Xerox DocuPrint N2025 User manual

Service
Manual

XEROX
Xerox DocuPrint N2025/N2825
Network Laser Printer Service Manual
721P52440
February 2000 This Service Manual contains information
that applies to the DocuPrint N2025/N2825
Laser Printer.
CAUTION
These components are susceptible
to electrostatic discharge. Observe
all ESD procedures to avoid
damage.
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DocuPrint N2025/N2825
02/2000
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Initial Issue
Table of Contents
Title - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Page
Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - iv
Organization - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - v
Revision Control List - - - - - - - - - - - - - - - - - - - - - - - - - - viii
Service Call Procedures - - - - - - - - - - - - - - - - - - - - - - - - 1-1
Section Contents - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-1
Repair Analysis Procedures - - - - - - - - - - - - - - - - - - - - - 2-1
Section Contents - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-1
Image Quality Repair Procedures - - - - - - - - - - - - - - - - - 3-1
Section Contents - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-1
Repair/Adjustments - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-1
Section Contents - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-1
Parts List - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-1
Section Contents - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-1
General Procedures - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-1
Section Contents - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-1
Wiring Data- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7-1
Section Contents - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7-1
Introduction
The DocuPrint N2025/N2825 Service Manual is the primary document
used for repairing and maintaining the DocuPrint N2025/N2825 Laser
Printers.
This manual contains Service Call Procedures, Diagnostic Procedures,
General Information, Repair Analysis Procedures, Image Quality
Analysis Procedures, Wiring Data, and Parts Lists that will enable the
Service Representative to repair DocuPrint N2025/N2825 failures.
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DocuPrint N2025/N2825 02/2000
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Page Revision Page Revision Page Revision Page Revision Page Revision Page Revision
Initial Issue
Product:
DocuPrint N2025/N2825 Laser Printer
Title:
Xerox DocuPrint N2025/N2825 Network
Laser Printer Service Manual
Part Number:
721P52440
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02/2000
DocuPrint N2025/N2825
Repair-Adjustment
Initial Issue
4 Repair-Adjustment
Introduction ..................................................................................................................... 4-3
Covers
REP 1.1 Left Side Cover................................................................................................. 4-5
REP 1.2 Right Side Cover............................................................................................... 4-5
REP 1.3 Top Cover Assembly ........................................................................................ 4-6
REP 1.4 Front Cover....................................................................................................... 4-7
REP 1.5 Lower Left Cover .............................................................................................. 4-7
REP 1.6 HVPS Cover ..................................................................................................... 4-8
REP 1.7 Lower Rear Cover............................................................................................. 4-8
REP 1.8 MBF Gear Cover............................................................................................... 4-9
REP 1.9 Rear Cover ....................................................................................................... 4-9
Paper Feed
REP 2.1 MBF Assembly.................................................................................................. 4-11
REP 2.2 MBF Feed Roll.................................................................................................. 4-12
REP 2.3 Tray 1 Turn Roll Clutch Assembly .................................................................... 4-12
REP 2.4 Tray 1 Turn Roll Assembly ............................................................................... 4-13
REP 2.5 MBF Retard Holder Assembly.......................................................................... 4-13
REP 2.6 Tray 1 No Paper Sensor Assembly .................................................................. 4-14
REP 2.7 MBF No Paper Sensor Assembly..................................................................... 4-15
REP 2.8 MBF Feed Solenoid.......................................................................................... 4-16
REP 2.9 Tray 1 Feed Solenoid ....................................................................................... 4-16
REP 2.10 Tray 1 Feed Roll ............................................................................................. 4-17
REP 2.11 Tray 1 Retard Holder Assembly...................................................................... 4-17
Paper Transportation
REP 3.1 Retard Chute Assembly.................................................................................... 4-19
REP 3.2 Rear Chute Assembly....................................................................................... 4-19
REP 3.3 Lower Turn Roll Assembly................................................................................ 4-20
REP 3.4 Tray 1 Low Paper Sensor................................................................................. 4-20
REP 3.5 Tray 1 Right Guide Assembly........................................................................... 4-21
REP 3.6 Tray 1 Left Guide Assembly ............................................................................. 4-22
REP 3.7 MBF Assembly Position.................................................................................... 4-23
Registration
REP 4.1 Paper Transport Assembly............................................................................... 4-25
REP 4.2 Registration Actuator........................................................................................ 4-26
