Xerox WorkCentre PE120 User manual

Service
Manual

WorkCentre®PE120/120i
Service Manual
Warning
The following servicing instructions are for use by qualified service personnel only. To avoid personal
injury, do not perform any servicing other than that contained in the operating instructions, unless you
are qualified to do so.
First Printing: September 2004
071-0874-00

Copyright © 2004 Xerox Corporation. All Rights Reserved. Unpublished rights reserved under the copyright laws of the United States. Contents of
this publication may not be reproduced in any form without permission of Xerox Corporation.
Copyright protection claimed includes all forms of matters of copyrightable materials and information now allowed by statutory or judicial law or
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As an ENERGY STAR®partner, Xerox Corporation has determined that this product meets the ENERGY STAR guidelines for energy efficiency. The
ENERGY STAR name and logo are registered U.S. marks.
MD/SH

Table of Contents
i
Contents
1 Precautions
1.1 Safety Warnings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
1.2 Safety Cautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
1.2.1 Toxic Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
1.2.2 Electric Shock and Fire Safety Precautions. . . . . . . . . . . . . . . . . . . . . . . . . .1-2
1.2.3 Handling Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3
1.2.4 Assembly and Disassembly Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3
1.2.5 Bodily Injury Warnings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
1.3 ESD Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
2 Reference Information
2.1 Tools for Troubleshooting the system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
2.2 Common Acronyms and Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2
2.3 Selecting a Location for the system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-4
3 Specifications
3.1 General Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
3.2 Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2
3.3 Environmental Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2
3.4 Routine Maintenance Items and Consumables . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2
3.5 Media Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3
3.6 Print Engine Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4
3.7 Scan Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-5
3.8 Copy Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-6
3.8.1 Telephone Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-7
3.9 Fax Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-8
4 Product Summary
4.1 Printer Components - Front View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
4.1.2 Rear View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2
4.1.3 Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3
4.2 System Layout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-5
4.2.1 Scanner Paper Path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-5
4.2.2 Print Engine Paper Path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-5
4.2.3 Print Engine Paper Path Rollers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-6
4.3 System Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-6
4.3.1 Paper Feed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-8
4.2.4 Transfer Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-8
4.2.5 Drive Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-8
4.2.6 Fuser Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-8
4.2.7 Laser Scanner Unit (LSU). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-9
4.2.8 Toner Cartridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-10

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ii
4.3 Main Controller Board (PBA). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-11
4.3.1 ASIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-12
4.3.2 Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-13
4.3.3 Flash Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-13
4.3.4 SDRAM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-13
4.3.5 Battery Backup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-13
4.3.6 Sensor Input Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-13
4.4 Switching Mode Power Supply (SMPS) and High Voltage Power Supply (HVPS)4-15
4.4.1 High Voltage Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-15
4.4.2 Switching Mode Power Supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-17
4.4.3 Fuser AC Power Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-18
4.5 Engine F/W . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-18
4.5.1 Feeding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-18
4.5.2 Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-19
4.5.3 Transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-19
4.5.4 Fusing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-19
4.6 OPE (Control Panel) PBA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-20
4.7 USB Host. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-20
4.8 Fax Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-20
4.8.1 Modem. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-20
4.8.2 LIU PBA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-21
4.8.3 Tel-Line Connection Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-21
4.8.4 Transformer Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-22
4.8.5 On Hook State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-22
4.8.6 Off Hook State. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-22
4.8.7 Signal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-23
5 Disassembly
5.1 Precautions for Disassembly/Reassembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
5.1.1 Precautions When Removing Circuit Boards . . . . . . . . . . . . . . . . . . . . . . . .5-1
5.2 Rear Cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-2
5.3 Side Covers Right and Left . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-3
5.4 Front Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-4
5.5 Scanner Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-4
5.6 ADF Motor Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-8
5.7 OPE (Control Panel) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-9
5.8 Middle Cover and Exit Roller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-10
5.9 Controller Shield Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-11
5.10 Engine Shield and Exit Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-12
5.11 SMPS and LIU. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-13
5.12 Fuser Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-14
Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-14
Heat Roller and Halogen Lamp . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-14
Guide and Fuser Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-14
Thermistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15
5.13 Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-15
5.14 Laser Scanner Unit (LSU). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-16
5.15 CRUM Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-16
5.16 Drive Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-17

