Oki B 6100 User manual

OKI B6100
Laser Printer
Base Engine Technical Manual
Version 1.0

NOTICE
The information in this manual is subject to change without notice.
Every effort has been made to ensure that the information in this document is complete, accu-
rate, and up-to-date. The manufacturer assumes no responsibility for the results of errors
beyond its control.
While all reasonable efforts have been made to make this document as accurate and helpful as
possible, we make no warranty of any kind, expressed or implied, as to the accuracy or com-
pleteness of the information contained herein.
Copyright © 2003 Oki Data Americas, Inc. All rights reserved.

FEDERAL COMMUNICATIONS COMMISSION NOTICE
This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protec-
tion against harmful interference in a commercial installation. This equipment generates, uses,
and can radiate radio frequency energy and, if not installed and used in accordance with the
instruction, may cause harmful interference to radio communications. However there is no guar-
antee that interference will not occur in a particular installation. If this equipment does cause
harmful interference to radio or television reception, which can be determined by turning the
equipment off and on, the user is encouraged to try to correct the interference by one or more of
the following measures:
• Re–orient or relocate the receiving antenna
• Increase the separation between the equipment and receiver
• Connect the equipment into an outlet on a circuit different from that to which the receiver is
connected
• Consult the dealer or an experienced radio/television technician for help.
The user may find the following booklet prepared by the Federal
Communications Commission helpful:
“How to Identify and Resolve Radio-TV Interference Problems”. This booklet is available from
the U.S. Government Printing Office, Washington D.C. 20402, Stock No. 004-000-00345-4.
Modifications
Changes or modifications to this equipment not expressly approved
by Xerox International Partners may void the user's right to
operate the equipment.

CANADIAN NOTICE
This digital apparatus does not exceed the Class B limits for radio noise emissions from digital
apparatus set out in the Radio interference regulations of the Canadian Department of Commu-
nications.
AVIS CANADIEN
Cet appareil numerique est conforme aux limites émission de bruits radioélectriques pour les
appareils de classe B stipulés das le réglement sur le brouillage radioéletrique du Ministére des
Communcations du Canada.
EUROPEAN NOTICE
This equipment has been tested and determined to be compliant with VDE requirements for a
Class B device.
HINWEIS
Hiermit wird bescheinigt, dass der Asama Laserdrucker, in bereinstimmung mit den Betimmun-
ngen der Vfg 104ß 984 funkenstört ist.
Der Deutschen Bundespost wurde das Inverkehrbringen dieses Gertëes angqeigt und die Bere-
chtigung zur berprufung der Serie auf Einhaltung der Bestimmungen eingeräumt.
XEROX INTERNATIONAL PARTNERS

CLASS 1 LASER PRODUCT
This 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 scanning unit produces a beam that, if looked into, could
cause eye damage. Service procedures must be followed exactly a 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.
Use of Controls, adjustments, or performance of procedures other than those specified herein
may result in a hazardous radiation exposure.

Unpacking the Base Engine
Be sure to carry the Base Engine by two or more persons taking care to hold it hori-
zontally.
Be sure to take great care for persons not to hurt when carrying it.
Open the package and check the Base Engine for damage in transit.
Remove the Holder BTR from the Base Machine after unpacking procedure of Base Engine.
Removal procedure of the Holder BTR is as follows.
1. Open the
Cover Assy Front (PL1.1.9).
Take care not to give a damage to the Roll surface of the Roll Assy BTR when do the
following procedure.
Holding the Base Machine when do the following procedure.
2. Catch in the handle of the Holder BTR:L.And pull out the Holder BTR:L from the Base Machine to your
side with diagonal and upper direction.
3. Catch in the handle of the Holder BTR:R.And pull out the Holder BTR:R from the Base Machine to your
side with diagonal and upper direction.

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Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix
About this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .x
Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xi
Service Section
1. The Service Flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2. The Fault Isolation Procedure (FIP) Flowchart . . . . . . . . . . . . . . . . . . . . 2-1
3. Primary FIPs: Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
4. Primary FIPs: Printer Performance Problems . . . . . . . . . . . . . . . . . . . . . 4-1
5. Primary FIPs: Image Quality Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
6. Secondary FIPs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
7. Diagnostic Tool and Test Pattern Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
8. Diagnostic Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1
9. Adjustment Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1
10. Removal and Replacement Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1
11. Locating P/J Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-1
12. Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-1
Technical Reference Section
13. Principles of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-1
14. Wiring Diagrams and Signal Information . . . . . . . . . . . . . . . . . . . . . . . . 14-1
15. Printer Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-1
Optional Equipment Technical Manuals
Option Feeder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TRAY-1
Envelope Feeder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ENV-1
Duplex . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DUP-1
Offset Catch Tray. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . OCT-1

