Xerox DocuPrint N2125 User manual

XEROX
Xerox DocuPrint N2125
Network Laser Printer Service Manual
721P52390
February 2000 This Service Manual contains information
that applies to the DocuPrint N2125 Laser
Printer.
CAUTION
These components are susceptible
to electrostatic discharge. Observe
all ESD procedures to avoid
damage.

Table of Contents 02/2000
iv
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 N2125 Service Manual is the primary document used for
repairing and maintaining the DocuPrint N2125 Laser Printer.
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 N2125 failures.

DocuPrint N2125 02/2000
viii
Page Revision Page Revision Page Revision Page Revision Page Revision Page Revision
Initial Issue
Product:
DocuPrint N2125 Laser Printer
Title:
Xerox DocuPrint N2125 Network Laser
Printer Service Manual
Part Number:
721P52390
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Revision Control List DocuPrint N
02/2000
ix
Initial Issue
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02/2000
4-1
DocuPrint N2125
Repair-Adjustment
Initial Issue
4 Repair-Adjustment
Introduction...................................................................................................................... 4-3
Covers and Trays
REP 1.1 Left Interface Cover Assembly.......................................................................... 4-5
REP 1.2 Left Cover......................................................................................................... 4-5
REP 1.3 Option Cover..................................................................................................... 4-6
REP 1.4 Top Cover Assembly......................................................................................... 4-6
REP 1.5 Right Cover....................................................................................................... 4-7
REP 1.6 Front Cover Assembly ...................................................................................... 4-8
REP 1.7 Left Front Cover................................................................................................ 4-8
REP 1.8 Rear Cover Assembly....................................................................................... 4-9
REP 1.9 Rear Face Up Cover Assembly........................................................................ 4-10
REP 1.10 Interlock Cover................................................................................................ 4-10
REP 1.11 Left Plate Assembly........................................................................................ 4-11
REP 1.12 Plate Handle ................................................................................................... 4-11
Tray 1
REP 2.1 Retard Roll Assembly ....................................................................................... 4-13
REP 2.2 Friction Clutch Assembly .................................................................................. 4-14
REP 2.3 Retard Spring.................................................................................................... 4-15
REP 2.4 Motor Assembly................................................................................................ 4-16
REP 2.5 Connector and Socket Guide............................................................................ 4-17
Paper Feed (Tray 1)
REP 3.1 Paper Feeder.................................................................................................... 4-19
REP 3.2 Turn Roll Assembly........................................................................................... 4-19
REP 3.3 Tray 1 No Paper Actuator................................................................................. 4-20
REP 3.4 Stack Height Sensor......................................................................................... 4-21
REP 3.5 Low Paper Sensor ............................................................................................ 4-21
REP 3.6 Feed Clutch Assembly...................................................................................... 4-22
REP 3.7 Feeder Assembly.............................................................................................. 4-23
REP 3.8 Paper Feed Rolls.............................................................................................. 4-24
REP 3.9 Feeder PWB ..................................................................................................... 4-24
REP 3.10 Feeder Socket................................................................................................. 4-25
REP 3.11 Size Sensor Housing ...................................................................................... 4-26
REP 3.12 Size Sensor Actuators .................................................................................... 4-27
REP 3.13 Tray 1 Size PWB............................................................................................. 4-28
REP 3.14 Size Harness Assembly.................................................................................. 4-28
Paper Feed (MBF)
REP 4.1 MBF Chute Assembly....................................................................................... 4-29
REP 4.2 MBF Feed Roll Assembly ................................................................................. 4-29
REP 4.3 MBF Feed Roll.................................................................................................. 4-30
REP 4.4 Tray Bottom Assembly...................................................................................... 4-31
REP 4.5 MBF No Paper Actuator.................................................................................... 4-32
REP 4.6 Tray Pick Up ..................................................................................................... 4-32
REP 4.7 Retard Pad Assembly....................................................................................... 4-33
REP 4.8 MBF No Paper Sensor...................................................................................... 4-33
REP 4.9 Pick Up Solenoid............................................................................................... 4-34
REP 4.10 Envelope Connector Assembly....................................................................... 4-35
Paper Transportation
REP 5.1 Paper Handler Assembly.................................................................................. 4-37
REP 5.2 Toner Sensor.................................................................................................... 4-38
REP 5.3 Registration Actuator ........................................................................................ 4-39
REP 5.4 Registration Sensor .......................................................................................... 4-40
REP 5.5 Registration Clutch............................................................................................ 4-40
REP 5.6 Rubber Registration Roll................................................................................... 4-41
Exit Assembly and Fuser
REP 6.1 Transport Chute Assembly ............................................................................... 4-43
REP 6.2 Fuser Assembly................................................................................................ 4-43
REP 6.3 Fuser Harness Assembly.................................................................................. 4-44
REP 6.4 Exit Chute Assembly......................................................................................... 4-45
REP 6.5 Exit Motor Assembly......................................................................................... 4-46
REP 6.6 Stack Full Sensor.............................................................................................. 4-46
REP 6.7 Mid 1 & Mid 2 Roll Assemblies ......................................................................... 4-47
REP 6.8 Stack Full Actuator............................................................................................ 4-49
REP 6.9 Fuser Upper Cover Assembly/ Heat Rod.......................................................... 4-50
Xerographics
REP 7.1 BTR Assembly.................................................................................................. 4-51
REP 7.2 Print Cartridge Top Guide Assembly ................................................................ 4-51
REP 7.3 Print Cartridge Sensor Assembly...................................................................... 4-52
REP 7.4 Laser Assembly ................................................................................................ 4-53
REP 7.5 Print Cartridge Side Guide................................................................................ 4-53
Main Drive
REP 8.1 Main Motor Assembly ....................................................................................... 4-55
REP 8.2 Main Drive Gear Assembly............................................................................... 4-55
Electrical
REP 9.1 Fan Assembly................................................................................................... 4-57
REP 9.2 System Controller PWB.................................................................................... 4-57
REP 9.3 Print Engine Controller PWB............................................................................. 4-58
REP 9.4 5VDC PWB....................................................................................................... 4-59
REP 9.5 LVPS PWB........................................................................................................ 4-60
REP 9.6 HVPS PWB....................................................................................................... 4-60
REP 9.7 Connector PWB ................................................................................................ 4-61
REP 9.8 Main Switch....................................................................................................... 4-62
REP 9.9 Front Interlock Switch Assembly....................................................................... 4-63
REP 9.10 Rear Interlock Switch Assembly ..................................................................... 4-63
REP 9.11 Offset Catch Tray Harness Assembly............................................................. 4-64
REP 9.12 Duplex Harness Assembly.............................................................................. 4-64
Offsetting Catch Tray (OCT)
REP 10.1 Offset Catch Tray (OCT)................................................................................. 4-67
REP 10.2 Exit Tray Extension......................................................................................... 4-67
REP 10.3 Exit Tray.......................................................................................................... 4-68

