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1. If the paper is folding or crumpling you can usually find the problem at the leading edge of the paper This could be a worn or non turning roller an obstruction in the paper path or a result of paper skewing outside of the paper path B Paper is not crumpled 1 See where the paper stopped If the leading edge stops just after a sensor that sensor Is probably malfunctioning Go to step Il Replace any worn or slick rollers especially the pickup rollers Run paper through all the possible paths input and output a Ifthe jam occurs in all paths look at the reg istration area and the fuser b If the jam only occurs in certain paths look SERVICE EDGE is the quarterly laser printer tech bulletin of Liberty Parts Team Inc Editor in Chief David K Reinke Editor Robert Reinke Writers Dennis Kosterman Robert Reinke 2011 Liberty Parts Team Inc at the pickup and feed rollers associated with the problem path NOTE Remove jammed paper from the fuser care fully to avoid tearing the sleeve 4 Inspect the printed image a If the page or part of the page is past the toner transfer area and is blank either the timing Is so far off that the printer didn t even attempt to generate an image or the input sensor did not see the paper In either case the problem is usually in the input sec tion even though the paper may be found considerably farther along than that b If the image is shifted2. J C oii 9 Gear retaining tab and screws ej a SERVICE EDGE FALL 2011 Have you entered Liberty Parts Team in your database as a printer parts vendor PRINTER TECH ARTICLE The WAITING FOR TRAY TO LIFT error Paper jam errors during or immediately after the initial power on sequence indicate detection of paper where it shouldn t be Whether the detected jam is actual or an illusion caused by a broken jam sensor flag a 13 PAPER JAM is the usual message In the case of a broken left or right registration sensor flag in the 42xx 43xx family something else happens There are generally three sensors in the registration assembly left right and center A failed central flag causes a 13 Paper Jam message If either of the other two is broken or impeded the control panel reads Waiting for tray to lift but the tray never lifts and the Ready state is never reached Note that a failed lifter mechanism would produce a 60 x error Check the left and right registration flags If the actuator flag is properly positioned and operational you should be able to push it with your finger toward the back of the printer i e in the di PRINTER TECH ARTICLE Various Issues with the 42xx 43xx Paper Jam See the article on page three 50 error Common to all laser printers the 50 error indi cates a problem with the fusing assembly a temper ature issue open circuit or wrong fuser The fuser is the first thing t
3. the pickup roller turns it s not supposed to when the tray is empty If it turns replace the tray pickup assembly which has a malfunctioning paper out sensor B Replace any pickup rollers that have been worn slick C The pickup roller is not turning l Tray pickup roller not turning after a print job Is sent to It a Replace the tray pickup asm which has a defective mechanism b Replace the DC controller rare 2 Cassette pickup roller not turning after a print job was sent to it The pickup mechanism is not avallable as a complete assembly but only as a collection of individual parts So you will need to do some troubleshooting a Remove the top and right covers then re install the top cover Print a configuration page and observe the pickup drive assem bly This gearbox is in the lower left corner as you face the right side below the main drive asm fig 4 p 6 Replace it ifthere are gears that are grinding or not turning b The pickup solenoid makes a loud click when the paper is being picked up If there is no click or ifthe mechanism is not moving during the print job replace it c Replace the swing plate RL1 0013 and 18 tooth gear RU5 0045 This swing plate is a different part than the swing plate asm lt is a small blue and white assembly between the pickup and feed rollers D In the front ofthe cassette remove the separation roller and torque limiter and re install the roller only If
4. the printer feeds normally in this configu ration the torque limiter is defective The separa tion roller and torque limiter work together to pre vent multi feeding Sometimes the torque limiter can overdo its function and not even allow a single sheet to get through In this case the paper will feed up to the separation roller stop there and of ten fall back into the cassette leaving the impres sion that it never got picked up at all SERVICE EDGE FALL 2011 For printer tech support one number 888 444 8778 PRINTER TECH ARTICLE Swing Plate Asm Replacement 42xx 43xx A worn out fuser drive gear causing grinding noises while printing is a very common problem in this series of printers This gear is part of the swing plate assembly which contains the black fuser drive gear and another white gear Usually you only need to replace the black gear and this is a relatively sim ple procedure which is available on our website But occasionally both gears are worn and then you will need to replace the entire swing plate assembly There is no procedure for this in the service manual SO we provide one here 1 REMOVE CARTRIDGE CASSETTE Put the toner cartridge in a dark place or cover it 2 REMOVE TOP ACCESSORIES ACCESSORY COVER Remove any output accessories stacker stapler stacker etc If there are none remove the top accessory cover which is on top toward the back by simply lifting it up There are retain