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OKI B6100 Laser Printer - Base Engine Technical Manual ix
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Introduction
This manual contains technical and service information for the OKI B6100 (page per minute) Laser Printer.
The information is based on and validated using the basic model printer. Expect some minor discrepancies
in physical appearance, hardware count, and electrical readings due to engineering modifications and
manufacturing changes during the life of the product.
The information in this manual is presented with the assumption that the OEM customer has designed their
PWB ESS (Controller) to implement service diagnostics exactly as described in the Video Interface Speci-
fications and in this manual.
This manual serves as both a technical reference manual and as a guideline for OEM clients who wish to
prepare their own service manual. Other uses are prohibited.
This manual is prepared for use in the United States by Xerox International Partners, Technical Services
Group. This manual is copyrighted. No portion may be copied, reproduced, submitted to, or read by XIP
external customers without the prior consent of XIP.

x OKI B6100 Laser Printer - Base Engine Technical Manual
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About this Manual
Symbols Used in This Manual
NOTE: A Note indicates an operating or maintenance procedure, practice, or condition that is necessary
to accomplish a task efficiently.
CAUTION: A Caution indicates an operating or maintenance procedure, practice, or condition
that, if not strictly observed, could result in damage to, or destruction of, equip-
ment.
WARNING: A Warning indicates an operating or maintenance procedure, practice, or condi-
tion that, it not strictly observed, could result in injury or loss of life.
Additional documentation for OKI B6100
•User Manual
The manual that describes how to operate and maintain the OKI B6100 Laser Printer
•Performance Data
The FX internal OEM document that provides detailed OKI B6100 performance information
•Interface Specifications
The FX internal OEM document that provides detailed OKI B6100 video interface specification data
•Spare Parts List
The XIP internal document that provides part numbers for the OKI B6100 printer

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Safety information
Follow these safety instructions to prevent accidents while servicing the OKI B6100 Laser Printer. Always
be aware of the potential dangers that are present when you are working with electrical or mechanical
equipment.
Power supply and electrical components
Before starting any service procedure, switch off the printer power and unplug the power cord from the wall
outlet. If you must service the printer with power applied, be aware of the potential for electrical shock.
Mechanical components
Hand crank to inspect sprockets and gears. Do not try to hand crank the printer while the Motor Assy is
running.
WARNING: Do not touch any electrified component unless you are instructed to do so by a
service procedure

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ROS Assy
WARNING: This printer uses a laser as part of the printing process. The laser beam is a very
powerful, straight, narrow beam of light that produces extreme heat at its focal
point. The laser beam in the Asama printer is invisible. Although you cannot see
the beam, it can still cause severe damage. Direct eye exposure to the laser beam
may cause eye injury or blindness.
To avoid permanent eye damage, follow these directions:
• Before starting any service procedure, switch off the printer power and unplug the power cord from
the wall outlet.
• Do not disassemble the ROS Assy or any laser component displaying a Laser Warning Sticker.
• Use caution when you are working around the ROS Assy or if you are performing laser related repair
procedures.
• The OKI B6100 Laser Printer is equipped with two safety switches; the Switch Assy I/L Front (the
switch that breaks the 24V circuit when the Cover Assy Front opens) and the Switch Assy I/L Rear
(the switch that breaks the 3.3V circuit for the Motor Assy Exit when the Cover Rear opens). The
Switch Assy I/L Front supplies the power to all internal components. The Switch Assy I/L Rear sup-
plies the power to the Motor Assy Exit. It is extremely dangerous to cheat the Switch Assy I/L while
the CRU is removed.
Safety Components
Make sure fuses, interlock switches, covers and panels are all functioning properly after you have rein-
stalled or replaced them.

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Technical Services
Sections 1 The Service Flowchart
1. Service Flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
1.1 Identify the Problem. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
1.2 Clean the Printer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
1.3 Final Checkout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

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Technical Services
1. Service Flowchart
First identify the following phenomena when any problems occur.
・ Occurrence of Error/Status Code
・ Problem of image quality
・ Problem of printer performance
Go to the section corresponding to the problem.

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Technical Services
1.1. Identify the Problem
1. Verify that the reported problem does exist.
2. Check for any error codes.
3. Execute three test prints.
4. Take note of any print quality problems in the three test prints.
5. Take note of any mechanical or electrical abnormalities that are present.
6. Take note of any unusual noise or smell coming from the printer.
7. When you have identified the problem, go to the next block that is listed in the Service Flowchart.
1.2. Clean the Printer
1. Switch OFF the printer power.
2. Disconnect the AC power cord from the wall outlet.
3. Disconnect the power cord from the printer.
4. Open the Cover Assy Front.
5. Remove the CRU.
Cover the CRU with a dark cloth and store it away from strong light.
6. Inspect for and remove any foreign matter such as paper clips, staples, scraps of paper, paper dust, or
toner from the interior of the printer.
7. Clean the interior with a lint–free cloth, dampened slightly with cold water.
8. Clean the rubber rollers with a lint-free cloth, dampened slightly with cold water. Use a clean, lint-free
cloth to dry the rollers.
9. Clean the Laser Scanner window with a soft, dry, lint-free cloth.
10. Use canned air to clean the BTR.
Do not touch the BTR with your fingers.
Do not clean the BTR with a brush or a damp cloth.
11. While cleaning, inspect the interior of the printer for damaged wires, loose connections, toner leakage,
and worn or damaged part.
12. If the CRU appears excessively dirty or obviously damaged, replace it with a new one.
13. When you have finished cleaning the printer, go to the next block that is listed in the Service Flowchart.
CAUTION: Use only water to clean the interior of the printer. Do not use
chemical solvents or cleaners.
Do not use any type of oil or lubricant on printer parts.
Solvents, cleaners, and oils may damage printer components.

