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.

DocuPrint N2125
Copyright 02/2000
ii
Initial Issue
Copyright
This Service Manual contains information that applies to the DocuPrint
N2125 Electronic Laser Printer.
NOTICE
This manual is for use by Xerox Technicians and Xerox trained
technicians only.
NOTICE
While every care has been taken in the preparation of this manual, no
liability will be accepted by Xerox arising out of any inaccuracies or
omissions.
All service documentation is supplied to Xerox external customers for
informational purposes only. Xerox service documentation is intended
for use by certified, product trained service personnel only. Xerox does
not warrant or represent that such documentation is complete. Nor does
Xerox represent or warrant that it will notify or provide to such customer
any future changes to this documentation. Customer’s service of
equipment, or modules, components, or parts of such equipment may
void any otherwise applicable Xerox warranties. If Customer services
such equipment, modules, components, or parts thereof, Customer
releases Xerox from any and all liability for Customer’s actions, and
Customer agrees to indemnify, defend, and hold Xerox harmless from
any third party claims which arise directly or indirectly from such
service.
Prepared by:
Maak 1
105 Loudoun Street S.W.
Leesburg, VA. 20175-2910
Prepared for:
Network Printers Business Unit
Customer and Marketing Focus
701 South Aviation Blvd.
El Segundo, California 90245
Copyright 2000 by Xerox Corporation. Xerox and DocuPrint N2125 are
registered trademarks of Xerox Corporation.
Copyright 2000 Xerox Corporation. All rights reserved.
Copyright protection claimed includes all forms of matters of
copyrightable materials and information now allowed by statutory or
judicial law or hereinafter granted, including without limitation, material
generated from the software programs which are displayed on the
screen such as styles, templates, icons, screen displays, looks, etc.
Xerox, and all product names and product numbers mentioned in this
publication are trademarks.
Adobe and PostScript are trademarks of Adobe Systems Incorporated.
PCL, HP LaserJet, and Intellifont are trademarks of Hewlett-Packard
Company. IBM is a trademark of International Business Machines
Corporation. Microsoft, Microsoft Windows, Microsoft Word, MS, and
MS-DOS are trademarks of Microsoft Corporation. Univers is a
trademark of Linotype AG or its subsidiaries. WordPerfect is a
trademark of WordPerfect Corporation. Centronics is a trademark of
Centronics Corporation. Macintosh and TrueType are trademarks of
Apple Computer, Incorporated. All other product names are trademarks/
tradenames of their respective owners.
PCL, PCL 5e, and PCL 6 are trademarks of Hewlett Packard Company.
This printer contains an emulation of the Hewlett Packard PCL 5e or
PCL 6 command language, recognizes HP PCL 5e or HP PCL 6
commands, and processes these commands in a manner compatible
with Hewlett Packard LaserJet printer products.
XL is a trademark of Xiontics.
Warning
This equipment complies with the requirements in Part 15 of
FCC rules for a class A computing device. Operation of the
equipment in a residential area may cause unacceptable
interference to radio and TV reception, requiring the
operator to take whatever steps are necessary to correct the
interference.

Electrostatic Discharge
DocuPrint N2125 02/2000
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Electrostatic Discharge
This caution indicates that there are components which are
sensitive to damage caused by electrostatic discharge.
Shock Hazard
This symbol indicates the presence of potentially hazardous
voltages.
Fuser Hazard
This symbol indicates the presence of extreme heat from the
Fuser Assembly.
Class 1 LASER Product
The DocuPrint N2125 laser printer is certified to comply with
Laser Product Performance Standards set by the U.S.
Department of Health and Human Services as a Class 1 Laser
Product. This means that this is a class of laser product that does
not emit hazardous laser radiation; this is possible only because
the laser beam is totally enclosed during all modes of customer
operation.
The laser and output of the laser scanner unit produces a beam
that, if looked into, could cause eye damage. Service procedures
must be followed exactly as written without change.
When servicing the machine or laser module, follow the
procedures specified in the manual and there will be no hazards
from the laser.
Laser (FDA): Any laser label visible to service must be
reproduced in the service manual with location shown or
indicated. Safe working procedures and clear warnings
concerning precautions to avoid possible exposure must also be
included.
The Laser contained in the DocuPrint N2125 meets the following
standard: Laser class 3B, maximum 5mW, wavelength 780nm.
The following LASER symbol will be displayed at the start of any
procedure where possible exposure to the laser beam exists.
LUOKAN 1 LASERLAITE
KLASS 1 LASER APPARAT
CAUTION
These components are susceptible
to electrostatic discharge. Observe
all ESD procedures to avoid
damage.
FM_001

DocuPrint N2125
Table of Contents 02/2000
iv
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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.

