MINOLTA-QMS PagePro 9100 Series User manual

The essentials of imaging
.minolta-qms.com
PagePro™9100 Series
Service Manual
1750053-001B
www.minolta-qms.com

Trademarks
The following are registered trademarks of MINOLTA-QMS, Inc.: QMS and the
MINOLTA-QMS logo. Minolta, and PagePro are trademarks of Minolta Co., Ltd.
Other product names mentioned in this guide may also be trademarks or
registered trademarks of their respective owners.
Proprietary Statement
The digitally encoded software included with your printer is Copyrighted © 2002
by MINOLTA-QMS, Inc. All Rights Reserved. This software may not be
reproduced, modified, displayed, transferred, or copied in any form or in any
manner or on
any media, in whole or in part, without the express written permission of
MINOLTA-QMS, Inc.
Copyright Notice
This manual is Copyrighted © 2002 by MINOLTA-QMS, Inc., One Magnum Pass,
Mobile, AL 36618. All Rights Reserved. This document may not be copied, in
whole or part, nor transferred to any other media or language, without written
permission of MINOLTA-QMS, Inc.
Manual Notice
MINOLTA-QMS, Inc. reserves the right to make changes to this manual and to the
equipment described herein without notice. Considerable effort has been made to
ensure that this manual is free of inaccuracies and omissions. However,
MINOLTA-QMS, Inc. makes no warranty of any kind including, but not limited to,
any implied warranties of merchantability and fitness for a particular purpose with
regard to this manual. MINOLTA-QMS, Inc. assumes no responsibility for, or
liability for, errors contained in this manual or for incidental, special, or
consequential damages arising out of the furnishing of this manual, or the use of
this manual in operating the equipment, or in connection with the performance of
the equipment when so operated.

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1
CONTENTS
1. Safety Precautions for Inspection and Service ............................................................. 1
1-1. Outlines of safety precautions ............................................................................. 1
1-2. Warning ............................................................................................................... 1
1-3. Caution ................................................................................................................ 4
1-4. Other precautions ................................................................................................. 6
1-5. Precautions for service ........................................................................................ 8
1-6. Safety information ............................................................................................... 11
(1) Laser Safety ................................................................................................ 11
(2) Internal Laser Radiation ............................................................................. 11
1-7. Laser safety label ................................................................................................. 14
1-8. Laser caution label ............................................................................................... 14
1-9. Precautions for handling the equipment .............................................................. 14
2. INSTALLATION ......................................................................................................... 15
2-1. Installation environment ...................................................................................... 15
2-2. Usage environment .............................................................................................. 16
2-3. Installing the power supply ................................................................................. 16
2-4. Space requirements .............................................................................................. 17
(1) Standard ...................................................................................................... 17
(2) With options installed ................................................................................. 17
3. GENERAL INFORMATION ..................................................................................... 19
3-1. Specifications ...................................................................................................... 19
(1) Printer ....................................................................................................... 19
(2) 500-sheet lower feed unit (optional) ........................................................... 22
(3) Duplex unit (optional) ................................................................................ 23
(4) 4-bin mailbox (optional) ............................................................................. 23
3-2. Parts identification ............................................................................................... 24
3-3. Component diagram ............................................................................................ 26
3-4. Drive system ........................................................................................................ 27
(1) Overview of the drive system for the standard configuration .................... 27
(2) Diagram of the drive system for the standard configuration ...................... 28
(3) Overview of the drive system when options are installed .......................... 29
3-5. Electrical components layout .............................................................................. 30
(1) Printer ....................................................................................................... 30
(2) Lower feed unit (optional) .......................................................................... 32
(3) Duplex unit (optional) ................................................................................ 32
(4) 4-bin mailbox (optional) ............................................................................. 33
3-6. Electrical components functions .......................................................................... 34
(1) Printer ....................................................................................................... 34
(2) Lower feed unit (optional) .......................................................................... 35
(3) Duplex unit (optional) ................................................................................ 36
(4) 4-bin mailbox (optional) ............................................................................. 36