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5.17 Cover Mid Front . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-17
5.18 Transfer Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-18
5.19 Feed Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-18
5.20 Pick Up Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-20
MP or Main Cassette Pick Rollers . . . . . . . . . . . . . . . . . . . . . . . . . 5-21
6 Alignment and Adjustments
6.1 Paper Path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1
6.1.2 Copy and Scan Paper Path. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-2
6.1.3 Printer Paper Path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-2
6.2 Clearing Paper Jams. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-3
6.2.1 Clearing ADF Jams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-4
6.2.1.1 ADF Misfeed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4
6.2.1.2 ADF Exit Misfeed or ADF Roller Misfeed . . . . . . . . . . . . . 6-4
6.2.2 Jam 0 - Paper in the Feed Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-5
6.2.3 Jam 1 - Paper in the Fuser Area or Around the Toner Cartridge. . . . . . . . . .6-5
6.2.4 Jam 2 - Paper in the Exit Area. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-6
6.2.5 MP Tray Jam - Paper in the Bypass Tray . . . . . . . . . . . . . . . . . . . . . . . . . . .6-6
6.3 Control Panel Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-7
6.4 Tech Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-8
6.4.1 Entering Tech Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-8
6.4.2 Tech Mode Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-8
6.4.3 Data Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-8
6.4.4 Machine Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-10
6.4.5 Report . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-10
6.5 Engine Test Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-11
6.5.1 Entering Engine Test Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-11
6.5.3 Detailed Description Engine Test Mode . . . . . . . . . . . . . . . . . . . . . . . . . . .6-12
6.6 Identify Sale Date . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-13
6.8 Periodic Defective Image or Abnormal Printing. . . . . . . . . . . . . . . . . . . . . . . . . . .6-14
6.9 Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-15
7 Troubleshooting
7.1 Paper Feed Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-1
7.1.1 Wrong Print Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-1
7.1.2 Jam 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-1
7.1.3 Jam 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-2
7.1.4 Jam 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-2
7.2.5 Multiple Pick . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-3
7.2.6 Paper Rolled in the Fuser. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-3
7.2.7 Paper Rolled in the OPC Drum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-3
7.2.8 Defective ADF. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-4

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7.2 System Malfuction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-5
7.2.1 LCD Display is Defective . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-5
7.2.2 Defective Control Panel Keypad. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-5
7.2.3 Fuser Gear Melted Due to Overheating, Causing a Paper Jam . . . . . . . . . . .7-5
7.2.4 Paper Empty Error. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-6
7.2.5 Paper Empty Error Without Indication . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-6
7.2.6 Cover Open . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-6
7.2.7 No Error Message when the Cover is Open . . . . . . . . . . . . . . . . . . . . . . . . .7-6
7.2.8 Defective Motor Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-7
7.2.9 No Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-7
7.2.10 Printed Vertical Lines Become Curved. . . . . . . . . . . . . . . . . . . . . . . . . . . .7-7
7.3 Print Quality Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-8
7.3.1 Wrong Print Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-8
7.3.2 Vertical White Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-8
7.3.3 Horizontal Black Band . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-9
7.3.4 Black/White Spot. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-9
7.3.5 Light Image . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-10
7.3.6 Dark Image or Completely Black Print. . . . . . . . . . . . . . . . . . . . . . . . . . . .7-10
7.3.7 Uneven Density . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-11
7.3.8 Background Contamination. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-11
7.3.9 Ghosting 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-12
7.3.10 Ghosting 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-12
7.3.11 Ghosting 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-13
7.3.12 Ghosting 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-13
7.3.13 Stains on the Front of the Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-13
7.3.14 Stains on the Back of the Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-14
7.1.15 Blank Page is Printed 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-14
7.3.16 Blank Page is Printed 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-14
7.4 Fax and Phone Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-15
7.4.1 No Dial Tone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-15
7.4.2 Defective MF Dial. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-15
7.4.3 Defective FAX FORWARD/RECEIVE . . . . . . . . . . . . . . . . . . . . . . . . . . .7-16
7.4.4 Defective FAX FORWARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-16
7.4.5 Defective FAX RECEIVE 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-16
7.4.6 Defective FAX RECEIVE 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-16
7.4.7 Defective FAX RECEIVE 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-17
7.4.8 Defective FAX RECEIVE 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-17
7.4.9 Defective Automatic Receiving. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-17
7.5 Copy Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-18
7.5.1 White Copies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-18
7.5.2 Black Copies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-18
7.5.3 Abnormal Noise. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-18
7.5.4 Defective Image Quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-18
7.6 Scanning Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-19
7.6.1 PC Scanning Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-19
7.6.2 Poor Quality Output of PC Scanned Images . . . . . . . . . . . . . . . . . . . . . . . .7-19
7.7 Toner Cartridge Servicing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-20
7.7.1 Precautions for Toner Cartridges. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-20
7.7.2 Toner Cartridge Life . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-20
7.7.3 Redistributing Toner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-20