02/2000
4-2 ocuPrint N2125
Initial Issue
Repair-Adjustment
REP 10.4 Rear Cover Assembly...........................................
REP 10.5 Lower Cover .........................................................
REP 10.6 Inner Exit Chute Assembly ............................................................................. 4-70
REP 10.7 Offset Catch Tray PWB .................................................................................. 4-70
REP 10.8 Motor Drive Assembly..................................................................................... 4-71
REP 10.9 Static Eliminator.............................................................................................. 4-71
REP 10.10 Direction Solenoid......................................................................................... 4-72
REP 10.11 Exit Sensor Assembly................................................................................... 4-72
REP 10.12 Stack Full Sensor Actuator........................................................................... 4-73
REP 10.13 Stack Full Sensor.......................................................................................... 4-73
REP 10.14 Offset Roll Assembly .................................................................................... 4-74
REP 10.15 Mid Roll Assembly........................................................................................ 4-75
REP 10.16 Offset Assembly............................................................................................ 4-76
REP 10.17 Offset Motor Assembly ................................................................................. 4-76
REP 10.18 Offset Assembly Home Sensor..................................................................... 4-77
Optional Paper Feeder
REP 11.1 Printer Removal.............................................................................................. 4-79
REP 11.2 550 Sheet Feeder Right Cover....................................................................... 4-79
REP 11.3 550 Sheet Feeder Left Cover ......................................................................... 4-80
REP 11.4 550 Sheet Feeder Gear Bracket Assembly .................................................... 4-80
REP 11.5 Top Plate ........................................................................................................ 4-81
REP 11.6 550 Sheet Feeder Drive Assembly................................................................. 4-81
REP 11.7 No Paper Actuator.......................................................................................... 4-82
REP 11.8 Turn Roll Assembly......................................................................................... 4-82
REP 11.9 Feeder PWB................................................................................................... 4-83
REP 11.10 Feed Clutch Assembly.................................................................................. 4-84
REP 11.11 Paper Feed Rolls.......................................................................................... 4-85
REP 11.12 Feeder Assembly.......................................................................................... 4-86
REP 11.13 Stack Height Sensor..................................................................................... 4-87
REP 11.14 Low Paper Sensor........................................................................................ 4-87
REP 11.15 Feeder Socket .............................................................................................. 4-88
REP 11.16 550 Sheet Feeder Size Harness Assembly.................................................. 4-88
REP 11.17 Size Sensor Housing Assembly.................................................................... 4-89
REP 11.18 Size Sensor Actuators.................................................................................. 4-90
REP 11.19 Size PWB...................................................................................................... 4-91
REP 11.20 Size Harness Assembly................................................................................ 4-91
Duplex Unit
REP 12.1 Duplex Assembly............................................................................................ 4-93
REP 12.2 Turn Chute Assembly..................................................................................... 4-93
REP 12.3 Duplex Cover.................................................................................................. 4-94
REP 12.4 Duplex PWB ................................................................................................... 4-94
REP 12.5 Drive Cover..................................................................................................... 4-95
REP 12.6 Connector Chute Assembly............................................................................ 4-95
REP 12.7 Upper Chute Assembly................................................................................... 4-96
REP 12.8 Motor Assembly.............................................................................................. 4-97
REP 12.9 Rear Roll Assembly........................................................................................ 4-97
REP 12.10 Middle Roll Assembly ................................................................................... 4-98
REP 12.11 Front Roll Assembly...................................................................................... 4-99
REP 12.12 Synchronous Belt.......................................................................................... 4-100
REP 12.13 Transport Sensor.......................................................................................... 4-101
nsor.................................................................................... 4-101
Envelope Feeder
REP 13.1 Bottom Cover.................................................................................................. 4-103
REP 13.2 Top Chute....................................................................................................... 4-103
REP 13.3 Envelope Feeder PWB................................................................................... 4-104
REP 13.4 Retard Roll Assembly ..................................................................................... 4-104
REP 13.5 Exit Pinch Roll................................................................................................. 4-105
REP 13.6 Exit Sensor Assembly..................................................................................... 4-105
REP 13.7 Weight Arm..................................................................................................... 4-106
REP 13.8 Tray Extension................................................................................................ 4-106
REP 13.9 No Paper Actuator.......................................................................................... 4-107
REP 13.10 No Paper Sensor.......................................................................................... 4-107
REP 13.11 Gear Cover ................................................................................................... 4-108
REP 13.12 Feed Clutch .................................................................................................. 4-108
REP 13.13 Transport Roll Assembly............................................................................... 4-109
REP 13.14 Bottom Roll Assembly................................................................................... 4-110
REP 13.15 Feed Roll Assembly 1................................................................................... 4-111
REP 13.16 Feed Roll Assembly 2................................................................................... 4-112
REP 13.17 Feed Belts..................................................................................................... 4-113
Adjustments
ADJ 1.1 Registration ....................................................................................................... 4-115