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(5) PWB-A (main control board) ..................................................................... 37
(6) PWB-D (new-imaging-cartridge detection board) ..................................... 38
(7) PU1 (power supply board ) ......................................................................... 38
(8) HV1 (high voltage unit ) ............................................................................. 39
(9) PWB-G (toner-empty detection board) ...................................................... 40
(10) PWB-H (paper full detection board) .......................................................... 40
(11) PWB-O (control panel board) ..................................................................... 40
(12) PWB-A (control board of the lower feed unit) ........................................... 41
(13) PWB-A (DUP) (control board of the duplex unit) ..................................... 41
(14) PWB-A (control board of the 4-bin mailbox) ............................................ 42
3-7. Video interface .................................................................................................... 43
(1) Overview .................................................................................................... 43
(2) Signal descriptions ...................................................................................... 44
3-8. Timing chart ........................................................................................................ 45
(1) Pre-process sequence .................................................................................. 45
(2) Print (print interval) sequence .................................................................... 46
(3) Post-process sequence ................................................................................ 46
4. MECHANICAL/ELECTRICAL .................................................................................. 47
4-1. Paper path ............................................................................................................ 47
(1) Standard configuration ............................................................................... 47
(2) With options installed ................................................................................. 49
4-2. Paper take-up section ........................................................................................... 50
(1) Multipurpose paper tray: paper take-up mechanisms & process ................ 50
(2) Multipurpose paper tray: paper feed retry control ...................................... 52
(3) Multipurpose paper tray: paper empty detection mechanism ..................... 53
(4) Multipurpose paper tray: paper near-empty detection mechanism ............ 54
(5) Universalpapercassette(firstthroughfourthpapercassettes):papertake-upmechanism
55
(6) Universal paper cassette (first paper cassette): paper feed retry control .... 55
(7) Lower feed unit (second through fourth paper cassettes): paper feed retry control
56
(8) Universal paper cassette (first paper cassette): paper empty detection mechanism
57
(9) Universal paper cassette (second through fourth paper cassettes): paper empty
detection mechanism .................................................................................. 58
(10) Universal paper cassette (first through fourth paper cassettes): paper near-empty
detection mechanism .................................................................................. 59
(11) Universal paper cassette: paper size detection mechanism ........................ 60
4-3. Imaging cartridge ................................................................................................. 61
(1) Overview .................................................................................................... 61
(2) Toner empty detection ................................................................................ 63
4-4. Drum charging ..................................................................................................... 65
4-5. Laser exposure ..................................................................................................... 66
4-6. Development ........................................................................................................ 67
4-7. Image transfer ...................................................................................................... 68
4-8. Fusing section ...................................................................................................... 69

