Press DOWN ARROW to highlight Press SELECT to select Press DOWN ARROW to highlight 5 Press SELECT to select The message F appears on the display until the printer niehes printing the configuration page The printer returns to the state after printing the configuration page Note If the printer is configured with ElO cards for example an HP Jetdirect Print Server or an optional hard disk drive an additional configuration page will print that provides information ENWW Printing information pages 27 Table 2 4 Printing a configuration page Product Instructions CLJ 8500 CLJ 8550 1 Press MENU until I iappears on the printer control panel display 2 Press ITEM until appears on the display 3 Press SELECT to print the page To print a continuous configuration page 1 Press MENU until Z appears on the printer control panel display 2 Press ITEM until appears on the display 3 Press SELECT to print the page Note Press CANCEL JOB to stop printing The printer will print all of the pages in the buffer before stopping Demonstration page Use this page to simulate printing a color image If the image print quality is poor print a demonstration page to make sure that the problem is not related to software communications or file quality To print a demonstration page Table 2 5 Printing a demonstration page Product Instructions Press GO when the printer is Rea
7. The EIO disk in slot X is not working correctly Remove the EIO disk from the slot indicated and replace it with a new EIO disk drive An EIO accessory is initializing lt n gt EIO slot number 1 Bottom EIO slot 2 Top EIO slot No action is required CLJ 8500 8550 An ElO card error exists but printing can continue The configuration page will indicate that EIO lt n gt is not supported lt n gt EIO slot number 1 Bottom EIO slot 2 Top EIO slot 1 Turn the printer off and on to reset the printer 2 Replace the offending EIO accessory alternates with The EIO device in slot X is initializing The YYY value increments every 10 seconds during this process No action is required ENWW Troubleshooting control panel messages 71 Table 2 13 Alphabetical printer messages continued Message CLJ 4500 4550 Description The EIO slot specified does not have a card installed or is not functional Action No action is required The printer is running an internal test to verify operation When the printer is finished the printer returns to the ready state but remains offline Press Go to bring the printer online The top output bin on the multi bin mailbox is full 1 Remove all media from the top output bin in the multi bin mailbox to continue printing 2 Check the functionality of the Bin Full flag a
8. The imaging drum is past its specified life or the waste toner cartridge in the imaging drum is full Printing cannot continue until the drum kit has been replaced Replace the drum kit 2 Remove the drum cartridge from the printer and clean the waste toner sensor window with a dry cloth 3 Reconnect connector J221 on the controller board and connectors J631 to J633 and relay connector J71 on the waste toner sensor 4 Reconnect connector J209 and relay connectors J47 and J48 on the controller board 5 Replace the drum cartridge 6 Replace the waste toner sensor CLJ 4500 4550 An error has occurred in the duplexer a Verify that the duplexer is correctly installed 2 Verify that the small power cord from the duplexer is plugged into the printer and the power cord from the AC outlet is plugged into the duplexer 70 Chapter 2 Service and troubleshooting ENWW Table 2 13 Alphabetical printer messages continued Message Description Action CLJ 8500 8550 The printer has detected an error in the duplexer 1 Open the left lower cover press the green tab on the right side of the duplexer and pull the duplexer out of the printer Check for and remove any jammed media from the duplexer Reinstall the duplexer 2 Turn the printer off and on to reset the printer 3 If the message persists replace the duplexer CLJ 4600 5500
9. 2 Turn the printer off and on to reset the printer 3 If the error persists replace the multi bin mailbox controller board PCA CLJ 8500 8550 A multi bin mailbox error exists XX error code from the optional device aa Verify that the C link and power cables are connected 2 Turn the printer off and on to reset the printer 3 If the error persists replace the C link cables 4 If the error persists replace the multi bin mailbox controller board PCA ENWW Troubleshooting control panel messages 149 Table 2 14 Numerical error messages continued Message Description Action Indicates an electronic controller error exists 1 Turn the printer off and on to reset the printer CLJ 8500 8550 ERA 2 If the error persists X Description replace the controller 1 controller board error board 2 controller board IC i malfunction 3 internal communication malfunction One or more settings saved 1 Check the printer settings in the non volatile storage to determine which CLJ 4500 4550 device are invalid Some values have been settings might have been changed reset to factory defaults 2 Clear the message by pressing Go One or more settings saved 1 Check the printer control in the non volatile storage panel settings One or CLJ 8500 8550 device are invalid Some more fields have been settings might have been reset to their factory res
10. ENWW Troubleshooting control panel messages 85 Table 2 13 Alphabetical printer messages continued Message Description Action The top output bin holds 250 sheets of paper Sensor PS9 along with its sensor flag detects the height of the output paper stack Perform the action items if this message appears when no paper is in the output bin 1 Verify that the PS9 sensor flag and arm move freely 2 Verify PS9 is free of dust and debris top assembly cover must be removed to access sensor 3 Verify all connectors are firmly seated Refer to the wiring diagram Note PS9 a three wire sensor plugs into a through wall connector on the printer s chassis and then into a 14 pin wire harness which plugs into J206 on the developing PCB All signals from the developing PCB are routed to J201 on the developing PCB to J1017 on the DC controller PCB CLJ 8500 8550 The printer is resetting the printer s factory defaults The printer is in the process of completing a cold reset When the reset is completed the printer returns to the ready state but remains offline Reset the EIO type and configure the printer before bringing the printer online For more information about factory defaults and configuring the printer control panel see the service manual The language selection power up key sequence has been entered The printer will prompt the user to select a new di
11. Reference CLJ 8500 855 Reference CLJ 8500 8550 component component PS1 Registration roller paper PS1206 Tray 2 paper level sensor 1 sensor PS3 Carousel position sensor PS1207 Tray 3 paper out sensor PS5 Separation sensor PS1208 Tray 2 paper out sensor PS10 Top face down output bin PS1301 Tray 1 paper sensor paper full sensor ENWW Major components 279 Reference CLJ 8500 855 Reference CLJ 8500 8550 component component delivery sensor PS17 Pick up unit paper sensor 8 PS1801 OHT sensor 1 PS18 Pick up unit cover sensor PS1802 OHT sensor 2 PS19 Tray 1 last page sensor PS1901C Color toner cartridge sensor PS29 Tray 2 last page sensor PS1902 Color toner lever sensor PS30 Left cover sensor PS1903 Fusing delivery sensor PS1201 Tray 3 sensor THU Upper thermistor PS1202 Tray 2 sensor THL Lower thermistor PS1203 Tray 3 paper level sensor TPU Upper thermo switch 2 PS1204 Tray 3 paper level sensor 1 TPL Lower thermo switch PS1205 Tray 2 paper level sensor 2 280 Chapter 5 Illustrations ENWW Figure 5 25 CLJ 8500 8550 printer motors and heaters Reference CLJ 8500 855 Reference CLJ 8500 855 component component M1 Carousel motor FM1 Fan 1 motor M2 Drum motor FM2 Fan 2 motor M3 Cartridge motor FM3 Fan 3 motor M4 Main motor HU Upper fuser heater M5 Pick up motor HL Lower fuser heater ENWW Major components 281 9 HI
12. Registration shutter is defective This applies to jams that occur before the registration roller Make sure the shutter is clean moves smoothly and that the spring is in place If the shutter is damaged replace the paper pickup assembly Drive gears are damaged This applies to jams that occur before the registration roller Check the drive gears in the paper pickup unit Replace the pickup drive assembly if the gears are damaged 234 Chapter 3 Jams ENWW Table 3 9 Causes for jams in the paper path CLJ 4600 5500 continued Issue Solution Registration roller and registration sub roller are dirty worn or damaged This applies to jams that occur before the registration roller Clean the registration roller or registration sub roller if it is dirty If it is still dirty after cleaning or if it is worn or damaged replace the paper pickup assembly Attaching roller is damaged This applies to jams in which paper is crumpled into an accordion as it enters the ETB Cartridge shutter open close mechanism is damaged This applies to jams in which paper is crumpled into an accordion fold somewhere on the ETB belt Cartridge drive motor assembly is damaged Check if the attaching roller is damaged If it is damaged replace the ETB Calibrate the printer after replacing the ETB The shutters in each print cartridge should open as you close the ETB If a shutter d
13. Table 2 49 Cause and solutions for E813 error Cause Checks Action Fusing Is the fusing assembly set in the Set the fusing assembly properly assembly printer properly and turn the power off and then on Connector Is connector J26 of the fusing Connect the connector securely fusing assembly connected securely assembly Connector Is connector J222 on the dc Connect the connector de controller controller PCB connected securely Replace the dc controller PCB PCB E814 CLJ 8550mfp A specific number of copies have been counted after the photosensitive drum end of life warning has been issued Table 2 50 Cause and solutions for E814 error Cause Checks Action Drum Replace the drum cartridge Is the End cartridge problem corrected Replace the dc controller PCB E903 CLJ 8550mfp The error shown on the touch screen display is in the side HCI See the CLJ 8550 mfp service manual This error indicates one of three problems 1 An error has been detected in the paper deck lifter motor 2 The lifter upward movement takes longer than the specified time 3 The paper level change time is in excess of a specific value while the lifter is moving up E999 CLJ 8550mfp A timing problem has occurred with the copy module Power cycle the unit to alleviate the problem 182 Chapter 2 Service and troubleshooting ENWW Service mode functions Service mode allows for th
14. e The blue toner lever is locked e The clear door is closed e The imaging drum is installed e The black print cartridge is installed completely including removing the orange seal from the black print cartridge and swinging the upper blue lever to the left e The right upper door is closed 2 Turn the printer off and on to reset the printer 3 If the cartridge is installed correctly check that the sensor PS1901C is functioning correctly If necessary replace the sensor 4 Clean the sensor with a toner wipe 74 Chapter 2 Service and troubleshooting ENWW Table 2 13 Alphabetical printer messages continued Message Description Action CLJ 8500 8550 continued 5 Reconnect connector J221 on the controller board and reconnect connector J621 and relay connector J70 on the remaining color toner sensor Make sure that the black print cartridge is installed If cartridge is installed turn the printer off reinstall the cartridge and then turn the printer on Reconnect connectors J641 and J644 on the main relay PCA and connector J102 on the power supply Reconnect connector J227 on the controller board and connector J647 on the main relay PCA Check electrical continuity between connector J644 1 PBK and J644 2 PMP when the door switch SW644 is turned on If no electrical continuity exists replace the black print cartridge o
15. 1 Open a Web browser 2 Inthe Address or Go to field type the IP address assigned to the product for example http 192 168 1 1 or the host name for example http myproduct If you do not know the IP address for the product it is listed on the Configuration page Obtaining service notes To gain access to service notes 1 Open a web browser such as Internet Explorer or Netscape Navigator 2 Type http partner americas hp com in the Address or Go box and then press Enter Under enter site click hp partner web Type your user name and password Click support Under technical support information click technical support website Click the product type such as laserjet or laserjet color oN O UA fF O Select the product that you want from the list ENWW Embedded web server 289 Service websites HP Customer Care Online Go to the following website for information about software drivers support documentation and frequently asked questions http www hp com go support HP learning center The learning center make web based training modules available to HP partners To open an account and access the learning center go to the following websites e Direction for opening an account htpp vsslfpro zcce compaq plm contact index html e Log in page http vsslfpro compaq plm Parts The following website allows you to search for HP product parts using the HP product name or model number part
16. 53 x1 zz Printer DIMM Slot 1 error A problem exists with the DIMM in D DIMM slot 1 Oo CAUTION You must turn off the printer before inserting or removing 3 DIMMs to avoid damaging them 1 Remove the DIMM and reinstall it to make sure that it is correctly installed Make sure that you are using a supported DIMM See chapter 7 for ordering information Move the DIMM to a different DIMM slot If the DIMM works in a different slot then DIMM slot 1 is malfunctioning Many of the first printers of this model were shipped with an 8 MB flash DIMM in DIMM slot 1 If the printer has an 8 MB flash DIMM in DIMM slot 1 then replace the DIMM The 8 MB flash DIMM will not work in any DIMM slot other than DIMM slot 1 To continue printing remove the DIMM from DIMM slot 1 53 x2 zz Printer DIMM Slot 2 error A problem exists with the DIMM in NO DIMM slot 2 CAUTION You must turn off the printer before inserting or removing 3 DIMMs to avoid damaging them Remove the DIMM and reinstall it to make sure that it is correctly installed Make sure that you are using a supported DIMM See chapter 7 for ordering information Move the DIMM to a different DIMM slot If the DIMM works in a different slot then DIMM slot 2 is malfunctioning To continue printing remove the DIMM from DIMM slot 2 44 Chapter 2 Service and troubleshooting ENWW Table 1 Accessory error secondary messa
17. 7 Atthe C gt type the ftp IP address for example C gt ftp 12 34 56 78 8 Press Enter if prompted for a user name and then press Enter again if prompted for a password 9 Type put file name rfu Note If the connection timed out message appears type bye and go back to step 7 Various messages appear while the update is in progress 10 Type bye when the FTP prompt returns This could take a few minutes 11 Exit at the regular Command Prompt to return to Windows ENWW Upgrading the firmware 11 12 Chapter 1 Control panel ENWW Service and troubleshooting Contents Troubleshooting aa a BRA ha BKA DA DAA veces BRA GRAB dane ae 15 Pre troubleshooting checklist cece eee 16 Basic troubleshooting 0 cee ete 19 Environmental specifications 6 0 0 sasaa aaaea 22 Printing information pages 0 0 eect eee 26 Configuration page tte 26 Demonstration page 0 2 28 Meriu mapiga paa paaa pede a NIANG aia Sea BAKED AK KATA dace we dake 30 Event log kaa 3k LIGAWAN K AG Loe eb ENG pee ANG et ea eed ee eee 31 Supplies Status page 0 eee eee 32 Troubleshooting control panel messages A eee eres 34 Control Panel Lights 0c aaaea 34 Alphabetical printer messages 0 a 49 Numerical error messages 00 c eee tee 91 Numbered error codes for the CLJ 8550mfp aa 154 Service mode functions 0 0 cc
18. A 2 000 sheet input unit lifting and feed motor error exists 1 Verify that the C link and power cables are connected 2 Turn the printer off and on to reset the printer 3 Verify that no objects are in the left side of the tray 4 Verify that the lifting plate moves freely by hand 5 Verify that the paper size plates are installed correctly and that they are not bent 6 If the error persists replace the paper deck drive assembly bushing 7 If the error persists replace the paper deck drive assembly 8 Check that the paper tray raised sensor P534 is working properly perform a sensor test 9 Check for proper installation of the pickup roller 10 Check the pickup assembly cabling 11 If the error persists replace the pickup assembly 148 Chapter 2 Service and troubleshooting ENWW Table 2 14 Numerical error messages continued Message Description Action CLJ 8500 8550 A multi bin mailbox flipper motor error exists Verify that the C link and power cables are connected 2 Turn the printer off and on to reset the printer 3 Check for jams in the flipper assembly area 4 If the error persists replace the flipper assembly 5 If the error persists replace the multi bin mailbox controller board PCA CLJ 8500 8550 A multi bin mailbox external memory error exists ey Verify that the C link and power cables are connected
19. Theinternal RAM memory 1 Turn the printer off and test failed on to reset the printer CLJ 8500 8550 2 Perform DRAM DIMM test from the formatter diagnostics in the Service Menu 3 If the problem persists replace the bad DIMM 144 Chapter 2 Service and troubleshooting ENWW Table 2 14 Numerical error messages continued Message Description Action alternates with CLJ 4600 CLJ 5500 Scan buffer error 1 Turn the printer off and then on 2 Perform acold reset If the message persists replace the formatter or firmware DIMM CLJ 8500 8550 Indicates a DRAM controller error 1 Turn the printer off and on to reset the printer 2 Perform DRAM DIMM test from the formatter diagnostics on the Service Menu 3 If the problem persists replace the bad DIMM CLJ 8500 8550 A communication error exists between the 2 000 sheet input unit or the multi bin mailbox and the printer X device number in the link YY error code from the optional device 1 Verify that the C link and power cables are connected N Turn the printer off and on to reset the printer ENWW Troubleshooting control panel messages 145 Table 2 14 Numerical error messages continued Message Description Action CLJ 8500 8550 A 2 000 sheet input unit lifting motor error exists 1 Verify that the C link and power cables
20. When the printer malfunctions or encounters an unexpected situation information on the printer control panel messages and or illuminated LEDs alert you to the situation This section contains a pre troubleshooting checklist that helps eliminate many possible causes of the problem The remainder of the chapter provides steps for correcting the problems that have been identified Before beginning any trouble shooting procedure check the following e Are supply items for example the print cartridges fuser and rollers within their rated life e Does the configuration page reveal any configuration problems See Configuration page on page 26 Note The customer is responsible for checking and maintaining supplies and for using supplies that are in good condition The customer is responsible for media and print cartridge supplies The customer is also responsible for replacing the fuser transfer roller and all paper pickup feed and separation rollers that are at or near the end of their rated life ENWW Troubleshooting 15 Pre troubleshooting checklist WARNING Always turn off then unplug the printer before servicing Current is present in the DC power supply whenever the printer is plugged in Before troubleshooting any specific printer problem evaluate the following printer conditions Note This is a generalized troubleshooting list Not all checklist items will apply to all of the printers in this guide e Is
21. e Ordering Information Contains basic information about how to order new HP supplies e Print cartridge Contains a section for each of the print cartridges and provides information about HP print cartridges This information includes the part number for each print cartridge whether each print cartridge is low and the life remaining for each print cartridge e Recycling Information Contains information about the website you can visit for information about recycling e Imaging drum area Contains the same information for the imaging drum that the print cartridge area provides for the print cartridges e Warranty Note Contains information about how the printer warranty is affected when you use non HP supplies It also requests that you call the HP fraud hotline if a supply that is being detected as a non HP supply was sold as a genuine HP supply To print a supplies status page Table 2 8 Printing a supplies status page Product Instructions Press GO and CANCEL JOB simultaneously The Configuration page also prints If you have an HP Jetdirect print server card installed the HP Jetdirect page listing the HP Jetdirect information prints as well Note You can also print a configuration page in the embedded Web server or from the HP Color LaserJet 2500 Series Toolbox Press MENU until appears on the printer control panel display Press ITEM until ii appears on the display Press SELECT to print the
22. some printer memory by Oo removing any unnecessary fonts macros or any data D currently in printer memory If you continue to lose data you might need to add more printer memory For a temporary solution simplify the image 41 3 Unexpected Size error or 41 x Printer error Ac Oe 1 Load the correct size of media If the correct size is loaded press GO 2 If printing does not resume open the top cover remove the imaging drum and check for a jam inside the printer ENWW Troubleshooting control panel messages 39 Table 2 11 Attention secondary messages CLJ 2500 continued 40 Bad Transmission error O e 1 Press GO to try to print a portion of the job If the printer is connected to the network make sure that the cable is securely connected between the HP Jetdirect print server card and the network port If the printer is directly connected to a computer the cable between the printer and computer has a bad connection or the cable is of poor quality Disconnect the cable and reconnect it Make sure that you are using a high quality USB or IEEE 1284 compliant size B parallel cable If the error persists replace the appropriate cable 22 Buffer Overflow error Press GO to try to print a portion of the job The connection between the printer and the computer might be loose Turn the printer off and check the cable connection to make sure that it is
23. CLJ 2500 accessory 42 Attention with Ability to Continue 39 service 46 Select button CLJ 4500 4550 locating 3 CLJ 4600 5500 locating 4 CLJ 8500 8550 locating 5 ENWW sensors CLJ 2500 257 CLJ 4500 4550 262 CLJ 4600 269 CLJ 5500 273 CLJ 8500 8550 279 CPR troubleshooting 65 density troubleshooting 66 120 door tests CLJ 4500 4550 206 OHT troubleshooting 122 temperature humidity 114 testing CLJ 4500 4550 205 separation roller replacing 15 service error messages CLJ 2500 46 service manuals ordering iii part numbers iv Service menu CLJ 2500 186 CLJ 4500 4550 187 CLJ 4600 5500 188 CLJ 8500 8550 189 service mode accessing 183 service notes 289 settings restoring factory default 194 size mismatch paper 87 software troubleshooting 21 solenoids CLJ 4500 4550 264 CLJ 4600 269 CLJ 5500 274 specifications electrical 23 operating environment 22 status lights See lights status page supplies 32 storage environment specifications 22 supplies error messages 73 imaging drum errors 69 life expectancies 241 non HP 17 replacing customer responsibilities 15 status page printing 32 support websites 290 switches CLJ 2500 257 CLJ 4600 268 CLJ 5500 272 Index 297 T technical support 290 temperature humidity sensor errors 114 tests density 243 developer 204 diagnostics mode CLJ 4500 4550 200 door sensors CLJ 4500 4550 206 drum 205 242 engine 199 paper path 215 path sensors CLJ 4500 4550 205 toner cartr
24. CLJ 8500 8550 A user has requested a media size that is not currently installed in tray 1 lt type gt Last media type configured for the input tray lt size gt Last media size configured for the input tray Load the media type and size specified on the printer control panel display After tray 1 is loaded the printer automatically brings itself online If the correct media type and size are loaded in tray 1 and the media does not feed into the printer verify that the printer control panel settings for tray 1 Cassette mode match the media type and size requested ENWW Troubleshooting control panel messages 89 Table 2 13 Alphabetical printer messages continued Message Description Action CLJ 8500 8550 This message appears when media is placed in tray 1 and the tray is configured for Cassette Mode lt size gt Last media size configured for the input tray 1 Press VALUE to view the selections 2 Press SELECT when the media size and type you want appears 3 Press GO to bring the printer online If no key is pressed for 30 seconds after the media is detected in the input tray the displayed size is automatically selected the message is cleared and printing begins CLJ 8500 8550 An input tray not currently selected has run out of media lt X gt Input tray number 2 3 or 4 lt type gt Last media type configured for th
25. ENWW Troubleshooting control panel messages 133 Table 2 14 Numerical error messages continued Message Description Action CLJ 4600 A printer fan error has occurred X Description 1 3 cartridge fan vertical fan F2 4 formatter fan horizontal fan F1 Turn the printer off and then on 57 3 Cartridge fan F2 Reconnect the connector J1004 on the DC controller PCB 2 Immediately after starting the print operation measure the voltage between pins 1 and 3 on the J1004 connector If the voltage changes from 0 V to12 V or 24 V replace the cartridge fan 3 If the error persists replace the DC controller PCB Calibrate the printer after replacing the DC controller 57 4 Formatter fan F1 1 Reconnect the connector J1003 on the DC controller PCB 2 Immediately after turning the printer on measure the voltage between pins 1 and 3 on the J1004 connector If the voltage changes from 0 V to 24 V replace the formatter fan 3 If the error persists replace the DC controller PCB Calibrate the printer after replacing the DC controller 134 Chapter 2 Service and troubleshooting ENWW Table 2 14 Numerical error messages continued Message Description Action X Description Turn the printer off and then 3 cartridge fan vertical fan on FM3 57 3 Cartridge fan FM3 4 formatter fan horizontal 4 Reconnect the CLJ 5500 ka FM2 lv fan FM1
26. Is the problem Replace the dc controller PCB printer unit corrected The fusing heater drive circuit or the fusing heater safety circuit is faulty E809 CLJ 8550mfp The power supply cooling fan FM4 used for the area around the copy module main power supply is faulty This error occurs when the fan error signal FANERR goes to zero 0 for 1 5 seconds or more while the fan is rotating Table 2 46 Cause and solutions for E809error cooling fan on the copy module main power supply PCB and J7 4 GND immediately after the copier is tumed on Cause Issue Solution Connectors Are the relay connector J2031 Connect the connectors securely power connectors J7 and J8 on the copy supply module main power supply PCB and cooling fan connector J1602 on the reader drive controller PCB connected securely assembly Power Does the voltage change to 24 V Replace the power supply cooling supply between connectors J7 3 24 VB fan The dc power Is dc power present in the copy module See the CLJ 8550 mfp service manual Replace the dc controller PCB 180 Chapter 2 Service and troubleshooting ENWW E810 CLJ 8550mfp This error occurs when the drum cartridge detecting switch does not turn on at power on or when the cover is opened closed Table 2 47 Cause and solutions for E810 error Cause Issue Solution Drum Is the drum cartridge set in the cop
27. PowerSave lt 45 W PowerSave lt 45 W Minimum 16 0 Amps at 120 V 7 1 Amps at 220 V recommended circuit capacity for a typical product CLJ 4600 Power 100 to 127 V 10 220 to 240 V 10 requirement 50 60 Hz 2Hz 50 60 Hz 2 Hz Power Printing 426 W Printing 430 W consumption Standby 34 W Standby 36 W PowerSave 30 W PowerSave 32 W Off 0 W Off 0 W Minimum 6 Amps 3 Amps recommended circuit capacity for a typical product CLJ 5500 Power 100 to 127 V 10 220 to 240 V 10 50 60 Hz 2 Hz Power consumption Printing 592 W Standby 54 W PowerSave 48 W Printing 562 W Standby 51 W PowerSave 44 W Off 0 W Off 0 W Minimum 6 Amps 3 Amps recommended circuit capacity for a typical product 24 Chapter 2 Service and troubleshooting ENWW Table 2 3 Electrical specifications Product Item 110 volt models 220 volt models CLJ 8500 Power 100 to 127 V 10 220 to 240 V 10 CLJ 8550 requirement 50 60 Hz 2Hz 50 60 Hz 2 Hz Power Printing color 375 W Printing color 375 W consumption Printing b w 750 W Printing b w 750 W Standby 190 W Standby 190 W PowerSave lt 45 W PowerSave lt 45 W Off lt 2W Off lt 2W Minimum 12 Amps at 120 V 6 Amps at 220V recommended circuit capacity for a typical product ENWW Basic troubleshooting 25 Printing information pages
28. Replace the DC controller PCB Calibrate the printer after replacing the DC controller 232 Chapter 3 Jams ENWW CLJ 4600 5500 jams in tray 2 Table 3 7 Causes for jams in tray 2 CLJ 4600 5500 Issue Solution Separation tabs in the paper cassette are deformed Straighten the tabs on the front corners of the tray or replace the cassette Pickup roller is worn or damaged Replace the pickup roller Feed roller is dirty worn or damaged Clean the feed roller If it is still dirty after cleaning or if it is worn or damaged replace the feed roller Drive gears are damaged Check the drive gears in the paper pickup unit Replace the pickup drive assembly if the gears are damaged Cassette pickup solenoid is damaged 1 Disconnect the connector for the cassette pickup solenoid from the DC controller PCB 2 Measure the resistance between the cable side connectors J1020 13 and J1020 12 3 If the measured resistance is NOT about 160 ohms replace the cassette pickup solenoid Pickup motor is defective Replace the paper pickup drive assembly Paper pickup assembly is defective DC controller PCB is defective Replace the paper pickup assembly Replace the DC controller PCB Calibrate the printer after replacing the DC controller ENWW Persistent jam troubleshooting 233 CLJ 4600 5500 jams in tray 3 Table 3 8 Causes for jams in tray 3 CLJ 460
29. Service menu 188 service mode accessing 185 solenoids 269 switches 268 CLJ 5500 assemblies illustrations 271 calibration 193 clutches 274 color calibration 247 control panel lights and buttons 4 jams clearing 223 jams troubleshooting persistent 229 language setting 6 motors and fans 275 paper path test 216 PCBs 276 power on sequences 285 sensors 273 Service menu 188 service mode accessing 185 solenoids 274 switches 272 292 Index CLJ 8500 8550 2 000 sheet input tray status light 209 assemblies illustrations 277 color calibration 247 control panel lights and buttons 5 drum test 242 heaters 281 jams clearing 226 language setting 7 motors 281 paper path test 217 PCAs 282 sensors 279 Service menu 189 service mode accessing 185 transfer wrap jams 238 CLJ 8550mfp error messages 154 close door error messages 60 clutches CLJ 4500 4550 264 CLJ 5500 274 cold reset 194 color calibration 245 matching troubleshooting 243 244 color LaserJet 2500 See CLJ 2500 color LaserJet 4500 4550 See CLJ 4500 4550 color LaserJet 4600 See CLJ 4600 color LaserJet 5500 See CLJ 5500 color LaserJet 8500 8550 See CLJ 8500 8550 components illustrations CLJ 2500 256 CLJ 4500 4550 260 CLJ 4600 267 CLJ 5500 271 CLJ 8500 8550 277 configuration page information included on 26 not printing troubleshooting 16 21 printing 27 consumables See supplies ENWW control panel access denied 49 accessory e
30. Table 2 13 Alphabetical printer messages continued Message Description Action This message occurs if you do not have the intermediate transfer belt installed in the printer or if sensor PS5 does not detect the home position marks on the ITB The ITB must be rotating before PS5 is able to detect its home positioning marks Both the ITB and the imaging drum are driven by the drum motor M4 1 Check SW1 to make sure it is operating correctly and make sure the cables are connected 2 Verify that the ITB is installed in the printer 3 If the ITB is installed and seated properly verify that PS5 is not damaged PS5 is located on the ITB assembly If the sensor appears to be damaged replace the ITB assembly 4 Clean PS5 5 Check all wiring within the ITB drawer Note the connection on the ITB assembly located on the front lower left hand corner of the assembly When the drawer is closed the connector mates with a receptacle connector on the drawer Verify that the connector and wiring are in good condition Make sure that there is no paper in the connector at the base of the drawer 6 Verify that the drum motor M4 is rotating the imaging drum and the ITB Run the drum test from diagnostic mode to verify drive spindle movement for both the imaging drum and ITB 7 Verify that the imaging drum connector is seated into the connector J204 of the developing PCB
31. replace the VTU The printer senses a media jam in the transfer or registration area in an input tray or in the duplexer 1 Open the front door press the white button on the lower green lever and swing the lever to the right Open the right upper door remove the transfer drum and remove the jammed media from under the metal paper guide Reinstall the transfer drum and close the right upper door Swing the lower green lever to the left and close the front door 2 Open each input tray remove any jammed media and close the input tray 3 Open the left lower cover remove the duplexer remove the jammed media reinstall the duplexer and close the left lower cover 4 Check the entire paper path for paper ENWW Troubleshooting control panel messages 55 Table 2 13 Alphabetical printer messages continued Message Description Action Check the event log message These instructions are for event log messages and 13 Check the event log message These instructions are for event log message The printer senses a media jam in the multi bin mailbox Event log message 13 22 01 13 22 02 The printer senses a media jam in the multi bin mailbox Event log message 13 22 03 1 Open the jam access door and remove any media 2 Verify that the left face up output bin full sensor PSFaceFull flag moves freely 3 Verify
32. ARROW at any time to move to the previous digit CLJ 8500 1 From a READY state press MENU until CLJ 8550 SERVICE MENU appears 2 Press ITEM the left side of the key and VALUE simultaneously ENWW Service mode functions 185 Service menu items Table 2 52 Service menu items Product Service menu items CLJ 2500 The CLJ 2500 does not have a control panel display Service mode information is modified or set using PJL commands The X AND entries in the PUL command list below are placeholders Replace them with the correct serial and formatter information and page counts Page count information is found on the printer configuration page See page 26 ESC 12345X PJL SET SERVICEMODE HPBOISEID PJL SET SERIALNUMBER XXXXXXXX PJL SET FORMATTERNUMBER XXXX PJL SET PAGES PJL SET COLORPAGES PJL SET SERVICEMODE EXIT ESC 12345X Access the MS DOS command prompt and open the MS DOS editor window 1 Go to the Windows Start menu and open the Programs then Accessories menus 2 Select Command Prompt from the menu list 3 The command prompt window appears Type in EDIT no quotation marks and then press the ENTER key 4 The MS DOS editor widow will appear The CLJ 2500 does not have a control panel For service mode functions see hp embedded web server for hp LaserJet printers and mips 186 Chapter 2 Service and troubleshooting ENWW Tab
33. CLJ 2500 See the service notes and work instructions for this product CLJ 4500 4550 See the service notes and work instructions for these products CLJ 4600 5500 If jams occur repeatedly use the information in this section to diagnose the root cause of the problem The tables in this section list possible causes and recommended solutions for jams in each area of the paper path Items are listed in the order in which you should investigate In general items at the beginning of the list are relatively minor repairs Items at the end of the list are more significant repairs CLJ 4500 4550 basic troubleshooting for paper jams The basic troubleshooting process for paper jams consists of the following 1 Gather data 2 Identify the cause of the problem 3 Fix the problem CLJ 4500 4550 data collection To troubleshoot paper jams gather the following information e the exact paper jam error code that appears on the control panel e the location of the leading edge of the media in the paper path e whether media is in the paper path when the jam occurs or if media is stuck in the input tray e whether the jam occurs at power up or while paper is moving e whether the media is damaged and if it is where the damage occurs on the media and where in the paper path the media stops e whether the jam occurs when feeding from one particular tray e whether the jam occurs only when using duplex printing e whether a particular type of
34. Do not perform the color balance adjustment procedure until all of the following troubleshooting methods have been completed e Experiment with the printer driver and application settings to adjust the color output e Clean the density sensor Complete the troubleshooting solutions located in the service manual Print the color adjust page 1 Press GO and VALUE at the same time appears on the product control panel display Press ITEM until appears on the display Press SELECT to print the color adjust page Press GO to exit the Color Adjust Menu Note the numbers beside the red arrows for later reference O a fF OON The color adjust page indicates the last set of saved color settings with a red arrow next to the saved setting The default for each color is 0 other possible settings consist of 6 through 6 7 Determine the color adjustment numbers for each color in the color ramps 8 Examine the color adjust page from a distance of 6 feet approximately 2 m Find the circle of each color that most closely matches the background color It might be necessary to squint slightly to match the colors Record the number in the circle Image quality 247 Table 4 4 Adjusting color calibration continued Product CLJ 8500 CLJ 8550 continued Instructions 9 Press GO and VALUE at the same time appears on the display 10 Press ITEM until the option you want appears on the display 11