5. up or down on the page replace the registration assembly which controls image position 5 Extra Sheet A common scenario for these models is for the printer to feed an extra blank sheet at the end of a print job This page will then jam in the fuser This typically happens from one Input tray only most commonly tray 2 The usual cause is a sticky pickup solenoid which needs to be replaced Il STARTUP JAMS ERROR OCCURS ON POWER UP NO PAPER FOUND This always involves one or more of the printer s paper movement sensors A An actuator arm is stuck or broken This is the most common cause There are three places to check 1 Paper Feed Area a Remove the tray pickup assembly to access the paper feed area Using the instructions in the manual this takes about 10 minutes b Locate the actuator arm shown in Fig A and try to move it with your finger If it won t move or if spring tension doesn t snap it back into place when released order LPT s SERVICE EDGE FALL 2011 Have you entered Liberty Parts Team in your database as a printer parts vendor remanufactured paper feed assembly which includes the actuator arm and spring RM1 0012 R The optical sensor is part of the transfer assembly Note that the spring must be installed with the tail tucked back into the transfer assembly to maintain ten sion 2 Registration area a Remove the toner cartridge and lift the met al flap with the green handle
6. 8 a m and 10 30 a m options which are guaranteed Air gets your techs tn the field quicker and your cus tomer serviced faster Only air gives you that capabil ity Ground Isn t Prioritized Ground shipped packages do not receive priori tized handling and thus face greater risk of damage Especially during peak times getting your parts safe ly and on time is critical Priority handling every step of the way and guaranteed next morning delivery make next day air the preferred way to deliver parts Office Manager HR Marcia Dobrowits served LPT s 70 employees a Thanksgiving meal this year SERVICE EDGE FALL 2011 For printer parts one number 888 444 8778 PRINTER TECH ARTICLE Paper Jam Troubleshooting in the L 42xx 43xx This is a method for troubleshooting the 13 paper jam in the HP Laserjet 4200 4300 and 4250 4350 4340 O WHICH KIND OF JAM A Look for jammed paper under the registration flap beneath the toner cartridge by the cassettes and in the fuser If you find any go to step B If there isn t any jammed paper disconnect the printer from the computer or network and restart it This prevents print jobs from interfering with the troubleshooting a If the error occurs at power up AND no paper is stuck inside go to step Il b If the error only occurs after sending a print job AND no paper is stuck inside go to Ill PAPER IS FOUND IN PATH A Paper is crumpled l
7. Controller for the 4250 4350 4340 IF REPLACING BOTH BOARDS follow the steps first for the formatter then repeat them for the DC controller Power off the printer remove all accessories and network cards and disconnect it from comput ers and networks 2 Install the board 3 Turn the power on wait for the memory count to begin and then press and hold the Down Ar row button A After all three control panel lights flash once and then remain on this should take about 10 sec onds release the Down Arrow button 5 Press and release the Up Arrow button 6 Press and release the Menu button The dis play should show SKIP DISKLOAD Press the Up Arrow button until NVRAM INIT is highlighted 8 Press the check mark key The printer will perform the NVRAM initialization procedure and then continue with its normal power on se quence HP claims that you will now have to go into the service menu and specify the total page count the maintenance count the service ID the eoceeerecee eee ees ee ese ee eee ee eee eee ee eee oe eee eee eee eee ee eee see ZeeeeZee ees eseeseeseeeseeeeeeeee eee ese see o o o o cold reset paper size and the serial number But in our experiments these items got copied over from the other board even when performing the NVRAM initialization procedure 9 After it reaches the Ready state wait five min utes then turn the printe