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(1) Fusing temperature control circuit .............................................................. 70
(2) Heater lamp control .................................................................................... 70
(3) Overview of temperature control modes during stand-by .......................... 71
(4) Temperature control mode during stand-by: mode 1 ................................. 71
(5) Temperature control mode during stand-by: mode 2 ................................. 71
(6) Temperature control mode during stand-by: mode 3 ................................. 71
(7) Temperature control modes during printing ............................................... 72
(8) Temperature control: software protection .................................................. 73
(9) Temperature control: hardware protection ................................................. 73
(10) Temperature control: overheat protection .................................................. 73
4-9. Paper exit section ................................................................................................. 74
(1) Paper-full detection mechanism ................................................................. 75
(2) Paper output roller drive-switching mechanism ......................................... 76
(3) Paper-output-swiching mechanism ............................................................ 77
4-10. Duplex section (optional duplex unit) ................................................................. 78
(1) Overview .................................................................................................... 78
(2) Single-sided printing mechanism ............................................................... 79
(3) Double-sided printing mechanism .............................................................. 80
4-11. Sorting section (optional 4-bin mailbox) ............................................................. 81
(1) Drive mechanism ........................................................................................ 81
(2) Paper-switching mechanism ....................................................................... 82
(3) Bin-switching mechanism .......................................................................... 83
(4) Fed paper detection mechanism ................................................................. 84
(5) Full mailbin detection mechanism .............................................................. 84
5. MAINTENANCE/DISASSEMBLY ............................................................................ 85
5-1. Precautions for maintenance/disassembly ........................................................... 85
(1) Precautions for disassembly ...................................................................... 85
(2) Parts that must not be touched .................................................................... 85
(3) During transportation/storage the PWBs with MOS ICs: .......................... 85
(4) During replacement the PWBs with MOS ICs: .......................................... 85
(5) During Inspection the PWBs with MOS ICs: ............................................. 86
(6) During transportation/storage the imaging cartridge: ................................. 86
(7) Handling the imaging cartridge: ................................................................. 86
5-2. Cleaning schedule ................................................................................................ 87
5-3. Maintenance schedule ......................................................................................... 87
5-4. Required service tools ......................................................................................... 87
5-5. List of screws used .............................................................................................. 88
5-6. Printer disassembly procedures ........................................................................... 89
(1) Disassembly procedure chart ...................................................................... 89
(2) Pre-disassembly preparation 1 (removing the imaging cartridge) ............. 90
(3) Pre-disassembly preparation 2 (removing the multi-purpose paper tray) .. 91
(4) Pre-disassembly preparation 3 (removing the first paper cassette) ............ 92
(5) Pre-disassembly preparation 4 (removing the paper-full detection board) 93
(6) Pre-disassembly preparation 5 (removing the fusing unit) ......................... 94
(7) Replacing the exhaust filter ........................................................................ 96
(8) Replacing the paper take-up roller of the multi-purpose paper tray ........... 97

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(9) Replacing the toner empty detection board (PWB-G) ................................ 98
(10) Replacing the paper empty sensor (PC4) and the paper near-empty sensor (PC5)
for the multi-purpose paper tray ................................................................. 99
(11) Replacing the paper take-up solenoid (SL1) of the multi-purpose tray ..... 101
(12) Replacing the paper empty sensor (PC6) for the first paper cassette ......... 102
(13) Replacing the paper take-up rollers and the paper-separating roller for the first
paper cassette and the expansion paper cassettes ....................................... 103
(14) Replacing the heater (H1), thermostat (TS1), thermal fuse (TF1), thermistor 1
(TH1), and heat roller ................................................................................. 107
(15) Replacing the paper output sensor (PC3) of the fusing section .................. 115
(16) Replacing the image transfer roller unit ..................................................... 116
(17) Replacing the new-imaging-cartridge detection board (PWB-D) .............. 117
(18) Removing the outer covers ......................................................................... 118
(19) Replacing the control panel ........................................................................ 120
(20) Removing the shield ................................................................................... 121
(21) Replacing thermistor 2 (TH2) ..................................................................... 122
(22) Replacing the humidity sensor (HS1) ......................................................... 122
(23) Replacing the power supply unit fan motor ................................................ 123
(24) Replacing interlock switch 1 (S2) .............................................................. 124
(25) Replacing the main control board (PWB-A) .............................................. 125
(26) Replacing the print head unit ...................................................................... 127
(27) Replacing the ozone fan motor (M6) .......................................................... 128
(28) Replacing the power supply board (PU1) ................................................... 129
(29) Replacing the high voltage unit (HV1) ....................................................... 130
(30) Replacing the power switch (S1) ................................................................ 131
(31) Replacing interlock switch 2 (S3) .............................................................. 132
(32) Replacing the main motor (M1) and imaging cartridge drive motor (M2) 133
(33) Replacing the paper size detection switch (S4), the paper empty sensor (PC6), and
the paper take-up clutch (CL2) for the first paper cassette ......................... 134
(34) Replacing the fusing fan motor (M3) ......................................................... 136
(35) Replacing the transport roller clutch (CL1) and the paper sensor (PC1) of the
image transfer section ................................................................................. 137
5-7. Duplex unit disassembly procedures ................................................................... 139
(1) Replacing the transport motor (M1), the switchback motor (M2), the control board
(PWB-A), and the duplex cover switch (PC1) ........................................... 139
5-8. 500-sheet lower feed unit disassembly procedures ............................................. 141
(1) Replacing the control board (PWB-A) ....................................................... 141
(2) Replacing the paper take-up clutch (CL1) and the paper take-up motor (M1) 142
(3) Replacing the paper sensor (PC1) .............................................................. 143
(4) Replacing the paper empty sensor (PC2) ................................................... 144
(5) Replacingthepapersizedetectionswitch(S1)andthepapernear-emptysensor(PC3)
145
5-9. 4-bin mailbox disassembly procedures ................................................................ 146
(1) Replacing the lower transport sensor (PC9) ............................................... 146
(2) Replacing the sensors of mailbins 1 and 3 ................................................. 147
(3) Replacing the sensors of mailbin 2 ............................................................. 148

