Lexmark T520 Service Manual
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- Lexmark T520 | Service Manual - Page 1
Lexmark™ T52x 4520-xxx • Table of Contents • Start Diagnostics • Safety and Notices • Trademarks • Index • Manuals Menu Lexmark and Lexmark with diamond design are trademarks of Lexmark International, Inc., registered in the United States and/or other countries. - Lexmark T520 | Service Manual - Page 2
errors. Changes are periodically made to the information herein; these changes will be incorporated in later editions. Improvements or changes in © Copyright Lexmark International, Inc. 2001. All rights reserved. UNITED STATES GOVERNMENT RESTRICTED RIGHTS This software and documentation - Lexmark T520 | Service Manual - Page 3
Options 1-2 Maintenance Approach 1-3 Tools Required for Service 1-3 Acronyms 1-4 Diagnostic Information 2-1 Start 2-1 Service Error Codes 2-2 User Status Messages 2-22 User Error Messages 2-25 Power-On Self Test (POST 2-35 Symptom Tables 2-36 Service Checks 2-39 Charge Roll Service Check - Lexmark T520 | Service Manual - Page 4
ID 3-20 Restore EP Factory Defaults 3-21 Print Tests 3-22 Print Quality Test Pages 3-23 Print Test with RIP (Controller Board) Removed 3-24 Printing Menu Settings Page 3-24 Autocompensator Operation 3-25 Autoconnect System, Paper Tray Options, Envelope Feeder 3-26 iv Service Manual - Lexmark T520 | Service Manual - Page 5
Flag Assembly Removal 4-34 Fuser Lamp Removal 4-35 Fuser Lower Exit Guide Assembly Removal 4-35 High Voltage Power Supply Removal 4-36 Integrated Tray Compensator Assembly Removal. . . . . . 4-37 Integrated Tray Compensator Pick Roll Asm Removal . . 4-38 Interconnect Board Assembly Removal 4-39 - Lexmark T520 | Service Manual - Page 6
Board 5-9 Controller Board - Non Network 5-10 Controller Board - Network 5-11 Fuser Board 5-12 Interconnect Board 5-14 Envelope Feeder Board 5-16 Duplex Unit Board 5-18 Preventive Maintenance 6-1 Safety Inspection Guide 6-1 Lubrication Specifications 6-1 Scheduled Maintenance 6-2 Parts - Lexmark T520 | Service Manual - Page 7
7-22 Assembly 11: Hot Roll Fuser 7-24 Assembly 12: Transfer 7-26 Assembly 13: Charging 7-28 Assembly 14: Electronics Duplex Unit 7-54 Assembly 24: Envelope Feeder 7-60 Assembly 25: High-Capacity Feeder 7-62 Assembly 26: Kiosk - Vertical Paper Adapter 7-72 Assembly 27: Kiosk - Horizontal Paper - Lexmark T520 | Service Manual - Page 8
4520-xxx viii Service Manual - Lexmark T520 | Service Manual - Page 9
4520-xxx Notices and Safety Information Laser Notices The following laser notice labels may be affixed to this printer as shown: Laser Advisory Label Notices and Safety Information ix - Lexmark T520 | Service Manual - Page 10
4520-xxx Class 1 Laser Statement Label x Service Manual - Lexmark T520 | Service Manual - Page 11
in the wavelength region of 770-795 nanometers. The laser system and printer are designed so there is never any human access to laser radiation above a Class I level during normal operation, user maintenance, or prescribed service condition. Laser Der Drucker erfüllt gemäß amtlicher Bestätigung der - Lexmark T520 | Service Manual - Page 12
laser de Classe I. Les produits laser de Classe I sont considérés comme des produits non dangereux. Cette imprimante est équipée d'un laser son système laser sont conçus laser supérieurs à des rayonnements de Classe I . Avvertenze sui prodotti laser 795 nanometri. Il sistema laser e la stampante sono - Lexmark T520 | Service Manual - Page 13
de la Clase I durante su uso normal, el mantenimiento realizado por el usuario o cualquier otra situación de servicio técnico. Declaração sobre Laser A impressora está certificada nos E.U.A. em conformidade com os requisitos da regulamentação DHHS 21 CFR Subcapítulo J para a Classe I (1) de produtos - Lexmark T520 | Service Manual - Page 14
galliumarsenid laser, som arbejder på bølgelængdeområdet 770-795 nanometer. Lasersystemet og printeren er udformet således, at mennesker aldrig udsættes for en laserstråling over Klasse I-niveau ved normal drift, brugervedligeholdelse eller obligatoriske servicebetingelser. xiv Service Manual - Lexmark T520 | Service Manual - Page 15
kraven i IEC 60825. Laserprodukter i Klass I anses ej hälsovådliga. Skrivaren har en inbyggd laser av Klass IIIb (3b) som består av en laserenhet av gallium-arsenid på 5 milliwatt som ndning, underhåll som utförs av användaren eller annan föreskriven serviceåtgärd. Notices and Safety Information xv - Lexmark T520 | Service Manual - Page 16
Klasse I-laserprodukter er ikke å betrakte som farlige. Skriveren inneholder internt en klasse IIIb (3b)-laser, som består av en gallium-arsenlaserenhet som avgir stråling i bølgelengdeområdet 770- manteniment d'usuari ni durant els serveis que satisfacin les condicions prescrites. xvi Service Manual - Lexmark T520 | Service Manual - Page 17
4520-xxx Japanese Laser Notice Chinese Laser Notice Notices and Safety Information xvii - Lexmark T520 | Service Manual - Page 18
Korean Laser Notice Safety Information • This product is designed, tested and approved to meet strict global safety standards with the use of specific Lexmark components. The safety features of some parts may not always be obvious. Lexmark is not responsible for the use of other replacement parts - Lexmark T520 | Service Manual - Page 19
é de certains éléments ne sont pas toujours évidentes. Lexmark ne peut être tenu responsable de l'utilisation d'autres pièces de rechange. • Les consignes d'entretien et de réparation de ce produit s'adressent uniquement à un personnel de maintenance qualifié. • Le démontage et l'entretien de ce - Lexmark T520 | Service Manual - Page 20
nicht immer offensichtlich. Sofern Teile eingesetzt werden, die nicht von Lexmark sind, wird von Lexmark keinerlei Verantwortung oder Haftung für dieses Produkt übernommen. • Die personal cualificado debe ser consciente de este peligro y tomar las precauciones necesarias. xx Service Manual - Lexmark T520 | Service Manual - Page 21
aprovado para satisfazer os padrões globais de segurança na utilização de componentes específicos da Lexmark. As funções de segurança de alguns dos componentes podem não ser sempre óbvias. A Lexmark não é responsável pela utilização de outros componentes de substituição. • As informações de seguran - Lexmark T520 | Service Manual - Page 22
4520-xxx Chinese Safety Information Korean Safety Information Ozone Information This product does not produce measurable amounts of ozone gas. xxii Service Manual - Lexmark T520 | Service Manual - Page 23
a general description of the printer, options, and the maintenance approach used to repair it. General environmental and safety instructions as well as special tools and test equipment are listed in this chapter. • "Diagnostic Information" contains a service error code table, user status message - Lexmark T520 | Service Manual - Page 24
4520-xxx xxiv Service Manual - Lexmark T520 | Service Manual - Page 25
designed to attach to IBM-compatible personal computers and to most computer networks. The Lexmark T laser printers are available in the following models: Model Name Lexmark T522 Lexmark T522n Lexmark T520 Lexmark T520n Type 4520-210 Non network 4520-220 Network 4520-001 Non network 4520-002 - Lexmark T520 | Service Manual - Page 26
UAT (Universally Adjustable Tray) 2000 Sheet High Capacity Feeder Envelope Feeder Duplex Unit - 250 Sheet (For T520 & T520n) Duplex Unit - 500 Sheet (For T522 & T522n) Hard Disk - 5.0 & GB Forms Hard Disk - 5.0 & GB or Larger Vertical Kiosk Presenter Horizontal Kiosk Presenter 1-2 Service Manual - Lexmark T520 | Service Manual - Page 27
in this manual leads you to the correct field replaceable unit (FRU) or part. Use the service error codes, user status messages, user error messages, service checks, and diagnostic aids to determine the printer problem and repair the failure. After you complete the repair, perform tests as needed - Lexmark T520 | Service Manual - Page 28
Random Access Memory Original Equipment Manufacturer Photoconductor Power-On Reset Power-On Self Test Raster Imaging Processor Read Only Memory Synchronous Dual Random Access Memory Static Random Access Memory Used Parts Return Volts alternating current Volts direct current 1-4 Service Manual - Lexmark T520 | Service Manual - Page 29
or three-digit error code that provides the user with information that explains a problem with a print cartridge, paper jam, option, port, and so on. If a user error message is displayed, go to the "User Error Messages" on page 2-25. If your machine completes the "Power-On Self Test (POST)" on page - Lexmark T520 | Service Manual - Page 30
can POR the printer to temporarily recover from the error condition. Error Code Action 900 RIP Software Contact the next support level or call Lexmark. 901 Engine Flash Indicates that the flash which the engine board code is programmed into is bad. Replace the engine board. 902 General These - Lexmark T520 | Service Manual - Page 31
4520-xxx Error Code Action 914 DC Pick Motor: No encoder feedback Check the integrated paper tray (tray 1) for correct paper loading. Reload the paper and POR the printer. If the error continues, go to the "Input Tray(s) Service Check" on page 2-62. 917 Transfer Roll Indicates a problem in the - Lexmark T520 | Service Manual - Page 32
for correct installation and secure ground. If no problem is found, replace the FRUs in the following order: 1. Controller board 2. Engine board 3. Interconnect board Note: The controller software also can cause a 939 error code. Contact your next level for software support. 2-4 Service Manual - Lexmark T520 | Service Manual - Page 33
has been installed. • If all the above are correct, replace the LVPS assembly. A 941 error can be created by a defective code overlay card, a code upgrade, a defective IPDS or a PRESCRIBE card. These should be checked before replacing the controller board. Replace the controller board. Indicates - Lexmark T520 | Service Manual - Page 34
failure is displayed, perform a power on reset (POR) to see if the ECC error correction code can reflash NAND. If this does not fix the problem, replace the system board. 960 RAM Memory Error Indicates a DRAM Memory Error on the controller board. Replace the controller board. 961 RAM in Slot - Lexmark T520 | Service Manual - Page 35
by the specified device. Invalid command received by the specified device. Invalid command parameter received by the specified device. Note: Service Errors 980 thru 984 can be one of the following: engine board, duplex, tray x (1,2,3,4 or 5), envelope feeder or output bin. Indicates - Lexmark T520 | Service Manual - Page 36
XX XX XX Byte 5 Byte 6 Byte 7 Byte 8 Sub Error Codes for 9XX and 2XX Error Codes The sub error codes are helpful troubleshooting a paper path problem, especially paper jams in the base printer, envelope feeder and duplex unit. When a 9XX or 2XX error displays: 1. Press and hold Return and press - Lexmark T520 | Service Manual - Page 37
Error Codes Each status byte has a different level of troubleshooting value for each area of the printer. The following table displays up to 8 status bytes of data. Some or all of these bytes may be used to help diagnose a printer problem. These status bytes are designed to help isolate paper jams - Lexmark T520 | Service Manual - Page 38
tray pass thru sensor was never actuated by a piece of media. (x-1=media size) (x-2=media source) (x3=paper source where paper jam was detected) *Run the sensor test for the option tray that is displaying the error code and check the pass thru sensor for that tray for correct operation. *Check for - Lexmark T520 | Service Manual - Page 39
jam occurred. 84 00 10 The main motor ID failed to identify either motor after two tries. Possible causes for this error are: *The main drive motor has stalled. *An incorrect main drive motor/gearbox assembly has been installed. 84 xx 17 There is an envelope or envelopes in the envelope feeder - Lexmark T520 | Service Manual - Page 40
size paper in the tray. 84 xx 1D The envelope feeder pass thru sensor never deactivated. The display of this code indicates that an envelope never crossed over the sensor flag and passed beyond the sensor, or the flag and sensor are not operating properly. Go to the "Envelope Feeder Service Check - Lexmark T520 | Service Manual - Page 41