35. Note You can also gain access to information pages for the CLJ 2500 CLJ 4600 and CLJ 5500 through the embedded web server For information on using the embedded web server see Configuration page Use the configuration page to view current printer settings and properties to help troubleshoot printer problems or to verify installation of optional accessories such as memory DIMMs paper trays and printer languages The following sections are included the configuration page of most printers e Printer Information Contains basic information about the printer such as the product name printer name and page count e Configuration menu Lists the current settings of the configuration menu items e Event Log Contains information about printer errors e Usage information Contains the number and types of pages printed e Installed personalities and options This section contains information about optional items that might be installed such as DIMMs or an HP Jetdirect print server card e Memory Lists memory related information such as the total memory installed e Security Contains information about security features such as whether the printer control panel password is enabled or disabled e Paper Tray Information Contains information about the trays such as whether optional trays are installed and the type and size of paper that might be set for each tray e I O menu Lists the current settings of the I O menu items e C
36. Press VALUE until the number recorded earlier appears on the display 12 Press SELECT to enter the number into the product memory An asterisk appears to the right of the selection 13 Repeat steps above to adjust the color screens as necessary Reprint the color adjust page 14 Examine the new color adjust test page and verify that the color adjustment is correct e Verify that each of the color ramps black cyan magenta and yellow matches the background for each color and has a red arrow next to the circle If another circle matches the background more closely return to step 4 to reset the values at the control panel to the number shown in that circle e Verify that the circles in the neutral axis areas of the color adjust test page are neutral gray gray without a color tint and then verify that one of the circles in the ramp is a color very close to the background If the circles are not neutral gray additional corrections to cyan magenta or yellow might be necessary If there is an overall tint of color in the circles make the adjustments suggested by the following table However the most accurate correction is determined by the circles in the individual black cyan magenta and yellow ramps 248 Chapter 4 Print quality ENWW Repetitive defects troubleshooting Repetitive defects are defects that occur on the page Most repetitive defects are caused by problems with one of the following e Developer roller
37. a Kh os Figure 5 26 CLJ 8500 8550 PCA assemblies Reference CLJ 8500 855 component 1 PCA cassette size sensing PCA main relay wo PCA controller board PCA controller board for HP CLJ 8550 MFP PCA carousel motor M1 PCA subrelay PCA tray 1 Nf 2 or A PCA ECO 2 assembly HP CLJ 8550 MPF Interface PCB assembly HP CLJ 8550 MPF Interface cable HP CLJ 8550 MPF IOT cable HP CLJ 8550 MPF ECO 2 cable HP CLJ 8550 MPF 282 Chapter 5 Illustrations ENWW Power on sequences CLJ 2500 y CPU initialization i ASIC initialization Formatter communication ready 1 Formatter communication start t Printer ID check Motor initial drive Main motor Toner cartridge motor Developing rotary motor Fuser motor Engaging motor Memory tag for toner cartridges imaging drum communication start Y Toner cartridge presence level life check i Image cartridge presence life waste toner full check Laser scanner motor initial drive 1 Laser scanner motor initial drive check j Residual paper door open Failure check period check period Maximum image density control D max i Halftone calibration detection control D half Image stabilization Se
38. and J682 on the Connect the connectors heat pre exposure LED relay PCB and relay securely discharge connectors J18 and J17 connectors fan 3 drive Y645 and J647 on the main relay PCB and connector J227 on the dc aseemiiiy controller PCB connected securely Connectors Are connectors J641 on the main relay Connect the connectors 24 V for PCB and J102 on the dc power supply securely heat connected securely discharge fan 3 drive Heat Does the voltage change to about 24 V Replace the heat discharge fan discharge between connectors J645 3 FAN3ON 3 fan 2 on the main relay PCB and J645 1 GND immediately after the copier is turned on Main relay 7 Does the voltage change to 24V Replace the main relay PCB PCB between connectors J641 1 24 VB and J641 4 GND on the main relay PCB immediately after the copier is turned on The dc Is the dc power present in the printer See the CLJ 8550 mfp service power unit manual printer unit Replace the dc controller PCB ENWW Troubleshooting control panel messages 179 E808 CLJ 8550mfp The fusing drive circuit power unit is faulty This error occurs when the fusing heater safety circuit has detected a fault in the upper and lower fusing heaters Table 2 45 Cause and solutions for E808 error Cause Issue Solution Fusing Replace the fusing assembly Is the End assembly problem corrected Power Replace the power supply on the End supply printer side
39. calibration control ENWW Standby Power on sequences 283 CLJ 4500 4550 This information is not available for this product CLJ 4600 Table 5 3 Basic operation sequence CLJ 4600 Period Purpose Remark WAIT From the time the To clear a potential on During this period the printer wait power switch is the drum surface and to checks the toner level and period turnedonuntilthe clean the ETB detects whether the cartridges ETB cleaning is are present completed The printer also executes the pulse width modulation adjustment color registration adjustment and image density calibration control as required STBY From the end of the To keep the printer When the formatter sends a standby WAIT or LSTR ready to print sleep command the printer period period or last enters PowerSave mode rotation until the formatter inputs a print command or until the power is turned off INTR From immediately To stabilize the initial 8 after the formatter photosensitive drum s rotations inputs a print sensitivity in period command until the preparation for a print TOP signal is sent to operation the formatter PRINT From the end of the To form an image on After the power is turned on print INTR period until the the photosensitive drum the cartridge is cleaned every period leading edge according to the video 35 pages and the ETB is detection sensor signal input from the clea
40. exchanged between the printer and its controller 1 Tum the printer off and on to reset the printer Verify that the controller board is fully seated CLJ 8500 8550 An input feed error such as requesting to feed transparencies through the duplexer has occurred or the input tray is not installed 1 If the input tray you are trying to print from is not installed install the input tray Turn the printer off and on to reset the printer 124 Chapter 2 Service and troubleshooting ENWW Table 2 14 Numerical error messages continued Message Description Action CLJ 8500 8550 An illegal output error has occurred For example the multi bin mailbox is not installed and it was selected as the output destination or transparencies are present in the duplexer 1 Open the printer and remove media from the paper path 2 Verify that the media type is set in the printer control panel 3 Turn the printer off and on to reset the printer CLJ 4500 4550 ka The printer detected that the fan an exhaust fan located in the upper left rear corner of the printer is not rotating This fan operates off 24 Vdc and is controlled by the DC controller PCB microprocessor 1 Turn the printer off and on to reset the printer Visually check to see if the fan is rotating if you cannot see any rotation place your hand over the outlet vents
41. is hot wait 10 minutes for it to cool down 2 Firmly lift the two green handles on either side of the fuser to disengage the fuser rollers 3 Open the fuser cover and remove the media 4 Firmly press down on the two green handles on either side of the fuser to re engage the fuser rollers During a duplex print job media was delayed in the output bin before it entered the duplex path 1 Open the top cover WARNING The fuser is hot wait 10 minutes for it to cool down 2 Firmly lift the two green handles on either side of the fuser to disengage the fuser rollers 3 Pull media by both corners to remove it 4 Firmly press down on the two green handles on either side of the fuser to re engage the fuser rollers 224 Chapter 3 Jams ENWW Table 3 4 Jam locations and error messages CLJ 4600 5500 Message Solution During a duplex print job media was removed from the output bin before it entered the duplex path or media has entered the duplex path but it is stuck 1 Open the top cover and the front cover Do not open the ETB 2 Pull media by both corners to remove it One of the covers is not completely closed Ensure both covers are closed before printing 1 Open the covers and the ETB 2 Pull media by both corners to remove it ENWW Jams 225 CLJ 8500 8550 jam locations Top face down output bin Top face down delivery ie output bin PS11 V Fac
42. is not open position in the printer Developing Close the print cartridge cover and turn Go to step 6 rotary motor the power off and then on Is the Go to step 3 drive developing rotary stopper arm still assembly holding the developing rotary assembly in place Connector Are connectors J704 and J706 on the 787 Connect the connectors developing developing rotary motor PCB and securely rotary drive connector J220 on the dc controller PCB assembly connected securely 5 V supply Are connector J43 of the developing Connect the connectors line rotary position sensor relay connector securely developing 942 and connector J207 on the dc rotary controller PCB connected securely position sensor 160 Chapter 2 Service and troubleshooting ENWW Table 2 23 Cause and solutions for E021 error continued Developing rotary position sensor Replace the developing rotary position sensor Is the problem corrected End Developing rotary stopper Is the operation of the developing rotary stopper arm normal Disconnect connector J705 of the developing rotary stop solenoid SL5 then measure the resistance between connectors J605 10 and J605 12 on the harness side and between J705 11 and J705 12 Is it about 302 to 602 Replace the developing rotary stopper solenoid Developing rotary motor PCB Does the voltage between connectors J220 A6 RLSROT and J220 B5 GND on the dc contro
43. memory count press and hold DOWN ARROW until all three lights on the control panel are lit Press Up ARROW Press PAUSE RESUME The display should show Press UP ARROW until 2 highlighted Press SELECT The printer will skip calibration and then continue its power on sequence Calibrate Now CLJ 4600 and CLJ 5500 only Use the following procedure to calibrate the CLJ 8500 or CLJ 8550 whenever you replace the DC controller the ETB the drum drive motors the drum drive gears or a laser scanner 1 on Oa oO FF WO N Press SELECT to enter the Press DOWN ARROW to highlight Press SELECT to select Press DOWN ARROW to highlight Press SELECT to select Press DOWN ARROW to highlight Press SELECT to select Wait for the printer to calibrate ENWW Hard disk initialization 193 Cold Reset Cold reset clears all data from the print buffer and returns the printing menu and the configuration menu to the factory default settings To perform a cold reset Product Instructions CLJ 2500 Turn the printer off Press and hold down the Go button Turn the printer on and continue to hold the GO button After the Go Attention and Ready LEDs turn on continue holding the GO button for approximately five seconds but not longer than fifteen seconds During this process the Attention LED will turn off 4 Release the GO button Note If either the Go or Ready LED turned off or no LEDs turned off before the GO butt
44. more replace the laser scanner unit If the error persists replace the controller board 110 Chapter 2 Service and troubleshooting ENWW Table 2 14 Numerical error messages continued Message Description Action alternates with CLJ 4600 CLJ 5500 A printer error has occurred X Description CLJ 4600 1 scanner error 2 scanner startup error 3 scanner rotation error Y Description 0 no color K black C cyan M magenta Y yellow 1 Press SELECT to continue N Turn the printer off and then on 3 Reseat the connectors between the laser scanner and DC controller PCB J1009 J1012 4 Replace the laser scanner assembly if it is defective Calibrate the printer after replacing the laser scanner See Calibrate Now CLJ 4600 and CLJ 5500 only on page 193 5 If the error persists replace the DC controller PCB Calibrate the printer after replacing the DC controller CLJ 4600 CLJ 5500 An error has occurred in the onboard RAM pa ng Press SELECT to continue 2 Turn the printer off and then on ENWW Troubleshooting control panel messages 111 Table 2 14 Numerical error messages continued Message Description Action CLJ 4500 4550 CLJ 4600 CLJ 5500 CLJ 8500 8550 A memory error has occurred If a DIMM caused the error the DIMM will not be recognized configured X Me
45. motor M1 and the rotation of the motor is checked in reference to the flag blocking the pick up roller sensor S5 The E401 error is indicated when the sensor does not turn on and off two times or more within one second E402 CLJ 8550mfp The error shown on the touch screen display is in the ADF See the CLJ 8550 mfp service manual This error indicates that either the belt motor M3 fails to rotate or the belt motor clock S10 is faulty This error occurs when the number of belt motor clock pulses within 200 ms is less than a specific value E403 CLJ 8550mfp The error shown on the touch screen display is in the ADF See the CLJ 8550 mfp service manual This error indicates that either the ADF motor M2 fails to rotate or the ADF motor clock sensor S9 is faulty This error occurs when the number of ADF motor clock pulses within 200 ms is less than a specific value E404 CLJ 8550mfp The error shown on the touch screen display is in the ADF See the CLJ 8550 mfp service manual This error indicates that either the delivery motor M5 fails to rotate or the delivery motor clock sensor S13 is faulty This error occurs when the number of ADF motor clock pulses within 200 ms is less than a specific value E411 CLJ 8550mfp The error shown on the touch screen display is in the ADF See the CLJ 8550 mfp service manual This error indicates that either the document tray paper sensor S1 or the registration sensor S
46. number or by choosing an HP product from a list See the hp LaserJet Quick Reference Color Parts Guide 5851 1642 for a complete parts list and printer illustrations http Awww hp com go partsinfo To order parts go to http www partsdirect hp com 290 Appendix A Service support ENWW Index Numerics 2 000 sheet input tray DIP switches CLJ 8500 8550 210 jams 53 motor errors 146 sensor test CLJ 4500 4550 208 status light CLJ 8500 8550 209 A access denied control panel menus 49 accessory error messages CLJ 2500 42 alphabetical list error messages 49 Attention light accessory error messages CLJ 2500 42 Attention with Ability to Continue messages CLJ 2500 39 CLJ 2500 locating 2 CLJ 2500 messages 35 CLJ 2500 status 34 CLJ 4500 4550 locating 3 CLJ 4600 5500 locating 4 CLJ 8500 8550 locating 5 service error messages CLJ 2500 46 B Back arrow button 4 Bad Transmission error 40 beam detect errors 46 94 108 belt transfer 85 bins errors 125 full 72 89 jams 58 top sensor errors 86 Black print cartridge light 2 buffer errors 40 48 145 buttons CLJ 2500 2 CLJ 4500 4550 3 CLJ 4600 5500 4 CLJ 8500 8550 5 engine test 199 ENWW Cc cables troubleshooting 21 40 calibration CLJ 4600 5500 193 color 245 Cancel Job button CLJ 2500 locating 2 CLJ 2500 using 35 CLJ 4500 4550 locating 3 CLJ 4600 5500 locating 4 CLJ 8500 8550 locating 5 carousel developer test C
47. on the dc controller fan 2 drive PCB connected assembly Connectors Is connector J701 on the developing Connect the connectors securely 24 V for rotary motor PCB connectors J648 heat and J641 on the main relay PCB and discharge connector J102 on the dc power fan 2 drive supply connected securely Heat Does the voltage change to about 24 Replace the heat discharge fan 2 discharge V between connector J703 3 fan 2 FAN2ON and J703 1 GND on the developing rotary motor PCB immediately after the copier is turned on Does the voltage change to about 24 V for connector J702 1 GND Developing Does the voltage change to about 24 Replace the developing rotary motor PCB printer unit Main relay Does the voltage change to 24V Replace the main relay PCB PCB between connectors J641 1 24 VB and J641 4 GND on the main relay PCB immediately after the copier is turned on The dc Is the dc power present in the printer See the CLJ 8550 mfp service power unit manual Replace the dc controller PCB 178 Chapter 2 Service and troubleshooting ENWW E807 CLJ 8550mfp The heat discharge fan FM3 used for the area around the scanner is faulty This error occurs when the fan motor lock signal FAN3LK goes to one 1 for 1 5 seconds or more while the fan is rotating Table 2 44 Cause and solutions for E807 error Cause Issue Solution Connectors Are connectors J681
48. one test to another or to change the DIP switch settings turn the power supply on the 2 000 sheet input unit to operational mode Reset the DIP switches on the controller PCA and then switch the power supply back to diagnostic mode to enable the new diagnostic test 210 Chapter 2 Service and troubleshooting ENWW Service LED interpretation CLJ 8500 8550 If the CLJ 8500 8550 2 000 sheet input unit is working properly it will pick up paper from tray 4 and expel it the bottom service LED will flash regularly every 0 5 seconds Table 1 Patterns of LED flashing CLJ 8500 8550 Long Short Description Recommended action 1 sec 0 3 sec e EOE 3 1 Lifter malfunction Verify that the tray lifts freely by lifting it by hand Verify that the paper size plates are installed correctly in the same corresponding slots and are not bent If neither of these is the problem replace tray 4 2 1 Registration sensor The media does not reach the sensor delay jam Open the VTU door and remove the media Replace the paper feed VTU assembly or the paper pick up assembly 2 2 Registration sensor Open the VTU door and remove the media stationary jam initial Check the sensors and replace the jam corresponding field replaceable unit 2 3 Jam sensor delay The media did not reach the sensor Open jam the VTU door and remove the media Replace the paper feed VTU assembly or the paper pick up assembly 2 4 Jam sensor Ope
49. pages Magenta print cartridge 12 000 pages CLJ 8500 Black print cartridge 17 000 pages CLJ 8550 Cyan print cartridge 8 500 pages Yellow print cartridge 8 500 pages Magenta print cartridge 8 500 pages The estimated toner cartridge life is based on letter or A4 sized paper with an average of five percent toner coverage and a medium density setting In some color LaserJet products print cartridge life can be extended further by using the draft mode settings which conserves toner ENWW Life expectancies of print cartridges 241 Image quality For information and examples of image defects see your product s service manual Note Whenever you experience color related issues calibrate the product before trying any other steps Drum functional test Note The CLJ 2500 CLJ 4600 CLJ 5500 do not support the drum functional test Table 4 3 Drum functional test Product Instructions 1 Press the ITEM key until T is displayed 2 Hn ue BELEGT key to run the test The front panel will display while the test is running Watch to see if the ITB lift cams turn and if both the drum drive gear and the ITB drive gear are rotating 1 Press the left side of the ITEM button and the VALUE button at the same time 2 Press ITEM unti appears on the display 3 Press VALUE until E appears on the display 4 Press SELECT to initiate the drum test 242 Chapter 4 Print quality ENWW Print density test an
50. printer messages continued Message Description Action The printer senses a media jam in tray 1 or the media is longer than what was expected lt type gt Media type specified in the printer driver or application lt size gt Media size specified in the printer driver or application The lt type gt and lt size gt can be the default media type and size if an automatic paper override has occurred or if GO was pressed during a mount request 1 Open the right upper door and remove the jammed media 2 Load the media type and size indicated on the printer control panel The printer is attempting to remove unusable media such as a misfed page jam No action is required The printer senses that one of the doors is not closed correctly pa Close the door indicated in the message 2 Check the function of the door interlocks see the service manual for interlock locations The covers need to be closed 1 Press HELP for more information 2 Close the front covers Note This message might also appear if the fuser is missing or incorrectly installed Ensure that the fuser is correctly installed The duplex drawer is not completely closed Close the duplex drawer 60 Chapter 2 Service and troubleshooting ENWW Table 2 13 Alphabetical printer messages continued Message Description Action The drawer that holds
51. scanner cable 4 Replace the laser scanner 46 Chapter 2 Service and troubleshooting ENWW Table 2 12 Service error secondary messages CLJ 2500 continued 55 x Engine communication 1 error Turn the printer off and then on Check the connections to the formatter and the dc controller Replace the formatter Replace the dc controller Replace the laser scanner 49 xxxxx Formatter engine 1 error The control panel lights are blinking or the magenta print cartridge yellow print cartridge and imaging drum lights are on Turn the printer off and then on Replace the formatter 50 X Fuser error 1 Turn the printer off for approximately 20 to 30 minutes and then turn the printer on If the error persists replace the fuser ENWW Troubleshooting control panel messages 47 Table 2 12 Service error secondary messages CLJ 2500 continued 57 x Fan motor error 1 Turn the printer off and then Ait 2 Turn the printer off and then LR reseat the cable that connects Oo the fan and the formatter Replace the fan 3 4 Replace the dc controller 64 Scan buffer error 1 Turn the printer off and then 2 Replace the formatter Ow 48 Chapter 2 Service and troubleshooting ENWW Alphabetical printer messages The following table contains the alphabetical error messages for all of the printer models that are covered in this guide Because different m
52. secure The cable is malfunctioning Try using a different high quality USB or IEEE 1284 compliant size B parallel cable See chapter 7 for ordering information If the error persists reduce the complexity of the print job and try again to print 40 Chapter 2 Service and troubleshooting ENWW Table 2 11 Attention secondary messages CLJ 2500 continued Ao OW ka PJ Su IN Chosen Personality Not Available error The current job was canceled because the printer language personality is not supported 1 Press GO to clear the message 2 If you printed the job using one of the PCL drivers try printing using the PS driver or vice versa 3 Turn off the printer and remove or replace the language font DIMM CAUTION You must turn off the printer before inserting or removing DIMMs Data Received error The printer received data and is waiting for a form feed Press GO to print the last page Sending another print job can also cause the page to print D Oo General Attention with Ability to Press GO to try to continue Continue error printing aie If the error persists switch NG printer drivers and try again to Osa print ENWW Troubleshooting control panel messages 41 Table 2 11 Attention secondary messages CLJ 2500 continued 68 x Permanent Storage error Press GO to clear the message Check the printer settings The nonvolatile memory NVRAM Re
53. select the appropriate color cyan magenta or yellow to view or change its registration number 2 Press the ALUE key to change the registration number to the one identified 3 Press the SELECT key to enter the value Setting margin numbers CLJ 4500 4550 only The top margin number is not tray dependent like the left side margin You can print the registration page from whichever tray has paper Using a ruler measure from the top edge of the paper to the series of lines Find the line that is 13 mm 0 5 in away from the edge of the paper Setting the top margin registration value 1 Press the ITEM key to scroll through the Service menu until top margin is displayed 2 Press the MENU key until the number to be entered is displayed 3 Press the SELECT key to enter the number Print another registration page and the number just entered will align with the arrow and be bold The left side margin setting is tray dependent Tray 1 has its own number while Trays 2 and 3 are combined The procedure is the same as the top margin with one exception The page must be printed from the tray that will be adjusted ENWW Hard disk initialization 197 Printing from Tray 1 1 Press the ITEM key until displayed Press the SELECT key 1 default is 3 Measure from the left side of the paper to the lines and find the line that is 13 mm 0 5 in from the edge of the paper lf the number for the line is different then the curren
54. the ADF See the CLJ 8550 mfp service manual This error indicates that the IC for communication on the ADF side is faulty This error occurs when the communication with the copy module has been interrupted for five seconds or more E717 CLJ 8550mfp This error occurs when the copy module is started after disconnecting the copy data control without canceling the open circuit detection mechanism of the copy module If this error has occurred execute error clear and set COPIER 5 OPTION gt IN FACE gt B CLR in service mode to O and then disconnect the copy data controller Note The copy data controller is not available for the LU8550 MFP 176 Chapter 2 Service and troubleshooting ENWW E805 CLJ 8550mfp The heat discharge fan 1 FM used for the fusing assembly and area near the feeding assembly is faulty This error occurs when the motor lock signal FAN1LK goes to one 1 for 1 5 seconds or more while the fan is rotating Table 2 42 Cause and solutions for E805 error rotary motor PCB between connectors J701 1 24 VB and J701 2 GND on the developing rotary motor PCB immediately after the copier is turned on Cause Issue Solution Connectors Are connectors J702 and J706 on the Connect the connectors heat developing rotary motor PCB and securely discharge connector J220 on the dc controller fan 1 drive PCB connected securely assembly Connectors Are connector J701 on the developing Connect
55. the CANCEL JOB key and holding it down until the display shows the menu again In some cases it will take several seconds To cancel the NVRAM test while it is running press the CANCEL JOB key and hold it down until the display show the menu again NVRAM is put back in its original form and an error is logged in the Fault log When the Attention LED is on then there has been an error in the test Press the MENU key to get to the Fault log menu the ITEM key to see the different log messages and the VALUE key to scroll the message back and forth 200 Chapter 2 Service and troubleshooting ENWW Gaining access to the diagnostics mode e To access the diagnostics mode hold down the left side of the ITEM key and turn on the printer Formatter diagnostics are designed to be used by qualified service personnel This set of tests are designed to thoroughly test the functionality of the formatter If all the tests pass the formatter is working correctly and it is likely that the problem resides elsewhere Listed below are descriptions of the formatter tests available CAUTION NVRAM can be lost if the printer is turned off during testing Note In the 4550 series you can abort a test run by pressing the CANCEL JOB key and holding it down until the display shows the menu again In some cases it will take several seconds To cancel the NVRAM test while it is running press the CANCEL JOB key and hold it down until the display show the me
56. the connectors 24 V for rotary motor PCB connectors J648 securely heat and J641 on the main relay PCB and discharge J102 on the dc power supply fan 1 drive connected securely Heat Does the voltage change to about 24 V Replace the heat discharge fan discharge between connectors J702 3 FAN1ON 1 fan 1 on the developing rotary motor PCB and J702 1 GND Developing Does the voltage change to about 24 V Replace the developing rotary motor PCB Main relay Does the voltage between connectors Replace the main relay PCB PCB J641 1 24 VB and J641 4 GND on the main relay PCB change to 24 V immediately after the copier is turned on The dc Is the dc power present See the CLJ 8550 mfp service power manual Replace the dc controller PCB ENWW Troubleshooting control panel messages 177 E806 CLJ 8550mfp The heat discharge fan 2 FM2 used for the area around the intermediate transfer drum is faulty This error occurs when the fan motor lock signal FAN2LK goes to one 1 for 1 5 seconds or more while the fan is rotating Table 2 43 Cause and solutions for E806 error rotary motor PCB V between connectors J701 1 24 VB and J701 2 GND on the developing rotary motor PCB immediately after the copier is turned on Cause Issue Solution Connectors Are connectors J603 and J706 on the Connect the connectors securely heat developing rotary motor PCB and discharge connector J220
57. the toner into the fabric 1 Complete one of these steps e If the paper is not almost completely visible from the top output bin proceed to step 2 e If the paper is almost completely visible pull it carefully out of the printer and proceed to the step 9 2 Open the rear output door If the leading edge of the paper is visible from the rear opening carefully pull the paper out 4 If the jam is too far into the printer to remove turn off the printer and disconnect the power cable CAUTION Always turn off the printer and disconnect the power cable before you remove the fuser 5 Rotate the locks on the fuser to the unlocked position 6 Grasp the fuser handles and pull to remove the fuser from the printer WARNING The parts on the internal surface of the fuser are very hot To avoid burning yourself do not touch those parts 7 Using both hands slowly and steadily remove any paper from inside the printer Then carefully reinsert the fuser and secure the locks 8 Reconnect the power cable and turn on the printer 9 Open the top cover close it again and then press GO if the Go light is flashing If the Attention light is still blinking then there is another jam See CLJ 2500 to clear jams from inside the printer on page 219 and CLJ 2500 to clear jams from input areas on page 219 220 Chapter 3 Jams ENWW CLJ 4500 4550 jam locations Figure 3 2 Jam locations CLJ 4500 4550 shown with the
58. transfer unit is missing or incorrectly installed Ensure that the transfer unit is correctly installed CLJ 4600 ETB motor error 1 Clean the ETB unit intermediate connector J4017 If the connector is damaged replace it Reconnect the connectors J4022 for the ETB motor J4017 between the ETB and the printer and J4014 on the DC controller PCB 3 If the error persists replace the ETB motor 4 If the error persists replace the DC controller PCB Calibrate the printer after replacing the DC controller ENWW Troubleshooting control panel messages 139 Table 2 14 Numerical error messages continued Message Description Action alternates with CLJ 4600 CLJ 8500 8550 continued Fuser motor error 1 Reconnect the connectors J4030 for the fuser motor and J1002 on the DC controller PCB Replace any damaged parts 2 If the error persists replace the fuser drive assembly 3 If the error persists replace the DC controller PCB Calibrate the printer after replacing the DC controller Print cartridge motor error 1 Reconnect the print cartridge connector on the DC controller PCB J1013 for cyan J1031 for magenta J1032 for yellow and J1033 for black 2 Ifthe error persists replace the drum drive assembly for the indicated print cartridge 3 If the error persists replace the DC controller PCB Calibrate the printer after replacing the DC controll
59. value then there is a possible problem Identify the sensor or switch in the table above and test to see if the value changes Cassette paper size settings for each tray are described in the table below Table 2 59 Paper size settings CLJ 4500 4550 Paper Size Tray 2 switches Tray 3 switches DEF HIJ A4 000 000 i 001 001 Custom A5 010 011 Custom B5 ISO 011 011 Letter 100 100 Executive 101 101 Legal 110 110 No tray installed 111 111 Path sensors CLJ 2500 4600 5500 8500 8550 See chapter 5 for locations of path sensors Door sensor test CLJ 4500 4550 The door sensor test allows service personnel to open and close doors on the printer while watching the sensor status on the front panel Switches 4 and 5 are in series with each other which causes the value to toggle under identifier A 206 Chapter 2 Service and troubleshooting ENWW Once the door sensor test is initiated the front panel displays the status for each sensor listed in the table below As a door is opened and closed the state of the sensor changes the indicator values on the front panel Table 2 60 Sensor status CLJ 4500 4550 Name Description SW 4 and Front and rear door switches SW5 Swi ITB drawer switch SW2 Print cartridge door SW3 Drum drawer switch Drum Detect if a drum cartridge is installed detect Fuser Detects if fuser is installed Changes the state
60. websites a sred oe ee ee ROS Pe ea ene ee EO A ee EA 290 ENWW 287 Obtaining work instructions To gain access to work instructions 1 Open a web browser such as Internet Explorer or Netscape Navigator 2 Type http partner americas hp com in the Address or Go box and then press Enter Under enter site click hp partner web Type your user name and password and then click OK Click support Under technical support information click technical support website Click online work instructions 3 4 5 6 7 8 Table 5 5 Commonly used work instructions Select the product that you want from one of the lists Product Number Descriptions bp190005 HP Color LaserJet 4500 and 4550 series Printers Error 54 2 bp190006 HP Color LaserJet 4500 and 4550 series Printers Printing Blank Pages bp190008 HP Color LaserJet 4500 and 4550 series Printers 13 0 Paper Jam HP Color LaserJet 4500 13 1 HP Color LaserJet 4550 bp190043 HP Color LaserJet 4500 and 4550 series Printers Five Types of Ghosting bp190129 HP Color LaserJet 4500 and 4550 series Printers Middle Front Drawer Will Not Open or Close bp190333 HP Color LaserJet 4600 series Printers Multi feeds from Tray 2 or Tray 3 288 Appendix A Service support ENWW Embedded web server Use the HP Embedded Web Server to view information pages for the CLJ 2500 CLJ 4600 and CLJ 5500 Here is how to gain access to the embedded Web server
61. 0 5500 Issue Solution are deformed Separation tabs in the paper cassette Straighten the tabs on the front corners of the tray or replace the cassette Pickup roller is worn or damaged Replace the pickup roller Feed roller is dirty worn or damaged Clean the feed roller If it is still dirty after cleaning or if it is worn or damaged replace the feed roller Drive gears are damaged Check the drive gears in the paper pickup unit Replace the pickup drive assembly if the gears are damaged Connector to the printer has poor contact Reconnect all connectors to the printer Replace any damaged connectors Paper feeder pickup solenoid is damaged Pickup motor is defective 1 Disconnect the connector J4006 for the paper feeder solenoid from the paper feeder PCB 2 Measure the resistance between the cable side connectors J4006 2 and J4006 1 3 If the measured resistance is NOT about 160 ohms replace the paper feeder pickup solenoid Replace the paper pickup drive assembly Paper feeder PCB is defective Replace the paper feeder PCB Paper pickup assembly is defective Replace the paper pickup assembly DC controller PCB is defective Replace the DC controller PCB Calibrate the printer after replacing the DC controller CLJ 4600 5500 jams in the paper path Table 3 9 Causes for jams in the paper path CLJ 4600 5500 Issue Solution
62. 00 sheet input tray Event log message 13 11 1 lt x gt lt x gt Description 1 Timeout at the paper entry sensor PS31 B Timeout at the paper exit sensor PS32 1 Open the vertical transfer unit VTU and remove any media 2 Verify that the paper entry sensor PS31 moves freely 3 Verify that the feed separation and pickup rollers are properly seated 4 lf the problem persists open the VTU and override the VTU closed sensor PS35 Perform a paper path test from the 2 000 sheet input unit and verify that the feed rollers are advancing the paper If rollers do not rotate check the connections at the pickup assembly and the controller PCA in the 2 000 sheet input unit 5 If the rollers rotate and drop down but do not advance the paper replace the feed and separation rollers by using the maintenance kit 6 If the rollers do not rotate or do not drop down replace the pickup assembly 7 Ifthe problem persists replace the VTU which includes PS31 ENWW Troubleshooting control panel messages 53 Table 2 13 Alphabetical printer messages continued Message Description Action Check the event log message These instructions are for event log message There is a jam in the 2 000 sheet input tray Event log message 13 11 2 lt x gt X description 1 Page stays too long at the paper entry sensor PS31 B Page stays too long at the paper exit sens
63. 00dn C9657A CLJ 5500dtn C9658A CLJ 5500htn C9659A CLJ 8500 C3983A 60 000 C7096 90986 CLJ 8500n C3984A CLJ 8500dn C3985A CLJ 8550 C7096A 60 000 C7096 90986 CLJ 8550n C7097A CLJ 8550dn_ C7098A CLJ 8550gn_ C7099A CLJ 8550mfp C7834A ENWW Contents ENWW 1 Control panel Using the control panel 2 2 00 ee eee 2 Control panel layouts 0c eee eee eee 2 Setting the control panel display language 6 Upgrading the firmware ccc eee 8 Using Internet Explorer for flashable firmware 9 Using HP Web Jetadmin 00 00 ee eee 9 Using a manual download for parallel connections 10 Using FTP maka ne KAB lads edge aw ne ade AA 10 2 Service and troubleshooting Troubleshooting 00 cece eee ee 15 Pre troubleshooting checklist 2 220055 16 Basic troubleshooting 0 0 00 cee eee te eae 19 Environmental specifications 00 00 aa 22 Printing information pages cece es 26 Configuration page 0 6 0 aaea 26 Demonstration page 0 e eee eee 28 Monu Mapa maana KG BRA Ee bade beds oe Exe 30 EV6NUIOG etic aka Ree tae eet ae Peete eae a tad 31 Supplies Status page a 32 Troubleshooting control panel messages 34 CLJ 2500 control panel light messages 34 Alphabetical printer messages cee eae 49 Nume
64. 1 Control panel ENWW CLJ 4500 4550 control panel layout 00 a LY 1 si O Figure 1 2 Control panel layout CLJ 4500 4550 1 Control panel display 6 Attention light 2 Ready light 7 MENU button 3 Data light 8 ITEM button 4 GO button 9 VALUE button 5 CANCEL JOB button 10 SELECT button Rocker buttons ENWW Using the control panel 3 CLJ 4600 5500 control panel layout Figure 1 3 Control panel layout CLJ 4600 5500 1 PAUSE RESUME button 6 Help button 2 CANCEL JOB button 7 Back arrow button 3 Ready light 8 Down arrow button 4 Data light 9 SELECT button 5 Attention light 10 Up arrow button 11 Control panel display 4 Chapter 1 Control panel ENWW CLJ 8500 8550 control panel layout Figure 1 4 Control panel layout CLJ 8500 8550 1 Go button 6 SELECT button 2 MENU button 7 Aitention amber light 3 Control panel display 8 Data green light 4 VALUE button 9 Ready green light 5 CANCEL JOB button 10 ITEM button ENWW Using the control panel 5 Setting the control panel display language Note This section only applies to those products that have a control panel display Product Procedure This is not supported for this product 1 Pres