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(4) Replacing the sensors of mailbin 4 and the cover sensor ........................... 149
(5) Replacing the set sensor (PC12) and the control board (PWB-A) ............. 151
(6) Replacing the transport motor (M1) and the solenoids .............................. 152
6. ADJUSTMENT ............................................................................................................ 155
6-1. Adjustment of image registration ........................................................................ 155
7. TROUBLESHOOTING ............................................................................................... 157
7-1. Paper misfeed detection ...................................................................................... 157
(1) Detecting paper remaining in the machine ................................................ 157
(2) Detecting a paper misfeed while feeding ................................................... 157
(3) Operation when a paper misfeed is detected .............................................. 158
(4) Conditions under which a paper misfeed is detected ................................. 158
(5) Procedure for resetting after a paper misfeed is detected ........................... 160
7-2. Malfunction detection .......................................................................................... 161
(1) Laser malfunction - Service Call 10 H-Sync .............................................. 161
(2) Polygon motor malfunction - Service Call 0A Polygon Motor .................. 161
(3) Fusing malfunctions
Service Call 18 Fuser Warmup ................................................................... 161
(4) Power supply unit fan motor malfunction
Service Call 0C Power Supply ................................................................... 161
(5) Ozone fan motor malfunction
Service Call 0D Power Supply Fan 2 ......................................................... 161
(6) Fusing fan motor malfunction
Service Call 0B Internal Fan ...................................................................... 162
(7) Image transfer voltage error
Service Call 0F High Voltage ..................................................................... 162
(8) Main motor malfunction
Service Call 08 Main Motor ....................................................................... 162
(9) Imaging cartridge drive motor malfunction
Service Call 09 IC Motor ........................................................................... 162
(10) 4-bin mailbox transmission error
Service Call 02 I/F Communication ........................................................... 162
7-3. Troubleshooting for paper misfeeds .................................................................... 163
(1) Paper misfeed when the power switch is turned on ................................... 163
(2) Paper misfeed between the paper feed-in section and the transport section 163
(3) Paper misfeed between the transport section and the paper feed-out section 164
(4) Paper jam display messages and associated sections ................................. 165
7-4. Troubleshooting for operation malfunctions ....................................................... 166
(1) Hardware errors .......................................................................................... 166
(2) No power .................................................................................................... 166
7-5. Image quality troubleshooting ............................................................................. 167
. INDEX .......................................................................................................................... 171

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1
1
SAFETY PRECAUTIONS FOR INSPECTION AND SERVICE
1. SAFETY PRECAUTIONS FOR INSPECTION AND
SERVICE
1-1. Outlines of safety precautions
When performing inspection and service procedures, observe the following precautions to prevent
accidents and ensure utmost safety.
✽Depending on the model, some of the precautions given do not apply.
Different markings are used to denote specific meanings as detailed below.
Indicates a potentially hazardous situation which, if not avoided, could
result in death or serious injury.
Indicates a potentially hazardous situation which, if not avoided, may
result in minor or moderate injury. It may also be used to alert against
unsafe practices.
The following graphic symbols are used to give instructions that need to be observed.
Used to call the service technician’s attention to what is graphically represented inside the
marking (including a warning).
Used to prohibit the service technician from doing what is graphically represented inside
the marking.
Used to instruct the service technician to do what is graphically represented inside the
marking.
1-2. Warning
1. Always observe precautions.
.
2. Before starting any procedures, be sure to unplug the power cord.
WARNING
CAUTION
WARNING
• Parts requiring special attention in this product include a label containing the mark
shown on the left plus precautionary notes. Be sure to observe the precautions.
• Be sure to observe the “Safety Information” given in the Operator’s Manual.
• This product contains a high-voltage unit and a circuit with a large current capacity that
may cause an electric shock or burn.
• The product also contains parts that can jerk suddenly and cause injury.
• This product uses a laser. Laser beam leakage may cause eye damage or blindness.

