Lexmark C760 Service Manual
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- Lexmark C760 | Service Manual - Page 1
Revised: July 27, 2005 Lexmark™ C760, C762 5060-4xx • Table of Contents • Start Diagnostics • Safety and Notices • Trademarks • Index Lexmark and Lexmark with diamond design are trademarks of Lexmark International, Inc., registered in the United States and/or other countries. - Lexmark C760 | Service Manual - Page 2
include technical inaccuracies or typographical errors. Changes are periodically made to at [email protected]. Lexmark may use or distribute any of the information you supply in are trademarks of Lexmark International, Inc. LEXFAX is a service mark of Lexmark International, Inc. - Lexmark C760 | Service Manual - Page 3
the printer operator panel 2-21 Operator panel buttons 2-21 Color Menu 2-23 Utilities Menu 2-25 User attendance messages 2-27 Service checks 2-41 100 ITU Error 2-41 104 ITU Error 2-44 120 error code 2-45 121 error code 2-46 122 error code 2-46 123 error code 2-46 124 error code 2-47 - Lexmark C760 | Service Manual - Page 4
error code 2-85 927 error code 2-86 930 error code 2-86 940 error code 2-87 941 error code 2-89 942 error code 2-91 943 error code 2-93 956 service error 2-95 990 service error 2-95 5-bin mailbox option service check 2-98 500-sheet drawer option service check 2-102 AC and DC power service - Lexmark C760 | Service Manual - Page 5
no error code displayed 2-138 Smudged or distorted images on fused page 2-138 Toner is on the back of the printed page 2-139 Light lines or streaks appear on the page 2-139 White streak in color plane 2-140 Paper wrapped around the second transfer roll 2-140 Second transfer roll service check - Lexmark C760 | Service Manual - Page 6
color 3-15 Drift Sensors 3-16 TOP FINE MARGIN ADJ 3-16 MISC TESTS 3-17 Motor Detect 3-17 Toggle ITU 3-17 Belt Tracking (ITU DUPLEX TESTS 3-24 Duplex Quick Test 3-24 Duplex Top Margin Offset 3-24 Duplex Sensor Test/Clean 3-31 Flash Test 3-31 PRINTER SETUP 3-32 Defaults 3-32 PAGE COUNTS - Lexmark C760 | Service Manual - Page 7
Defaults 3-34 Fuser Temp 3-34 DC Charge Adjustment 3-34 Dev Bias Adj 3-34 Transfer Adjust 3-34 ERROR LOG 3-35 Display Log 3-35 Print Log 3-35 Clear Log 3-36 EXIT DIAGNOSTICS 3-36 HCIT standalone test mode 3-36 Repair information 4-1 Handling ESD-sensitive parts 4-1 Screw identification - Lexmark C760 | Service Manual - Page 8
Safety inspection guide 6-1 Lubrication specifications 6-1 Lubrication for replacement motors 6-2 Fuser drive assembly 6-2 Cartridge drive assembly 6-3 ITU drive assembly 6-3 Scheduled maintenance 6-4 Standard fusers 6-4 Web oiler fusers and web oiler replacements 6-4 viii Service Manual - Lexmark C760 | Service Manual - Page 9
catalog 7-1 How to use this parts catalog 7-1 Assembly 1: Covers 7-2 Assembly 2: Cartridge mounting 7-6 Assembly 3: Fuser assembly 7-7 Assembly 4: Fuser drive 7-10 Assembly 5: Vacuum transport belt (VTB) assembly 7-11 Assembly 6: Transfer 7-12 Assembly 7: Printheads 7-13 Assembly 8: Paper - Lexmark C760 | Service Manual - Page 10
5060-4xx Registration and alignment B-8 Quick Test Page B-8 Printhead mechanical alignment test page B-9 Printhead electronic alignment test page-Magenta (one of two B-10 Printhead electronic alignment test page-Magenta (two of two B-11 Index I-1 Part number index I-9 x Service Manual - Lexmark C760 | 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 C760 | Service Manual - Page 12
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. xii Service Manual - Lexmark C760 | Service Manual - Page 13
utsätts för laserstrålning över Klass I-nivå vid normal användning, underhåll som utförs av användaren eller annan föreskriven serviceåtgärd. Laser-melding Skriveren er godkjent i USA etter kravene i DHHS 21 CFR, underkapittel J, for klasse I (1) laserprodukter, og er i andre land godkjent som et - Lexmark C760 | Service Manual - Page 14
5060-4xx xiv Service Manual - Lexmark C760 | Service Manual - Page 15
components. The manufacturer is not responsible for safety in the event of use of unauthorized replacement parts. • The maintenance information for this product has been prepared for use by a professional service person and is not intended to be used by others. • There may be an increased risk - Lexmark C760 | Service Manual - Page 16
peligro y tomar las precauciones necesarias. • PRECAUCIÓN: este símbolo indica que el voltaje de la parte del equipo con la que está trabajando es peligroso. Antes de empezar, desenchufe el equipo o de estar ligado à corrente eléctrica para realizar a tarefa necessária. xvi Service Manual - Lexmark C760 | Service Manual - Page 17
producte. El personal professional ha d'estar-ne assabentat i prendre les mesures convenients. • PRECAUCIÓ: aquest símbol indica que el voltatge de la part de l'equip amb la qual esteu treballant és perillós. Abans de començar, desendolleu l'equip o extremeu les precaucions si, per treballar - Lexmark C760 | Service Manual - Page 18
a general description of the printer and the maintenance approach used to repair it. Special tools and test equipment are, as well as general environmental and safety instructions. 2. Diagnostic information contains an error indicator table, symptom tables, and service checks used to isolate failing - Lexmark C760 | Service Manual - Page 19
paper capacity to 3100 sheets. The Lexmark C76x (5060-4xx) laser printer is available in four models: Lexmark C760 Lexmark C760 Lexmark C762 Lexmark C762 5060-401 5060-402 5060-421 5060-422 Non-network Network Non-network Network Tools required for service Flat-blade screwdriver #1 Phillips - Lexmark C760 | Service Manual - Page 20
C76x paper handling options support the Lexmark C750/C752/C76x printers, however the color of the covers do not match the C750 and C752 models. The C76x envelope drawer is not compatible with the C750. Note: Do not use Lexmark C750/C752 options on the Lexmark C76x printers. • 500-Sheet drawer - Lexmark C760 | Service Manual - Page 21
print cartridge • After changing an image transfer unit (ITU) A manual calibration can be initiated by selecting Color Adjust from the Color Menu. Resolution • 1200 x 1200 dpi (one half printer speed) • 4800 CQ (default 00B) (full printer speed) Toner darkness Toner darkness settings offer five user - Lexmark C760 | Service Manual - Page 22
Lexmark C762 with maximum input trays3 (including duplex unit, three optional 500-sheet drawer, and printer stand) 23.8 in. (604.5 mm) 18.5 in. (469.9 mm) Lexmark C762 with maximum input sheets4 (including duplex lb (3.7 kg) 93.5 lb (42.5 kg) 93.5 lb (42.5 kg) 20 lb (9.1 kg) 1-4 Service Manual - Lexmark C760 | Service Manual - Page 23
Lexmark C76x(n) 500 540 30 180 5.3 10.2 Lexmark C76xdn 500 540 31 180 5.3 10.2 Note: Using a 220 to 110 power converter with the 110 volt printer ISO 9296. Model Lexmark C76x(n) Lexmark C76xdn Status 4800 CQ printing Idle (standby) 4800 CQ printing Idle (standby) 1-Meter average sound pressure - Lexmark C760 | Service Manual - Page 24
meters) - Atmospheric pressure: 74.6 kPa • Ambient operating environment* - Temperature: 60 to 90° F (15.6 to 32.2° C) - Relative humidity: 8 to 80% • Storage and shipping (packaged printer) with or without print cartridge x 11 in. 10 1200 x 1200 dpi 10 9.5 8.1 10 10 10 10 10 1-6 Service Manual - Lexmark C760 | Service Manual - Page 25
printer remains at the given speed after the last sheet of smaller media, until the fuser return to standby temperature. Media size-Multipurpose feeder Simplex printing on letter-size media (pages per minute), duplex 9 (for example, A5). Envelopesb All supported sizes 9 9 a The first 25 - Lexmark C760 | Service Manual - Page 26
(Mhz) Lexmark C76x 500 100 Lexmark C76x(n), dn 600 100 Duty cycle • Up to 60,000 pages maximum one-time usage • Up to 4,000 pages per month average usage Memory configuration DRAM memory Standard Maximum Lexmark C76x(n), dn 128MB 512MB Lexmark C76xdtn, fn 256MB 512MB 1-8 Service Manual - Lexmark C760 | Service Manual - Page 27
512MB SDRAM DIMMs are available from Lexmark. The memory options are 168 may occur if an attempt is made to operate the printer with memory other than SDRAM DIMM memory with the stated • Expansion slot for optional interface cards • Code expansion slot (application solution firmware cards) • - Lexmark C760 | Service Manual - Page 28
high-capacity input tray Capacity (sheets) Lexmark Lexmark Lexmark Lexmark Lexmark Lexmark Lexmark Lexmark C760 C760n C760dn C760dtn C762 C762n C762dn C762dtn 500 500 500 500 1100 N/A N/A 0 1100 1100 100 3 2100 3100 100 3 2100 3100 100 3 2100 3100 100 2 2100 3100 1-10 Service Manual - Lexmark C760 | Service Manual - Page 29
5060-4xx Media source or output description Capacity (sheets) Lexmark Lexmark Lexmark Lexmark Lexmark Lexmark Lexmark Lexmark C760 C760n C760dn C760dtn C762 C762n C762dn C762dtn Output Standard output bin capacity 250 250 250 250 250 250 250 250 Optional outputs 5-Bin mailbox ( - Lexmark C760 | Service Manual - Page 30
Duplex Standard output 5-bin mailbox8 Output expander8 Finisher to staple, hole punch, offset stack or with output bin8 5060-4xx Media size Media size supported x x x x 5, 6, 7 x x x x x 5, 6, 7 x x x x x x 5, 6, 7 x x x x x x 6, 7 x x x x x xxxx xxx xxxx 1-12 Service Manual - Lexmark C760 | Service Manual - Page 31
tray Envelope drawer8 2,000-sheet drawer8 Outdoor media tray8 Banner tray8 Duplex Standard output 5-bin mailbox8 Output expander8 Finisher to staple, hole punch, offset stack or with output bin8 Media size supported Envelope 7 ¾ Envelope 3.875 in. x 7.5 in. (98 mm x 191 mm) xx x x 9 Envelope - Lexmark C760 | Service Manual - Page 32
grain short) a, f Transparencies i, j Xerographic or business paper Gloss book Gloss cover Index Bristol Tag Cover Index Bristol Tag Cover Laser printer type 16 to 19.9 lb bond (60 to 74.9 g/m2 grain long) 20 to 47 lb bond (75 to 176 135 g/m2) 16 to 28 lb bond (60 to 105 g/m2) 1-14 Service Manual - Lexmark C760 | Service Manual - Page 33
supported in duplex. c Pressure-sensitive area must enter the printer Lexmark's criteria. Refer to the Card Stock and Label Guide for more details. i Lexmark transparency numbers 12A5940 and 12A5941 are supported Cover 80 lb (216 g/m2) Transparencies i,j Laser printer type 43 to 45 lb bond (161 - Lexmark C760 | Service Manual - Page 34
-sheet trays and the multipurpose feeder. j Lexmark transparency numbers 12A5150 and 12A5151 are supported from the multipurpose feeder only. k The web oiler might be used for extensive use of vinyl or dual web labels. See "Web oiler upgrade kit and replacements" on page 1-17. 1-16 Service Manual - Lexmark C760 | Service Manual - Page 35
Part number 115 V web oiler upgrade kit 56P1555 220 V web oiler upgrade kit 56P1556 100 V web oiler upgrade kit 56P1557 The installation of the web oiler upgrade kit converts a standard Lexmark C76x printer to an oil web capable printer. The web oiler upgrade kit includes an oiler fuser - Lexmark C760 | Service Manual - Page 36
Position Sensing Device Pulse Width Modulation Raster Imaging Processor Read Only Memory Synchronous Dual Random Access Memory Single Inline Memory Module Static Random Access Memory Used Parts Return Volts alternating current Volts direct current Vacuum Transport Belt Yellow 1-18 Service Manual - Lexmark C760 | Service Manual - Page 37
the following locations: - "Sub error code table" on page 2-18 - "Understanding the printer operator panel" on page 2-21 - "Service checks" on page 2-41 Note: There may be printer error messages that are not contained in this service manual. Call your next level support for assistance. Diagnostic - Lexmark C760 | Service Manual - Page 38
on, or the front cover is closed, that a new or different toner cartridge has been installed. • The printer detects at power on when the cover is closed that a new or different ITU has been installed. • The printer detects at power on that the fuser temperature is below 60° C. • When coming out of - Lexmark C760 | Service Manual - Page 39
to "926 error code" on page 2-85. Excessive fuser drive motor assembly noise Go to "Excessive fuser drive motor assembly noise" on page 2-124. Machine inoperative: Fans don't turn, engine not on, Go to "AC and DC power service check" on lights not on, and none of the printer functions work. page - Lexmark C760 | Service Manual - Page 40
Action Go to "Poor color alignment" on page 2-136. Go to "Toner is on the back of the printed page" on page 2-139. Go to "Toner smears or rubs off the page with no error code displayed" on page 2-138. Go to "Vertical lines or streaks" on page 2-134 Symptom Action Printer fails to recognize the - Lexmark C760 | Service Manual - Page 41
Paper Jam appears, paper does not feed into the bin selected. Go to "The printer does not recognize one or more output options as installed." on page 2-99. Go , or not recognized" on page 2-118 Front door is open and no error message appears Go to "Front door is open, no indication on display" on - Lexmark C760 | Service Manual - Page 42
-4xx Error code table Error code 9xx service errors 900 RIP Software Error 902 Service Engine Error 0 904 Engine Software 906 Engine RAM Error 907 Engine Flash Error 920 Color Calibrate 921 Color Calibrate 922 Color Calibrate 925 Fan Stalled 926 Fan Stalled 927 Fan Stalled 930 LV Power Supply 931 - Lexmark C760 | Service Manual - Page 43
4-72. A four digit code displays . Go to "956 service error" on page 2-95. Download Emulation 2. Program the download emulation into the code overlay SIMM, again. 3. If the problem is not resolved, replace the code overlay SIMM and download emulation, again. Unrecognizable network Errors - Lexmark C760 | Service Manual - Page 44
5060-4xx Error code 983 comm 984 comm 990 991 System Card Failure 1xx service errors 100 ITU Error 101 ITU Error 102 ITU Error 103 ITU Error 104 ITU Error 106 Printhead Error Action Invalid command received by the specified device. Note: This message is used for - Lexmark C760 | Service Manual - Page 45
Error code 107 Printhead Error 108 Printhead Error 109 Printhead Error 110 Printhead Error 111 Printhead Error 112 Printhead Error 5060-4xx Action Magenta printhead lost Hsync Check for the correct installation of all the cables to the system board assembly and to the printhead - Lexmark C760 | Service Manual - Page 46
5060-4xx Error code 113 Printhead Error 114 Printhead Error Action No Error If error persists, see "Printhead diagnostics" on page 3-1. A magenta printhead servo error has been detected. Verify all packing material have been removed from the printer and the printhead. 2-10 Service Manual If error - Lexmark C760 | Service Manual - Page 47
Error code 117 Printhead Error 5060-4xx Action A yellow printhead servo error has been detected. Verify all packing material have been removed from the printer and the printhead. 120 Fuser Error 121 Fuser Error 122 Fuser Error 123 Fuser Error 124 Fuser Error 125 Fuser Error 126 Fuser Error 127 - Lexmark C760 | Service Manual - Page 48
this does not fix the problem, replace the "System board" on page 4-72. ITU belt motor, unable to lock - go to "148 error code" on page 2-56. Black cartridge motor unable to lock - go to "150 error code" on page 2-57. Magenta cartridge motor unable to lock - go to "151 error code" on page 2-58. Cyan - Lexmark C760 | Service Manual - Page 49
176 Motor 196 Service Thermal System 199 Service Reflash RIP Action Cyan cartridge BLDC motor mfg. unknown - go to "164 error code" on page 2-64. Yellow cartridge BLDC motor mfg. unknown - go to "165 error code" on page 2-65. The incorrect configuration ID. See "Web oiler fuser kit installation" on - Lexmark C760 | Service Manual - Page 50
ID requested for programming is not valid. Package size error - An update file was used to program the printer, but the package did not fit within the space out the DLE partition first). User Flash partition in use - An attempt was made to program code over a user flash part. 2-14 Service Manual - Lexmark C760 | Service Manual - Page 51
201 Paper Jam Clear Paper Path 202 Paper Jam Clear Paper Path User secondary message Leave sheets in Finisher area 5 Leave sheets in Finisher media does not fix the problem, go to "201 Paper Jam" on page 2-70. Primary: Media has jammed at the fuser. Open the printer right door to access the jam - Lexmark C760 | Service Manual - Page 52
duplex option. Remove the duplex printer will not reprint these sheets. Also if the print job is completed, the portion of the job printed after the jam will not be stapled. If removing the jammed media does not fix the problem, go to "271 Paper Jam - check bin 1" on page 2-80. 2-16 Service Manual - Lexmark C760 | Service Manual - Page 53
Paper Path 282 Staple Jam Check Stapler User secondary message Leave Job in Finisher area stapled. If removing the jammed media does not fix the problem, go to "280 Paper Jam" on page 2-82. stapler cartridge to check for staple jam. Note: After the error has been cleared, the printer does not - Lexmark C760 | Service Manual - Page 54
error code table Use this table to troubleshoot the printer when 9xx and 2xx Error Codes are displayed. When a 9xx or 2xx error code is displayed, press and hold Return and press Select to view the Sub error code. Sub error code obstructed. Fuser narrow media sensor obstructed. 2-18 Service Manual - Lexmark C760 | Service Manual - Page 55