ServiceManual 1-v
7.9 Software Problems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-21
7.9.1 The Printer is Not Responding to the Print Command . . . . . . . . . . . . . . . .7-21
7.8.2 The Printer is Not Responding to a Print Command or
Strange Fonts are Printing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-21
7.8.3 SPOOL Error. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-22
7.9 Networking Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-22
8 Parts List
8.1 Main Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-2
8.2 Main Drive Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-5
8.3 ADF Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-6
8.4 Control Panel OPE Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-10
8.5 Scanner Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-12
8.6 Middle Cover Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-14
8.7 Frame Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-15
8.8 Fuser Unit Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-18
8.9 MP Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-20
8.10 Tray 1 (Cassette) Unit Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-22
8.11 Tray 2 (SCF - Optional Cassette) Unit Assembly. . . . . . . . . . . . . . . . . . . . . . . . .8-24
Xerox Options and Accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-26
9BlockDiagram
10 Connection Diagram

1-vi WorkCentre PE 120/120i

Precautions
ServiceManual 1-1
In order to prevent accidents and to prevent damage to the system, please read the precautions listed below
carefully before servicing the system.
1.1 Safety Warnings
1. Only to be serviced by appropriately qualified service engineers.
High voltages and lasers inside this product are dangerous. This system should only be serviced by a suitably
trained and qualified service engineer.
2. Use only Xerox replacement parts.
There are no user serviceable parts inside the system. Do not make any unauthorized changes or additions to
the system, these could cause the system to malfunction and create electric shock or fire hazards.
3. Laser Safety Statement: The system is certified in the U.S. to conform to the requirements of DHHS 21 CFR,
chapter 1 Subchapter J for Class 1 laser products, and elsewhere, it is certified as a Class 1 laser product
conforming to the requirements of IEC 825. Class 1 laser products are not considered to be hazardous. The
laser system and system are designed so there is never access to laser radiation above a Class 1 level during
normal operation, user maintenance, or prescribed service condition.
Warning
Never operate or service the system with the protective cover removed from Laser assembly. The reflected
beam, although invisible, can damage your eyes. When using this product, these basic safety precautions
should always be followed to reduce the risk of fire, electrical shock, and bodily injury.
1Precautions
CAUTION - INVISIBLE LASER RADIATION
WHEN THIS COVER OPEN.
DO NOT OPEN THIS COVER.
VORSICHT - UNSICHTBARE LASERSTRAHLUNG,
WENN ABDECKUNG GEÖFFNET.
NICHT DEM STRAHL AUSSETZEN.
ATTENTION - RAYONNEMENT LASER INVISIBLE EN CAS
D’OUVERTURE. EXPOSITION DANGEREUSE
AU FAISCEAU.
ATTENZIONE - RADIAZIONE LASER INVISIBILE IN CASO DI
APERTURA. EVITARE L’ESPOSIZIONE AL
FASCIO.
PRECAUCION - RADIACION LASER IVISIBLE CUANDO SE ABRE.
EVITAR EXPONERSE AL RAYO.
ADVARSEL. - USYNLIG LASERSTRÅLNING VED ÅBNING, NÅR
SIKKERHEDSBRYDERE ER UDE AF FUNKTION.
UNDGÅ UDSAETTELSE FOR STRÅLNING.
ADVARSEL. - USYNLIG LASERSTRÅLNING NÅR DEKSEL
ÅPNES. STIRR IKKE INN I STRÅLEN.
UNNGÅ EKSPONERING FOR STRÅLEN.
VARNING - OSYNLIG LASERSTRÅLNING NÄR DENNA DEL
ÄR ÖPPNAD OCH SPÄRREN ÄR URKOPPLAD.
BETRAKTA EJ STRÅLEN. STRÅLEN ÄR FARLIG.
VARO! - AVATTAESSA JA SUOJALUKITUS OHITETTAESSA
OLET ALTTIINA NÄKYMÄTTÖMÄLLE LASER-
SÄTEILYLLE ÄLÄ KATSO SÄTEESEEN.

