Revised: February, 2005
For the complete PDF manual please visit www.LaserPros.com. Lexmark OptraTM C710

5016-001

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.
Edition: February 2005 The following paragraph does not apply to any country where such provisions are inconsistent with local law: LEXMARK INTERNATIONAL, INC. PROVIDES THIS PUBLICATION AS IS WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Some states do not allow disclaimer of express or implied warranties in certain transactions; therefore, this statement may not apply to you. This publication could include technical inaccuracies or typographical errors. Changes are periodically made to the information herein; these changes will be incorporated in later editions. Improvements or changes in the products or the programs described may be made at any time. Comments may be addressed to Lexmark International, Inc., Department D22A/032-2, 740 West New Circle Road, Lexington, Kentucky 40550, U.S.A or e-mail at ServiceInfoAndTraining@Lexmark.com. Lexmark may use or distribute any of the information you supply in any way it believes appropriate without incurring any obligation to you. You can purchase additional copies of publications related to this product by calling 1-800-553-9727. In other countries, contact your point of purchase. Lexmark and Optra are trademarks of Lexmark International, Inc., registered in the United States and/or other countries. Color Jetprinter is a trademark of Lexmark International, Inc. Other trademarks are the property of their respective owners. Copyright Lexmark International, Inc. 2000, 2005. All rights reserved. UNITED STATES GOVERNMENT RESTRICTED RIGHTS This software and documentation are provided with RESTRICTED RIGHTS. Use, duplication or disclosure by the Government is subject to restrictions as set forth in subparagraph (c)(1)(ii) of the Rights in Technical Data and Computer Software clause at DFARS 252.227-7013 and in applicable FAR provisions: Lexmark International, Inc., Lexington, KY 40550.

P/N: 12G6111

Table of Contents
Notices and Safety Information. ix Laser Notices. ix General Information. 1-1 Models. 1-2 Standard Features. 1-2 Tools Required For Service. 1-6 Options. 1-7 Operational Theory. 1-8 Interlock Mechanism. 1-8 Sheet Bypass Paper Feed Unit. 1-9 Paper Feed Unit. 1-11 Second Paper Feed Unit (Optional Paper Trays). 1-13 Drive Block. 1-17 Contact Cam. 1-18 Coupling Unit. 1-19 Carriage Unit. 1-21 Toner Cartridge Unit. 1-22 Intermediate Transfer Unit. 1-24 Fuser/Paper Exit Unit. 1-27 Detecting New Cleaning Unit. 1-28 Duplex Unit (Option). 1-29 Diagnostic Information. 2-1 Start. 2-1 Service Error Codes. 2-2 User Status Messages. 2-7 User Attendance Messages. 2-13 Symptom Tables. 2-28 Base Printer Symptom Table. 2-28 Covers Interlock Symptom Table. 2-29 Duplex Unit Symptom Table. 2-29 Operator Panel Symptom Table. 2-30 Paper Feed Symptom Table. 2-30 Paper Tray Options Symptom Table. 2-31 Power Symptom Table. 2-31 Print Quality Symptom Table. 2-32 Service Checks. 2-34
5016-001 Base Printer Service Checks.2-35 Bypass Tray (Multipurpose Tray) Service Check.2-35 Carriage Unit Service Check.2-39 Coupling Unit Service Check.2-42 Cover Interlock Service Check.2-45 Developer/Paper Feed Motor Service Check.2-48 Erase Lamp Service Check.2-50 Fuser Cold Service Check.2-51 Fuser Drive and Contact Cam System Service Check.2-53 Fuser Hot Service Check.2-57 High Voltage Leakage Detect Service Check.2-58 ITM Drive Service Check.2-60 Main Fan Service Check.2-62 New Toner Cartridge Detection Service Check.2-63 Operator Panel Service Check.2-64 Operator Panel Buttons Service Check.2-65 OPC Drive Service Check.2-66 Paper Exit Sensor Service Check.2-67 Paper Feed Service Check.2-68 Parallel Port Service Check.2-71 Power Service Check.2-72 Printhead Service Check.2-77 Print Quality Service Checks.2-79 Print Quality Initial Service Check.2-79 All Black or Color Page Service Check.2-80 All Blank Page Service Check.2-81 Background Service Check.2-82 Black, Color Lines or Bands Service Check.2-83 Black or Color Spots Service Check.2-84 Developer Drive System Service Check.2-84 Evenly Spaced Horizontal Lines/Marks Service Check.2-85 Foggy Background Service Check.2-86 Low Image Density Service Check.2-87 Offset Print Service Check.2-88 Poor Color Reproduction Service Check.2-89 Random Marks Service Check.2-90 Residual Image Service Check.2-90 Skew Service Check.2-91 Toner on Backside of Page Service Check.2-91 Uneven Print Density Service Check.2-92 White Lines or Bands Service Check.2-92 White Spots Service Check.2-94 White/Black Lines Service Check.2-95