of paper. x2 (x1=Media Size, x2=Media Source) Check tray x auto compensator and tray parts for correct operation. If no problem is found, go to the "Input Tray(s) Service Check" on page 2-62. 84 xx 22 x1 x2 This code indicates that the media activated the input sensor before the printer EP - Lexmark T520 | Service Manual - Page 42
run the print test from the diagnostic test menu). If the media stops over the narrow media sensor again, check the flag and sensor for correct operation. 89 xx 0B x1 The fuser exit sensor may be bouncing. *This error can be caused by a failing exit sensor or system board. 2-14 Service Manual - Lexmark T520 | Service Manual - Page 43
board. Also, the system board may be failing. 8D 00 00 The fuser exit sensor was never activated by the leading edge of the media fed through the printer. *This error can be displayed after a 201 paper jam. *This can be caused by a defective fuser exit sensor assembly. Enter the diagnostic tests - Lexmark T520 | Service Manual - Page 44
Error Code Data - Note: xx can be any value. Explanation 8E x1 0B The DC auto compensator failed or stalled when trying to feed a sheet of media. 8E xx 11 It took too long for the DC auto compensator motor to come up to speed. 8E xx 13 x1 Late feeding from a paper - Lexmark T520 | Service Manual - Page 45
yy=The temperature that the fuser wants to reach. zz=00 The fuser temperature did not change enough from the fuser lamp temperature at turn on. 01 The fuser temperature rose more than desired from the fuser temperature at turn on. 922 Service - Fuser Error (Fuser failed to reach standby temperature - Lexmark T520 | Service Manual - Page 46
detection temperature.' 04 After Hot Roll lamp detection, did not reach steady state control in time. 05 The Hot Roll did not reach operating temperature in time. 923 Service - Fuser Error (Fuser over temperature) EN 12 xx yy -- 1 EN -- -- -- -2 This sub error code is displayed anytime that the - Lexmark T520 | Service Manual - Page 47
lamp is detected. xx=00 Lamp detection performed and found an error. 01 It took long to do lamp detection and NVRAM detected a previous wrong lamp detected. yy=Actual Temperature zz=The temperature that the fuser was trying to reach. Envelope Feeder Sub Error Codes First 6 Bytes Sub Error Code - Lexmark T520 | Service Manual - Page 48
never activated the envelope feeder pass thru sensor or the sensor never sensed the presence of an envelope. (x1=Media Size)(x2=Media Source) *Check to make sure the envelope feeds to the pass thru sensor. *Check to see if the envelope actuates the pass thru sensor flag. 2-20 Service Manual - Lexmark T520 | Service Manual - Page 49
0E 13 15 18 3D Explanation No duplex error. No problem was reported to the engine by the duplex system card. The leading edge of the sheet of paper never arrived at the input sensor. The duplex unit engine board never received media notification from the printer. The trailing edge of the sheet of - Lexmark T520 | Service Manual - Page 50
data is processed, but the printer processes all paper currently in the printer paper path. Press Go to return to Ready. The printer is flushing corrupted print data and the current print job is being discarded. No button actions are possible while this message is displayed. 2-22 Service Manual - Lexmark T520 | Service Manual - Page 51
is processed, but the printer processes all paper currently in the printer paper path. Press Go to return to Ready after the page prints. Press Menu to take the printer out of Ready and enter the TESTS MENU (Busy state). Press Select for the values. Press Menu until Reset Printer is on the second - Lexmark T520 | Service Manual - Page 52
Performing Self Tests Not Ready (Press Go) Resetting Printer Formatting Flash (Do Not Power Off) Program Flash (Do Not Power Off) Formatting Disk Status Action The printer or macros are being written to flash memory. Do not perform any button actions while this message is displayed. The disk is - Lexmark T520 | Service Manual - Page 53
setting possible while this changed in the menus. message is displayed. User Error Messages User Error Message 200 Paper Jam Remove Cartridge 201 Paper Jam Remove Cartridge 202 Paper Jam Open Rear Door Explanation Paper is jammed at the printer Input Sensor. Open the printer upper front door and - Lexmark T520 | Service Manual - Page 54
the jammed pages. 250 Paper Jam Check MP Feeder Paper is jammed in the multipurpose feeder. 260 Paper Jam Paper is jammed in the envelope feeder. Check Envelope Feeder 27X Paper Jam Check Output Paper is jammed in output bin. Open the rear door to access the jammed pages. Insert Cartridge or - Lexmark T520 | Service Manual - Page 55
allowed to print, then they are not reprinted once a good print cartridge is inserted. If this does not fix the problem, go to the "Smart Contact Assembly Service Check" on page 2-100. 34 Short Paper The printer determines the paper length is too short to print the formatted data. This occurs when - Lexmark T520 | Service Manual - Page 56
printer is reset. 58 Too Many Trays Attached This error code is displayed when too many input trays are attached to the printer. 58 Too Many Disks Installed This error is displayed when too many disks are attached to the printer. 61 Defective Disk This error code is displayed when the printer - Lexmark T520 | Service Manual - Page 57
, and charge roll at this interval to maintain the print quality and reliability of the printer. The parts are available as a maintenance kit. For more information, go to "Scheduled Maintenance" on page 6-2. This error displays when the microcode to be programmed in the engine flash code module has - Lexmark T520 | Service Manual - Page 58
Press Go to return the printer to the Ready state. User Message Toner Low Tray X Missing Explanation If the toner cartridge is low, then "Toner Low" displays. The Toner Low condition clears whenever the then Tray 5. Tray X Missing status clears whenever Tray X is reinserted. 2-30 Service Manual - Lexmark T520 | Service Manual - Page 59
clears whenever Tray X goes empty, or Tray X is removed. When Tray X is reinserted, it is examined and the appropriate status, if any, displays. Note: The printer cannot detect when the envelope feeder or multipurpose feeder are low. Diagnostic Information 2-31 - Lexmark T520 | Service Manual - Page 60
is locked on a particular link, the link indication displays. If the printer is ready to process any link, no messages display. Link messages are listed in the to PCI connector X. Standard Infrared port, if available. Infrared Port X, X=1,2,3, is attached to PCI connector X. 2-32 Service Manual - Lexmark T520 | Service Manual - Page 61
Check Duplex Connection Explanation Check Envelope Feeder Connection. Check Tray X (X=1,2,3,4 or 5). Check Duplex Unit Connection. The messages in the following table can occur in two ways. The specified device could have been removed from the printer, for instance to clear a paper jam. Otherwise - Lexmark T520 | Service Manual - Page 62
printer automatically clears the message once the option is removed. Once the job is complete, turn off the printer and attach the option again. This message displays when the duplex front access cover is not installed. This message displays when the duplex rear door is open. 2-34 Service Manual - Lexmark T520 | Service Manual - Page 63
then they all turn off. 6. "Performing Self Test" appears on the display. - The high capacity option elevator tray moves to the uppermost position if installed. - The duplex unit is checked if installed. 7. "Busy" appears on the display. 8. The fuser lamp turns on. The fuser takes longer to warm up - Lexmark T520 | Service Manual - Page 64
, sounds 5 beeps and does not complete POST. Paper feed problems - Base printer or Integrated 500 Paper Tray Paper jams at exit of Redrive Assembly - No Duplex Unit installed. Paper jams at exit of Redrive Assembly - Duplex Unit installed. Fuser Solenoid fails to operate. Print quality - Black page - Lexmark T520 | Service Manual - Page 65
on page 2-100. Symptom Table - High-Capacity Feeder (2000-Sheet) Symptom • The printer does not recognize the high capacity feeder installed. • Paper feed problem with the high capacity feeder. Action Go to the "High-Capacity Feeder Input Tray Service Check" on page 2-66. Diagnostic Information - Lexmark T520 | Service Manual - Page 66
feed problem with Duplex. • Paper jams at Paper Removal Tray. • Paper skews in the Duplex Unit. • Paper fails to pass from lower option thru the Duplex Unit. Go to the "Duplex Unit Service Check" on page 2-45. Symptom Table - Envelope Feeder Symptom Envelopes do not feed from the envelope feeder - Lexmark T520 | Service Manual - Page 67
Anytime the engine board is replaced, the Configuration ID must be reset in NVRAM on the new engine board. Go to "Setting Configuration ID" on page 3-20. Review the following information before performing any service checks. • Paper feed problems (especially paper jams): Go to "Viewing the Error Log - Lexmark T520 | Service Manual - Page 68
remove the roll from the printer. Leave the paper wrapped around the charge roll until it is reinstalled. FRU 1 Charge Roll Assembly 2 Left Side Charge Roll Link Action Check the charge roll for correct installation, toner buildup, marks, cuts or other signs of contamination or damage. Replace as - Lexmark T520 | Service Manual - Page 69
FRU 3 Right Side Charge Roll Link Right Charge Roll Bushing Action Check the right side charge roll link assembly for correct assembly operation. If incorrect, replace the charge roll link assembly with the charge roll link assembly kit. If correct, check the right charge roll link assembly bearing - Lexmark T520 | Service Manual - Page 70
board. If the voltage is correct, check the continuity between J4-1 and J4-3 on the cable. If no change in continuity occurs as the switch is activated, replace the cover open switch/cable assembly. If the continuity changes as the switch is activated, replace the engine board. 2-42 Service Manual - Lexmark T520 | Service Manual - Page 71
-Capacity Feeder Input Tray Service Check" on page 2-66. If the base printer continues to not operate correctly, remove any other attached paper handling options. Observe all necessary ESD precautions when removing and handling the controller board, engine board or any of the installed option cards - Lexmark T520 | Service Manual - Page 72
cables from the engine board. Check for +5 V dc at the engine board test point. If incorrect, replace the FRUs in the following order: 1. Engine board 2. Interconnect board If correct, turn the printer off and reconnect one cable at a time until you find the defective assembly. Service Tip: A short - Lexmark T520 | Service Manual - Page 73
4520-xxx Duplex Unit Service Check The printer does not recognize the Duplex Unit is attached. The printer does not recognize tray options below the duplex unit are installed. FRU 1 Fuse F1 on Duplex Unit System Board 2 Autoconnect Cables/ Connectors Action If fuse F1 is blown, replace the fuse. - Lexmark T520 | Service Manual - Page 74
the duplex exit sensor for correct installation and free movement of the sensor flag. Check to make sure the sensor cable is connected to J8 on the system board. If no problem is found, replace the FRUs in the following order: 1. Exit sensor assembly 2. Duplex unit system board 2-46 Service Manual - Lexmark T520 | Service Manual - Page 75
4520-xxx 230 Paper Jam - Check Duplex message displays. The page is not duplexed and only exits half way out of the redrive. FRU 1 Duplex Stepper Motor Action Check the stepper motor cable for cuts or pinched wiring. Check the routing of the motor leads along the left side of - Lexmark T520 | Service Manual - Page 76
. If you find damage, replace the damaged cable/connector assembly. Remove the envelope feeder and check the voltages at the autoconnect on the front of the printer. If incorrect, check the interconnect board. If correct, reinstall the envelope feeder and continue with step 3. 2-48 Service Manual - Lexmark T520 | Service Manual - Page 77