REP 4.3 Registration Clutch ........................................................................................... 4-27
REP 4.4 Metal Registration Roll...................................................................................... 4-27
REP 4.5 Rubber Registration Roll................................................................................... 4-28
REP 4.6 Registration Sensor.......................................................................................... 4-28
Exit Assembly and Fuser
REP 5.1 Fuser Assembly................................................................................................ 4-29
REP 5.2 Stack Full Sensor.............................................................................................. 4-29
REP 5.3 Stack Full Actuator............................................................................................ 4-30
REP 5.4 Exit Gate Chute ................................................................................................ 4-31
REP 5.5 Exit Roll Assembly............................................................................................ 4-32
Drive Assembly
REP 6.1 Main Gear Drive Assembly............................................................................... 4-35
REP 6.2 Main Motor Assembly ....................................................................................... 4-36
Xerographics
REP 7.1 Laser Assembly ................................................................................................ 4-37
REP 7.2 Right Print Cartridge Guide Assembly.............................................................. 4-38
REP 7.3 Toner Sensor Assembly.................................................................................... 4-39
REP 7.4 Print Cartridge Sensor Assembly...................................................................... 4-39
REP 7.5 Top Cover Interlock Switch............................................................................... 4-40
REP 7.6 Left Print Cartridge Guide Assembly................................................................. 4-41
REP 7.7 BTR Assembly.................................................................................................. 4-41
Electronics
REP 8.1 System Controller PWB.................................................................................... 4-43
REP 8.2 HVPS PWB....................................................................................................... 4-44
REP 8.3 Duplex Interface PWB....................................................................................... 4-45
REP 8.4 Main Fan........................................................................................................... 4-45
REP 8.5 Print Engine Controller PWB............................................................................. 4-46
REP 8.6 LVPS Assembly................................................................................................ 4-47
REP 8.7 LVPS FAN......................................................................................................... 4-47
REP 8.8 AC Input Assembly........................................................................................... 4-48
REP 8.9 Control Panel +5 VDC Power Supply ............................................................... 4-48
Duplex Assembly
REP 9.1 Duplex Assembly.............................................................................................. 4-51
REP 9.2 Exit Motor Assembly......................................................................................... 4-51
REP 9.3 Drive Belt.......................................................................................................... 4-52
REP 9.4 Upper Roll Assembly ........................................................................................ 4-52
REP 9.5 Lower Roll Assembly ........................................................................................ 4-53
REP 9.6 Sensor Assembly.............................................................................................. 4-53
REP 9.7 Duplex PWB...................................................................................................... 4-54
REP 9.8 Drive Motor Assembly....................................................................................... 4-54
Offsetting Catch Tray (OCT)
REP 10.1 Offset Catch Tray (OCT)................................................................................. 4-55
REP 10.2 Top Cover....................................................................................................... 4-55
REP 10.3 Rear Cover Assembly..................................................................................... 4-56
REP 10.4 Front Cover..................................................................................................... 4-56
REP 10.5 Exit Gate Solenoid.......................................................................................... 4-57
REP 10.6 Eliminator Assembly ....................................................................................... 4-57
REP 10.7 Stack Full Sensor............................................................................................ 4-58
REP 10.8 Stack Full Sensor Actuator ............................................................................. 4-58
REP 10.9 Offset Motor Assembly.................................................................................... 4-59
REP 10.10 Drive Motor Assembly................................................................................... 4-59
REP 10.11 Offset Assembly............................................................................................ 4-60
REP 10.12 Offset Roller.................................................................................................. 4-61
REP 10.13 Rear Cover Interlock Switch ......................................................................... 4-61
REP 10.14 OCT PWB..................................................................................................... 4-62
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02/2000
4-2 Print N2025/N2825
Initial Issue
Repair-Adjustment
REP 10.15 Paper Sensor................................................................................................ 4-62
500 Sheet Feeder
REP 11.1 Printer Removal.............................................................................................. 4-63
REP 11.2 Front Cover..................................................................................................... 4-63