8. The manual gives the steps to follow and is available at lbrty com on the Good Stuff page SERVICE EDGE FALL 2011 For printer parts one number 888 444 8778 PRINTER TECH ARTICLE Registration Transfer Asm Compatibility and Buying Tips Registration and transfer assemblies of the HP La serjet 4200 4300 and 4250 4350 families do not interchange freely The original 4200 4300 regis tration assembly lacks a clearance notch for a sen sor flag on the right side This makes It incompatible with the 4250 4350 transfer assembly which has a sensor flag on the right lo see what happens if you combine these parts read The Waiting for Tray to Lift error page 8 Buying Tips Registration Asm For a 4200 or 4300 printer the best buy is the original registration assembly RM1 0011 R It is not compatible with the 4250 4350 e a ry i REGISTRATION ASSEMBLY On top RMI 0071 R the original 4200 4300 registration asm Below RM1 1098 showing the clearance notch that makes it compatible with 4200 and 4250 printers alike POCO OO HSE OHH SEEHHEE EES HOEE OS OESOESEESOE TEESE EESEHHSSESEHOEEEEHET EES HOSE ES OTSOEE SETHE TESS E SHOES EEESHSSTEEEEHS EES ESEEEEEEEOES Various Issues Continued 59 4 error This is usually caused by a bad toner cartridge The print car tridge motor the DC controller and a faulty connection between these two parts can also cause this co o o o o nooo o eee ee ee eee eee ee o
9. b Move the center sensor flag with your finger to see if it snaps back in place If it doesn t replace the transfer assembly There are ei thertwo orthree sensors under this flap de pending on the specific printer model Only the center one can cause a paper jam error The other sensor or sensors are for paper width sensing For more information see the article on page 8 3 Fuser a Move the sensor actuator arm on the exit side of the fuser If it doesn t snap back into place replace the fuser b Check the part number on the label to make sure the correct fuser is installed See p 10 B An optical sensor has failed very rare unless it s ohysically cracked or broken C The DC controller board is defective D There is a bad electrical connection between one or more sensors and the DC controller PARTS CAUSING PAPER IN PATH JAMS pickup roller fuser registration asm feed roller pickup solenoid Pd 5 WS a et PARTS CAUSING STARTUP JAMS feed asm transfer asm fuser shown above DC controller om O 3 p PARTS CAUSING PICKUP JAMS pickup roller shown above tray 1 pickup asm pickup drive asm pickup solenoid shown above 18 tooth gear swing plate separation roller torque limiter Il ERROR OCCURS AFTER PRINT JOB IS REQUEST ED NO PAPER FOUND This always indicates a pa per pickup failure Some common causes A With tray open and empty print a configuration page and see if
10. e Up Close Laserjet 42xx 43xx E DVYI C e waiting for tray to lift error e jam t shooting swing plate asm removal e board installation transfer reg fuser interchange e typical and unusual errors e Why air beats next day ground The Laser Printer Tech Quarterly from Liberty Parts Team Winter 2011 LIBERTY PARTS TEAM COMPANY Why Our Clients Prefer Air Over Next Day Ground From Madison Liberty Parts Team ships printer parts across the country Our clients outside the Midwest have alternatives to us that offer next day ground That is when the origin and destination are close enough to expect ground delivery in a day Nevertheless customers prefer LPT by air than the other guy by ground be they in Stamford Conn or Sacramento Calif Why First of all they prefer our parts Not one in ten but every single one of our remanufactured fusers are In spected and tested Customers appreciate this Secondly they see the cost difference between air and ground greatly mitigated by LPT s volume shipping discounts Thirdly they embrace air because it boosts their business in a way ground cannot Ground Isn t Guaranteed When you order ground shipping there is no guarantee for next morning delivery Depending on delivery routes which fluctuate you could be wait ing until late afternoon It s like hanging around wait ing for the cable guy Next day air shipping is different There are
11. e eee ees esee o co o eee ee eee ese ee sees eee seeseeeeeee see ese ee ooo For 4250 4350 or for stock RM1 1098 R is the economical choice lt is also compatible with the 4200 4300 The OEM option RM1 1098 O30CN is for both the 4200 4300 and the 4250 4350 Buying Tips Transfer Asm For a 4200 4300 the remanufactured option is RM1 0007 R It has a 12 wire cable harness a 12 wire pin connector and only three sensors The new OEM part RM1 0007 N has a fourth non working right side sensor flag so it superficially resembles the 4250 version For 4250 4350 RM1 0007 190 R is needed It has four working paper sensors Its 15 pin connector to the DC controller makes it impossible to install ina A200 or 4300 TRANSFER ASSEMBLY Shown RM 1 0007 190 R transfer assembly for the 4250 4250 with the additional sensor flag shown RM 1 0007 N will look similar but the extra flag will be non functional RM1 0007 R will be missing this flag eoeorcorrroeoorrrecrrrrrnncon once nrcrnrnenrrrrrnn crece nrcrrrnnoncrcrrrncnnnerrrn cercano ncrnrnncnronnnnnrrcrrn rc 60 error This error means a failed lifter mo tor for the standard 500 sheet cas sette 60 2 error or for an optional sheet feeder 60 3 60 4 Checkthe connection between the lifter and the board into which it plugs then try replacing the lifter then the board For the standard tray this is the DC controller For a sheet feeder it is the
