Winter `13 - LPT Home Page - HP LaserJet and Lexmark Parts
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1. PPCU LPT LPT remanufactured fusers and printer assemblies are rebuilt individually tested and inspected in the USA Call Toll Free 888 444 8778 SERVICE EDGE WINTER 2013 SPECIALS VALID THRU FEB 15 2014 WHILE QUANTITIES LAST RM1 3131 R REMANUFACTURED FUSER FOR COLOR LJ 4700 4730 AND CP4005 OUTRIGHT 149 RM1 4554 RA REMANUFACTURED FUSER FOR LJ P4014 P4015 AND P4515 EXCHANGE 139 RM1 1082 R REMANUFACTURED FUSER FOR LJ 4250 AND 4350 EXCHANGE 89 7934A N NEW JETDIRECT 620N OUTRIGHT 99 7934A R REMANUFACTURED JETDIRECT 620N OUTRIGHT 69 LIBERTY PARTS TEAM LIBERTY PARTS TEAM INC 3517 W BELTLINE HWY MADISON WI 53713 888 444 8778 WWW LBRTY COM Prsrt Std U S Postage PAID Permit 168 Madison WI2. sage on the printer s display In this series if the door open condition is present when the printer is powered up it will just keep cycling through the startup stages memory test initialization without ever reach ing the ready state If your printer be haves like this 1 Check to make sure both doors are fully closed 2 Check if the actuator tabs for the door open switch are intact The door open switch is actuated by tabs in the front door and the top fuser door Figs A B C The one on the front door is detachable Replace the appropriate door or cover if a tab is missing or broken 3 Ifall of that looks good the interlock switch may be bad 4 Swap the formatter if all else fails RMI 267 Upper Cover Fuser Door Simplex models RM1 2673 Upper Cover Fuser Door Duplex models RMI 2714 Front Cover Simplex models RMI 2715 Front Cover Duplex Models RM1 2670 Interlock switch PRINTER TECH ARTICLE Hanging Initialization 3000 3600 3800 CP3505 Part One What is Calibration If your Color Laserjet 3000 series laser printer gets stuck at the Initializ ing stage during start up it is prob ably a calibration problem This article will explain how to bypass calibration a useful expedient the two ways of resetting it and how to swap parts as a last resort But first let us understand what calibration is Calibration is the printer s way of checking that 1 the darkness dens
3. ASS THE CALIBRATION STAGE IF THE NEEDED 6 www lbrty com Hanging On Initialization 3000 3600 3800 CP3505 Part Two Bypassing Calibration Itis a common problem on this series of printers for the calibration to take a long time or hang indefinitely Eventually this will need to be fixed but you can get around the immediate problem by performing the following procedure on power up 1 Turn the printer off if necessary and then on NO As soon as the printer begins its ini tialization sequence press and hold down arrow until all LEDs are lit OO Press up arrow one time and then press Menu A Press down arrow until SKIP CALIBRATION appears and then press the green check mark key to select it This will get you going for the short term as long as print quality is accept able Of course whatever is Causing the calibration problem may also cause print quality problems Even if the immediate quality is acceptable it will eventually degrade if the printer never calibrates So at some point you will need to address the underlying prob lem Part Three Cold Reset The cold reset is one of two different resets that can fix with Color LaserJet 3000 series calibration problems 1 Since the cold reset will clear the network address it isa good idea to print a configuration page first so the network address can be reentered afterward Even better is to prevent the
4. SERVICE EDGE The Laser Printer Tech Quarterly from Liberty Parts Team Winter 2013 OUR LATEST PRINTER DISCOVERIES CLJ 3000 series Looping and Hanging initialization Lj 4200 Mostly Blank pages LJ 9000 66 11 01 error PLUS Color Laser Theory LIBERTY PARTS TEAM SERVICE EDGE WINTER 2013 About this issue of Service Edge We have much to say in this is sue about color laser printers But that s not all e Ifyou have Color Laserjet 3000 3600 3800 CP3505 printers that cant finish initializing we have articles that will be of interest We show how to trouble shoot calibration related issues such as Looping Initialization and Hanging Initialization and share a useful calibration work around e We update our laser theory article to include color e We share our discovery that an out of place ground wire can cause severe imaging problems in the 4200 4300 family Finally we show what to do when a 9000 series printer gives indications to install a paper path connection unit that is already present Hope you find this an informative and enjoyable issue Aboutthe cover You may have recognized the design on the cover as the close up of overlaid cyan ma genta and yellow circles These three colors plus black are the basis for color laser printing In theory equal amounts of the three colors should produce black in practice they make a muddy color when printing so black
5. address from being cleared by removing the JetDirect card or disabling the the embedded network a To disable the embedded network select DISABLE EMBEDDED LAN in the same hidden menu where you find the cold reset see below Performing any action in this menu takes you out of the menu and then you have to cycle the power to get back in So you will have to do this three times once to disable the embedded network a second time to perform the cold reset and a third time to re enable the network But this may still be simpler than resetting the network address 2 Power on the printer and watch the display 3 When the initialization sequence begins press and hold the green check mark key 4 When all lights are on solid release this key You should see SELECT LANGUAGE on the display 5 Use either arrow key to scroll to COLD RESET and then select it with the green check mark key If your printer still cannot get to the Ready state try the DC Controller reset Part Four DC Controller Reset 1 With the printer powered off open the front door and leave it open 2 Press and hold the engine test button accessible through a small hole in the rear panel of the printer lower right corner while powering up 3 After about 10 seconds release the button close the front door and letthe printer initialize as usual 4 Ifthe resets don t help try a remote firmware upgrade bypassing calibration will be