65. 3 is faulty This error occurs when the sensor output is 2 3 V or more in the absence of paper 174 Chapter 2 Service and troubleshooting ENWW E545 E546 CLJ 8550mfp The error shown on the touch screen display is in the output device Note Output devices are not supported on the LJ8550 MFP This error indicates that the bin flapper 1 for E545 or bin flapper 2 for E546 of the sorter H1 is faulty These errors occur when the bin flapper solenoid sensor P112 does not detect solenoid operation even when the solenoid SL3 for E545 or SL4 for E546 is driven during initialization or face down delivery This error can also occur when the bin flapper sensor remains on even when the solenoid has stopped operation E677 E678 E679 CLJ 8550mfp E677 indicates that an error has occurred during the initial communication between the ACC controller PCB and an accessory The error occurs when the ACC controller PCB and the accessory are not ready for communication within four seconds possibly due to a problem in the power supply or when an initial communication error with each accessory has occurred E678 indicates that the communication between the ACC controller PCB and an accessory has been interrupted The error occurs when the accessory is turned off in the middle of communication or when the cable of the accessory has been disconnected in the middle of communication E679 indicates that an error has occurred in the protocol used f
66. 8 seconds overhead transparency mode e 9 6 seconds high gloss mode Fusing delivery stationary jam The media has not passed through the fusing delivery sensor PS1903 after PS1903 detects the leading edge of the media within approximately e 2 4 seconds normal mode letter sized media landscape e 9 6 seconds overhead transparency mode letter sized media landscape e 7 2 seconds high gloss mode letter sized media landscape e 4 2 seconds normal mode 11 by 17 inch sized media e 17 0 seconds overhead transparency mode 1 1 by 17 inch sized media e 12 7 seconds high gloss mode 11 by 17 inch sized media Fusing unit paper coil jam The fusing delivery sensor PS1903 does not detect the media for the specified time or longer within 0 2 to 1 2 seconds after PS1903 detects the leading edge of the media within approximately e 0 8 seconds normal mode 3 2 seconds overhead transparency mode e 2 4 seconds high gloss mode ENWW Jams 227 Table 3 5 Jam detection CLJ 8500 8550 continued Issue Cause Top face down output bin delivery delay media jam The media has not reached the top face down output bin delivery sensor PS11 within the specified time after the fusing delivery sensor PS1903 detects the media e about 4 0 seconds normal mode e about 16 0 seconds overhead transparency mode e about 12 0 seconds high gloss mode Top face down tray delivery s
67. 98 CLJ 8550mfp E196 The EEPROM IC212 on the dc controller has an error E197 A machine internal communication error occurs more than once Or the reception interruption on the dc controller side does not occur for a specific time for internal communication E198 The IC on the dc controller has an error Table 2 30 Cause and solutions for E196 E197 E198 errors Cause Issue Solution de controller Turn the copier off and then Replace the dc PCB on Is the problem corrected controller PCB 166 Chapter 2 Service and troubleshooting ENWW E202 CLJ 8550mfp The scanner home position is not detected This error occurs when the scanner does not return to the home position when it has been started In response to this code the control panel keys will lock and the Wait message will appear This code is indicated only on the Error History screen in service mode Table 2 31 Cause and solutions for E202 error Cause Issue Solution Is the scanner at home position when See the CLJ 8550 mfp service E202 is indicated manual Original Does J1609A 2 on the reader Check the wiring from the scanner controller PCB generate 5 vdc when reader controller PCB to home the scanner is at PS101 PS101 if normal replace position PS101 sensor PS101 Wiring Is there any fault in the wiring or Connect the wiring correctly connectors from J1605 on the reader controller PCB
68. B PCB ENWW Troubleshooting control panel messages 169 E216 E219 CLJ 8550mfp E216 The scanning lamp fluorescent lamp fails to turn on when the power has been turned off and then on This error occurs when the intensity sensor does not detect light from the scanning lamp in 15 seconds E219 The scanning lamp fluorescent lamp has reached the end of its life This error occurs when the thermistor of the scanning lamp detects a temperature of 150 C or more while the scanning lamp is on Table 2 34 Cause and solutions for E216 E219 errors Cause Issue Solution Fluorescent Replace the fluorescent lamp Is the End lamp problem corrected Inverter PCB Replace the inverter PCB Is the Replace the reader controller Reader problem corrected PCB controller PCB E217 CLJ 8550mfp The temperature does not exceed the setting when the lamp heater is powered for three minutes or more while the scanning lamp heater is going through constant temperature control Table 2 35 Cause and solutions for E217 error Cause Issue Solution Lamp heater Replace the lamp heater Is the Replace the reader controller reader problem corrected PCB controller PCB 170 Chapter 2 Service and troubleshooting ENWW E218 CLJ 8550mfp The scanning lamp fluorescent lamp is absent or the inverter PCB copy module is faulty This error occurs when activation is attempted and the scanning la
69. Firmware DIMM I O card INIO AIAI OIN 266 Chapter 5 Illustrations ENWW CLJ 4600 major components SIN Re N ENG Figure 5 11 CLJ 4600 assembly location diagram pb Reference CLJ 4600 Component Reference CLJ 4600 Component 1 Fuser drive assembly 9 Paper pickup assembly Drum drive assy blk 10 ETB assembly Drum drive assy c m 11 Fuser assembly Drum drive assy y Drum drive assy c m Disengaging drive assy Paper pickup drive assy XN IN D JO B O N ENWW Cassette Major components 267 Figure 5 12 CLJ 4600 location of switches Reference CLJ 4600 Component Swi cassette paper size detection switch sw2 cassette paper size detection switch SW3 cassette paper size detection switch SW4 door switch shown in the photo below SW5 on off switch SW1001 test print switch 268 Chapter 5 Illustrations ENWW Figure 5 13 CLJ 4600 location of sensors SL2 SL1 Na HE Figure 5 14 CLJ 4600 location of solenoids Reference CLJ 4600 Component SL1 cassette pickup solenoid paper pickup drive assembly SL2 multi purpose tray pickup solenoid paper pickup drive assembly ENWW Major components 269 Figure 5 15 CLJ 4600 PCB locations Reference CLJ 4600 Component 1 I O daughter card Fir
70. LJ 4500 4550 204 errors 115 117 Rotate button CLJ 2500 2 36 cartridges carousel errors 115 117 developer test CLJ 4500 4550 204 error messages 92 life expectancies 241 lock toner lever message 82 non HP 83 replacing customer responsibilities 15 status lights 2 status page printing 32 toner out message 88 troubleshooting 74 checklist pre troubleshooting 16 checks See tests circuit capacity specifications 23 cleaning page printing 240 CLJ 2500 accessory error messages 42 assemblies illustrations 256 Attention with Ability to Continue messages 39 control panel lights and buttons 2 jams clearing 218 language selection not supported 6 lights status 34 motors and fans 258 paper path test 215 PCAs 259 power on sequences 283 sensors and switches 257 service error messages 46 Service menu 186 service mode accessing 183 Index 291 CLJ 4500 4550 assemblies illustrations 260 clutches 264 color calibration 245 control panel lights and buttons 3 diagnostics mode 200 drum test 242 jams clearing 221 language setting 6 motors and fans 265 paper path test 216 PCBs 266 registration setting 197 sensors 262 Service menu 187 service mode accessing 184 solenoids 264 CLJ 4600 assemblies illustrations 267 calibration 193 color calibration 247 control panel lights and buttons 4 jams clearing 223 jams troubleshooting persistent 229 language setting 6 paper path test 216 PCBs 270 power on sequences 284 sensors 269
71. T and J220 B5 GND on the controller board after the printer is turned on If the voltage changes to about 3 5 V from 0 V replace the carousel motor PCA ENWW Troubleshooting control panel messages 119 Table 2 14 Numerical error messages continued Message Description Action CLJ 4500 4550 The printer is not receiving data back from the density sensor PS14 located in the bottom of the imaging drum drawer 1 Verify that the densitometer is clean perform the toner density sensor cleaning procedure in chapter 7 of the online user guide 2 Inspect the density sensor wiring harness for damage The harness runs from the density sensor through the left side upper control arm of the imaging drum drawer to J1010 of the DC controller PCB Verify that the cable is firmly seated into the J1010 of the DC controller PCB 3 If the error persists replace the density sensor assembly CLJ 8500 8550 The process marks in the density sensing pattern are corrupted Press GO N Print a configuration page and troubleshoot the error as an image quality problem 3 Check the transfer guide for cracks and replace the transfer guide as needed CLJ 4500 4550 The optional equipment is not recognized Turn the printer off and then on to reset the printer CLJ 8500 8550 The waste toner sensor has failed Printing cannot continue 1 Re
72. Turn the printer off and do not operate the printer in this condition to prevent serious damage 1 Turn the printer off and on to reset it 2 Reconnect connectors J645 and J647 on the main relay PCA J18 and J74 relay connectors and connector J227 on the controller board 3 Reconnect connector J641 on the main relay PCA and connector J102 on the power supply 4 Measure the voltage across J645 3 FAN3ON and J645 1 GND on the main relay PCA after the printer is turned on If the voltage changes from 0 V to 24 V replace fan 3 5 Measure the voltage across connector J641 1 24 VB and J641 4 GND on the main relay PCA after the printer is turned on If the voltage is not 24 V replace the main relay PCA 6 Ifthe error persists replace the controller board 132 Chapter 2 Service and troubleshooting ENWW Table 2 14 Numerical error messages continued Message Description Action Pao FRM FAILU 7 Measure the voltage CLJ 8500 8550 across connector J641 1 continued 24 VB and J641 4 GND on the main relay PCA after the printer is turned on If the voltage is not 24 V replace the main relay PCA 8 Check the ac power supply 9 Ifthe problem is not corrected after the printer is turned off and on again find the cause of activation of the overcurrent overvoltage detection circuit in the power supply Wait more than two minutes before turning the printer on again
73. VRAM test must be aborted use the CANCEL JOB key EXECUTE Runs the selected tests TESTS 202 Chapter 2 Service and troubleshooting ENWW Engine diagnostics CLJ 4500 4550 A good understanding of how the printer operates is required to use the engine diagnostics successfully To have a better view of the areas being exercised remove the left side cover and the ITB drawer Defeat the two ITB drawer switches located on the left side of the drawer cavity Listed below are the diagnostics available and a brief description of what the diagnostic will do _ Table 2 57 Engine diagnostics CLJ 4500 4550 Menu item Description Continuous Selected test will run once Selected test will run in a continuous loop In the 4550 series only CANCEL JOB will abort the test Turns on the motors that control the paper path section of the printer In the 4550 series only CANCEL JOB will abort the test Paper Path Rotates the carousel and the developers In the 4550 series only Test CANCEL JOB will abort the test Developer Turns on the drum drive motor that drives the drum and ITB In the 4550 Test series only CANCEL JOB will abort the test Drum Test Displays the state for each of the paper path sensors and switches In the 4550 series only this test will continue running until the CANCEL JOB key is pressed Path Displays the state for each of the door and drawer switches In the 4550 Sensors se
74. W 13 Figure 5 18 CLJ 5500 location of sensors Reference CLJ 5500 component e output bin full sensor PS6 fuser delivery sensor PS7 fuser paper sensor PS8 cartridge home position sensors PS1 PS2 PS3 PS4 developing disengaging sensor PS5 paper stack surface sensor PS902 cassette paper sensor PS901 horizontal registration transparency sensor S1 DO ON OO oO AJOIN top of page sensor PS801 pani o multi purpose tray paper sensor PS802 pickup sensor PS9 ETB speed sensor PS10 HIN M n oo paper feed sensor PS903 ENWW Major components 273 EY Figure 5 19 CLJ 5500 location of solenoid and clutch Reference CLJ 5500 component 1 multi purpose tray pickup solenoid SL1 2 cassette pickup clutch CL1 274 Chapter 5 Illustrations ENWW FM2 FM3 M5 Figure 5 20 CLJ 5500 location of motors and fans Reference CLJ 5500 component Reference CLJ 5500 component M1 cyan drum motor M6 ETB motor M2 yellow drum motor PM1 developing disengaging motor M3 magenta drum motor PM2 pickup motor M4 black drum motor PM3 lifter motor M5 fuser motor FM1 power supply fan FM2 formatter fan FM3 cartridge fan ENWW Major components 275 Figure 5 21 CLJ 5500 PCB locations Ref
75. ad the light messages in Table 2 10 Printer Status light messages for CLJ 2500 Table 2 9 Conirol Panel lights CLJ 2500 Light Description Cc Light is off CD Attention light amber is on a AE Attention light amber is blinking SOD Ready light green is on gt Go light green is on i SI Ready light green is blinking TUD Go light green is blinking 34 Chapter 2 Service and troubleshooting ENWW Table 2 10 Printer Status light messages CLJ 2500 Message Description Solution All control panel The printer is in Startup Pressing buttons has no effect until the lights cycle one state printer is in the Ready state after another The printer is in Ready No action is needed state Pressing GO prints a Demo page e Pressing GO and CANCEL JOB O simultaneously prints a Configuration Je page and a Supplies Status page as well as an HP Jetdirect page if an HP Jetdirect print server card is installed The printer is receiving Pressing CANCEL JOB cancels the 0 or processing data current job One or two pages might print as the printer clears the print job The NO printer returns to the Ready state Ready O light on after the job has been canceled ep ENWW Troubleshooting control panel messages 35 Table 2 10 Printer Status light messages CLJ 2500 continued Message Description Solution Attention error The Close the top
76. alibration density settings CLJ 4500 and CLJ 4550 only Contains on the bottom row of text four separate blocks of numbers The first block is for cyan second for magenta third for yellow and the last is for black If the numbers are near zero no calibration was done e Consumables of Life Remaining CLJ 8500 and CLJ 8550 only Lists the percentage of the maximum rated life remaining for the transfer kit fuser kit and drum kit e Color Adjust CLJ 8500 and CLJ 8550 only Lists the number of pages since the last manual color adjustment 26 Chapter 2 Service and troubleshooting ENWW To print a configuration page Table 2 4 Printing a configuration page Product Instructions CLJ 2500 Press GO and CANCEL JOB simultaneously The Supplies Status page also prints If you have an HP Jetdirect print server card installed the HP Jetdirect page listing the HP Jetdirect information prints as well Note You can also print a configuration page in the embedded Web server or from the HP Color LaserJet 2500 Series Toolbox CLJ 4500 Press MENU until appears on the CLJ 4550 printer control panel display Press ITEM until i 4 appears on the display 3 Press SELECT to print the configuration page Note If the printer is configured with ElO cards for example an HP JetDirect Print Server an additional configuration page will print that provides interface configuration information CLJ 4600 Press SELECT to enter the CLJ 5500
77. and then press the engine test switch Note The formatter must be connected to the ECU to perform an engine test Otherwise the printer does not print the engine test The engine test button is accessed through a small hole on the side of the printer Note The engine test does not print from tray 1 For the printer to perform an engine test tray 2 or tray 3 must be installed and loaded with paper and the print cartridge must be installed in the printer The engine test button is accessed through a small hole on the side of the printer The CLJ 8500 8550 do not support this function ENWW Engine test 199 Diagnostics mode CLJ 4500 4550 This section provides an overview of the diagnostic tools incorporated into the HP Color LaserJet 4500 series and 4550 series printers CAUTION Use caution when performing printer diagnostics to avoid risk of injury Only trained service personnel should access the diagnostic mode with the skins removed There are two diagnostic sections built into the firmware one for the formatter and the other for the engine Each section contains different tests that allow the service technician to verify printer functionality While in diagnostic mode there are no error messages associated with these tests Therefore determination of the problem will rely on the technicians skill To exit diagnostic mode turn the printer off Note In the 4550 series you can abort a test run by pressing
78. are connected Turn the printer off and on to reset the printer Verify that no objects or paper are stored in the left side of the tray Verify that the lifting plate moves freely by hand Verify that the paper size plates are installed correctly and that they are not bent If the error persists replace the paper deck drive assembly bushing If the error persists replace the paper deck drive assembly If the error persists replace the paper tray tray 4 for the 2 000 sheet input unit 146 Chapter 2 Service and troubleshooting ENWW Table 2 14 Numerical error messages continued Message Description Action CLJ 8500 8550 A 2 000 sheet input unit feed motor error exists 1 Verify that the C link and power cables are connected Turn the printer off and on to reset the printer Verify that there are no objects in the left side of the tray Verify that the paper tray raised sensor P534 is working properly perform a sensor test Check for proper installation of the pick up roller Check the pick up assembly and the paper deck drive assembly cabling If the error persists replace the pick up assembly If the error persists replace the paper deck drive assembly ENWW Troubleshooting control panel messages 147 Table 2 14 Numerical error messages continued Message Description Action CLJ 8500 8550
79. ary charging roller media attaching roller fuser delivery roller 39 mm 1 5 inches Toner feed roller 44 mm 1 7 inches cassette feed sub roller 49 mm 1 9 inches face down delivery roller 54 mm 2 1 inches cassette feed roller registration roller 57 mm 2 2 inches registration sub roller 63 mm 2 5 inches Fuser pressure roller 75 mm 2 9 inches Photosensitive drum or transfer roller center to center distance 94 mm 3 7 inches photosensitive drum 107 mm 4 2 inches Fuser sleeve CLJ 5500 14 mm 0 5 inches Toner charging roller 36 mm 1 4 inche Developing cylinder s s Fuser delivery roller 38 mm 1 5 inches 41 mm 1 6 inches Print cartridge Output bin delivery roller 43 mm 1 7 inches Toner feed roller 44 mm 1 7 inches Transfer media attaching roller 53 mm 2 0 inches Registration roller Sub registration roller 79 mm 3 0 inches Fuser pressure roller 82 mm 8 2 inches Transfer roller 63 mm 2 5 inches 94 mm 8 7 inches Photosensitive drum Cassette feed roller Cassette separation roller 107 mm 4 2 inches 252 Chapter 4 Print quality Fuser sleeve ENWW Table 4 5 Repetitive defects continued CLJ 8500 8550 38mm 1 5 inches Color developer roller 44 mm 1 7 inches Charging roller
80. ath such as a loose shutter or disengaged print cartridge In very rare circumstances this error can be caused by a broken gear on the rear of the carousel assembly or a broken position flag on the carousel gear 1 Turn the printer off and on to reset the printer Open the carousel door and waste toner tray Look for an obstruction such as a print cartridge shutter catching on the waste toner tray Verify that the toner lock lever is fully locked If the message does not clear after closing the doors turn the printer off and on to reset the printer Clean the carousel position sensor PS3 by using compressed air If the problem persists replace the sensor Reconnect connector J701 on carousel motor PCA connectors J641 J642 J644 and J648 on the main relay PCA connector J672 on the subrelay PCA and connector J102 on the power supply Check operation of the carousel stopper arm Replace the carousel stopper solenoid if necessary If the error persists replace the carousel motor M1 If the error persists replace the controller board ENWW Troubleshooting control panel messages 117 Table 2 14 Numerical error messages continued Message Description Action CLJ 8500 8550 continued 8 10 Check the electrical continuity between connector J641 1 24 VB and J642 3 PMP on the main relay PCA when the door switch SW641 is turned on If
81. being used does not meet HP specifications See the user guide for information about print media specifications The environment in which the paper was stored is too humid or too dry See the user guide for information about print media storage specifications Non HP supplies are installed in the printer Jams can occur in these locations Inside the printer In input areas In output areas Find and remove the jam by using the instructions on the following pages If the location of the jam is not obvious look first inside the printer Loose toner might remain in the printer after a jam This problem should resolve itself after a few sheets have been printed 218 Chapter 3 Jams ENWW CLJ 2500 to clear jams from inside the printer CAUTION 1 Jams in this area might result in loose toner on the page If you get toner on your clothes or hands wash them in cold water Hot water will set the toner into the fabric Open the top cover 2 Remove the imaging drum by pushing it away from you and lifting it out of the printer Note You cannot reach jams by removing the print cartridges Complete one of these steps If the leading edge or the trailing edge of the paper is visible carefully pull the paper out of the printer If the paper is too difficult to remove remove the jam as described in CLJ 2500 to clear jams from output areas on page 220 4 After the jam has been removed replace the imaging drum and c
82. cams turn and if both the drum drive gear and the ITB drive gear is rotating Path sensors CLJ 4500 4550 The path sensors test allows the paper path sensors and switches to be tested for correct operation The table below shows the correlation between the identifier on the front panel and the sensor or switch it represents Table 2 58 Paper path sensors and switches CLJ 4500 4550 Name Description PS8 Tray 2 paper detect sensor PS3 Tray 1 last piece of media pulled sensor PS4 Tray 1 paper detect sensor SW801 Tray 2 paper size switch 2 SW802 Tray 2 paper size switch 1 SW803 _ Tray 2 paper size switch 0 PS3001 Optional Tray 3 paper detect sensor SW3001 Optional Tray 3 paper size switch 2 SW3002 Optional Tray 3 paper size switch 1 SW3003 Optional Tray 3 paper size switch 0 PS10 Carousel position sensor PS11 N A N A 500 sheet feeder 1 installed O uninstalled PS9 Top output tray full sensor ENWW Diagnostics mode CLJ 4500 4550 205 1 Press the ITEM key until panel is displayed on the front 2 Press the SELECT key to activate the test The front panel will display A through N with a binary value below it When running this test make sure the ITB drawer is installed with Tray 2 and Tray 3 if installed removed In this state the default value on the front panel should be 0X111111110010 where the x can be either 0 or 1 If there is any other
83. cect ae 183 To gain access to the service mode eee eee es 183 Service menu iteMS 1 0 0 0 cee 186 NVRAM Initialization 0 0 0 eee 190 To perform NVRAM initialization 2 2 2 eee 190 Hard disk initialization 2 2 0 tees 192 Calibration bypass CLJ 4600 and CLJ 5500 only 193 Calibrate Now CLJ 4600 and CLJ 5500 only 2 04 193 Cold ReSet sa iaaa E a i E a E A a aa E EA E EA 194 Registration page s r ees oe neers NANG Ma wean ale coe en Be 196 Setting registration numbers CLJ 4500 and CLJ 4550 only 197 ENWW 13 Setting margin numbers CLJ 4500 4550 only 05 197 Engine AA PP 199 Diagnostics mode CLJ 4500 4550 cee 200 Gaining access to the diagnostics mode 201 Engine diagnostics CLJ 4500 4550 n naasa aaa 203 Developer test CLJ 4500 4550 2 00 c cee eee 204 Drum test CLJ 4500 4550 anaana 205 Path sensors CLJ 4500 4550 eee 205 Path sensors CLJ 2500 4600 5500 8500 8550 aaa 206 Door sensor test CLJ 4500 4550 6 2 aaa 206 Door sensor test CLJ 8500 8550 2 000 sheet input unit 208 Troubleshooting printer accessories CLJ 8500 8550 209 Service LED descriptions 0 0 cc cece eee 210 Service LED interpretation CLJ 8500 8550 005 211 14 Chapter 2 Service and troubleshooting ENWW Troubleshooting
84. close the clear and front doors 82 Chapter 2 Service and troubleshooting ENWW Table 2 13 Alphabetical printer messages continued Message Description Action Communication with the multi bin mailbox has been lost 1 Verify that all cables are connected correctly 2 Turn the printer off and on to reset the printer A new cartridge has been installed that is not made by HP This message continues to appear until an HP cartridge is installed or CANCEL JOB is pressed If you believe the cartridge is an HP cartridge please call the HP fraud hotline at 1 877 219 3183 Any printer repair required as a result of using non HP cartridges is not covered under HP warranty To continue printing press CANCEL JOB The first pending job will be cancelled alternates with The printer has detected that a non HP print cartridge is currently installed If you believe the cartridge is an HP cartridge please call the HP fraud hotline at 1 877 219 3183 Any printer repair required as a result of using non HP cartridges is not covered under HP warranty The printer personality for the current job could not be run in the available memory The job was canceled and no pages were printed 1 Reprint the job If the message persists turn the printer off and on to reset the printer before sending the print job again 2 Install more printer memory For m
85. connections on page 10 Using FTP on page 10 8 Chapter 1 Control panel ENWW Using Internet Explorer for flashable firmware This procedure describes how to upgrade a single printer by using a Web browser and file transfer protocol FTP works with Internet Explorer 5 x and later 1 Before you can use Internet Explorer as an FTP client you need to change a browse setting a In Internet Explorer on the Tool menu click Internet Options b On the Advanced tab select the Enable folder view for FTP sites check box and then click OK Download the firmware image file from the HP website www hp com The firmware image file is located on the Driver Download page for each specific printer model Locate the downloaded file on your computer and run the exe file to extract the downloaded files The following example uses the HP LaserJet 9000 printer as an example Two files are created in a folder named Ij9000 rfu which is the new firmware file and a README file which explains how to download it to the printer The following instructions are taken from this readme file 5 Open a Windows Explorer window and browse to the folder that contains the rfu file 6 Inthe URL address text box type the letters FTP type the IP address of the printer and then press Enter on the keyboard For example type FTP 192 168 0 1 A folder named Port 1 in appears in the browser window Drag the rfu file from the Windows E
86. connectors J10 for the power supply fan cartridge fan and J1102 on the DC controller PCB 2 Immediately after starting the print operation measure the voltage between pins 1 and 3 on the J10 connector If the voltage changes from 0 V to 12 V or 24 V replace the cartridge fan 3 If the error persists replace the DC controller PCB Calibrate the printer after replacing the DC controller See Calibrate Now CLJ 4600 and CLJ 5500 only on page 193 57 4 Formatter fan FM2 1 Reconnect the connectors J11 for the formatter fan and J1102 on the DC controller PCB 2 Immediately after turning the printer on measure the voltage between pins 4 and 6 on the J1102 connector If the voltage changes from 0 V to 12 V or 24 V replace the formatter fan ENWW Troubleshooting control panel messages 135 Table 2 14 Numerical error messages continued Message Description Action CLJ 5500 continued 57 7 Power supply fan FM2 1 Reconnect the connectors J1104 and J1133 on the DC controller PCB 2 Disconnect the connector J1133 3 Immediately after turning the printer on measure the voltage between pins 1 and 3 on the J1133 connector If the voltage changes from O Vto 12 Vor 24 V replace the power supply fan 4 Ifthe error persists replace the low voltage power supply 5 If the error persists replace the DC controller PCB Calibrate the printer after replaci
87. control panel messages 157 Table 2 18 Cause and solutions for E009 error continued Connectors Are connector J222 on the dc Connect the connectors controller PCB and connector J26 of Replace the dc controller PCB the fusing assembly connected securely E010 E011 CLJ 8550mfp E010 The main motor start up is faulty This error occurs when the revolution of the main motor fails to reach a specific value E011 The main motor rotation is faulty This error occurs when the revolution of the main motor fails to reach a specific value Table 2 19 Cause and solutions for E010 E011 errors Cause Issue Solution Connector Are connector J219 on the dc Connect the connectors securely controller PCB and the relay connector J1 connected securely Main motor Does the voltage change from about 5 Replace the main motor to 0 V between connector J219 4 Replace the dc controller PCB MON on the dc controller PCB and connector J219 5 GND when the power is turned on E013 CLJ 8550mfp A specific number of copies have been made after the waste toner case full warning has been issued DISPLAY gt SENSOR gt W TONER Table 2 20 Cause and solutions for E013 error Cause Issue Solution Waste toner Is the photosensitive drum cartridge Replace the photosensitive drum case full of waste toner cartridge Replace the dc controller PCB 158 Chapter 2 Ser
88. cover top cover is open Attention error The printer has a jam ETA Attention error The Load media US printer is out of media Oo 1 Clear the jam see pages See CLJ 2500 jams on page 218 2 Ifthe location of the jam is not apparent check the embedded Web s erver to find the jam location If the jam was under the imaging drum toggle the registration sensor to check its movement and replace the registration sensor if it does not move freely If the jam was in the fuser area toggle the fuser exit sensor to check its movement and replace the fuser exit sensor if it does not move freely e The top cover has been opened and then closed D e You pressed Oo ROTATE CAROUSEL Pressing GO returns the printer to the Ready state If you do not press Go the printer automatically returns to the Ready state after approximately 10 seconds Pressing ROTATE CAROUSEL brings another print cartridge to the top position 36 Chapter 2 Service and troubleshooting ENWW Table 2 10 Printer Status light messages CLJ 2500 continued printing the first side of a Message Description Solution A manual feed job was 1 Load media into tray 1 Ha nt to Ni apa ae 2 Ifthe printer does not begin printing As T prin ae oi Ha after the pages have been reloaded a C Specia meala press GO Or just press GO to try to Oo print from another tray if another tray is a installe
89. ctrical continuity exists replace the main relay PCA ENWW Troubleshooting control panel messages 137 Table 2 14 Numerical error messages continued Message Description Action 6 Check electrical continuity between CLJ 8500 8550 connector J671 2 PMP continued and J671 2 PFUPR on the subrelay PCA when the door switch SW671 is turned on If no electrical continuity exists replace the subrelay PCA 7 Measure the voltage across connector J647 B11 24 UH and J647 4 GND on the main relay PCA after the printer is turned on If the voltage is not 24 V replace the main relay PCA 8 If the error persists replace the controller board 138 Chapter 2 Service and troubleshooting ENWW Table 2 14 Numerical error messages continued Message Description Action alternates with CLJ 4600 CLJ 8500 8550 A printer motor error has occurred X Description motor error motor startup error motor rotation error fuser motor startup error fuser motor rotation error print cartridge motor startup error 6 print cartridge motor rotation error 9 ETB motor startup error A ETB motor rotation error B developing disengaging motor startup error C developing disengaging motor rotation error OKOIN O Y Description 0 no color K black C cyan M magenta Y yellow 1 Turn the printer off and then on 2 This message might also appear if the
90. d The printer has finished 1 Reload the pages i duslexiob and 2 Ifthe printer does not begin printing manua ee an after the pages have been reloaded the printer is waiting for press GO the pages to be reloaded so it can print the second side Someone is trying to e Add paper to the selected tray to print print by Source tray and there is no paper in the selected tray from it Press GO to try to print from another tray The print image is larger than the size of media in the tray Load the correct size media and press Go The printer has an Attention with Ability to Continue error Press GO for the printer to attempt to recover from the error and print whatever data it can If successful the printer completes the job while the Ready light blinks If unsuccessful the Attention with Ability to Continue message continues to appear Perform one of these steps e Press and hold GO and CANCEL JOB simultaneously to see a secondary light pattern See Attention with Ability to Continue secondary messages CLJ 2500 on page 39 Press CANCEL JOB to cancel the print job If the problem has been resolved the printer returns to the Ready state Ready light on ENWW Troubleshooting control panel messages 37 Table 2 10 Printer Status light messages CLJ 2500 continued Message Description Solution Accessory error An Press and hold GO and CANCEL JOB error has occurred
91. d remove the fuser Measure the resistance across fuser connectors J26F A4 FXTHU and J26F A3 GND If it is not in the range of 250 kOhms to 600 kOhms room temperature check the wiring from the connector J222 on the controller board up to the upper thermistor If the wiring is normal replace the fuser kit If the error persists reconnect connector J222 on the controller board and connector J26 on the fuser If the error persists replace the fuser kit If the error persists replace the power supply 104 Chapter 2 Service and troubleshooting ENWW Table 2 14 Numerical error messages continued Message Description Action CLJ 8500 8550 A warm up error has occurred in the fuser 1 Turn the printer off and on to reset the printer Verify that the fuser is completely seated inside the printer Check for media jams in the fuser If the error persists replace the fuser kit CLJ 8500 8550 A high temperature error has occurred in the fuser The controller board saves this error through an electrical charge in capacitor C259 Turn the printer off and then on to reset the printer 2 Turn the printer off and unplug it Place a flat blade of a screwdriver between the two wires of C259 to short out the capacitor and clear the memory If the error persists replace the fuser kit If the error persists replace the power sup
92. d color checks Use the configuration page to check the print density of the black primary and process color levels Solid black and color filled areas on the configuration page demonstrate the ability to print at full density In addition to the items listed above the configuration page provides the following information e It helps isolate the problem to the software or the product e It shows that all colors print The following media related items are responsible for many image formation and print quality defects e rough paper e heavy paper e transparencies out of the specified thickness range e paper that has absorbed too much moisture from the atmosphere e room environment humidity too high or low Understanding color variations The printed output might not match the computer screen and the colors printed on successive pages might not match While color variations are inherent in this printing method they can indicate changes in the printing environment print media or product components ENWW Image quality 243 Common causes of color variation The following list outlines the major causes of color variations between computers applications and output devices e Halftone patterns produced on monitors and the types of patterns used in the print jobs are different and might cause variations in the printed output e The printed output differs from the image on the monitor because the monitor and the print media ha
93. dy Ready light on and is not printing You can also view this page from the HP Color LaserJet 2500 Series Toolbox 1 Press MENU until I iappears on the printer control panel display Press ITEM until F 2 appears on the display Press SELECT to print the demonstration page 28 Chapter 2 Service and troubleshooting ENWW Table 2 5 Printing a demonstration page Product Instructions CLJ 4600 1 Press SELECT to enter the CLJ 5500 2 Press DOWN ARROW to highlight 3 Press SELECT to select 4 Press DOWN ARROW to highlight 5 Press SELECT to select CLJ 8500 1 Press MENU until 24 appears on the CLJ 8550 printer control panel display 2 Press ITEM until F appears on the display 3 Press SELECT to print the page ENWW Printing information pages 29 Menu map Use the menu map to navigate through control panel menus To print a menu map Table 2 6 Printing a menu map Product Instructions The CLJ 2500 does not have a control panel Note For information about menu items found in the embedded web server see hp embedded web server for hp LaserJet printers and mips Press MENU until 1 appears on the printer control panel display Press ITEM until r appears on the display Press SELECT to print the menu map Press SELECT to enter the Press DOWN ARROW to highlight Press SELECT to select 7 Press DOWN ARROW to highlight Press SELECT to select ala A WO N 0 N Press MENU t
94. e connectors J18 for the fuser motor and J1101 on the DC controller PCB Replace any damaged parts 2 Ifthe error persists replace the fuser drive assembly 3 If the error persists replace the DC controller PCB Calibrate the printer after replacing the DC controller See Calibrate Now CLJ 4600 and CLJ 5500 only on page 193 Print cartridge motor error 1 Reconnect the print cartridge connector on the DC controller PCB J1124 for cyan J1126 for magenta J1125 for yellow and J1127 for black 142 Chapter 2 Service and troubleshooting ENWW Table 2 14 Numerical error messages continued Message Description Action alternates with CLJ 4600 CLJ 8500 8550 continued 2 Ifthe error persists replace the drum drive assembly for the indicated print cartridge 3 If the error persists replace the DC controller PCB Calibrate the printer after replacing the DC controller See Calibrate Now CLJ 4600 and CLJ 5500 only on page 193 Developing disengaging motor error 1 Reconnect the connectors J16 for the developing disengaging motor and J1100 for the DC controller PCB 2 Ifthe error persists replace the developing disengaging drive assembly 3 If the error persists replace the DC controller PCB Calibrate the printer after replacing the DC controller CLJ 4500 4550 CLJ 4600 CLJ 5500 A printer firmware problem exists Either