12. elivery guide and look at the exit sensor flag in the center The flag in the 4250 4350 fuser Is unique If the flag on your fuser matches b go to 4 A Y b gt T The 4250 fuser exit sensor flag a is unique 4 Ifthe delivery guide has extra rollers the fuser is a RM1 1043 4345 If absent it is RM1 0101 4300 If the delivery guide is absent it is difficult to tell which printer the fuser belongs to However this is a moot point as these two fusers interchange The 4345 fuser has extra rollers SERVICE EDGE FALL 2011 For printer parts one number 888 444 8778 PRINTER TECH ARTICLE 4250 4350 Formatter DC Controller Installation The 4250 4350 and 4240 print at different speeds yet are essentially identical machines In par ticular the DC controller is the same and non base models use the same formatter These two boards house memory chips that store a printer s identity page count and menu settings Thus a 4350 prints at 55 pages per minute because its memory tags say It can This setup Is generally convenient When you have to replace elther board the printer automati cally copies all the information to the new board us ing the unreplaced board as a source Manual page count reentry is thus unnecessary On the other hand not following the correct pro cedure could result in loss of the identity tag which could change your 4350 into a slower 4250 Replacing the Formatter or DC
13. feeder control ler PCA for that feeder e 0 oo o oo eee ee ee eee ee ee ee eee ee ee eee ee sesesee co oc e oo ono po o o o o o o ooo o oo o SERVICE EDGE FALL 2011 For printer info one site lbrty com 10 PRINTER TECH ARTICLE 42xx 43xx Fuser Compatibility and 13 20 50 5 errors Many parts interchange in the HP Laserjet 4200 4200 4240 4250 4350 and 4345 but the fuser generally doesn t Whenever you see a 13 20 or 50 5 error after installing a fuser in one of these printers you should check that it s the correct fuser for that printer Here s how 1 Find the fuser s part number on the bar code label above and to the right of the connector If the label has been removed or is unreadable go to 2 A200 RM1 O013 4250 4350 4240 RM1 1082 4300 RM1 0101 interchanges with RM1 1043 4345 RM1 1043 interchanges with RM1 0101 The 4300 and the 4345 fusers are similar enough to work in each other s printers without causing any er rors or problems Any other attempted interchange will produce an error code 2 lfthere are five and not six large pins in the con nector it is a 4200 fuser If it has six go to three Note The missing sixth pin present in the other fusers is for lower pressure roller bias voltage which is not used on the 4200 Also note that upper roller is Teflon like film in a 4200 fuser metal otherwise The 4200 fuser lacks the sixth large pin 3 Lift the black d
14. ge you may want to open the metal door on the side of the cage so that you can visually verify correct seating of this connector REMOVE TOP COVER Open the print cartridge door and the front cover Use needle nose pli ers to release the print cartridge drive arm from the right side of the cover a in Fig 2 and then oush the arm down into the printer remember to re attach this arm when re installing the cover Remove four screws one in each corner of the cover b in Fig 2 Carefully rotate the left side of the cover up away from the printer until you can unplug the control panel cable from the DC con troller board on the right side then lift the cover all the way off REMOVE RIGHT SIDE COVER Release three locking tabs two along the front edge and one along the top edge rotate the top of the cover away trom the printer and lift to remove it When re installing insert the hooks at the bottom first and verify that the plastic power switch arm on the cover locks onto the metal switch connecting rod in the printer body Fig 3 REMOVE LEF T SIDE COVER Release two locking tabs one along the front edge and one along the top edge rotate the top of the cover away from the printer and lift to remove it When re install ing insert the hooks at the bottom first 11 REMOVE PCA GUIDE Fig 4 To remove the PCA guide a remove two screws 6 push in on the retaining button c and slide the guide toward the rear of t
15. he printer to remove it 12 REMOVE POWER SUPPLY a On the right side of the printer remove three screws and a grounding screw d in Fig 4 b Unhook the metal power switch rod e in Fig 4 from the chassis and then pull down to remove itfrom the power supply Observe how the rod attaches to the power supply inside the paper tray cavity before removing It so you will know where to re attach it later Fig 5 c Unplug the two flat cables and the DC controller power connector from the DC controller Fig 6 unweave them from the cable guides and feed them through the hole below the power supply into the paper tray cavity when re installing the power supply feed the DC controller power connector and cable back through the hole first and then the two flat cables d On the left side of the printer remove two screws a in Fig 7 and then remove the fan cover plate below the fan This gives you access to two cables b Unplug them and then remove three screws c corresponding to the three that were removed trom the right side e Finally grasp the power supply chassis trom behind lift slightly and pull it out the back of the printer NOTE When removing and re installing the power supply take care not to a og mre ra Laja a vf S Neal SERVICE EDGE FALL 2011 For printer tech support one number 888 444 8778 dislodge the small rubber belts and plastic rollers on the feed guide assembly mounted t