6. d a complete page size image ora full sheet of paper There are two methods e Multi stage transfer process toner is first transferred from the image drums to the transfer belt drum primary transfer This process is repeated four times until we have a composite image all four colors on the drum belt and then that image is transferred to the paper secondary transfer Single pass laser printers may use the multi stage transfer process and carousel printers must use it e Direct transfer used by many newer printers has the transfer belt carry a sheet of paper past the toner cartridges with the toner transferred directly from the image drums to the paper 7 FUSING Lower roller pressure and upper roller heat bond the toner to the paper wy un SERVICE EDGE WINTER 2013 B ACTUATOR TAB FUSER DOOR 4 x C ACTUATOR TAB FRONT DOOR www lbrty com NEW DISCOVERY Looping Initialization 3000 3600 3800 CP3505 If your Color Laserjet 3000 series laser printer gets stuck in an initializa tion loop at start up repeating various stages indefinitely without ever reach ing the Ready state the cause Is most likely related to a simple door open condition Most printers use switches and sen sors to detect when doors are open If a door is left open or if one of these switches fails you will get an error con dition either a blinking light on lower level printers or a Door Open mes
7. drum is cleaned of toner by a rubber blade and receives an even negative DC charge from the charge roller as well as a dose of AC bias to remove residual images 4 WRITING The laser beam discharges tiny areas of the photosensitive drum to form an invisible image LE TE 0 The images on the drum and on the printed page consist of horizontal rows of closely spaced dots On a 1 200 dpi printer the dots would be 1 1 200 of an inch Color Toner Cartridge and Laser Scanner Orientation Two Kinds e Early Carousels A single laser scanner writes to four toner cartridges mounted in a carousel After each cartridge drum is written upon the image is transferred to the belt see step 6 and the next cartridge is rotated into the ac tive position and so on e Single Pass Each cartridge is fixed and has its own laser This allows all four color planes to be laid down in a single pass 5 DEVELOPING Negatively charged toner adheres to discharged areas of the drum The toner gets the negative charge from the developer roller Since like charged objects repel each other the toner does not adhere to the negatively charged parts of the drum but only to discharged areas 6 TRANSFERRING The transfer roller adds a positive charge to the back of the paper which attracts the toner from drum to page Color Transfer Process Two Kinds Instead of a transfer roller color laser printers have a transfer belt or drum that is large enough to hol
8. er and may even work butthey can cause long calibration times as well as various other problems These printers can also be sensitive to non HP cartridges For best results use the correct HP cartridges for each printer model 2 TRANSFER BELT 3 HIGH VOLIAGE POWER SUPPLY 4 LASER SCANNER in particular dirty optics inside the scanner unit If the scanner optics are dirty you will need to remove the scanner unit trom the printer see the service manual for details and open it up to do a good job of cleaning the optics 5 DC CONTROLLER 6 FORMAITER LPT NEW DISCOVERY Misplaced Ground Issue in 42xx 43xx In a laser printer the printed image is generated by a laser beam but a good image also depends on the toner car tridge being electrically charged in a certain way This charge comes from the high voltage power supply If the charge is off in one direction you can get light print or even a totally blank page if it is off in the other direction you can get a dark background or even a totally black page This charge on the cartridge Is referenced to a ground con nection If the ground connection is missing or bad the charge floats and this can have the same sort of effects on the image that we described above This problem can occur in any laser printer but it is especially common in the 42xx 43xx series 4200 4240 4250 4300 4345 MFP M4345 MEP and 4350 On these models the toner ground connec
9. ity for each color is correct 2 the 4 color planes line up properly with each other To do this it puts a toner pattern on the transfer belt and looks at it with sen sors If the pattern looks good we re done If not the printer makes some adjustments and tries again It repeats this process until satisfied If it is never satisfied you either get a calibration er ror or it gets stuck in calibration Note that the sensors which are used in this process are sometimes called density sensors referring to function 1 above and sometimes called CPR color plane registration sensors referring to func tion 2 above These are the same sen sors just two different names for them Generally color printers perform calibration at power up and whenever the toner door is opened and closed Some printers will also do it periodi cally e g every half hour or every hour this interval can sometimes be set in the menus Usually you can also go into the menu and force a calibration which is more powerful and or more thorough than the one that the printer does automatically Calibration occurs automatically during the power on pro cess and should only take a moment SERVICE EDGE WINTER 2013 ay 1 INN SAAS NN To order printer parts call LPT at 888 444 8778 5 SERVICE EDGE WINTER 2013 A PRINTER THAT CAN T CALIBRATE ITSELF IS A PRINTER THAT NEEDS FIX ING HOWEVER IT IS POSSIBLE TO BYP