Organization
DocuPrint N2125 02/2000
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Organization
This manual is divided into seven sections. The title and description of
each section of the manual is as follows:
Section 1 - Service Call Procedures
This section is used to identify a suspected problem. It contains
Machine Orientation, Call Flow, Initial Actions, Corrective Actions, and
Final Actions. This part of the service manual should always be used to
start the service call.
Section 2 - Repair Analysis Procedures
This section is used to isolate and identify problems to a faulty
component or subassembly. It contains the introduction, display
message table, error code tables and the Repair Analysis Procedures
(RAPs).
Section 3 - Image Quality
This section contains image quality repair procedures to assist in
correcting image quality defects. These procedures provide defect
samples and definitions to help identify the type of defect that exists,
the test pattern to use, and actions required to correct the defects.
Section 4 - Repair / Adjustment
This section contains the instructions for removal, replacement, and
adjustment of the spared parts within the machine.
Section 5 - Parts Lists
This section contains illustrations of disassembled subsystems and a
listing of the spared parts.
Part names are listed in this section of the manual even if the part itself
is not spared. All the parts that are spared will have the part number
listed. Parts that are not spared will not have a number listed.
Section 6 - General Procedures
This section includes the Operations Menu Map and the Service Mode
Menu Map. It includes all unique service operations, supplemental tools
and supplies.
Section 7 - Wiring Data
This section contains sensor, connector, and PWB location drawings;
power distribution diagrams, interconect diagrams, interconnect
diagrams and pin assignment information. This information is not
specific to individual procedures but is provided for general reference.

DocuPrint N2125
Terminology and Symbols 02/2000
vi
Initial Issue
Terminology and Symbols
The following is the terminology and symbols that are used in this
manual for Warnings, Electrostatic Device or General Cautions, and
Notes.
Warning
This equipment complies with the requirements in Part 15 of FCC rules
for a class A computing device. Operation of the equipment in a
residential area may cause unacceptable interference to radio and TV
reception, requiring the operator to take whatever steps are necessary
to correct the interference.
Electrostatic Discharge
The following symbols indicates that there are components which are
sensitive to damage caused by electrostatic discharge.
Shock Hazard
This symbol indicates the presence of potentially hazardous voltages.
Fuser Hazard
This symbol indicates the presence of extreme heat from the Fuser
Assembly.
FM_001

Laser Product Certification
DocuPrint N2125 02/2000
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Laser Product Certification
CAUTION
Use of controls or adjustments other than those specified in this manual
may result in an exposure to dangerous laser radiation.
The DocuPrint N2125 is certified to comply with Laser Product
Performance Standards set by the United States Department of Health
and Human Services as a Class 1 product. This means that it is a laser
product that does not emit dangerous laser radiation during any mode
of customer operation.
During servicing, the laser beam could cause eye damage if looked at
directly. Service procedures must be followed exactly as written without
change.
CAUTION
These components are susceptible
to electrostatic discharge. Observe
all ESD procedures to avoid
damage.

Revision Control List
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Initial Issue
Product:
DocuPrint N2125 Laser Printer
Title:
Xerox DocuPrint N2125 Network Laser
Printer Service Manual
Part Number:
721P52390
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DocuPrint N2125 Revision Control List
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Page Revision Page Revision Page Revision Page Revision Page Revision Page Revision
Initial Issue

02/2000
1-1
DocuPrint N2125
Service Call Procedures
Initial Issue
1 Service Call Procedures
1.0 Introduction................................................................................................................1-3
1.1 Machine Orientation.................................................................................................. 1-3
1.2 Call Flow.................................................................................................................... 1-4
1.3 Initial Actions.............................................................................................................1-5
1.4 Corrective Actions..................................................................................................... 1-5
1.5 Final Actions.............................................................................................................. 1-7

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1-2 DocuPrint N2125
Initial Issue
Service Call Procedures