Precautions
1-2 WorkCentre PE 120/120i
1.2 Safety Cautions
1.2.1 Toxic Material
This product contains toxic materials that can cause illness if ingested.
1. Please keep toner cartridges away from children. The toner powder contained in the toner cartridge can be
harmful and if swallowed you should contact a doctor immediately.
1.2.2 Electric Shock and Fire Safety Precautions
Failure to use the following instructions can cause electric shock or potentially cause a fire:
1. Use only the correct voltage, failure to do so could damage the system and potentially cause a fire or electric
shock.
2. Use only the power cable supplied with the system. Use of an incorrectly specified cable could cause the cable
to overheat and potentially cause a fire hazard.
3. Do not overload the power socket, this can lead to overheating of the cables inside the wall and could lead to a
fire hazard.
4. Do not allow water or other liquids to spill into the system, this can cause electric shock. Do not allow paper
clips, pins, or other foreign objects to fall into the system as these could cause a short circuit leading to electric
shock or fire hazard.
5. Never touch the plugs on either end of the power cable with wet hands, this can cause electric shock. When
servicing the system, remove the power plug from the wall socket.
6. Use caution when inserting or removing the power connector. The power connector must be inserted
completely otherwise poor contact could cause overheating possibly leading to a fire. When removing the
power connector, grip it firmly and pull.
7. Do not allow the power cable to become twisted, bent sharply around corners or become damaged. Do not
place objects on top of the power cable. If the power cable is damaged, it can overheat and cause a fire or
exposed cables can cause electrical shock. Replace a damaged power cable immediately, do not reuse or repair
the damaged cable. Some chemicals can eat through the coating on the power cable, weakening the cover, or
exposing cables causing fire and shock risks.
8. Ensure that the power sockets and plugs are not cracked or broken in any way. Any defects should be repaired
or replaced immediately. Take care not to cut or damage the power cable or plugs when moving the system.
9. Use caution during thunder or lightening storms. Xerox recommends that this system be disconnected from the
power source when these weather conditions are present. Do not touch the system or the power cord if it is still
connected to the wall socket in these weather conditions.
10. Avoid damp or dusty areas, install the system in a clean well ventilated location. Do not position the system
near a humidifier. Damp and dust build up inside the system can lead to overheating and cause a fire.
11. Do not position the system in direct sunlight. This will cause the temperature inside the system to rise leading
to the system failing to work properly and in extreme conditions could lead to a fire.
12. Do not insert any metal objects into the system through the ventilator fan or other parts of the casing, it could
come into contact with a high voltage conductor inside the system and cause an electric shock.