2
3. Use the specified parts
.
4. Handle the power cord with care and never use a multiple outlet.
5. Be careful with the high-voltage parts.
6. Do not work with wet hands.
7. Do not touch a high-temperature part.
8. Maintain a grounded connection at all times. (This item may not apply in the USA.)
• For replacement parts, always use the genuine parts specified in the manufacturer’s
parts manual. Installing a wrong or unauthorized part could cause dielectric breakdown,
overload, or undermine safety devices, resulting in possible electrical shock or fire.
• Replace a blown electrical fuse or thermal fuse with its corresponding genuine part
specified in the manufacturer’s parts manual. Installing a fuse of a different make or rat-
ing could lead to a possible fire. If a thermal fuse blows frequently, the temperature con-
trol system may have a problem and action must be taken to eliminate the cause of the
problem.
• Do not break, crush or otherwise damage the power cord. Placing a heavy object on the
power cord, or pulling or bending it may damage it, resulting in a possible fire or electri-
cal shock.
• Do not use a multiple outlet to which any other appliance or machine is connected.
• Be sure the power outlet meets or exceeds the specified capacity.
• A part marked with the symbol shown on the left carries a high voltage. Touching it
could result in an electrical shock or burn. Be sure to unplug the power cord before ser-
vicing this part or the parts near it.
• Do not unplug or plug in the power cord, or perform any kind of service or inspection
with wet hands. Doing so could result in an electrical shock.
• A part marked with the symbol shown on the left and other parts such as the exposure
lamp and fusing roller can be very hot while the machine is energized. Touching them
may result in a burn.
• Wait until these parts have cooled down before replacing them or any surrounding parts.
• Be sure to connect the ground wire to the ground terminal even when performing an
inspection or repair. Without proper grounding, electrical leakage could result in an
electrical shock or fire.
• Never connect the ground wire to a gas pipe, water pipe, telephone ground wire, or a
lightning conductor.

3
1
SAFETY PRECAUTIONS FOR INSPECTION AND SERVICE
9. Do not modify the product.
10. Restore all parts and harnesses to their original positions.
• Modifying this product in a manner not authorized by the manufacturer may result in a
fire or electrical shock. If this product uses a laser. Laser beam leakage may cause eye
damage or blindness.
• To promote safety and prevent product damage, make sure the harnesses are returned to
their original positions and properly secured in their clamps and saddles in order to
avoid hot parts, high-voltage parts, sharp edges, or being crushed.
• To promote safety, make sure that all tubing and other insulating materials are returned
to their original positions. Make sure that floating components mounted on the circuit
boards are at their correct distance and position off the boards.