95. e Fuser e Charge roller e Imaging drum e Cleaning roller e Transfer belt or transfer drum e Transfer roller See the service manual for the specific product model for the appropriate repetitive defect ruler The first occurrence of a repetitive print defect is the defect closes to the leading edge of the media Measure from the first occurrence of the print defect to the first repetition of the defect and compare this measurement to the repetitive defect table in this section CAUTION Do not expose the imaging drum to light and be careful not to scratch or get fingerprints on the drum surface during cleaning Do not blow on the imaging drum ENWW Repetitive defects troubleshooting 249 Imaging drum defects Causes Damage such as scratches or dents on the imaging drum These usually appear as black or white marks on the page Paper dust adhering to the imaging drum These usually appear as white marks in the dark printed areas of the page Exposure of portions of the imaging drum to light This causes light sections in the printed output The life of the imaging drum is shortened by exposure to light Actions Print at least four configuration pages to determine if the defect repeats in the same horizontal orientation Inspect the imaging drum for scratches dents or other damage Replace if needed If the problem is dust remove the dust with isopropyl alcohol applied with a lint free static free wipe Try this only if t
96. e circles in the box at the bottom of the color balance calibration page If the circle in the center most closely matches the background pattern then the gray balance does not need to be adjusted If the circle does not match proceed to step 2 Locate the gray circle that most closely matches the background The magenta M and yellow Y numbers associated with this circle indicate the optimum gray balance settings for these colors Adjust the magenta and yellow settings yellow is horizontal and magenta is vertical until the gray circle is in the middle Use the values from the bars above to select the value to be entered After making adjustments to the magenta and yellow settings press GO to return the product to the F state 246 Chapter 4 Print quality ENWW Table 4 4 Adjusting color calibration continued Product CLJ 4600 CLJ 5500 Instructions Press SELECT to enter the Press DOWN ARROW to highlight Press SELECT to select 1 2 3 4 Press DOWN ARROW to highlight 5 Press SELECT to selec 6 7 8 Press DOWN ARROW or UP ARROW to highlight Press DOWN ARROW or UP ARROW to highlight the desired color Press DOWN ARROW or UP ARROW to highlight the correct density setting 9 Press SELECT to select the density setting 10 Press RIGHT or LEFT ARROW to set the density for the next color 11 After setting the density for each color press PAUSE RESUME CLJ 8500 CLJ 8550 ENWW
97. e down delivery roller PS5 Fusing delivery sensor PS1903 Left i Upper eft face up Eos bin fusing roller TB up delivery roller Registration roller paper sensor PS1 Tray 1 pick up roller Registration Feed roller 2 Lower manar roller V Ps17 fusing roller Pick up unit paper sensor Pick up roller O o Tray 2 ee Pick up roller O a Tray 3 pt ci Figure 3 4 Printer paper path CLJ 8500 8550 Table 3 5 Jam detection CLJ 8500 8550 Issue Cause Pick up delay jam 1 The page has not reached the pick up unit paper sensor PS17 within about e 1 2 seconds after leaving tray 2 e 1 3 seconds after leaving tray 3 226 Chapter 3 Jams ENWW Table 3 5 Jam detection CLJ 8500 8550 continued Issue Cause Pick up delay jam 2 The media does not reach the registration roller paper sensor PS1 within about e 1 9 seconds after leaving tray 2 e 2 0 seconds after leaving tray 3 1 8 seconds after leaving tray 1 Transfer jam The separation sensor PS5 does not detect the media for the specified time or longer within 1 5 to 2 2 seconds after the top of paper signal e about 0 1 seconds normal mode e about 0 4 seconds overhead transparency mode e about 0 3 seconds high gloss mode Fusing delivery paper delay jam The media has not reached the fusing delivery sensor PS1903 since the top of paper signal within about 3 2 seconds normal mode e 12
98. e images with the print defect samples found in the printer s service manual 16 Chapter 2 Service and troubleshooting ENWW e Can the customer print successfully from the host computer e Yes End e No Verify the maintenance media voltage environmental component hardware and configuration elements below Repeat control panel error message or service LED pattern actions and image defect corrective actions until all errors and defects are corrected Maintenance e Has the printer been maintained on a regular basis e Are all of the maintenance units within their rated life Media e Is the customer using media as specified in the printer user guide and in the HP LaserJet Family Print Media Guide e Is the media stored correctly and within environmental limits Voltage Has the line voltage been checked to make sure that it meets the printer requirements Large motors used near the printer can cause temporary voltage changes See Electrical specifications on page 23 Operating environment e Is the operating environment within the parameters listed in the printer service manual e ls the printer installed on a solid level surface e Is the printer protected from substances such as office cleaning materials and the ammonia gas that is produced by diazo copiers e Is the printer protected from direct sunlight Non HP components e Have all non HP components toner typeface DIMMs memory boards and EIO ca
99. e input tray lt size gt Last media size configured for the input tray 1 Load the media type and size specified on the printer control panel display 2 Replace the upper lower cassette lifter remaining paper sensor lever if it is damaged Also if the lifter is out of position set it in its correct position 3 If the message persists reconnect connector J1201 on the pick up PCA and connector J210 on the controller board 4 Ifthe message persists replace the tray 2 and tray 3 remaining paper sensors 1 and 2 5 If the message persists replace the pick up PCA 6 If the message persists replace the controller board 90 Chapter 2 Service and troubleshooting ENWW Table 2 13 Alphabetical printer messages continued Message Description Action The waste toner full sensor PS13 detects a waste toner full condition A light receiver and light pipe arrangement along with a window in the drum assembly look for a waste fill condition Verify that the sensors and light pipes are not blocked 1 Replace the drum kit 2 Check the sensor and replace it if it is defective Numerical error messages The following table contains the numerical error messages for all of the printer models that are covered in this guide Because different models require different procedures make sure that you find the exact combination of numbers and words that appears in the error messag
100. e modification of page counts and certain registration values for the printer Note The CLJ 2500 does not have a control panel display Service mode information is modified and or set using the following PUL commands from the MS DOS Editor window Follow the instruction in table 2 52 on page 186 to modify or set service information To gain access to the service mode Table 2 51 Gaining access to the service mode Product Instructions CLJ 2500 The CLJ 2500 does not have a control panel For service mode functions open the Embedded Web server by using one of these methods e From the HP Color LaserJet 2500 Series Toolbox click the picture of the printer on the Device tab Windows 98 NT 4 0 Me 2000 and XP only e For network printers only type the IP address for the printer To find the IP address print a Configuration page at the printer control panel by pressing Go and CANCEL JOB simultaneously The embedded Web server has three tabs that contain settings and information about the printer See the service manual for more information about each tab Note For more information about the embedded web server see hp embedded web server for hp LaserJet printers and mfps ENWW Service mode functions 183 Table 2 51 Gaining access to the service mode Product Instructions CLJ 4500 Note CLJ 4550 In the CLJ 4500 when the configuration page is printed while in service mode all event log me
101. e multi feeder tray PCB change from 0 to 24 V Replace the multi feeder tray PCB 24 UH Is 24 UH present on the multi feeder tray PCB and the holding plate solenoid See the CLJ 8550 mfp service manual Holding plate solenoid Disconnect connector J1302 of the holding plate solenoid from the multi feeder tray PCB Measure the resistance between connectors J1302 1 MPTSLD and J1302 2 24 UH on the harness side Is it about 1602 Replace the holding plate solenoid Replace the dc controller PCB 162 Chapter 2 Service and troubleshooting ENWW E054 CLJ 8550mfp Note This error pertains to the duplexing unit which is an accessory The duplexing feeding roller 1 home position sensor PS23 does not detect the home position of the duplexing feeding roller 1 when copy paper is being fed to the duplexing unit Table 2 25 Cause and solutions for E054 error Cause Issue Solution Duplexing Is the duplexing feeding roller 1 home Replace the lever feeding position sensor level damaged roller 1 home position sensor lever Duplexing Is the drive gear of the duplexing feeding Replace the worn or cracking feeding roller worn or cracked gear roller drive gear Duplexing Are connectors J2003 J2004 and J2007 Connect the connectors driver on the duplexing driver PCB connected securely PCB securely Duplexing Replace the duplexing feedi
102. e on the control panel display Note For error messages pertaining to the CLJ 8500mfp see Numbered error codes for the CLJ 8550mfp on page 154 ENWW Troubleshooting control panel messages 91 Table 2 14 Numerical error messages Message Description Action 2 CLJ 4600 CLJ 5500 Note The printer cannot always determine whether the error exists in the cartridge or in the printer reader writer The printer cannot read or write to at least one print cartridge memory tag or at 2 least one memory tag is missing XX Description 00 memory error on supply item 10 memory tag missing YY 00 01 02 03 Description black print cartridge cyan print cartridge magenta print cartridge yellow print cartridge 1 Turn the printer off and then on Exchange the cartridge for the color indicated with a cartridge in another slot to determine whether the error follows the cartridge or stays with the slot If the error follows the cartridge replace that cartridge Otherwise continue with step 3 o Reseat the connectors between the memory PCB J602 J605 and the antenna PCBs J901A D the memory PCB and the DC controller PCB J1028 If the message persists replace the antenna PCB 5 If the message persists replace the memory PCB If the message persists replace the DC controller PCB Calibrate the printer after replacing the DC controller For more i
103. e printer is turned off and on again find the cause of activation of the overcurrent overvoltage detection circuit in the power supply Wait more than two minutes before turning the printer on again If the error persists replace the power supply 130 Chapter 2 Service and troubleshooting ENWW Table 2 14 Numerical error messages continued Message Description Action The intake fan is located in 1 Turn the printer off and the front center of the drum then on to reset the alternates with drawer The drum draweris printer Because the fan referred to as the upper front is difficult to see listen to drawer for end users Fan hear if the fan is rotating rotation stops when the 2 Verify that FM3 drawer is opened A fan R LJ4 4 connector 27 is not CLJ 4500 4550 error message appears damaged or broken when fan motion is not Verify that the fan detected by the DC connector is firmly seated controller s micro processor into connector J1022 of if the drawer is closed and the DC controller PCB the printer is not in PowerSave mode 3 Verify that the fan connector is firmly seated into connector J1022 of the DC controller PCB 4 If the error persists replace the fan ENWW Troubleshooting control panel messages 131 Table 2 14 Numerical error messages continued Message Description Action CLJ 8500 8550 Fan 3 FM 3 has failed or is obstructed CAUTION
104. e problem is associated with a particular area of the printer Check the condition of the pickup rollers and feed rollers Worn separation pads on the multipurpose tray can cause media to multifeed Bent separation tabs can cause media misfeeds and multifeeds Replace the tray if necessary Defective paper tray switches can cause paper jams by indicating the wrong paper size to the formatter Scraps of paper that remain in the paper path can cause intermittent paper jams Always check that the paper path is clear when you clean the printer and when you clear paper jams Also remove the fuser and carefully check it for jammed paper 214 Chapter 3 Jams ENWW Paper path troubleshooting Paper path test CLJ 2500 paper path test If media is not being picked up or is not moving through the paper path you might want to observe all of the paper motion activities Override the door interlock SW301 to observe e motor rotation e solenoid action e pickup roller motion e drive roller transfer roller fuser roller and gear and delivery roller motion Push a piece of heavy paper into the slot in the top cover callout 1 to engage SW301 this overrides the door interlock Figure 3 1 CLJ 2500 door interlock ENWW Paper path troubleshooting 215 CLJ 4500 4550 paper path test 1 Press the ITEM key until you see E panel display 7 on the control 2 Press the SELECT key to activate the test While the test is running you
105. eated 5 If the error persists replace the sensor 6 If the error persists replace the ITB drawer 122 Chapter 2 Service and troubleshooting ENWW Table 2 14 Numerical error messages continued Message Description Action CLJ 4600 CLJ 5500 X Description temperature carousel rotation error Dmax density sensor CPR sensor OHT sensor yellow drum phase sensor magenta drum phase sensor 9 cyan drum phase sensor 10 black drum phase sensor 11 yellow density sensor 12 magenta density sensor 13 cyan density sensor 14 black density sensor 15 yellow CPR sensor 16 magenta CPR sensor 17 cyan CPR sensor 18 Black CPR sensor 19 ETB speed control sensor 20 CPR sensor 21 yellow toner remaining sensor 22 magenta toner remaining sensor 23 cyan toner remaining sensor 24 black toner remaining sensor 25 top sensor ONO Od ON Turn the printer off and then on and then check items in the order listed Check the indicated sensor 54 1 error Check the fuser See 50 X Fuser error 54 3 error Check the connections Replace the color registration detection assembly if necessary 54 5 error Check the connections Replace the color registration detection assembly if necessary 54 6 error Check the connections Replace the color registration detection assembly if necessary 54 7 54 8 54 9 or 54 10 error Check the connections Replace the drum phase s
106. eck the fuse in the power supply and replace the power supply if necessary 3 Verify that the DC controller is functioning and replace if necessary CLJ 2500 only Verify that the control panel cable is Control panel lights seated in both the control panel and do not cycle the formatter If the cable is connected correctly replace the control panel Verify that the DIMMs are seated correctly in the DIMM slots CLJ 4500 only The 1 Verify that the ribbon cable is front panel display is seated in both the formatter and dark and an error the DC controller message appears Ng Replace the interconnect PCB 2 Is the printer ready Control panel lights Consult the lists of control panel The printer should other than the Ready light messages on page 2 to identify function without error light are on or and correct the error indicator light blinking Ha ont p A CLJ 2500 only An See the appropriate service manual CLJ 2500 only error se adnan a messages appearing sap ine on the Printer Status Elinor status Alerts screen and Alerts screen There is aproblem See the appropriate service manual but no control panel lights are on or blinking and no messages appear on the Printer Status and Alerts screen 20 Chapter 2 Service and troubleshooting ENWW Table 2 1 Basic troubleshooting Verification steps Possible Solutions problems 3 Do engine tests and N
107. ectors between the laser scanner and DC controller PCB J1009 J1012 4 Replace the laser scanner assembly if it is defective Calibrate the printer after replacing the laser scanner See Calibrate Now CLJ 4600 and CLJ 5500 only on page 193 5 If the error persists replace the DC controller PCB Calibrate the printer after replacing the DC controller ENWW Troubleshooting control panel messages 109 Table 2 14 Numerical error messages continued Message Description Action CLJ 4550 CLJ 4550 A scanner error has occurred 1 Turn the printer off and on to reset the printer Verify connectors J551 on the beam detect PCB J1103 on the scanner motor and J1006 on the DC controller are fully seated and connected correctly If the error persists replace the laser scanner unit CLJ 8500 8550 A scanner error has occurred Turn the printer off and on to reset the printer Reconnect connector J901 on the scanner motor PCA relay connector J40 and connector J211 on the controller board Measure the voltage across connector J647 B11 24UH and J647 4 GND on the main relay PCA after the printer is turned on If the voltage is not 24 V replace the power supply Measure the voltage across connector J211 7 SCND and J211 6 GND on the controller board after the printer is turned on If the voltage changes from 0 V to 17 V or
108. ed See the diagnostics procedures in the service manual No action is required alternates with CLJ 4600 5500 A device failure has occurred on the specified drive 1 Printing can continue for jobs that do not require access to the disk drive 2 To clear the message turn the printer off and then on 3 Ifthe message persists remove and reinstall the EIO disk drive 4 Ifthe message persists replace the EIO disk drive CLJ 8500 8550 The printer hard disk s internal self test routine has been invoked to read minimum and maximum logical block addresses with no retries and has detected a failure If access to the printer hard disk is not required printer operation can continue Replace the printer hard disk alternates with CLJ 4600 5500 The printer received an illogical PIL command such as a download toa nonexistent directory 1 Printing can continue 2 Tum the printer off and then on 3 Ifthe message persists a problem might exist with the software program CLJ 8500 8550 The printer received an illogical PIL command such as a download to a nonexistent directory No action is required ENWW Troubleshooting control panel messages 67 Table 2 13 Alphabetical printer messages continued Message Description Action CLJ 8500 8550 The printer hard disk is full 1 At the host computer delete data fr
109. ed by one of the following 1 The marker is corrupt 2 The strip buffer size given to HiLite is too small 3 The strip buffer size given to HiLite is too large Note This error is primarily associated with the firmware and should not require a new formatter Message Description Action 43 G4ES Occurs during Resend the print job CLJ 4500 4550 decompression of the strip 100 Chapter 2 Service and troubleshooting ENWW Table 2 14 Numerical error messages continued Message Description Action CLJ 4500 4550 A large print job 800 to 1 200 pages or complex graphics can cause the printer to quit printing 1 Determine the page that is causing the failure If the page contains an image try to move the image down on a portrait page or to the left ona landscape page to move the image out of the strip that is failing The movements have to be very small so that the next strip will not fail 2 Put the printer in lossy mode with a sequence of PJL commands ESC 12345X PJL PJL Default Service mode HPBOISEID PJL Default Diagnostics ON PJL Enter Language PCL ESC 12345X PJL Esc z9999P Esc z50P Esc z201X To turn off lossy mode use the following commands ESC 12345X PuJL PJL Default Diagnostics OFF PJL Default Service Mode EXIT PJL EOJ ESC 12345X PuJL Using the printer in lossy mode might affect performance and print quality CLJ 4500 4550 An i
110. eer quickly troubleshoot common printer problems Although this reference is intended to provide information that the service engineer needs for onsite repair of HP LaserJet color products it is not intended to replace the service manual for any product For detailed information about the HP LaserJet color products described in this guide see the user guide or service manual for that product Service manuals for HP LaserJet products are available from Hewlett Packard This is the phone number for the Service Parts Order Desk 800 227 8164 U S only If you are located outside of the U S contact your local HP Sales and Service Office See Service support on page 287 ENWW iii Supported products Note This guide will be updated as the service needs change as new products are introduced or as information becomes available Table 0 1 Supported products Supported Model Maximum pages Service manual product number per month printing part number CLJ 2500 C9706A 30 000 C9706 90926 CLJ 2500L C9705A CLJ 2500n C9707A CLJ 2500tn C9708A CLJ 2500se 8 C9694A CLJ 4500 C4084A 35 000 C7085 90921 CLJ 4500N C4089A CLJ 4500dn C4094A CLJ 4550 C7085A_ 35 000 C7085 90921 CLJ 4550n C7086A CLJ 4550dn C7087A CLJ 4550hdn C7088A CLJ 4600n C9660A_ 85 000 C9660 90901 CLJ 4600dn C9661A CLJ 4600dtn C9662A CLJ 4600hdn C9663A CLJ 5500 C9656A 120 000 C9656 90930 CLJ 5500n C7131A CLJ 55
111. emove the printer s left side cover and inspect the mechanical linkage that closes SW3 3 Refer to the wiring diagram and verify the wiring The two wire connector should be firmly seated to SW3 and the wiring harness should be firmly seated to connector J1003 of the DC controller PCB 4 Ifthe message persists use an ohmmeter to verify functionality of SW3 5 Verify that FM3 in the front of the imaging drum drawer is functioning properly The fan connects through J77 to J1022 on the DC controller Note Closing the drawer also closes SW4 the drum drawer switch When SW4 is open the 24 V supply is disabled This safety feature protects the operator from any high voltages when the drum drawer or ITB drawer is open ENWW Troubleshooting control panel messages 63 Table 2 13 Alphabetical printer messages continued Message Description Action The printer has recognized the key sequence for selecting the display language Wait for the display language options to appear and then select the appropriate language For more information about selecting the display language see the service manual 3 The printer configuration page is being printed continuously Press CANCEL JOB to terminate continuous configuration page printing and return the printer to the PEARL state Note The HP LaserJet 4550 Paper Path test runs from the Information Menu A cont
112. ensor for the indicated color if necessary 54 11 54 12 54 13 or 54 14 error Check the connections Check the cartridge and replace it if necessary Replace the color registration detection assembly if necessary 54 19 error Check the ETB connection Replace the ETB if necessary Replace the DC controller if necessary ENWW Troubleshooting control panel messages 123 Table 2 14 Numerical error messages continued Message Description Action CLJ 4600 CLJ 5500 continued 54 20 error Check the connection Replace the color registration detection assembly 54 21 54 22 54 23 or 54 24 error Check the connections Replace the toner level sensing PCB if necessary Replace the DC controller if necessary CLJ 4500 4550 alternates with CLJ 4600 CLJ 5500 The print engine is not communicating with the formatter The communication link between the formatter and DC controller was lost This can occur because of a timing error or intermittent connection between the formatter and DC controller 1 Tum the printer off and on to reset the printer Reseat the connectors between the formatter and DC controller If the problem persists replace the DC controller PCB Calibrate the printer after replacing the DC controller Replace the formatter if necessary Initialize NVRAM CLJ 8500 8550 Indicates a printer command error The commands cannot be
113. ent jam troubleshooting naana 229 OLJ 2500 wick EE a ee a hw ea dn ee eae 229 ChJ 4500 4550 ica sided ad heed Poa ae eda 229 CLUJ 4600 5500 16 eee 229 CLJ 8500 8550 2 238 4 Print quality Printer cleaning page ee eee 240 Life expectancies of print cartridges 241 Image quality 42g dasa dee WT LANG ARE Bear wed op ad 242 Drum functional test 0c eee ees 242 Print density test and color checks 243 Understanding color variations a 243 Common causes of color variation 244 Adjusting color balance cece eee 245 Repetitive defects troubleshooting 249 Imaging drum defects cece eee eee 250 5 Illustrations Major components 0 00 c eee eae 256 CLJ 2500 major components 0a eee 256 CLJ 4500 4550 major components 00005 260 CLJ 4600 major components 0a eee 267 CLJ 5500 major components n asaan eee eee 271 CLJ 8500 8550 major components 00005 277 Contents ENWW ENWW Power On sequences 1 1 ee ees 283 CEJ 2500 ifsc eel eee ewe ee he MENS eee pees 283 CLJ4500 4950 ese ates Lana ead ade Pma Ann 284 CL 4600 naa tke eee Seal ieee me add 284 CEJ 5500 AASA 285 CLJ 8500 8950 emonic eee ee eee a eee a 286 A Service support Obtaining work instructions 0 000 cece eee eee 288 To gain access to wo
114. eplaced by itself these values are copied from the formatter to the DC controller If a new formatter is replaced or if an NVRAM initialization is performed see page 190 these values are loaded onto the formatter from the DC controller Printing a registration page 1 Scroll through the Service menu until displayed Select the paper tray to pull paper from only when setting left side margins will the tray actually matter Press SELECT to print the registration page CLJ 4600 Press SELECT to enter the ME CLJ 5500 2 Press Down ARROW to highligh Press SELECT to select Press DOWN ARROW to highlight F Press SELECT to print the pages CLJ 8500 Not applicable CLJ 8550 Not applicable 196 Chapter 2 Service and troubleshooting ENWW Setting registration numbers CLJ 4500 and CLJ 4550 only On each of the color bars in the process section are bold numbers that indicate the current number set on the control panel These bold numbers will always be in the middle of the bars To set the correct value for each of the colors look at the lines within the bar and find the grouping that has the color line directly on top of the black line it will have more white space Print at least five registration pages to see if the new settings are correct Note Using a magnifying glass to look at the lines will help in selecting the best number Setting the registration number CLJ 4500 4550 only 1 Use the ITEM key to
115. er 140 Chapter 2 Service and troubleshooting ENWW Table 2 14 Numerical error messages continued Message Description Action Developing disengaging motor error 1 Reconnect the connectors J4024 and alternates with J1019 between the developing disengaging motor and the DC controller PCB 2 If the error persists replace the developing CLJ 4600 CLJ 8500 disengaging drive 8550 assembly continued 3 If the error persists replace the DC controller PCB Calibrate the printer after replacing the DC controller CLJ 5500 1 Turn the printer off and then on 2 This message might also appear if the transfer unit is missing or incorrectly installed Ensure that the transfer unit is correctly installed ETB motor error 1 Clean the ETB unit intermediate connector J36 If the connector is damaged replace it 2 Reconnect the connectors J38 for the ETB motor and J1111 on the DC controller PCB ENWW Troubleshooting control panel messages 141 Table 2 14 Numerical error messages continued Message Description Action alternates with CLJ 4600 CLJ 8500 8550 continued 3 If the error persists replace the ETB motor 4 Ifthe error persists replace the DC controller PCB Calibrate the printer after replacing the DC controller See Calibrate Now CLJ 4600 and CLJ 5500 only on page 193 Fuser motor error 1 Reconnect th
116. erence CLJ 5500 component 1 I O daughter card 2 Firmware DIMM 3 Static discharge PCB assembly 4 Formatter simplex Formatter duplex 5 DC controller PCB 6 E label memory controller PCB 7 Cassette sensor PCB 8 Multi purpose tray sensor PCB 9 Toner sensor PCB 10 High voltage power supply PCB Fuser power supply PCB x 5500 and 5500n printers do not have duplex capability The formatter is available with either simplex or duplex capability Be sure to use the correct formatter for the model of printer you are servicing The HP Color LaserJet 276 Chapter 5 Illustrations ENWW CLJ 8500 8550 major components Delivery assembly Black cartridge cam assembly Black cartridge guide assembly Delivery drive assembly Paper pickup Left cover assembly feeder assembly Transfer belt assembly Registration roller assembly Tray 1 pickup Kk assembly Tray 1 _ assembly Registration frame assembly Figure 5 22 CLJ 8500 8550 major assembly locations 1 of 2 ENWW Major components 277 Drum cartridge drive assembly Solenoid assembly Delivery frame Fuser assembly assembly Black toner cartridge Imaging drum Color toner cartridge Figure 5 23 CLJ 8500 8550 major assembly locations 2 of 2 ENWW 278 Chapter 5 Illustrations Figure 5 24 CLJ 8500 8550 printer sensors
117. error persists replace the cassette cross member assembly which includes the temperature humidity sensor 3 If the error persists replace the controller board 114 Chapter 2 Service and troubleshooting ENWW Table 2 14 Numerical error messages continued Message Description Action CLJ 4500 4550 A problem exists with the 1 Turn the printer off and carousel assembly Either then on to reset the the carousel is not rotating printer or the sensor has failed 2 Open the color print Drive motor M3 provides cartridge door and look drive for the print cartridge forani obstruction If carousel If motion is not necessary remove the detected a 54 2 error orint cartridges appears M3 Is a amp phase individually by manually stepping motor and receives releasing the carousel its drive signal from J203 of brake and rotating the thedeveloping POB carousel around to each Photosensor PS10 monitors cartidge position and movement and me removing the cartridges Cartridge carousel Different Tu the primer off and width tabs four tabs one for onito reset ie pater each cartridge on the left Note end of the carousel housing The printer cannot pass through PS10 to operate with the top cover provide positioning removed unless the information The black print carousel brake has been cartridge tab is the home released or removed position Print cartridge positio
118. ervice and troubleshooting ENWW Table 2 14 Numerical error messages continued Message Description Action Pag FRM FAILU Fan 2 FM 2 has failed or is CAUTION CLJ 8500 8550 obstructed Turn the printer off and do not operate the printer in this condition to prevent serious damage 1 Turn the printer off and on to reset it 2 Reconnect connectors J703 and J706 on the carousel motor PCA and reconnect connector J220 on the controller board 3 Reconnect connector J701 on the carousel motor PCA connector J648 on the main relay PCA and connector J102 on the DC power supply 4 Measure the voltage across connector J703 3 FAN2ON and J703 1 GND on the carousel motor PCA after the printer is turned on If the voltage changes from 0 V to 24 V replace fan 2 5 Measure the voltage across connector J701 1 24 VB and J701 2 GND on the carousel motor PCA after the printer is turned on If the voltage is about 24 V replace the carousel motor ENWW Troubleshooting control panel messages 129 Table 2 14 Numerical error messages continued Message Description Action CLJ 8500 8550 continued 6 Measure the voltage across connector J641 1 24 VB and J641 4 GND on the main relay PCA after the printer is turned on If the voltage is 24 V replace the main relay PCA Check the ac power supply If the problem is not corrected after th
119. eshooting ENWW Table 2 14 Numerical error messages continued Message Description Action CLJ 4600 CLJ 5500 CLJ 8500 8550 continued CLJ 4500 4550 PostScript file using Windows 3 1 or 9x 9 Ifthe error no longer exists install each DIMM and EIO device one ata time making sure to turn the printer off and then on as you install each device 10 Replace a DIMM or EIO device if you determine that it causes the error 11 Reconnect all cables that connect the printer to the network or computer 12 If the error persists replace the firmware DIMM 13 If the error persists replace the formatter and calibrate the printer The printer is printing a No action required CLJ 4500 4550 An NEC firmware ROM error has occurred Replace the firmware CLJ 4500 4550 Unsupported EDO memory has been installed Remove unsupported memory CLJ 4500 4550 Indicates a media timing issue This occurs when printing multiple copies of transparencies or heavy or glossy media with either the PCL or PostScript driver The message also can indicate a timing mismatch between the engine and formatter Print one transparency of heavy glossy sheet ata time ENWW Troubleshooting control panel messages 99 Table 2 14 Numerical error messages continued buffers when the end of the strip marker is missing This is trigger
120. essed data The printer is waiting for a form feed Press Go ENWW Troubleshooting control panel messages 65 Table 2 13 Alphabetical printer messages continued Message Description Action The printer received data and Press SELECT to continue is waiting for a form feed When the printer receives CLJ 8500 8550 another file the message should disappear A density sensor out of range The density sensor might be error was detected during a dirty Inspect and clean the color calibration sensor alternates with Note The density sensor on the CLJ 8500 8550 is cleaned whenever the top right door is opened and closed A piece of foam attached to the transfer drum wipes the density sensor lens This error is more often related to a printer failure that causes the density pattern not to be written to the ITD Defeat the right upper door interlocks and examine the ITD during calibration to see if the patterns are written correctly A tray has been loaded with 1 Press HELP for detailed paper that is a standard size information and the switch inthe tray is 2 Press UP ARROW and set to custom Down ARROW to step through instructions alternates with 66 Chapter 2 Service and troubleshooting ENWW Table 2 13 Alphabetical printer messages continued Message Description Action The extended diagnostics power up key sequence has been enter
121. et to factory defaults defaults during the error recovery 2 Perform a factory defaults reset see the service manual 3 Perform a cold reset see the service manual A non volatile storage 1 Check the printer settings device is full Some settings to determine which CLJ 4500 4550 might have been reset to values have been factory defaults changed 2 Clear the message by pressing Go 150 Chapter 2 Service and troubleshooting ENWW Table 2 14 Numerical error messages continued Message Description Action CLJ 8500 8550 A non volatile storage device is full Some settings might have been reset to factory defaults Check the printer control panel settings One or more fields might have been reset to their factory defaults during error recovery The next time the printer is turned off and on NVRAM will clear and all factory defaults will be restored alternates with CLJ 4600 CLJ 5500 One or more printer settings saved in the non volatile storage device is invalid and has been reset to its factory default Pressing the SELECT button should clear the message Printing can continue but you might experience unexpected behavior X Description 0 onboard NVRAM 1 removable disk flash or hard 1 Press SELECT to continue 2 Turn the printer off and then on 3 Check the printer settings to determine which settings have been changed alternates with
122. etting 1 registration values are located on a sticker inside of the front of the printer e Engine setting 2 same as above CR paper size cold reset Clear event log e rims menu is provided for manufacturing and field service personnel to perform specific diagnostic tests on the formatter board and its related components Execute tests e Fault setting determines how the printer will perform when an error is encountered e ROM CRC memory test DRAMM DIM memory test e IDE ASIC formatter IDE ASIC test Disk hard disk test VX ASIC formatter VX ASIC test e Fault log event error log e Power off to exit turn printer power off to exit the formatter diagnostics e Paper path e Developer motor e Drum motor e Sensor monitor e Exit service mode ENWW Service mode functions 189 NVRAM Initialization NVRAM initialization should always be executed immediately after replacing the firmware or the formatter board This procedure aligns the firmware with the formatter Not performing NVRAM initialization could result in deterioration of print quality Before initializing NVRAM be sure to gather and write down the information listed below if possible e Total page count and color page count e Percentage of life remaining for both the transfer kit and the fuser kit e Serial number Note This information is available on the configuration page or through the service mode After replacing the firmware or the formatter board the follo
123. event log 32 Chapter 2 Service and troubleshooting ENWW Table 2 8 Printing a supplies status page continued Product Instructions Press SELECT to enter the 1 2 Press DOWN ARROW to highlight 3 Press SELECT to select 4 5 Press DOWN ARROW to highlight Press SELECT to select ENWW The CLJ 8500 8550 do not support a supplies status page For information about the percentage of consumables remaining print a configuration page Printing information pages 33 Troubleshooting control panel messages This section provides a list of control panel messages that are found in the CLJ 2500 Alphabetical error messages are listed first on page page 49 followed by numerical messages on page 91 Control panel messages that are self explanatory are not included See the service manual for more detailed information CLJ 2500 control panel light messages The following section describes the meaning of the light patterns in the Printer Status area Information about the printer status also appears in the Printer Status and Alerts software and the embedded Web server Several errors have secondary light patterns which provide more information about the specific type of error that occurred The following errors types have secondary light patterns e Attention with Ability to Continue errors see page 39 e Accessory errors see page 42 e Service errors See page 46 Control Panel Lights Use the following legend to re
