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Service Manual
LBP3300 Series
LBP3300
Dec 29 2005
Application
This manual has been issued by Canon Inc. for qualified persons to learn technical theory, installation, maintenance, and repair
of products. This manual covers all localities where the products are sold. For this reason, there may be information in this
manual that does not apply to your locality.
Corrections
This manual may contain technical inaccuracies or typographical errors due to improvements or changes in products. When
changes occur in applicable products or in the contents of this manual, Canon will release technical information as the need
arises. In the event of major changes in the contents of this manual over a long or short period, Canon will issue a new edition
of this manual.
The following paragraph does not apply to any countries where such provisions are inconsistent with local law.
Trademarks
The product names and company names used in this manual are the registered trademarks of the individual companies.
Copyright
This manual is copyrighted with all rights reserved. Under the copyright laws, this manual may not be copied, reproduced or
translated into another language, in whole or in part, without the written consent of Canon Inc.
COPYRIGHT © 2001 CANON INC.
Printed in Japan
Caution
Use of this manual should be strictly supervised to avoid disclosure of confidential information.
Introduction
Symbols Used
This documentation uses the following symbols to indicate special information:
Symbol Description
Indicates an item of a non-specific nature, possibly classified as Note, Caution, or Warning.
Indicates an item requiring care to avoid electric shocks.
Indicates an item requiring care to avoid combustion (fire).
Indicates an item prohibiting disassembly to avoid electric shocks or problems.
Indicates an item requiring disconnection of the power plug from the electric outlet.
Indicates an item intended to provide notes assisting the understanding of the topic in question.
Memo
Indicates an item of reference assisting the understanding of the topic in question.
REF.
Provides a description of a service mode.
Provides a description of the nature of an error indication.
Introduction
The following rules apply throughout this Service Manual:
1. Each chapter contains sections explaining the purpose of specific functions and the relationship between electrical and mechanical systems with refer-
ence to the timing of operation.
In the diagrams, represents the path of mechanical drive; where a signal name accompanies the symbol , the arrow indicates the
direction of the electric signal.
The expression "turn on the power" means flipping on the power switch, closing the front door, and closing the delivery unit door, which results in
supplying the machine with power.
2. In the digital circuits, '1'is used to indicate that the voltage level of a given signal is "High", while '0' is used to indicate "Low".(The voltage value, how-
ever, differs from circuit to circuit.) In addition, the asterisk (*) as in "DRMD*" indicates that the DRMD signal goes on when '0'.
In practically all cases, the internal mechanisms of a microprocessor cannot be checked in the field. Therefore, the operations of the microprocessors
used in the machines are not discussed: they are explained in terms of from sensors to the input of the DC controller PCB and from the output of the
DC controller PCB to the loads.
The descriptions in this Service Manual are subject to change without notice for product improvement or other purposes, and major changes will be com-
municated in the form of Service Information bulletins.
All service persons are expected to have a good understanding of the contents of this Service Manual and all relevant Service Information bulletins and be
able to identify and isolate faults in the machine."
Contents
Contents
Chapter 1 PRODUCT DESCRIPTION
1.1 Features .....................................................................................................................................................1- 1
1.1.1 Feature .................................................................................................................................................................... 1- 1
1.2 System Construction ..................................................................................................................................1- 1
1.2.1 System Construction ............................................................................................................................................... 1- 1
1.3 Product Specifications ................................................................................................................................1- 1
1.3.1 Product Specifications ............................................................................................................................................. 1- 1
1.4 Name of Parts.............................................................................................................................................1- 2
1.4.1 External View........................................................................................................................................................... 1- 2
1.4.2 Cross Sectional Views............................................................................................................................................. 1- 3
1.5 Using the Machine ......................................................................................................................................1- 4
1.5.1 Control Panel........................................................................................................................................................... 1- 4
1.6 Safety .........................................................................................................................................................1- 4
1.6.1 Safety of Laser Light................................................................................................................................................ 1- 4
1.6.2 Regulations Under the Center for Devices and Radiological Health (CDRH) ......................................................... 1- 4
1.6.3 Safety of Toner ........................................................................................................................................................ 1- 4
1.6.4 Handling the Laser Unit ........................................................................................................................................... 1- 4
Chapter 2 TECHNICAL REFERENCE
2.1 Functional Configuration.............................................................................................................................2- 1
2.1.1 Outline ..................................................................................................................................................................... 2- 1
2.2 Basic Sequense..........................................................................................................................................2- 1
2.2.1 Basic Operation Sequence...................................................................................................................................... 2- 1
2.2.2 Power-on sequence................................................................................................................................................. 2- 1
2.3 LASER EXPOSURE SYSTEM ...................................................................................................................2- 2
2.3.1 Overview/Configuration ........................................................................................................................................... 2- 2
2.3.1.1 Outline...................................................................................................................................................................................... 2- 2
2.3.1.2 Laser Control Circuit ................................................................................................................................................................ 2- 3
2.3.2 Controlling the Laser Activation Timing ................................................................................................................... 2- 5
2.3.2.1 Laser emission control ............................................................................................................................................................. 2- 5
2.3.2.2 Horizontal synchronous control................................................................................................................................................ 2- 5
2.3.3 Laser Control ........................................................................................................................................................... 2- 5