10. m tray 4 into the main body of the printer and is only used when feeding trom tray 4 If there Is no tray 4 the printer may or may not have a pa per path connection unit and will work fine without it However if there is a tray A feeder installed the printer can sense whether or not the paper path connec tion unit is there and will display the 66 11 01 error if it cannot detect it The sensor that detects the pres ence or absence of the PPCU is located in the vertical registration assembly which is part of the tray 4 feeder rather than the printer and is located directly below the PPCU The upper gear in the VRA is mounted ona spring loaded piv otarm and when the PPCU is installed a white plastic bracket on the right side of it presses down on this arm Fig B This actuates an optical sensor inside of the VRA Fig C demonstrates how the pivot arm moves when pressed In short If you get this error there are three possible causes 1 2 the PPCU is not installed the PPCU is not pushing down on the gear in the VRA either due to incorrect installation or due to broken parts there are internal problems in the VRA broken actuator arm or bad sensor There are no parts available for either the PPCU or the VRA so unless it s a case of improper installation one of these as semblies will need to be replaced RG5 6225 Vertical Registration Asm VTU VRA RG5 6227 Paper Path Connection Unit
11. necessary as described in part two If that doesn t work swap parts as described in part five on the next page SERVICE EDGE WINTER 2013 Ready Data Attention s COLD RESETS ERASE THE NETWORK ADDRESS AVOID THIS INCONVENIENCE BY FIRST REMOVING THE JETDI RECT CARD OR DISABLING THE EMBEDDED LAN ENGINE TEST BUTTON AT REAR OF PRINTER To order printer parts call LPT at 888 444 8778 7 SERVICE EDGE WINTER 2013 TONER 3800 CARTRIDGES CP3505 Parts to Swap a DC Controller b Formatter c Laser Scanner d HVPS e Transfer Belt www lbrty com Hanging Initialization 3000 3600 3800 CP3505 Part Five Parts Swapping Anything that affects image quality will also make it hard for the printer to calibrate itself So all of the imaging el ements are suspects In addition there are elements that are only used during calibration the color registration den sity sensors located inside the transfer belt unit on these printers and the firm ware routines in the formatter and DC controller that control the calibration process The following is our recommended course of action 1 TONER CARTRIDGES Note that color printers can be very sensitive to differences in toner cartridges Even though the four printer models listed in the article title all share the same basic engine they do not all use the same toner cartridges see table Incorrect cartridges will still fit in the print
12. pigment is mixed with them to get black That s why we have black toner in color printers SERVICE EDGE is the quarterly laser printer tech bulletin of Liberty Parts Team Inc Editor in Chief David K Reinke Editor Robert Reinke l LIBERTY PARTS TEAM Writers Dennis Kosterman Robert Reinke LASER PRINTER IMAGE FORMATION O CALIBRATION COLOR In a monochrome printer precise control of image alignment and density is not critical small variations are not even noticed But in a color printer since you are combining four separate color planes into a single composite image it is vital that all four planes are the same density and that they line up precisely with each other This is why color printers need to calibrate frequently on each power up and whenever a toner cartridge or other imag ing element is replaced 1 CONVERSION The computer converts the print job into a page description lan guage and sends it to the printer formatter board Page Description Languages include Adobe PostScript PS HP Printer Command Language PCL and Mi crosoft XML Page Specification XPS 2 PROCESSING The formatter separates the print job into image location information nl 3 and print process instructions and stores the image information in memory The DC con het oes f troller synchronizes image formation with input and output and also signals the formatter to send data FORMATTER Le 3 CONDITIONING The photoconductive
13. tion is just a thick stiff wire on the left side of the cartridge cavity Fig A and it can easily get dis lodged from its proper position In the normal position there should be about a finger width between the ground wire and the white plastic guide below it Fig B When it gets dislodged it will usually be lower than the normal posi tion Fig C D Depending where it is you may even have trouble inserting the toner cartridge If this happens do not force it Check the position of the ground wire It is easy to move it back to its proper position The smeared page in Fig E is a possible re I sult Partial print and other print ee problems are also possible LPT False 66 11 01 Paper Path Connec tion Unit Not Installed Lj 9000 9040 9050 M9040 M9050 In HP Laserjet printers 65 and 66 error codes are always related to op tional devices high capacity feed ers output stackers etc In the LaserJet 9000 series one of the more common error codes is 66 11 01 According to the service manual this means that the paper path connection unit is not installed and the recommended solu tion is to install it In this article we will look at what that unit is what it does and how you can get this error even when it is installed The paper path connection unit is mounted to the right side of the print er Just above the optional 2000 sheet feeder tray 4 Fig A It helps feed paper fro
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