Precautions
ServiceManual 1-3
1.2.3 Handling Precautions
The following instructions are for personal safety, to avoid injury, and to avoid damaging the system:
1. Ensure the system is installed on a level surface, capable of supporting its weight. Failure to do so could cause
the system to tip or fall.
2. The system contains many rollers, gears, and fans. Take great care to ensure that you do not catch your fingers,
hair, or clothing in any of these rotating devices.
3. Do not place any small metal objects, containers of water, chemicals, or other liquids close to the system which
if spilled could get into the system and cause damage, electric shock, or a fire hazard.
4. Do not install the system in areas with high dust or moisture levels, beside an open window, or close to a
humidifier or heater.
5. Do not place candles or burning cigarettes on the system. These can cause a fire.
1.2.4 Assembly and Disassembly Precautions
Always use Xerox parts. Take care to note the exact location of parts and cable routing before disassembling any
part of the system. Ensure all parts and cables are replaced correctly.
Please use the following procedures before disassembling or replacing any parts:
1. Check the contents of the system memory and make a note of any user settings. These will be erased if the
mainboard or network card is replaced.
2. Ensure that power is disconnected from the wall socket before servicing or replacing any electrical parts.
3. Disconnect system interface cables and power cables before servicing or replacing any parts.
4. Only use approved spare parts. Ensure that part number, product name, any voltage, current, or temperature
rating are correct.
5. When removing or re-fitting any parts do not use excessive force, especially when fitting screws into plastic.
6. Take care not to drop any small parts into the system.
Handling of the OPC Drum
The OPC Drum can be irreparably damaged if the following instructions are not used:
■Exposure to light. Take care not to expose the OPC Drum either to direct sunlight or to fluorescent or
incandescent room lighting. Exposure for as little as 5 minutes can damage the surface photoconductive
properties and will result in print quality degradation. Take extra care when servicing the system. Remove
the OPC Drum and store it in a black bag or other lightproof container.
■Take care when working with the covers open, as light is admitted to the OPC area and can damage the
OPC Drum.
■Take care not to scratch the green surface of OPC Drum Unit.
■If the green surface of the Drum Cartridge is scratched or touched, the print quality will be compromised.

Precautions
1-4 WorkCentre PE 120/120i
1.2.5 Bodily Injury Warnings
1. Use caution around internal components.
The fuser unit works at a high temperature. Use caution when working on the system. Wait for the fuser to cool
down before disassembly.
2. Use caution when working around rotating parts or moving gears.
When operating the system, do not put your hands into any moving parts (Paper feeding entrance, motor, fan,
etc.). Remove jewelry and loose clothing before servicing the system.
3. This system weighs 15.6 kg. Use safe lifting and handling techniques. Use the lifting handles located on each
side of the system. Back injury could result if you do not lift the system properly.
4. Ensure the system is installed properly.
5. Ensure the system is installed on a flat, level surface, capable of supporting its weight. Failure to do so could
cause the system to tip or fall possibly causing personal injury or damaging the system.
6. Do not install the system on a sloping or unstable surface. After installation, double check that the system is
stable.

Precautions
ServiceManual 1-5
1.3 ESD Precautions
Some semiconductor components, and the respective sub-assemblies that contain them, are vulnerable to damage
by Electro-Static Discharge (ESD). These components include Integrated Circuits (ICs), Large-Scale Integrated
circuits (LSIs), field-effect transistors, and other semiconductor chip components. The following techniques will
reduce the occurrence of component damage caused by static electricity.
Be sure the power is off to the chassis or circuit board, and observe all other safety precautions.
■Immediately before handling any semiconductor components assemblies, drain the electrostatic charge from
your body. This can be accomplished by touching an earth ground source or by wearing a wrist strap device
connected to an earth ground source. Wearing a wrist strap will also prevent accumulation of additional bodily
static charges. Be sure to remove the wrist strap before applying power to the unit under test to avoid potential
shock.
■After removing a static sensitive assembly from its anti-static bag, place it on a grounded conductive surface. If
the anti-static bag is conductive, you may ground the bag and use it as a conductive surface.
■Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage some
devices.
■Do not remove a replacement component or electrical sub-assembly from its protective package until you are
ready to install it.
■Immediately before removing the protective material from the leads of a replacement device, touch the
protective material to the chassis or circuit assembly into which the device will be installed.
■Minimize body motions when handling unpackaged replacement devices. Motion, such as your clothes
brushing together, or lifting a foot from a carpeted floor, can generate enough static electricity to damage an
electro-statically sensitive device
■Handle IC’s and EPROM’s carefully to avoid bending pins.
■Pay attention to the direction of parts when mounting or inserting them on Printed Circuit Boards (PCB’s).