4
1-3. Caution
1. Precautions for Service Jobs
2. Precautions for Servicing with Covers and Parts Removed
3. Precautions for the Working Environment
t
CAUTION
• A toothed washer and spring washer, if used originally, must be reinstalled. Omitting
them may result in contact failure which could cause an electric shock or fire.
• When reassembling parts, make sure that the correct screws (size, type) are used in the
correct places. Using the wrong screw could lead to stripped threads, poorly secured
parts, poor insulating or grounding, and result in a malfunction, electric shock or injury.
• Take great care to avoid personal injury from possible burrs and sharp edges on the
parts, frames and chassis of the product.
• When moving the product or removing an option, use care not to injure your back or
allow your hands to be caught in mechanisms.
• Wherever feasible, keep all parts and covers mounted when energizing the product.
• If energizing the product with a cover removed is absolutely unavoidable, do not touch
any exposed live parts and use care not to allow your clothing to be caught in the mov-
ing parts. Never leave a product in this condition unattended.
• Never place disassembled parts or a container of liquid on the product. Parts falling into,
or the liquid spilling inside, the mechanism could result in an electric shock or fire.
• Never use a flammable spray near the product. This could result in a fire.
• Make sure the power cord is unplugged before removing or installing circuit boards or
plugging in or unplugging connectors.
• Always use the interlock switch actuating jig to actuate an interlock switch when a
cover is opened or removed. The use of folded paper or some other object may damage
the interlock switch mechanism, possibly resulting in an electric shock, injury or blind-
ness.
• The product must be placed on a flat, level surface that is stable and secure.
• Never place this product or its parts on an unsteady or tilting workbench when servic-
ing.
• Provide good ventilation at regular intervals if a service job must be done in a confined
space for a long period of time.
• Avoid dusty locations and places exposed to oil or steam.
• Avoid working positions that may block the ventilation ports of the product.

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SAFETY PRECAUTIONS FOR INSPECTION AND SERVICE
4. Precautions for Handling Batteries (Lithium, Nickel-Cadmium, etc.)
5. Precautions for the Laser Beam (Only for Products Employing a Laser)
• Replace a rundown battery with the same type as specified in the manufacturer’s parts
manual.
• Before installing a new battery, make sure of the correct polarity of the installation or
the battery could burst.
• Dispose of used batteries according to the local regulations. Never dispose of them at
the user’s premises or attempt to try to discharge one.
• Removing the cover marked with the following caution label could lead to possible
exposure to the laser beam, resulting in eye damage or blindness. Be sure to unplug the
power cord before removing this cover.
• If removing this cover while the power is ON is unavoidable, be sure to wear protective
laser goggles that meet specifications.
• Make sure that no one enters the room when the machine is in this condition.
• When handling the laser unit, observe the “Precautions for Handling Laser Equipment.”

6
1-4. Other precautions
• When handling circuit boards, observe the “HANDLING of PWBs.”
• The PC Drum is a very delicate component. Observe the precautions given in “HANDLING OF
THE PC DRUM” because mishandling may result in serious image problems.
• Note that replacement of a circuit board may call for readjustments or resetting of particular
items, or software installation.
ALL Areas
CAUTION
Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type recommended by the manufacturer.
Dispose of used batteries according to the manufacturer’s instructions.
Germany
VORSICHT!
Explosionsgefahr bei unsachgemäßem Austausch der Batterie.
Ersatz nur durch denselben oder einen vom Hersteller empfohlenen gleichwertigen Typ.
Entsorgung gebrauchter Batterien nach Angaben des Herstellers.
France
ATTENTION
Il y a danger d’explosion s’il y a remplacement incorrect de la batterie.
Remplacer uniquement avec une batterie du même type ou d’un type équivalent recommandé par le
constructeur.
Mettre au rebut les batteries usagées conformément aux instructions du fabricant.
Denmark
ADVARSEL!
Lithiumbatteri - Eksplosionsfare ved fejlagtig håndtering.
Udskiftning må kun ske med batteri af samme fabrikat og type.
Levér det brugte batteri tilbage til leverandøren.
Finland, Sweden
VA R O l T U S
Paristo voi räjähtää, jos se on virheellisesti asennettu.
Vaihda paristo ainoastaan laitevalmistajan suosittelemaan tyyppiin.
Hävitä käytetty paristo valmistajan ohjeiden mukaisesti.
VA R N I N G
Explosionsfara vid felaktigt batteribyte.
Använd samma batterityp eller en ekvivalent typ som rekommenderas av apparattillverkaren.
Kassera använt batteri enligt fabrikantens instruktion.
Other Precautions
Used Batteries Precautions

7
1
SAFETY PRECAUTIONS FOR INSPECTION AND SERVICE
Norway
ADVARSEL
Eksplosjonsfare ved feilaktig skifte av batteri.
Benytt samme batteritype eller en tilsvarende type anbefalt av apparatfabrikanten.
Brukte batterier kasseres i henhold til fabrikantens instruksjoner.