REP 11.3 Left Cover....................................................................................................... 4-64
REP 11.4 Right Cover..................................................................................................... 4-64
REP 11.5 Rear Cover ..................................................................................................... 4-65
REP 11.6 Drive Assembly............................................................................................... 4-65
REP 11.7 Drive Motor..................................................................................................... 4-66
REP 11.8 Feeder PWB................................................................................................... 4-66
REP 11.9 Feed Head Assembly ..................................................................................... 4-67
REP 11.10 Feed Rolls..................................................................................................... 4-68
REP 11.11 Feed Solenoid............................................................................................... 4-68
REP 11.12 Turn Roll Assembly....................................................................................... 4-69
REP 11.13 Retard Chute Assembly................................................................................ 4-69
REP 11.14 Left Tray Guide............................................................................................. 4-70
REP 11.15 Right Tray Guide........................................................................................... 4-71
REP 11.16 Retard Holder Assembly............................................................................... 4-72
REP 11.17 Retard Turn Roll Assembly........................................................................... 4-72
REP 11.18 Paper Size Sensor........................................................................................ 4-73
REP 11.19 Paper Tray Sensor........................................................................................ 4-73
REP 11.20 No Paper Sensor.......................................................................................... 4-74
REP 11.21 No Paper Actuator........................................................................................ 4-75
REP 11.22 Preregistration Sensor.................................................................................. 4-75
2000 Sheet Feeder
REP 12.1 Removing Printer from 2000 Sheet Feeder.................................................... 4-77
REP 12.2 Left Side Cover............................................................................................... 4-78
REP 12.3 Upper Rear Cover........................................................................................... 4-78
REP 12.4 Lower Rear Cover........................................................................................... 4-79
REP 12.5 Right Side Cover............................................................................................. 4-79
REP 12.6 Front Cover..................................................................................................... 4-80
REP 12.7 Tray Assembly................................................................................................ 4-80
REP 12.8 Left Foot.......................................................................................................... 4-81
REP 12.9 Right Foot....................................................................................................... 4-81
REP 12.10 2000 Sheet Feeder PWB.............................................................................. 4-82
REP 12.11 Tray Lift Motor Assembly.............................................................................. 4-82
REP 12.12 A4 Paper Size Sensor .................................................................................. 4-83
REP 12.13 Casters ......................................................................................................... 4-83
REP 12.14 Harness Assembly........................................................................................ 4-84
REP 12.15 Drive Assembly............................................................................................. 4-84
REP 12.16 Feed, Nudger, and Retard Roll..................................................................... 4-85
REP 12.17 Paper Height Sensor .................................................................................... 4-85
REP 12.18 Paper Feed Motor Assembly........................................................................ 4-86
REP 12.19 Link Stopper.................................................................................................. 4-86
REP 12.20 No Paper Sensor.......................................................................................... 4-87
REP 12.21 No Paper Sensor Actuator............................................................................ 4-87
REP 12.22 Left and Right Side Guides........................................................................... 4-88
REP 12.23 Left and Right Wire Cover ............................................................................ 4-89
REP 12.24 Shaft Cover Assembly.................................................................................. 4-90
REP 12.25 Drive Shaft Assembly ................................................................................... 4-90
REP 12.26 Brake Assembly............................................................................................ 4-91
REP 12.27 Left Tray Wires.............................................................................................. 4-91
REP 12.28 Right Tray Wires........................................................................................... 4-92
REP 12.29 Retard Assembly........................................................................................... 4-92
Adjustments
ADJ 1.1 Registration ....................................................................................................... 4-95
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02/2000
4-3
DocuPrint N2025/N2825
Repair-Adjustment
Initial Issue
Introduction
Overview
The Repair / Adjustment section, Section 4 of the Service Manual, provides information that
enables the Service Representative to restore the product to within specification after fault iso-
lation.