Precautions
1-6 WorkCentre PE 120/120i

Reference Information
ServiceManual 2-1
This section contains a tools list, list of abbreviations used in this manual, and a clearance required specification
when installing the WorkCentre PE120/120i.
2.1 Tools for Troubleshooting the system
The following tools are recommended for safe and easy troubleshooting as described in this service manual:
■Digital Voltage Meter (DVM)
■Screwdrivers
■Tweezers
■Cotton swabs
■Cleaning equipment: dry, lint-free cloth and/or mild detergent
■Type II Toner Vacuum
■Soft bristle brush
2Reference Information

Reference Information
2-2 WorkCenter PE 120/120i
2.2 Common Acronyms and Abbreviations
The following table covers the acronyms and abbreviations that may be used in this manual.
Definition Definition
AC Alternating Current EP Electro Photographic
ADC Analog-to-Digital Converter EPP Enhanced Parallel Port
AP Access Point F/W Firmware
ASIC Application Specific Integrated Circuit FCF/FCT Tray 1 or First Cassette Feeder
Ass’y Assembly FIFO First In First Out or Front In Front Out
BIOS Basic Input Output Sytem FISO Front In Side Out
BLDC Motor Brushless Dc Motor FPOT First Print Out Time
CMOS Complementary Metal Oxide
Semiconductor
GDI Graphic Device Interface
GIF Graphic Interchange Format
GND Ground
CN or CON Connector HBP Host Based Printing
CPU Central Processing Unit HDD Hard Disk Drive
CRUM Customer Replaceable Unit Memory HTML Hyper Text Markup Language
dB Decibel HV High Voltage
dBA A Weighted Decibel HVPS High Voltage Power Supply
dBm Decibel Milliwatt I/F Interface
DC Direct Current I/O Input/Output
DCU Diagnostic Control Unit IC Integrated Circuit
DIMM Dual In-line Memory Module ICC International Color Consortium
DPI Dots Per Inch IDE Intelligent/integrated Drive Electronics
DRAM Dynamic Random Access Memory IEEE Institute of Electrical and Electronics
Engineers, Inc.
DVM Digital Voltmeter IIT Image Input Terminal (Scanner)
ECM Error Correction Mode IOT Image Output Terminal (Print Engine)
ECP Enhanced Capability Port IPA Isopropyl Alcohol
ECU Engine Control Unit IPC Inter Process Communication
EEPROM Electronically Erasable
Programmable Read Only Memory
IPM Images Per Minute
EMI Electro Magnetic Interference ITB Image Transfer Belt (Transfer Belt)

Reference Information
ServiceManual 2-3
LAN Local Area Network PPM Pages Per Minute
lb. Pound(s) PS PostScript
LBP Laser Beam system PTL Pre-Transfer (Erase) Lamp
LCD Liquid Crystal Display PWM Pulse Width Moduration
LED Light Emitting Diode Q’ty Quantity
LSU Laser Scanner Unit RAM Random Access Memory
LVPS Low Voltage Power Supply
MB Megabyte RET Resolution Enhancement Technology
MDMC Multiple Document Multiple Copies ROM Read Only Memory
MHz Megahertz SDMC Single Document Multiple Copies
MPBF Mean Prints Between Failure SCF/SCT Tray 2 Or Second Cassette Feeder
MPF/MPT Multi-Purpose Tray SMPS Switching Mode Power Supply
MPU Main Processing Unit SPGPm Samsung system Graphic Processor
NIC Network Interface Card SPL Samsung Printing Language
NPC Network system Card Spool Simultaneous Peripheral Operation Online
NVRAM Non-volitale Random Access Memory SURF Surface Rapid Fusing
OPC Organic Photo Conductor SW Switch
OPE Operator Control Panel Sync Synchronous
PABX/PSTN Public Telephone Network T1 ITB or Transfer Belt Imaging
PBA Print Board Assembly T2 Transfer Roller Imaging
PCI Peripheral Component Interconnect TAD Telephone Answering Device
PCL system Command Language TRC Toner Reproductive Curve
PDF Portable Document Format URL Uniform Resource Locator
PDL Page Description Language USB Universal Serial Bus
Ping Packet Internet or Inter-network
Grouper
WHQL Windows Hardware Quality Lab
PnP Plug-n-Play
PPD PostScript Printer Description
Definition Definition

Reference Information
2-4 WorkCenter PE 120/120i
2.3 Selecting a Location for the system
■Leave enough room to open the ADF, system trays, covers, and allow for proper ventilation
■Provide the proper environment
■A sturdy, level surface
■Away from the direct airflow of air conditioners, heaters, or ventilators
■Free from extreme fluctuations in temperature, sunlight, or humidity
■Clean, dry, and free from excessive dust