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Technical Services
1.3. Final Checkout
1. Reinstall all of the covers that you removed while servicing the printer.
2. Check that the original error code is gone and there are no new error codes displayed.
3. Execute a series of test prints.
The printer generates the test prints without jamming and without any print image defects.
4. Take note of any mechanical or electrical abnormalities that are present.
The printer runs through the entire print cycle without any obvious problems.
5. Take note of any unusual noise or smell coming from the printer.
During the print cycle there are no unusual noises or smells coming from the printer.
6. The call is completed.
Clean up your work area, and return the printer to the customer.

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Fault Isolation Procedures
Section 2 The Fault Isolation Procedure (FIP) Flowchart Contents
2. The FIP Flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
General Notes on Using FIPs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
FIP Flowchart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

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Fault Isolation Procedures
2. The FIP Flowchart
If you used the Service Flowchart, it should have directed you to this section. Now, follow the FIP Flow-
chart to analyze your printer problem.
How to Use the FIP Flowchart
1. If you have an error code displayed on the screen of the Diagnostic Tool; go to the ERROR CODE box.
2. If you have a printer operation problem; go to the PRINTER PERFORMANCE box.
3. If you have a print image problem; go to the IMAGE QUALITY box.
4. Follow the arrow leading from your problem box to the individual FIP (Fault Isolation Procedure) that
corresponds to your error code, printer operation problem, or print image problem.
5. Follow the instructions presented in the FIP.
How to Follow a FIP
1. Each numbered step in a FIP instructs you to perform a certain action or procedure.
2. The instruction is followed by a question.
3. If your response to the question is Yes, then follow the instructions for a Yes reply.
4. If your response to the question is No, then follow the instructions for a No reply.
5. FIPs often ask you to take voltage readings at certain test points within the printer.
Appendices D and E contain information on signal names and test point locations.
6. FIPs often ask you to replace a printer component.
Section 9 Removal/Replacement provides you detailed procedures for removing and replacing all
major parts of the Asama printer.

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Fault Isolation Procedures
General Notes on Using FIPs
1. FIPs assume there is no malfunction in printer controller. If you are unable to fix a problem using the
FIPS, we recommend that you replace the printer controller.
2. FIPs use new and "known good" components as troubleshooting tools. We recommend you carry a
spare CRU, PWBA HKB MCU, and PWB ESS.
3. Unless indicated otherwise, the instruction "switch ON main power" means for you to switch ON printer
power, and let the printer proceed through power-on diagnostics and warm-up until it is on-line and
ready to print.
4. Conventions used to represent connectors:
P/J XX means a Plug and its corresponding Jack, are connected.
PXX means a Plug is disconnected. (Unless this plug is soldered to a PWB).
JXX means a Jack is disconnected. (Unless this jack is soldered to a PWB).
5. When you are instructed to take a voltage reading between "P/J A–B and P/J X–Y", place the red
probe (+) of your meter on pin B of P/J A, and place the black probe (–) of your meter on pin Y of P/J X.
6. When you are instructed to take voltage readings between "P/J X and P/J Y" (without specified pin
numbers), check all voltage carrying pins. Refer to the Wiring/Connection Diagrams for signals and pin
numbers.
7. When you are instructed to take a voltage reading, the black probe (–) is generally connected to a pin
that is either RTN (Return) or SG (Signal Ground). You can substitute any RTN pin or test point in the
printer, and you can use FG (Frame Ground) in place of any SG pin or test point.
8. Unless a FIP instructs you otherwise; before measuring voltages make sure the printer is switched ON,
the CRU and Cassette Assy are installed, and the Cover Assy Front and Cover Assy Rear are closed
(Interlock Switch is actuated).
9. All voltage values given in the FIPs are approximate values. Actual measured voltages may vary
somewhat from the given values.
10. FIPs may instruct you to remove or replace a component. Refer to Section 10 Removal and Replace-
ment, for information on how to remove and reinstall a component.
11. When a FIP instructs you to replace a component, and that component is part of a larger assembly,
you should replace the entire assembly.

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Fault Isolation Procedures
FIP Flowchart