5060-4xx Sub error code Explanation 2D 1D 2D 1E 2D 1F 2D 20 2D 21 2D 2E 2D 2F 2D 30 2D 31 2D 32 2D 33 2D 34 2D 35 2D 36 2D 37 2D 38 Fuser exit sensor obstructed. Duplex sensor(s) obstructed. Tray 2 sensor obstructed. Tray 3 sensor obstructed. Tray 4 sensor obstructed. Pass thru sensor in Stacker - Lexmark C760 | Service Manual - Page 56
5060-4xx Sub error code Explanation 2D 3E 2D 3F 2D 40 2D 41 2D 42 2D 43 2D 44 2D 45 2D 46 2D page complete. 5-Bin mailbox S1 broke early. 5-Bin mailbox S2 broke early. Output expander sensor broke early. Detected early break of fuser exit sensor. Finisher detected staple jam. 2-20 Service Manual - Lexmark C760 | Service Manual - Page 57
Exit Power Saver. If you have changed printer settings from the operator panel menus, press Go before sending a job to print. The printer must line of the display. • Save the displayed menu item as the new user default setting. • Clear certain messages from the display. • Continue printing after - Lexmark C760 | Service Manual - Page 58
XON Baud Data Bits Parity Honor DSR Supplies Menu Toner Oiler Waste Bottle USB Menu PCL SmartSwitch PS SmartSwitch MAC Binary PS NPA Mode USB Buffer Job Buffering Setup Menu Printer Language Printer Usage Power Saver Resource Save Download Target Print Timeout Auto Continue Wait Timeout - Lexmark C760 | Service Manual - Page 59
the selections available under the Manual Color menu item. To assist users in selecting colors to be printed. Users can print color samples pages for each of the RGB and CMYK color conversion tables used in the printer. The color samples pages consist of a series of colored boxes along with the RGB - Lexmark C760 | Service Manual - Page 60
-4xx Menu Item Purpose Values Color Saver Manual Color Print Mode Print Resolution To conserve toner. If selected, this setting overrides Toner Darkness settings. To let users customize the RGB or CMYK color conversions applied to each object on the printed page. Color conversion of the data - Lexmark C760 | Service Manual - Page 61
reduction in toner consumption. Utilities Menu Use the Utilities Menu to print a variety of listings relating to available printer resources, printer settings, and print jobs. Other menu items let you set up printer hardware and troubleshoot printer problems. Menu Item Color Alignment Coverage - Lexmark C760 | Service Manual - Page 62
for PCL emulation. PS Fonts Prints a sample of all printer fonts available for PostScript emulation. Print Menus Print Net Setup To print a listing of the current user default values, the installed options, the amount of installed printer memory, and the status of printer supplies. To print - Lexmark C760 | Service Manual - Page 63
Use the "Sub error code table" on page 2-18 to help diagnose paper jam problems. User primary message Setup Required User secondary message A through 5) • Tray x (x=2,3,4 or 5) • Duplex • Finisher The specified option could have been removed from the printer, maybe to clear a paper jam or to - Lexmark C760 | Service Manual - Page 64
User secondary message Close Door Close Finisher Door Disk Corrupted Empty Hole Punch Box Priming Failed, Retry. GO/Stop Insert Staple Cartridge Explanation This message is displayed when the printer the code has determined that the when an error has occurred during the printer staple priming - Lexmark C760 | Service Manual - Page 65
User secondary batch). The following actions can be taken: • A new staple cartridge may be installed to clear this message and start/continue printing the staple the Busy/Waiting Menu: • Cancel Job • Reset Printer • Reset Active Bin • Check Supply Levels Note: Menu Lockout does NOT prevent access - Lexmark C760 | Service Manual - Page 66
option or • Press Menu to access the Busy/Waiting Menu Group. The following functions are available using the Busy/Waiting Menu: • Cancel Job • Reset Printer • Reset Active Bin • Check Supply Levels This message is displayed when the printer is turned on and no DRAM is detected. 2-30 Service Manual - Lexmark C760 | Service Manual - Page 67
Yellow 33 Calibration Error Black If the ITU is not present, turn the printer off, insert the ITU, move the lever to the 6 o'clock position, and turn the printer back on. This message is displayed when the printer is missing the yellow, magenta, cyan, or black toner cartridge. Open the front cover - Lexmark C760 | Service Manual - Page 68
the error and continue printing pages or • Press Menu to access the Busy/Waiting Menu. The following functions are available using the Busy/Waiting Menu: • Cancel Job • Reset Printer • Reset Active Bin • Check Supply Levels to the memory available when Resource Save is disabled. 2-32 Service Manual - Lexmark C760 | Service Manual - Page 69
fix the problem. Press Go to clear the error. If the Service Printer message is displayed it means that a TPS failure has most likely occurred. The printer continues to operate but the color quality degrades. The most probable cause for this error message is a defective print cartridge or ITU. This - Lexmark C760 | Service Manual - Page 70
Change message are: - Code version change - Paper handling option removed - Disk drive has been moved to a different printer. • Primary Message: Job • Reset Printer • Reset Active Bin • Check Supply Levels Note: Menu Lockout does NOT prevent access to the Busy/ Waiting Menu. 2-34 Service Manual - Lexmark C760 | Service Manual - Page 71
the printer has detected a refilled Return Program cartridge. can be black, cyan, magenta, or yellow. Remove the toner cartridge and install a new cartridge. Press and hold Select and then press Return to display any secondary error codes that might help diagnose a problem. Note: The user - Lexmark C760 | Service Manual - Page 72
message. Any data received on the serial port is discarded. • Press Menu to access the Busy/Waiting Menu. The following functions may be available: • Reset Printer • Reset Active Bin • Check Supply Levels Note: Menu Lockout does NOT prevent access to the Busy/ Waiting Menu. 2-36 Service Manual - Lexmark C760 | Service Manual - Page 73
User secondary message Explanation These messages may appear when data is sent to the printer across a parallel port, but the port is disabled. Note: Once the error is displayed the first time, reporting of further errors is suppressed until the printer Printer • Reset Active Bin • Check Supply - Lexmark C760 | Service Manual - Page 74
a Check Option Connections/Reattach Option attendance condition, the user must reinstall an associated compatible option or Hot Unplug the option. This message is displayed when the printer detects a defective disk. This error may occur at power on, or during disk format and write operations. Press - Lexmark C760 | Service Manual - Page 75
5060-4xx User primary message User secondary message 63 Unformatted Disk 64 Unsupported Disk Format 80 Fuser Maintenance 81 Engine Code CRC Failure 82 Waste Toner Bottle Full 82 Waste Toner Bottle Missing 82 Waste Bottle Nearly Full 83 ITU Maintenance 84 Replace Oiler 84 Oiler Nearly Exhausted - Lexmark C760 | Service Manual - Page 76
5060-4xx User primary message 85 ITU Maintenance 86 ITU Maintenance User secondary message 87 Fuser Missing 88 Yellow Toner Low 88 Magenta Toner Low 88 Cyan Toner Low 88 Black Toner Low 89 ITU Maintenance Explanation Check printouts for excess toner. If present, replace the suspect cartridge. - Lexmark C760 | Service Manual - Page 77
Service checks 100 ITU Error A 100 ITU error indicates that the printer did not detect the ITU belt home sensor. Before proceeding with this service check make sure that the Second Transfer Roll is correctly installed. After you reinstall the Second Transfer Roll, check to see if a 100 ITU error - Lexmark C760 | Service Manual - Page 78
step 6 Go to step 7 Go to step 11 Reinstall the second transfer roll. Go to step 5 Reinstall the cable correctly. Check again for a 100 ITU Error. If 100 ITU Error is displayed, go to step 6 Position the shield on top of the belt. Go to step 8 Is the ITU Cleaner Gear turning? 2-42 Service Manual - Lexmark C760 | Service Manual - Page 79
the MFP door to its horizontal position. Observe the gear on the left end of the ITU Drive Roll. The ITU Drive Roll Gear should turn for a few seconds slowly and smoothly before the printer posts a 100 ITU error. Yes Go to step 10 No Go to step 9 Does the Gear turn? 9 Check to see - Lexmark C760 | Service Manual - Page 80
log. Look for past occurrences of 100 ITU Errors preceded by a 104 ITU Error. Step 1 2 Action and questions Make sure all packing material is removed from the printer. The Detensioner is located underneath the toner cartridges. Make sure the ITU Detensioner is removed. Remove the Detensioner by - Lexmark C760 | Service Manual - Page 81
communications problem. See "100 ITU Error" on page 2-41. Has the ITU Belt shifted to the front or to the rear? 120 error code This error code displays whenever an incorrect hot roll fuser lamp is installed. Step Action and questions Yes 1 Check to make sure that the line voltage to the printer - Lexmark C760 | Service Manual - Page 82
35. 2. "LVPS assembly" on page 4-46. 3. "System board" on page 4-72. 123 error code Cold fuser If error code 123 is displays, the printer detects a problem in the fuser hot roll lamp circuits, back up roll fuser lamp circuits, fuser hot roll thermistor, back up roll thermistor, system board, or LVPS - Lexmark C760 | Service Manual - Page 83
-4xx 124 error code Hot fuser Error code 124 displays whenever the printer detects a problem with the fuser running over temperature or the fuser lamps have been on too long. A problem could exist in the fuser assembly with the hot roll bearings, hot roll thermistor, or other hot roll parts. The - Lexmark C760 | Service Manual - Page 84
72. Replace the "LVPS assembly" on page 4-46 127 error code Backup roll thermistor or thermistor circuits are open If error code 127 displays the printer detects a problem in the fuser hot roll or back up roll fuser lamp circuits, fuser hot roll thermistor, back up roll thermistor, system board, or - Lexmark C760 | Service Manual - Page 85
6 of the connector. Does the voltage measure approximately +3.3 V dc. Yes Go to step 2 Replace the"Fuser assembly" on page 4-35. 129 error code Fuser backup roll is under temperature during standby. Step Action and questions 1 Turn the printer on and allow it to reach a Ready prompt. Note: The - Lexmark C760 | Service Manual - Page 86
as the lamp heat up. Do the lamps turn on? 5 Turn the printer on and allow it to reach a Ready prompt. Note: The printer may not complete POR and continues to display the error code. Remove the fuser assembly from the printer. Measure the voltage on connector J33-6 on the system board. The voltage - Lexmark C760 | Service Manual - Page 87
as the lamp heat up. Do the lamps turn on? 5 Turn the printer on and allow it to reach a Ready prompt. Note: The printer may not complete POR and continues to display the error code. Remove the fuser assembly from the printer. Measure the voltage on connector J33-7 on the system board. The voltage - Lexmark C760 | Service Manual - Page 88
4 4 Reinstall the fuser assembly. Watch to see printer on and allow it to reach a Ready prompt. Go to step 6 Note: The printer may not complete POR and may continue to display the error code. Remove the fuser from the printer problem, replace the "Fuser assembly" on page 4-35. Replace the "Fuser - Lexmark C760 | Service Manual - Page 89
printer on and allow it to reach a Ready prompt. Note: The printer may not complete POR and continues to display the error code. Remove the fuser assembly from the printer the lamp correctly. If this does not fix the problem, replace the "Fuser assembly" on page 4-35. Replace the "LVPS assembly - Lexmark C760 | Service Manual - Page 90
board" on page 4-72. 135 error code Error code 135 indicates that a problem exists in the fuser assembly with the backup roll bearings, backup roll thermistor, LVPS, or system board. Step 1 2 Action and questions Power on the printer. Open the right side of the fuser access door. Observe the hot - Lexmark C760 | Service Manual - Page 91
to J33 on the system board. Make sure the cable is properly connected. Is the cable installed correctly? 4 Remove the fuser from the printer. Measure the voltage at the DC fuser control connector on the LVPS on pin 2 and 9 on the connector. The voltage should measure approximately +5 V dc. Is the - Lexmark C760 | Service Manual - Page 92
the ITU drive motor assembly. Manually turn the motor. Do the gears on the ITU drive motor assembly turn freely? Replace the system board. If this does not fix the problem, replace the ITU drive motor. Contact your next level support Go to step 6 Replace the ITU motor drive assembly 2-56 Service - Lexmark C760 | Service Manual - Page 93
"Motor Detect" on page 3-17. If this procedure is not performed, error code 168 is displayed. Step 1 2 3 Actions and questions Indicates the black cartridge drive motor has either failed to lock or has lost lock. Check the black cartridge drive motor cable connection to J30 on the system board. Is - Lexmark C760 | Service Manual - Page 94
the system board. Does this fix the problem? Problem solved Problem solved No Install the cable correctly Install the cable correctly Replace the magenta cartridge assembly cable Go to step 5 Call your next level support 152 error code Cyan cartridge drive assembly Note: Any time any of the - Lexmark C760 | Service Manual - Page 95
4xx Step 5 Actions and questions Replace the system board. Does this fix the problem? Yes Problem solved No Call your next level support 153 error code Yellow cartridge drive assembly Note: Any time any of the cartridge drive motor assemblies are replaced perform the "Motor Detect" on page 3-17 - Lexmark C760 | Service Manual - Page 96
the ITU drive motor assembly. Manually turn the motor. Do the gears on the ITU drive motor assembly turn freely? Replace the system board. If this does not fix the problem, replace the ITU drive motor. Contact your next level support Go to step 6 Replace the ITU motor drive assembly 2-60 Service - Lexmark C760 | Service Manual - Page 97
Detect" on page 3-17. If this procedure is not performed, error code 168 is displayed. Step 1 2 3 Actions and questions Error code 156 - The black cartridge drive motor has either failed to lock or has lost lock. Check the black cartridge drive motor cable connection to J30 on the system board. Is - Lexmark C760 | Service Manual - Page 98
Go to step 4 Problem solved Problem solved No Install the cable correctly Install the cable correctly Replace the magenta cartridge assembly cable Go to step 5 Call your next level support 158 error code Cyan cartridge drive assembly Step 1 2 3 4 5 Actions and questions Error code 158 - The cyan - Lexmark C760 | Service Manual - Page 99
3 Go to step 4 Problem solved Problem solved No Install the cable correctly Install the cable correctly Replace the yellow cartridge assembly cable Go to step 5 Call your next level support 160 error code ITU drive motor service check Step 1 Action and questions Error code 160 indicates that an - Lexmark C760 | Service Manual - Page 100
drive assembly. Go to "Cartridge drive assembly" on page 4-30. Perform the "Motor Detect" on page 3-17. Does the printer display error code 164? Reflash the NVRAM. Does error code 164 continue? Yes Go to step 2 Call your next level support No Problem solved Problem solved 2-64 Service Manual - Lexmark C760 | Service Manual - Page 101
assembly. Go to "Cartridge drive assembly" on page 4-30. Perform the "Motor Detect" on page 3-17. Does the printer display error code 165? Reflash the NVRAM. Does error code 165 continue? Yes Go to step 2 Call your next level support No Problem solved Problem solved Diagnostic information 2-65 - Lexmark C760 | Service Manual - Page 102
the operator panel. Press and hold Return and press Select to view the sub error code. 2. Compare the sub error code to the list below and go to the appropriate service check. Sub error code Service check 2D 1B 2D 1C 2D 11 2D 03 2D 0F 2D 02 2D 05 2D 04 2D 06 "S2 or narrow - Lexmark C760 | Service Manual - Page 103
See "Printer sensors" on page 5-3. Step 1 2 Action and questions Check the tray for proper edge guide setting and media loading. Edge guides should be Correct the deflector position. Go to "Autocompensa tor service check" on page 2-107 Call your next level of support. Go to step 5 Go to step 6 See - Lexmark C760 | Service Manual - Page 104
the roller drive system on the bottom of the duplex option. Yes Go to step 2 Go to step 3 Remove obstruction or replace damaged parts. No Go to "200 Paper Jam- Tray 1" on page 2-66 Load media properly. Go to step 4 Replace the duplex option or 500-sheet option as needed. 2-68 Service Manual - Lexmark C760 | Service Manual - Page 105
media installed in the tray meets specifications. Note: The HCIT only supports paper. Does the media meet specifications? Does the media feed correctly to "500-sheet option or envelope option" on page 2-68 Replace the duplex option. No Inform customer that media does not meet specifications. Go to " - Lexmark C760 | Service Manual - Page 106
Step 1 2 3 4 5 6 7 8 Action and questions Remove fuser from printer, remove oiler housing from fuser, and pivot the paper guide up. Is paper jammed inside the fuser? Check fuser entry guide for toner buildup. Is toner built up on the fuser entry guide? Check fuser exit sensor flag. Does the flag - Lexmark C760 | Service Manual - Page 107