4520-xxx FRU 3 Autoconnect on the Envelope Feeder. Action Check for any signs of damage to the connector or contacts. If you find damage, replace the damaged cable/connector assembly. Disconnect the autoconnect cable at J1 on the envelope system board and measure the following voltages: J1-3 - Lexmark T520 | Service Manual - Page 78
, replace the envelope system board. If correct, check the voltage at J3-2. The voltage changes from 0 to +5 V dc when the flag is moved in and out of the sensor. If incorrect, replace the sensor assembly. If this does not fix the problem, replace the envelope system board. 2-50 Service Manual - Lexmark T520 | Service Manual - Page 79
flag for damage, correct installation and operation. If incorrect, repair or replace the flag. Check the sensor to make sure it is installed correctly and the sensor cable is properly connected to the envelope system board. If correct, perform the Envelope Feed Sensor Test to check both the sensor - Lexmark T520 | Service Manual - Page 80
disconnect J4 and measure the voltage again. If incorrect, replace the envelope feeder system board. If correct, replace the D.C. motor assembly. 260 Paper Jam displays, unable to clear and envelopes fail to feed from the hopper. Kick rolls are not rotating. FRU 1 Main Drive Belt 2 Gears 3 Clutch - Lexmark T520 | Service Manual - Page 81
4520-xxx 260 Paper Jam displays, unable to clear and envelopes fail to feed from the hopper. Kick rolls are rotating. Check the deflector gap adjustment before continuing this service check. FRU 1 Deflector Gap Adjustment 2 Weight Assembly 3 Envelope Edge Guide Action Check the deflector gap - Lexmark T520 | Service Manual - Page 82
. Check for a missing, broken or incorrectly installed restraint roll bias spring. If incorrect, reinstall or replace the spring. 260 Paper Jam displays, an envelope stopped in the paper path of the feeder and an envelope also stopped in the base printer paper path. FRU 1 Latch Lever Action Check - Lexmark T520 | Service Manual - Page 83
Fan to Engine Board Cable 3 Error Code 927 (Fan runs) 4 Error Code 927 (Fan not running) Action Manually spin the fan and check that it rotates freely. Check the cable connection to the engine board, J1 for correct installation. Check the continuity of the cable. If incorrect, replace the cable - Lexmark T520 | Service Manual - Page 84
4520-xxx Fuser Service Check Cold Fuser Service Check Error codes 920, 921, and 922 may display for a cold fuser failure. A 920 error caused by low line voltage can sometimes be cleared by turning the machine off and then on again. A 925 service error indicates the wrong fuser lamp is installed. Be - Lexmark T520 | Service Manual - Page 85
the fuser. • Verify that the lamp is installed correctly. If correct, check the continuity of the fuser top cover assembly by verifying the lamp contacts on the right contact assembly. If incorrect, check continuity of the fuser lamp. If incorrect replace the lamp. If correct replace the fuser top - Lexmark T520 | Service Manual - Page 86
924 error. CAUTION: The fuser may be hot, use caution before removing or servicing. FRU 1 Fuser Cover Assembly (Assembly includes Thermistor and Thermal Fuses.) 2 Fuser Control Board 3 Fuser to Engine Board DC Cable Action Check for damage to the thermistor assembly. If damage is found, replace - Lexmark T520 | Service Manual - Page 87
Fuser Backup Roll Bearings Fuser Backup Roll Fuser Mechanical Parts Action Perform the print test with the RIP controller board removed. Check the voltage on J16-3 on the engine board. The voltage should measure approximately 1.6 V dc as the thermistor goes from cold to hot. If incorrect, replace - Lexmark T520 | Service Manual - Page 88
on the fuser control board. If incorrect, replace the fuser control board. 5 Interconnect Board Engine Board If no problems are found with the fuser solenoid, LVPS, DC cable or fuser control board, replace the FRUs in the following order: 1. Engine board 2. Interconnect board 2-60 Service Manual - Lexmark T520 | Service Manual - Page 89
is manually moved in and out of the sensor. Service Tip: Run a Diagnostic Print Test in the continuous mode with the controller board removed. A defective input sensor or circuit causes the first copy to exit only partially through the fuser assembly. FRU 1 Input Sensor Flag 2 Engine Board 3 Input - Lexmark T520 | Service Manual - Page 90
properly feeding paper. For 990 Error Code- Service Tray X, X= displays the number of the tray that has a problem or needs service. FRU 1 Tray X Option System Board or Compensator Assembly or Autoconnect Cable Action Check the autoconect cables and connectors for any signs of damage. Replace if - Lexmark T520 | Service Manual - Page 91
Paper Jam message displays, Paper jammed over the Pass Thru Sensor. (The printer displays the value of X for the paper tray where the error occurs. Example: 241 is a Paper Jam Tray 1) FRU 1 Pass Thru Sensor and Flag Assembly 2 Power Takeoff Shaft and Spring, Bevel Gear, Feedroll Gear, Drive Roll - Lexmark T520 | Service Manual - Page 92
X has paper in the tray. FRU 1 Paper Out Sensor Flag 2 Paper Out Sensor (On Option System Board) Action Check the paper out sensor flag for correct operation and installation. If correct, replace the option system board. (The paper out sensor is mounted on the system board). 2-64 Service Manual - Lexmark T520 | Service Manual - Page 93
autoconnect cable(s) for correct installation at the tray x system board. If correct, check the continuity of the autoconnect cable(s). If correct, replace the tray x system board. If incorrect, replace the cable. Paper from Tray X does not reach the Pass Thru Sensor. Service Tip: Check the media - Lexmark T520 | Service Manual - Page 94
to the base printer to obtain accurate results. Service Tip: Be sure the paper size switch is set to the correct paper size setting and the rear paper guides are in the correct locations for the size of paper installed in the high-capacity feeder tray. Service Tip: Check the other paper sources to - Lexmark T520 | Service Manual - Page 95
does not recognize that the high-capacity input tray is installed. FRU 1 High-Capacity Feeder Autoconnect Mechanical Check 2 Base Printer or option mounted above 3 LVPS Option System Board Action Check the high capacity feeder input tray to make sure it is mounted correctly and is not pushed - Lexmark T520 | Service Manual - Page 96
continues to be incorrect, replace the high capacity feeder option system board. If the voltage measures correctly, check the cable. If the cable is damaged, replace as necessary. If no problem is found with the cable, replace the high capacity feeder option control board. 2-68 Service Manual - Lexmark T520 | Service Manual - Page 97
Paper Jam message displays, Paper jammed over the Pass Thru Sensor. (X=The printer displays the value of X for the paper tray where the error occurs. Example: 242 is a Paper Jam Tray 2) FRU 1 Pass Thru Sensor and Flag Assembly 2 Power Takeoff Shaft and Spring, Bevel Gear, Feedroll Gear, Drive Roll - Lexmark T520 | Service Manual - Page 98
Out Sensor Flag 2 Paper Out Sensor (On Option System Board) Action Check the paper out sensor flag for correct operation and installation. If correct, replace the high capacity feeder system board. (The paper out sensor is mounted on the high capacity feeder system board). 2-70 Service Manual - Lexmark T520 | Service Manual - Page 99
-1 (orange). The voltage measures approximately +5 V dc. If incorrect, replace the high capacity feeder option control board. The elevator tray down button does not operate. The tray moves to the upper position. Service Tip: Open the high-capacity feeder front door and check the black rubber bumper - Lexmark T520 | Service Manual - Page 100
for glazing or contamination. Replace as required. It is advisable to replace all four wear strips at the same time. The elevator tray does not move up or down. The printer recognizes that the option is installed. FRU 1 DC Drive Motor HighCapacity Feeder Option System Board Action Be sure the - Lexmark T520 | Service Manual - Page 101
. FRU 1 DC Drive Motor Assembly High Capacity Feeder System Board Action Check the voltages at J1 on the high capacity system board. The voltages measure as follows: Static (Motor 7.5 and 10.5 ohms. If incorrect replace the motor. If correct, replace the system board. Diagnostic Information 2-73 - Lexmark T520 | Service Manual - Page 102
-7 (Brown) A5 If any position does not measure continuity when selected, replace the paper size switch assembly. If the switch assembly is operating correctly, replace the high capacity feeder option control board. 24X Paper Jam Check Tray X Message displays when Tray X is empty. No Tray X Message - Lexmark T520 | Service Manual - Page 103
at J3-1 (gray). The voltage measures approximately +24 V dc. If incorrect, disconnect the paper low switch cable from J3 and measure the voltage again on J3-1. If incorrect, replace the high capacity feeder option control board. If correct, check the cable for a short between pins 1 and 2 on the - Lexmark T520 | Service Manual - Page 104
signs of damage. Check to make sure the belt is tracking correctly on the lower section of the drive pulley and lead screw pulleys. 2-76 Service Manual - Lexmark T520 | Service Manual - Page 105
A service error code 936 - Transport Motor may be displayed. Check the voltage at J12-6 on the engine board. It measures approximately +5 V dc when the motor is not running and goes to 0 V dc when the motor is running. If incorrect, replace the engine board. If this does not fix the problem, replace - Lexmark T520 | Service Manual - Page 106
Motor does not turn, no gear error code 936 or User message 201 Paper Jam displays. Action Check the voltages at J12 on the engine board. Pin number and voltage: J12- the voltage is incorrect, replace the FRUs in the following order: 1. Main drive motor assembly 2. Engine board 2-78 Service Manual - Lexmark T520 | Service Manual - Page 107
the continuity of the operator panel cable. If incorrect, replace the cable. If correct, replace the operator panel assembly. Operator Panel Display Service Check Service Tip: The printer has detected a problem with the engine board, operator panel cable or operator panel assembly if POST does - Lexmark T520 | Service Manual - Page 108
causes the printer to fail POST displaying all diamonds on the operator panel with no beeps. Check the voltage at Pin J11-1 and J11-3. The voltage measures approximately +5 V dc. If incorrect, replace the FRUs in the following order: 1. Operator panel assembly 2. Engine board 2-80 Service Manual - Lexmark T520 | Service Manual - Page 109
from the menu if the SDRAM Memory card is correctly installed and not broken or damaged. If the test fails, replace the SDRAM card. If the problem continues, replace the controller board. Hard Disk Option Service Tip: The Lexmark T printers support one hard disk option. Check to make sure only one - Lexmark T520 | Service Manual - Page 110
grounded. If you find no problem, contact your next level of support before replacing the network card. Error Code 977 - Network Card X A 977 error displays when the RIP software detects that a network card is installed in slot x on the interconnect board but cannot establish communications with - Lexmark T520 | Service Manual - Page 111
Engine Board Printer fails to display Remove Paper Standard Bin message. Output Bin Sensor Test fails. 2 Output Bin Sensor Flag Action Check the voltage at J6-1. It measures +5 V dc when the flag is in the sensor and 0 V dc when the flag is out of the sensor. If the voltage does not change, replace - Lexmark T520 | Service Manual - Page 112
pick roll shaft assembly is not providing enough torque if the pick rollers are not picking the paper correctly. Replace the autocompensator assembly. Check the wear strips for excessive wear, scratches or rough spots. Replace the wear strips if a problem is found. 2-84 Service Manual - Lexmark T520 | Service Manual - Page 113
most common cause of this problem is paper curl. Remove the paper from tray x and check for the natural curvature in the paper. Reinstall the paper in the correct manner. If the problem persists, it may be necessary to reduce the stack height. Replace both pick rolls if the paper appears to be flat - Lexmark T520 | Service Manual - Page 114