8
1-5. Precautions for service
When performing inspection and service procedures, observe the following precautions to prevent
mishandling of the machine and its parts.
✽Depending on the model, some of the precautions do not apply.
• When the user is using a word processor or personal computer from a wall outlet of the same line,
take necessary steps to prevent the circuit breaker from opening due to overloads.
• Never disturb the LAN by breaking or making a network connection, altering termination, install-
ing or removing networking hardware or software, or shutting down networked devices without
the knowledge and express permission of the network administrator or the shop supervisor.
1. DIS/REASSEMBLY, ADJUSTMENT
• To reassemble the product, reverse the order of disassembly unless otherwise specified.
2. TROUBLESHOOTING
• If a component on a PWB or any other functional unit including a motor is defective, the text only
instructs you to replace the whole PWB or functional unit and does not give troubleshooting pro-
cedures applicable within the defective unit.
• All troubleshooting procedures contained herein assume that there are no breaks in the harnesses
and cords and all connectors are plugged into the right positions.
• The procedures preclude possible malfunctions due to noise and other external causes.
• Check the area surrounding the service site for any signs of damage, wear or need of repair.
• Keep all disassembled parts in good order and keep tools under control so that none will be lost or
damaged.
• After completing a service job, perform a safety check. Make sure that all parts, wiring and
screws are returned to their original positions.
• Do not pull out the toner hopper while the toner bottle is turning. This could result in a damaged
motor or locking mechanism.
• If the product is to be run with the front door open, make sure that the toner hopper is in the
locked position.
• Do not use an air gun or vacuum cleaner for cleaning the ATDC Sensor and other sensors, as they
can cause electrostatic destruction. Use a blower brush and cloth. If a unit containing these sen-
sors is to be cleaned, first remove the sensors from the unit.
Precautions Before Service
How to Use this Book
Precautions for Service

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1
SAFETY PRECAUTIONS FOR INSPECTION AND SERVICE
• Be sure to unplug the printer from the outlet before attempting to service the printer.
• The basic rule is not to operate the printer anytime during disassembly. If it is absolutely neces-
sary to run the printer with its covers removed, use care not to allow your clothing to be caught in
revolving parts such as the timing belt and gears.
• Before attempting to replace parts and unplug connectors, make sure that the power cord of the
printer has been unplugged from the wall outlet.
• While the product is energized, do not unplug or plug connectors into the circuit boards or har-
nesses.
• Never use flammable sprays near the printer.
• A used battery should be disposed of according to the local regulations and never be discarded
casually or left unattended at the user’s premises.
• When reassembling parts, make sure that the correct screws (size, type) and toothed washer are
used in the correct places.
• If it becomes necessary to replace the thermal fuse or any other fuse mounted on a board, be sure
to use one of the rating marked on the blown fuse. Always note the rating marked on the fuse, as
the rating and mounting site or number used are subject to change without notice.
• Never create a closed circuit across connector pins except those specified in the text and on the
printed circuit.
• When creating a closed circuit and measuring a voltage across connector pins specified in the text,
be sure to use the GND wire.
1. During Transportation/Storage:
• During transportation or when in storage, new P.W. Boards must not be indiscriminately removed
from their protective conductive bags.
• Do not store or place P.W. Boards in a location exposed to direct sunlight and high temperature.
• When it becomes absolutely necessary to remove a Board from its conductive bag or case, always
place it on its conductive mat in an area as free as possible from static electricity.
• Do not touch the pins of the ICs with your bare hands.
• Protect the PWBs from any external force so that they are not bent or damaged.
2. During Inspection/Replacement:
• Avoid checking the IC directly with a multimeter; use connectors on the Board.
• Never create a closed circuit across IC pins with a metal tool.
• Before unplugging connectors from the P.W. Boards, make sure that the power cord has been
unplugged from the outlet.
• When removing a Board from its conductive bag or conductive case, do not touch the pins of the
ICs or the printed pattern. Place it in position by holding only the edges of the Board.
• When touching the PWB, wear a wrist strap and connect its cord to a securely grounded place
whenever possible. If you cannot wear a wrist strap, touch a metal part to discharge static electric-
ity before touching the PWB.
Precautions for Dis/Reassembly
Precautions for Circuit Inspection
Handling of PWBs