2.3.3.1 Automatic power control (APC)................................................................................................................................................ 2- 5
2.3.3.2 Image masking control............................................................................................................................................................. 2- 5
2.3.4 Laser Scanner Motor Control .................................................................................................................................. 2- 6
2.3.4.1 Outline...................................................................................................................................................................................... 2- 6
2.3.4.2 Scanner motor speed control................................................................................................................................................... 2- 7
2.3.4.3 Scanner motor failure detection ............................................................................................................................................... 2- 7
2.4 IMAGE FORMATION SYSTEM..................................................................................................................2- 7
2.4.1 Overview/Configuration ........................................................................................................................................... 2- 7
2.4.1.1 Outline...................................................................................................................................................................................... 2- 7
2.4.1.2 Print Process............................................................................................................................................................................ 2- 8
2.4.1.3 Electrostatic latent image formation block ............................................................................................................................... 2- 8
2.4.1.4 Development block .................................................................................................................................................................. 2- 9
2.4.1.5 Transfer block ........................................................................................................................................................................ 2- 10
2.4.1.6 Fixing block ............................................................................................................................................................................ 2- 11
2.4.1.7 Photosensitive drum cleaning block....................................................................................................................................... 2- 11
2.4.2 High-Voltage Control ............................................................................................................................................. 2- 11
2.4.2.1 Outline.................................................................................................................................................................................... 2- 11
2.4.2.2 Primary charging bias generation .......................................................................................................................................... 2- 12
2.4.2.3 Developing bias generation ................................................................................................................................................... 2- 12
Contents
2.4.2.4 Transfer charging bias generation ......................................................................................................................................... 2- 12
2.4.2.5 Fixing bias generation............................................................................................................................................................ 2- 13
2.4.2.6 Cartridge presence detection................................................................................................................................................. 2- 13
2.5 PICKUP AND FEEDING SYSTEM........................................................................................................... 2- 13
2.5.1 Overview/Configuration..........................................................................................................................................2- 13
2.5.1.1 Outline.................................................................................................................................................................................... 2- 13
2.5.2 Detecting Jams ......................................................................................................................................................2- 14
2.5.2.1 Jam Detection Outline............................................................................................................................................................ 2- 14
2.5.2.2 Delay Jams ............................................................................................................................................................................ 2- 15
2.5.2.3 Stationary Jams ..................................................................................................................................................................... 2- 15
2.5.2.4 Other Jams ............................................................................................................................................................................ 2- 15
2.5.3 Cassette Pickup .....................................................................................................................................................2- 15
2.5.3.1 Cassette pick-up .................................................................................................................................................................... 2- 15
2.5.4 Multi-purpose Pickup .............................................................................................................................................2- 15
2.5.4.1 Manual feed ........................................................................................................................................................................... 2- 15
2.5.5 Duplex Feeding......................................................................................................................................................2- 16
2.5.5.1 Outline.................................................................................................................................................................................... 2- 16
2.5.5.2 Operation ............................................................................................................................................................................... 2- 17
2.6 EXTERNAL AND CONTROLS SYSTEM ................................................................................................. 2- 17
2.6.1 Fan.........................................................................................................................................................................2- 17
2.6.1.1 Fan motor control................................................................................................................................................................... 2- 17
2.6.2 Power Supply.........................................................................................................................................................2- 18
2.6.2.1 Power Supply......................................................................................................................................................................... 2- 18
2.6.2.2 Protective Functions .............................................................................................................................................................. 2- 19
2.7 ENGINE CONTROL SYSTEM ................................................................................................................. 2- 20
2.7.1 Video Controller .....................................................................................................................................................2- 20
2.7.1.1 Outline.................................................................................................................................................................................... 2- 20
2.7.1.2 Outline of Operation by Block ................................................................................................................................................ 2- 20
2.7.2 Engine Controller ...................................................................................................................................................2- 20