iv Service Manual

5016-001 Serial Port Service Check. 2-96 Toner Level Detect Service Check. 2-96 Toner Low/Empty Sensor Service Check. 2-97 Transfer Roll Service Check. 2-98 Tray 1 (Integrated Tray) Service Check. 2-99 Options Service Checks. 2-106 Flash Memory Option(s) Service Check. 2-106 DRAM Memory Option(s) Service Check. 2-106 Hard Disk Option Service Check. 2-107 Network Card Option Service Check. 2-108 250/250 Dual Paper Tray Service Check. 2-108 250/250 Paper Tray Symptom Table. 2-109 Duplex Unit Option Service Check. 2-120 Diagnostic Aids. 3-1 Print Quality Test Pages. 3-1 Paper Jam Sequence. 3-1 Disabling Download Emulations. 3-3 Diagnostics Menu Structure. 3-3 Diagnostic Mode. 3-4 Print Registration. 3-6 Print Tests. 3-8 Print Quality Test Pages. 3-9 Hardware Tests. 3-10 LCD Test. 3-10 Button Test. 3-10 Parallel Wrap Test. 3-11 ROM Memory Test. 3-12 SDRAM Memory Test. 3-13 Serial Wrap Test. 3-14 Duplex Tests. 3-15 Quick Test. 3-15 Duplex Feed 1. 3-15 Duplex Feed 2. 3-15 Device Tests. 3-16 Quick Disk Test. 3-16 Disk Test/Clean. 3-17 Flash Test. 3-18 Printer Setup. 3-19 Setting the Page Count. 3-19 Viewing the Permanent Page Count. 3-19 Serial Number. 3-19 Setting Configuration ID. 3-20
5016-001 Laser Power.3-21 Parallel Strobe Adjustment.3-21 Error Log.3-22 Viewing the Error Log.3-22 Clearing the Error Log.3-22 Restore EP Factory Defaults.3-22 Exiting Diagnostic Mode.3-23 Repair Information.4-1 Handling ESD-Sensitive Parts.4-1 Cover Removals.4-2 Cartridge Cover Removal.4-3 Front Cover Removal.4-3 Fuser Cover Removal.4-3 Left Side Cover Removal.4-3 Operator Panel Cover Removal.4-3 Rear Cover Removal.4-3 Right Side Cover Removal.4-4 Top Cover Removal.4-4 Top (Small) Cover Removal.4-4 Right Side Removals.4-5 Carriage Drive Motor Removal.4-6 Coupling Drive Motor Removal.4-7 Developer Drive Motor Assembly Removal.4-7 Fuser Drive Motor Removal.4-8 OPC Drive Motor Removal.4-9 Cam Sensor Removal.4-9 LVPS Assembly Removal.4-10 Main Fan Removal.4-12 Main Fan Mounting Bracket Removal.4-12 Motor Mounting Stay C Assembly Removal.4-13 OPC Coupling Drive Block Assembly Removal.4-14 Solenoid Removal.4-14 Left Side Removals.4-15 Grid Block 1 Assembly Removal.4-16 Grid Block 2 Assembly Removal.4-17 Cable Cover 3 Removal.4-18 Cover Interlock Switch Removal.4-18 Micro Switch Removal.4-18 Electronics Removals.4-19 Controller Board Assembly Removal.4-19 Engine Board Assembly Removal.4-19 HVPS Board Assembly Removal.4-20