10
• Note that replacement of a PWB may call for readjustments or resetting of particular items.
• The magnet roller generates a strong magnetic field. Do not bring it near a watch, floppy disk,
magnetic card, or CRT tube.
✽Only for Products Employing an Imaging Cartridge.
1. During Transportation/Storage:
• The storage temperature is in the range between –20°C and +40°C.
• In summer, avoid leaving the Imaging Cartridge in a car for a long time.
2. Handling:
• Store the Imaging Cartridge in a place that is not exposed to direct sunlight.
3. Precautionary Information on the PC Drum Inside the Imaging Cartridge:
• Use care not to contaminate the surface of the PC Drum with oil-base solvent, fingerprints, and
other foreign matter.
• Do not scratch the surface of the PC Drum.
• Do not attempt to wipe clean the surface of the PC Drum.
4. Be sure to keep the imaging cartridge out of the reach of children. Ingesting contents of the
imaging cartridge is harmful to your health.
Handling of Other Parts
Handling of the Imaging Cartridge
WARNING
Do not throw toner or the toner bottle into a fire. Toner expelled from the fire may
cause burns.

11
1
SAFETY PRECAUTIONS FOR INSPECTION AND SERVICE
1-6. Safety information
(1) Laser Safety
• This is a digital machine certified as a Class 1 laser product. There is no possibility of danger from
the laser, provided the machine is serviced according to the instructions in this manual.
(2) Internal Laser Radiation
• This product employs a Class 3b laser diode that emits an invisible laser beam.
• The print head section consists of two units: the print head unit and the mirror unit. The laser
diode and a polygon mirror are incorporated into the print head unit. A laser-beam-reflecting mir-
ror is incorporated into the mirror unit.
• The laser beam is emitted from the print head unit, passes through the mirror unit, then is radiated
into the interior of the printer through the laser aperture of the mirror unit.
• The print head section (print head unit and mirror unit) is not a field service item. Therefore, it
must not be disassembled or adjusted under any circumstance.
semiconductor laser specifications
Maximum power of the laser diode 15 mW
Maximum average radiation power
37 µW
(at laser aperture of mirror unit)
70 µW
(at laser Aperture of print head unit)
Wavelength 775-795 nm
Print head unit
Mirror unit
Laser Aperture ofthe Print head unit
This figure shows the view inside the Rear Upper Cover with the Imaging Cartridge
removed.

12
the USA, Canada
(CDRH Regulation)
• This machine is certified as a Class I Laser product under Radiation Performance Stan-dard
according to the Food, Drug and Cosmetic Act of 1990. Compliance is mandatory for Laser prod-
ucts marketed in the United States and is reported to the Center for Devices and Radiological
Health (CDRH) of the U.S. Food and Drug Administration of the U.S. Department of Health and
Human Services (DHHS). This means that the device does not produce hazardous laser radiation.
• The label shown to page 22 indicates compliance with the CDRH regulations and must be
attached to laser products marketed in the United States.
All Areas
Denmark
CAUTION
Use of controls, adjustments or performance of procedures other than those specified in this man-
ual may result in hazardous radiation exposure.
Semiconductor laser
Maximum power of the laser diode 15 mW
Wavelength 775-795 nm
CAUTION
Use of controls, adjustments or performance of procedures other than those specified in this man-
ual may result in hazardous radiation exposure.
Semiconductor laser
Maximum power of the laser diode 15 mW
Wavelength 775-795 nm
ADVARSEL
Usynlig laserstråling ved åbning, når sikkerhedsafbrydere er ude af funktion.
Undgå udsættelse for stråling. Klasse 1 laser produkt der opfylder IEC60825 sikkerheds kravene.
Halvlederlaser
Laserdiodens højeste styrke 15 mW
bølgelængden 775-795 nm