Section Contents
The Section Contents lists, in sequence, all the items of the section, with page references.
Each entry in the section contents appears exactly as it appears in the manual.
Repair Procedures
This repair subsection contains instructions for removal and replacement tasks. A removal and/
or replacement task is included when it is not obvious how components are removed and
replaced, or when special conditions (such as an adjustment) must be met during these tasks.
Step-by-step removal procedures for a specific component or assembly are provided. Numbers
in the illustrations refer to steps in the procedure. For example: if step 3 in a procedure
instructed you to remove a screw, the screw in the illustration would be labeled 3.
Illustrations are used to assist you with the procedures. You should refer to the specific Parts
List illustration (listed under the repair title) for locating most components within a procedure.
NOTE: Always reinstall the correct type and size screws. Using the wrong screw can damage
tapped holes.
NOTE: Do not use excessive force to either remove or install a part.
Locations, such as left, right, front, or rear, given in the repairs assume you are facing the
printer Control Panel.
Adjustment
The N2025/2825 printer does not contain any field adjustable components.
WARNING
Use of controls or adjustments other than those specified in this manual may result in
an exposure to dangerous laser light.
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02/2000
5-1
DocuPrint N2025/N2825
Parts-list
Initial Issue
5 Parts-list
Introduction ..................................................................................................................... 5-3
Covers
PL 1.1 Covers ................................................................................................................. 5-4
Paper Trays
PL 2.1 Paper Tray (A3/Ledger)....................................................................................... 5-5
PL 2.2 Paper Tray (A4/Letter)......................................................................................... 5-6
Paper Feeder
PL 3.1 Paper Feeder....................................................................................................... 5-7
MBF Assembly
PL 4.1 MBF Assembly..................................................................................................... 5-8
PL 4.2 Paper Handler...................................................................................................... 5-9
Paper Transport
PL 5.1 Paper Transport................................................................................................... 5-10
Exit Assembly Fuser
PL 6.1 Rear Cover Assembly.......................................................................................... 5-11
PL 6.2 Fuser.................................................................................................................... 5-12
Frame Drives
PL 7.1 Frame & Drives.................................................................................................... 5-13
Xerographics
PL 8.1 Xerographics........................................................................................................ 5-14
Electrical
PL 9.1 Electrical.............................................................................................................. 5-15
PL 9.2 Electrical.............................................................................................................. 5-16
Offsetting Catch Tray
PL 10.1 Offsetting Catch Tray (1 of 2)............................................................................ 5-17
PL 10.2 Offsetting Catch Tray (2 of 2)............................................................................ 5-18
Optional Feeder 1
PL 11.1 500 Sheet Feeder (1 of 3).................................................................................. 5-19
PL 11.2 500 Sheet Feeder (2 of 3).................................................................................. 5-20
PL 11.3 500 Sheet Feeder (3 of 3).................................................................................. 5-21
High Capacity Feeder
PL 12.1 2000 Sheet Feeder (1 of 4)................................................................................ 5-22
PL 12.2 2000 Sheet Feeder (2 of 4)................................................................................ 5-23
PL 12.3 2000 Sheet Feeder (3 of 4)................................................................................ 5-24
PL 12.4 2000 Sheet Feeder (4 of 4)................................................................................ 5-25
Duplex
PL 13.1 Duplex................................................................................................................ 5-26
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