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1-3
DocuPrint N2125 1.0, 1.1
Service Call Procedures
Initial Issue
1.0 Introduction
The Service Call Procedures section is used to identify a suspected problem. This section con-
tains Call Flow, Initial Actions, Corrective Actions, and Final Actions.
Call Flow illustrates the normal activities and flow of a service call.
Initial Actions are used to gather information regarding the performance of the machine and
prepare the product for servicing.
Corrective Actions are used to verify the normal operation of the machine. In the Y/N (Yes/No)
steps of the corrective actions, a Yes response will lead you to the next step. A No response will
indicate the next step to perform or will direct you to a Repair Analysis Procedure (RAP).
RAPs will provide the instructions to isolate the faulty part or provide a list of suspect parts,
when isolation is not appropriate. Wire harnesses are not included in the repair actions and
problems with loose connections or damaged harnesses should be isolated using visual
inspection and the wiring data in section 7.
Final Actions are used to evaluate the total operation of the system and to identify the actions
required to complete the service call.
1.1 Machine Orientation
For servicing the DocuPrint N2125, all references to machine orientation are as illustrated in
Figure 1.
Figure 1 Machine Orientation

02/2000
1-4 DocuPrint N2125
1.2 Initial Issue
Service Call Procedures
1.2 Call Flow
The call flow diagram shows the relationship of actions during a typical service call Figure 1.
The functions in Call Flow correspond to service manual sections as follows:
Section 1 - Initial Actions, Corrective Actions, and Final Actions
Section 2 - Status Indicator Repair Analysis Procedures (RAPs)
Section 3 - Image Quality Repair Analysis Procedures (IQ RAPs)
Section 4 - Repair / Adjustment (REPs)
Section 5 - Parts Lists (PLs)
Section 6 - General Procedures
Section 7 - Wiring
All service calls start with Initial Actions and all service calls end with Final Actions.
Figure 1 Call Flow Diagram

02/2000
1-5
DocuPrint N2125 1.3, 1.4
Service Call Procedures
Initial Issue
1.3 Initial Actions
Initial Actions are used to gather information from the operator concerning problems at the
local machine. Make note of symptoms, error messages, error codes or other information con-
cerning the problem that the operator may provide. This information may help identify an inter-
mittent or unusual problem.
Procedure
1. Ensure that the power cord is connected to the wall outlet and to the machine.
2. Check for paper or other objects in the paper path.
3. Remove all paper from the output tray(s).
4. The Rear Cover and Front Cover are closed.
5. The paper is within specification and is loaded correctly in the Paper Tray(s).
6. Ask the operator to describe, or if possible, demonstrate the problem.
7. If the problem is the result of incorrect operator action, refer the operator to the User doc-
umentation.
NOTE: The printer has the capability of displaying error messages while in the online
mode or in the diagnostic mode. The Fault History log will list the last 100 errors that have
occurred. The three codes may be different in format, but you can use any one of the
codes to access the Error Code Tables (Table 1 or Table 2) in section 2. The Error Code
Tables will list the corrective actions or direct you to a RAP.
8. If an error message is displayed refer to the Error Code Tables (Table 1 or Table 2).
9. If possible, print the “Configuration Sheet”. To print the Configuration Sheet, press and
release [1] or [5] until “Print Menu” is displayed. Then press and release [2] or [6] until
“Config Sheet” is displayed. Press Enter [4] to print the sheet. If the sheet is blank, go to
IQ RAP 2.
10. Have the customer determine that the configuration settings are correct.
11. If possible, print the “Fault History”. To print the “Fault History” press and release [1] or [5]
until “Print Menu” is displayed. Then press and release [2] or [6] until “Fault History” is dis-
played. Next, press Enter [4] to print the sheet. The Fault History will list the error codes
and the meter count when the event happened.Use the Fault History to determine the fre-
quency of a problem. Access the Error Code Tables (Table 1 or Table 2) and perform the
corrective action as instructed.
12. If the Fault History can not be printed, the fault history can be displayed on the Control
Panel. To display the “Fault History” press and release [1] or [5] until “Print Menu” is dis-
played. Then press and release [2] or [6] until “Display Faults” is displayed. Next, press
press [3] to display the last fault that occurred. Continue to press and release [3] to display
the error codes in order from the newest to the oldest. Pressing and releasing the [4] key
will display the codes in order from the oldest to the newest. The Display Faults will dis-
play the error code and the meter count when the event happened. An example of the dis-
play “E9-2 #820”, where E9-2 is the error code and #820 is the meter count.
13. Proceed to Corrective Actions.
1.4 Corrective Actions
Procedure
Ensure that the Initial Actions have been completed. Switch the main power off, wait 10 sec-
onds, then switch the main power on. The Fuser Fan runs.
YN
Perform RAP 2. If the DC power is correct, perform RAP 20.
The Main Drive Motor runs for approximately 6 seconds, then stops.
YN
Perform RAP 16.
The Fuser Fan runs.
YN
Perform RAP 20.
In approximately 30 seconds, the LCD Panel will display “Power On” and the Power On Diag-
nostic (POD) software “Version x.xxx”. The display is correct.
YN
Perform RAP 25
The Control Panel will display a number of different screens as the Power On Diagnostics
Completes Figure 1. The printer completes Power On Diagnostics and Ready is dis-
played.
YN
Perform RAP 25.
Press [1] twice to select “Print Menu”, then press and release [2] until “Menu Map” is displayed.
Press Enter [4] to print the “Menu Map”. “Processing Menu Map” is displayed, immediately fol-
lowed by “Processing Tray #”. The display is correct.
YN
Perform RAP 25/RAP 26.
The Main Driver Motor runs.
YN
Perform RAP 29.
Paper is fed from the paper tray and is delivered to the output tray.
YN
Perform RAP as specified by the Error Code / Message listed in Table 1 of section 2.
The print contains readable text.
YN
If the print is black or blank perform IQ RAP 10 or IQ RAP 2.
If the text is garbled, Perform ()RAP A.
The print quality of the Menu Map is acceptable.
YN
Perform Image Quality Checkout.
A