124. f you press GO without selecting a language the printer brings itself online and all subsequent messages are in English However because no display language was selected the message reappears after the power on self test when the printer is turned on again This message appears every time the printer is turned on until you select a language by using this procedure Press ALUE until the language you want appears on the control panel display Press SELECT to save the selection An asterisk appears to the right of the selection The language that is selected is the default language until another selection is made by using this procedure 4 Press Go 5 Turn the printer off and back on Using the control panel 7 Upgrading the firmware There are several ways that you can upgrade the product s firmware The following table lists whether or not your product has firmware available on www hp com Product Firmware available Location on HP website CLJ 2500 3 002 00 Not available by website CLJ 4500 Yes Not available by website CLJ 4550 CLJ 4600 Yes http www hp com go clj4600_ firmware CLJ 5500 Yes http www hp com go clj5500 firmware CLJ 8500 Yes Not available by website CLJ 8550 The following is a list of procedures available for upgrading firmware Using Internet Explorer for flashable firmware on page 9 Using HP Web Jetadmin on page 9 Using a manual download for parallel
125. fault setting for each color is zero The range of settings is 5 to 5 Note Adjusting densities using the four color bars provides coarse color balance adjustments After making these adjustments you can fine tune color densities by adjusting the gray balance See step 4 for instructions ENWW Image quality 245 Table 4 4 Adjusting color calibration continued Product CLJ 4500 CLJ 4550 continued Instructions Adjust color density 1 Examine the cyan density bar C the magenta density bar M the yellow density bar Y and the black density bar K on the color balance calibration page from a distance of 2 meters 6 feet If the center oval for each bar matches the background pattern more than the other ovals the color density does not need to be adjusted If an oval left of center or right of center matches the background more than the center oval proceed to step 2 Press ITEM until displays Press the right side of the VALUE key to increase the value or press the left side to decrease it until the number corresponding to the oval that most closely matches the background pattern is displayed Press SELECT to save the value An asterisk displays next to the selected setting 4 Repeat step 1 Adjust gray balance 1 Adjusting densities using the gray balance pattern allows you to fine tune color balance This process affects all four color bars Examine the gray balanc
126. fety reasons the fuser high voltage supplies and scanner are all turned off during testing From the Service Mode menu press MENU until appears Press ITEM until appears Press ALUE to specify the number of repetitions 1 to 10 and then press SELECT bk OD Press ITEM until the input source that you want to test appears you can select more than one input source for the test Press VALUE until GH or FF appears on the display and then press SELECT Press ITEM until cH Press VALUE until Ti appears on the display IH appears on the display Press SELECT to select the output destination O ON OH Press ITEM until perform the paper path test T appears on the display and then press SELECT to Note To stop the paper path test press CANCEL JOB The transfer drum can be removed by opening the right upper door open and overriding the right cover interlock However media might not feed past the transfer area unless 11 by 17 inch or A3 sized media is used ENWW Paper path troubleshooting 217 Jams CLJ 2500 jams Occasionally paper or other print media can become jammed during a print job Causes include the following Input trays are loaded improperly or are overfilled Optional tray 2 or optional tray 3 is removed during a print job The top cover is opened during a print job Too many sheets have accumulated in an output area or blocked an output area The media
127. ges CLJ 2500 continued 53 x3 zz Printer DIMM Slot 3 1 Remove the DIMM and error reinstall it to make sure that it A problem exists with the DIMM in is correctly installed nee 2 Make sure that you are using Oo a supported DIMM See CAUTION chapter 7 for ordering You must turn off the printer information before inserting or removing 3 Move the DIMM to a different DIMMs to avoid damaging them DIMM slot If the DIMM works in a different slot then DIMM slot 3 is malfunctioning 4 Tocontinue printing remove the DIMM from DIMM slot 3 ENWW Troubleshooting control panel messages 45 Service error secondary messages CLJ 2500 Ao De If the printer has a service error Attention light Ready light and Go light are on press and hold Go and CANCEL JOB simultaneously to see the secondary error message You can also view the embedded Web server which provides a text message that corresponds to the error and its secondary light pattern Table 2 12 Service error secondary messages CLJ 2500 Message Description Solution 51 x Bad beam detecterror 1 Press GO The page that contains the error will automatically be reprinted o 2 Turn the printer off and then De on 3 Replace the laser scanner 52 x Scanner error 1 Press GO The page that contains the error will automatically be reprinted 2 Turn the printer off and then Oe on 3 Turn the printer off and then D reseat the laser
128. he Printer Unit Service Manual E001 CLJ 8550mfp The fusing assembly has overheated This error occurs when the fusing temperature during standby or copying exceeds 230 C Table 2 16 Cause and solutions for E001 error Cause Issue Solution Upper With the fusing assembly removed Check the wiring from connector thermistor measure the resistance between J222 on the dc controller PCB to short connectors J26F A4 FXTHU and the upper thermistor if normal circuit J26F A3 GND on the fusing replace the fuser assembly assembly side Is it 2 KQ or less Lower Measure the resistance between Check the wiring from connector thermistor connectors J26F A2 FXTHL and J222 on the dc controller PCB to short J26F A1 GND on the fusing the lower thermistor if normal circuit assembly side Is it 2KQ or less replace the fuser assembly Power Replace the power supply of the End supply printer unit Is the problem Replace the dc controller PCB printer corrected unit CAUTION If E001 or E003 is indicated be sure to discharge the error memory capacitor C259 on the dc controller PCB after troubleshooting the problem as it may contain error memory Short out JP201 on the dc controller PCB to discharge C259 see the Printer Unit Service Manual 156 Chapter 2 Service and troubleshooting ENWW E004 CLJ 8550mfp The upper and lower fusing heaters have an open circuit This error occurs whe
129. he drum cartridge on off switch guide is deformed 5 Make sure that the drum cartridge is installed e Install the drum cartridge if it is not installed e If the drum cartridge is already installed turn the printer off reinstall the drum cartridge and turn the printer on 78 Chapter 2 Service and troubleshooting ENWW Table 2 13 Alphabetical printer messages continued Message Description Action continued 6 Reconnect connectors J641 to J643 and J647 on the main relay PCA connectors J671 and J673 on the subrelay PCA connector J102 on the power supply and connector J227 on the controller board 7 Check electrical continuity between connector J641 1 24 VB and J642 3 PMP on the main relay PCA when the door switch SW641 is turned on If there is no electrical continuity replace the right cover switch on the main relay PCA 8 Check electrical continuity between connector J671 2 PMP and J671 2 PFUPR on the subrelay PCA when the door switch SW671 is turned on If no electrical continuity exists replace the delivery cover front cover switches on the subrelay PCA 9 Measure the voltage across connector J641 1 24 VB and J641 A1 GND on the main relay PCA after the printer is turned on If the voltage is not 24 V replace the power supply ENWW Troubleshooting control panel messages 79 Table 2 13 Alphabetical printer messages conti
130. he formatter inputs a print command until the TOP signal is sent to the formatter photosensitive drum s sensitivity in preparation for a print operation ENWW Power on sequences 285 Table 5 4 Basic operation sequence CLJ 5500 continued CLJ 8500 8550 This information is not available for this product 286 Chapter 5 Illustrations Period Purpose Remark PRINT From the end of the To form an image on After the power is print period INTR period until the the photosensitive turned on the cartridge leading edge drum according to is cleaned every 35 detection sensor the video signal input pages and the ETB is detects paper and from the formatter cleaned every 100 then turns off the and to transfer the pages transfer positive toner image to the bias paper LSTR From the end of the To deliver the paper The last rotations last rotations PRINT period until out of the printer and period lasts until the period the ETB motor stops to clean the ETB instant the formatter sends a print command Then the initial rotations period starts again ENWW Service support Contents Obtaining work instructions s 0000 eee tenes 288 To gain access to work instructions eee 288 Embedded web server 200 eee eee eee 289 Obtaining service notes 0 0 0 cc ene 289 To gain access to service notes 0c eee ee eee eee 289 Service
131. he print defect is unacceptable and the only other alternative is replacing the imaging drum Defects caused by exposure to light might clear up over time If severe replace the imaging drum Note The following defect rulers are to scale if this manual is printed on A5 size paper 250 Chapter 4 Print quality ENWW Table 4 5 Repetitive defects 22 1 mm 87 inches 33 9 mm 1 33 inches 37 9 mm 1 49 inches 38 1 mm 1 5 inches 41 9 mm 1 65 inches Pre ICL roller Developer sleeve ICL roller Charging roller RS roller 44 3 mm 1 74 inches T1 transfer T2 transfer 66 6 mm 2 62 inches Pressure roller 56 9 mm 2 24 inches 75 6 mm 2 98 inches Fuser film 89 0 mm 3 5 inches Transfer belt drive roller 90 0 mm 3 54 inches Transfer belt tension roller 148 3 mm 5 84 inches Cartridge drum CLJ 4500 4550 ENWW 40 mm 1 6 inches Charge roller 152 mm 6 inches Imaging drum 37 mm 1 5 inches Black developer sleeve 30 mm 1 2 inches Color developer sleeve 131 mm 5 2 inches Fuser 40 mm 1 6 inches ITB ICL roller 53 mm 2 1 inches Transfer roller Repetitive defects troubleshooting 251 Table 4 5 Repetitive defects continued CLJ 4600 14 mm 0 5 inches Toner charging roller 33 mm 1 3 inches Developing cylinder 38 mm 1 5 inches Prim
132. he printer fuser is fully seated 2 Press HELP for detailed information 3 Press UP Arrow and DOWN ARROW to step through the instructions 4 If the error persists verify that the connectors J18 on the fuser and J1101 on the DC controller are good replace them if necessary 5 Replace the fuser assembly 6 Replace the DC controller PCB Calibrate the printer after replacing the DC controller See Calibrate Now CLJ 4600 and CLJ 5500 only on page 193 bh The printer has detected that Install the fuser and verify the fuser is not installed that it is working correctly 2 Reconnect connector J26 on the fuser 3 Reconnect connector J222 on the controller board 4 Ifthe message persists replace the controller board ENWW Troubleshooting control panel messages 77 Table 2 13 Alphabetical printer messages continued Message Description Action The printer has detected that the imaging drum is not installed All doors must be closed for the printer to detect the imaging drum pa Install the imaging drum before attempting to print If the condition persists take the imaging drum out and reinstall it Note Theimaging drum mustbe installed and the upper lever must be to the left in order for the carousel to rotate 2 Turn the printer off and on to reset the printer 3 Replace the drum cartridge 4 Replace the drum cartridge if t
133. hp LaserJet quick reference service guide color service volume Ill hp color LaserJet quick reference service guide volume Il April 2003 edition 2003 Copyright Hewlett Packard Development Company LP Reproduction adaptation or translation without prior written permission is prohibited except as allowed under copyright laws The information contained herein is subject to change without notice The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services Nothing herein should be constructed as constituting an additional warranty HP shall not be liable for the technical or editorial errors or omissions contained herein Publication number 5851 1493 Edition 1 4 2003 Trademark credits Adobe and PostScript are registered trademarks of Adobe Systems Inc which may be registered in certain jurisdictions Microsoft MS DOS Windows and Windows NT are U S registered trademarks of Microsoft Corporation UNIX is a registered trademark in the United States and other countries licensed exclusively through X Open Company Limited PANTONE is a registered trademark of Pantone incorporated Hewlett Packard Development Company LP 20555 S H 249 Houston TX 77070 Ordering other manuals This HP Color LaserJet Family Quick Reference Service Guide has been created to help the HP LaserJet service engin
134. ice mode functions on page 183 Note Errors described as printer or printer unit will also appear as error messages on the printer s LCD E000 E003 CLJ 8550mfp E000 The fusing assembly warm up is faulty This error occurs when it takes longer than the reference time for the assembly to reach the standby temperature after the fusing heater has been turned on E003 The fusing temperature is abnormally low This error occurs when the fusing assembly temperature drops below 120 C after it has reached the target value 154 Chapter 2 Service and troubleshooting ENWW Table 2 15 Cause and solutions for E000 E003 errors Cause Issue Solution Upper Remove the fusing assembly and Check the wiring from connector thermistor measure the resistance between J222 on the dc controller PCB to open connectors J26F A4 FXTHU and the upper thermistor if it is normal circuit J26F A3 GND on the fusing replace the fuser assembly assembly side Is it between 250 KQ and 600 KQ normal temperature Lower Measure the resistance between Check the wiring from connector thermistor connectors J26F A2 FXTHL and J222 on the dc controller PCB to open J26F A1 GND on the fusing the lower thermistor if it is normal circuit assembly side Is it between 250 KQ replace the fuser assembly and 600 KQ normal temperature Upper With the fusing assembly removed is Check the upper fusing heater and fu
135. idges See print cartridges toner lever unlocked error message 82 toner out message 88 top output bin full 89 sensor errors 86 transfer belt 85 transfer drum 81 transfer jams 55 59 transfer roller replacing 15 transfer unit troubleshooting 82 transfer wrap jams CLJ 8500 8550 238 trays CLJ 2500 error messages 37 feed errors 124 jams 55 jams tray 1 60 jams tray 4 59 registration 196 197 size mismatch error message 87 tray 1 errors 50 89 136 unexpected size message 95 unexpected type message 95 See also 2 000 sheet input tray 298 Index troubleshooting accessory errors CLJ 2500 42 calibration 193 checklist 16 CLJ 8550mfp 154 color 243 244 245 configuration page 16 control panel 16 19 engine test 199 error messages alphabetical list 49 error messages numerical list 91 jams See jams networks 18 paper path 214 215 power 19 repetitive defects 249 service error messages CLJ 2500 46 software 21 supplies 15 73 U unexpected size message 39 95 unexpected type message 95 unlocked toner lever 82 unplugging printer 16 Up arrow button 4 upgrading firmware using FTP 10 using HP Web Jetadmin 9 using Internet Explorer 9 using manual download 10 versions supported 8 USB ports troubleshooting 21 V Value button locating CLJ 4500 4550 3 CLJ 8500 8550 5 voltage 17 23 ENWW W waste toner errors 91 120 Web Jetadmin firmware upgrades 9 websites firmware upgrades 8 HP Web Jetadmin 9 parts informat
136. ier Set the cartridge correctly and cartridge correctly turn the copier off and then on Drum Check the drum cartridge switching If the lever is displaced set it to cartridge lever on the printer side Is it displaced the correct position If the lever switching or cracked is cracked replace it lever Drum Is the drum cartridge switching guide Replace the drum cartridge cartridge defective switching guide Connector Are connector J209 on the dc controller Connect the connectors memory PCB and relay connectors J47 and J48 securely inside the connected securely drum cartridge Memory Replace the drum cartridge Is the End inside the problem corrected Replace the dc controller PCB drum cartridge E812 CLJ 8550mfp This error occurs when the intermediate transfer drum ITD home position is not detected within a specific time about 10 seconds Table 2 48 Cause and solutions for E812 error Cause Issue Solution Intermediate Is the intermediate transfer drum ITD Set the drum properly and turn transfer set in the printer properly the power off and then on drum ITD See E020 CLJ 8550mfp on Density page 159 sensor ENWW Troubleshooting control panel messages 181 E813 CLJ 8550mfp This error occurs when both the upper fusing roller temperature detection signal FXTHU and the lower fusing roller temperature detection signal FXTHL indicate 10 C or less
137. information pages on page 26 Does the print quality meet the customer s expectations See Image quality on page 242 Can the customer print from the host system See the appropriate service manual for your product Table 2 1 Basic troubleshooting Verification steps Possible Solutions problems Does the printer turn No power 1 Verify that the printer is plugged on successfully into an active electrical outlet of When the printer is the correct voltage connected to a 2 Verify that the power cable is grounded power functional source the control panel lights should be 3 Verify that the power on off displayed and the fans switch is on CLJ 2500 that the should run In the CLJ power on button is pushed in 2500 the control panel CLJ 4500 that the on off switch is switched on CLJ 4600 and after another and the CLJ 5500 or that the three cartridge carousel power switches are all switched should rotate on CLJ 8500 and CLJ 8550 4 CLJ 8500 and CLJ 8550 only Verify that the circuit breaker in the copy module has not been tripped lights should cycle one ENWW Basic troubleshooting 19 Table 2 1 Basic troubleshooting Verification steps Possible Solutions problems Does the printer turn The control panelis 1 Remove any HP Jetdirect or on successfully blank other EIO cards and then try to continued turn the printer on again 2 Ch
138. ing 15 294 Index G Go light button accessory error messages CLJ 2500 42 Attention with Ability to Continue messages CLJ 2500 39 CLJ 2500 locating 2 CLJ 2500 messages 35 CLJ 2500 status 34 CLJ 4500 4550 locating 3 CLJ 8500 8550 locating 5 service error messages CLJ 2500 46 H hard disk failure errors 67 full errors 68 initialization 84 192 multiple not supported 88 write protected 68 69 heaters CLJ 8500 8550 281 Help button 4 HP color LaserJet 2500 See CLJ 2500 HP color LaserJet 4500 4550 See CLJ 4500 4550 HP color LaserJet 4600 See CLJ 4600 HP color LaserJet 5500 See CLJ 5500 HP color LaserJet 8500 8550 See CLJ 8500 8550 HP Customer Care 290 HP Embedded Web Server 289 HP Jetdirect print servers ElO errors 43 HP Technical Training 290 HP Web Jetadmin firmware upgrades 9 l illustrations components CLJ 2500 256 CLJ 4500 4550 260 CLJ 4600 267 CLJ 5500 271 CLJ 8500 8550 277 imaging drum error messages 69 life out 70 repetitive defects troubleshooting 249 status light 2 status page printing 32 troubleshooting 78 indicator lights See lights ENWW information pages configuration 26 demonstration 28 event log 31 menu map 30 printing 26 troubleshooting 21 initialization hard disk 192 NVRAM 190 instructions work 288 Internet Explorer firmware upgrades 9 IP address 289 Item button CLJ 4500 4550 locating 3 CLJ 8500 8550 locating 5 J jams 2 000 sheet input tray 53 CLJ 2500 clear
139. ing 218 CLJ 4500 4550 clearing 221 CLJ 4600 5500 clearing 223 CLJ 8500 8550 clearing 226 duplexer 51 error messages 59 face down output bin 58 fuser 52 input tray 55 multi bin mailbox 56 persistent troubleshooting 229 transfer wrap CLJ 8500 8550 238 tray 1 60 tray 4 59 troubleshooting checklist 214 Jetadmin firmware upgrades 9 Jetdirect print servers ElO errors 43 K keys See buttons L language control panel 6 languages printer 41 50 laser scanner errors 46 94 108 110 LEDs See lights lever toner 82 life expectancies print cartridges 241 ENWW lights 2 000 sheet input tray CLJ 8500 8550 209 accessory error messages CLJ 2500 42 Attention with Ability to Continue messages CLJ 2500 39 CLJ 2500 locating 2 CLJ 2500 status 34 CLJ 4500 4550 3 CLJ 4600 5500 4 CLJ 8500 8550 5 service error messages CLJ 2500 46 troubleshooting 19 locked control panel menus 49 lossy mode 101 M Magenta print cartridge light 2 mailboxes bin full error message 72 communication errors 83 communication troubleshooting 145 errors troubleshooting 149 jams 56 manuals ordering iii part numbers iv service notes 289 work instructions 288 margins registration 197 matching color 243 244 media error messages 39 89 size mismatch 87 unexpected size 95 unexpected type 95 media jams See jams memory DIMM errors 44 112 144 insufficient 39 83 144 NVRAM errors 42 150 NVRAM initialization 190 Menu b
140. int cartridge and the contact on the printer for damage e Replace defective parts Replace the black print cartridge if it is defective e Check the contacts If they are disconnected return them to their correct positions 4 If the message persists replace the high voltage converter 1 PCA 5 If the message persists replace the controller board The printer can support only one physical printer hard disk and two have been detected Printing will not be possible until one of the hard disks has been removed Turn the printer off and remove the extra printer hard disk Note The 8500 8550 DN model comes with a factory installed internal hard disk on the formatter board 88 Chapter 2 Service and troubleshooting ENWW Table 2 13 Alphabetical printer messages continued Message Description The top face down output bin of the printer is full Action 1 Remove all media from the top face down output bin on the printer to continue printing 2 If the message persists verify that the PS30 PS10 PS11 and PS3 sensors and the surrounding area are clean CLJ 8500 8550 Media was stacked in tray 1 for continuous manual feed printing and the job has been completed However there is still media in the input tray The printer considers the input tray not to be configured Configure the media type for tray 1 or remove the remaining media
141. inuous configuration page is printing Press CANCEL JOB to exit the configuration page printout mode If the printer is in the process of printing when CANCEL JOB is pressed the printer finishes printing the buffered pages before returning online 64 Chapter 2 Service and troubleshooting ENWW Table 2 13 Alphabetical printer messages continued Message Description Action The CPR sensor is not behaving correctly 1 Force a calibration by selecting from the Ty menu See Calibrate Now CLJ 4600 and CLJ 5500 only on page 193 2 If the message persists verify that the cables are seated properly and the connectors J32 on the color registration detection unit and J1119 on the DC controller are making good contact 3 If a laser scanner unit has recently been replaced make sure it has been installed properly If it is installed properly replace it with a new one 4 Replace the color registration detection unit 5 If the message persists replace the DC controller PCB Calibrate the printer after replacing the DC controller CLJ 4500 4550 The printer has received and processed data and is waiting for a form feed Press CANCEL JOB and resend the last page of the job making sure that a form feed is sent with it or press Go to feed a new sheet of media through the printer CLJ 4600 5550 The printer has received and proc
142. ion 290 support 290 work instructions 288 work instructions 288 Y Yellow print cartridge light 2 ENWW Index 299 300 Index ENWW Supported Products hp color LaserJet 2500 2500L 2500n 2500tn 2500se hp color LaserJet 4500 4500n 4500dn hp color LaserJet 4550 4550n 4550dn 4550hdn hp color LaserJet 4600 4600dn 4600dtn 4600hdn hp color LaserJet 5500 5500n 5500dn 5500dtn 5500htn hp color LaserJet 8500 8500n 8500dn hp color LaserJet 8550 8550n 8550dn 8550gn 8550mtp 2003 Hewlett Packard Development Company LP www hp com 5851 1493
143. ists replace the delivery head assembly ENWW Troubleshooting control panel messages 57 Table 2 13 Alphabetical printer messages continued Message Description Action Check the event log message These instructions are for event log message The printer senses a media jam in the multi bin mailbox Event log message 13 22 05 1 Check for a jam in the delivery head assembly 2 Ensure free movement in the sensor flags PSExit2 on the delivery head assembly 3 Verify that the delivery roller fingers are over the ejector rollers on the delivery head assembly 4 Ifthe message persists replace the flat ribbon cable that connects to the delivery head assembly to the controller board PCA 5 If the message persists replace the multi bin mailbox controller board PCA 6 If the message persists replace the delivery head assembly The printer senses a media jam in the top face down output bin This message might be caused by the paper not reaching PS11 or by the paper toggling PS11 for an extended period of time 1 Open the left upper door remove the jammed media and close the left upper door Verify that PS30 PS10 PS11 and PS3 sensors and the surrounding area are clean N 3 Perform the sensor monitor test in the Service Mode Menu to verify that all paper path sensors are functioning correctly or to locate the paper jam 58 Chapter 2 Ser
144. le 2 52 Service menu items continued Product Service menu items CLJ 2500 continued Create the escape sequence ESC in the MS DOS editor window 1 Press and hold down the CTRL key Press the P key and then release both keys 2 Press the Esc key The editor will insert a left pointing arrow symbol 3 Type the PUL command line next to the arrow Send the PJL command to the printer 1 Open the File menu and select Save As to save and name the PJL command file 2 Open the File menu and select Exit to return to the MS DOS prompt window 3 Type in C Copy_filename txt LPT1 no quotation marks and press the ENTER key 4 The PJL file containing the PUL command is sent to the printer CLJ 4500 CLJ 4550 The Service menu provides the options listed below Press the ITEM key to scroll through the Service menu Serial number Transfer maintenance count Fuser maintenance count Color page count Total page count Registration page see page 196 Diagnostics mode see page 200 Paper path test see page 204 Developer test see page 204 Drum test see page 205 Door sensor test see page 206 Formatter diagnostics see page 202 Engine test see page 199 See the page number referenced opposite the item for more details ENWW Service mode functions 187 Table 2 52 Service menu items continued Product Service menu items CLJ 4600 CLJ 5500 Allows yo
145. ller PCB change from about 0 to about 3 5 V immediately after the copier is turned on Replace the developing rotary motor PCB Fuse developing rotary motor PCB Is the fuse FU701 FU702 on the developing rotary motor PCB blown Replace the fuse Replace the developing rotary motor If the problem cannot be corrected replace the dc controller PCB E032 CLJ 8550mfp The counter for the copy data fails to operate This error occurs when the illegal prevention bit of the control device goes to zero 0 when the open circuit detection mechanism is not disabled ENWW Troubleshooting control panel messages 161 E040 CLJ 8550mfp The holding plat lifter multi feeder is faulty This error occurs during multi feeder pick up when the holding plate position sensor PS1302 does not detect the holding plate even when the dc controller PCB has generated the holding plate solenoid SL4 ON signal Table 2 24 Cause and solutions for E040 error Cause Issue Solution Connectors Are connector J213 on the dc controller PCB connectors J641 J642 J643 and J647 on the printer side main relay PCB connectors J671 and J672 on the sub relay PCB connector J1302 of the holding plate solenoid and connector J102 of the power supply connected securely Connect the connectors securely Multi feeder tray PCF Does the voltage between connectors J1301 2 24 UH and J1301 1 GND on th
146. lors to look different Use standard paper Color selection process The user selects the color in the application but the operating system might convert or modify some characteristics of the color before sending the information to the printer driver The printer driver might also modify color characteristics depending upon the selected output mode Any color characteristics not addressed by the printer driver or applications are set to the product default The default color might not match the color the user selected 244 Chapter 4 Print quality ENWW Adjusting color balance These products feature automatic color calibration to provide high quality color output In situations that require critical color control you can manually adjust the density balance of the product s four toner colors CAUTION This procedure should only be performed by your network administrator Performing this procedure changes the color balance of the product by altering halftones and affects all print jobs Note Whenever you experience color related issues calibrate the product before trying any other steps Table 4 4 Adjusting color calibration Product Instructions CLJ 4500 Print a calibration page CLJ 4550 4 Press MENU until 2 Press ITEM until 3 Press SELECT to print the color balance calibration page The page consists of four color bars cyan magenta yellow and black and a box containing gray balance circles The factory de
147. lose the top cover Press GO if the Go light is blinking If the Attention light is still blinking then another jam is present See CLJ 2500 to clear jams from input areas on page 219 and CLJ 2500 to clear jams from output areas on page 220 CLJ 2500 to clear jams from input areas 1 2 Open optional tray 2 or optional tray 3 to expose the jam Complete one of these steps If the jam has already partially entered the printer see CLJ 2500 to clear jams from inside the printer on page 219 e If the jam is only in the input tray remove the jam by pulling it out by the visible edge Realign all of the paper in the tray and proceed to step 4 If you could not remove the jam from inside the printer or by pulling it out of the tray grasp the jam from the outside of the printer and carefully pull it free Push the paper down to lock the metal lift plate into place tray 2 only and slide the tray back into the printer Open the top cover close it again and then press GO if the Go light is blinking If the Attention light is still blinking then another jam is present See CLJ 2500 to clear jams from inside the printer on page 219 and CLJ 2500 to clear jams from output areas on page 220 ENWW Jams 219 CLJ 2500 to clear jams from output areas CAUTION Jams in these areas might result in loose toner on the page If you get toner on your clothes or hands wash them in cold water Hot water will set
148. lternates with A device failure has occurred on the specified drive pa Printing can continue for jobs that do not require the flash DIMM 2 To remove this message from the display turn the printer off and then on 3 If the message persists remove and reinstall the flash DIMM 4 Ifthe message persists replace the flash DIMM alternates with The printer received a PJL file system command that attempted to perform an illogical operation for example to download a file to a non existent directory pag Printing can continue 2 Turn the printer off and then on 3 If the message reappears there a problem may exist with the software program 72 Chapter 2 Service and troubleshooting ENWW Table 2 13 Alphabetical printer messages continued Message Description Action alternates with The printer received a PJL file system command that attempted to store something on the file system but was unsuccessful because the file system is full 1 Use HP Web Jetadmin software to delete files from the flash memory and try again N To remove this message from the display turn the printer off and then on alternates with The file system device is protected and no new files can be written to it 1 To enable writing to the flash memory turn off the write protection by using HP Web Jetadmin 2 To remove this message from the display
149. lutions for E351 error Cause Issue Solution Power Are the PCBs and connectors Make the connections secure supply connected securely If the power and turn the copier off and then supply is cut abnormally the copier on can indicate E351 when it warms up If this occurs turn the copier off and then on to reset ECO PCB Are the CO PCB and AP IP PCB Connect the PCBs securely AP IP PCB connected securely Replace the parts in the order indicated ECO PCB AP IP PCB E353 CLJ 8550mfp E353 is indicated in response to a mismatch of the serial number of the reader controller PCB and that of the EEPROM while the reader controller PCB is being replaced See the CLJ 8550 mfp service manual E355 CLJ 8550mfp E355 is indicated in response to a mismatch of the serial numbers of the copy module the reader controller PCB and the EEPROM while the reader controller PCB is being replaced as when the wrong serial number is entered If this code appears enter the correct serial number of the copy module using OPTION gt USER gt SERIAL in service mode ENWW Troubleshooting control panel messages 173 E401 CLJ 8550mfp The error shown on the touch screen display is in the ADF See the CLJ 8550 mfp service manual This error indicates that either the pick up motor M1 fails to rotate or the pick up roller sensor S5 is faulty In normal operation a flag is attached to the spindle of the pick up
150. matter e Defective paper sensors along the paper path might signal a false jam e Scraps of media left in the paper path can cause intermittent jams Always check that the paper path is clear when cleaning the printer and when clearing jams Also remove the fuser and carefully check it for jam debris ENWW Persistent jam troubleshooting 231 CLJ 4600 5500 jams in tray 1 Table 3 6 Causes for jams in tray 1 CLJ 4600 5500 Issue Solution Pickup roller is dirty worn or damaged Clean the pickup roller If it is still dirty after cleaning or if it is worn or damaged replace the pickup roller Separation pad is defective Clean the separation pad If it is still dirty after cleaning or if it is worn or damaged replace the separation pad Drive gears are damaged Check the drive gears in the paper pickup unit Replace the pickup drive assembly if the gears are damaged Multi purpose tray pickup solenoid is defective 1 Disconnect the connector J1020 for the multi purpose tray pickup solenoid from the DC controller PCB 2 Measure the resistance between the cable side connectors J1020 11 and J1020 10 3 If the measured resistance is NOT about 160 ohms replace the multi purpose tray pickup solenoid Pickup motor is defective Paper pickup assembly is defective Replace the paper pickup drive assembly Replace the paper pickup assembly DC controller PCB is defective
151. media is jamming ENWW Persistent jam troubleshooting 229 e whether any of the supplies are non HP non HP supplies are known to cause jams e whether the customer is storing the media correctly overloading the trays damaging the edge of the media during loading or using media that has already been fed through the printer CLJ 4500 4550 general paper path troubleshooting Use the following suggestions to isolate the cause of the problem After you have identified the cause use the tables that follow to find a recommended solution Note Use the paper path test in the Diagnostics menu to print pages while troubleshooting For more information see CLJ 4600 5500 paper path test on page 216 e View or print the event log and determine if a particular jam error occurs more often than others Try to identify a pattern e From the event log determine the frequency of a particular jam If a jam occurs repeatedly around the same page count consider this a single jam that the customer tried to clear e Try printing from all available input trays to identify whether the problem is isolated to one tray e Print the job in both simplex and duplex modes to identify if the problem occurs only in one mode or the other e Try printing on paper from an unopened ream that has been stored correctly If the jam does not occur with this media then the customer s media might be causing the problem e Ifthe jam occurs from when the printe
152. mory Type 0 ROM CLJ 4500 4550 1 RAM 2 font DIMM CLJ 8550 only Y Device Location 0 onboard CLJ 4500 4550 1 DIMM slot 1 2 DIMM slot 2 3 DIMM slot 3 4 DIMM slot 4 CLJ 4600 CLJ 5500 CLJ 8500 8550 5 DIMM slot 5 CLJ 8500 8550 6 DIMM slot 6 CLJ 8500 8550 7 DIMM slot 7 CLJ 8500 8550 8 DIMM slot 8 CLJ 8500 8550 ZZ Error Number 00 unsupported memory 01 unrecognized memory 02 unsupported memory size CLJ 4600 CLJ 5500 CLJ 8500 8550 03 failed RAM test 04 exceeded maximum RAM size CLJ 4600 CLJ 5500 CLJ 8500 8550 1 Verify that the DIMM is installed correctly 2 Turn the printer off and then on to reset the printer 3 Remove and replace the DIMM that caused the error 112 Chapter 2 Service and troubleshooting ENWW Table 2 14 Numerical error messages continued Message Description Action CLJ 4500 4550 CLJ 4600 CLJ 5500 CLJ 8500 8550 continued 05 invalid DIMM speed CLJ 4600 CLJ 5500 05 exceeded maximum ROM size CLJ 8500 8550 06 invalid DIMM speed check DRAM CLJ 8500 8550 07 DIMM is reporting incorrect checksum CLJ 8500 8550 10 DIMM address CLJ 8500 8550 11 PDC XROM out of bounds CLJ 8500 8550 12 could not make temporary mapping CLJ 8500 8550 13 invalid RAM type CLJ 8500 8550 14 DIMM not paired properly CLJ 8500 8550 15 bad firmware upgrade DIMM checksum CLJ 8500 8550 16 mo
153. motor 6 Cooling fan 258 Chapter 5 Illustrations ENWW Figure 5 4 CLJ 2500 printed circuit assemblies Reference CLJ 2500 component e Developing rotary toner level detection PCA Transfer belt home position detection PCA Density detection PCA Waste toner detection PCA Registration detection PCA De controller Sub high voltage power supply PCA High voltage power supply PCA O aOlIN oO oa HR wy Pp Power supply ENWW Major components 259 CLJ 4500 4550 major components a ko NN Bad Nay Pa Bo 8 Ey Re x ra KEAN Ze SAS SI Le NG gt Figure 5 5 CLJ 4500 4550 assembly location diagram 1 of 2 260 Chapter 5 Illustrations ENWW Figure 5 6 CLJ 4500 4550 assembly location diagram 2 of 2 Major components 261 ENWW ccs PS3104 amp PS3105 PS3001 o Figure 5 7 CLJ 4500 4550 sensor locations 262 Chapter 5 Illustrations ENWW This table corresponds to Table 5 7 on page 262 Reference CLJ 4500 4550 Reference CLJ 4500 4550 component component PS1 ITB unit life sensor PS12 Toner level sensor PS2 Registration paper sensor PS13 Waste toner sensor PS3 Last paper sensor PS14 Density sensor PS4 Multi purpose tray paper PS301 OHT sensor multi purpose sensor tray PCB PS5 ITB home position senso