16. ing tabs on each side but they will release them selves as you pull up on the cover 3 REMOVE DUPLEXER DUPLEX ACCESSORY COVER If the printer has a duplexer lift it up slightly and pull it away from the printer in the back to remove it lf not remove the duplex ac cessory cover in the same way 4 REMOVE TRAY 2 EXTENSION DOOR Facing the rear ofthe printer rotate the cover up to the hori zontal position and then lift up the right side of the cover to unlock its pivot bar Then slide the other pivot pin on your left out of its retainer to remove the cover 5 REMOVE REAR OUTPUT BIN Open the bin and squeeze the left hinge pin out of its mounting hole a in Fig 1 Then rotate the bin away from the printer to release the other hinge pin 6 REMOVE FUSER Squeeze the blue fuser release tabs one on each side and pull the fuser straight back and out of the printer When re installing the fuser make sure to push it in until these tabs snap into place REMOVE FORMATTER First remove the plas tic formatter cover right side of the printer to ward the back by simply grasping it and sliding 3 Right cover SERVICE EDGE FALL 2011 For printer info one site lbrty com 10 it straight back To remove the metal formatter cage remove two screws b in Fig 1 then grasp the metal cage and slide it straight back This will require some force as you are also unplugging a connector When re installing the board ca
17. o check The DC controller and the power supply rarely can cause 50 errors Motor Slowdown Uncommon When the sound of the motor Is delayed at startup or when print ing the motor runs a few seconds longer than normal before feeding paper a weak or defective heating element in the fuser Is at fault Re place the fuser IAS fs SAA AAA D i rection that paper would push it and when you let it go it should come back to the forward position If it does not act this way it s not positioned correctly In almost all cases all you have to do is reposition it Another cause See registration asm figure p 9 Since the 4200 and some 4300 printers lack the sensor on the right the original registration as sembly lacks a hole for it Installing this registration assembly in other models would impede the right sensor and cause the tray waiting error Grinding Swing Plate Asm Itis common for the black gear in the swing plate assembly to wear out resulting in a grind ing sound We devised a short cut to fix this issue which is on our website Ibrty com in the Printer Tech Articles section of the Resources page a A ia y a A A Should the white gear be worn out as well the entire procedure is included on page 5 49 error The 49 xxxx indicates a firmware error Causes include dated firmware software is sues bad memory DIMMs EIO devices network cables firmware DIMM or formatter
18. o the top of the power supply 13 REMOVE PLASTIC POWER SUPPLY GUIDE CA BLE GUIDE AND TONER CARTRIDGE GUIDE These are all inside the paper tray cavity in the right rear of the printer Fig 8 a Toremove the power supply guide a push in on the retaining button f in Fig 4 and slide the guide toward the rear of the printer b The cable guide b is secured by a retaining tab at the bottom use a flat blade screwdriver or pick to release this and pull the guide out You will not be able to remove it completely without unweaving the cable but this is not necessary you can just allow the guide to dangle c Finally the toner guide c is secured by a spring that attaches to the printer chassis Use a spring hook to detach this spring from the guide and the guide should just fall out 14 REMOVE SWING PLATE ASSEMBLY First re move the white gear that overlaps the front of the assembly by pulling the small retaining tab ar row Fig 9 away from the metal shaft and sliding the gear off Then remove three screws circles Fig 9 and pull the swing plate assembly out Li od frached t to power supply When re installing the new swing plate assembly make sure that it is mounted flush to the printer chassis and that the swing arm moves freely 15 REASSEMBLE PRINTER Reverse the above steps to re assemble the printer 7 Left side i prn A E gt N e me 4 i e F cae p
19. r off and on During the five minute wait do not use the printer menus 10 After it reaches the Ready state wait another five minutes 11 Print a configuration page to verify all information has been copied into the NVRAM on the new board Ordering the right part e Formatter base models Q3653 6 904 e Formatter network models Q3652 67905 e DC controller RM1 1108 NVRAM chips on the DC controller and the formatter record the iden tity of the printer model and all par ticular information about the printer including page counts eceeecec eee eee eee eee ee ee ee ee ee eee ee eee ooss oso co o sssocsosS op co ooo os nk o SERVICE EDGE FALL 2011 For printer info one site lbrty com LIBERTY PARTS TEAM INC te 3517 W BELTLINE HWY U S Postage MADISON WI 53713 RSS tae A 888 444 8778 Madison WI WWW LBRTY COM e e a ee ee ee ee a sosie ome A A EE AAA A a A A o ia A ci a Y 5 Y t gt ri hd ee ee ee ee EE AE ee AE AE rl 2 ee ee Se eS See eee sa a a eel Sa
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