fuser from the printer. Remove the oiler housing from the fuser, and pivot the paper guide up. Is media jammed inside the fuser? 2 Check fuser Does the fuser exit sensor pass? Got to step 5 5 Check that the duplex diverter rotates freely with the redrive door closed. Does the duplex diverter rotate - Lexmark C760 | Service Manual - Page 108
button. Go to step 11 Check the following: • Reseat the option on the printer. • Verify the top cover is properly seated on developer HVPS. No Replace the "Lower right door assembly" on page 4-18. Go to step 9 Go to step 10 Realign the finisher. Call your next level of support. 2-72 Service Manual - Lexmark C760 | Service Manual - Page 109
right door assembly" on page 4-18. Go to step 8 Replace the "Fuser assembly" on page 4-35. Does the diverter operate freely? 5 Close the redrive Repair the actuator link. Replace the Actuator button. Replace the duplex option. Replace the duplex option. Replace the "Redrive door" on page 4-19. - Lexmark C760 | Service Manual - Page 110
paper through the tray access door. Run the Tray x feed test from the Diagnostics Menu to help diagnose a feed problem. See "Feed Test" on page 3-25. Is the media leaving the tray? 5 Are both of the autocompensator to step 9 Go to step 7 Go to step 8 Install the cable correctly 2-74 Service Manual - Lexmark C760 | Service Manual - Page 111
feeding from the tray and through the feed assembly. Use the "HCIT system board LED error code table" on page 2-121 to further isolate paper jam or sensor problems. Before proceeding with this service check, make sure the HCIT is installed correctly. Step 1 2 Action and questions Check for pieces - Lexmark C760 | Service Manual - Page 112
jams. Use the "HCIT system board LED error code table" on page 2-121 to help isolate problems in the feed unit assembly. Are you able order shown: 1. HCIT system board 2. Feed unit assembly Repair or replace parts as necessary No Install the cable correctly Go to step 11 Install the 76 Service Manual - Lexmark C760 | Service Manual - Page 113
tray. • No cotton content, or as little as possible to meet the user's needs. • If the envelopes have a pressure sensitive adhesive flap, performance tray and reversing the image in the drive or application. Are any problems found with the envelopes? Make sure the envelopes are loaded correctly. - Lexmark C760 | Service Manual - Page 114
media in the MPF does not meet specifications. Go to"Tray 1 service check" on page 2-142. Correct the Paper Type setting. Properly load the media. Go to step 6 Go to step 7 Replace the MPF bracket assembly. See "MPF bracket assembly" on page 7-19 Call your next level of support. 2-78 Service Manual - Lexmark C760 | Service Manual - Page 115
Paper Jam even though the sensor is malfunctioning. Step Action and questions 1 Enter the Diagnostics Menu. Select INPUT TRAY TESTS, Sensor Test, and MP Feeder. Manually actuate the MPF sensor by moving the paper flag in the MPF. Does the test pass? 2 Make sure that the MPF sensor cable from the - Lexmark C760 | Service Manual - Page 116
Note: Before proceeding with this service check run the Output Bin x Sensor Test and check for the failing sensor. Sensor Tests: XNF Near Full (Upper part of sensor assembly) F Full (Lower part of sensor assembly) P Pass to step 4 Replace the output expander control board 2-80 Service Manual - Lexmark C760 | Service Manual - Page 117
flag - Make sure the flag is operating correctly and is not binding, broken, and there is no interference from the sensor cable. Is there any problem found with the sensor flag? Bottom pass thru sensor - Make sure the sensor is correctly connected to J5 on the control board. Is the sensor - Lexmark C760 | Service Manual - Page 118
printer and to diagnose a 280 Paper Jam. Check the area indicated to find the jam and the problem. If this does not fix the problem, contact the next level ow support error. Belt motor homing timeout error. Paper jam in accumulator, motor or sensor failure. Tray elevation motor timeout error belt - Lexmark C760 | Service Manual - Page 119
to operate the lever Turn the printer off, insert the ITU, move the lever to the 6 o'clock position, and turn the printer back on. Yes Go to step 2 No Problem resolved Does the 900 error display? 2 Disconnect the printer from any external connections. Turn the power off and remove any parallel - Lexmark C760 | Service Manual - Page 120
. 2. Disconnect the printer from the network. 3. Power the printer on and complete the setup process. 4. When setup is complete, power off the printer and reconnect to the network. Is the same 900 Service Error displayed? Yes Contact your next level support No Problem solved 2-84 Service Manual - Lexmark C760 | Service Manual - Page 121
Fuser fan" on page 4-38 Install the cable correctly Replace the "System board" on page 4-72 926 error code VTB Fan service check Step 1 Actions and questions Turn the power off and manually the and check the voltages on J32. "Vacuum transport belt Pin Fan on Fan off Fan Fan (VTB) fan" - Lexmark C760 | Service Manual - Page 122
5060-4xx 927 error code RIP Fan service check Step Actions and questions 1 Turn the power off and manually spin the fan cable correctly Replace the "System board" on page 4-72 930 error code LVPS This problem with the fuser circuits is usually the zero crossover signal from the LVPS not working - Lexmark C760 | Service Manual - Page 123
replace the cartridge if there are no problems with the printer or if the cartridge is known to be defective. Note: Before proceeding with this service check, observe the error log for repetitive occurrences of a 94x service error. Step Actions and questions 1 Check the toner metering cam (A) on - Lexmark C760 | Service Manual - Page 124
pin in the cyan cartridge contact assembly make sure need to turn the printer off to hear the mount the power supply are properly TMC pin in the cartridge contact assembly. Does the 0 V dc? Yes Replace the cartridge. Go to step 6 Replace the Recheck the printer to see if a 940 Error is still - Lexmark C760 | Service Manual - Page 125
replace the cartridge if there are no problems with the printer or if the cartridge is known to be defective. Note: Before proceeding with this service check, observe the error log for repetitive occurrences of a 94x service error. Step Actions and questions 1 Check the toner metering cam (A) on - Lexmark C760 | Service Manual - Page 126
pin in the magenta cartridge contact assembly make sure need to turn the printer off to hear the mount the power supply are properly pin in the cartridge contact assembly. Does approximately 0 V dc? Yes Replace the cartridge. Go to step 6 Replace the Recheck the printer to see if a 941 Error is still - Lexmark C760 | Service Manual - Page 127
replace the cartridge if there are no problems with the printer or if the cartridge is known to be defective. Note: Before proceeding with this service check, observe the error log for repetitive occurrences of a 94x service error. Step Actions and questions 1 Check the toner metering cam (A) on - Lexmark C760 | Service Manual - Page 128
pin in the yellow cartridge contact assembly make sure need to turn the printer off to hear the mount the power supply are properly TMC pin in the cartridge contact assembly. Does the 0 V dc? Yes Replace the cartridge. Go to step 6 Replace the Recheck the printer to see if a 942 Error is still - Lexmark C760 | Service Manual - Page 129
replace the cartridge if there are no problems with the printer or if the cartridge is known to be defective. Note: Before proceeding with this service check, observe the error log for repetitive occurrences of a 94x service error. Step 1 Actions and questions Check the toner metering cam (A) on - Lexmark C760 | Service Manual - Page 130
pin in the black cartridge contact assembly make sure need to turn the printer off to hear the mount the power supply are properly TMC pin in the cartridge contact assembly. Does the 0 V dc? Yes Replace the cartridge. Go to step 6 Replace the Recheck the printer to see if a 943 Error is still - Lexmark C760 | Service Manual - Page 131
. Turn the printer off and then on between each option board to view any error messages. Does the error reappear? Yes Replace the system board. See "System board" on page 4-72. Replace the failing option board. No Go to step 2 Problem fixed. 990 service error This error indicates which option - Lexmark C760 | Service Manual - Page 132
Service Error - Tray x, x=Tray 2, 3, 4 or 5, this is the tray that has a problem or needs service. Note: Verify the autoconnect housing is correctly snapped into the printer for worn or broken parts in the autocompensator and drive assemblies. Are any parts worn, broken, or damaged Service Manual - Lexmark C760 | Service Manual - Page 133
top of the printer. Is the cable error is installed, press and hold Return and Repair the Select to view the sub error code problem? No Install correctly Install correctly Install correctly Contact your next level of support. EQC 45 4C 50 DB1 05 0C 10 Explanation Jogger motor homing timeout error - Lexmark C760 | Service Manual - Page 134
service the unit. Make sure the machine is configured correctly. The majority of the mechanical components can be observed during operation by removing the left and right side covers. Step 1 Symptoms Problems with excessive static electricity buildup. 2 The printer to step 9 2-98 Service Manual - Lexmark C760 | Service Manual - Page 135
Step 9 Symptoms 990 Service Error Yes Go to 950 Error Code service check. No Call your next level support The printer does not recognize one or more output options as installed. Note: If more than a single output option is installed, check each one to see if the printer recognizes any single - Lexmark C760 | Service Manual - Page 136
correctly? Bin x sensor flag - Check the bin x sensor flag for binding and proper operation. Are there any problems with the sensor flag? Bin x sensor cable - Check the continuity of the sensor cable. Is there continuity? cable correctly Go to step 4 Replace the bin x cable 2-100 Service Manual - Lexmark C760 | Service Manual - Page 137
the deflector or deflector cover, broken or binding shaft assemblies, or broken gear teeth. Are parts broken, loose, binding, or missing? Bin x solenoid - Check the solenoid for any binds or sticking problems. Is the solenoid binding or sticking? Bin x solenoid - Check the resistance of the solenoid - Lexmark C760 | Service Manual - Page 138
cables - check the autoconnect from the printer or option above tray x. Check for cuts, pinched wiring, or damage to the contacts in the connector. Are there any problems with the autoconnect cables? 5 Tray x (includes the system board) Replace the "System board" on page 4-72 2-102 Service Manual - Lexmark C760 | Service Manual - Page 139
position. Remove the tray and manually reset the autocompensator to its uppermost parts loose, broken, or missing? Yes Go to step 2 Problem solved Go to step 4 Repair or replace as necessary No Go to step 3 Go to step 3 Install the bellcrank correctly Call your next level of support. The printer - Lexmark C760 | Service Manual - Page 140
printer the following for damaged or broken parts: • Paper level sensing flag the arm. If the problem continues, replace the paper leveling sensing assembly. If the problem persists, replace the tray parts. Are there broken or damaged parts? Yes Go to step 2 Repair or replace defective parts - Lexmark C760 | Service Manual - Page 141
the LED turned on? Yes Go to "AC power service check" on page 2-105 No Go to "DC power service check" on page 2-106 AC power service check The printer appears to be inoperative when turned on with the Power on/Status LED off, the LCD display is blank, the Fuser lamps do not come on and no motors - Lexmark C760 | Service Manual - Page 142
Step 6 Actions and questions Low voltage power supply - Turn the power off and disconnect the LVPS at or "System board - network" on page 5-7. Does the printer power up and display a message? Yes Go to "Operator panel LCD/ status LED/ buttons service check" on page 2-125 Go to step 3 Go to step - Lexmark C760 | Service Manual - Page 143
this step until the original DC power problem occurs. Does the DC power problem occur? Yes Check the cable and component that was last connected to system board for short. No If printer comes to Ready, connect the remaining cables and print. Autocompensator service check • If the paper fails to - Lexmark C760 | Service Manual - Page 144
1 from the printer? Open the lower parts as necessary No Go to step 2 Determine what is causing the tray to stay in a locked position. Repair as necessary Go to step 4 Go to step 5 Determine what is causing the autocompensator to stay in the down position. Repair as necessary. 2-108 Service Manual - Lexmark C760 | Service Manual - Page 145
level sensor inside the printer. The paper level Call your next level support Repair or replace parts as necessary Go to cartridges and watch the belt while activating the toggle function. Does the ITU belt move up and down when the ITU is toggled? Remove the ITU. Locate the BOR gear and manually - Lexmark C760 | Service Manual - Page 146
access door support and with the switch mounted in the ITU light shield. Note: When the printer is powered on for some time with this symptom displayed, the printer may then display a 902 Service Error. Step Printhead interlock cable assembly" on page 7-22 for the part number.) 2-110 Service Manual - Lexmark C760 | Service Manual - Page 147
4xx POR complete, printer feeds blank page This symptom is usually associated with the upper switch mounted on the front access door support. Step 1 2 3 4 Action and Questions Make sure that the ITU light shield is not broken. Is the ITU light shield broken? Make sure that the ITU light shield is - Lexmark C760 | Service Manual - Page 148
beneath the printer. Try to isolate which of the options is causing the problem. Go to step 4 Go to step 3 Install the duplex option correctly Go to step 5 Install the cable correctly Go to step 6 Install the cable correctly Go to step 7 Replace the system board 2-112 Service Manual - Lexmark C760 | Service Manual - Page 149
options board. Is the cable connected correctly? 10 Check continuity of the upper duplex options cable. Is there continuity? Go to step 10 Replace the duplex options board No Replace the bottom options cable in the printer Correctly install the cable. If the connector is damaged, replace the cable - Lexmark C760 | Service Manual - Page 150
service check Note: Except for the tray and pick tires, the envelope feeder option is a complete assembly with no other internal parts that can be replaced. If a 24x paper jam (x=envelope feeder) is displayed, go to "Envelope feeder" on page 2-77. The printer printer printer printer service printer - Lexmark C760 | Service Manual - Page 151
of envelopes being used. Has the tray been setup correctly? Check the tray for any signs of broken or damaged parts. Are there any signs of damage to the tray or parts in the tray? Yes Go to step 2 Go to step 3 Replace the envelope feeder tray No Install the tray correctly - Lexmark C760 | Service Manual - Page 152
detected for the Punch Motor x x x Error detected for the Stapler Motor x Error detected for the Belt Motor x x Error detected for the Tray Motor x x HCOF detects the front door is open x x x Error detected with the communications to the printer xx Error detected for the Offset Motor - Lexmark C760 | Service Manual - Page 153
5060-4xx Check Finisher displayed, unable to clear message Step 1 2 Action and questions Check for correct printer and finisher installation. Make sure the magnetic bracket is mounted on the printer. Is the magnetic bracket mounted? Is the pin on the magnetic bracket actuating the joint switch in - Lexmark C760 | Service Manual - Page 154
problem can be caused by a problem with the autoconnect system between the finisher and the printer. It also can be caused by a problem with the power printer through the communications cable. When the printer is powered of the printer. The power source the printer power source the printer printer - Lexmark C760 | Service Manual - Page 155
5060-4xx Step 10 Action and questions Check the voltage at J2-5 on the system board. The voltage measures approximately +5 V dc. Is the voltage correct? Front door is open, no indication on display Yes Replace the top options cable No Replace the system board Step Action and questions 1 Make - Lexmark C760 | Service Manual - Page 156
Empty the chad box. Check the voltages on CN5. The voltages read the following approximate values with the chad box empty: Connector pin Voltage CN5-1 +5 V dc +5 V dc supply CN5-2 +5 V dc sensor signal CN5-3 0 V dc is working correctly Replace the finisher system board 2-120 Service Manual - Lexmark C760 | Service Manual - Page 157
-sheet option service check HCIT system board LED error code table If a failure is detected by the system board, an error code may be displayed and use the following table to determine the problem. LED blinks 1 2 3 4 5 6 7 8 9 10 11 12 Problem Jam at registration sensor S2 Jam before the leading - Lexmark C760 | Service Manual - Page 158