154. move the Jetdirect card if it A is temporarily full is installed and then perform a Qo cold reset see page 194 Perform a NVRAM init see O page 190 Accessory error secondary messages CLJ 2500 NI NG O z IN blg gms If the printer has an Accessory error the Attention light Ready light and Go light are blinking press and hold Go and CANCEL JOB simultaneously to see the secondary error message You can also view the embedded Web server which provides a text message that corresponds to the error and its secondary light pattern 42 Chapter 2 Service and troubleshooting ENWW Table 1 Accessory error secondary messages CLJ 2500 Message Description Solution 8x yyyy EIO error 1 Remove the print server card A problem exists with the print and reinstall it to make sure server card that it is correctly installed 2 Make sure that you are using Oo CAUTION a supported print server You must turn off the printer card See chapter 7 for before inserting or removing the ordering information print een avoid d 3 To continue printing remove damaging the print server card the print server card from the EIO port and connect a parallel or USB cable You must change the port or reinstall the software 4 Ifthe print server card still is not working replace the print server ENWW Troubleshooting control panel messages 43 Table 1 Accessory error secondary messages CLJ 2500 continued
155. mp is not mounted or the lamp filament is broken Table 2 36 Cause and solutions for E218 error Cause Issue Solution Scanning Is the scanning lamp mounted Mount the lamp properly See lamp properly note below Replace the scanning lamp Is the problem corrected Replace the lamp Inverter PCB Are connectors J1002 and J1003 on the inverter PCB and connector J1602 on the reader controller PCB connected securely Connect the connectors securely Replace the inverter PCB Note If you have removed and then remounted the scanning lamp be sure to execute intensity adjustment in service mode FUNCTION 5 Misc R gt USE LAMP If you have mounted a new scanning lamp be sure to execute intensity adjustment and CCD adjustment in service mode FUNCTION gt Misc R gt LAMP ADJ and FUNCTION gt CCD gt CCD ADu respectively ENWW Troubleshooting control panel messages 171 E240 CLJ 8550mfp One of the following has occurred 1 The communication between the dc controller PCB and the reader controller PCB is faulty This error occurs when the DPPRDY signal is sent for less than 0 25 seconds from the reader controller to the dc controller PCB after power on 2 The communication between the dc controller PCB and the formatter or between the reader controller PCB and the formatter is faulty This error occurs when the signals between the formatter and the dc controller PCB or between the f
156. mware DIMM Formatter simplex Formatter duplex DC controller PCB Memory controller PCB Memory tag antenna PCBs Low voltage power supply PCB Pickup PCB Toner sensor PCB High voltage power supply PCB Fuser power supply PCB x The formatter is available with either simplex or duplex capability Be sure to use the correct formatter for the model of printer you are servicing The HP Color LaserJet 4600 and 4600n printers do not have duplex capability 270 Chapter 5 Illustrations ENWW CLJ 5500 major components Figure 5 16 CLJ 5500 assembly location diagram Reference CLJ 5500 component 1 Fuser drive assembly Drum drive assembly black Drum drive assembly cyan magenta Drum drive assembly yellow Drum drive assembly cyan magenta Disengaging drive assembly Paper pickup drive assembly Cassette O O NI oIa B d N Paper pickup assembly HIN o ETB assembly e Fuser assembly ENWW Major components 271 Pet ad o No TA Figure 5 17 CLJ 5500 location of switches Reference CLJ 5500 component 1 test print switch SW101 2 paper length detection switch SW1 SW2 SW3 3 paper width detection switch SW4 SW5 SW6 4 power switch 5 door open detection switch SW1 272 Chapter 5 Illustrations ENW
157. n no ac current is found in the fusing heater at the start of temperature control Table 2 17 Cause and solutions for E004 error Cause Issue Solution Upper With the fusing assembly removed is Check the upper fusing heater fusing there electrical continuity between and the upper thermal switch heater connectors J27F 3 HTUH and J27F Replace the fuser if problems are upper 4 HTUC on the fusing assembly found thermal side switch open circuit Lower Is there electrical continuity between Check the lower fusing heater fusing connectors J27F 3 HTLH and J26F and the lower thermal switch heater 4 HTLC on the fusing assembly Replace the fuser assembly if lower side problem parts are found thermal switch open circuit Connectors Are connector J222 on the dc Connect the connectors controller PCB connector J26 of the securely fusing assembly and connector J101 of the printer unit power supply connected securely Power Replace the power supply of the End supply printer unit Is the problem corrected Replace the dc controller PCB printer unit E009 CLJ 8550mfp Table 2 18 Cause and solutions for E009 error Cause Issue Solution Fusing Does the rated voltage of the fusing Check the product number of the assembly assembly match the printer s voltage fuser assembly if necessary replace the fusing assembly or the printer unit power supply ENWW Troubleshooting
158. n off switch 10 Move the upper lever blue to the left Replace the lever if it is cracked ENWW Troubleshooting control panel messages 75 Table 2 13 Alphabetical printer messages continued Message Description Action CLJ 8500 8550 continued 11 Replace the black print cartridge if it is deformed or damaged 12 Replace the remaining color toner sensor 13 Replace the controller board alternates with 2 CLJ 4600 5500 The cartridge is either not installed or not correctly installed in the printer 1 Insert the cartridge or make sure the cartridge is fully seated 2 Press HELP for detailed information 3 Press UP ARROW and Down ARROW to step through the instructions 4 If the error persists replace the cartridge 5 Verify that the connectors between the memory tag antenna memory controller board and the DC controller are seated properly 6 Replace the antenna PCB for the indicated color 7 Replace the memory controller PCB 8 Replace the DC controller PCB Calibrate the printer after replacing the DC controller See Calibrate Now CLJ 4600 and CLJ 5500 only on page 193 76 Chapter 2 Service and troubleshooting ENWW Table 2 13 Alphabetical printer messages continued Message Description Action The fuser is either not 1 Insert the fuser or make installed or not correctly sure that the installed installed in t
159. n the VTU door and remove the media stationary jam initial jam 1 1 VTU door is open Close the door 1 2 Tray 4 is open Close the tray Wrong paper size Load the correct size of paper or check loaded sensors 1 3 No paper in tray 4 Load paper or check sensors ENWW Troubleshooting printer accessories CLJ 8500 8550 211 212 Chapter 2 Service and troubleshooting ENWW Jams Contents General paper path checklist 020 cece eee eee 214 Paper path troubleshooting cc eee eee eee eee 215 Paper path test 0 00 ccc eee 215 JAMS eraen duraia a Pama annua hh Ad eee ae datas ete 218 Clas 2500 jaMS sees ed ew a aba eee eee weed NTG anak Aa 218 CLJ 4500 4550 jam locations 0 2 0 0 cece ees 221 CLJ 4600 5500 jam locations 000 0c 223 CLJ 8500 8550 jam locations a 226 Persistent jam troubleshooting 0 0 0 eee eee 229 GCL 2500 fcr cine Senet ee eee a AA 229 GET 4500 4550 cras ene a a bees heed eae eee Roe eee 229 CLJ 4600 5500 2 eee 229 CLJ 8500 8550 sosuri cisse nisar aaia iE aR E da alee we 238 ENWW 213 General paper path checklist Verify that media is correctly loaded in the input trays and that all length and width guides are set correctly Clean the printer Debris in the paper path such as toner and paper dust inhibits free movement of media through the printer and blocks the sensors Change the printer input and output selections to determine if th
160. n to send a An incorrect printer Reset the printer driver Check for an job to the driver is selected the correct port setting printer Other devices are Disconnect the other devices and connected to the try to print again parallel port ENWW Basic troubleshooting 21 Environmental specifications Table 2 2 Operating environment specifications Product Item Operating Storage CLJ 2500 Temperature 15 to 32 5 C 20 to 40 C printer and print 59 to 90 5 F 4 to 104 F cartridge Relative humidity 10 to 80 95 or less CLJ 4500 Temperature CLJ 4550 Recommended 20 to 26 C 68 to 79 F 0 to 35 C 32 to 95 F Allowed 15 to 30 C 59 to 86 F 20 to 40 C 4 to 104 F Humidity Recommended 20 to 50 RH 35 to 85 RH Allowed 10 to 80 RH 95 or less Altitude Allowed 0 to 3100 m 0 to 10 000 ft O to 3100 m O to 10 000 ft CLJ 4600 Temperature Recommended 17 to 25 C 63 to 77 F 0 to 35 C 32 to 95 F Allowed 10 to 30 C 50 to 86 F 20 to 40 C 4 to 104 F Humidity Recommended 30 to 70 RH 35 to 85 RH Allowed 10 to 80 RH 95 or less Altitude Allowed 0 to 2600 m O to 8530 ft 0 to 2600 m O to 8530 ft 22 Chapter 2 Service and troubleshooting ENWW Table 2 2 Operating environment specifications Product Item Operating Storage CLJ 5500 Tempera
161. n within the carousel 3 Verify that the carousel is monitored by PS11 If drive motor wiring PS11 fails or is improperly harness is firmly seated connected a 54 2 error into connector J203 of appears Another indicator the developing PCB of this is that the carousel 4 Verify that PS10 is starts to rotate then stops working correctly and not immediately A 54 2 error excessively dirty clean if message can also occur if necessary and that the the sensor is installed wiring harness is firmly backwards seated into both the sensor assembly and connector J206 of the developing PCB ENWW Troubleshooting control panel messages 115 Table 2 14 Numerical error messages continued Message Description Action CLJ 4500 4550 continued 5 The following URL provides help with cartridge installation and removal http www hp com go lisupplies Verify that PS11 is connected and functioning properly Verify that all connectors to the developing PCB and the DC controller PCB are firmly seated Verify that the rotary drive assembly is working Replace it on older units that have more than 50K of life 116 Chapter 2 Service and troubleshooting ENWW Table 2 14 Numerical error messages continued Message Description Action CLJ 8500 8550 The print cartridge carousel is not working correctly This could be caused by an obstruction in the carousel p
162. ned every 100 pages detects paper and formatter and to then turns off the transfer the toner image transfer positive to the paper bias 284 Chapter 5 Illustrations ENWW Table 5 3 Basic operation sequence CLJ 4600 Period Purpose Remark LSTR From the end of the To deliver the paper out The last rotations period lasts last PRINT period until of the printer and to until the instant the formatter rotations the ETB motor clean the ETB sends a print command Then period stops the initial rotations period starts again CLJ 5500 Table 5 4 Basic operation sequence CLJ 5500 Period Purpose Remark WAIT From the time the To clear a potential During this period the wait period power switch is turned on until the ETB cleaning is completed on the drum surface and to clean the ETB printer checks the toner level and detects whether the cartridges are present The printer also executes the pulse width modulation adjustment color registration adjustment and image density calibration control as required STBY From the end of the To keep the printer When the formatter standby period WAIT or LSTR ready to print sends a sleep period or last rotation command the printer until the formatter enters PowerSave inputs a print mode command or until the power is turned off INTR From immediately To stabilize the initial rotations period after t
163. nformation about jam error messages see Jams on page 218 92 Chapter 2 Service and troubleshooting ENWW Table 2 14 Numerical error messages continued Message Description Action ID A connection with the card 1 Press SELECT to resume in the specified slot has printing alternates with broken Note A loss of data will occur CLJ 4500 2 Check that all cables are connected to the ElO ports and that the EIO board is seated properly Or 3 Turn the printer off and on to reset it CLJ 4550 4 If possible print to another network printer to verify that the network is working properly CLJ 4600 CLJ 5500 CLJ 8500 8550 ENWW Troubleshooting control panel messages 93 Table 2 14 Numerical error messages continued Message Description Action CLJ 8500 8550 A beam detect laser scanner error has occurred on the previous page The page will be reprinted and the job will continue 1 Open and close the front door of the printer to remove any remaining pages from the printer Turn the printer off and on to reset the printer Reconnect connector J1001 on the laser driver PCA and connector J205 on the controller board Reconnect connector J2 on beam detect PCA relay connector J40 and connector J211 on the controller board If the problem persists replace the laser scanner unit If after re
164. ng roller 1 Replace the sensor feeding home position sensor Is the problem roller 1 corrected home position sensor PS23 Duplexing Disconnect connector J2003 of the Replace the duplexing feeding feeding duplexing feeding clutch and measure clutch clutch the resistance between connectors CL5 J2003 1 and J2003 2 on the harness side Is it about 1400 ENWW Troubleshooting control panel messages 163 Table 2 25 Cause and solutions for E054 error continued Duplexing motor M8 Duplexing driver PCB Replace the duplexing motor Is the problem corrected Replace the duplexing motor M8 Replace the duplexing driver PCB E055 CLJ 8550mfp The duplexing driver PCB has detected that the horizontal registration guide has moved in excess of the maximum distance from when the home position was detected Table 2 26 Cause and solutions for E055 error Cause Issue Solution Horizontal Is the horizontal registration guide Mount the guide correctly registration mounted correctly guide Horizontal Is the horizontal registration guide Replace the lever registration home position sensor lever damaged guide home position sensor PS25 lever Horizontal Is the horizontal registration guide drive Replace the worn or cracked registration gear worn or cracked gear guide drive gear Duplexing Are connectors J2006 and J2005 of the Connect the connec
165. ng the DC controller CLJ 8500 8550 The paper diverter inside the right upper door is out of position causing an error in feeding from tray 1 2 Turn the printer off and 1 Open the right upper door and check for a media jam or misfed media on to reset the printer 136 Chapter 2 Service and troubleshooting ENWW Table 2 14 Numerical error messages continued Message Description Action alternates with CLJ 4600 CLJ 5500 A memory tag error was detected X Description 3 CPU 4 power supply 1 Turn the printer off and then on 2 Ifthe error persists replace the memory PCB 3 If the error persists replace the DC controller PCB Calibrate the printer after replacing the DC controller CLJ 8500 8550 The main motor M4 is not working properly X Description 0 general error 1 startup error 2 rotation error _ Turn the printer off and on to reset the printer 2 Reconnect connector J219 and relay connector J1 on the controller board 3 Replace the main motor M4 4 Reconnect connectors J641 to J643 and J647 on the main relay PCA connectors J671 and J673 on the subrelay PCA connector J102 on the power supply and connector J227 on the controller board 5 Check electrical continuity between connector J641 1 24 VB and J642 3 PMP on the main relay PCA when the door switch SW641 is turned on If no ele
166. no electrical continuity exists replace the main relay PCA Check the electrical continuity between connector J644 1 PBK and J644 2 PMP on the main relay PCA when the door switch SW644 is turned on If no electrical continuity exists replace the black print cartridge on off switch Check the electrical continuity between connector J642 1 PYMC and J642 2 PBK on the subrelay PCA when the door switch SW673 is turned on If no electrical continuity exists replace the print cartridge cover switch in the subrelay PCA 118 Chapter 2 Service and troubleshooting ENWW Table 2 14 Numerical error messages continued Message Description Action CLJ 8500 8550 continued 11 Check electrical continuity between connector J642 1 PYMC and J648 1 24 VAR on the main relay PCA when the door switch SW642 is turned on If no electrical continuity exists replace the main relay PCA 12 Measure the voltage across connector J648 1 24 VAR and J648 3 GND on the main relay PCA after the printer is turned on If the voltage is not 24 V replace the main relay PCA 13 Reconnect connectors J704 and J706 on the carousel motor PCA and connector J220 on the controller board 14 Reconnect connector J43 on the carousel position sensor and reconnect relay connector J42 and connector J207 on the controller board 15 Measure the voltage across connector J220 A6 RLSRO
167. nsors at the paper exit and entrance While running the sensor monitor test from the Service Mode Menu verify that sensors 8 and 9 on the printer control panel indicate 1 on when toggled Note This procedure will not work if the left lower cover interlock is not defeated If the error message persists replace the duplexer ENWW Troubleshooting control panel messages 51 Table 2 13 Alphabetical printer messages continued Message Description Action The printer senses a media jam in the fuser area The printer expected a page to come through the fuser but the paper has not toggled PS1903 or PS1903 has been toggled an extended period of time WARNING Do not touch the fuser it could be very hot and could cause burns pa Open the left lower cover remove the jammed media and close the left lower cover 2 On the left side of the fuser check the fuser exit flag and the reflective absorptive sticker that the sensor PS1903 uses 3 Perform the sensor monitor test in the Service Mode Menu Toggle PS1903 and check to make sure that sensor 2 on the printer control panel indicates 1 on when toggled 52 Chapter 2 Service and troubleshooting ENWW Table 2 13 Alphabetical printer messages continued Message Description Action Check the event log message These instructions are for event log message There is a jam in the 2 0
168. nu again NVRAM is put back in its original form and an error is logged in the Fault log When the Attention LED is on then there has been an error in the test Press the MENU key to get to the Fault log menu the ITEM key to see the different log messages and the VALUE key to scroll the message back and forth ENWW Diagnostics mode CLJ 4500 4550 201 Table 2 56 Formatter diagnostics CLJ 4500 4550 Test Description REPEAT If set to yes the tests will run continuously until interrupted In the 4550 series only CANCEL JOB will abort the test ON FAULT The following will occur for each setting BREAK The test will stop when a failure occurs PAUSE Stops the test for a short period of time then resume with the remaining tests CONT Continues to execute the tests even when a failure occurs ROM CRC 4500 series only Tests the firmware ROM for correct functionality DRAM Tests the on board RAM and the DIMMs SRAM 1 Tests the SRAM inside the ASIC SRAM 2 Tests the SRAM physically mounted on the formatter NVRAM Do not interrupt the NVRAM test Doing so will cause the printer to lose all NVRAM values Tests the formatter NVRAM This test takes 18 minutes to run and should only be used when NVRAM values are being lost In almost all cases this test should never be run In the 4550 series only CANCEL JOB will abort the test Do not turn off the printer or corruption of the NVRAM could result if the N
169. nued Message Description Action 10 Measure the voltage across connector J647 B11 24UH and J647 4 GND on the main relay PCA after the printer is turned on If the voltage is not 24 V replace the main relay PCA continued 11 Check the drum cartridge on off switch lever on the printer Set the lever at the correct position if it is disconnected Replace the lever if it is cracked 12 Reconnect connector J209 and reconnect relay connectors J47 and J48 on the controller board 13 Replace the controller board 80 Chapter 2 Service and troubleshooting ENWW Table 2 13 Alphabetical printer messages continued Message Description Action The printer has detected that the transfer drum is not installed All doors must be closed for the printer to detect the transfer drum If the right upper cover interlock is defeated this error will occur unless the density sensor is covered with paper 1 Install the transfer drum before attempting to print 2 Take the transfer drum out and reinstall it 3 Make sure that the transfer drum is installed If the transfer drum is not already installed install the transfer drum If the transfer drum is already installed turn the printer off verify that the transfer drum is in the correct position and turn the printer on again 4 Reconnect connector J1101 on the density sensor PCA intermediate connecto
170. o cycle through the printer control panel menus From the Information Menu select Press SELECT to print the menu map 30 Chapter 2 Service and troubleshooting ENWW Event log The event log lists the printer events including printer jams service errors and other printer conditions To print an event log Table 2 7 Printing an event log Product Instructions CLJ 2500 The last three events appear on the Configuration page For a full list of events see the HP Color LaserJet 2500 Toolbox click the Device tab and then click Information CLJ 4500 Press MENU until appears on the CLJ 4550 printer control panel display Press ITEM until i appears on the display Press SELECT to print the event log CLJ 4600 Press SELECT to enter the CLJ 5500 Press DOWN ARROW to highlight Press SELECT to select Press DOWN ARROW to highlight Press SELECT to select CLJ 8500 Press MENU to cycle through the printer control panel CLJ 8550 menus From the Information Menu select ala BP WO N ajo N Press SELECT to print the event log ENWW Printing information pages 31 Supplies Status page The Supplies Status page lists the remaining life of HP print cartridges and HP imaging drums It also lists the estimated number of pages that can be printed with the remaining supplies number of pages printed and other supplies information The following information is included on the supply status page of most printers
171. odels require different procedures make sure that you find the exact wording of the error message on the control panel display Model numbers are not specified for every message in the table Note Self explanatory messages are not included Table 2 13 Alphabetical printer messages Message Description Action A user has attempted to select a menu value while the printer control panel is locked Contact the printer administrator to gain access to the control panel The duplexer is not correctly installed ey Verify that the power cord is connected to the duplexer and the short power cord from the duplexer is connected to the printer 2 Turn the printer off and then on 3 If the error continues verify that the duplexer is correctly installed 4 If the error persists replace the duplexer The printer cannot duplex because the rear output bin is open bh Close the rear output bin door 2 If the error message persists turn the printer off and then on ENWW Troubleshooting control panel messages 49 Table 2 13 Alphabetical printer messages continued Message Description Action alternates with The printer cannot duplex because the rear output bin is open or the media is not supported by the duplexer 1 Close the rear output bin 2 If the error message persists turn the printer off and then on Verify that the duplexer supports
172. oes not open replace that print cartridge Also check for a damaged shutter mechanism in the printer Inspect the cartridge drive assembly in each print cartridge If any are damaged replace the assembly for that print cartridge Attaching roller is defective Make sure the attaching roller is clean and the spring is in place If the roller is damaged replace the ETB Calibrate the printer after replacing the ETB Paper leading edge sensor is defective Replace the pickup PCB DC controller PCB is defective Replace the DC controller PCB Calibrate the printer after replacing the DC controller CLJ 4600 5500 jams in the top cover Table 3 10 Causes for jams in the top cover CLJ 4600 5500 Issue Solution Fuser paper sensor or sensor lever is defective Make sure the fuser paper sensor lever moves smoothly and is set in place Replace the lever if it is damaged Replace the sensor if it is defective Fuser sleeve or pressure roller does not rotate smoothly If the fuser drive gears are worn or damaged replace the fuser Fuser inlet guide is dirty or has built up toner Clean the fuser inlet guide ENWW Persistent jam troubleshooting 235 Table 3 10 Causes for jams in the top cover CLJ 4600 5500 Issue Solution Fuser sleeve or pressure roller is dirty worn or damaged Fuser delivery sensor or sensor lever is defective Clean the fu
173. of the duplex unit and the input trays and duplex unit the duplex tray 7 13 4 Jamin duplex unit Inspect the rear 14 13 12 Paper did not clear the input sensor in time Table 3 2 Jam locations and associated error messages CLJ 4500 rear of the duplex unit and the duplex tray 1 13 25 Paper in the paper path is too 8 13 10 Jam in duplex reverse unit long Check the Tray 1 area Check the Inspect the rear of the duplex unit and entire paper path the duplex tray 2 13 24 Paper in the paper path is too 9 113 6 Jam in fusing area Check the short Check the Tray 1 area Check the fuser assembly output assembly and entire paper path duplex unit 3 13 23 Irregular paper jam in the paper 10 13 5 Jam in fusing area Check the path Check the Tray 1 area Check the fuser assembly output assembly and entire paper path duplex unit 4 13 21 Door open jam Checktherear 11 i 5 Paper jam i i door duplex cover and rear output alternates wit door Check the middle 13 20 Jam in paper feed area Check front drawer Check and pull out the the entire paper path fuser 5 113 13 Jam in duplex paper feed area 12 13 5 Paper jam Check in rear of Inspect the rear of the duplex unit and drawer Check the rear of the middle the duplex tray front drawer Reseat the transfer roller 6 13 12 Jam in duplex paper feed area 13 13 1 Jamin input feed area Check the Inspect the rear of the duplex
174. of the sensor if not detected or removed when rear door is opened and closed 1 Press the ITEM key until panel 2 Press the SELECT key to activate the test is displayed on the front The front panel displays A through F with a binary value below it All the doors and drawers should be closed In this state the display will show all 0 s Open the doors and drawers one at a time to verify correct functionality If operating correctly the 0 will change to a 1 If a 1 is displayed with all doors and drawers closed there is a bad switch or connection ENWW Diagnostics mode CLJ 4500 4550 207 Door sensor test CLJ 8500 8550 2 000 sheet input unit 1 Set the DIP switches on the 2 000 sheet input unit s controller PCA for the sensor test See page 430 for an explanation of the settings 2 For each paper sensor a Open the paper tray and the VTU on the 2 000 sheet input a unit b Remove the metal spring that holds the sensor unit in place secured by 1 screw see figure 153 callout 2 and figure 154 callout 2 c Pull out the sensor unit 4 Use the switch that is located on the unit s power supply to switch to diagnostic mode 5 Manually activate the sensor e When you activate the sensor the bottom service LED on the controller PCA comes on When you release the sensor the LED goes off If the LED does not come on there is a problem with the sensor Replace the corresponding field replaceable unit 6 To stop the tes
175. om the printer hard disk by using the printer drivers or a disk management program 2 To clear all data from the printer hard disk reformat the printer hard disk at the printer control panel a Press MENU until appears on the display b Press ITEM until appears on the display c Press SELECT to reformat the printer hard disk alternates with FI 5 CLJ 4600 5500 The printer received a PJL file system command that attempted to store something on the file system but was unsuccessful because the file system is full 1 Use the HP Web Jetadmin software to delete files from the ElO disk drive and try again 2 To remove this message from the display turn the printer off and then on alternates with FOR MENUS f 2D CLJ 4600 5500 The file system device is protected and no new files can be written to it 1 To enable writing to the disk turn off the write protection by using HP Web Jetadmin 2 To remove this message from the display turn the printer off and then on 68 Chapter 2 Service and troubleshooting ENWW Table 2 13 Alphabetical printer messages continued Message Description Action CLJ 8500 8550 A user has attempted to save to the printer hard disk while the printer hard disk is write protected See the system administrator for access to the printer hard disk A printer door has been opened d
176. on was released then repeat steps 1 through 5 10 The printer LEDs will begin cycling from front to back The cold reset process runs until the printer is in the Ready state CLJ 4500 Select from the Reset menu CLJ 4550 CLJ 4600 1 Turn the printer on CLJ 5500 11 As the printer performs its power on sequence press and hold SELECT until all three lights on the control panel are lit 12 When appears on the display press UP ARROW unti appears on the display 13 Press SELECT The printer will perform a cold reset and then continue its power on sequence 194 Chapter 2 Service and troubleshooting ENWW Product Instructions CLJ 8500 1 Print a configuration page to record the previous printer CLJ 8550 settings 2 Turn the printer off 14 Hold down GO while turning the printer on Release GO after COLD RESET appears on the printer control panel display F in English appears on the display for one second to verify that the key sequence has been recognized followed by the power on self test message Once the power on self test is finished the message displays in English ENWW Hard disk initialization 195 Registration page Product Instructions CLJ 2500 Not applicable CLJ 4500 Note CLJ 4550 You must set the registration values if both the formatter and DC controller are replaced at the same time or if the formatter was previously installed in another printer If the DC controller is r
177. onnector at sensor PS6 is firmly seated Clean the sensor If the error persists replace sensor PS6 CLJ 4500 Or CLJ 4550 A beam detect error or laser failure has occurred Turn the printer off and on to reset the printer Verify that connectors J1102 on the laser driver PCB and J1008 on the DC controller are seated properly Verify that connectors J551 on the beam detect PCB and J1006 on the DC controller are seated correctly If the error persists replace the laser scanner unit 108 Chapter 2 Service and troubleshooting ENWW Table 2 14 Numerical error messages continued Message Description Action CLJ 8500 8550 A beam detect error or laser failure has occurred 1 Tum the printer off and on to reset the printer 2 Reconnect connector J1001 on the laser driver PCA and connector J205 on the controller board 3 Reconnect connector J2 on the beam detect PCA relay connector J40 and connector J211 on the controller board 4 If the error persists replace the laser scanner unit 5 If the error persists replace the controller board alternates with CLJ 4600 CLJ 5500 A printer error has occurred X Description 1 beam detect error 2 laser error Y Description 0 no color K black C cyan M magenta Y yellow pa Press SELECT to continue 2 Turn the printer off and then on 3 Reseat the conn
178. optional 500 sheet paper feeder and duplex unit installed See the following tables for the associated error messages Table 3 1 Jam locations and error messages CLJ 4500 1 113 11 Paper in the paper path is too 8 13 3 Jam in duplex reverse unit long Check the Tray 1 area Check the Inspect the rear of the duplex unit and entire paper path the duplex tray 2 13 10 Paper in the paper path is too 9 113 2 Jam in fusing area Check the short Check the Tray 1 area Check the fuser assembly output assembly and entire paper path duplex unit 3 13 9 Irregular paper jam in the paper 10 13 1 Jam in fusing area Check the path Check the Tray 1 area Check the fuser assembly output assembly and entire paper path duplex unit 4 13 8 Door open jam Check the rear 11 13 1 Paper jam door duplex cover and rear output alternates with 4 door of Fr Check the middle 13 7 Jam in paper feed area Check the front drawer Check and pull out the entire paper path fuser ENWW Jams 221 Table 3 1 Jam locations and error messages CLJ 4500 of the duplex unit and the duplex tray 5 13 6 Jam in duplex paper feed area 12 13 1 Paper jam Check in rear of Inspect the rear of the duplex unit and drawer Check the rear of the middle the duplex tray front drawer Reseat the transfer roller 6 113 5 Jam in duplex paper feed area 13 113 0 Jam in input feed area Check Inspect the rear
179. or PS32 1 Open the VTU and remove any media 2 Verify that the paper entry sensor PS31 moves freely 3 Verify that the feed separation and pickup rollers are properly seated 4 If the problem persists open the VTU and override the VTU closed sensor PS35 Perform a paper path test from the 2 000 sheet input unit and verify that the feed rollers are advancing the paper If the rollers do not rotate check the connections at the pickup assembly and the controller PCA in the 2 000 sheet input unit 5 If the rollers rotate and drop down but do not advance the paper replace the feed and separation rollers by using the maintenance kit 6 If the rollers do not rotate or do not drop down replace the pickup assembly 7 Ifthe problem persists replace the VTU which includes P531 54 Chapter 2 Service and troubleshooting ENWW Table 2 13 Alphabetical printer messages continued Message Description Action Check the event log message These instructions are for event log message There is a jam in the 2 000 sheet input tray Event log message 13 11 3 lt x gt X description 1 At power on the paper entry sensor PS31 in the VTU is active B At power on the paper exit sensor PS32 in the VTU is active 1 Open the vertical transfer unit VTU and remove any media 2 Verify that PS31 and PS32 in the VTU move freely 3 If either PS31 or PS32 is damaged
180. or communication between the ACC controller PCB and an accessory This error occurs when the read write parity check of data is faulty and communication does not end within a specific time Table 2 40 Cause and solutions for E677 E678 E679 errors Cause Issue Solution Accessories Are the power cables of the Turn the power off and then on power accessories and the communication 7 Replace the ACC controller accessories cable to the printer unit connected PCB securely ENWW Troubleshooting control panel messages 175 E710 E711 CLJ 8550mfp These are IPC initialization errors E710 occurs when the IPC sync register for the copy module and the copy module related accessories fail to go to one 1 within three seconds E711 occurs when data has been written 10 times or more to the error register within 1 5 seconds during the communication between the copy module and copy module related accessories Table 2 41 Cause and solutions for E710 E711 errors Cause Issue Solution Copy module Turn the copy module rear power End switch off and then on then turn on the control panel power soft switch Is the problem corrected Reader Replace the reader controller PCB Is Refer to the Service Manual for controller the problem corrected the reader unit accessory in PCB question accessories connected to the copy module E712 CLJ 8550mfp The error shown on the touch screen display is in
181. ore information on printer memory options see the service manual ENWW Troubleshooting control panel messages 83 Table 2 13 Alphabetical printer messages continued Message Description Action The resource save area for the printer personality is full Fonts downloaded to the printer RAM might have been deleted Turn the printer off and on to clear the printer RAM The printer hard disk is new or has been formatted for another file system Press SELECT to reformat the printer hard disk All data that is currently on the printer hard disk will be lost _ 2 If you do not want to initialize the printer hard disk wait until the message clears 10 seconds or press GO and the disk will not be initialized This will render the disk non functional but the configuration page will show that the disk is installed This is a request to confirm initialization of the printer hard disk see PRESS SELECT TO INITIALIZE DISK above Initialization will perform a high level check of the disk pa If you want to proceed with initialization press SELECT If you do not want to initialize the printer hard disk wait until the message clears 10 seconds or press GO and the disk will not be initialized This will render the disk non functional but the configuration page will show that the disk is installed 84 Chapter 2 Service and troubleshooting ENWW
182. ormatter and the reader controller PCB cannot be exchanged for a specific time after power on Table 2 37 Cause and solutions for E240 error Cause Issue Solution Interface Is the interface cable used to connect Make the connections secure cable the copy module and the printer unit and turn on the copy module e 2 Se Video connected securely Replace the video interface PCB interface Further are the copy module power or the reader controller PCB PCB read cord and the printer unit power cord reader connected securely controller PCB PS PCL Turn the unit off and remove the Replace the formatter board formatter and turn on the printer unit de controller and copy module as one as a Replace the dc controller PCB PCB copier Is E240 indicated E243 CLJ 8550mfp The communication between the control panel CPU PCB and the reader controller PCB is not possible 20 seconds or more after power on Table 2 38 Cause and solutions for E243 error Cause Issue Solution Connectors Are connector J901 on the control Connect the connectors securely panel CPU PCB and connector J1608 on the reader controller PCB connected securely Control Replace the control panel CPU PCB End panel CPU _ Is the problem corrected Replace the reader controller PCB reader PCB controller PCB 172 Chapter 2 Service and troubleshooting ENWW E351 CLJ 8550mfp Table 2 39 Cause and so
183. orted when the customer attempts to restart the printer e Duplexing can lead to TWJ because of the fusing of the first side The temperature of the fuser causes some moisture to vaporize out of the media the pressure of the rollers may induce curl in the paper On the second pass TWJ might occur depending the orientation of the curl e The reports of TWJ increase dramatically in the United States during the summer months and are typically related to areas with high relative humidity greater than 50 percent relative humidity 238 Chapter 3 Jams ENWW Print quality Contents Printer cleaning page 0 20 eee 240 Life expectancies of print cartridges 0 0 cece eee ee 241 Image quality 22 aa we eee ee See ee ee EEE eed Be 242 Drum functional test 0 0 ee eee 242 Print density test and color checks a 243 Understanding color variations cece eee eee 243 Common causes of color variation aa 244 Adjusting color balance 0 0 0 eee eee 245 Imaging drum defects 0 0 cece eee 250 ENWW 239 Printer cleaning page Table 4 1 Printer cleaning page Product Instructions The following procedure must be performed from the HP Color LaserJet 2500 Series Toolbox which is supported for Windows 98 NT 4 0 Me 2000 and XP To clean the engine when the computer is running a different supported operating system see the Readme on the software CD ROM or vi