02/2000
4-3
DocuPrint N2125 Introduction
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.
The Print Cartridge should be removed and stored in a safe place when performing any proce-
dure where screws or components may damage the cartridge.
Adjustment
Other than side-to-side and lead edge to trail edge registration, the N2125 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.

02/2000
5-1
DocuPrint N2125
Parts-list
Initial Issue
5 Parts-list
Introduction...................................................................................................................... 5-3
Covers (1 of 3)
PL 1.1 Covers (1 of 3)..................................................................................................... 5-4
Covers (2 of 3)
L 1.2 Covers (2 of 3)..................................................................................................... 5-5
Covers (3 of 3)
L 1.3 Covers (3 of 3) Options........................................................................................ 5-6
aper Cassette 1
L 2.1 Tray 1 (1 of 2) ...................................................................................................... 5-7
aper Cassette 2
L 2.2 Tray 1 (2 of 2) ...................................................................................................... 5-8
aper Feeder
L 3.1 Paper Feeder....................................................................................................... 5-9
MBF Chute
L 4.1 MBF Chute........................................................................................................... 5-10
aper Transport
L 5.1 Paper Handler Assembly..................................................................................... 5-11
Chute Transport & Fuser
L 6.1 Chute Transport & Fuser ..................................................................................... 5-12
xit
L 7.1 Exit....................................................................................................................... 5-13
Drive & Xerographics
PL 8.1 Drive & Xerographics........................................................................................... 5-14
Frame & Size Sensor
PL 9.1 Frame & Size Sensor........................................................................................... 5-15
Electrical
PL 10.1 Electrical ............................................................................................................ 5-16
Optional Feeder 1
PL 11.1 500 Sheet Feeder (1 of 2).................................................................................. 5-17
Optional Feeder 2
PL 11.2 500 Sheet Feeder (2 of 2).................................................................................. 5-18
Envelope Feeder 1
PL 12.1 Envelope Feeder (1 of 2)................................................................................... 5-19
Envelope Feeder 2
PL 12.2 Envelope Feeder (2 of 2)................................................................................... 5-20
Duplex 1
PL 13.1 Duplex (1 of 2)................................................................................................... 5-21
Duplex 2
PL 13.2 Duplex (2 of 2)................................................................................................... 5-22
Offset Catch Tray 1
PL 14.1 Offset Catch Tray (1 of 2) .................................................................................. 5-23
Offset Catch Tray 2
PL 14.2 Offset Catch Tray (2 of 2) .................................................................................. 5-24

XEROX Docuprint N2125 service manual
XEROX Docuprint N2125 service manual
XEROX Docuprint N2125 service manual
XEROX Docuprint N2125 service manual
XEROX Docuprint N2125 service manual
XEROX Docuprint N2125 service manual
XEROX Docuprint N2125 service manual
XEROX Docuprint N2125 service manual
XEROX Docuprint N2125 service manual