) and invoking the Parallel Diagnostic Test. This test helps isolate the printer from the parallel cable and host. The test provides failure information on the display for approximately three seconds. If the test indicates that a problem is detected, replace the controller board. 2-86 Service Manual - Lexmark T520 | Service Manual - Page 115
Check The printhead assembly does not contain any service replaceable parts or components. If service error code 930 displays, the wrong printhead is installed in the printer. Note: A 201 paper jam may also indicate a failing printhead. The paper may have jammed prior to or at the input sensor - Lexmark T520 | Service Manual - Page 116
-xxx Print Quality Service Check Service Tip: Before troubleshooting any print quality problems do the following: • Install another print cartridge if available before proceeding with the service checks. • Use Tray 1 to test for print quality of the base printer. • Replace the charge roll if it is - Lexmark T520 | Service Manual - Page 117
drum. FRU 1 High Voltage Contacts 3 Charge Roll Conductive Bushing 2 HVPS 3 HVPS Cable (Part of Front Harness Cable) Engine Board Action Check the high voltage contacts on the right side frame to ensure they fit securely and are not pitted, contaminated or damaged. If incorrect, replace - Lexmark T520 | Service Manual - Page 118
replace the engine board. Check the front cable harness at J10 on the engine board and at CN1 on the HVPS to make sure the harness is connected properly. If connected properly, check the continuity of the cable harness. If there is no continuity, replace the front cable harness. 2-90 Service Manual - Lexmark T520 | Service Manual - Page 119
transfer roll for binds or a contaminated shaft or bearings. Blurred print can also be caused by incorrect feeding from one of the input paper sources, paper trays, duplex unit or envelope feeder. Check the high voltage contacts to ensure they are not bent, corroded or damaged. Replace as necessary - Lexmark T520 | Service Manual - Page 120
assembly 2. Main drive gearbox assembly Replace the FRUs in the following order: 1. Toner cartridge 2. Charge roll 3. Developer drive assembly Replace the toner cartridge. Replace the FRUs in the following order: 1. Redrive assembly 2. Fuser assembly Replace the transfer roll. 2-92 Service Manual - Lexmark T520 | Service Manual - Page 121
519 inch) apart Action Replace the redrive assembly. Replace the FRUs in the following order: 1. Alignment assembly 2. Main drive gearbox assembly Replace the FRUs in the following order: 1. Toner cartridge 2. Main drive gearbox assembly Replace the redrive assembly. Replace the alignment assembly - Lexmark T520 | Service Manual - Page 122
4520-xxx Print Quality - Background Service Tip: Some background problems can be caused by rough papers, non-Lexmark toner cartridges or if the media texture is set to the rough setting. Some slick or coated papers may also cause background. Some problems occur with printers that run a large amount - Lexmark T520 | Service Manual - Page 123
engine board. Measure the voltages from J10 to printer ground. Printer Idle J10-1 approximately 0 V dc J10-2 approximately 4 V dc J10-4 approximately 0 V dc Printer , replace the harness cable. If there is continuity, replace the HVPS. If this does not correct the problem, replace the engine board. - Lexmark T520 | Service Manual - Page 124
while you run a print test sample. See if the problem changes or goes away. If this fixes or changes the problem, then check the springs and charge roll link arm assemblies for binds or defective parts. Replace as necessary. Check the charge roll for any signs of toner buildup or other contamination - Lexmark T520 | Service Manual - Page 125
changes from 0 V dc to +4 V dc If the voltage does not vary, check the continuity of line J10-8 in the front cable harness. If there is no continuity, replace the cable harness. If there is continuity, replace the HVPS. If this does not correct the problem, replace the engine board. Turn the printer - Lexmark T520 | Service Manual - Page 126
: Install a new print cartridge if available before doing this service check. Residual image can be caused by the photoconductor, cleaning blade and other parts inside the print cartridge. FRU 1 Hot Roll Fuser Assembly Action Check the fuser assembly for signs of toner contamination. The hot roll - Lexmark T520 | Service Manual - Page 127
Service Tip: This is generally caused by loose toner in the machine in the paper path being carried through the printer on the backside of the paper. FRU 1 Hot Roll Fuser Assembly 2 Transfer Roll Transfer Plate Assembly Action Toner is being carried out on the backside of the media. This problem - Lexmark T520 | Service Manual - Page 128
Cartridge" User Error Message, be sure a Lexmark 4520 print cartridge is correctly installed in the printer. The cartridge is easily identified by the contact board on the right side rear of the cartridge. Install another print cartridge before attempting to troubleshoot the printer. Check - Lexmark T520 | Service Manual - Page 129
1329048) and invoking the Serial Post Diagnostic Test. The test helps isolate the printer from the serial cable and host. The test provides failure information on the display for approximately three seconds. If the test indicates a problem, replace the controller board. Diagnostic Information 2-101 - Lexmark T520 | Service Manual - Page 130
+5 V dc with the controller board removed from the printer. If incorrect, replace the engine board. If correct, replace the toner sensor assembly. A bad ground connection between J10-13 on the engine board and pin 3 on the toner sensor results in a 929 service error. 2-102 Service Manual - Lexmark T520 | Service Manual - Page 131
transfer roll for damage, toner or foreign material buildup. Service Tip: The transfer roll assembly is part of the Maintenance Kit and is replaced when a '80 Scheduled Maintenance" message displays. Ask the customer if they have replaced the transfer roll recently. CAUTION: Make sure the printer is - Lexmark T520 | Service Manual - Page 132
the printer runs the print test. If the voltage is incorrect, check the continuity of line J10-3 in the front cable harness to the HVPS. If there is no continuity, replace the cable harness. If there is continuity, replace the HVPS. If the problem continues, replace the engine board. 2-104 Service - Lexmark T520 | Service Manual - Page 133
buttons when "Performing Self Test" displays on the operator panel. The tests display on the operator panel in the order shown: • Print Registration • Print Tests • Hardware Tests • Duplex Tests (If installed) • Input Tray Tests • Output Bin Tests • Base Sensor Test • Printer Setup • Error Log • EP - Lexmark T520 | Service Manual - Page 134
• "Quick Disk Test/Test Passed" message displays if the test passes and the power indicator turns on solid. • "Quick Disk Test/Test Failed" message displays if the test failed and the power indicator turns on solid. 2. Press Go, Return, or Stop to return to the Device Tests menu. 3-2 Service Manual - Lexmark T520 | Service Manual - Page 135
yyyyyy indicates the number of usable blocks. • "xxxx Bad Blocks/Replace Disk" message displays if more than 2000 bad blocks are detected. The disk cannot be recovered because too many bad blocks exist on the disk. 4. Press Go or Return/Stop to return to the Device Tests menu. Diagnostic Aids 3-3 - Lexmark T520 | Service Manual - Page 136
is running. • "Flash Test/Test Passed" message displays if the test passes and the power indicator turns on solid. • "Flash Test/Test Failed" message displays if the test fails and the power indicator turns on solid. 2. Press Go or Return/Stop to return to the Device Tests menu. 3-4 Service Manual - Lexmark T520 | Service Manual - Page 137
on and release the buttons once "Performing Self Test" displays. - Once the printer is idle, the emulation can be downloaded again. 4. Program the download emulation into the code overlay card assembly again. 5. If these steps do not resolve the problem, replace the code overlay card assembly and - Lexmark T520 | Service Manual - Page 138
. To run the Duplex Quick Test: 1. Select Duplex Quick Test from the menu. 2. Select Single or Continuous. • The single Duplex Quick test cannot be canceled. The printer attempts to print the Quick Test Page from the default paper source. If the default paper source only supports envelopes, then the - Lexmark T520 | Service Manual - Page 139
4520-xxx Duplex Sensor Test This test is used to determine whether or not the Duplex sensors and switches are working correctly. Select Sensor Test from the Duplex Tests menu. Manually actuate each of the duplex sensors. When the sensor/ switch is closed, CL (closed) displays, when the sensor/switch - Lexmark T520 | Service Manual - Page 140
4520-xxx Duplex Motor Test This test lets you test the duplex unit paper feed drive system, and verify that the power and velocity values are acceptable. To run the Duplex Motor Test: 1. Select Motor Test from the Duplex Tests menu. The duplex motor test continues to run until the printer is powered - Lexmark T520 | Service Manual - Page 141
through the printer. • "Duplex Feed 1/Clear Paper" message displays when the paper reaches paper stop position 1 and the power indicator turns on solid. Duplex Feed 2 Test This test feeds a blank sheet of paper to the duplex paper stop position 2. To run the Duplex Feed 2 Test: Select Duplex Feed - Lexmark T520 | Service Manual - Page 142
4520-xxx Error Log Viewing the Error Log The error log is helpful to the servicer by providing a history of printer errors. The error log contains the 12 most recent errors that have occurred on the printer. The most recent error displays in position 1 and the oldest error displays in position 12 ( - Lexmark T520 | Service Manual - Page 143
Serial 3 Wrap (if available) LCD Test To run the LCD Test: 1. Select LCD Test from the Diagnostic menu. The LCD test continually executes the LCD display test. 2. Press Return/Stop to cancel the test. Button Test To run the Button Test: 1. Select Button Test from the Diagnostic menu. With no buttons - Lexmark T520 | Service Manual - Page 144
99,999. Once the maximum pass count or fail count is reached, the test is stopped, the power indicator is turned on solid, and the final results display. If the test fails, the message SDRAM Error, displays for approximately three seconds and the failure count increases by 1. 3-12 Service Manual - Lexmark T520 | Service Manual - Page 145
used to check the validity of the controller board code and fonts. To run the ROM Memory Test: 1. Select ROM Memory Test from the menu. P and F represent the same numbers for DRAM. The power indicator blinks indicating the test is in process. The test runs continuously. 2. Press Return/Stop to exit - Lexmark T520 | Service Manual - Page 146
by 1, however if the test fails, a message displays for approximately three seconds and the Fail Count increases by 1. Once the maximum count is reached the test stops. The power indicator goes on solid and the final results display. 4. Press Return/Stop to exit the test. 3-14 Service Manual - Lexmark T520 | Service Manual - Page 147
Feed Test This test lets the servicer observe the paper path as media is feeding through the printer. A blank sheet of paper feeds through the printer as the laser turns off during this test. The only way to observe the paper path is to open the lower front door that is used to access the envelope - Lexmark T520 | Service Manual - Page 148
the sensor. 4. Press Return/Stop to exit the test. Base Sensor Test This test is used to determine if the sensors located inside the printer are working correctly. The following sensors can be checked: Toner Optical Sensor Input Sensor Output Sensor (Fuser Exit) Narrow Media Sensor Front Door Sensor - Lexmark T520 | Service Manual - Page 149
" from the registration screen. Press Go to print the test page. While printing the Quick Test Page the "Quick Test Printing" message displays. Once the Quick Test Page completes printing, the Registration screen displays again. Print the "Quick Test Page" on letter or A4 paper. Diagnostic Aids 3-17 - Lexmark T520 | Service Manual - Page 150