02/2000
1-6 DocuPrint N2125
1.4 Initial Issue
Service Call Procedures
Enter Diagnostics and select “Print Menu”. Scroll to “Test Print”. Feed at least 5 test prints from
all available trays to the Standard output tray (GP 2.5) for test print. Test prints were suc-
cessfully delivered from each tray.
YN
Perform RAP as specified by the Error Code / Message listed in Table 1 of section 2.
If the Duplex Assembly is installed, run at least 5 duplexed prints (GP 2.5) for test print. If a
Duplex Assembly is not installed, follow the “Y” path. The prints were delivered success-
fully.
YN
Perform RAP as specified by the Error Code / Message listed in Table 1 of section 2.
If a Offset Catch Tray (OCT) is installed, run at least 5 prints to the OCT (GP 2.5) for test print.
If an OCT is not installed, follow the “Y” path.Prints were successfully delivered to the
OCT.
YN
Perform RAP as specified by the Error Code / Message listed in Table 1 of section 2.
Ensure that all normal printer conditions are set i.e. paper loaded, machine in Ready condition,
internet cable connected. Have the customer send a document to the printer. The print is
successful.
YN
Try a sending a document from a different application. The print was successful.
YN
There may be a problem with the print drivers. Have the customer contact Xerox
Customer Support.
There may be a problem with the application software. Have the customer contact Xerox
Customer Support.
Go to Final Actions.
Figure 1 Power On Diagnostic Sequence
A

02/2000
1-7
DocuPrint N2125 1.5
Service Call Procedures
Initial Issue
1.5 Final Actions
Procedure
1. Switch the main power off.
2. Update the tag matrix as required.
3. Reinstall all the covers removed during the service call and complete all required adminis-
trative tasks.
4. Clean the covers and ensure all labels are readable.
5. Switch the printer power on. If any of the customer selections were changed return them
to the customer’s preferred settings.
6. Run final prints and verify image quality. For Image Quality problems, go to section 3 -
Image Quality Checkout.
7. Clean the general area.
8. Communicate with the customer to inform them of actions taken and to ensure all prob-
lems have been solved.