184. ote information pages The formatter must be connected to a power print source to perform an engine test Print an engine test l see page 199 For the The engine test is CLJ 2500 turn the not successful printer off and then on An error indicator Consult the lists of control panel again before printing an jjght message light messages on page 2 to identify engine test appears on the and correct the error The engine test should control panel print without paper feed problems or CLJ 2500 only See Troubleshooting control panel print quality problems Printer Status and messages on page 34 Also print a Demo page Alerts software or a configuration page generates an error see page 26 message Poor print quality See Image quality on page 242 4 ls the software Software is not Uninstall and then reinstall the installed correctly installed or an error printer software Make sure that you occurred during use the correct installation software installation procedure and the correct port setting 5 Does the printer print A USB cable anda When both cables are connected from the computer parallel cable are the USB automatically disables Connect the parallel both connected to itself Disconnect both cables and cable or USB cable the printer then reinstall the one you want to to the printer and to use the computer Use a The cable is not Reconnect the cable word processing connected correctly applicatio
185. paper does not properly fall away from the Intermediate Transfer Drum ITD Paper with high moisture content will jam in some printers Paper with a rough edge is more susceptible to this type of jam e The number one cause of TWJ is print media with moisture content beyond appropriate specification 4 to 6 by weight If the media has too much moisture the stiffness decreases dramatically and causes the paper not to fall away from the ITD properly e The CLJ 8500 8550 is the only LaserJet product with an Intermediate Transfer Drum The curvature of the drum and the natural curl of some paper can lead to TWJ Heavier media 24 Ib and greater falls away from the ITD more easily because of its weight and stiffness e Paper is hygroscopic it gives up or absorbs moisture depending on the environment Paper left overnight in a tray may absorb enough moisture to cause problems the following day Likewise paper left unwrapped might also absorb enough moisture to cause problems e Paper that is stored outside an office environment might require as many as 2 weeks of storage near the printer before it returns to a moisture content within PAE r is reported as 13 00 10 in the event log For a printer with a High Capacity Output HCI tray 13 x1 31 and 13 x1 3B are usually present because pages are being fed through the Vertical Transfer Unit VTU when the jam occurs in the printer If the customer fails to clear these pages the jams are rep
186. paper pickup roller replacing 15 parallel ports troubleshooting 21 part numbers service manuals iv parts 290 Pause Resume button CLJ 4600 5500 4 PCAs CLJ 2500 259 CLJ 8500 8550 282 PCBs CLJ 4500 4550 266 CLJ 4600 270 CLJ 5500 276 personalities troubleshooting 41 50 pickup roller replacing 15 ports troubleshooting 21 40 power electrical specifications 23 troubleshooting 19 unplugging printer 16 power on sequences CLJ 2500 283 CLJ 4600 284 CLJ 5500 285 ENWW pre troubleshooting checklist 16 print cartridges carousel errors 115 117 developer test CLJ 4500 4550 204 error messages 92 life expectancies 241 lock toner lever message 82 non HP 83 replacing customer responsibilities 15 status lights 2 status page printing 32 toner out message 88 troubleshooting 74 printer languages troubleshooting 41 50 products supported iv R Ready light accessory error messages CLJ 2500 42 CLJ 2500 locating 2 CLJ 2500 messages 35 CLJ 2500 status 34 CLJ 4500 4550 locating 3 CLJ 4600 5500 locating 4 CLJ 8500 8550 locating 5 service error messages CLJ 2500 46 recycling 32 registration area jams 55 registration numbers CLJ 4500 4550 197 registration page printing 196 repetitive defects troubleshooting 249 replacing supplies customer responsibilities 15 reset cold 194 restoring factory default settings 194 rollers replacing 15 Rotate Carousel button 2 36 S scan buffer errors 48 145 secondary error messages
187. per The engine tries to check the OHT sensor and receives an error message ENWW Troubleshooting control panel messages 95 Table 2 14 Numerical error messages continued Message Description Action CLJ 8500 8550 The printer was expecting one type of media to be fed from an input tray and a different type was fed For example the printer was expecting transparencies and plain paper was fed 1 2 Verify that the correct Open and close the front door to remove the page from the printer media is loaded in the input tray and the printer control panel is configured correctly Clean the detection windows of OHT sensors 1 and 2 Reconnect connectors J1801 and J1802 of OHT sensors 1 and 2 connector J214 on the controller board and relay connector J17 If the error persists replace OHT sensors 1 and 2 If the error persists replace the controller board alternates with CLJ 4600 CLJ 5500 A printer error has occurred X Description 1 unknown misprint error 2 beam detect misprint error media feed error size no VSYNC error media feed error type ETB detection error feed delay error noise VSREQ ONON OW Press SELECT to continue or press HELP for more information If the message persists turn the printer off and then on 96 Chapter 2 Service and troubleshooting ENWW Table 2 14 Numerical error messages continued Me
188. place the waste toner sensor assembly 2 Replace the imaging drum 120 Chapter 2 Service and troubleshooting ENWW Table 2 14 Numerical error messages continued Message Description Action 54 5 PRINTER A waste toner sensor has 1 Turn the printer off and CLJ 4500 4550 malfunctioned then on to reset the printer 2 Remove the drum cartridge and clean the waste toner detection window by using a dry cloth 3 Clean the waste toner sensor unit at the printer side by using a dry cloth 4 Check the light guide and clean it if necessary Replace the light guide if the ends are scarred 5 Reconnect the waste toner sensor unit connector and the DC controller PCB connector J1009 correctly 6 Ifthe error persists replace the waste toner sensor PS13 ENWW Troubleshooting control panel messages 121 Table 2 14 Numerical error messages continued Message Description Action CLJ 4500 4550 The OHT sensor has reported an error condition This can be caused by contamination in the connectors a blocked sensor or a defective sensor 1 Remove the ITB and verify that the OHT sensor prism is in place Lift the registration flap and verify that the OHT sensor is not blocked 3 Remove the ITB drawer and inspect the drawer connectors for contamination such as a piece of paper 4 Ifthe error persists verify that all connectors are firmly s
189. placing the laser scanner unit the problem persists replace the controller board 94 Chapter 2 Service and troubleshooting ENWW Table 2 14 Numerical error messages continued Message Description Action CLJ 8500 8550 Tray 1 is configured for a specific media size but the printer detects a different size being fed from tray 1 For example the printer was expecting a letter sized page but detected that a legal sized page was fed instead 1 Verify that the correct media size width and length is loaded in tray 1 N Verify that the paper guides are set correctly 3 Load the requested size media in tray 1 Or press GO to print on the default size 4 Verify that the media width sensor on the paper guides is working properly 5 Reconnect connector J1701 on the tray 1 width detection PCA relay connector J33 and connector J208 on the controller board 6 If the error persists replace the tray 1 pick up assembly alternates with CLJ 4500 4550 A tray is configured for a specific media type but the printer detects that a different media type is loaded The most common cause for this error is a jam at registration plate under 1 Verify that the correct media type is loaded in the input tray and the printer control panel is configured correctly 2 Clean the detection the ITB where the customer Ng orOHT sensors does not remove the pa
190. ply If the error persists replace the controller board ENWW Troubleshooting control panel messages 105 Table 2 14 Numerical error messages continued Message Description Action CLJ 8500 8550 A fuser drive or power unit error has occurred in the fuser 1 Turn the printer off and on to reset the printer Verify that the fuser is completely seated inside the printer If the error persists replace the fuser kit If the error persists replace the power supply If the error persists replace the controller board CLJ 8500 8550 A heater error has occurred in the fuser bh Turn the printer off and on to reset the printer Verify that the fuser is completely seated inside the printer Reconnect connector J222 on the controller board connector J26 on the fuser and connector J101 on the power supply If the error persists replace the fuser kit If the error persists replace the power supply If the error persists replace the controller board 106 Chapter 2 Service and troubleshooting ENWW Table 2 14 Numerical error messages continued Message Description Action CLJ 4500 4550 The fusing motor M1 drives the fusing assembly the paper transport web assembly the ITB lift mechanism the transfer roller the transfer roller lift mechanism and the face down output delivery drive as
191. r PS3001 Paper feed detection sensor PS6 Fusing unit pressure release PS3101 Reversing unit paper sensor sensor PS7 Delivery paper sensor PS3102 Face up sensor PS8 Cassette paper sensor PS3103 Reversing unit stationary paper sensor PS9 Face down tray paper full PS3104 Duplex pick up paper sensor sensor PS10 Carousel home position PS3105 Side registration home sensor position sensor PS11 Toner cartridge press sensor ENWW Major components 263 Figure 5 8 CLJ 4500 4550 printer solenoids and clutches Reference CLJ 4500 4550 component SL1 Multi purpose tray pick up solenoid SL2 Paper pick up solenoid CL1 Registration clutch CL2 ITB unit separation clutch CL3 ITB cleaning roller separation clutch CL4 Secondary transfer roller separation clutch 264 Chapter 5 Illustrations ENWW Figure 5 9 CLJ 4500 4550 motors and fans Table 5 1 CLJ 4500 4550 motor and fan locations Reference CLJ 4500 4550 Reference CLJ 4500 4550 components components M1 Fusing motor M5 Toner cartridge motor M2 Pick up motor FM1 Large fan M3 Carousel motor FM2 Small fan M4 Drum motor FM3 Front fan ENWW Major components 265 O Figure 5 10 CLJ 4500 4550 PCB locations Table 5 2 PCB assembly Reference CLJ 4500 4550 component 1 Developing PCB DC controller PCB Interconnect PCB Paper size sensor PCB Paper feed PCB assembly Formatter PCB
192. r is turned on check the paper path for small torn pieces of paper Also check for broken sensors or flags and check for loose or defective connections e Ifthe paper is torn folded or wrinkled typically along the leading edge inspect the paper path for items that could be causing the damage e Ifthe customer is using non HP supplies try replacing those supplies with genuine HP supplies to see if the problem goes away e f necessary instruct the customer on proper media storage correct loading technique and printer operation Make sure the customer knows not to grab paper in the output bin during duplex printing 230 Chapter 3 Jams ENWW CLJ 4500 4550 paper path checklist Verify that media is correctly loaded in the input trays and that all length and width guides are set correctly Clean the printer Toner and paper dust in the paper path can inhibit free movement of media through the printer and can block the sensors Use the paper path test in the Diagnostic menu to vary the input selections of the printer to determine if the problem is associated with a particular area of the printer Worn rollers or separation pads can cause multifeeds Check the condition of the pickup rollers and separation pads Bent separation tabs on the front corners of the input trays can cause misfeeds and multifeeds Replace the tray if necessary Defective paper tray switches can cause jams by communicating the wrong paper size to the for
193. r messages continued Message Description Action CLJ 4600 CLJ 5500 CLJ 8500 8550 A critical firmware error has occurred that caused the processor on the formatter to abort operation This type of error can be caused by invalid print commands corrupt data or invalid operations In some cases electrical noise in the cable can corrupt data during transmission to the printer Other causes include poor quality parallel cables poor connections defective EIO devices or home grown applications Note On rare occasions when the formatter is at fault the error is usually indicated by a 79 Service Error 4 Ifthe message persists 5 Turn the printer off 7 Remove all ElO devices 8 Turn the printer on 1 Press CANCEL JOB to clear the print job from the printer memory 2 Turn the printer off and then on 3 Try printing a job from a different software application If the job prints go back to the first application and try printing a different file If the message appears only with a certain software application or print job contact the software vendor for assistance with different software applications and print jobs disconnect all the printer cables that connect it to the network or computer Remove all memory DIMMs or third party DIMMs from the printer Do not remove the firmware DIMM in slot J1 from the printer 98 Chapter 2 Service and troubl
194. rds been removed from the printer CAUTION Hewlett Packard recommends the use of HP products in this printer Use of non HP products can cause problems that require service not covered by the Hewlett Packard warranty or service agreements ENWW Troubleshooting 17 Hardware e Are the ITB or ETB unit and fusing unit seated correctly e Are all doors drawers and covers closed e For the CLJ 4500 Is the duplex unit power cord plugged into the printer and is the paper duck power supply plug connected to the duplexer Configuration e Has the printer hardware or software configuration changed Or could the problem be associated with any specific software Contact the Customer Care Center for software related problems e Could the problem be related to network configuration changes Remove the printer from the network and make sure that the failure is associated with the printer before beginning troubleshooting 18 Chapter 2 Service and troubleshooting ENWW Basic troubleshooting Does the printer perform the initialization and power on steps See Does the printer turn on successfully on page 19 Does the control panel show ready on page 20 Does the event log show repeating errors See Troubleshooting control panel messages on page 34 OFFLIME OFF aH See Is the printer e Does media jam in the printer See Jams on page 218 e Will the printer print information pages See Printing
195. re than one set of firmware upgrade DIMMs CLJ 8500 8550 17 not enough DRAM to run CLJ 8500 8550 N EIO slot number CLJ 8500 8550 1 bottom EIO slot 2 top EIO slot CLJ 4600 CLJ 5500 A DIMM is installed in both 168 pin DIMM Slot 4 and 100 pin DIMM Slot 5 This is an invalid configuration DIMMs cannot be installed in both of these slots at the same time Remove one of the DIMMs or move one of the DIMMs to a different slot ENWW Troubleshooting control panel messages 113 Table 2 14 Numerical error messages continued Message Description Action CLJ 4500 4550 An internal power failure has occurred 1 Turn the printer off and then turn it on 2 Ifthe error persists replace the high voltage power supply 3 Check the fuser to make sure that no jams are present CAUTION 54 1 errors can be caused by damaging the thermistor while clearing fuser jams 4 Make sure that no fluctuation in the power supply to the printer is occurring Check that the electrical specifications are met 5 If the error persists replace the low voltage power supply CLJ 8500 8550 The temperature humidity sensor in the printer has malfunctioned The temperature humidity sensor is located below tray 2 1 Reconnect connector J801 and relay connector J55 on the temperature humidity sensor and connector J206 on the controller board 2 Ifthe
196. ress DOWN ARROW The printer will initialize NVRAM and then continue its power on sequence Not applicable ENWW NVRAM Initialization 191 Hard disk initialization Table 2 54 Hard disk initialization Product Instructions CLJ 2500 series Not applicable CLJ 4500 Not applicable CLJ 4550 CLJ 4600 Turn the printer on CLJ 5500 As the printer performs its power on sequence press and hold the PAUSE RESUME button until all three lights on the control panel are lit Press ENTER The display should show Press SELECT The printer will initialize the hard disk and continue its power on sequence From the host computer delete data from the printer hard disk using the printer drivers or a disk management application To clear all data from the printer hard disk reformat the printer hard disk from the printer control panel To reformat the printer hard disk a Press MENU until i appears on the display b Press ITEM until appears on the display Press SELECT to reformat the printer hard disk 192 Chapter 2 Service and troubleshooting ENWW Calibration bypass CLJ 4600 and CLJ 5500 only During certain diagnostic procedures on the CLJ 8550 or CLJ 8550 you will need to bypass the automatic calibration that is performed whenever the printer is turned on To bypass calibration 1 2 oa Ff Ww Turn the printer on and watch the control panel display When the display begins showing the
197. rical error messages eee eee 91 Numbered error codes for the CLJ 8550mfp 154 Service mode functions cece eee 183 To gain access to the service mode 183 Service menu items 000 cee eee 186 NVRAM Initialization ee ee 190 To perform NVRAM initialization aa 190 Hard disk initialization eee eee 192 Calibration bypass CLJ 4600 and CLJ 5500 only 193 Calibrate Now CLJ 4600 and CLJ 5500 only 193 Gold RESET an pang bees NANG eee ee ee eet 194 To perform a cold reset eee ee eee 194 Registration page eee eee 196 Setting registration numbers CLJ 4500 and CLJ 4550 only 197 vi AA 199 Diagnostics mode CLJ 4500 4550 eee eee 200 Gaining access to the diagnostics mode 201 Engine diagnostics CLJ 4500 4550 004 203 Troubleshooting printer accessories CLJ 8500 8550 209 Service LED descriptions cae eaee 210 3 Jams General paper path checklist a 214 Paper path troubleshooting ee eeeee 215 Paper path test 000 2 ees 215 ANS sehen a acs aaa ed a an Ma ade Rena ale Gade a pag gn NA led 218 CLUJ 2500 JaME i ri i ea a a ua ee 218 CLJ 4500 4550 jam locations 0 0c eee 221 CLJ 4600 5500 jam locations n n nananana 223 CLJ 8500 8550 jam locations n n nananana 226 Persist
198. ries only this test will continue running until the CANCEL JOB key is pressed Door Selected test will run once Sensors Selected test will run in a continuous loop In the 4550 series only CANCEL JOB will abort the test ENWW Diagnostics mode CLJ 4500 4550 203 Developer test CLJ 4500 4550 The developer test rotates the carousel stopping at each print cartridge and rotating the developer sleeve For the best view of the carousel and the print cartridge sleeves remove the drum cartridge The drum drawer must be closed before the test can run 1 Press the ITEM key until is displayed 2 Press the SELECT key to run the test The front panel displays while the test is running Watch the carousel and make sure that the print cartridge developer sleeve rotates The sequence is black followed by a pause then magenta cyan and finally yellow The test takes approximately 35 seconds While the developer test is running you will see the drum turn if it is installed as well as the drive gear for the ITB 204 Chapter 2 Service and troubleshooting ENWW Drum test CLJ 4500 4550 The drum test exercises the drum drive mechanism In addition the fuser motor is turned on to allow the lift cams for the ITB to be rotated into the ITB up position 1 Press the ITEM key until displays 2 press the SELECT key to run the test The front panel displays E E ii while the test is running Watch to see if the ITB lift
199. rk instructions 288 Embedded web server 0 289 Obtaining service notes cee 289 To gain access to service notes 289 Service websites a a etl an La NLA eae ed 290 HP Customer Care Online 1 0 2 2 0 00 cee 290 HP learning center 0 0 0 c ee eee 290 PANS acot iad eat PUGAD WS Ma eal gh PA AA 290 Index Contents vii viii Contents ENWW Control panel Contents Using the control panel 0 0 eee eee 2 Control panel layoutS 0 0 ce eee eee 2 Setting the control panel display language 6 Upgrading the firmware 0 cece ete 8 Using Internet Explorer for flashable firmware 9 Using HP Web Jetadmin 0 0 cee tee 9 Using a manual download for parallel connections 10 Using FIP a namna aude dude AA DADA KAN GARIN BRA as haa 10 ENWW 1 Using the control panel This section has information about the layout of each product s control panel and how to set the control panel display language Control panel layouts CLJ 2500 control panel layout Figure 1 1 Control panel layout CLJ 2500 1 Black print cartridge light 6 Imaging drum light 2 Cyan print cartridge light 7 CANCEL JOB button 3 Magenta print cartridge light 8 Attention light amber 4 Yellow print cartridge light 9 Ready light green 5 ROTATE CAROUSEL button 10 GO button and Go light green 2 Chapter
200. rror messages CLJ 2500 42 Attention with Ability to Continue messages CLJ 2500 39 CLJ 2500 lights and buttons 2 CLJ 4500 4550 lights and buttons 3 CLJ 4600 5500 lights and buttons 4 CLJ 8500 8550 lights and buttons 5 error messages alphabetical list 49 error messages CLJ 2500 34 error messages numerical list 91 language setting 6 menu map 30 service error messages CLJ 2500 46 Service menu 186 service mode 183 troubleshooting 16 19 copy module error messages CLJ 8550mfp 154 CPR sensor 65 customer support 290 Cyan print cartridge light 2 D Data light CLJ 4500 4550 locating 3 CLJ 4600 5500 locating 4 CLJ 8500 8550 locating 5 DC controller errors 124 default settings restoring 194 demonstration page printing 28 troubleshooting 21 using 28 density sensor 66 120 density test 243 developer test 204 diagnostics density test 243 developer test 204 door sensors CLJ 4500 4550 206 drum test 205 242 engine test 199 mode CLJ 4500 4550 200 paper path test 215 path sensors CLJ 4500 4550 205 DIMMs DRAM controller errors 145 errors 112 144 flash troubleshooting 72 ENWW troubleshooting 44 DIP switches 2 000 sheet input tray for CLJ 8500 8550 210 disk failure errors 67 full errors 68 initialization 84 192 multiple not supported 88 write protected 68 69 documentation ordering iii part numbers iv service notes 289 work instructions 288 door sensor test CLJ 4500 4550 206 doors error messages 60 Down arro
201. rs J75 and J46 and connector J206 on the controller board 5 Measure the voltage across connector J704 1 24 VAR and GND on the density sensor PCA after the printer is turned on If the voltage is not about 24 V replace the density sensor PCA 6 Replace the controller board ENWW Troubleshooting control panel messages 81 Table 2 13 Alphabetical printer messages continued Message Description Action The transfer unit is either not 1 Insert the transfer unit or installed or not correctly make sure the installed installed in the printer transfer unit is fully seated 2 Press HELP for detailed information 3 Press UP ARROW and DOWN ARROW to step through the instructions 4 lf the error persists verify that the ETB connectors J36 and J38 on the ETB and J1111 on the DC controller PCB are good Replace connectors as necessary 5 Replace the ETB 6 Replace the DC controller PCB Calibrate the printer after replacing the DC controller See Calibrate Now CLJ 4600 and CLJ 5500 only on page 193 _ The blue lever inside the clear Open the front door of the door is not locked printer open the clear door and swing the blue toner lock lever on the carousel to the right 2 Remove the print cartridge and then reinstall it making sure the cartridge is all the way in the printer 3 Swing the blue toner lock lever on the carousel to the left until it clicks and then
202. s and hold SELECT at the printer control panel while ming the printer on Continue holding SELECT until 7 in English appears on the control panel display and then release the SELECT button When it appears on the control panel display press VALUE repeatedly until the appropriate language appears Press SELECT to save the language selection An asterisk appears next to the selected language Press GO After the printer warms up appears on the control panel display in the selected language Note If the message does not appear in the language that you selected press the printer standby button power switch and repeat the instructions for changing the ca language Press SELECT to open the Press DOWN ARROW to highlight and then press SELECT Press DOWN ARROW to highlight and then press SELECT Press DOWN ARROW to highlight and then press SELECT Press UP ARROW or DOWN ARROW to select the appropriate language and then press SELECT to set the selection 6 Press PAUSE RESUME 6 Chapter 1 Control panel ENWW Product CLJ 8500 CLJ 8550 ENWW Procedure plese ang hold SELECT while turning the printer on When in English appears on the control panel display for approximately one second release SELECT When the printer has restarted appears on the display Note Only VALUE SELECT and GO are active while the display language is being configured All other buttons are ignored I
203. seat the formatter 4 If the problem persists replace the firmware DIMM 5 If the problem persists replace the formatter and then calibrate the printer CLJ 8500 8550 A hardware error has occurred X Description 01XX IO ASIC register error 02XX video ASIC register error 03XX IDE ASIC register error 1 Tum the printer off Disconnect all communication cables and EIO cards Turn the printer on N Run extended formatter diagnostics from the Service Mode Menu to troubleshoot the failure 3 If the problem persists without the communications connected replace the formatter board 152 Chapter 2 Service and troubleshooting ENWW Table 2 14 Numerical error messages continued Message Description Action CLJ 4500 4550 CLJ 4600 CLJ 5500 CLJ 8500 8550 A critical ElO failure has occurred X indicates the slot number of the device YYYY YYY in the case of the CLJ 8500 8550 indicates the error type 1 Turn the printer off and on to reset the printer 2 Ifthe error persists reseat the EIO card 3 If the error persists replace the EIO card ENWW Troubleshooting control panel messages 153 Numbered error codes for the CLJ 8550mfp These error messages appear on the copy module LCD at the time they occur A history of errors can be reviewed through the copy module service mode COPIER gt DISPLAY gt ERR See Serv
204. sembly A 50 7 fuser error appears when PS6 detects no motion within the fuser Photosensor PS6 is the fusing unit pressure switch 1 Tum the printer off and on to reset the printer N Remove the left side cover of the printer Verify that the fusing motor M1 connector is seated firmly into J102 of the feed PCB Ensure that the connector at J110 of the feed PCB is firmly seated this connector contains the wiring for PS6 which provides fuser motion feedback o Note Closely inspect the mechanical linkage The gears along the gear drive path can bind the gears which will prevent M1 from rotating 4 Ifthe error persists observe the drive shaft of M1 while turning on the printer If this shaft does not rotate the failure is related to the motor drive circuitry Refer to the printer wiring diagram to verify that connectors J102 and J106 of the feed PCB are firmly seated If the error persists replace the fusing motor and the feed PCB in sequence ENWW Troubleshooting control panel messages 107 Table 2 14 Numerical error messages continued Message Description Action CLJ 4500 4550 continued 5 If the shaft rotates both forward and reverse and the 50 7 fuser error appears the cause of the error is related to the motion feedback circuitry Remove the fusing assembly and verify that the sensor flag is in good condition and functional Verify that the c
205. ser sleeve or pressure roller If it is damaged replace the fuser Make sure the fuser delivery sensor lever moves smoothly and is set in place Replace the lever if it is damaged Replace the sensor if it is defective Fuser delivery roller is worn Replace the fuser Fuser delivery roller drive gears are worn or damaged Replace the fuser Face down delivery roller is defective Replace the fuser DC controller PCB is defective Replace the DC controller PCB Calibrate the printer after replacing the DC controller 236 Chapter 3 Jams ENWW CLJ 4600 5500 jams in the duplex path Table 3 11 Causes for jams in the duplex path CLJ 4600 5500 Issue Solution Oblique rollers are worn or Replace the oblique rollers damaged Oblique roller drive gears are worn Replace the ETB unit Calibrate the printer after or damaged replacing the ETB Duplex feed guide is damaged Replace the ETB unit Calibrate the printer after replacing the ETB ENWW Persistent jam troubleshooting 237 CLJ 8500 8550 Use this checklist to identify and resolve Transfer Wrap Jams TWJ Make sure to educate the customer on why Transfer Wrap Jams occur and how to prevent them in the future You cannot resolve Transfer Wrap Jams by replacing any hardware on the printer Extensive testing and analysis has pointed out these observations e Transfer Wrap Jams occur when the leading edge of the
206. sing there electrical continuity between thermal switch Replace the fuser heater connectors J27F 3 HTUH and J27F assembly if any problems are upper 4 HTUC on the fusing assembly found thermal side switch open circuit Lower Is there electrical continuity between Check the lower fusing heater and fusing connectors J26F 3 HTLH and J26F the lower thermal switch Replace heater 4 HTLC on the fusing assembly the fuser assembly if any lower side problems are found thermal switch open circuit Upper or Is the upper or lower thermistor in Mount the thermistor properly lower even contact with the upper lower thermistor _ fusing roller Upper or Is the upper or lower thermistor Clean the area of contact with the lower soiled upper or lower fusing roller thermistor Connector Are connector J222 on the dc Connect the connectors securely controller PCB and connector J26 of the fusing assembly connected securely ENWW Troubleshooting control panel messages 155 Table 2 15 Cause and solutions for E000 E003 errors continued Power Replace the power supply of the Replace the dc controller PCB supply printer unit Is the problem corrected printer unit CAUTION If E001 or E003 is indicated be sure to discharge the error memory capacitor C259 on the dc controller PCB after troubleshooting the problem as it may contain error memory Short out JP201 on the dc controller PCB to discharge C259 see t
207. sit http Awww hp com support clj2500 1 Make sure that the product is turned on and in the Ready state 2 Open the HP Color LaserJet 2500 Series Toolbox 3 On the Troubleshooting tab click Cleaning Page and then click Print A page with a pattern prints from the product 4 Atthe product remove any media from tray 1 multipurpose tray 5 Remove the page that printed and load it face down into tray 1 6 At the computer click Clean For even better results repeat this procedure several times The CLJ 4500 4550 do not include this feature The CLJ 4600 5500 do not include this feature The CLJ 8500 8550 do not include this feature 240 Chapter 4 Print quality ENWW Life expectancies of print cartridges Table 4 2 Life expectancies of print cartridges Product Description Estimated life at 5 coverage CLJ 2500 Black print cartridge 5 000 pages Cyan print cartridge 4 000 pages Yellow print cartridge 4 000 pages Magenta print cartridge 4 000 pages CLJ 4500 Black print cartridge 9 000 pages CLJ 4550 Cyan print cartridge 6 000 pages Yellow print cartridge 6 000 pages Magenta print cartridge 6 000 pages CLJ 4600 Black print cartridge 9 000 pages Cyan print cartridge 8 000 pages Yellow print cartridge 8 000 pages Magenta print cartridge 8 000 pages CLJ 5500 Black print cartridge 13 000 pages Cyan print cartridge 12 000 pages Yellow print cartridge 12 000
208. splay language once it has completed initialization Select a new language when prompted 86 Chapter 2 Service and troubleshooting ENWW Table 2 13 Alphabetical printer messages continued Message Description Action The Service Mode power up key sequence has been entered The printer remains in Service Mode until you press Go Press Go to close Service Mode alternates with The tray is loaded with media that is longer or shorter in the feed direction than the size that is configured for the tray y Adjust the side and rear media guides against the paper If the media used is Letter Letter R A4 A4 R Executive B5 JIS B5 R A5 A5 R A3 11 by 17 or Legal size the tray switch should be set to N switch to 4 other media sizes The tray switch must be set before the size can be selected at the control panel 3 Reset the paper size in the Paper Handling menu ENWW Troubleshooting control panel messages 87 Table 2 13 Alphabetical printer messages continued Message Description Action The printer is out of the specified toner and cannot continue lt color gt Cyan magenta yellow or black 1 Replace the print cartridge specified 2 If the message persists reconnect connector J226 on the controller board and connector J5001 on high voltage converter 1 PCA 3 Check the contact on the black pr
209. ssage Description Action CLJ 4500 4550 A firmware error occurred that caused the processor 1 Turn the printer off and on to reset the printer aah 1E toimatier ak 2 Verify that all cables are operation This type of error connect d can be caused by invalid print commands corrupt 3 Cancel all print jobs and data or invalid operations then resend Try to In some cases electrical isolate any offending noise in the cable can print job corrupt data during 4 Delete the print job from transmission to the printer the Windows spooler or Other causes include poor from the print server quality parallel cables poor connections or home grown 5 If the formatter pan applications assembly or DC controller was removed Note make sure that the ribbon On rare occasions when cable between the DC the formatter is at fault controller and the the error is usually interconnect PCB is indicated by a 79 Service connected Error Note The printer control panel reads 5 and the display is dark if the ribbon cable is not connected CLJ 4500 4550 To verify that the formatter is functioning properly run the formatter tests that are available in the diagnostics mode If the formatter passes the formatter is not defective Do not replace the formatter See the note in the Description column for information about the formatter ENWW Troubleshooting control panel messages 97 Table 2 14 Numerical erro
210. ssages are printed as well The CLJ 4550 event log can be printed from the Information menu If both the formatter and DC controller are replaced at the same time use service mode to execute the color plane registration sequence to ensure optimum print quality 1 Hold down the CANCEL JOB key and SELECT key while turning the printer on until the display is blank and the 3 LEDs are on 2 Press the right side of the MENU key and then press the SELECT key Service mode will be displayed on the front panel briefly followed by two rows of asterisks The printer will go through its normal start up cycle then display on the front panel Entering the Service Mode Menu 1 Froma state press MENU until J appears 2 Press ITEM the left side of the key and VALUE simultaneously 3 Press the MENU key to access the Service menu 184 Chapter 2 Service and troubleshooting ENWW Table 2 51 Gaining access to the service mode Product Instructions CLJ 4600 The Service menu is PIN protected for added CLJ 5500 security When you select from the list of menus you are prompted to enter your 8 digit PIN number The PIN for this printer is 04550002 1 Press UP ARROW or DOWN ARROW until the first digit of the PIN is displayed 2 Press SELECT to save the digit The display will replace the digit with an asterisk 3 Repeat steps 1 and 2 until all eight digits are entered 4 Press RIGHT or LEFT
211. ssue reported by the life Replace the formatter test when replacing the fuser This error might also occur during the boot cycle ENWW Troubleshooting control panel messages 101 Table 2 14 Numerical error messages continued Message Description Action CLJ 4500 4550 When this error message appears you can scroll through the printer control panel to obtain all of the error information No action required CLJ 4500 4550 A request is not understood This error message is generated when the I O card does not support a command that was sent to it Check the command being sent the I O card might not support a particular feature CLJ 4500 4550 This error message is generated when the I O card receives a control panel menu action that it does not recognize Verify the action being sent CLJ 4500 4550 A fuser error has occurred X Description 1 low temperature error 2 fuser warm up service 3 high fuser temperature 4 faulty fuser 5 fuser voltage mismatch verify that you have not installed a 110 V fuser ina 220 V printer or vice versa 6 fuser heater cutoff 7 fuser motor malfunction see recommended action for 50 7 Fuser error Note Closely inspect the mechanical linkage The gears along the gear drive path can bind the gears which will prevent M1 from rotating 102 Chapter 2 Service and troubleshooting ENWW Table 2 14 N
212. supplying the scanning lamp heater with power for two minutes starting at 0 C or less It can also occur when the temperature drops to 0 C or less during temperature control E215 The scanning lamp fluorescent lamp thermistor has a short circuit This error occurs when the scanning lamp thermistor detects 170 C or more when the fluorescent lamp ON signal FLON is off including power on Table 2 33 Cause and solutions for E211 E215 errors Cause Issue Solution Disconnect connector J1610 of the reader controller PCB and measure the resistance between connectors J1610 5 GND and J1610 6 FL_TH on the harness side Is it 100 Q or less or 100 KQ or more The reader controller PCB is faulty Lamp heater Disconnect connector J2039 of the lamp heater and measure the resistance between connectors J2039 2 GND and J2039 3 FL_TH Is it 100 Q or less or 100 K Q or more Replace the lamp heater Flat cable Are connector J1610 connectors Connect the connectors between J2037 and J2015 of the flat cable and securely J2037 and connector J2039 of the lamp heater 78 Replace the flat cable Or J2015 and connected securely check each of the connectors connectors Reader Is the voltage 38 V between See the CLJ 8550 mfp service controller connectors J1611 1 GNDU and manual PCB J1611 2 38V on the harness side of Replace the reader controller the reader controller PC