the servicer change the page count from the diagnostic menu. This is used whenever the engine board is replaced because this board contains the printer NVRAM Count The Permanent Page Count can only be viewed and cannot be changed. To view the Permanent Page Count: 1. Select Permanent Page Count from - Lexmark T520 | Service Manual - Page 151
is reset by the servicer after a "80 Scheduled Maintenance" message displays (300K copies) and a maintenance kit is installed. To view the Maintenance Page Count: 1. Select Maintenance Count Value from the Diagnostic menu. 2. Press Return to go to the previous menu. To reset the Maintenance Page - Lexmark T520 | Service Manual - Page 152
at the factory when the printer is manufactured, however it requires resetting whenever you replace the engine board and can be set a digit. Change each digit as required. When the last digit is changed, press Select to validate the Configuration ID. If the ID is invalid then "INVALID ID" message - Lexmark T520 | Service Manual - Page 153
problems with paper curl on low grade papers and or problems with letterheads on some types of media. The fuser temperature can be adjusted as follows: NORMAL, LOWER, LOWEST Warm Up Time You can change the amount of time the printer Charge Roll The charge roll can be adjusted to: LOW, MEDIUM, - Lexmark T520 | Service Manual - Page 154
the Print Test Page varies depending on the media installed in the selected input source. Note: The Print Test Page always prints on one side of the paper, regardless of the duplex setting or the presence of a duplex unit. If a source is selected that contains envelopes, an envelope test pattern is - Lexmark T520 | Service Manual - Page 155
the Print Quality Test pages. If you want more than one copy, perform these steps again. The following is printed: • Diagnostic EP Setup: - fuser temperature, warm up time, transfer, print contrast and charge roll settings. • Contents of the Diagnostic Error Log. • Printer configuration information - Lexmark T520 | Service Manual - Page 156
memory cards, optional input paper trays, envelope feeder, duplex unit, output bins, flash or disk. • Printer information such as serial number, page count, installed RAM, engine code level, RIP code level, envelope feeder code level, tray 1-5 code levels, output bin 1-3 code levels, operator panel - Lexmark T520 | Service Manual - Page 157
rolls. The friction between the pick roll and the paper produces a frictional locking condition. If the paper not to be considered an adjustment for feeding problems unless it is obvious that the pick normal forces. If the pick assembly is noisy, replacement may be required. The arm must pivot freely - Lexmark T520 | Service Manual - Page 158
have a system board. The option system board has a microprocessor that controls the option mechanism. A software architecture is provided that controls the option and communicates information such as paper path status, sensor status, motor status and so on to the base printer. 3-26 Service Manual - Lexmark T520 | Service Manual - Page 159
of an Opto triac to control the fuser lamp. The second part of the assembly is the fuser frame which contains the hot roll, backup roll, and associated parts as well as the paper exit guide assembly, narrow media sensor, fuser control board and the envelope conditioner solenoid. Diagnostic Aids 3-27 - Lexmark T520 | Service Manual - Page 160
flag. This error can display due to a problem with the HSYSC signal to or in the printhead. Use the sub error code table to assist in isolating a 200 paper jam message. Error Message 201 - Paper Jam - Remove Cartridge This message indicates the paper is jammed between the printer input and exit - Lexmark T520 | Service Manual - Page 161
tray x. Error Message 250 - Paper Jam - Check MP Feeder The paper is jammed in the multipurpose feeder and has not reached the base machine input sensor or has not reached the input sensor in time. Error Message 260 Paper Jam - Check Envelope Feeder An envelope is jammed in the envelope feeder or - Lexmark T520 | Service Manual - Page 162
4520-xxx 3-30 Service Manual - Lexmark T520 | Service Manual - Page 163
to ESD-sensitive parts, follow the instructions below in addition to all the usual precautions, such as turning off power before removing logic boards: • Keep the ESD-sensitive part in its original shipping container (a special "ESD bag") until you are ready to install the part into the machine - Lexmark T520 | Service Manual - Page 164
replace the duplex motor or loosen the motor or drive belt idler pulley. Service Tip: Excessive belt tension can result in stalling the duplex motor. Too little belt tension can result in belt slippage. To do the duplex to maintain the adjustment. 4. Reassemble the duplex unit. 4-2 Service Manual - Lexmark T520 | Service Manual - Page 165
Fuser Solenoid Adjustment Perform the fuser solenoid adjustment whenever you replace the fuser solenoid. Adjust the fuser solenoid while installed in the printer between sheets of paper as they are fed through the printer. This adjustment does not reduce the printer overall performance such as pages - Lexmark T520 | Service Manual - Page 166
replace the printhead assembly or loosen the mounting screws. Install printer on and release the buttons when "Performing Self Test" displays. 4. Select Registration from the menu. 5. Select Quick Test Page. The test page should only be printed on letter or A4 paper from Tray 1. The Quick Test Test - Lexmark T520 | Service Manual - Page 167
out far enough to allow the alignment assembly to be removed from the printer. It is not necessary to completely remove the screw. 4. Install the new alignment assembly. Turn the reference screw clockwise with a 7 mm nut driver until it touches the back of the reference plate and tighten the nut - Lexmark T520 | Service Manual - Page 168
xxx B. Print a copy of the Quick Test Page and check the margin adjustments printed on the test page. These settings should be within the the locknut. Turn the screw a few turns and print a copy of the Quick Test Page as you check the diamonds on the left margin. Continue adjusting the screw as you - Lexmark T520 | Service Manual - Page 169
necessary to service the printer. Each screw toner level sensor charge roll main drive gearbox EP module to left and right side frame developer drive assembly stacker duct to frame cartridge hold down assembly MPT deflector interconnect board shield ground engine board shield to frame laser - Lexmark T520 | Service Manual - Page 170
mounting 1 mounting 2 (front) integrated tray ITC board mounting 2 stacker support to right attach 2 side frame M3.5x12 mm engine board shield to attach 1 Thread Cutting left frame paper alignment assembly mounting 2 toner cartridge guide track mounting 2 left side frame to center - Lexmark T520 | Service Manual - Page 171
redrive deflector mounting 2 interconnect board to mounting 2 center pan engine board mounting 4 controller board to attach 2 interconnect board ground controller board to inner mounting 2 shield controller board (back) mounting 2 engine board to attach 1 interconnect shield - Lexmark T520 | Service Manual - Page 172
) Panhead M3x6 mm Taptite Panhead stacker duct controller to shield controller board in pan shield ground LVPS fuser cover cable clip outer shield INA cover mounting 1 mounting 2 mounting 2 mounting 2 attach 1 mounting 2 mounting 2 mounting 2 mounting 6 mounting 4 4-10 Service Manual - Lexmark T520 | Service Manual - Page 173
mounting 1 Plastite Thread Forming right side frame to pan attach 3 left side frame to pan attach 1 M3x6 mm SEMS Machine Screw with washer fuser board ground cable mounting 1 M3.5x12 mm printhead to EP frame mounting 3 Plastite Thread Forming with washer Repair Information 4-11 - Lexmark T520 | Service Manual - Page 174
. Make sure your fingers are not under the printer when you lift or set the printer down. Note: Some removal procedures require removing cable ties. You must replace cable ties during reassembly to avoid pinching wires, obstructing the paper path, or restricting mechanical movement. Covers Removals - Lexmark T520 | Service Manual - Page 175
4520-xxx Right Cover Removal 1. Open the upper and bottom front covers. 2. Release the cover latch (A) and remove the right cover mounting screw (B). Repair Information 4-13 - Lexmark T520 | Service Manual - Page 176
4520-xxx 3. Remove the redrive assembly. 4. Remove the right side cover mounting screw (B). 5. Remove the right side cover. 4-14 Service Manual - Lexmark T520 | Service Manual - Page 177
slots and remove the cover. Note: When removing the cover, hold the upper and lower latch and spring to prevent them from falling into the printer. Repair Information 4-15 - Lexmark T520 | Service Manual - Page 178
the fuser wiper cover latch and remove the cover. 5. Remove the paper full sensor flag assembly from the mounting bracket. 6. Remove the mounting screws (A) and remove the cover. Center Pan Assembly Removal 1. Remove the left and right side frames. 2. Remove the pan assembly. 4-16 Service Manual - Lexmark T520 | Service Manual - Page 179
1. Remove the inner EMC shield. 2. Remove the controller board mounting screws (A). 3. Remove the controller board parallel port mounting screws, if installed. 4. Remove the USB port mounting screws (C), if present. 5. Remove the serial port mounting screws if present. 6. Remove the controller - Lexmark T520 | Service Manual - Page 180
developer drive assembly. Note: Be sure the developer drive assembly wheel aligns with the hub on the main drive assembly when reinstalling the assembly. 4-18 Service Manual - Lexmark T520 | Service Manual - Page 181
and connectors. 4. Remove the two duplex board mounting screws and remove the duplex board. Duplex Front Cover Assembly Removal 1. Lift the base printer from the duplex assembly. 2. Remove the four duplex board cover mounting screws and disconnect the duplex cover door switch cable at connector J6 - Lexmark T520 | Service Manual - Page 182
: Pay attention to cable routing to avoid pinching or cutting wires during reassembly. Ensure cables are securely placed into the cable retaining tabs. Adjust the "Duplex Motor Drive Belts" on page 4-2 whenever you remove or replace the duplex motor. 4-20 Service Manual - Lexmark T520 | Service Manual - Page 183
EMC Shields Removals Inner EMC Shield Removal 1. Remove the left door. 2. Remove the outer EMC shield. 3. Remove all option boards from the connector board slots. 4. Remove the inner EMC shield mounting screws (A). 5. Remove the ground screw (B). 6. Remove the inner EMC shield. Repair Information - Lexmark T520 | Service Manual - Page 184
4520-xxx Outer EMC Shield Removal 1. Remove the left door. 2. Loosen the outer EMC shield mounting screws (A) and remove the shield. 4-22 Service Manual - Lexmark T520 | Service Manual - Page 185
the engine board. 3. Remove the engine board mounting screws (A). 4. Remove the engine board shield mounting screw (B) from the main drive motor assembly. 5. Remove the engine board. Note: Anytime the engine board is replaced, the Configuration ID must be reset in NVRAM on the new engine board. Go - Lexmark T520 | Service Manual - Page 186
4520-xxx Main Fan Removal 1. Remove the top rear cover. 2. Remove the inner EMC shield. 3. Note the routing of the main fan cable (A) and disconnect the cable from the engine board at connector J1. 4. Release the four latches (B) and remove the fan from the left side frame. 4-24 Service Manual - Lexmark T520 | Service Manual - Page 187
EP frame assembly. Left Side Frame Removal 1. Remove the engine board. 2. Remove the main drive assembly. 3. Remove the upper front cover hinge assembly. 4. Remove the multipurpose tray/lower deflector assembly. 5. Remove the paper alignment assembly. 6. Remove the left side frame mounting screws - Lexmark T520 | Service Manual - Page 188
4520-xxx 7. Place the printer on its back and remove the left side frame mounting screws (A). 8. Remove the left side frame. 4-26 Service Manual - Lexmark T520 | Service Manual - Page 189