dc Are the voltages correct? 5 Autoconnect cables - Check the autoconnect from the printer or option above the HCIT 2000-sheet option. Check for any signs of cuts, damage to the contacts in the connector. Are there any problems with the autoconnect cables? 6 HCIT autoconnect cable - Service Manual - Lexmark C760 | Service Manual - Page 159
proceeding with this service check make sure the 2000-sheet tray option is properly connected to AC power. • If a finisher is installed: The AC jumper should go from the HCIT to the finisher. The finisher AC power cord should attach to the AC voltage source. The base printer power cord should plug - Lexmark C760 | Service Manual - Page 160
sticking or broken parts. Is the Fuser assembly" on page 4-35. Is there still excessive noise from the fuser drive motor assembly? Yes Go to step 2 Replace the "Fuser drive assembly" on page 4-37 No Correctly install the "Fuser drive assembly" on page 4-37 Problem resolved. 2-124 Service Manual - Lexmark C760 | Service Manual - Page 161
panel LCD/status LED/buttons service check Use this service check to check both the operation assembly - Is the operator panel assembly completely blank and the power on status LED on? 6 Does the printer beep 5 times? Yes Go to step 2 Problem solved Replace the "Operator panel" on page 4-53 Go - Lexmark C760 | Service Manual - Page 162
? 12 Operator panel assembly - Does the operator panel display all diamonds, with the power on/status LED on and 5 beeps? 13 Voltage checks at system board connector J6 the operator panel cable Call your next level support Go to step 14 Go to "Operator panel" on page 4-53 and replace the - Lexmark C760 | Service Manual - Page 163
to service the unit. Step 1 Symptoms The printer does not that bin x is near full. 7 990 Service - Bin x Yes Go to "Printer does not recognize that one or more output Go to "For 990 Service Error Tray x, x=Tray 2, 3, 4 or 5, this is the tray that has a problem or needs service." on page 2-96 No - Lexmark C760 | Service Manual - Page 164
printer autoconnect connector Turn the power off and remove the output expander option from the printer and check the voltages on the base printer support No Go to step 2 Replace the sensor assembly. If this does not fix the problem replace the "System board" on page 4-72. 2-128 Service Manual - Lexmark C760 | Service Manual - Page 165
? Yes Go to step 2 Go to step 3 Replace the sensor No Install the cable correctly Call your next level support Replace the control board Problems with excessive static electricity buildup. Step 1 Action and Questions Excessive static electricity buildup. Front cover assembly - check the front - Lexmark C760 | Service Manual - Page 166
) designated as supplies or maintenance items, which are the responsibility of the customer. With the customer's permission, you may need to install an ITU, fuser assembly, second transfer roll, or print cartridge. Check the following before proceeding with any of the print quality service checks - Lexmark C760 | Service Manual - Page 167
, block the laser path between the printhead and cartridge for the color that is experiencing the full bleed issue. 2 Turn the printer off. Check 4 Problem solved Replace the "System board" on page 4-72. Replace the cartridge. Replace the "Cartridge contact assembly" on page 4-29. Problem resolved - Lexmark C760 | Service Manual - Page 168
ITU belt? 4 Turn off the printer. Check the cable connections between the transfer cartridge Go to step 3 Go to step 6 Problem resolved Replace the FRUs in the following order: 1. Cable 2. FTR spring. Replace the cartridge. Replace the "Cartridge contact assembly" on page 4-29. 2-132 Service Manual - Lexmark C760 | Service Manual - Page 169
or network administrator to check if the correct color driver is installed. Is the correct color driver installed Yes Change the setting to Color. No Go to step 2 Install the correct color driver. Go to "Black only retract (BOR) service check" on page 2-109. Light print over the entire page - Lexmark C760 | Service Manual - Page 170
"Print quality defect locator chart" on page 3-4 to determine the part to be replaced. For lines or marks appearing at random intervals, go to step 1. Step 1 Action and questions Are the horizontal marks or lines in a single color? Yes Replace the cartridge. No Go to step 2 2-134 Service Manual - Lexmark C760 | Service Manual - Page 171
persist? 4 Does the printer display an 83 ITU Maintenance message? Yes Replace the "Cartridge contact assembly for the failing color on page 4-29. Go to step 4 No Go to step 3 Problem solved Recommend the customer order the ITU maintenance kit. See "Scheduled maintenance" on page 6-4. Replace - Lexmark C760 | Service Manual - Page 172
setting to Low. Does this transfer setting fix the problem? Problem solved Problem solved No Inform the customer Go to step 4 Replace the "Fuser assembly" on page 4-35 Replace the "Second transfer roll" on page 4-71 Go to step 6 Replace the "Second transfer roll" on page 4-71 2-136 Service Manual - Lexmark C760 | Service Manual - Page 173
a new fuser CRU or a maintenance kit. • If only one color has a residual image problem, go to "Horizontal lines or streaks" on page 2-134. • If all colors have a residual image problem, go to "Residual image" on page 2-137. Uneven printing • If all colors have uneven print, replace the ITU assembly - Lexmark C760 | Service Manual - Page 174
, small pieces of plastic may drop off of a toner cartridge and be deposited on the ITU belt. Are there any debris in this location?' Yes Remove the debris Remove the debris No Go to step 2 Look for any signs of damage to the ITU belt. If found, replace the ITU assembly. 2-138 Service Manual - Lexmark C760 | Service Manual - Page 175
printer for current media type and go to step 2 Problem solved Problem solved No Go to step 3 Go to step 3 Replace the "Fuser assembly" on page 4-35 Light lines or streaks appear on the page Single color streaks outside the printed page are most likely caused by a problem in the print cartridge - Lexmark C760 | Service Manual - Page 176
roll, again. Does the media wrap around the second transfer roll, again? Yes Remove the piece of media and go to step 2. No Problem solved Replace the second transfer roll. If this does not fix the problem, call your next level of support for assistance. Problem solved 2-140 Service Manual - Lexmark C760 | Service Manual - Page 177
part of the maintenance kit and should be replaced when a "83 ITU Maintenance" message appears. Ask the customer if they have replaced the second transfer roll recently. Note: If any of the following problems occur, go to "Print quality service check" on page 2-130: • A problem with only one color - Lexmark C760 | Service Manual - Page 178
does not correct the problem, contact your next level support. No Replace the FRUs in order: 1)"Transfer HVPS board" on page 4-73 2) "Second transfer roll" on page 4-71 3)"ITU assembly" on page 4-44 Tray 1 service check Tray 1 does not stay seated or fit correctly in the printer, the media fails - Lexmark C760 | Service Manual - Page 179
size sensing service check The printer does not sense the size of the media installed in Tray 1. Note: If there is a problem when installing of the internal tray 1 paper tray. Does this fix the problem? 4 Check tray 1 for broken parts, especially the teeth on the back restraint. Is the back - Lexmark C760 | Service Manual - Page 180
5060-4xx 2-144 Service Manual - Lexmark C760 | Service Manual - Page 181
identify problems with the printer. Diagnostic aids Printhead diagnostics See "Printheads" on page 7-13 for the part number. If you get a printhead error, Select which pair of printheads to use based on the error code. If the printer displays the codes that indicate yellow or cyan, use the tool to - Lexmark C760 | Service Manual - Page 182
printhead cables from the system board in the printer and connect them to the printhead diagnostic tool. c. Connect the printhead diagnostic tool cables to the connectors on the system board in the printer. This reverses the printhead color signals for the selected pair of colors. 3-2 Service Manual - Lexmark C760 | Service Manual - Page 183
should be checked. Press Go to clear the error. • If the error code remains the same, replace the system board. If that solves the problem, you are finished. • If the printer displays a different printhead error code, which indicates another color, the printhead or the printhead cables are defective - Lexmark C760 | Service Manual - Page 184
PC drum PC cleaner Developer roll TAR Toner meter Cart auger First transfer roll Second transfer roll ITM drive roll ITM reverse roll Fuser hot roll Fuser BUR Metering rolls Color charge roll short Component Cartridge ITU Second transfer roll ITU ITU Fuser Reference Edge C, M, or Y cart Planes - Lexmark C760 | Service Manual - Page 185
5060-4xx Printing the chart The printer has an internal copy of the defect locator chart under the Print quality For a transparency of the defect locator chart, go to the back of the hard copy service manual. Note: If you want to copy the chart, then the following should be observed. Since fax - Lexmark C760 | Service Manual - Page 186
the printer off. 2. Remove all cartridges and the ITU. color plane is not printing. Note: The third page is particularly important since it is the image on the belt toner cartridges and set them face down. Look at the surface of each toner cartridge and check for a developed image. 3-6 Service Manual - Lexmark C760 | Service Manual - Page 187
the bell crank circuit - Turn the printer off. Using a multimeter, check the continuity between the rear bell crank contact for the failing color and the respective cable on the transfer HVPS board. See "Transfer high voltage power supply (HVPS)" on page 5-20. • Transfer HVPS cable - Make sure that - Lexmark C760 | Service Manual - Page 188
configure a printer for operation. Note: An asterisk(*) in the value list in the following menus indicates the default value. The following are available from the Configuration Menu: ITU Cnt Value Fuser Cnt Value Reset Fuser Cnt Prt Quality Pgs (This is not displayed if in Demo mode.) Color Trapping - Lexmark C760 | Service Manual - Page 189
when a page is printed and incremented by two when a duplex sheet is printed. The counter can be used to track printer usage. When the counter reaches 200,000, the printer posts a fuser maintenance message on the operator panel. 1. Select Reset Fuser Cnt in the Config Menu to view the page count - Lexmark C760 | Service Manual - Page 190
or Deactivate. Demo Mode This printer supports a demo mode that is usually used in retail environments to illustrate the features of the printer. The printer features are illustrated by demonstration : Restore Network is only listed on models that have integrated network support. 3-10 Service Manual - Lexmark C760 | Service Manual - Page 191
If the printer detects a new or different color cartridge is installed, usually at power on or when the cover is closed. • If the printer detects a new or different ITU is installed, usually at power on or when the cover is closed. • If the fuser detects at power on that the fuser temperature is at - Lexmark C760 | Service Manual - Page 192
Select Paper Prompts from the Config Menu. 2. Select Auto, MP Feeder, or Manual Paper. Env Prompts Env Prompts controls which tray a change prompt is directed to when Feeder, or Manual Envelope. Exit Config Menu Press Select to exit the Configuration Menu and reboot the printer. 3-12 Service Manual - Lexmark C760 | Service Manual - Page 193
FINE MARGIN ADJ MISC TESTS PRINT TESTS HARDWARE TESTS DUPLEX TESTS (if installed) INPUT TRAY TESTS OUTPUT BIN TESTS FINISHER TESTS (if installed) BASE SENSOR TEST DEVICE TESTS (if optional flash or disk installed) PRINTER SETUP EP SETUP ERROR LOG DEV MENU EXIT DIAGNOSTICS Entering Diagnostics mode - Lexmark C760 | Service Manual - Page 194
the black image on the page. Use ALIGHNMENT to align the individual colors. The black image should be aligned before the individual colors are aligned. To set Registration: 1. Select REGISTRATION from the Diagnostics and Right margins, first, then adjust the Bottom and Left. 3-14 Service Manual - Lexmark C760 | Service Manual - Page 195
be printed on A4 or Letter paper. The printer tries to print the test page from the default paper source, however if the default source only supports envelopes, then the page prints from Tray 1. 4. Determine which settings to change and follow the instructions on the printed sheets to determine the - Lexmark C760 | Service Manual - Page 196
is correct, go to step 3. 3. Replace the appropriate thermistor assembly. If this does not fix the problem, replace the system board. To exit the test, press Return or Stop. TOP FINE MARGIN ADJ Do not change this setting without consulting your next level of support. 3-16 Service Manual - Lexmark C760 | Service Manual - Page 197
of a paper size sensing board. This test must also be performed anytime the ITU motor, fuser motor, or cartridge drive motors are replaced. To run the Motor Detect: 1. Remove all the print cartridges from the printer and close the cover. 2. Select Motor Detect from MISC TESTS. 3. Press Go. Motor - Lexmark C760 | Service Manual - Page 198
front. Refer to the instructions included with the shim for installation. 4. After installing the shim, run the test, again. If the test fails, rerun several times as the belt needs time to stabilize. Once the test is successful, reinstall the cartridges and restart the printer. Printhead Inst The - Lexmark C760 | Service Manual - Page 199
appendix page B-3. Print Tests (input sources) This test determines if the printer can print on media from any of the paper input sources. Each Print Test page always prints single sided, regardless of the Duplex setting or the presence of the Duplex option. To run the Print Test: 1. Select PRINT - Lexmark C760 | Service Manual - Page 200
a CL (Closed) displays in place of OP. The proper operation of each button can be checked. 3. Press Return or Stop to cancel the test. 3-20 Service Manual - Lexmark C760 | Service Manual - Page 201
read correctly. To run the DRAM Test: 1. Select DRAM Test from HARDWARE TESTS in the Diagnostics mode. The power the power indicator turns on solid, and the final results appear. If the test fails, SDRAM Error appears for the printer and the following screen is displayed: Resetting the Printer - Lexmark C760 | Service Manual - Page 202
Error Clear Autofeed Rise Error False Autofeed Rise Error Autofeed Falling Interrupt Error Clear Autofeed Fall Error Once the maximum count is reached the test stops, the power indicator goes on solid and the final results are display. Press Return or Stop to exit the test. 3-22 Service Manual - Lexmark C760 | Service Manual - Page 203
Error Receive Data Ready Error Break Interrupt Error Framing Error Parity Error Overrun Error Data Error Data 232 Error Data 422 Error FIFO Error DSR Error DSR PIO Error DSR Interrupt Error CTS Error CTS PIO Error CTS Interrupt Error Once the maximum count is reached the test stops. The power - Lexmark C760 | Service Manual - Page 204
in the Diagnostics mode. 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 page is printed from Tray 1. • Check the Quick - Lexmark C760 | Service Manual - Page 205
cartridge, cannot be opened during the feed test. To observe the paper path, you must open the lower front door, used to access the paper jams on the vacuum transport belt. Blank pages feed during the test. Note: This test can run using any of the paper or envelope sizes supported by the printer - Lexmark C760 | Service Manual - Page 206
mode. 2. Select the output bin you want the paper to exit into. All output bins installed on the printer are shown on the feed test menu. 3. Select either Single (one sheet of media feeds to the selected available. The test runs continuously until Return or Stop is pressed. 3-26 Service Manual - Lexmark C760 | Service Manual - Page 207
following output sources, if installed, are supported by this test. Standard Bin Output Expander full. 3. Once the selection is displayed you can manually actuate the sensor you want to test. When test checks all of the diverters installed on the printer. When the test is selected from OUTPUT BIN - Lexmark C760 | Service Manual - Page 208
the Diagnostics menu. The printer feeds eight pieces of media test is complete, the printer returns to the original screen from the menu. The printer feeds eight pieces of media test is complete the printer returns to the original is displayed you can manually actuate each of the sensors. When - Lexmark C760 | Service Manual - Page 209
S6=OP S5 =Exit Timing Sensor Once the screen is displayed you can manually actuate the sensor. When the sensor is closed, CL is displayed, limit switches S2 =Paper surface sensor Once the screen is displayed you can manually actuate the sensor. When the sensor is closed, CL is displayed, when - Lexmark C760 | Service Manual - Page 210
using this test: Input S1 Input S2 In-Line Media Fuser exit sensor K TMC sensor (black) C TMC sensor (cyan) M TMC sensor (magenta) Y TMC sensor (yellow) See "Printer sensors" on page 5-3 for locations for these sensors. See "Cartridge contact assembly pin locations (cyan, magenta and yellow)" on - Lexmark C760 | Service Manual - Page 211
be lost/Go or Stop? is displayed to warn the user. 2. To exit the test immediately and return to DEVICE the number of bad blocks found. 3. The power indicator blinks during the test. The test can be Test This test causes the file system to write and read data on the flash to test the flash. Warning - Lexmark C760 | Service Manual - Page 212