2.7.2.1 Outline.................................................................................................................................................................................... 2- 20
2.8 FIXING UNIT/DELIVERY SYSTEM.......................................................................................................... 2- 22
2.8.1 Overview/Configuration..........................................................................................................................................2- 22
2.8.1.1 Outline.................................................................................................................................................................................... 2- 22
2.8.2 Various Control Mechanisms .................................................................................................................................2- 23
2.8.2.1 Fixing Temperature Control ................................................................................................................................................... 2- 23
2.8.2.2 Protective Functions .............................................................................................................................................................. 2- 24
Chapter 3 DISASSEMBLY AND ASSEMBLY
3.1 EXTERNAL AND CONTROLS SYSTEM ................................................................................................... 3- 1
3.1.1 Rear Cover...............................................................................................................................................................3- 1
3.1.1.1 Preparation for removing the rear cover unit. .......................................................................................................................... 3- 1
3.1.1.2 Removing the rear cover unit................................................................................................................................................... 3- 1
3.1.2 Right Cover ..............................................................................................................................................................3- 1
3.1.2.1 Detaching the right cover ......................................................................................................................................................... 3- 1
3.1.3 Left Cover ................................................................................................................................................................3- 1
3.1.3.1 Detaching the left cover ........................................................................................................................................................... 3- 1
3.1.4 Upper Cover.............................................................................................................................................................3- 1
3.1.4.1 Preparation for detaching the upper cover unit........................................................................................................................ 3- 1
3.1.4.2 Detaching the upper cover unit ................................................................................................................................................ 3- 2
3.1.5 Front Cover ..............................................................................................................................................................3- 2
3.1.5.1 Preparation for removing the front cover unit........................................................................................................................... 3- 2
3.1.5.2 Removing the front cover unit .................................................................................................................................................. 3- 2
3.1.6 Main Drive Unit ........................................................................................................................................................3- 2
3.1.6.1 Preparation for removing the main drive assembly.................................................................................................................. 3- 2
3.1.6.2 Removing the main drive assembly ......................................................................................................................................... 3- 2
3.1.7 Duplexing Drive Unit ................................................................................................................................................3- 3
3.1.7.1 Removing the duplexing drive assembly ................................................................................................................................. 3- 3
3.1.8 Operation Panel Unit................................................................................................................................................3- 3
Contents
3.1.8.1 Detaching the control panel ..................................................................................................................................................... 3- 3
3.1.9 Engine controller board ........................................................................................................................................... 3- 4
3.1.9.1 Preparation for removing the engine controller PCB ............................................................................................................... 3- 4
3.1.9.2 Removing the engine controller PCB....................................................................................................................................... 3- 4
3.1.10 Duplexing Driver Board.......................................................................................................................................... 3- 4
3.1.10.1 Preparation for removing the duplexing driver PCB............................................................................................................... 3- 4
3.1.10.2 Removing the duplexing driver PCB ...................................................................................................................................... 3- 4
3.1.11 Video Controller Board .......................................................................................................................................... 3- 5
3.1.11.1 Removing the video controller PCB ....................................................................................................................................... 3- 5
3.1.12 USB Board............................................................................................................................................................. 3- 5
3.1.12.1 Removing the USB PCB ........................................................................................................................................................ 3- 5
3.1.13 Door Switch ........................................................................................................................................................... 3- 5
3.1.13.1 Removing the door switch...................................................................................................................................................... 3- 5
3.1.14 Main Body Fan....................................................................................................................................................... 3- 5
3.1.14.1 Preparation for removing the fan............................................................................................................................................ 3- 5
3.1.14.2 Removing the fan ................................................................................................................................................................... 3- 5
3.2 LASER EXPOSURE SYSTEM ...................................................................................................................3- 6
3.2.1 Laser Scanner Unit.................................................................................................................................................. 3- 6
3.2.1.1 Preparation for removing the laser scanner unit ...................................................................................................................... 3- 6
3.2.1.2 Removing the laser scanner unit ............................................................................................................................................. 3- 6
3.3 IMAGE FORMATION SYSTEM..................................................................................................................3- 6
3.3.1 Transfer Charging Roller ......................................................................................................................................... 3- 6