vi Service Manual

5016-001 Interconnect Board Assembly Removal. On/Off Coupling Sensor Board Removal. Paper Sensor Board. Resist Sensor Board Removal. Waste Toner Board Assembly Removal. Fuser Unit. Fuser Unit Removal. Fuser Lamp Removal. Thermistor and Thermostat Removal. Main Body. Paper Feed Block Assembly Removal. Printhead Removal. Print Cartridge Carousel Removal. Carriage Home Position Sensor Removal. Registration Roll Removal. 4-21 4-21 4-21 4-22 4-22 4-23 4-23 4-23 4-23 4-24 4-24 4-24 4-25 4-26 4-27
Connector Locations. 5-1 Engine Board. 5-1 LVPS (Low Voltage Power Supply). 5-3 Erase Lamp Board. 5-3 TRAY 1 Sensor Board. 5-3 TRAY 1 Registration Sensor Board. 5-4 Waste Toner Sensor Board. 5-4 Belt Position Sensor Board. 5-5 Connector Locations for Options. 5-6 2nd Paper Option (250/250 Paper Option). 5-6 2nd Paper Option (250/250 Paper Option). 5-7 LVPS (Internal 2nd Tray Option). 5-7 Duplex Unit Option. 5-8 LVPS (Internal Automatic Duplex Option). 5-9 Electrical Components. 5-10 Sensor/Switch Locations. 5-10 Printer Circuit Board Locations. 5-13 Fan/Motor Locations. 5-13 Solenoid/Clutch Locations. 5-14 250/250 Paper Tray Option. 5-15 Duplex Option. 5-15 Cable Connections. 5-16
5016-001 Preventive Maintenance.6-1 Safety Inspection Guide. Service Precautions. Cleaning Procedures. Lubrication Specifications...6-1.6-1.6-1.6-1
Parts Catalog.7-1 How To Use The Parts Catalog.7-1 Assembly 1: Fuser.7-2 Assembly 2: Fuser.7-4 Assembly 3: Transfer.7-8 Assembly 4: Frames.7-10 Assembly 5: Frames Left Side.7-12 Assembly 6: Frames Right Side.7-16 Assembly 7: Frames Right Side 2.7-20 Assembly 8: Frames Right Side 3.7-24 Assembly 9: Carriage Block.7-26 Assembly 10: Base Frame.7-28 Assembly 11: Front Cover Assembly.7-30 Assembly 12: Front Cover Assembly 2.7-34 Assembly 13: Feed Unit.7-38 Assembly 14: Laser Scanner Unit.7-40 Assembly 15: Cassette.7-44 Assembly 16: Upper Covers.7-46 Assembly 17: Covers.7-50 Assembly 18: Covers / Frame 250 Tray Option.7-52 Assembly 19: Middle Roll Unit 250 Tray Option.7-56 Assembly 20: 250/250 Tray Option Lower Unit.7-58 Assembly 21: Duplex Unit Option 2.7-60 Assembly 22: Cassette Upper Section.7-64 Assembly 23: Cassette Rear Section 1.7-66 Assembly 24: Cassette Rear Section 2.7-68 Assembly 25: Duplex Option Lower Section 1.7-70 Assembly 26: Duplex Option Lower Section 2.7-74 Assembly 27: Duplex Option Lower Section 3.7-76 Assembly 28: Cassette Lower Section 4.7-78 Assembly 29: Duplex Option Lower Section 5.7-80 Assembly 30: Miscellaneous.7-84 Index. I-1

For the complete PDF manual please visit www.LaserPros.com.

viii Service Manual

Quick Reference
Lexmark Optra C710 Color Laser Printer

Operator Panel

Overview of Printer Menus
Menus or menu items in italics are displayed only when the required option is installed. Capitalized menu items (for example, PAPER SIZE) have submenus.

SUPPLIES MENU

1 Menu 2 Select 3 Return 4 <color> Toner Tray 1 Status Tray 2 Status Tray 3 Status Coating Roll Transfer Belt

COLOR MENU

Color Correction Print Resolution Image Enhancement

PAPER MENU

Paper Source PAPER SIZE PAPER TYPE PAPER WEIGHT CUSTOM TYPES Substitute Size Configure MP Paper Loading

FINISHING MENU

Duplex Duplex Bind Copies Blank Pages Collation Separator Sheets Separator Source Multipage Print Multipage Order Multipage View Multipage Border

UTILITIES MENU

Print Menus Print Net1 Setup Print Net2 Setup Print Net3 Setup Print Fonts Print Directory Factory Defaults Format Flash Defragment Flash Format Disk Job Acct Stat Hex Trace CHANGE TONER

Stop 6

Press <Menu> to: Enter the menus from the ready state Scroll through menus or values Increase or decrease a numerical value Display the Job Menu or the Supplies Menu while the printer is busy Press Select to: Select the item on the second line of the display Save the selection as a new default setting Press Return to: Back up to the previous menu level Press Stop to: Temporarily stop all print activity without losing data Press Go to: Exit printer menus and return to the ready state Clear messages

JOB MENU

Cancel Job Reset Printer Print Buffer CONFIDENTIAL JOB HELD JOBS

SETUP MENU

Printer Language Power Saver Resource Save Download Target Print Timeout Wait Timeout Auto Continue Jam Recovery Page Protect Print Area Display Language Alarm Control Toner Alarm Job Buffer Size Job Accounting Job Acct Limit