PPDS code page Universal units of measure US value Letter 10 Envelope Letter PC-8 437 Inches Non-US value A4 DL Envelope A4 PC-850 850 Millimeters Warning: Modification of the printer setting Defaults causes the NVRAM space to be restored to the printer's factory settings. PAGE COUNTS Color Page - Lexmark C760 | Service Manual - Page 213
the model name. Configuration ID Warning: Should not be changed without specific instructions from the next level support. The configuration ID is used to communicate characteristics of certain areas of the printer that cannot be determined by hardware sensors. The configuration ID is originally - Lexmark C760 | Service Manual - Page 214
Cal Ref Adj Warning: Should not be changed without specific instructions from the next level support. EP SETUP EP Defaults Fuser Temp DC Charge Adjustment Dev Bias Adj Transfer Adjust EP Defaults The EP Defaults is used to restore each of the printer settings contained in the EP Setup menu to their - Lexmark C760 | Service Manual - Page 215
report to a specific printer. The printout of the log contains the following information for each error in the log: • Page count when the error occurred (except for 900 service RIP software errors). • Code versions of all packages when error occurred. • Panel display when error occurred (except for - Lexmark C760 | Service Manual - Page 216
is selected, the Empty Error Log displays on the screen Input Tray) without removing any option or the base printer mounted above the optional HCIT. Note: During normal operation the test you want to run. 2. Turn the HCIT power off by moving the LVPS slide switch to the left position Service Manual - Lexmark C760 | Service Manual - Page 217
to electrostatic discharge (ESD). To prevent damage to ESD-sensitive parts, use the following instructions 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 - Lexmark C760 | Service Manual - Page 218
printer. Pay careful attention to each screw type location when doing removals. You must install the correct screw type in each location during reassembly. Reference number 002 Screw type 4-40 Machine Location Parallel connector to shield Purpose Qty Attach 2 102 M3.5x8 mm Cartridge guides - Lexmark C760 | Service Manual - Page 219
to terminal (BOR/ITU) yellow Attach 1 Thermistor to printheads Attach 8 Guides to V-blocks Attach 8 323 M3.5x8 mm Frame support back plate to lower frame Attach 2 Plastite Thread Forming Door latch catch to frame Attach 2 Transfer HVPS to lower frame Mounting 2 Fuser top duct to - Lexmark C760 | Service Manual - Page 220
(redrive) Mounting 2 Developer HVPS to cartridge contact asm Mounting 4 BOR drive asm to upper frame Mounting 1 ITU drive asm to lower frame Mounting 3 Fuser drive asm to lower frame Mounting 4 Vacuum top duct to lower frame Mounting 2 Toner shield to lower frame Attach 4 Upper - Lexmark C760 | Service Manual - Page 221
left light shield to left upper cover asm Attach 1 and top cover Front right light shield to right front cover Attach 1 support and top cover Cartridge drive assemblies to upper frame Mounting 12 Upper door hinges to upper frame (redrive) Attach 2 Inner redrive assembly to upper frame - Lexmark C760 | Service Manual - Page 222
the paper path, or restricting mechanical movement. Top cover assembly Go to "Top cover assembly" on page 7-3 for part number. 1. Remove the redrive cap. 2. Remove the right light shield screw (A) type "324" on page 4-5 and screw (B) "323" on page 4-3. Also release (C). 4-6 Service Manual - Lexmark C760 | Service Manual - Page 223
3. Remove the right light shield. 4. Unsnap the bottom of the operator panel bezel and remove. 5060-4xx 5. Remove the top cover mounting screws (D) from the front of the printer. Repair information 4-7 - Lexmark C760 | Service Manual - Page 224
5060-4xx 6. Remove the top cover screws (E) type "323" on page 4-4 from the rear of the printer. 7. Open the MPF and remove the top cover screw (F) type "323" on page 4-4 from the left side of the printer. 8. Remove four screws (G) holding the outer system board shield. 4-8 Service Manual - Lexmark C760 | Service Manual - Page 225
5060-4xx 9. Disconnect the cable from J2 (H) on the system board and pull the cable through the inner system board shield. 10. Remove the top cover. Repair information 4-9 - Lexmark C760 | Service Manual - Page 226
5060-4xx Front lower left cover Go to "Front lower left cover" on page 7-3 for part numbers. 1. Remove the paper tray. 2. Open the front cover. 3. Open the paper path access door and carefully paper path access door. 5. Remove the screw (C) in the front left handle cover assembly. 4-10 Service Manual - Lexmark C760 | Service Manual - Page 227
path access door cover Go to "Paper path access door" on page 7-3 for part numbers. 1. Remove the front lower left cover. See "Front lower left cover cover assembly Go to "Front left handle cover assembly" on page 7-3 for part number. 1. Remove the front lower left cover. See "Front lower left cover - Lexmark C760 | Service Manual - Page 228
in place. The spring loaded latch is difficult to reassemble. Avoid unlatching the left side, if you just need access to the right screw. 4-12 Service Manual - Lexmark C760 | Service Manual - Page 229
lower right cover. 5060-4xx 6. Remove the assembly. Front right handle cover assembly Go to "Front right handle cover assembly" on page 7-3 for part number. 1. Open the front cover. 2. Remove the four front right handle cover assembly screws (A) type "323" on page 4-3 and the screw (B) from the - Lexmark C760 | Service Manual - Page 230
5060-4xx Front cover assembly Go to "Front cover assembly" on page 7-3 for part number. 1. Open the front cover assembly. 2. Remove the detent post tension spring (A). A 3. Unsnap the bottom of the operator panel bezel and remove. 4-14 Service Manual - Lexmark C760 | Service Manual - Page 231
4. Hold the front cover and remove the two screws (B) from the upper front pivot cover. 5060-4xx 5. Remove the front cover assembly. Repair information 4-15 - Lexmark C760 | Service Manual - Page 232
5060-4xx Rear cover Go to "Rear cover" on page 7-5 for part number. 1. Remove the outer system board shield. See "Outer system board shield" on page 4-54. 2. Remove 12 rear cover screws (A) type "232" on page 4-3 and type "323" on page 4-3. 3. Open MPF door. 4-16 Service Manual - Lexmark C760 | Service Manual - Page 233
4. Remove two screws (B). 5. Remove tabs (C) from slots (D). 5060-4xx 6. Remove the rear cover. Note: Make sure the toroid (E) is positioned at the edge of the inner system board shield. Repair information 4-17 - Lexmark C760 | Service Manual - Page 234
assembly Go to "Lower right door assembly" on page 7-3 for part number. 1. Open the lower right door assembly. 2. Remove the (A). 4. Remove the lower right door assembly. Left lower cover See "Fuser assembly" on page 7-7 for part numbers 1. Remove the lower jam access door assembly. See "Lower jam - Lexmark C760 | Service Manual - Page 235
jam access door assembly screws (A) type "323" on page 4-3 and remove the door. A(323) Redrive door Go to "Redrive door assembly" on page 7-14 for part number. 1. Open the redrive door. 2. Loosen the redrive door upper hinge screw (A) type "324" on page 4-5. 3. Lift the redrive door from the hinge - Lexmark C760 | Service Manual - Page 236
Remove the ITU assembly. See "ITU assembly" on page 4-44. 2. Remove tray 1. 3. Remove the transfer plate. Lifting and rotating the right edge of the plate up to a 45° angle releases the transfer plate. Remove the grounding strap (A) attached to the bottom of the transfer plate. A 4-20 Service Manual - Lexmark C760 | Service Manual - Page 237
4. Remove the black mylar piece by removing the two screws (B) or cutting the cable tie. 5060-4xx B 5. Remove the front lower left cover. See "Front lower left cover" on page 4-10. 6. Remove the three screws (C) type "323" on page 4-3 to remove the front left handle cover assembly. 7. Remove the - Lexmark C760 | Service Manual - Page 238
sensor. There are two screws located under the back VTB belt. Remove both of them along with a third that is located at the rear pivot point for the transfer plate (F). This allows the paper level assembly to drop the paper level sensor assembly. Left Side View F F Front View 4-22 Service Manual - Lexmark C760 | Service Manual - Page 239
5060-4xx Paper Level Sensor 10. Disconnect the pick motor connector (G). Repair information 4-23 - Lexmark C760 | Service Manual - Page 240
5060-4xx 11. Remove four screws (H) holding the pick assembly in place. 12. Push the bellcrank (I) in to allow the pick arm to fall to the bottom of the tray. I 4-24 Service Manual - Lexmark C760 | Service Manual - Page 241
5060-4xx 13. Disconnect the spring clip (J) from the pick arm. Be sure not to let the spring come off of the lower frame. Also identify which pegs the spring clip is sitting on. These pegs are typically marked with white paint. 14. Leaving the pick arm down, lift the pick assembly and slide it - Lexmark C760 | Service Manual - Page 242
5060-4xx 15. Put the new pick assembly into the printer. Make sure the pick motor connector is placed through the holes before you insert the brackets. Make sure the boss assembly toward the front of the machine until the half moon on the bracket is against the locator pin (L). L 4-26 Service Manual - Lexmark C760 | Service Manual - Page 243
makes it easier to put in the rest of the screws. When starting the front screw, push the pick assembly towards the front of the printer. 19. Reconnect the connectors. 20. Reattach the paper lever sensor (three screws). 21. Position the mylar piece using two screws or one cable tie. When - Lexmark C760 | Service Manual - Page 244
5060-4xx BOR drive assembly See "Motor assembly, Lift/BOR" on page 7-27 for part numbers. 1. Open the front cover. 2. Remove the yellow toner cartridge. 3. Remove the front right light shield cover. See "Front right light shield" on page 4-34. 4. Remove the BOR housing assembly screw (A) type "323" - Lexmark C760 | Service Manual - Page 245
contact assembly" on page 7-28 for part numbers. Warning: Do not remove printheads. 1. Open the front cover. 2. Remove the toner cartridges. 3. Remove the ITU assembly. See "ITU assembly" on page 4-44. 4. Remove the top cover assembly. See "Top cover assembly" on page 4-6. 5. Remove the developer - Lexmark C760 | Service Manual - Page 246
for part number. 1. Remove inner system board shield. See "Inner system board shield" on page 4-43. 2. Remove the cartridge drive assembly mounting screws (A). Black is shown. 3. Disconnect the cable (B) from the cartridge drive assembly. 4. Remove the cartridge drive assembly. 4-30 Service Manual - Lexmark C760 | Service Manual - Page 247
5060-4xx Developer HVPS board Go to "Developer HVPS board" on page 7-34 for part numbers. 1. Remove inner system board shield. See "Inner system board shield" on page 4-43. 2. Remove four top machine screws (A) type "323" on page 4-3 and four - Lexmark C760 | Service Manual - Page 248
and magenta sensors. See "BASE SENSOR TEST" on page 3-30. If a sensor fails the test, realign the developer HVPS boards and rerun the test. 4-32 Service Manual - Lexmark C760 | Service Manual - Page 249
Friction buckler Go to "Friction buckler" on page 7-19 for part numbers 1. Press the multipurpose feeder (MPF) latch to disconnect the MPF. 2. Use needlenose pliers to remove the buckler housing (A). 5060-4xx 3. Replace the friction buckler (B). Repair information 4-33 - Lexmark C760 | Service Manual - Page 250
5060-4xx Front right light shield Go to "Front right light shield cover" on page 7-3 for part numbers 1. Open the top cover. 2. Remove the front right light shield screws (A) and (B). 3. Unlatch the alignment stud (C). 4-34 Service Manual - Lexmark C760 | Service Manual - Page 251
Fuser assembly CAUTION: Be sure the fuser assembly has cooled before you remove it. Go to "Fuser assembly" on page 7-7 for part numbers. 1. Open the lower right door assembly and redrive door. 2. Unlatch the two fuser latches (A). 3. Remove the fuser assembly. 5060-4xx A Repair information 4-35 - Lexmark C760 | Service Manual - Page 252
Fuser bottom duct" on page 7-5 for part number. 1. Remove the fuser assembly. See "Fuser assembly" on page 4-35. 2. Remove the fuser top duct. See "Fuser top duct" on page 4-39. 3. Remove the redrive belt cover duct (A). 4. Remove fuser left duct (B). 5. Remove fuser bottom duct. 4-36 Service Manual - Lexmark C760 | Service Manual - Page 253
on page 4-36. 2. Swing lever (A) and disengage VTB shaft. 3. Remove the fuser drive assembly screws (A) type "323" on page 4-3 and remove the assembly. Fuser drive card assembly Go to "Card assembly - fuser drive" on page 7-10 for part number. 1. Remove the rear cover. See "Rear cover" on page 4-16 - Lexmark C760 | Service Manual - Page 254
5060-4xx Fuser fan Go to "Fuser fan assembly with cable" on page 7-35 for part number. 1. Remove rear cover. See "Rear cover" on page 4-16. 2. Disconnect the fuser fan cable from connector J31 on the system board. 3. Remove the fuser fan screws (A) and remove the fan. 4-38 Service Manual - Lexmark C760 | Service Manual - Page 255
Fuser top duct Go to "Fuser top duct" on page 7-5 for part number. 1. Remove the rear cover. See "Rear cover" on page 4-16. 2. Remove the fuser top duct screw (B) and disconnect tab (A). 3. Remove the top duct. 5060-4xx Repair information 4-39 - Lexmark C760 | Service Manual - Page 256
and card See "Fuser assembly" on page 7-7. 1. Open the front cover. 2. Remove the yellow print cartridge. 3. Remove the front lower right cover. See "Front lower right cover" on page 4-12. 4. Remove screw (A) from the top front support bracket. Swing bracket to the right. 4-40 Service Manual - Lexmark C760 | Service Manual - Page 257
5. Remove screws (B) for motor and screws (C) for the web oiler card. 5060-4xx 6. Remove the fuser web oiler motor assembly and card. Repair information 4-41 - Lexmark C760 | Service Manual - Page 258
: Make sure the cables from the drive assembly are routed along the lower frame and are not in contact with the drive assembly gears. 4-42 Service Manual - Lexmark C760 | Service Manual - Page 259
board shield assembly with clips" on page 7-33 for part number. 1. Remove the top cover assembly. See "Top cover assembly" on page 4-6. 2. Remove the rear cover. See "Rear cover" on page 4-16. 3. Remove the transfer HVPS board. See "Transfer HVPS board" on page 4-73. 4. Remove the system board - Lexmark C760 | Service Manual - Page 260
printer. ITU drive assembly Go to "ITU drive assembly with motor and waste toner full switch" on page 7-41 for part number. 1. Remove the black cartridge drive assembly. See the removal for the "Cartridge drive assembly" on page 4-30. 2. Disconnect the ITU drive coupling cable (A). A 4-44 Service - Lexmark C760 | Service Manual - Page 261
you as you rotate the top of the assembly out of the printer. Be careful not to damage the large drive gear as you remove the ITU drive assembly. ITU drive motor Go to "ITU drive motor assembly" on page 7-23 for part number. 1. Remove the black cartridge drive assembly. See the removal for the - Lexmark C760 | Service Manual - Page 262
7-31 for part number. Note: Set the voltage range switch to the proper power setting for the geographic area you are in. 1. Remove the fuser drive assembly. See "Fuser drive assembly 4-2 from the rear of the printer. 5. Remove the right rear cover screw (B) type "121" on page 4-2. 4-46 Service Manual - Lexmark C760 | Service Manual - Page 263
screw (C) type "121" on page 4-2 from the top of the LVPS and remove the LVPS from the printer. Installation notes • When installing the new power supply, set the voltage range switch to the proper power setting for the geographic area you are in. • Be sure to set the voltage range selector switch - Lexmark C760 | Service Manual - Page 264
-4xx Multipurpose feeder (MPF) Go to "Multipurpose feeder (MPF)" on page 7-19 for part numbers. 1. Open the MPF to the lowest position. 2. Remove the MPF cable cover screw (A). 3. Place flatblade screwdriver in the slot (B) on the MPF cable cover and gently pry open the cover. 4-48 Service Manual - Lexmark C760 | Service Manual - Page 265
4. Disconnect the MPF switch cable from the MPF sensor (C). 5. Pull the MPF cable free of the enclosure and out from under the cable retainer (D). 5060-4xx 6. Remove the MPF strap screw (E) type "412" on page 4-5. Repair information 4-49 - Lexmark C760 | Service Manual - Page 266
on page 4-18. 2. Remove waste toner container. 3. Reinsert paper tray into printer. 4. Remove the broken pieces of old handle. a. Pull up the upper piece of handle to raise the nip relief link (A) and rotate upper piece of handle 90° clockwise to free it from the nip relief link. 4-50 Service Manual - Lexmark C760 | Service Manual - Page 267
5060-4xx b. Pull down the lower portion of the broken handle as far as it goes. Rotate the handle to slide off the post. Installation notes 1. Rotate the new nip relief handle into place to connect it to the nip relief link (A). 2. Using a screwdriver, gently pry the nip relief lever (B) toward the - Lexmark C760 | Service Manual - Page 268