screw (A), disconnect the sensor cable and remove the toner sensor. 6. Remove the right side frame mounting screws (B) and remove the right side frame. 7. Remove the smart cartridge contact assembly mounting screw (C). CAUTION: Be sure the fuser assembly has cooled before working on any of the - Lexmark T520 | Service Manual - Page 190
4520-xxx Fuser Removal 1. Remove the redrive assembly. 2. Remove the ground screw (B). 3. Remove the fuser mounting screws (A). 4. Disconnect the AC fuser lamp connector from the LVPS. 5. Disconnect the DC fuser cable from the engine board. 6. Remove the fuser. 4-28 Service Manual - Lexmark T520 | Service Manual - Page 191
4520-xxx Fuser Board Removal 1. Remove the fuser assembly. 2. Disconnect the cables (A) from the fuser board. 3. Remove the fuser board mounting screws (B). 4. Lift the fuser board from the fuser assembly. Repair Information 4-29 - Lexmark T520 | Service Manual - Page 192
cover. 4. Remove the two screws (A) from the right side fuser lamp contact cover. 5. Remove screw (B) that attaches the fuser lamp contact to the fuser cover, on each end of the cover. 6. Detent the latch (C), and remove the cover. 7. Detent the latch (C), and remove the cover. 4-30 Service Manual - Lexmark T520 | Service Manual - Page 193
4520-xxx CAUTION: Take care when removing the screw, as the lamp is under pressure. When the contact is released, damage to the lamp or contact may occur. Repair Information 4-31 - Lexmark T520 | Service Manual - Page 194
the fuser lamp. Use care when handling the lamp. 4. Disengage the hot roll bearing clips to free the fuser frame walls. 5. Gently apply outward pressure on the left and right fuser side frames to release the detack housing assembly. Fuser Transfer Plate Removal 1. Remove the upper paper deflector - Lexmark T520 | Service Manual - Page 195
the solenoid cable from the fuser board. 3. Remove the solenoid mounting screw (A). 4. Disconnect the solenoid link (B). 5. Remove the solenoid from the fuser assembly. Note: Perform the "Fuser Solenoid Adjustment" on page 4-3 whenever you replace the fuser solenoid. Repair Information 4-33 - Lexmark T520 | Service Manual - Page 196
the flag opening, in the lower exit guide assembly, and snap the sensor into place. Be sure the sensor operates correctly. 6. Replace the cable tie on the cable bundle. Fuser Exit Sensor Flag Assembly Removal 1. Cut the cable tie from the fuser board cable bundle. 2. Disconnect the exit sensor from - Lexmark T520 | Service Manual - Page 197
and install the correct lamp. Description Fuser Lamp 115V 630W Fuser Lamp 220V 630W Fuser Lower Exit Guide Assembly Removal 1. Remove the fuser assembly. 2. Remove the fuser cover assembly. 3. Remove the fuser detack housing assembly. 4. Disconnect the sensors from the fuser board. 5. Gently - Lexmark T520 | Service Manual - Page 198
Removal 1. Remove the inner paper deflector. 2. Remove the toner sensor cable from the retainer (A) on the front of the HVPS. 3. Remove the right side cover. 4. Disconnect the HVPS cable from the HVPS at connector (C). 5. Disconnect the transfer roll cable from the HVPS board. Warning: Use care when - Lexmark T520 | Service Manual - Page 199
4520-xxx Integrated Tray Compensator Assembly Removal 1. Remove the paper tray. 2. Remove the left door. 3. Remove the inner EMC shield. 4. Disconnect the compensator motor cable (A) from the engine board. 5. Place the printer on its side. 6. Locate the integrated tray compensator assembly (B) on - Lexmark T520 | Service Manual - Page 200
Pick Roll Assembly Removal 1. Remove the paper tray. 2. Place the printer on its side. 3. Locate the compensator assembly on the bottom of the printer and pull the compensator arm away from the printer. 4. Unsnap the pick roll assembly (D) from its mounting and remove. 4-38 Service Manual - Lexmark T520 | Service Manual - Page 201
1. Remove the inner EMC shield. 2. Remove the engine board and shield. 3. Remove the LVPS. 4. Disconnect all cables from the interconnect board. Go to "Interconnect Board" on page 5-14 to identify the correct jumper locations for your printer. 5. Place the printer on its back and remove the mounting - Lexmark T520 | Service Manual - Page 202
4520-xxx Low Voltage Power Supply Removal 1. Remove the right cover. 2. Remove the LVPS mounting screws (A) from the rear of the bottom pan. 3. Pull the LVPS assembly from the right side of the printer. 4-40 Service Manual - Lexmark T520 | Service Manual - Page 203
4520-xxx 4. Press the release latch on the fuser lamp cable connector (B) and disconnect from the LVPS. 5. Remove the fuser assembly. Repair Information 4-41 - Lexmark T520 | Service Manual - Page 204
4520-xxx 6. Disconnect the interconnect card cable from the LVPS (C). 7. Remove the LVPS. 4-42 Service Manual - Lexmark T520 | Service Manual - Page 205
drive assembly. 4. Remove the transfer shaft (A) through the bottom of the printer. 5. Remove all cables from the cable clamps (B) on the main drive assembly. 6. Remove the ground screw (C), and remove the engine board shield. 7. Remove the main drive assembly mounting screws (D). 8. Remove the link - Lexmark T520 | Service Manual - Page 206
4520-xxx Main Drive Motor Removal 1. Remove the main drive assembly. 2. Remove the main drive motor mounting screws (A). 3. Remove the main drive motor. 4-44 Service Manual - Lexmark T520 | Service Manual - Page 207
4520-xxx Multipurpose Tray/Lower Deflector Assembly Removal 1. Open the multipurpose tray to a position that allows the left and right tray hinge slots (A) to align with the rectangular mounting posts (B). Pull upward on each tray hinge to remove the tray from the two mounting posts. Warning: Be - Lexmark T520 | Service Manual - Page 208
4520-xxx 2. Remove the upper deflector. 3. Remove the solenoid mounting screw. 4. Remove the screws (A) mounting the multipurpose tray/lower deflector assembly. 5. Remove the multipurpose tray/lower deflector assembly. 4-46 Service Manual - Lexmark T520 | Service Manual - Page 209
4520-xxx Operator Panel Assembly Removal 1. Remove the upper front cover. 2. Gently press the operator panel lens tab (A) to loosen the operator panel. 3. Disconnect the operator panel cable and remove the operator panel. Repair Information 4-47 - Lexmark T520 | Service Manual - Page 210
the operator panel into the upper front cover. 7. Be sure the toroid is on the opposite end of the cables near the engine board connectors. 8. Route the cables through the printer and down the inside of the engine board shield. 9. Plug the cables into the engine board connectors. 4-48 Service Manual - Lexmark T520 | Service Manual - Page 211
the sensor slot on the paper tray board. Paper Tray Paper Out Sensor Flag Removal 1. Remove the paper tray frame assembly. 2. Remove the paper tray board. 3. Remove the paper out sensor flag. Paper Size Spring Comb Removal 1. Remove the paper tray board. 2. Remove the paper size spring comb mounting - Lexmark T520 | Service Manual - Page 212
-xxx Paper Alignment Assembly Removal 1. Remove the upper paper deflector assembly. 2. Remove the inner paper deflector assembly. 3. Release the input paper sensor from its mounting and remove. 4. Remove the left door. 5. Remove the paper alignment assembly mounting screws (A). 4-50 Service Manual - Lexmark T520 | Service Manual - Page 213
4520-xxx 6. Locate the paper alignment assembly reference adjustment screw (B) through the left frame and remove the screw. 7. Remove the paper alignment assembly. Note: Do the "Paper Alignment Assembly Adjustment" on page 4-5 when you reinstall the assembly. Repair Information 4-51 - Lexmark T520 | Service Manual - Page 214
. Upper Paper Deflector Assembly Removal 1. Open the multipurpose tray and remove the tray from the two mounting posts. 2. Gently release the upper deflector assembly latch from its mounting on the right side frame and slide to the right. 3. Remove the upper deflector assembly. 4-52 Service Manual - Lexmark T520 | Service Manual - Page 215
. 3. Release the input paper sensor from its mounting and remove. Paper Size Sensing Board Removal 1. Disconnect the paper size sensing board cable from the board. 2. Remove the two paper size sensing board mounting screws (A). 3. Remove the paper size sensing board. Pick Roll Removal 1. Remove the - Lexmark T520 | Service Manual - Page 216
(A) from the printhead assembly. 3. Remove the printhead mounting screws (B) and remove the printhead. Note: Do the "Printhead Assembly Adjustment" on page 4-4 whenever you remove or replace the printhead assembly or loosen the mounting screws. 4-54 Service Manual - Lexmark T520 | Service Manual - Page 217
4520-xxx Redrive Assembly Removal 1. Remove the redrive door assembly. 2. Remove the redrive exit cover. 3. Remove the redrive assembly mounting screws (A). 4. Release the redrive assembly mounting latches (B) and remove the redrive assembly. Repair Information 4-55 - Lexmark T520 | Service Manual - Page 218
Disconnect smart cartridge cable. 2. Remove print cartridge. 3. Remove transfer plate. 4. Unlatch smart cartridge contact assembly (A) from the right frame assembly. 5. Remove smart cartridge contact (B). 6. Disconnect the smart contact assembly cable (C) from the engine board. 4-56 Service Manual - Lexmark T520 | Service Manual - Page 219
4520-xxx Toner Sensor Removal 1. Remove the right side cover. 2. Remove the toner sensor mounting screw (A). Disconnect the toner sensor cable and remove the toner sensor. Repair Information 4-57 - Lexmark T520 | Service Manual - Page 220
Removal 1. Open the upper front cover and remove the print cartridge. 2. Unsnap the transfer roll assembly from the left pivot arm. 3. Lift the transfer roll assembly toward the left and remove it from the printer. Upper Paper Deflector Assembly Removal 1. Open the multipurpose tray and remove the - Lexmark T520 | Service Manual - Page 221
4520-xxx Upper Front Cover Hinge Assembly Removal 1. Remove the upper front cover. 2. Remove the laser assembly cover. 3. Remove the C-clips (A) from the upper front cover hinge assembly left and right hinge pins and remove the pins. Note the pin orientation - Lexmark T520 | Service Manual - Page 222
shield. 4. Remove the mounting screw (A) and remove the switch assembly. 5. Note the routing of the interlock switch assembly cable and disconnect the cable on the engine board. 4-60 Service Manual - Lexmark T520 | Service Manual - Page 223
4520-xxx 5. Connector Locations Low Voltage Power Supply Connector CN3 Interconnect Board Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Signal +5 V dc +5 V dc Ground Ground Ground Ground +24 V dc +24 V dc Heat on +5 V dc +5 V - Lexmark T520 | Service Manual - Page 224
4520-xxx 5-2 Service Manual - Lexmark T520 | Service Manual - Page 225
4520-xxx High Voltage Power Supply Connector CN1 Engine Board Pin No. 1 2 3 4 5 6 7 8 Signal Developer PWM +24 V dc Return Charge PWM +24 V dc IN TX PWM TX Enable TX CUR PWM SVRO OUT Connector Locations 5-3 - Lexmark T520 | Service Manual - Page 226
4520-xxx Engine Board Connector J1 Main Fan J3 Printhead (Mirror Motor) J4 Cover Closed Switch J5 Printhead Pin No. 1 2 3 1 2 3 4 5 6 7 1 2 3 1 2 3 4 5 6 7 8 9 Signal 24 V dc Return +24 V dc Cover Closed Ground +5 V dc Ground Video* Ground +5 Phead LPOW Ground LADJ* LFB LENA* 5-4 Service Manual - Lexmark T520 | Service Manual - Page 227
J8 Printhead HYSNC J10 Cartridge/Sensor/Input Sensor/HVPS Pin No. 1 2 3 4 1 2 3 4 1 2 3 4 5 6 7 8 9 10 11 12 13 Signal HOPFULL* Ground Opt2 Ground +5 V dc HsyncID Hsyncin Ground AT Servo (HVPS) Servo OutT (HVPS) TXENABLE (HVPS) Transfer (HVPS) +24 V dc (HVPS) Charge (HVPS) Ground (HVPS) Developer - Lexmark T520 | Service Manual - Page 228
4520-xxx Connector J11 Operator Panel J12 Transport Motor J14 Autoconnect (Options) Pin No. 1 2 3 4 5 1 2 4 5 6 7 8 9 10 11 1 2 3 4 Signal FPIRQ Ground I2CCLK +5 V dc I2CDATA ON/OFF Ground +5 V dc MTR1 Dir MTR4 MTR3 +24 V RET +24 V RET +24 V dc RXDIN Ground TxBR Ground 5-6 Service Manual - Lexmark T520 | Service Manual - Page 229
Pin No. J15 Integrated Paper Tray - Paper 1 Size Sensor 2 3 4 5 6 7 8 9 10 J16 Fuser 1 2 3 4 5 6 7 8 J17 MPT Pick 1 2 J18A Auto Compensator 1 2 J18B Auto Compensator 1 2 3 Signal +5 V dc PSIZE2 Ground PSIZE1 +24 V dc Ground POUT +5 V dc Paper Low +5 V dc Narmedia - Lexmark T520 | Service Manual - Page 230