02/2000
1-8 DocuPrint N2125
1.5 Initial Issue
Service Call Procedures

02/2000
2-1
DocuPrint N2125
Status Indicator Repair Analysis Procedures
Initial Issue
2 Status Indicator Repair Analysis Procedures
Introduction...................................................................................................................... 2-3
Measurements................................................................................................................. 2-3
Error Code Table
Error Code Tables........................................................................................................... 2-5
Base Printer
RAP 1 AC Power............................................................................................................. 2-11
RAP 2 DC Power............................................................................................................. 2-12
RAP 3 DC Power Loading............................................................................................... 2-13
RAP 4 Tray # Failure Power Off/On (C3)........................................................................ 2-14
RAP 5 Tray # Empty (C5)................................................................................................ 2-15
RAP 6 Remove Output From Std Bin (C5)...................................................................... 2-16
RAP 7 MBF Misfeed (E2)................................................................................................ 2-16
RAP 8 Paper Jam / Misfeed (E2).................................................................................... 2-17
RAP 9 System Controller PWB....................................................................................... 2-18
RAP 10 Paper Jam Open Front Cover (E3).................................................................... 2-18
RAP 11 Paper Jam / Exit (E4)......................................................................................... 2-19
RAP 12 Close Front Cvr/Close Rear Cvr (E5)................................................................ 2-20
RAP 13 Install Print Cartridge (J3).................................................................................. 2-21
RAP 14 Toner Low (J5)................................................................................................... 2-21
RAP 15 P1: Fuser Pause................................................................................................ 2-22
RAP 16 Motor Failure Power Off/On (U1)....................................................................... 2-22
RAP 17 Laser Fail / Power Off/On (U2) .......................................................................... 2-23
RAP 18 Fuser Failure Power Off/On (U4)....................................................................... 2-24
RAP 19 IOT NVM Fail / Power Off/On (U6) .................................................................... 2-24
RAP 20 Fan Failure Power Off Now (U5)........................................................................ 2-25
RAP 21 Low Paper Tray #............................................................................................... 2-25
RAP 22 Paper Size Error ................................................................................................ 2-26
RAP 23 Low Toner Sensor Failure.................................................................................. 2-26
RAP 24 Inoperative Printer.............................................................................................. 2-27
RAP 25 Malfunctioning LCD/LED.................................................................................... 2-28
RAP 26 Inoperative Keypad............................................................................................ 2-29
RAP 27 Erratic Printer Operation.................................................................................... 2-29
RAP 28 Power Supply..................................................................................................... 2-30
RAP 29 Main Motor Assembly ........................................................................................ 2-31
RAP 30 Laser Assembly................................................................................................. 2-32
RAP 31 Fuser Assembly................................................................................................. 2-32
RAP 32 Registration Sensor........................................................................................... 2-33
RAP 33 MBF No Paper Sensor....................................................................................... 2-34
RAP 34 Tray 1 No Paper Sensor.................................................................................... 2-34
RAP 35 Standard Bin Stack Full Sensor......................................................................... 2-35
RAP 36 Print Cartridge Sensor Assembly....................................................................... 2-35
RAP 37 Tray Motor Assembly Checkout Procedure....................................................... 2-36
RAP 38 Registration Clutch............................................................................................. 2-36
RAP 39 Turn Roll Clutch Assembly................................................................................. 2-37
RAP 40 Tray 1 Feed Clutch............................................................................................ 2-37
RAP 41 MBF Feed Solenoid........................................................................................... 2-38
RAP 42 System Controller Isolation................................................................................ 2-38
RAP 43 HVPS Assembly................................................................................................. 2-39
RAP 44 Electrical Noise.................................................................................................. 2-39
RAP 45 DIMM 1 (0101)................................................................................................... 2-40
RAP 46 DIMM 2 (0102)................................................................................................... 2-41
RAP 47 DIMM 3 (0103)................................................................................................... 2-41
RAP 48 Exit Sensor......................................................................................................... 2-42
RAP 49 Exit Motor........................................................................................................... 2-42
RAP 50 Load MBF (C5) .................................................................................................. 2-43
RAP 51 Face Up Tray Open (E5).................................................................................... 2-43
500 Sheet Feeder
RAP 52 Low Paper Tray 2 (or Tray 3) 550 Sheet Feeder............................................... 2-45
RAP 53 550 Sheet Feeder Feed Clutch.......................................................................... 2-45
RAP 54 550 Sheet Feeder Assembly Not Recognized................................................... 2-46
Duplex Unit
RAP 55 Duplex Unit Fail or Removed (E9-1).................................................................. 2-47
RAP 56 Paper Jam Open Front Cover (E7).................................................................... 2-47
Offsetting Catch Tray
RAP 57 Offset Jam Open Rear Cover (E6-X)................................................................. 2-49
RAP 58 OCT Assy Not Recognized................................................................................ 2-50
RAP 59 Remove Output From Offset Bin (C5)................................................................ 2-50
RAP 60 OCT Stack Full Sensor...................................................................................... 2-51
RAP 61 OCT Offset Operation Not Performed................................................................ 2-51
Envelope Feeder
RAP 62 Envelope Feeder Not Recognized..................................................................... 2-53
RAP 63 Envelope Feed Clutch........................................................................................ 2-53
RAP 64 Envelope No Paper Sensor ............................................................................... 2-54
RAP 65 Load Envelope (C5)........................................................................................... 2-54
RAP 66 Envelope Feeder Jam (E2)................................................................................ 2-55

02/2000
2-2 DocuPrint N2125
Initial Issue
Status Indicator Repair Analysis Procedures