and rotate the handle into its home position. This seats the nip relief lever into the correct position. 5. Check for proper operation 6. Install the waste toner container. 7. Replace the covers. 4-52 Service Manual - Lexmark C760 | Service Manual - Page 269
Operator panel Go to "Operator panel assembly" on page 7-3 for the part number. 1. Open the front cover assembly. 2. Unsnap the bottom of the operator panel bezel and remove. 5060-4xx 3. Unlatch the operator panel latches (A). Repair information 4-53 - Lexmark C760 | Service Manual - Page 270
5060-4xx 4. Disconnect the operator panel cable from the operator panel and remove the panel. Outer system board shield Go to "System board outer shield" on page 7-33 for part number. 1. Remove four screws (A). 2. Remove outer system board shield. 4-54 Service Manual - Lexmark C760 | Service Manual - Page 271
" on page 7-16 for part numbers associated with this assembly. 1. Enter Diagnostics mode. Power up the printer in Diagnostics mode (holding Go 3. Turn the printer off. 4. Remove the inner system board shield. See "Inner system board shield" on page 4-43. 5. Open the waste toner container door and - Lexmark C760 | Service Manual - Page 272
(G). This also occurs when replacing the assembly. Replacing the paper size sensing assembly 1. Press on the back of the paper size sensing assembly fingers (H). 4-56 Service Manual - Lexmark C760 | Service Manual - Page 273
up. 5. Reinstall the ground screw, inner system board shield, waste toner container, outer system board shield, and the covers. Paper size sensing Detect" on page 3-17. Go to "Paper size sensing" on page 7-16 for part number. 1. Print the Quality Test Pages. See "Prt Quality Pgs" on page 3-9. - Lexmark C760 | Service Manual - Page 274
during detection and the test completes automatically. 5. Turn off the printer. 6. Replace the print cartridges. 7. Power up the printer in Diagnostics mode (holding Go and Return until Performing Self Test appears MENU" on page 3-15. Refer to settings on the Quick Test Page. 4-58 Service Manual - Lexmark C760 | Service Manual - Page 275
Pick rolls Go to "Pick roll tires" on page 7-53 for part number. Front roll 1. Wipe any toner or debris from the bottom pan to avoid contaminating the pick rolls. 2. Pull the pick assembly down into the bottom pan and remove the screw. - Lexmark C760 | Service Manual - Page 276
5060-4xx Printhead removal and adjustments Identifying the printheads A color version of this sheet is available in the appendix. See"Identifying the printheads" on page protective lens cover on the new printhead, it must be removed before installing the replacement printhead. 4-60 Service Manual - Lexmark C760 | Service Manual - Page 277
another in the rear (see Figure 2 and Figure 3), by aligning the locating pin on the printhead alignment bracket (see Figure 1) with the hole in the printer frame. 2. Attach the printhead alignment tool with the provided screw. Thumbwheel Bracket Figure 1 Locating pin Repair information 4-61 - Lexmark C760 | Service Manual - Page 278
through the printhead spacer located at the right rear of the printer frame. 5. Bias the new printhead assembly against the front color of the printhead that was replaced, and set the Z value to zero. Exit Alignment menu. 10. Select Miscellaneous Test and Printhead Inst Alignment. 4-62 Service Manual - Lexmark C760 | Service Manual - Page 279
11. Print the Printhead Mechanical Alignment Test page to determine the printhead alignment. Note: To see a printhead mechanical alignment test in color page, see "Printhead mechanical alignment test page" on page B-9. 12. Loosen the printhead screws before making any adjustments to the thumbwheel - Lexmark C760 | Service Manual - Page 280
Rear bellcrank (cyan, magenta, yellow) 1. Power off the printer. 2. Remove the four toner cartridges and leave the front door open. 3. Remove the ITU assembly. See "ITU assembly" on page 4-44. 4. Check each of the rear bellcranks for cracks or breakage. 5. Remove the spring (A). 4-64 Service Manual - Lexmark C760 | Service Manual - Page 281
down (B) and remove. Be careful not to lose the contact spring (C). Installation note Replace the bellcranks by reversing the order of removal. Note: Test the color coverage by running the Print Quality Pages in the Diagnostics or Configuration Menu. Repair information 4-65 - Lexmark C760 | Service Manual - Page 282
5060-4xx Rear bellcrank (black) 1. Power off the printer. 2. Remove the four toner cartridges and leave the front door open. 3. Remove the ITU assembly. See "ITU assembly" on page 4-44. 4. Check each of the rear bellcranks for cracks or breakage. 5. Remove the spring. 6. Remove the stop screw (A) - Lexmark C760 | Service Manual - Page 283
bellcrank down (C) and remove. Be careful not to lose the spring (D). Installation note Replace the bellcranks by using reverse order of removal. Note: Test the color coverage by running the Print Quality Pages in the Diagnostics or Configuration Menu. Repair information 4-67 - Lexmark C760 | Service Manual - Page 284
4-36. 3. Remove the redrive assembly screw (A) type "323" on page 4-3. A(323) 4. Remove the drive belt (B) from the lower redrive pulley. 5. Remove the redrive assembly. Note: When you reinstall the redrive assembly be sure to align the notch in the redrive assembly with tab (C). 4-68 Service Manual - Lexmark C760 | Service Manual - Page 285
the registration motor mounting screws (B), cut the cable tie (A), and remove the assembly. RIP fan Go to "RIP fan, 92 mm" on page 7-35 for part number. 1. Remove the rear cover. See "Rear cover" on page 4-16. 2. Remove the two rip fan rear screws (A). 3. Remove the front rip fan screw - Lexmark C760 | Service Manual - Page 286
Use the following diagram as a guide. Installation notes • When replacing the cable tie (A), make sure the tape on the cable protects the cable at the opening in the frame (B) and is not pinched or obstructs the MPF door. • Make sure the cable at point C is clear of sharp edges. 4-70 Service Manual - Lexmark C760 | Service Manual - Page 287
media/transparency/multipurpose feeder sensors Replace only the necessary sensors. 5060-4xx Second transfer roll Go to "Second transfer roll" on page 7-12 for part number. 1. Remove the ITU assembly. See "ITU assembly" on page 4-44. 2. Lift the transfer roll from the front bearing and remove the - Lexmark C760 | Service Manual - Page 288
. To verify the output options are recognized: 1. At the Ready prompt, select Paper Menu. 2. Select Output Bin. 3. Make sure all installed options are listed. 4-72 Service Manual - Lexmark C760 | Service Manual - Page 289
Transfer HVPS board Go to "Transfer HVPS board" on page 7-34 for part number. 1. Remove the rear cover. See "Rear cover" on page 4-16. 2. Remove three transfer HVPS board screws (A). 5060-4xx A(232) A(323) Repair information 4-73 - Lexmark C760 | Service Manual - Page 290
5060-4xx 3. Remove all connectors (B). 4. Remove the transfer HVPS board. 4-74 Service Manual - Lexmark C760 | Service Manual - Page 291
notes • To identify the color coded cable bands to the connectors, see "Transfer high voltage power supply (HVPS)" on page 5-20. • When installing the transfer HVPS board, route the cable to the HVPS input connector at CN1 (C) over the cable to the yellow transfer contact (D), under the cable - Lexmark C760 | Service Manual - Page 292
feeder cable" on page 4-70. 2. Remove the transfer plate. Lifting and rotating the right edge of the plate up to a 45° angle releases the transfer plate. Remove the grounding strap (A) attached to the bottom of the transfer plate. A 3. Remove the transfer plate assembly. 4-76 Service Manual - Lexmark C760 | Service Manual - Page 293
belt (VTB) Go to "Vacuum transport belt assembly" on page 7-11 for part number. 1. Remove the transfer plate assembly. See "Transfer plate assembly" on page 4-76. 2. Remove the fuser bottom duct. See "Fuser bottom duct" on page 4-36. 3. Remove the two front screws (A). 5060-4xx 4. Loosen belt - Lexmark C760 | Service Manual - Page 294
5060-4xx 6. Rotate release lever on gear until the gear can be removed. 7. Remove screw from ground wire. 8. Remove vacuum belt transfer belt unit far enough to release ground wire from restraint clips and remove completly. 4-78 Service Manual - Lexmark C760 | Service Manual - Page 295
Vacuum transport belt (VTB) fan Go to "VTB fan, 60 mm" on page 7-35 for part number. 1. Disconnect VTB fan from the system board. 2. Remove VTB fan with a flatblade screwdriver. 5060-4xx Waste container door Go to "Waste container door" on page 7-5 for part number. 1. Open the waste container door - Lexmark C760 | Service Manual - Page 296
the desired value is displayed and press Select. When the last (rightmost digit) is changed and Select is pressed, the new value is set. The printer automatically begins POR. 5. Turn the printer off. 6. Open the fuser access cover. 4-80 Service Manual - Lexmark C760 | Service Manual - Page 297
7. Unlatch the two fuser latches (A). 5060-4xx A 8. Remove the fuser assembly. 9. Open the front cover. 10. Remove the yellow print cartridge. 11. Remove the front right light shield screws (B) and (C) and remove the light shield. B(323) C(324) Repair information 4-81 - Lexmark C760 | Service Manual - Page 298
, to help hold the door in place. 14. Remove the front right handle cover assembly screws (F) and remove the assembly. 15. Open paper tray. 4-82 Service Manual - Lexmark C760 | Service Manual - Page 299
16. Remove screw (G) from the top front support bracket. Swing bracket to the right. 5060-4xx 17. Use the alignment pins (H) on the web oiler fuser motor assembly to position the assembly in holes (J) and install the assembly. Repair information 4-83 - Lexmark C760 | Service Manual - Page 300
5060-4xx 18. Secure the web oiler motor assembly with screws (K). K 19. Install the web oiler card using screws (L). L 4-84 Service Manual - Lexmark C760 | Service Manual - Page 301
5060-4xx 20. Plug web oiler cable into web oiler card connector (M). Plug web oiler drive assembly cable into cable connector (N). Note: Make sure the cables from the drive assembly are routed along the lower frame and are not in contact with the drive assembly gears. M N 21. Reinstall paper path - Lexmark C760 | Service Manual - Page 302
light shield up until alignment stud (P) and the screw hole (Q) are aligned. Q P 24. Attach the new fuser web oiler fuser housing (R) to the new web oiler fuser. R 25. Insert the web oiler fuser assembly into the fuser assembly and install the fuser assembly into the printer. 4-86 Service Manual - Lexmark C760 | Service Manual - Page 303
5. Connector locations Locations Printer boards 5060-4xx Connector locations 5-1 - Lexmark C760 | Service Manual - Page 304
motor RIP fan Web oiler drive motor (optional) Printheads Yellow carriage drive motor Fuser drive motor and card Fuser fan VTB fan Cyan carriage drive motor Magenta carriage drive motor Pick asm motor Registration drive motor ITU drive motor Black carriage drive motor 5-2 Service Manual - Lexmark C760 | Service Manual - Page 305
Printer sensors 5060-4xx Connector locations 5-3 - Lexmark C760 | Service Manual - Page 306
5060-4xx Cartridge contact assembly pin locations (cyan, magenta and yellow) 5-4 Service Manual - Lexmark C760 | Service Manual - Page 307
Cartridge contact assembly pin locations (black) 5060-4xx Connector locations 5-5 - Lexmark C760 | Service Manual - Page 308
5060-4xx Connectors System board - non-network 5-6 Service Manual - Lexmark C760 | Service Manual - Page 309
System board - network 5060-4xx Connector locations 5-7 - Lexmark C760 | Service Manual - Page 310
4 5 1 2 1 2 3 4 5 6 7 1 2 3 4 5 Signal Ground USB +5 V dc USB DUSB D+ Ground Ground Printer TXD Ground Ground Printer RXD +24V_OPTIONS (through fuse F11) Ground +5V_OPTIONS (through fuse F9 +5V_BIN_FULL (switched) Ground BIN_FULL_IN Ground OP-Panel Interrupt (Active line) 5-8 Service Manual - Lexmark C760 | Service Manual - Page 311
5060-4xx See "System board - non-network" on page 5-6 or "System board - network" on page 5-7. Connector J7 Yellow Printhead Mirror Motor J8 Yellow and Cyan Video to Printheads Pin no. 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 Signal FUSE24V Ground Ground +5 V - Lexmark C760 | Service Manual - Page 312
3 1 2 3 4 5 6 7 8 9 10 Signal FUSE24V Ground Ground +5 V dc (through fuse F12) C_MMSTART C_HSYN_SOS C_MMLOCK Ground C_MMREF N/C +5 V dc (direct from low voltage power supply) Ground VDO_ERR (+5 V dc to J8 and J12) FUSE24V Ground Ground V_V5FUSE M_MMSTART M_HSYN-S0S M_MMLOCK Ground M_MMREF N/C 5-10 - Lexmark C760 | Service Manual - Page 313
5060-4xx See "System board - non-network" on page 5-6 or "System board - network" on page 5-7. Connector J12 Printhead - Black/Magenta Video Pin no. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 J13 Printhead - Black Mirror Motor 1 2 3 4 5 6 7 8 9 10 Signal K_DATA+ - Lexmark C760 | Service Manual - Page 314
(active low) SC_K_CHIP N/C K_DEV_PWM_OUT -CART_METER_M_IN K_CHARGE_PWM_OUT CMY_CHARGE_PWM_OUT SC_M_CHIP N/C -CART_METER_C_IN CMY_AC_BIAS_ENABLE (active low) SC_C_CHIP N/C M_DEV_PWM_OUT -CART_METER_Y_IN C_DEV_PWM_OUT Y_DEV_PWM_OUT SC_Y_CHIP N/C Ground +24V_SWITCHED N/C N/C 5-12 Service Manual - Lexmark C760 | Service Manual - Page 315
5060-4xx See "System board - non-network" on page 5-6 or "System board - network" on page 5-7. Connector J15 Transfer HVPS J16 Option DRAM Socket J17 Not Used J18 Parallel Port J19 Not Used J20 ITU/TPS Autoconnect Pin no. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Signal ITU_TX_ENA_OUT (active low) - Lexmark C760 | Service Manual - Page 316
4 AUTOCOMP_ENC 5 PAPER_LOW_IN 6 Ground 7 Ground 8 Ground 9 AUTOCOMP_OUT1 (+24 V dc in standby) 10 AUTOCOMP_OUT2 (+24 V dc in standby) 1 +24V To Cover Open Switch 2 +24V dc Switched 5-14 Service Manual - Lexmark C760 | Service Manual - Page 317
5060-4xx See "System board - non-network" on page 5-6 or "System board - network" on page 5-7. Connector J29 Fuser Stepper Motor/ Yellow BLDC Motor J30 ITU/Black BLDC Motors J31 Fuser Fan Pin no. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 1 2 3 4 5 Signal - Lexmark C760 | Service Manual - Page 318
-4xx See "System board - non-network" on page 5-6 or "System board - network" on page 5-7. Connector J32 VTB Fan J33 Fuser Interface J34 Magenta/Cyan BLDC Motors Pin no. 1 2 3 4 1 2 3 4 5 6 7 8 9 10 11 12 ) Ground Ground M_CLK_OUT C_CLK_OUT M_HALL_IN C_HALL_IN N/C N/C N/C N/C 5-16 Service Manual - Lexmark C760 | Service Manual - Page 319
" on page 5-6 or "System board - network" on page 5-7. Connector J35 Low Voltage Power Supply J37 Bottom Options Connector Waste Toner Full Media Size Pin no. 1 2 3 4 5 6 7 8 9 10 11 12 Ground Ground Ground Ground Ground Ground Printer TXD Ground Ground Printer RXD +24V_OPTIONS (Through fuse F11 - Lexmark C760 | Service Manual - Page 320
Pin no. 1 2 3 4 Signal Ground Printer RXD Printer TXD +5V dc (Through fuse F8) Autoconnect-top Connector CN1 Autoconnect-top Pin no 1 2 3 4 5 6 7 8 Color White Black Yellow Black N/A Red Black Blue Signal +24 V dc Ground Printer RXD Ground NC +5 V dc Ground Printer TXD 5-18 Service Manual - Lexmark C760 | Service Manual - Page 321
Autoconnect-bottom 5060-4xx Connector CN1 Autoconnect-bottom Pin no 1 2 3 4 5 6 7 8 Signal White Black Yellow Black Brown Red Black Blue Signal +24 V dc Ground Printer RXD Ground STAGING_ENCODER +5 V dc Ground Printer TXD Connector locations 5-19 - Lexmark C760 | Service Manual - Page 322
5060-4xx Transfer high voltage power supply (HVPS) 5-20 Service Manual - Lexmark C760 | Service Manual - Page 323
C-Txpwm C-Srvo out K-Txpwm K-Srvo out KCYM-Txenable ITU-Txpwm ITU-Srvo out ITU-Txcurpwm TUI-Txenable HV Transformer output to 2nd Transfer Roll Cable HV Transformer Output Terminal to Black Transfer Cable HV Transformer Output Terminal to Cyan Transfer Cable HV Transformer Output Terminal to Yellow - Lexmark C760 | Service Manual - Page 324
5060-4xx Developer high voltage power supply (HVPS) board Connector CN1 Developer HVPS Input CN2 Cartridge Signature Button Black CN3 Cartridge Signature Button Magenta CN4 Cartridge Signature Button Cyan Pin no 1 2 3 4 5 6 7 (red wire) C-TnrSense (Gnd Return) (black wire) 5-22 Service Manual - Lexmark C760 | Service Manual - Page 325
(Gnd Return) (black wire) Cleaner Bias Terminal (not used) Low voltage power supply (LVPS) LVPS cable connectors to system board Connector Main power to system board (J35) LVPS to system board cable for fuser (J33) Pin no. Signal 1 +3.3 V dc 2 +3.3 V dc 3 +5 V dc 4 +5 V dc 5 +24 V dc - Lexmark C760 | Service Manual - Page 326
Connector LVPS AC Fuser Connector LVPS DC Fuser Control Connector Pin no. 1 2 3 4 5 1 2 3 4 5 6 7 8 9 10 Signal AC Load #1 AC Common Ground N/C AC Load #2x FusExitSen BURCam1 N/C WebEncoderA WebEncoderB HRThermistor BURThermistor Return - Analog Ground +5 V dc switched N/C 5-24 Service Manual - Lexmark C760 | Service Manual - Page 327
Paper size sensing board 5060-4xx Connector J1 J2 J3 Pin no. Signal 1 +3.3V dc 2 EPROM Data 3 Ground 4 EPROM Clock 1 J3-1 (Waste BTL Full) 2 Ground 3 Waste BTL PRESENT (SW4) 4 Tray Size 1 (SW3) 5 Ground 6 Tray Size 2 (SW2) 7 Tray Size 3 (SW1) 1 J2-1 (Waste BTL Full) 2 - Lexmark C760 | Service Manual - Page 328
V dc REG A REG A REG B REG B 7 CN4 PICK Motor 1 2 3 4 5 6 CN5 LIFT Motor 1 2 No Connection +24 V dc +24 V dc PICK A *PICK A PICK B *PICK B +24 V dc LHOT 5-26 Service Manual - Lexmark C760 | Service Manual - Page 329