213. t turn the power supply switch back to operational mode and set the DIP switches on the controller PCA to the off position 208 Chapter 2 Service and troubleshooting ENWW Troubleshooting printer accessories CLJ 8500 8550 Status LED descriptions CLJ 8500 8550 The status light on the front of the CLJ 8500 8550 provides status information Table 2 61 Status LED on the 2 000 sheet input unit CLJ 8500 8550 State Description Resolution Solid green The unit is on and ready None required Solid The unit is experiencing a Isolate the problem using one amber hardware malfunction of the other procedures described in this section Flashing The unit has a media jam or a Clear the jam or remove the amber page needs to be removed page from the 2 000 sheet input unit even if the page is not jammed The VTU might be open Close the door Off The printer might be in Power Press Go Save mode The unit is not receiving Check the power supply and power the power cables ENWW Troubleshooting printer accessories CLJ 8500 8550 209 Service LED descriptions Figure 2 1 Rear view of 2 000 sheet input unit CLJ 8500 8550 1 Service LEDs 2 DIP switches 3 Power supply Note Be sure to turn the power supply off and set all DIP switches to the off position when you finish the test or the unit will not work The DIP switch is ON if it is to the right The DIP switch is OFF if it is to the left Note To go from
214. t number 1 Press the ITEM key until is displayed 2 Press the ALUE key to change the number to the number required 3 Press the SELECT key Printing from Tray 2 and 3 1 Press the ITEM key until Fi 2 Press the SELECT key Zor 2is displayed 3 Measure from the left side of the paper to the lines and find the line that is 13 mm 0 5 in from the edge of the paper lf the number for the line is different then the current number 1 Press the ITEM key until 2 Press the ALUE key to change the number to the number required 3 Press the SELECT key 198 Chapter 2 Service and troubleshooting ENWW Engine test The test patterns either contain vertical lines or horizontal lines depending on the product When an image defect appears a test print can be made to identify the problem The test print can be made by pressing the test print switch located on the right side of the printer see figure below The engine test does the following e Verifies that the print engine is functioning correctly the formatter PCB is completely bypassed during an engine test e Isolates printer problems e Checks and adjusts registration e Can be activated with the formatter PCB removed Table 2 55 Engine test button Product Location of engine test button The engine test switch is inside tray 1 on the left side just below the front cover To print an engine test turn the product off and then on again open tray 1
215. t test page Run the paper path test from the default settings Tray 2 no duplex and one copy To specify other settings scroll down the menu and select the setting then scroll back up and select f to start the test e Source Select Tray 1 Tray 2 or Tray 3 if the optional 500 sheet paper feeder is installed e Duplex Enable or disable 2 sided printing e Copies Set the numbers of copies to be printed the choices are 1 10 50 100 and 500 216 Chapter 3 Jams ENWW CLJ 8500 8550 paper path test The paper path test simulates a page moving through the paper path from input trays 1 2 and 3 to the output bins Removing some engine parts such as the transfer drum prevents paper from feeding completely It is possible to select the input and output trays for the test by indicating in the imenu the input tray and output bins to use by selecting ON or OFF Multiple input trays can be selected but only a single output can be selected A page is fed from each input tray to the selected output If a jam occurs during the test the test should continue with the next input tray in the list CAUTION Because jam detection is OFF in this mode an unattended test might result in damage to the printer The pickup rollers feed rollers registration roller transfer belt press clutch CL4 cleaning roller press cam and solenoid SL1 fuser transfer belt and output feed roller can be tested during the paper path test For sa
216. tationary jam The media has not passed through the top facedown output bin delivery sensor PS11 after PS11 detects the media within approximately 2 4 seconds normal mode letter sized media landscape e 9 6 seconds overhead transparency mode letter sized media landscape e 7 2 seconds high gloss mode letter sized media landscape e 4 2 seconds normal mode 1 1 by 17 inch sized media e 17 0 seconds overhead transparency mode 1 1 by 17 inch sized media e 12 7 seconds high gloss mode 11 by 17 inch sized media Wrong media size feed jam The controller board detects media size with the registration roller paper sensor PS1 and it stops the engine if the media size differs more than 15 mm between the specified media size and the actual media size On the other hand if the difference is within 7 5 to 15 mm or 3 7 mm or less the media is automatically delivered Door open jam The sensors listed below detect the media when a cover is opened or closed registration paper roller sensor PS1 pick up unit paper sensor PS17 e separation sensor PS5 e top face down output bin delivery sensor PS11 e fusing delivery sensor PS1903 Initial residual jam The sensors listed below detect the media the specified time after the power switch is turned ON e separation sensor PS5 fusing delivery sensor PS1903 228 Chapter 3 Jams ENWW Persistent jam troubleshooting
217. that the flipper shaft is in place 4 If the message persists replace the flipper assembly 5 If the message persists replace the multi bin mailbox controller board PCA 1 Check for a jam at the double belt system and delivery head assembly 2 Ensure free movement of the double belt both belts 3 Ensure parallel position of the double belt system 4 Verify that the metallic tape is in place and in good condition 5 If the message persists replace the transport belt motor M5 6 If the message persists replace the multi bin mailbox controller board PCA 7 If the message persists replace the delivery head assembly 56 Chapter 2 Service and troubleshooting ENWW Table 2 13 Alphabetical printer messages continued Message Description Action Check the event log message These instructions are for The printer senses a media jam in the multi bin mailbox Event log message 13 22 04 1 Check for a jam in the delivery head assembly 2 Ensure free movement in the sensor flags PSExit1 on the delivery head assembly 3 Verify that the delivery roller fingers are over the ejector rollers on the delivery head assembly 4 Ifthe message persists replace the flat ribbon cable that connects to the delivery head assembly to the controller board PCA 5 If the message persists replace the multi bin mailbox controller board PCA 6 If the message pers
218. the intermediate transfer belt is open Note This drawer is called the ITB drawer but is referred to as the middle front drawer for end users Switch SW1 indicates the drawer is open When the drawer is closed a plastic protrusion on the lower left corner of the drawer pivots an arm that allows SW1 to toggle to the open position 1 Close the ITB drawer 2 If the message persists remove the printer s left side cover and inspect the mechanical linkage that closes SW1 3 Refer to the wiring diagram to verify the wiring the two wire connector should be firmly seated to SW1 and the wiring harness should be firmly seated to connector J1003 of the DC controller PCB 4 Ifthe message persists use an ohmmeter to verify functionality of SW1 SW2 indicates whether the printer s toner access cover is closed When the toner access cover is closed a lever is pushed down This in turn rotates a pivot forward opening the top cover switch SW2 1 Close the top cover 2 If the message persists remove the printer s top assembly cover and check all mechanical linkages associated with Swe 3 Verify that the connector on J1003 of the DC controller PCB is firmly seated ENWW Troubleshooting control panel messages 61 Table 2 13 Alphabetical printer messages continued Message Description Action Switch SW5 monitors the closing of the printer s upper rear door
219. the media See Supported media weights and sizes in the appropriate service manual The page might not be printing because the control panel setting for the media type or size does not match the media in the tray See the appropriate service manual for information about configuring the media type and size for each tray The width of the paper guides does not match the size of the media selected for the print job Adjust the paper width guides to the edge of the page Make sure that the media size selected for the print job is the same as the size of media loaded in tray 1 alternates with PJL encountered a request for a personality that did not exist in the printer The job is aborted and no pages will be printed 1 Press HELP for detailed information 2 Press UP ARROW and DOWN ARROW to step through the instructions 50 Chapter 2 Service and troubleshooting ENWW Table 2 13 Alphabetical printer messages continued Message Description Action The printer senses a media jam in the duplexer 1 Open the left lower cover remove the duplexer remove the jammed media reinstall the duplexer and close the left lower cover The fusing assembly and diverter assemblies can also cause duplex printing problems Verify that they are operating correctly Open the left lower cover and defeat the delivery cover interlock Toggle the se
220. the printer on and or does a readable message appear on the control panel display CLJ 2500 is the Ready LED illuminated e Yes Proceed troubleshooting e No Make sure that the printer is plugged in and turned on Verify that the fan s or motor s briefly run If the printer has a control panel but no messages appear on the display verify the control panel display wire harness is connected at both ends Verify firmware DIMM s are seated and operating properly Remove any HP Directjet or other EIO cards and then try to turn the printer on again Check the fuse on the power supply to make sure it is not open e Does an error message appear on the control panel display or does the control panel LEDs indicate a service error Yes Use the error message or control panel lights CLJ 2500 section of this chapter to understand the message or LED pattern Print an event log and look for reoccurring errors e No Proceed troubleshooting e Can you print a configuration page e Yes Proceed troubleshooting e No If an error message or service LED pattern appears on the control panel when you attempt to print a configuration page Use the error message or control panel lights CLJ 2500 section of this chapter to understand the message or LED pattern e Does the print quality meet the customers requirements e Yes Proceed troubleshooting e No Verify that the correct media is being used and that it has been properly stored Compare th
221. there is no firmware DIMM installed or the DIMM has failed If the formatter was just replaced make sure that all of the DIMMs have been moved from the old formatter to the new one pa Turn the printer off and on to reset the printer N Reseat the firmware DIMM making sure it is in the slot surrounded by a white line with the text ROM ONLY IN THIS SLOT ENWW Troubleshooting control panel messages 143 Table 2 14 Numerical error messages continued Message Description Action CLJ 4500 4550 A problem exists with the internal memory X Description 0 internal memory 1 Turn the printer off and on to reset the printer Reseat the DIMM If the error persists 1 DIMM slot 1 replace the bad DIMM 2 DIMM slot 2 4 If the error persists 3 DIMM slot 3 replace the formatter board A problem exists with the 1 Turn the printer off and internal memory on to reset the printer CLJ 8500 8550 nea 2 Perform DRAM DIMM oi ak ae test from the formatter Mene Memory diagnostics in the Service 1 DIMM slot 1 Menu 2 DIMM slot 2 3 DIMM slot 3 3 If the problem persists 4 DIMM slot 4 replace the bad DIMM 5 DIMM slot 5 6 DIMM slot 6 7 DIMM slot 7 8 DIMM slot 8 i The firmware ran out of 1 Check printer settings to CLJ 4500 4550 memory trying to build the determine which values static entity directory have been changed 2 Clear the message by pressing Go
222. this door provides access to the fusing assembly When the fusing door is closed a tab on the rear door pushes a door switch actuator that runs along the left side of the printer and closes SW5 1 Close the upper rear drawer 2 If the message persists remove the printer s left side cover and inspect the mechanical linkage of SW5 and the lever 3 Refer to the wiring diagram and verify that all connections J103 of the DC controller PCB and to SW5 are firmly seated 4 Verify that both the drum drawer and the ITB drawer are firmly closed Closing these drawers also closes SW4 Note The ITB drawer is referred to as the middle front drawer for end users Closing the rear door the drum drawer and the ITB drawer closes SW4 and SW5 When either of these switches is open the 24 V supply is disabled This safety feature protects the operator from any high voltages 62 Chapter 2 Service and troubleshooting ENWW Table 2 13 Alphabetical printer messages continued Message Description Action The drawer that holds the imaging drum the drum drawer is open Switch SW3 indicates that the drawer is open When the drawer is closed a plastic protrusion on the lower left corner of the drawer pivots an arm that allows SW3 to toggle to the open position 1 Open the drawer and then firmly push it closed using one hand in the middle of the drawer If the message persists r
223. to J303 and J302 on the scanner motor driver PCB Scanner Replace the scanner motor driver End motor driver PCB Is the problem corrected PCB Scanner Replace the scanner motor PM1 Is End motor PM1 the problem corrected Replace the reader controller PCB ENWW Troubleshooting control panel messages 167 E203 CLJ 8550mfp The scanner motor driver PCB or the scanner motor is faulty This error occurs when the scanner home position is detected during back scanning not requiring return to the scanner home position sensor It can also occur if a deviation occurs during back scanning returning to the scanner home position sensor Table 2 32 Cause and solutions for E203 error motor driver PCB Scanner motor Reader controller PCB connectors J303 B1 RST on the scanner motor driver PCB and J303 B4 GND and between connectors J303 B2 MOVE and J303 B4 GND change from 5 to OV Cause Issue Solution Does the scanner move until E203 See the CLJ 8550 mfp service is indicated manual Scanner Does the voltage between Replace the scanner motor driver PCB If the problem cannot be corrected replace the scanner motor Replace the reader controller PCB 168 Chapter 2 Service and troubleshooting ENWW E211 E215 CLJ 8550mfp E211 The scanning lamp fluorescent lamp thermistor has an open circuit This error occurs when the temperature does not reach 10 C after
224. to feel whether exhaust air is moving 2 Remove the printer s left side cover Check to see if anything is preventing the fan from rotating freely 3 Verify that the fan s connector is firmly seated into connector J208 of the developing PCB 4 Ifthe error persists replace the fan ENWW Troubleshooting control panel messages 125 Table 2 14 Numerical error messages continued Message Description Action CLJ 8500 8550 Fan 1 FM1 has failed or is obstructed CAUTION Turn the printer off and do not operate the printer in this condition to prevent serious damage 1 Turn the printer off and on to reset it 2 Reconnect connectors J702 and J706 on the carousel motor PCA and connector J220 on the controller board 3 Reconnect connector J701 on the carousel motor PCA connectors J648 and J641 on the main relay PCA and connector J102 on the DC power supply 4 Measure the voltage across J702 3 FAN1ON and J701 2 GND on the carousel motor PCA after the printer is turned on If the voltage changes from 0 V to 24 V replace fan 1 5 Measure the voltage across connector J701 1 24 VB and J701 2 GND on the carousel motor PCA after the printer is turned on If the voltage is about 24 V replace the carousel motor 126 Chapter 2 Service and troubleshooting ENWW Table 2 14 Numerical error messages continued Message Description Action
225. tors driver PCB duplexing driver PCB connected securely securely Horizontal Replace the horizontal registration Replace the sensor registration guide home position sensor P525 Is guide the problem corrected home position sensor PS25 164 Chapter 2 Service and troubleshooting ENWW Table 2 26 Cause and solutions for E055 error continued Horizontal Replace the horizontal registration Replace the horizontal motor M7 motor Is the problem corrected registration motor M7 Duplexing Replace the duplexing driver driver PCB PCB E066 CLJ 8550mfp During image stabilization control the dc controller PCB cannot detect the temperature sensor signal TMPSNS or the humidity sensor signal HUMSNS Table 2 27 Cause and solutions for E066 error Cause Issue Solution Connector Are connectors J801 on the Connect the connectors temperature temperature and humidity sensor and securely and humidity connector J206 on the dc controller sensor PCB connected securely temperature Replace the temperature and humidity End and humidity sensor Is the problem corrected Replace the dc controller PCB sensor E100 CLJ 8550mfp The laser of the scanner unit is faulty This error occurs when the dc controller PCB detects DBERR for 2 5 seconds or longer after the scanner motor has rotated at a specific speed Table 2 28 Cause and solutions for E100 error
226. tory on the computer 3 Open up a Command Prompt MS DOS prompt window by doing one of the following Click Start point to Programs and then click Command Prompt Click Start point to Programs point to Accessories and then click Command Prompt 4 Change the drive and the directory to indicate where the firmware file is located Do one of the following For a parallel connected printer Type copy b filename port name where filename is the firmware file name and port name is the name of the port such as LPT7 For a shared printer Type copy b filename port name computername sharename where filename is the firmware file name and port name is the name of the port such as LPT1 The control panel displays Using FTP 1 2 Connect the printer to the network Verify that the product is configured with an IP address you might need to configure the I O device TCP IP DHCP Print a Configuration page The ElO HP Jetdirect page contains the IP Address and the Host Name 10 Chapter 1 Control panel ENWW 4 Open up a Command Prompt MS DOS prompt window by doing one of the following Click Start point to Programs and then click Command Prompt Click Start point to Programs point to Accessories and then click Command Prompt 5 Inthe command prompt window change to the drive by typing C 6 Type the directory in which the rfu file resides cd c folder name in which the rfu resides
227. ture Recommended 17 to 25 C 63 to 77 F 0 to 35 C 32 to 95 F Allowed 10 to 30 C 50 to 86 F 20 to 40 C 4 to 104 F Humidity Recommended 30 to 70 RH 35 to 85 RH Allowed 20 to 80 RH 95 or less Altitude Allowed 0 to 2600 m O to 8530 ft O to 2600 m O to 8530 ft CLJ 8500 Temperature CLJ 8550 Recommended 20 to 26 C 68 to 79 F 0 to 35 C 32 to 95 F Allowed 15 to 30 C 59 to 86 F 20 to 60 C 4 to 140 F Humidity Recommended 20 to 50 relative humidity 35 to 85 RH Allowed RH 10 to 95 RH 10 to 80 RH Altitude Allowed 0 to 3 048 m O to 10 000 ft O to 3 048 m 0 to 10 000 ft Table 2 3 Electrical specifications Product Item 110 volt models 220 volt models CLJ 2500 Power 115 to 127 V 4 10 220 to 240 V 10 requirement 60 Hz 2Hz 50 Hz 2 Hz Power Printing color 400 W Printing color 403 W consumption Printing mono 224 W Printing mono 217 W Standby 30 W Standby 31 W Off 0 W Off 0 W Minimum 12 Amps 6 Amps recommended circuit capacity for a typical product ENWW Basic troubleshooting 23 Table 2 3 Electrical specifications requirement 50 60 Hz 2Hz Product Item 110 volt models 220 volt models CLJ 4500 Power 100 to 127 V 10 220 to 240 V 10 CLJ 4550 requirement 50 60 Hz 2Hz 50 60 Hz 2 Hz Power Printing 470 W Printing 480 W consumption Standby 80 W Standby 90 W
228. turn the printer off and then on The printer has detected that an incompatible fuser possibly the wrong voltage of fuser for the printer has been installed Remove the fuser and install the fuser specified for use with this printer Printing cannot continue until the correct fuser is installed in the printer 2 Reconnect connector J222 on the controller board and connector J26 on the fuser 3 Replace the controller board At least one supply item is incorrectly positioned in the printer and another supply item is missing incorrectly placed out or low 1 Press SELECT and then press HELP for help Follow the instructions on the display to locate and replace the incorrect supply 3 Press UP ARROW and DOWN ARROW to step through the instructions ENWW Troubleshooting control panel messages 73 Table 2 13 Alphabetical printer messages continued Message Description Action CLJ 8500 8550 CAUTION Press the blue button to rotate the carousel to prevent damage to the printer The print cartridge is not installed not correctly installed in the printer or not being detected by the cartridge sensor lt Color gt Cyan magenta yellow or black 1 Insert the cartridge or make sure that the installed cartridge is correctly seated in the printer Note The color toner carousel will not rotate unless the following conditions are met
229. u to clear the printer s internal event log Allows you to reset the page count after replacing the formatter The page count should reflect the number of pages printed on the print engine rather than the formatter Allows you to reset the page count of the current transfer unit if the value is lost This item automatically resets to zero when the transfer unit is replaced and the user selects the choice to reset the transfer count Allows you to reset the page count of the current fuser if the value is lost This item automatically resets to zero when the fuser is replaced and the user selects the choice to reset the fuser count Allows you to update the serial number if you replace the formatter If you replace the formatter this item allows you to set the date to the date the printer was first used rather than the date the new formatter was installed If the customer uses default paper size of A4 used in Europe this item allows you to reset the default if you replace the formatter 188 Chapter 2 Service and troubleshooting ENWW Table 2 52 Service menu items continued Product Service menu items CLJ 8500 amp menu is provided to replace CLJ 8550 values that might be lost when a formatter board or control board is replaced in the field e Serial number e Formatter number e Total page count Color page count e Duplex count e Transfer life left e Fuser life left e Engine s
230. umerical error messages continued Message Description Action 2 CLJ 4600 CLJ 5500 A fuser error has occurred X Description low fuser temperature fuser warmup service high fuser temperature faulty fuser inconsistent fuser open fuser oOouahWN 1 Turn the printer off and allow it to cool down Reinstall the fuser and check the connector J4034 that connects the fuser and the printer Replace the connector if it is damaged 3 Turn the printer off and remove the fuser Measure the resistance between the connector pins on the fuser If resistance does not meet the following guidelines replace the fuser J4034 5 to J4034 6 300 to 500 KOhms J4034 1 to J4034 2 less than 1 KOhm 4 Check for continuity between connector pins J4034 4 and J4034 2 If no continuity exists replace the fuser 5 If the error persists replace the fuser power supply PCB 6 If the error persists replace the DC controller PCB Calibrate the printer after replacing the DC controller ENWW Troubleshooting control panel messages 103 Table 2 14 Numerical error messages continued Message Description Action CLJ 8500 8550 A low temperature error has occurred in the fuser 1 Verify that the fuser is completely seated inside the printer Turn the printer off and on to reset the printer If the error persists turn the printer off an
231. unit and input trays and duplex unit the duplex tray 7 13 11 Jam in duplex unit Inspect the 14 13 2 Paper did not clear the input sensor in time 222 Chapter 3 Jams ENWW CLJ 4600 5500 jam locations Jams occur in the areas shown in Figure 3 3 Jam messages correlate with these areas For instructions to clear jams see the following pages Figure 3 3 Jam locations CLJ 4600 5500 Table 3 3 Jam locations and error messages CLJ 4500 1 Top cover area 4 Paper input path 2 Duplex Path 5 Trays 3 Paper path ENWW Jams 223 Table 3 4 Jam locations and error messages CLJ 4600 5500 Message Solution Media is delayed in the feed area of the specified tray 1 Open the covers and the ETB 2 Pull media by both corners to remove it Media is stuck in the feed area of the specified tray 1 Open the covers and the ETB 2 Pull media by both corners to remove it Media is delayed in the paper input path or has not reached the fuser paper sensor in the expected time 1 Open the covers and the ETB 2 Pull media by both corners to remove it Media has crumpled into an accordion fold as it enters the fuser 1 Open the top cover WARNING The fuser
232. uring a test The test has been aborted Close the door and restart the test CLJ 4500 4550 An error has been detected with a component of the printer drum kit Replace the drum kit CLJ 8500 8550 The printer has detected an error in the imaging drum memory device Printing can continue but will be stopped as soon as the waste toner signal is triggered Printing behavior is determined by the TONER LOW control panel setting See the service manual for information about the TONER LOW setting 1 Turn the printer off and on to reset the printer 2 Reconnect connector J209 and reconnect relay connectors J47 and J48 on the controller board 3 Replace the drum kit CLJ 4500 Or CLJ 4550 Approximately 80 percent of the drum s life has been consumed Continue printing and order the drum kit Drum replacement will be required in the near future CLJ 8500 8550 The imaging drum is almost past its specified life Printing can continue however print quality might be degraded Although printing can continue the drum kit should be replaced for optimum printer operation CLJ 4500 4550 The imaging drum has reached the end of its expected life Replace the drum kit ENWW Troubleshooting control panel messages 69 Table 2 13 Alphabetical printer messages continued Message Description Action CLJ 8500 8550
233. utton CLJ 4500 4550 locating 3 CLJ 8500 8550 locating 5 menu map 30 menus locked 49 Index 295 messages error accessory CLJ 2500 42 alphabetical list 49 Attention with Ability to Continue CLJ 2500 39 CLJ 2500 34 CLJ 8550mfp 154 numerical list 91 service CLJ 2500 46 mfp error messages 154 models supported iv motors CLJ 2500 illustrations 258 CLJ 4500 4550 illustrations 265 CLJ 5500 illustrations 275 CLJ 8500 8550 illustrations 281 errors 48 137 multi bin mailboxes bin full error message 72 communication errors 83 communication troubleshooting 145 errors troubleshooting 149 jams 56 N networks EIO errors 43 troubleshooting printing 18 non HP supplies 17 32 83 non volatile memory diagnostics CLJ 4500 4550 202 errors 42 150 initialization 190 numerical list error messages 91 NVRAM diagnostics CLJ 4500 4550 202 errors 42 150 initialization 190 O OHT sensor 122 operating environment specifications 22 troubleshooting 17 ordering parts 290 service manuals iii output bins errors 125 full 72 89 jams 58 top sensor errors 86 296 Index P pages per month iv paper error messages 39 89 size mismatch 87 unexpected size 95 unexpected type 95 paper jams See jams paper path CLJ 2500 jams clearing 218 CLJ 4500 4550 jams clearing 221 CLJ 4600 jams clearing 223 CLJ 8500 8550 jams clearing 226 jams persistent 229 test 215 transfer wrap jams CLJ 8500 8550 238 troubleshooting 214
234. ve different reference values of black and white The monitor screen has charcoal gray for the black level and the white on the monitor screen is actually blue Black on the print media is limited only by the fill capability of the product and most good quality paper has a very high white level In addition phosphor used in color monitors and toner have entirely different spectra characteristics and different color rendering capabilities Differences between output are common Blues generally match better than reds e The color of the ambient light changes the perception of color Fluorescent light lacks many colors present in incandescent light and the color range of natural light is broader than any artificial light When comparing color choose a standard light source for reference and understand that the perceived color will change as the light changes e Long term color variations occur as paper ages Use high quality paper and protect the paper from sunlight to help minimize discoloration e Environmental changes can cause color variation The development process places a high potential across an air gap to attract toner to the imaging drum Changes in relative humidity vary the point at which the toner travels to the imaging drum e All consumable components have a finite life soan and as these components reach the end of their useful life their ability to produce consistent print quality diminishes e Paper roughness can cause co
235. vice and troubleshooting ENWW Table 2 13 Alphabetical printer messages continued Message Description Action The printer senses a media jam Because this is a generic media jam message the media might be at any point in the paper path 1 Open and shut the front door of the printer to clear any media from the printer Be sure to check the fuser area because media can get wrapped around the fuser and be difficult to find 2 Check all areas of the printer for jammed media because the printer is unable to determine the location of the media jam 3 Perform the sensor monitor test in the Service Mode Menu to verify that all paper path sensors are functioning correctly or to locate the paper jam The printer senses a media jam in the transfer drum area when media has not reached PS5 In some cases the media might wrap around the transfer drum and become lodged near the imaging drum Open the right upper door remove the transfer drum remove the jammed media reinstall the transfer drum and close the right upper door The printer senses a media jam in tray 4 Open tray 4 and the vertical transfer unit VTU remove the jammed media and close the tray and the VTU Note Most transfer jams for the CLJ 8500 8550 are related to media or environment Contact HP Support for assistance ENWW Troubleshooting control panel messages 59 Table 2 13 Alphabetical
236. vice and troubleshooting ENWW E019 CLJ 8550mfp At the time of power on or while the drum motor is rotating during printer operation the light receiving cell of the waste toner sensor does not detect light for a specific time even when the waste toner case is not full Table 2 21 Cause and solutions for E019 error Cause Issues Solution Waste toner Is the waste toner detection window of Wipe the waste toner detection detection the photosensitive drum soiled window with a dry cloth window Connectors Are connector J21 on the dc controller Connect the connectors PCB connectors J631 and J633 of the waste toner sensor and the relay connector J71 connected securely securely Waste toner Is the light emitting receiving section of Dry wipe the light emitting detecting the waste toner detection block of the 8 receiving section of the waste block light printer unit soiled toner detection block with a dry emitting cloth receiving section printer unit Waste toner Replace the waste toner detection block End detection of the printer unit Is the problem Replace the photosensitive block corrected drum unit If the problem cannot printer unit be corrected replace the dc controller PCB E020 CLJ 8550mfp During image stabilization correction control the LED intensity signal LEDCNT is weak or is not generated at all Table 2 22 Cause and solutions for E020 error
237. w button 4 downloading firmware manually 10 using FTP 10 using Internet Explorer 9 websites 8 DRAM controller errors 145 drum test 205 242 drum imaging error messages 69 life out 70 repetitive defects troubleshooting 249 status light 2 status page printing 32 troubleshooting 78 drum transfer 81 duplexer errors 70 jams 51 55 troubleshooting 49 duty cycles iv E EIO errors 43 71 93 153 electrical specifications 23 Embedded Web Server 289 engine test performing 199 troubleshooting 21 environment printer specifications 22 troubleshooting 17 Index 293 error messages accessory CLJ 2500 42 alphabetical list 49 Attention with Ability to Continue CLJ2500 39 CLJ 2500 34 CLJ 8550mfp 154 numerical list 91 service CLJ 2500 46 event log 31 F face down output bin jams 58 face up output bin full 72 factory default settings restoring 194 fans CLJ 2500 illustrations 258 CLJ 4500 4550 illustrations 265 CLJ 5500 illustrations 275 errors 48 125 feed roller replacing 15 firmware errors 143 firmware upgrades NVRAM initialization 190 using FTP 10 using HP Web Jetadmin 9 using Internet Explorer 9 using manual download 10 Versions supported 8 flash DIMMs error messages 72 formatter DC controller errors 124 diagnostics CLJ 4500 4550 202 errors 97 NVRAM initialization 190 troubleshooting 21 fraud hotline 32 83 FTP firmware upgrades 9 10 fuser errors 47 102 incompatible 73 jams 52 not installed 77 replac
238. will see E 1 on the control panel display The test takes approximately 15 seconds to run The following components function during the paper path test the fusing motor M1 paper path motor M2 and associated gears and assemblies The paper pick roller for tray 2 can be activated by manually activating the paper pick solenoid SL2 This test will not pick paper and move it through the paper path To test this function simply run a Configuration page For multiple pages select Continuous Configuration page on the control panel display The paper path test allows the service technician to verify the operation of components within the paper path When the test is initiated both the M1 and M2 are activated You will see the ITB lift cams rotate once and the ITB drive gear turn briefly The remaining portion of the test simply allows both the M1and M2 to run and to move the gears and rollers that are associated with them Note If an error occurs during the paper path test the message F appears CLJ 4600 5500 paper path test This diagnostic test generates one or more test pages that you can use to isolate the cause of jams To isolate a problem you can specify which input tray to use specify whether to use the duplex path and specify the number of copies to print Multiple copies can be printed to help isolate intermittent problems The following options become available after you enter the diagnostic mode e Prin
239. wing settings are changed or lost If you do not wish to accept the new values use Service Mode to enter the previous settings that you wrote down prior to initializing e Total page count and total color page count e Transfer kit percentage of life remaining e Fuser kit percentage of life remaining e Printer serial number To perform NVRAM initialization Table 2 53 Performing NVRAM initialization Product Instructions Turn the printer off Press and hold the GO button Turn the printer on and continue to hold the GO button After the Go Ready and Attention LEDs turn on continue holding for at least 20 seconds During this process the Attention Ready and Go LEDs will each turn off Release the GO button The device LEDs will begin cycling from front to back The NVRAM init process runs until the printer is in the Ready state 190 Chapter 2 Service and troubleshooting ENWW Table 2 53 Performing NVRAM initialization Product Instructions Turn on the printer while holding down both the CANCEL JOB and SELECT keys until all the LED lights are on then release the keys Press CANCEL JOB Press SELECT Turn the printer on and watch the control panel display When the display begins showing the memory count press and hold DOWN ARROW until all three lights on the control panel are lit Press DOWN ARROW 4 Press PAUSE RESUME The display should show 2 1F Press DOWN ARROW until i is highlighted 6 P
240. with simultaneously to see a secondary light either the EIO port ora pattern See Accessory error secondary NG DIMM slot messages CLJ 2500 on page 42 suk The printer stops Anak printing and pressing D any button has no effect Service error 1 Ifthe printer is connected to a power The printer stops strip or surge protector disconnect it printing and pressing and connect the power cable directly to NO any button has no a working wall outlet Oe effect 2 Turn the printer off and then on If the problem persists leave the printer off for 15 minutes to reset the printer 3 If the problem continues press and hold GO and CANCEL JOB simultaneously to see a secondary light pattern See Service error secondary messages CLJ 2500 on page 46 38 Chapter 2 Service and troubleshooting ENWW Attention with Ability to Continue secondary messages CLJ 2500 Oo If the printer has an Attention with Ability to Continue error the Attention light is blinking and the Go light is on press and hold Go and CANCEL JOB simultaneously to see the secondary error message You can also view the embedded Web server which provides a text message that corresponds to the error and its secondary light pattern Table 2 11 Attention secondary messages CLJ 2500 Message Description Solution 20 Insufficient Memory error The printer memory is full Press GO to resume printing If you lose some data try to free
241. xplorer window to the window in Internet Explorer The printer should now indicate that it is performing the upgrade Using HP Web Jetadmin 1 2 Print a Configuration page to determine the printer s IP address Go to the main page for HP Web Jetadmin Go to http Awww hp com go webjetadmin to download HP Web Jetadmin for Windows or Linux For a single printer select the IP hostname or IP address of the printer in the Quick Device Find field in the top right corner and then click Go For multiple printer updates see the HP Web Jetadmin User documentation 4 Click the right arrow below Go and move to the Update menu option 5 Select Update and Update Printer not Update Jetdirect and continue 6 Click Browse to locate the firmware image file downloaded from the Internet ENWW Upgrading the firmware 9 Click Upload to move the firmware image file from the C drive to the HP Web Jetadmin server Click Refresh in the upper right corner It looks like a page that contains two arrows in a circle Select the date code to send to the printer firmware file name The date code format is YYYYMMDD YYYY is 200x the year and MM and DD are the month and the date 10 Click Update Firmware HP Web Jetadmin sends the selected image to the printer Using a manual download for parallel connections 1 Print a Configuration page to determine the firmware version 2 Download the firmware from the HP website and copy it to a direc

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