4520-xxx Connector J19 MPT Paper Out J22 Smart Contact Pin No. 1 2 3 1 2 3 Signal MPFSENSE Ground MPFLED Scart 5 V Ground Ground 5-8 Service Manual - Lexmark T520 | Service Manual - Page 231
4520-xxx Engine Board Connector Locations 5-9 - Lexmark T520 | Service Manual - Page 232
4520-xxx Controller Board - Non Network 5-10 Service Manual - Lexmark T520 | Service Manual - Page 233
4520-xxx Controller Board - Network Connector Locations 5-11 - Lexmark T520 | Service Manual - Page 234
4520-xxx Fuser Board Connector J1 Engine Board J2 Thermistor J3 Thumper J4 Thumper Solenoid J5 Narrow Media Sensor Pin No. Signal 1 NarMedia 2 ThermGnd 3 8 ExitSns* 1 ThermGnd 2 HRTherm 1 Ground 2 +42 V dc 1 ThumpB 2 ThumpA 1 +5 V dc 2 Nar Media 3 Ground 5-12 Service Manual - Lexmark T520 | Service Manual - Page 235
4520-xxx Connector Locations 5-13 - Lexmark T520 | Service Manual - Page 236
Connector J2 LVPS J3 LVPS J5 Autoconnect BTM/FNT J6 Engine Board J7 Controller Board J11 INA 1 J12 INA 2 5-14 Service Manual Pin No. 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 1 2 1 1 1 1 Signal +42 V dc Heaton Xeroxing +24 V dc +24 V dc +24 V dc Ground Ground Ground Ground Ground Ground Ground Ground - Lexmark T520 | Service Manual - Page 237
4520-xxx 210/220 001/002 Connector Locations 5-15 - Lexmark T520 | Service Manual - Page 238
Envelope Feeder Board Connector J1 J2 J3 J4 Pin No. 1 2 3 4 5 6 7 1 2 3 1 2 3 1 2 3 4 Signal N/A Ground Tx (EOC) Ground Rx (EOC) +24 V dc Return +24 V dc Ground Paper Present +5 V dc Ground Paper Present +5 V dc Motor - Phase BMotor - Phase AMotor - Phase B+ Motor - Phase A+ 5-16 Service Manual - Lexmark T520 | Service Manual - Page 239
4520-xxx Connector Locations 5-17 - Lexmark T520 | Service Manual - Page 240
xxx Duplex Unit Board Note: Duplex connectors J10 and J11 are interchangeable. No problem results if the connectors are switched. Connector J1 Motor J2 DC Motor Sensor/Encoder Board J3 Stepper Motor J4 Fan J5 Paper Input Sensor J6 Rear Cover Open Switch J7 Jam Removal Tray Open Switch J8 Paper Exit - Lexmark T520 | Service Manual - Page 241
4520-xxx Connector J9 Autoconnect, Option Below J10 Autoconnect, Option Below J11 Printer Autoconnect J12 Printer Autoconnect Pin No. 1 2 3 4 1 2 1 2 1 2 3 4 5 Signal Ground PrtxDout Ground PrtRxd +24 V dc Ground +24 V dc Ground N/A Ground PrtxDin Ground PrtRxD Connector Locations 5-19 - Lexmark T520 | Service Manual - Page 242
4520-xxx 5-20 Service Manual - Lexmark T520 | Service Manual - Page 243
4520-xxx 6. Preventive Maintenance This chapter describes procedures for printer preventive maintenance. Following these recommendations can help prevent problems and maintain optimum performance. Safety Inspection Guide The purpose of this inspection guide is to aid you in identifying unsafe - Lexmark T520 | Service Manual - Page 244
the message "80 Scheduled Maintenance" at each 250K page count interval. It is necessary to replace the fuser assembly, transfer roller and charge roll at this interval to maintain the print quality and reliability of the printer. The parts are available as a maintenance kit with the following - Lexmark T520 | Service Manual - Page 245
Catalog • SIMILAR ASSEMBLIES: If two assemblies contain a majority of identical parts, they are shown on the same list. Common parts are shown by one index number. Parts peculiar to one or the other of the assemblies are listed separately and identified by description. • NS: (Not Shown) in the Asm - Lexmark T520 | Service Manual - Page 246
4520-xxx Assembly 1: Covers 7-2 Service Manual - Lexmark T520 | Service Manual - Page 247
1 Cover, Left Door 001/002 1-slot 1 Cover, Left Door 210/220 2-slot 1 Support, Paper 1 Cable Tie 1 Retainer, Cable 5 Parts Packet, Screw (Left Side Cover Mounting) 3 Parts Packet, Screw (Right Side Cover Mounting) 6 Parts Packet, Screw (Laser Cover) 5 Parts Packet, Screw (Upper Front Cover Mounting - Lexmark T520 | Service Manual - Page 248
4520-xxx Assembly 2: Frame 7-4 Service Manual - Lexmark T520 | Service Manual - Page 249
210/220 1 Spring, Tray Bias 1 Parts Packet, Contact Kit • Contact, Dr Blade/TAR/Developer Roll (3) • Contact, PC Drum (1) • Contact, Charge Roll (1) • Block, Contact Mounting (4) • Screw, Contact Mounting (5) 1 Sensor, Toner Cartridge Level 2 Roller, Developer Support 1 Tray Bias Arm Assembly 1 Pan - Lexmark T520 | Service Manual - Page 250
4520-xxx Assembly 2: Frame (continued) 7-6 Service Manual - Lexmark T520 | Service Manual - Page 251
1 Left Side Frame 1 Board, Input Tray (ITC) 1 Guard, Gear 1 Pan, Motor Drip 1 Link, Gear Release 1 Spring, Counterbalance 17 Parts Packet, Screw 1 Spring, Cartridge Load 1 Shield, Gear 1 Contact, LSF Ground 1 Contact, RSF Ground 4 Nut Plate, Frame 210/220 1 Spring, Duplex Ground Parts Catalog 7-7 - Lexmark T520 | Service Manual - Page 252
4520-xxx Assembly 3: Printhead 7-8 Service Manual - Lexmark T520 | Service Manual - Page 253
4520-xxx AsmIndex 3 - 1 NS Part Number 99A2026 99A0263 Units Description 1 Printhead Assembly (Includes All Cables) 3 Parts Packet, Screw (Printhead Mounting) Parts Catalog 7-9 - Lexmark T520 | Service Manual - Page 254
4520-xxx Assembly 4: Paper Feed (Autocompensator) 7-10 Service Manual - Lexmark T520 | Service Manual - Page 255
1 Sensor, Paper Out Internal Tray 1 Pick Arm Assembly (500) 210/220 1 Pick Arm Assembly (250) 001/002 2 Pick Rolls 1 Flag, Paper Out 500 Tray 1 Flag, Paper Out 250 Tray 001/002 1 Spring, Bellcrank Internal 250 1 Spring, Bellcrank Internal 500 1 Parts Packet, Screw (Hanger) Parts Catalog 7-11 - Lexmark T520 | Service Manual - Page 256
4520-xxx Assembly 5: Paper Feed - Multipurpose Unit 7-12 Service Manual - Lexmark T520 | Service Manual - Page 257
8 mm) 2 Parts Packet, Screw (Lower Deflector Mounting 12 mm) 1 Flag, MPT Paper Out 1 Plate Assembly, MPT 1 Sensor, MPT Paper Out 2 Screw, Damper 1 Parts Packet, Screw (Frame Mounting) 1 Solenoid Assembly, MPT 2 Bushing, Pick Roll Shaft 2 Parts Packet, Clip (Pick Roll Shaft) Parts Catalog 7-13 - Lexmark T520 | Service Manual - Page 258
4520-xxx Assembly 6: Paper Feed - Alignment 7-14 Service Manual - Lexmark T520 | Service Manual - Page 259
99A2066 99A0492 99A0565 99A0566 99A0263 Units Description 1 Alignment Assembly Paper Feed 3 Parts Packet, Screw (Paper Feed) 1 Clip, Reference Ground 1 Screw, Paper Reference Adjustment 1 Washer, Reference Adjustment 1 Nut, Paper Reference Adjustment 2 Parts Packet, Screw (Alignment Asm Mounting - Lexmark T520 | Service Manual - Page 260
4520-xxx Assembly 7: Paper Feed - Output 7-16 Service Manual - Lexmark T520 | Service Manual - Page 261
4520-xxx AsmIndex 7 - 1 Part Number 99A2029 1 99A2151 2 99A1644 NS 99A0104 NS 99A1857 NS 99A0263 Units Description 1 Redrive Assembly, /250 Output 001/ 002 1 Door Assembly, Redrive 250 1 Spring, Upper Diverter 1 Deflector, Upper Redrive 2 Parts Packet, Screw (Duplex Path) Parts Catalog 7-17 - Lexmark T520 | Service Manual - Page 262
4520-xxx Assembly 8: Integrated Paper Tray - 500 Sheet 7-18 Service Manual - Lexmark T520 | Service Manual - Page 263
-xxx AsmIndex 8 - 1 2 3 4 5 6 7 8 9 10 11 Part Number 99A1601 99A1576 99A1895 99A0292 99A1812 99A1583 99A0126 99A0124 99A1582 99A0120 99A2093 Units Description 1 Latch 500 Tray Wear 3 Finger, Autosize 1 Plate, Snap-in 1 Slider, Autosize 500 2 Pad, Restraint 1 Restraint, Back Parts Catalog 7-19 - Lexmark T520 | Service Manual - Page 264
4520-xxx Assembly 9: Main Drive 7-20 Service Manual - Lexmark T520 | Service Manual - Page 265
99A2080 99A0263 99A0263 99A0260 Units Description 1 Gearbox, w/Motor 1 Shaft, Power Takeoff 250 1 Shaft, Power Takeoff 500 1 Spring, Power Takeoff Shaft 1 Gear, Bevel with Grease Packet 4 Parts Packet, Screw (Gearbox Mounting) 3 Parts Packet, Screw (Motor Mounting) 2 Clip, Cable - Lexmark T520 | Service Manual - Page 266
4520-xxx Assembly 10: Developer Drive 7-22 Service Manual - Lexmark T520 | Service Manual - Page 267
4520-xxx AsmIndex 10 - 1 2 Part Number 99A1544 99A2081 3 99A0263 Units Description 1 Developer Drive Assembly 1 Parts Packet, Developer Drive Shaft, Coupler Gear #55 3 Parts Packet, Screw (Developer Drive Ground) Parts Catalog 7-23 - Lexmark T520 | Service Manual - Page 268
4520-xxx Assembly 11: Hot Roll Fuser 7-24 Service Manual - Lexmark T520 | Service Manual - Page 269
L & R Fuser Lamp Contact Assemblies, W/ Fuser Cover Control Card 4 Parts Packet, Screws: • Contact Assembly (4) • Solenoid Mounting (1) • Board Cover Mounting(1) • Fuser Cover Assembly (4) • Hanger (7) 1 Gear, Upper Redrive 1 Housing, Detack Assembly 1 Hot Roll 1 Backup Roll 1 Envelop Conditioner - Lexmark T520 | Service Manual - Page 270
4520-xxx Assembly 12: Transfer 7-26 Service Manual - Lexmark T520 | Service Manual - Page 271
99A0349 99A0184 99A0185 99A0181 99A1578 99A0267 Units Description 1 Transfer Roll Assembly 1 Arm, Transfer Roll Assembly Right 1 Spring, Transfer Roll Right 1 Shaft, Transfer Pivot 1 Spring, Transfer Roll Left 1 Arm, Transfer Roll Left 1 Parts Packet, Retainer (Pivot Shaft) Parts Catalog 7-27 - Lexmark T520 | Service Manual - Page 272
4520-xxx Assembly 13: Charging 7-28 Service Manual - Lexmark T520 | Service Manual - Page 273
4520-xxx AsmIndex 13 - 1 2 3 4 NS Part Number 99A0512 99A0513 99A1017 99A1555 99A0263 Units Description 1 Link Assembly, Charge Left Kit 1 Link Assembly, Charge Right Kit 1 Roll Assembly, Charge 1 Bushing, Charge Roll 1 Parts Packet, Screw (Charge Roll) Parts Catalog 7-29 - Lexmark T520 | Service Manual - Page 274
4520-xxx Assembly 14: Electronics 1 7-30 Service Manual - Lexmark T520 | Service Manual - Page 275
4520-xxx AsmIndex 14 - 1 Part Number 1342514 1 1339535 1 1339538 1 1342536 1 1339537 1 1339539 1 1339540 1 1339541 1 1339546 1 1342534 1 1339543 1 1339542 1 1374067 1 1339544 1 1339545 for 220 V ac LVPS 6.3 a 1 Fuse, for 220 V ac LVPS 3.15 a 1 LVPS, 110 V ac 1 LVPS, 220 V ac Parts Catalog 7-31 - Lexmark T520 | Service Manual - Page 276
4520-xxx Assembly 14: Electronics I (continued) 7-32 Service Manual - Lexmark T520 | Service Manual - Page 277
8 99A2528 9 99A0426 10 56P0188 10 56P0189 10 56P0190 10 56P0191 Units Description 1 Parts Packet, Screw(s): • Controller Board Mtg (2) • Controller Board Mtg Front (2) • Controller Mtg Ground (1) • Engine Board Mtg (6) • Engine Board Mtg Top (2) • HVPS Mtg • INA Cover Mtg (12) • Interconnect - Lexmark T520 | Service Manual - Page 278
4520-xxx Assembly 15: Electronics II 7-34 Service Manual - Lexmark T520 | Service Manual - Page 279
Number 99A0263 99A2084 99A2049 99A2156 99A2094 99A2095 99A0263 99A0263 99A0408 99A1611 99A0227 99A0347 Units Description 6 Parts Packet, Screw (INA Cover Mounting) 1 Engine Board Shield Assembly 1 Shield, Inner Assembly, 2 Slot 210/220 1 Shield, Inner Assembly, 1 Slot 001/002 1 Shield, Outer 2 Slot - Lexmark T520 | Service Manual - Page 280
4520-xxx Assembly 16: Electronics III 7-36 Service Manual - Lexmark T520 | Service Manual - Page 281
99A2046 99A2052 99A2054 99A2042 56P1049 Units Description 1 Fan, Main 1 Gearbox, w/Motor 1 Board, Input Tray (ITC) 1 Cable, Auto Connect Bottom 1 Interconnect Board Assembly 1 Cable, Integrated Tray 1 Cable, Main Drive Motor 1 Engine Board Assembly 1 Sensor, Standard Bin Level Parts Catalog 7-37 - Lexmark T520 | Service Manual - Page 282
4520-xxx Assembly 17: Electronics IV 7-38 Service Manual - Lexmark T520 | Service Manual - Page 283
17 - 1 1 2 Part Number 99A2014 99A2015 99A2060 Paper Out 1 Pick Arm Assembly (500) 210/220 1 Pick Arm Assembly (250) 001/002 1 MPT Solenoid 1 Engine Board Assembly 1 Cable, Front Harness 1 Power Supply, High Voltage 1 Smart Contact Assembly 1 Sensor, Toner Cartridge Level 1 Cable, Deflector Parts - Lexmark T520 | Service Manual - Page 284
4520-xxx Assembly 18: Electronics V 7-40 Service Manual - Lexmark T520 | Service Manual - Page 285
1 Cable, Laser 1 Engine Board Assembly 1 Interconnect Board Assembly 1 Solenoid Assembly, Envelope Conditioner 1 Fuser Board Assembly 1 Sensor, Exit 1 Cover, Fuser Assembly with Thermistor 1 Cable, Engine Board to Fuser Board 1 Sensor, Narrow Media 1 Cable, Fuser AC Fuser to LVPS Parts Catalog 7-41 - Lexmark T520 | Service Manual - Page 286
4520-xxx Assembly 19: Electronics VI 7-42 Service Manual - Lexmark T520 | Service Manual - Page 287