5060-4xx Connector Pin no. Signal CN6 Sensors 1 Side Door/Level/ Empty/ 2 Registration Home/Pick Home 3 4 5 6 7 8 9 10 11 12 13 14 15 CN7 Size 1 Sensors/Near Empty 2 3 4 5 6 7 8 9 +5 V dc GND SIDE +5 V dc GND LEVEL +5 V dc GND EMPTY +5 V dc GND RHOME +5 V dc GND - Lexmark C760 | Service Manual - Page 330
5060-4xx High-capacity output finisher (HCOF) HCOF system board For a more detailed diagram, see "Finisher cables" on page 7-68. 5-28 Service Manual - Lexmark C760 | Service Manual - Page 331
Sensor Accumulator Homing Sensor CN5 Chad Box Full Pin no 1 2 1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 6 7 8 1 2 3 4 5 6 1 2 3 Signal SOL+ SOLMTRMTRN/C MTR+ MTR+ N/C No Cartridge Low Staple Home Position Unit Check Ground +5 V dc Jog A Jog *A Jog B Jog *B Bun A Bun *A Bun B Bun *B +5 V dc Jog Home Pos - Lexmark C760 | Service Manual - Page 332
Surface Upper Sensor Ground +5 V dc Paper Surface Lower Sensor Ground A+ AB+ B+SOL -SOL +5 V dc Inverter Jam Sensor Ground Switch + Switch MTR + MTR A+ AB+ BN/C 5-30 Service Manual - Lexmark C760 | Service Manual - Page 333
system board" on page 5-28. Connector CN14 Low Voltage Power Supply CN15 Enter Motor CN16 Punch Motor Homing Sensor/ Drop Timing Sensor/ Inverter Timing Sensor/ Punch timing Sensor CN17 Accumulator Solenoid CN18 Communications CN19 Printer Docking Switch CN20 CPU Prog CN21 Fan Connector - not used - Lexmark C760 | Service Manual - Page 334
1 +5 V dc Switched 2 AC In Not used Not used Not used AC In AC Out to LVPS Not used AC Out to LVPS +5 V dc Ground 5-32 Service Manual - Lexmark C760 | Service Manual - Page 335
5060-4xx 6. Preventive maintenance This chapter describes procedures for printer preventive maintenance. Follow these recommendations to help prevent problems and maintain optimum performance. Safety inspection guide The purpose of this inspection guide is to aid you in identifying unsafe conditions - Lexmark C760 | Service Manual - Page 336
in the FRU. Only use the lubricant included. Fuser drive assembly Before installing the new fuser drive assembly: 1. Apply a thin coating of Nyogel type 774 grease to the points identified (A) from the supplied packet. 2. Rotate the motor housing (B) to distribute evenly. 6-2 Service Manual - Lexmark C760 | Service Manual - Page 337
5060-4xx Cartridge drive assembly 1. Apply a thin coating of Nyogel type 744 grease to the points identified (A) from the supplied packet. A B 2. Rotate the motor housing (B) to distribute evenly. ITU drive assembly 1. Apply a thin coating of Nyogel type 744 grease to the points identified (A) from - Lexmark C760 | Service Manual - Page 338
reliability of the printer. There are two assemblies, ITU assembly and Second Transfer Roll, in a maintenance kit. Both should be replaced at the same time. The parts are available as a maintenance kit with P/N 56P2848, ITU Maintenance Kit. After replacing the kit, the fuser maintenance count must - Lexmark C760 | Service Manual - Page 339
NS: (Not Shown) in the Asm-Index column indicates that the part is procurable but is not pictured in the illustration. The Lexmark C76x (506x-4xx) laser printer is available in four models: Lexmark C760 Lexmark C760 Lexmark C762 Lexmark C762 5060-401 5060-402 5060-421 5060-422 Non-network Network - Lexmark C760 | Service Manual - Page 340
5060-4xx Assembly 1: Covers 7-2 Service Manual - Lexmark C760 | Service Manual - Page 341
1 Left front light shield cover 1 Paper tray guide 1 Operator panel bezel with overlays, 421/422 only 1 Operator panel bezel with overlays, 401/402 only 1 Operator panel assembly 2 Screws, parts packet 12G6532 1 Front upper pivot cover 1 Front access door support 1 Label, top paper jam, 421/422 only - Lexmark C760 | Service Manual - Page 342
5060-4xx Assembly 1.1: Covers 7-4 Service Manual - Lexmark C760 | Service Manual - Page 343
Description 1 Left upper cover assembly 21 Screw type 323, parts packet 12G6309 1 Left upper pivot cover 1 Jam access Fuser latch slide 2 Fuser latch slide spring 1 Fuser top duct 1 Duplex actuator arm assembly 1 RIP fan duct 1 Fuser wall duct 1 Fuser bottom duct 1 Fuser left duct 1 Redrive belt - Lexmark C760 | Service Manual - Page 344
5060-4xx Assembly 2: Cartridge mounting Asmindex 2-1 2 3 Part number 12G6535 12G6536 Units Description 4 Guide assembly, left side 4 Guide assembly, right side 12 Screws, parts packet 12G6532 7-6 Service Manual - Lexmark C760 | Service Manual - Page 345
Assembly 3: Fuser assembly 5060-4xx 1 Asmindex 3-1 1 1 Part number 56P2852 56P2851 56P2853 Units Description 1 Fuser assembly, 220 V 500W 1 Fuser assembly, 115 V 500W 1 Fuser assembly, 100 V 500W (Japan) Parts catalog 7-7 - Lexmark C760 | Service Manual - Page 346
5060-4xx Assembly 3.1: Fuser (web oiler) 7-8 Service Manual - Lexmark C760 | Service Manual - Page 347
3.1: Fuser (web oiler) Asmindex 3.1-1 2 2 2 3 4 Part number 12G6545 56P2856 56P2855 56P2854 56P1558 12G6543 Units Description 1 Web oiler assembly 1 Fuser assembly, web oiler 220 V 500W 1 Fuser assembly, web oiler 115 V 500W 1 Fuser assembly, web oiler 100 V 500W (Japan) 1 Web oiler driver board - Lexmark C760 | Service Manual - Page 348
5060-4xx Assembly 4: Fuser drive Asmindex 4-1 2 3 4 Part number 56P2802 56P1563 Units Description 4 Screws type 323, parts packet 12G6309 1 Fuser drive assembly 1 Card assembly - fuser drive 3 Screws, parts packet 12G6531 (card assembly mounting) 7-10 Service Manual - Lexmark C760 | Service Manual - Page 349
Assembly 5: Vacuum transport belt (VTB) assembly 5060-4xx 2 1 Asmindex 5-1 2 Part number 12G6491 12G6489 Units Description 1 Jam access spring 1 Vacuum transport belt assembly Parts catalog 7-11 - Lexmark C760 | Service Manual - Page 350
5060-4xx Assembly 6: Transfer 1 2 Asmindex 6-1 2 Part number 12G6303 12G6488 Units Description 1 Second transfer roll 1 Transfer plate assembly 7-12 Service Manual - Lexmark C760 | Service Manual - Page 351
7: Printheads 5060-4xx Asmindex 7-1 2 3 4 5 6 Part number 56P2801 56P2292 56P1198 56P2296 Units 4 12 4 4 8 1 Description Printhead assembly (do not replace more than one printhead at a time) Screw, parts packet 12G6534 Printhead spacer Thermistor card Screw, parts packet 12G6533 Card assembly - Lexmark C760 | Service Manual - Page 352
56P2837 Units 8 2 2 1 1 1 1 1 2 1 Description Anchor, bracket mounting Upper door hinge Screw, parts packet 12G6533 Redrive belt 300 T Redrive assembly Redrive door assembly Lower right door latch Lower left door latch Screw, parts packet 12G6530 Lower right door assembly 7-14 Service Manual - Lexmark C760 | Service Manual - Page 353
Assembly 9: Paper feed input 5060-4xx Asmindex 9-1 2 3 4 5 Part number 56P2101 56P2175 56P2174 56P1524 56P2100 Units Description 2 Sensor, S2/NMS 1 Sensor, transparency reflective (XPAR) 1 Cable, S2/XPAR/NMS/MPF (without sensors) 1 Paper out sensor - Lexmark C760 | Service Manual - Page 354
sensing card mounting, parts packet 12G6531 US media size sensing card assembly, 421/422 only Non-US media size sensing card assembly, 421/422 only US media size sensing card assembly, 401/402 only Non-US media size sensing card assembly, 401/402 only Paper size sensing link 7-16 Service Manual - Lexmark C760 | Service Manual - Page 355
Assembly 11: Paper feed transport 5060-4xx Asmindex 11-1 2 3 Part number 56P2194 56P2857 Units Description Nip relief handle 1 Kit, registration motor assembly, including - Staging motor assembly - Gear, reference plate - Gear, staging idler - Gear, staging reduction - Motor screws 3 Screw type - Lexmark C760 | Service Manual - Page 356
5060-4xx Assembly 12: Multipurpose feeder (MPF) 7-18 Service Manual - Lexmark C760 | Service Manual - Page 357
12G6346 56P2830 Units Description 1 MP feeder door cover 1 Door hinge restraint 1 Screw, parts packet 12G6533 1 Frame bias latch 1 Frame bias latch cover 11 Screw, parts packet 12G6533 1 Frame bias spring 2 MPF support bracket cover 1 Sensor mount bracket 1 Paper out sensor MPF 1 MPF cable cover - Lexmark C760 | Service Manual - Page 358
tray Asmindex 13-1 2 3 4 5 6 7 8 9 10 11 Part number 56P2834 12G6419 12G6418 12G6425 12G6426 12G6568 12G6421 12G6420 56P1504 12G6417 Units 1 1 Back restraint latch Back restraint Tray bias bellcrank assembly Screw, parts packet 12G6533 Tray bias spring Reflector label Wear strip Tray wear - Lexmark C760 | Service Manual - Page 359
-4xx Asmindex 14-1 2 3 4 5 6 7 8 9 10 Part number 12G6471 12G6558 56P1526 12G6557 12G6476 12G6472 12G6461 99A0070 56P1542 Units Description bracket 1 Sensor, paper out/low 1 Screw, pick roll mounting, parts packet 12G6533 2 Pick roll tires (2 per pack) Cable, pick motor extension and paper - Lexmark C760 | Service Manual - Page 360
5060-4xx Assembly 15: ITU assembly Asmindex 15-1 2 3 4 Part number 56P1513 56P1540 56P2847 56P1572 Units Description 1 ITU light shield assembly (autoconnect) 1 Printhead interlock cable assembly 1 ITU assembly 1 ITU coupler retract lever 7-22 Service Manual - Lexmark C760 | Service Manual - Page 361
16-1 2 3 4 5 Part number 56P2806 12G6385 56P2805 Units Description 1 ITU drive motor assembly 1 #58 gear 1 ITU motor drive 4 Screw type 323, parts packet 12G6309 (ITU drive motor to ITU drive assembly) 3 Screw type 323, parts packet 12G6309 (ITU drive assembly lower frame) Parts catalog 7-23 - Lexmark C760 | Service Manual - Page 362
5060-4xx Assembly 17: ITU loading 7-24 Service Manual - Lexmark C760 | Service Manual - Page 363
, contact spring 4 Screw, parts packet 12G6533 8 Cartridge support roller 1 Parts packet, ITU loading - yellow, including - Yellow BOR spring - Rear block guide - Rear transfer bellcrank - Front V block guide - Front transfer bellcrank - High voltage contact spring 1 Parts packet, ITU loading - cyan - Lexmark C760 | Service Manual - Page 364
5060-4xx Assembly 18: Waste toner Asmindex 18-1 2 3 Part number 12G6494 12G6470 12G6469 Units Description 1 Waste toner container 1 Waste container latch spring 1 Waste container latch 7-26 Service Manual - Lexmark C760 | Service Manual - Page 365
Assembly 19: BOR drive assembly 5060-4xx 1 Asmindex 19-1 Part number 56P1536 Units Description 1 Motor assembly, Lift/BOR Parts catalog 7-27 - Lexmark C760 | Service Manual - Page 366
20: Cartridge contact assembly Asmindex 20-1 2 3 4 Part number 56P0310 12G6376 12G6377 56P1561 Units 3 4 4 1 Description Cartridge contact assembly, complete, cyan/magenta/yellow Spring, rear hold down Rear hold down bellcrank Cartridge contact assembly, complete black 7-28 Service Manual - Lexmark C760 | Service Manual - Page 367
Assembly 21: Cartridge drive assembly 5060-4xx Asmindex 21-1 2 3 Part number 56P2803 56P2804 Units Description 3 Cartridge drive assembly, cyan/magenta/black (one drive assembly per package) 12 Screw, parts packet 12G6530 1 Cartridge drive assembly, yellow Parts catalog 7-29 - Lexmark C760 | Service Manual - Page 368
5060-4xx Assembly 22: Electronics 7-30 Service Manual - Lexmark C760 | Service Manual - Page 369
Switzerland 1 Power cord set-Botswana, Lesotho, Namibia, South Africa 1 Power cord set (HV)-Chile, Uruguay 1 Power cord set-Denmark 1 Power cord set (LV)-Brazil 1 Power cord set (HV)-Paraguay 1 Power cord set (HV)-Ireland, UK 1 LVPS, 115V/230V switchable 8 Screw, parts packet 12G6540 Parts catalog - Lexmark C760 | Service Manual - Page 370
5060-4xx Assembly 22.1: Electronics 1 6 6 13 12 9 6 8 10 11 6 7 6 6 2 2 3 4 5 7-32 Service Manual - Lexmark C760 | Service Manual - Page 371
shield assembly with clips 1 Cable, ground 1 System board shield support with clips 21 Screw, parts packet 12G6531 1 System board, network, 402/422 only 1 System board, non-network, 401/421 only 2 Stand off 1 Card assembly, bar code 1 - Lexmark C760 | Service Manual - Page 372
56P2897 Units Description 1 Transfer HVPS board 2 Screw type 323, parts packet 12G6309 (TFR HVPS board to frame) 1 Screw, parts packet 12G6530 (TFR HVPS board to frame) 3 Standoff, high voltage power supply - developer board 8 Screw, parts packet 12G6540 1 Developer HVPS board 7-34 Service Manual - Lexmark C760 | Service Manual - Page 373
Assembly 22.3: Electronics 7 6 5 3 2 1 4 5060-4xx Asmindex 22.3-1 2 3 4 5 6 7 Part number 56P1551 12G6490 56P1509 12G6529 56P1538 56P1500 Units Description 1 VTB fan, 60 mm 1 VTB fan gap cover 1 Fuser fan assembly with cable 2 Screws, fuser fan mounting 1 RIP fan, 92 mm 1 RIP fan duct 2 - Lexmark C760 | Service Manual - Page 374
5060-4xx Assembly 23: Electronics-cabling interconnections 1 7-36 Service Manual - Lexmark C760 | Service Manual - Page 375
, ITU and K cartridge motor 1 Cable, C and M cartridge motor 1 Cable assembly - options bottom/paper size sensing 1 LVPS assembly - with cable - power 1 LVPS assembly - for fuser DC control 1 VTB fan, 60 mm 1 Fuser fan assembly with cable 1 Cable, fuser and Y cartridge motor 1 Toroids, parts packet - Lexmark C760 | Service Manual - Page 376
5060-4xx Assembly 24: Electronics-cabling interconnections 2 7-38 Service Manual - Lexmark C760 | Service Manual - Page 377
56P1568 56P1566 56P0174 56P1502 Units Description 1 Black terminal contact assembly 1 Cyan terminal contact assembly 1 Yellow terminal contact assembly 1 Magenta terminal contact assembly 1 Cable assembly, second transfer voltage 1 Cable, HVPS control - transfer 5060-4xx Parts catalog 7-39 - Lexmark C760 | Service Manual - Page 378
4xx Assembly 25: Electronics-cabling interconnections 3 Asmindex 25-1 2 3 Part number 56P1501 56P0310 56P1561 Units Description 1 Cable assembly, HVPS control - developer 3 Cartridge contact assembly, complete, cyan/magenta/yellow 1 Cartridge contact assembly, complete, black 7-40 Service Manual - Lexmark C760 | Service Manual - Page 379
Assembly 26: Electronics-cabling interconnections 4 5060-4xx Asmindex 26-1 2 Part number 56P1503 56P2806 Units Description 1 Cable assembly - options bottom/paper size sensing 1 ITU drive assembly with motor and waste toner full switch Parts catalog 7-41 - Lexmark C760 | Service Manual - Page 380
5060-4xx Assembly 27: Output expander 7-42 Service Manual - Lexmark C760 | Service Manual - Page 381
16 17 18 19 20 21 22 23 24 Part number 56P2870 56P2918 56P2919 56P2875 99A0104 99A0369 99A0052 exit, also order parts packet 99A0572 1 Shaft assembly, lower exit, also order parts packet 99A0572 1 assembly 1 Spring, output tray 2 Shaft bearing, parts packet 99A0572 1 Latch, output tray 2 Bracket, - Lexmark C760 | Service Manual - Page 382
5060-4xx Assembly 27.1: Output expander 7-44 Service Manual - Lexmark C760 | Service Manual - Page 383
Arm assembly, belt idler 1 Spring, belt tensioner 1 Spring, output tray 1 Latch, output tray 1 Frame assembly 1 Sensor, output expander pass thru 6 Shaft bearing, parts packet 99A0572 1 Shaft assembly, middle 40T, also order parts packet 99A0572 1 Kit, multi-bin stacker 5060-4xx Parts catalog 7-45 - Lexmark C760 | Service Manual - Page 384
5060-4xx Assembly 28: 5-Bin mailbox 7-46 Service Manual - Lexmark C760 | Service Manual - Page 385
21 22 23 24 25 26 27 28 29 30 31 32 33 Part number 56P2880 56P2820 56P2937 56P2882 56P2931 99A0104 56P2889 56P2881 56P2930 99A1723 99A1724 56P2886 cap 1 Bracket asm, bail attach 1 Kit, 5-bin mailbox asm 1 Bail, order P/N 56P2940, 5-bin mailbox asm kit 5 Support, paper tray 5 Stop asm, paper tray - Lexmark C760 | Service Manual - Page 386
5060-4xx Assembly 28.1: 5-Bin mailbox 7-48 Service Manual - Lexmark C760 | Service Manual - Page 387
Assembly 28.1: 5-Bin mailbox Asmindex 28.1-1 2 3 4 5 6 7 8 9 10 11 12 13 14 NS NS NS NS NS NS NS Part number 99A1741 56P2936 99A1728 99A1731 99A1729 99A1730 99A1789 56P0418 99A1732 56P2938 56P2934 99A1787 56P2933 56P0421 99A0462 99A1715 99A1717 99A1788 99A0450 56P0550 Units Description 4 Spring, - Lexmark C760 | Service Manual - Page 388
5060-4xx Assembly 29: 500-Sheet drawer option 7-50 Service Manual - Lexmark C760 | Service Manual - Page 389
56P1504 Units Description 1 500-Sheet drawer option, complete 1 500-Sheet tray assembly 1 Back restraint latch 1 Back restraint 1 Tray bias bellcrank assembly 1 Screw, parts packet 12G6533 1 Tray bias spring 1 Reflector label 1 Wear strip 1 Tray wear clip 1 Side restraint 2 Restraint pad 5060-4xx - Lexmark C760 | Service Manual - Page 390
5060-4xx Assembly 29.1: 500-Sheet drawer option 7-52 Service Manual - Lexmark C760 | Service Manual - Page 391
10 11 12 13 14 15 16 17 18 19 20 21 NS Part number 56P0168 56P2868 12G6565 12G6471 56P2859 12G6553 12G6562 12G6559 12G6558 12G6566 12G6557 1 Bellcrank lift spring 1 500 base assembly 7 Machine pad 1 Paper guide 1 Wall support plate 1 Base door assembly 1 Spring 1 500 option deflector 1 Grounding - Lexmark C760 | Service Manual - Page 392
5060-4xx Assembly 30: Duplex option 7-54 Service Manual - Lexmark C760 | Service Manual - Page 393
entry shaft assembly 20 Screw, parts packet 12G6533 1 Right side front tray guide 1 Deflector actuator assembly 1 Deflector follower assembly 1 Duplex front jam tray assembly 1 Duplex support bracket 1 Sensor mount plate 1 Duplex exit sensor 1 Duplex shaft mount 1 Front decurl assembly 1 F/R backup - Lexmark C760 | Service Manual - Page 394
5060-4xx Assembly 30.1: Duplex option 7-56 Service Manual - Lexmark C760 | Service Manual - Page 395
cable assembly 1 DC forward/reverse motor assembly 1 DC duplex feed motor 1 Screw type 323, parts packet 12G6309 6 Cable tie (6 in pack) 1 Screw type 323, parts packet 88A0235 1 Back support 1 Duplex card assembly 1 Belt, transfer 1 Right jam clearance tray assembly 1 Chassis ground spring - Lexmark C760 | Service Manual - Page 396