PCL EMUL MENU

Font Source Font Name Point Size Pitch Symbol Set Orientation Lines per Page A4 Width Auto CR after LF Auto LF after CR TRAY RENUMBER

POSTSCRIPT MENU

Print PS Error Font Priority Image Smoothing

PARALLEL MENU

STD PARALLEL PARALLEL OPT 1 PARALLEL OPT 2 PARALLEL OPT 3 PCL SmartSwitch PS SmartSwitch NPA Mode Parallel Buffer Job Buffering Advanced Status Protocol Honor Init Parallel Mode 1 Parallel Mode 2

SERIAL MENU

STANDARD SERIAL SERIAL OPTION 1 SERIAL OPTION 2 SERIAL OPTION 3 PCL SmartSwitch PS SmartSwitch NPA Mode Serial Buffer Job Buffering RS-232/RS-422 RS-422 Polarity Serial Protocol Robust XON Baud Data Bits Parity Honor DSR

NETWORK MENU

NETWORK OPTION 1 NETWORK OPTION 2 NETWORK OPTION 3 PCL SmartSwitch PS SmartSwitch NPA Mode Network Buffer Job Buffering NETWORK x SETUP

INFRARED MENU

Infrared Port PCL SmartSwitch PS SmartSwitch NPA Mode Infrared Buffer Job Buffering Window Size Transmit Delay Max Baud Rate

LOCALTALK MENU

LocalTalk Port PCL SmartSwitch PS SmartSwitch NPA Mode LocalTalk Buffer Job Buffering NPA Hosts LocalTalk Name LocalTalk Addr LocalTalk Zone

USB MENU

USB OPTION 1 USB OPTION 2 USB OPTION 3 PCL SmartSwitch PS SmartSwitch NPA Mode USB Buffer Job Buffering

FAX MENU

Fax Port Fax Baud Fax Data Bits Fax Parity Fax Buffer Job Buffering Fax Paper Size Fax Paper Type FAX SETUP FAX LOGS FAX SEND FAX RECEIVE
Loading Paper and Transparencies
Important! Move the rear and side guides to properly position the guides for the media size. Note: Labels and card stock can only be used in the multipurpose feeder. Transparencies can only be fed from the multipurpose feeder or tray 1. Important! Recommended Lexmark transparencies are P/N 12A5150 (letter) or P/N 12A5151 (A4).
Clearing Printer Paper Jams

Printer Paper Path

Top output bin
Clearing Duplex Unit Paper Jams

Duplex Unit Paper Path

Message
202 Paper Jam 201 Paper Jam 250 Paper Jam 24x Paper Jam

Location

Fuser and output rollers Transfer belt and fuser Multipurpose feeder Paper tray
230 Paper Jam 231 Paper Jam 232 Paper Jam
Top duplex assembly Rear duplex assembly Duplex unit base and tray

Adjust Guides

Flex Paper 202 Paper Jam - Fuser and Output Rollers
1 Open the fuser cover, fuser door, and front cover. 2 Remove coating roll. 3 Carefully remove jammed paper. 4 Close the front cover, fuser door, and fuser cover. Note: Paper jammed in the fuser rollers must be removed from the underside of the fuser.
Paper face up top edge entering printer
230 Paper Jam - Top Duplex Assembly

1 Open the top duplex assembly door. 2 Carefully remove jammed paper. 3 Close the top duplex assembly door.

Paper or transparencies

201 Paper Jam - Transfer Belt and Fuser
1 Open the front cover. 2 Carefully remove any jammed paper. 3 Close the front cover.
231 Paper Jam - Rear Duplex Assembly
1 Open the rear cover. 2 Carefully remove any jammed paper. 3 Close the rear cover.

Load Paper Tray

Rear guide

Maximum stack height

250 Paper Jam - Multipurpose Feeder
232 Paper Jam - Duplex Unit Base and Tray
1 Completely remove duplex unit inverter tray. 2 Carefully remove jammed paper (check inside duplex unit base). 3 Insert duplex unit inverter tray into duplex unit.

Multipurpose Feeder

24x Paper Jam - Check Paper Tray x
1 Remove the paper tray. 2 Carefully remove any jammed paper. 3 Place the tray inside the printer. Note: You may have to remove the drawer above the paper jam or clear the jam from inside the front cover.
Paper face down top edge entering printer Envelope face down with flap to the right Copyright Lexmark International, Inc. 1999. All rights reserved. Printed in U.S.A. This document is printed on recycled paper. 9/99 E.C. 1C0105 P/N 10E0243