1 Cable, Laser 1 Engine Board Assembly 1 Interconnect Board Assembly 1 Solenoid Assembly, Envelope Conditioner 1 Fuser Board Assembly 1 Sensor, Exit 1 Cover, Fuser Assembly with Thermistor 1 Cable, Engine Board to Fuser Board 1 Sensor, Narrow Media 1 Cable, Fuser AC Fuser to LVPS Parts Catalog 7-43 - Lexmark T520 | Service Manual - Page 288
4520-xxx Assembly 20: 250-Sheet Tray 7-44 Service Manual - Lexmark T520 | Service Manual - Page 289
Board) 1 Board, Option Tray 1 Jumper, pin 1 Parts Packet, Screw (Switch Spring) 1 Spring, Switch Activate 1 Stud Assembly, 250 Frame 1 Arm, Paper Out 250 3 Parts Packet, Screw (Auto Comp Mounting) 1 Pick Arm Assembly 1 Wear Plate, Pass Thru 250 Tray 2 Parts Packet, Screw (Wear Plate Mounting) 1 Roll - Lexmark T520 | Service Manual - Page 290
4520-xxx Assembly 20: 250-Sheet Tray (continued) 7-46 Service Manual - Lexmark T520 | Service Manual - Page 291
Option Number 1 Clip, 250 Tray Wear 4 Finger, Autosize 1 Plate, Snap-In 1 Label, Paper Size 1 Knob, Paper Size 1 Restraint, Back 250 Sheet Tray 1 Slider, Autosize 250 1 Spring, Backup Roller 1 Spring, Bellcrank 250 Tray Option 2 Bushing, Drive Roll 1 Bellcrank, Roller Release Parts Catalog 7-47 - Lexmark T520 | Service Manual - Page 292
4520-xxx Assembly 21: Integrated Paper Tray - 250 Sheet 7-48 Service Manual - Lexmark T520 | Service Manual - Page 293
-xxx AsmIndex 21 - 1 2 3 4 5 6 7 8 9 10 11 Part Number 99A1536 99A2160 99A1894 99A0119 99A1812 99A0121 99A0126 99A0124 99A0127 99A0120 99A1601 Units Description 1 Tray Tray Wear 4 Finger, Autosize 1 Plate, Snap-In 1 Slider, Autosize 250 2 Restraint Pad 1 Latch, Back Restraint Parts Catalog 7-49 - Lexmark T520 | Service Manual - Page 294
4520-xxx Assembly 22: 500-Sheet Tray 7-50 Service Manual - Lexmark T520 | Service Manual - Page 295
Paper Low 3 Parts Packet, Screw (Auto Comp Mounting) 1 Pick Arm Assembly 2 Pick Roll Paper Size 1 Slider, Autosize 500 2 Restraint Pad 1 Tray Assembly, 500 Sheet 1 Knob, Paper Size 1 Restraint, Back 500-Sheet Tray 1 Latch, Back Restraint 1 Label, Options 1 Board, Tray 1 Shaft, 500 Drive Parts - Lexmark T520 | Service Manual - Page 296
4520-xxx Assembly 22: 500-Sheet Tray (continued) 7-52 Service Manual - Lexmark T520 | Service Manual - Page 297
, Roller 1 Roller, Skewed Backup 2 Bearing, Drive Roll 1 Spring, Power Takeoff 3 Parts Packet, Screw (Board Mounting) 1 Parts Packet, Retainer (Aligner Assembly) 1 Bearing, Drive Shaft Low 1 Aligner Assembly, Paper 1 Gear, Feed Roll 1 Spring, Switch Activate 1 Spring, Backup Roller 1 Bellcrank - Lexmark T520 | Service Manual - Page 298
4520-xxx Assembly 23: Duplex Unit 7-54 Service Manual - Lexmark T520 | Service Manual - Page 299
99A0315 99A0325 99A0280 Units Description 1 Cover, Engine Board 1 Main Frame Assembly 250 Duplex 1 Main Frame Assembly 500 Duplex 1 Idler Assembly, Belt Tension 3 Spring, Aligner 3 Guide Assembly, Paper 1 Guide Assembly, Paper 2 Spring, Chassis Ground 2 Parts Packet, Screw (Motor Mount 3 mm) 1 Belt - Lexmark T520 | Service Manual - Page 300
4520-xxx Assembly 23: Duplex Unit (continued) 7-56 Service Manual - Lexmark T520 | Service Manual - Page 301
Bevel 1 Pan, Engine Board Drip 1 Bearing, Drive Shaft 1 Fuse,.8A SB 1 Board, System with Jumper 250/500 Duplex 1 Label, Options 2 Parts Packet, Screw 4 Parts Packet, Screw 1 Roller, Duplex Pass Thru 1 Jumper, Engine Board 250 Duplex 2 Parts Packet, Retainer (6 mm Backup Roll) 2 Parts Packet, Screw - Lexmark T520 | Service Manual - Page 302
4520-xxx Assembly 23: Duplex Unit (continued) 7-58 Service Manual - Lexmark T520 | Service Manual - Page 303
Screw (Outer Frame) 1 Guide Assembly, Center Drive 1 Parts Packet, Fan Mounting Kit 1 Fan, Cooling Duplex 2 Parts Packet, Retainer (5 mm Main Drive) 1 Main Drive Assembly 1 Sensor, Input Optical 250 Duplex 1 Sensor, Input Optical 500 Duplex 4 Parts Packet, Retainer (6 mm Drive Roll) 1 Shaft Assembly - Lexmark T520 | Service Manual - Page 304
4520-xxx Assembly 24: Envelope Feeder 7-60 Service Manual - Lexmark T520 | Service Manual - Page 305
1 Paper Weight Assembly 1 Guide, Edge 1 Cover, Top 1 Sensor, Envelope Pass Thru 1 Clutch, Restraint/Gear 1 Cover, Right Side 1 Support, Slide Out 7 Roller, Support 1 Motor, Stepper D.C. 1 Label, Options 1 Switch, Envelope Out 1 Board Assembly, Electronic Control 1 Parts Packet, Gear Kit 1 Cover - Lexmark T520 | Service Manual - Page 306
4520-xxx Assembly 25: High-Capacity Feeder 7-62 Service Manual - Lexmark T520 | Service Manual - Page 307
Frame, Printer Support Frame 2 Parts Packet, Screw (Printer Support 2 Frame Mounting) Clamp, Feed Frame Parts Packet, Screw Parts Packet, Washer (Card Asm Mounting) Parts Packet, Screw (Card Asm Mounting) Kit, Door Switch Spring and Bumper Parts Packet, Washer (Door Switch Spring Mounting) Parts - Lexmark T520 | Service Manual - Page 308
4520-xxx Assembly 25: High Capacity Feeder (continued) 7-64 Service Manual - Lexmark T520 | Service Manual - Page 309
Packet, Washer (Power Supply Board) 1 Power Supply Board 1 Cable, Low Voltage Power Supply 1 Bushing 2 Parts Packet, Nut - 2-56 1 Switch, Paper Low 1 Sensor Assembly, Paper Out/Upper Limit 3 Parts Packet, Screw (Support 1 Frame Mtg) 1 Frame, Printer Support 1 1 Parts Kit, Paper Size Switch Assembly - Lexmark T520 | Service Manual - Page 310
4520-xxx Assembly 25: High Capacity Feeder (continued) 7-66 Service Manual - Lexmark T520 | Service Manual - Page 311
) 1 Roll Assembly, Drive 250 Option 1 Roll, Skew Backup 1 Parts Packet, Retainer (Roller) 2 Parts Packet, Screw (Wear Plate Mounting) 1 Plate Wear, Pass Thru 1 Stud Assembly, 250 Frame 1 Bearing, Drive Shaft Low 1 Spring, Power Takeoff 1 Shaft, 250 Drive 1 Aligner Assembly, Paper Parts Catalog - Lexmark T520 | Service Manual - Page 312
4520-xxx Assembly 25: High Capacity Feeder (continued) 7-68 Service Manual - Lexmark T520 | Service Manual - Page 313
, Feed Roll 1 Bellcrank, Roller Release 1 Card Assembly, 2000 Tray Option 3 Parts Packet, Screw (Tray Option Card Mtg) 10 Parts Packet, Screw (Door to Door Frame Mounting) 6 Parts Packet, Nut Support Frame 1Hex, Support Frame 2, Hex 6 Parts Packet, Washer (Support Frame 1 Star, Support Frame 2 Star - Lexmark T520 | Service Manual - Page 314
4520-xxx Assembly 25: High Capacity Feeder (continued) 7-70 Service Manual - Lexmark T520 | Service Manual - Page 315
3 Parts Packet, Screw (Auto Comp Assembly Mounting) 1 Arm Assembly, Pick 2000 2 Roll Assembly, Pick 1 Base, 2000 Option 1 Parts Packet Parts Packet, Washer (Bracket 250 Frame Retention Mounting) 4 Parts Packet, Screw (Bracket 250 Frame Retention Mounting) 2 Bracket, 250 Frame Retention 1 Cable, Paper - Lexmark T520 | Service Manual - Page 316
4520-xxx Assembly 26: Kiosk - Vertical Paper Adapter 7-72 Service Manual - Lexmark T520 | Service Manual - Page 317
Units Description 1 Bail, Support 1 Arm Assembly, Pivot 1 Mounting, Frame Assembly 12 Parts Packet, Retainer 16 Parts Packet, Screw 1 Parts Packet, Pulley 6 Spring, Backup Roller 6 Roller, Backup 1 Tray Assembly, Drive Roller 1 Frame Assembly, Right Side 1 Cover, Right 2 Belt, 185G 1 Guide, Paper - Lexmark T520 | Service Manual - Page 318
4520-xxx Assembly 27: Kiosk - Horizontal Paper Adapter 7-74 Service Manual - Lexmark T520 | Service Manual - Page 319
99A0208 99A0087 99A0086 99A1707 99A0907 99A0232 99A1820 99A0122 99A0906 99A0088 99A0085 Units Description 1 Bail, Support 1 Arm Assembly, Pivot 1 Mounting, Frame Assembly 12 Parts Packet, Retainer 15 Parts Packet, Screw 1 Gear, Idler 2 Gear, Idler 1 Shaft, Drive Rear 1 Tray Assembly, Backup Roller - Lexmark T520 | Service Manual - Page 320
28 28 28 28 28 28 Part Number 99A1752 99A1753 99A1754 99A1755 99A1756 Board 5.0GB 1 Adapter Card, SES for SCS 1 Cable, Twinax 1 Cable, Coax 1 Adapter, Serial 1 Cable, Serial 1 Board, USB/Parallel Port 1 Card Assembly Image Quick 1 Optra Forms Hard Disk, with Control Board 7-76 Service Manual - Lexmark T520 | Service Manual - Page 321
28 28 28 28 28 28 Part Number 99A1890 99A1647 99A1654 56P1100 99A0799 1 Cartridge, Empty Shipping - T62X/T52X 1 Drive, Forms HD 2.1GB or larger 1 Kit, Cap/Stack Bails 500 1 MarkNet N2001e 10/100 Ethernet 1 MarkNet N2002e 10Base2/10Baset 1 MarkNet N2000t 4/16 1 Adapter, Omnibus INA Card 1 Paper - Lexmark T520 | Service Manual - Page 322
Cable Ties (10 each) 1 Parts Packet, Screw High Capacity Feeder 1 Parts Packet, Nuts High Capacity Feeder 1 Parts Packet, Washers High Capacity Feeder 1 Parts Kit, Multipurpose Tray 1 Parts Kit, Charge Roll Link Asm, Left Side 1 Parts Kit, Charge Roll Link Asm, Right Side 2 Printer Stand Caster, Non - Lexmark T520 | Service Manual - Page 323
- Part Index Number 29 99A0208 29 99A0234 29 99A0394 29 99A0462 29 99A1852 29 99A1853 Units Description 1 Parts Packet, Pulley - Kiosk 1 Parts Packet, Screw - Kiosk 1 Grease Packet, Nyogel 744 1 Grease Packet, IBM 23 1 Packaging, 4069 250/250 printer 1 Packaging, 4069 500/250 printer Parts Catalog - Lexmark T520 | Service Manual - Page 324
4520-xxx 7-80 Service Manual - Lexmark T520 | Service Manual - Page 325
Disabling Download Emulations 3-5 Disk Test/Clean 3-3 Duplex Option Board Connectors 5-18 Duplex Tests 3-6 E Engine Board Connectors 5-4 Envelope Option Board Connectors 5-16 Error Codes Service Error Codes 2-2 User Error Messages 2-25 Error Log 3-10 ESD-Sensitive Parts 4-1 F Flash Test 3-4 Index - Lexmark T520 | Service Manual - Page 326
L Laser Notices ix LCD Test 3-11 Low Voltage Power Supply 5-1 Lubrication Specifications 6-1 LVPS Connectors 5-1 M Maintenance Approach 1-3 Maintenance Page Count 3-19 Maintenance, Preventive 6-1 Maintenance, Scheduled 6-2 Messages Check Device Connection Messages 2-33 Service Error Codes 2-2 User - Lexmark T520 | Service Manual - Page 327
Information xviii Safety Inspection Guide 6-1 Scheduled Maintenance 6-2 Screw Identification Table 4-7 SDRAM Memory Test 3-12 Serial Wrap Test 3-13 Service Checks Charge Roll 2-40 Cover Open Switch/Cable 2-42 Dead Machine 2-43 Duplex Unit 2-45 Envelope Feeder 2-48 Fuser 2-56 Fuser Solenoid 2-60 High - Lexmark T520 | Service Manual - Page 328
Roll 2-103 Setting Configuration ID 3-20 Setting the Page Count 3-18 Status Messages 2-22 Symptom Tables 2-36 Base Printer 2-36 Duplex Unit 2-38 Envelope Feeder 2-38 High-Capacity Feeder 2-37 Paper 7-73, 7-75 7-19, 7-47, 7-49, 7-51 7-73 7-19, 7-47, 7-49, 7-51 7-47, 7-49 7-21 I-4 Service Manual - Lexmark T520 | Service Manual - Page 329
4520-xxx 99A0137 7-73 99A0148 7-25 99A0167 7-25 99A0181 7-27 99A0184 7-27 99A0185 7-27 99A0188 7-65 99A0191 7-57 99A0197 7-73, 7-75 99A0208 7-73, 7-75, 7-79 99A0219 7-65 99A0226 7-73 99A0227 7-35 99A0231 7-73, 7-75 99A0232 7-73, 7-75 99A0234 7-73, 7-75, 7-79 99A0240 7-73 99A0260 7-21 99A0263 7-3, - Lexmark T520 | Service Manual - Page 330
7-27 99A0663 7-65 99A1017 7-29 99A0664 7-65 99A1054 7-45 99A0667 7-65 99A1055 7-71 99A0672 7-67 99A1059 7-59 99A0675 7-63, 7-65, 7-67, 7-69, 7-78 99A1129 7-57 I-6 Service Manual - Lexmark T520 | Service Manual - Page 331
4520-xxx 99A1130 99A1131 99A1133 99A1134 99A1164 99A1182 99A1280 99A1290 99A1502 99A1506 99A1508 99A1509 99A1510 99A1511 99A1512 99A1517 99A1518 99A1520 99A1524 99A1525 99A1531 99A1536 99A1537 99A1538 99A1540 99A1541 99A1544 99A1546 99A1551 99A1553 99A1555 99A1569 99A1576 99A1578 99A1579 99A1582 - Lexmark T520 | Service Manual - Page 332
49, 7-71 7-63 7-73, 7-75 7-73, 7-75 7-47, 7-51, 7-63 7-77 7-5 7-79 7-79 7-17 7-77 7-77 7-49 7-19 7-7 7-11 7-47 I-8 Service Manual 99A1929 99A1930 99A1952 99A1967 99A2010 99A2011 99A2014 99A2015 99A2016 99A2017 99A2018 99A2019 99A2020 99A2021 99A2022 99A2024 99A2025 99A2026 99A2027 99A2029 99A2030 - Lexmark T520 | Service Manual - Page 333
4520-xxx 99A2067 99A2070 99A2071 99A2075 99A2076 99A2077 99A2078 99A2079 99A2080 99A2081 99A2082 99A2083 99A2084 99A2087 99A2090 99A2091 99A2092 99A2093 99A2094 99A2095 99A2150 99A2151 99A2152 99A2156 99A2157 99A2160 99A2200 99A2409 99A2422 99A2423 99A2438 99A2486 99A2487 99A2488 99A2489 99A2528 - Lexmark T520 | Service Manual - Page 334
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4520-xxx
Lexmark™ T52x
Lexmark and Lexmark with diamond
design are trademarks of Lexmark
International, Inc., registered in the
United States and/or other countries.
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