5060-4xx Assembly 31: High-capacity input tray (HCIT) 7-58 Service Manual - Lexmark C760 | Service Manual - Page 397
, photo interrupter 1 Paper size sensors cable 1 System control board Screws, parts packet 12G6533 1 LVPS 1 Elevator motor assembly 1 AC power outlet 1 AC power inlet 1 Jumper, AC power cord 1 Paper tray guide 1 Elevator lift belt 1 Elevator lift 3 Ring 7, elevator lift gear/elevator lift 1 Elevator - Lexmark C760 | Service Manual - Page 398
5060-4xx Assembly 31.1: High-capacity input tray (HCIT) 7-60 Service Manual - Lexmark C760 | Service Manual - Page 399
56P0564 Units Description 1 Rear cover 1 Right side cover 2 Caster, movable 16 Screws, parts packet 12G6533 4 F adjuster 1 Front cover 1 Cover, main CA 2 Caster, elevator motor 1 Magnetic latch 1 Tray present lever 9 Cable clamp 1 Kit, stabilizer with mounting screws 5060-4xx Parts catalog 7-61 - Lexmark C760 | Service Manual - Page 400
5060-4xx Assembly 32: Finisher 7-62 Service Manual - Lexmark C760 | Service Manual - Page 401
AsmIndex 32-1 1 2 2 3 3 4 5 6 7 8 9 10 11 Part number 56P0321 56P1287 56P0569 56P1285 56P0573 56P1286 56P0574 56P0576 56P0575 56P0387 56P0577 56P0320 56P0566 56P1290 Units 1 Bar tip unit 1 Lower right side cover 1 Cover front door 1 Finisher install kit 1 Cover wire 5060-4xx Parts catalog 7-63 - Lexmark C760 | Service Manual - Page 402
5060-4xx Assembly 32.1: Finisher 7-64 Service Manual - Lexmark C760 | Service Manual - Page 403
SX460-P1-CHN) 1 Printer docking switch SS-5FL-3T(10E) 1 Tray limit switches (includes two) 1 Exit timing sensor (EE-SPY415) 1 Inverter transfer belt (40S3M198) 1 Communications cable 1 Power cord 1 Bracket finisher alignment 1 Pack magnet, strong and weak and door latch 5060-4xx Parts catalog 7-65 - Lexmark C760 | Service Manual - Page 404
5060-4xx Assembly 32.2: Finisher 7-66 Service Manual - Lexmark C760 | Service Manual - Page 405
slides 1 Staple cartridge 1 Exit timing sensor (EE-SPY415) 1 Inverter timing sensor (OJ511K-A5) 1 Paper feed-input belt (40S3M279) 1 Cover open switch 1 Jogger fence belt (B40S2M460) 1 Harness cable assembly D5 - low voltage power supply to low voltage power relay board Parts catalog 7-67 - Lexmark C760 | Service Manual - Page 406
Assembly 33: Finisher cables Service Manual 5060-4xx - Lexmark C760 | Service Manual - Page 407
Harness cable assembly H5 - system board to printer docking switch 1 Harness cable assembly H6 - power supply 1 Harness cable assembly D3 - low voltage power supply relay board to AC input/output 1 Harness cable assembly D5 - low voltage power supply to low voltage power supply relay board. Parts - Lexmark C760 | Service Manual - Page 408
5060-4xx Assembly 34: Envelope option 7-70 Service Manual - Lexmark C760 | Service Manual - Page 409
Assembly 34: Envelope option Asmindex 34-1 2 Part number 56P2890 56P2891 Units Description 1 Envelope option (complete) 1 Envelope tray assembly 5060-4xx Parts catalog 7-71 - Lexmark C760 | Service Manual - Page 410
5060-4xx Assembly 35: Outdoor media tray option Asmindex 35-1 2 Part number 56P2892 56P2893 Units Description 1 Outdoor media drawer assembly 1 Outdoor media tray assembly 7-72 Service Manual - Lexmark C760 | Service Manual - Page 411
Assembly 36: Banner option 5060-4xx Asmindex 36-1 Part number 56P2894 Units Description 1 Banner input assembly Parts catalog 7-73 - Lexmark C760 | Service Manual - Page 412
5060-4xx Assembly 37: Options 7-74 Service Manual - Lexmark C760 | Service Manual - Page 413
NS NS NS NS NS NS Part number 12G6509 56P9910 56P9911 56P2223 56P1417 Lexmark Optra Forms™ Software 1 Lexmark Forms Director Software 1 Lexmark Forms 16MB Flash DIMM 1 Lexmark Forms 32MB Flash DIMM 1 Hard Drive Mounting Kit PrintCryption™ card assembly 1 Bar code card assembly 1 ImageQuick™ card - Lexmark C760 | Service Manual - Page 414
1 Kit, relocation package assembly printer 1 Kit, relocation package assembly output expander 1 Kit, relocation package assembly 5-bin mailbox 1 Kit, relocation package assembly 500 drawer 1 Kit, relocation package assembly duplex 1 Kit, relocation package assembly finisher 7-76 Service Manual - Lexmark C760 | Service Manual - Page 415
the printer displays the codes that indicate yellow or cyan, use the tool to switch the yellow and cyan signals. If the error codes indicated a magenta or black error, use the tool to switch the magenta and black signals. Connect tool here for: Yellow/cyan Magenta/black Appendix A-Service tips - Lexmark C760 | Service Manual - Page 416
the printer. b. Unplug the printhead cables from the system board and connect them to the printhead diagnostic tool. c. Connect the printhead diagnostic tool cables to the connectors on the system board. This reverses the printhead color signals for the selected pair of colors. A-2 Service Manual - Lexmark C760 | Service Manual - Page 417
should be checked. Press Go to clear the error. • If the error code remains the same, replace the "System board". If that solves the problem, you are finished. • If the printer displays a different printhead error code, which indicates another color, the printhead or the printhead cables are - Lexmark C760 | Service Manual - Page 418
the cover to access the printheads. • If there is a protective lens cover on the new printhead, it must be removed before installing the replacement printhead. A-4 Service Manual - Lexmark C760 | Service Manual - Page 419
5060-4xx System board cabling reference See "System board - non-network" on page 5-6 or "System board - network" on page 5-7 for connections. Refer to the System board wiring diagram for additional details. Appendix A-Service tips A-5 - Lexmark C760 | Service Manual - Page 420
information to properly route the belt. The idler gear roller in these photos is only visible because the printer has been disassembled to the belt properly routed on the idler gear (C) and the roller (D). • Redrive belt properly routed on the vacuum transfer belt (VTB) gear (E). A-6 Service Manual - Lexmark C760 | Service Manual - Page 421
5060-4xx Finisher alignment This tip provides detailed instructions for aligning the finisher to the printer. The sides of the finisher must be parallel with the printer and at the same height, or you may have paper feeding problems. There are four locations where adjustments can be made to - Lexmark C760 | Service Manual - Page 422
5060-4xx • Tall finisher - Printer - Optional duplex unit - One additional 500-sheet drawer - Optional 2000-sheet drawer - Finisher Printer Duplex unit 500-sheet drawer 2000-sheet drawer Finisher A-8 Service Manual - Lexmark C760 | Service Manual - Page 423
have a short or tall finisher. Short finisher 1. Attach caster brakes (A) to the two back legs of the printer caster base. 2. Screw the caster brakes onto the legs of the caster base. 3. Adjust the leveling feet (B) -sheet drawer so all four securely touch the floor. C Appendix A-Service tips A-9 - Lexmark C760 | Service Manual - Page 424
pin Adjust the two casters on the left side (closest to the printer) to raise or lower the finisher as needed, so the pin (D) on the printer properly aligns with the hole in the finisher (the pin should freely (clockwise raises the finisher). 3. Repeat with the other caster bolt. A-10 Service Manual - Lexmark C760 | Service Manual - Page 425
right side (under the platform cover) to raise or lower the finisher as needed so the two bumper pads on the finisher lightly touch the printer. This ensures that the gap (H) between the printer and finisher is the same from top to bottom. H Appendix A-Service tips A-11 - Lexmark C760 | Service Manual - Page 426
If necessary, adjust the tilt of the finisher so that the front is flush with the front of the printer. This can usually be done by adjusting the two front casters (those closest to the finisher door). XX Note in steps 1, 2, and 3, make sure each caster touches the floor. A-12 Service Manual - Lexmark C760 | Service Manual - Page 427
run your hand across them from side to side they should feel as if they are one part. "Step 4: Adjust the tilt" on appendix page A-12 5. The finisher is squarely docked to the printer. The printer and finisher's top covers should have the same distance between them at the front and rear when - Lexmark C760 | Service Manual - Page 428
in the fuser and the paper is diverted away from the duplex. The duplex option does not receive the sheet and prompts a 230 Paper Jam message. Replace the rubber deflector button with the enclosed compression spring deflector button. Replacing the button 1. The FRU kit contains two parts that should - Lexmark C760 | Service Manual - Page 429
3. Place the new button into the cam. 5060-4xx 4. Verify the new button moves freely by pressing the button firmly down and watching it snap back. Note: Leave the button in the up position. Appendix A-Service tips A-15 - Lexmark C760 | Service Manual - Page 430
5060-4xx A-16 Service Manual - Lexmark C760 | Service Manual - Page 431
the pages available in various menus. While they are as close as possible to what you will see, variations in printing may result from individual user printer settings, media, and printer alignment. Print Menus-Page one of two Appendix B-Print quality samples B-1 - Lexmark C760 | Service Manual - Page 432
5060-4xx Print Menus-Page two of two B-2 Service Manual - Lexmark C760 | Service Manual - Page 433
Print tests Print Quality Pages-Title page (total of five) 5060-4xx Appendix B-Print quality samples B-3 - Lexmark C760 | Service Manual - Page 434
5060-4xx Print Quality Pages-Page 1 (total of five) B-4 Service Manual - Lexmark C760 | Service Manual - Page 435
Print Quality Pages-Page 2 (total of five) 5060-4xx Appendix B-Print quality samples B-5 - Lexmark C760 | Service Manual - Page 436
5060-4xx Print Quality Pages-Page 3 (total of five) B-6 Service Manual - Lexmark C760 | Service Manual - Page 437
Print Quality Pages-Page 4 (total of five) 5060-4xx Appendix B-Print quality samples B-7 - Lexmark C760 | Service Manual - Page 438
5060-4xx Registration and alignment Quick Test Page B-8 Service Manual - Lexmark C760 | Service Manual - Page 439
Printhead mechanical alignment test page 5060-4xx Appendix B-Print quality samples B-9 - Lexmark C760 | Service Manual - Page 440
5060-4xx Printhead electronic alignment test page-Magenta (one of two) B-10 Service Manual - Lexmark C760 | Service Manual - Page 441
Printhead electronic alignment test page-Magenta (two of two) 5060-4xx Appendix B-Print quality samples B-11 - Lexmark C760 | Service Manual - Page 442
5060-4xx B-12 Service Manual - Lexmark C760 | Service Manual - Page 443
7-20 5-bin mailbox option diagnostics 2-5 parts catalog 7-46, 7-48 service checks 2-98 80 Fuser Maintenance 6-4 900 RIP Software Error service checks 2-83 9xx service errors error code table 2-6-2-8 error-specific service check 2-83-2-97 A AC power, service check 2-105 acoustics 1-5 acronyms 1-18 - Lexmark C760 | Service Manual - Page 444
EP Defaults 3-34 Fuser Temp 3-34 Transfer Adjust 3-34 ERROR LOG 3-35 Clear Log 3-36 Display Log 3-35 Print Log 3-35 EXIT DIAGNOSTICS 3-13, 3-36 FINISHER TESTS 3-28 Finisher Feed Test 3-28 Finisher Sensor Test 3-28 Hole Punch Test 3-29 Staple Test 3-28 I-2 Service Manual HARDWARE TESTS 3-20 Button - Lexmark C760 | Service Manual - Page 445
power supply (LVPS) connections 5-23, 5-24 location 5-1 parts catalog 7-31 removal 4-46 service check 2-86 lubrication cartridge drive assembly replacement 6-3 fuser drive assembly replacement 6-2 ITU drive assembly replacement 6-3 lubrication specifications 6-1 M maintenance kits 6-4 maintenance - Lexmark C760 | Service Manual - Page 446
7-73 BOR drive assembly 7-27 cartridge contact assembly 7-28 cartridge drive assembly 7-29 cartridge mounting 7-6 covers 7-2, 7-4 duplex option 7-54, 7-56 electronics 7-30, 7-32, 7-34, 7-35 electronics-cabling interconnections 1 7-36 I-4 Service Manual electronics-cabling interconnections 2 7-38 - Lexmark C760 | Service Manual - Page 447
73 transfer plate assembly 4-76 vacuum transport belt (VTB) 4-77 vacuum transport belt (VTB) fan 4-79 waste container door 4-79 waste container latch 4-80 web oiler fuser kit installation 4-80 Reset Calibration 3-34 Reset Fuser Count 3-9 resolution 1-3 RIP fan location 5-2 removal 4-69 service check - Lexmark C760 | Service Manual - Page 448
ITU error 2-63 100-990 error-specific service checks 2-41-2-97 500-sheet drawer option 2-102 5-bin mailbox option 2-98 900 error code 2-83 AC and DC power 2-105 autocompensator 2-107 black only retract (BOR) 2-109 cartridge drive assembly 2-64 close door/HVPS/printhead interlock switch 2-110 duplex - Lexmark C760 | Service Manual - Page 449
4-77 vacuum transport belt (VTB) fan 5-2 removal 4-79 service check 2-85 W waste container door, removal 4-79 waste container latch 7-26 waste toner container, parts catalog 7-26 web oiler fuser location 5-1 removal 4-80 replacement web oiler fusers 6-4 replacements 6-4 upgrade kit 1-17 5060-4xx - Lexmark C760 | Service Manual - Page 450
5060-4xx I-8 Service Manual - Lexmark C760 | Service Manual - Page 451
323, parts packet 7-3, 7-5, 7-10, 7-17, 7-23, 7-25, 7-34, 7-49, 7-53, 7-57, 7-76 12G6321 Cable, operator panel 7-37 12G6327 Transfer HVPS 7-34 12G6335 Stand off 7-33 12G6340 Fuser top duct 7-5 12G6346 Buckler housing 7-19 12G6347 Bellcrank, front hold door 7-3 12G6353 Cartridge support roller - Lexmark C760 | Service Manual - Page 452
packet 7-13, 7-76 12G6535 Guide assembly, left side 7-6 12G6536 Guide assembly, right side 7-6 12G6538 Screw, parts packet 7-76 12G6539 Screw type 124, parts packet 7-76 12G6540 Screw, parts packet 7-31, 7-34, 7-76 12G6541 Standoff, high voltage power supply - developer 7-34 12G6543 Web oiler - Lexmark C760 | Service Manual - Page 453
7-65 56P0333 Tray elevator belt (60S6M1420 7-65 56P0334 Tray elevator drive belt (170P2M4 7-65 56P0335 Exit roller drive belt (40S2M264 7-65 56P0336 Output tray offset drive belt (40S2M134 7-65 56P0337 Punch belt (40S2M176 7-65 56P0338 Low voltage power supply 7-65 56P0340 Communications cable - Lexmark C760 | Service Manual - Page 454
drive F/R gear 7-55 56P0447 Duplex entry shaft assembly 7-55 56P0449 Support decurl guide 7-55 56P0451 Right backup spring assembly 7-57 56P0452 Left backup spring assembly 7-57 56P0454 Wall support 7-55 56P0456 Duplex support plate 7-57 56P0457 Duplex support bracket 7-55 56P0458 Chassis - Lexmark C760 | Service Manual - Page 455
power outlet 7-59 56P0498 AC power 56P0531 E-clips, parts packet 7-59 56P0532 ITU guide 7-25 56P0561 Paper size sensor box assembly 7-59 56P0562 Feed cover 7-59 56P0563 Ring 7, elevator lift gear/elevator lift 7-59 56P0564 Kit, stabilizer with mounting screws 7-61 56P0566 Finisher install kit - Lexmark C760 | Service Manual - Page 456
Cable, HVPS control - transfer 7-37, 7-39 56P1503 Cable assembly - options bottom/paper size sensing 7-37, 7-41 56P1504 Restraint pad 7-20, 7-51 56P1506 Cable, fuser and Y cartridge motor 7-37 56P1507 Cable, C and M cartridge motor 7-37 56P1508 Cable, ITU and K cartridge motor 7-37 56P1509 - Lexmark C760 | Service Manual - Page 457
56P1556 220 V web oiler upgrade kit 1-17 56P1557 100 V web oiler upgrade kit 1-17 56P1558 Web oiler driver board assembly 7-9 56P1561 Cartridge contact assembly, complete black 7-28, 7-40 56P1563 Card assembly - fuser drive 7-10 56P1564 System board shield support with clips 7-16, 7-33 56P1565 - Lexmark C760 | Service Manual - Page 458
, 401/402 only 7-16 56P2847 ITU assembly 7-22 56P2848 ITU maintenance kit 6-4 56P2849 500 option deflector 7-53 56P2850 500-Sheet tray option, complete 7-51 56P2851 Fuser assembly, 115 V 500W 7-7 56P2852 Fuser assembly, 220 V 500W 7-7 56P2853 Fuser assembly, 100V 500W (Japan 7-7 56P2854 - Lexmark C760 | Service Manual - Page 459
220V fuser 6-4 56P2912 Maintenance kit 100V fuser 6-4 56P2916 Door assembly, right jam access 7-45 56P2917 Output expander assembly, mechanical linkage 7-43 56P2918 Right cover 7-43 56P2919 ESD brush cover 7-43 56P2930 Cover, right 7-47 56P2931 Latch, access door rear 7-47 56P2932 Support - Lexmark C760 | Service Manual - Page 460
relocation package assembly 500 drawer 7-76 7370566 Kit, relocation package assembly duplex 7-76 7370595 Kit, relocation package assembly finisher 7-76 7371549 Kit, relocation package assembly printer 7-76 88A0235 Screw type 323, parts packet 7-57 99A0052 Shaft assembly, lower exit, also order - Lexmark C760 | Service Manual - Page 461
5060-4xx 99A1741 Spring, diverter 7-49 99A1742 Sensor, 5-bin mailbox pass thru 7-47 99A1786 Gear, drive 7-47 99A1787 Deflector 7-49 99A1788 Retainer, R-ring 7-49 99A1789 Retainer, C-clip 7-49, 7-57 Part number index I-19 - Lexmark C760 | Service Manual - Page 462
5060-4xx I-20 Service Manual - Lexmark C760 | Service Manual - Page 463
- Lexmark C760 | Service Manual - Page 464
- Lexmark C760 | Service Manual - Page 465
- Lexmark C760 | Service Manual - Page 466
PC Cleaner Developer Roll TAR Toner Meter Cart Auger 1st Transfer Roll 2nd Transfer Roll ITU Drive / Back-up Rolls ITU Reverse Roll Fuser Hot Roll Fuser BUR Metering Rolls Color Charge Roll (CR)Short Component Planes Effected Cartridge ITU 2nd XferRoll ITU ITU Fuser Reference Edge C, M, or Y Cart
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 |
 |
Lexmark
™
C760, C762
5060-4xx
• Table of Contents
• Start Diagnostics
• Safety and Notices
• Trademarks
• Index
Lexmark and Lexmark with diamond design are
trademarks of Lexmark International, Inc., registered
in the United States and/or other countries.
Revised: July 2
7
, 2005