3.3.1.1 Removing the transfer corona roller......................................................................................................................................... 3- 6
3.4 PICKUP AND FEEDING SYSTEM .............................................................................................................3- 6
3.4.1 Cassette Pickup Roller ............................................................................................................................................ 3- 6
3.4.1.1 Cassette pick-up roller ............................................................................................................................................................. 3- 6
3.4.2 Cassette Pickup solenoid ........................................................................................................................................ 3- 6
3.4.2.1 Preparation for removing the cassette pick-up solenoid .......................................................................................................... 3- 6
3.4.2.2 Removing the cassette pick-up solenoid ................................................................................................................................. 3- 6
3.4.3 Cassette Separation Pad......................................................................................................................................... 3- 7
3.4.3.1 Removing the separation pad .................................................................................................................................................. 3- 7
3.4.4 Multi-purpose Pickup Solenoid ................................................................................................................................ 3- 7
3.4.4.1 Preparation for removing the manual pick-up solenoid............................................................................................................ 3- 7
3.4.4.2 Removing the manual pick-up solenoid ................................................................................................................................... 3- 7
3.4.5 Registration Roller ................................................................................................................................................... 3- 7
3.4.5.1 Preparation for removing the registration roller........................................................................................................................ 3- 7
3.4.5.2 Removing the registration roller ............................................................................................................................................... 3- 7
3.4.6 Main Motor............................................................................................................................................................... 3- 7
3.4.6.1 Preparation for removing the main motor ................................................................................................................................ 3- 7
3.4.6.2 Removing the main motor........................................................................................................................................................ 3- 7
3.4.7 Reversal Solenoid ................................................................................................................................................... 3- 7
3.4.7.1 Preparation for removing the reverse solenoid ........................................................................................................................ 3- 7
3.4.7.2 Removing the reverse solenoid ............................................................................................................................................... 3- 7
3.4.8 Duplexing Unit ......................................................................................................................................................... 3- 7
3.4.8.1 Preparation for removing the duplexing unit ............................................................................................................................ 3- 7
3.4.8.2 Removing the duplexing unit.................................................................................................................................................... 3- 8
3.5 FIXING SYSTEM ........................................................................................................................................3- 8
3.5.1 Fixing Unit................................................................................................................................................................ 3- 8
3.5.1.1 Preparation for removing the fixing assembly.......................................................................................................................... 3- 8
3.5.1.2 Removing the fixing assembly ................................................................................................................................................. 3- 8
3.5.2 Fixing Film Unit........................................................................................................................................................ 3- 9
3.5.2.1 Preparation for removing the fixing film unit............................................................................................................................. 3- 9
3.5.2.2 Removing the fixing film........................................................................................................................................................... 3- 9
3.5.3 Fixing Pressure Roller ........................................................................................................................................... 3- 10
3.5.3.1 Preparation for removing the fixing pressure roller ................................................................................................................ 3- 10
3.5.3.2 Removing the fixing pressure roller ....................................................................................................................................... 3- 10
Chapter 4 MAINTENANCE AND INSPECTION
Contents
4.1 Periodically Replaced Parts ....................................................................................................................... 4- 1
4.1.1 Periodically Replaced Parts .....................................................................................................................................4- 1
4.2 Consumables ............................................................................................................................................. 4- 1
4.2.1 Life Expectancy of Consumable Parts .....................................................................................................................4- 1
4.3 Periodical Service....................................................................................................................................... 4- 1
4.3.1 Periodic Service .......................................................................................................................................................4- 1
4.4 Cleaning ..................................................................................................................................................... 4- 1
4.4.1 Cleaning During Service Visit ..................................................................................................................................4- 1
Chapter 5 TROUBLESHOOTING
5.1 MEASUREMENT AND ADJUSTMENT...................................................................................................... 5- 1
5.1.1 Test Print..................................................................................................................................................................5- 1
5.1.1.1 Test Print.................................................................................................................................................................................. 5- 1
5.1.2 Mechanical Adjustment............................................................................................................................................5- 1
5.1.2.1 Checking the Nip Width (fixing pressure roller)........................................................................................................................ 5- 1
5.2 SERVICE TOOLS ...................................................................................................................................... 5- 2
5.2.1 Standard Tools.........................................................................................................................................................5- 2
5.2.2 Special Tools ...........................................................................................................................................................5- 2
5.2.3 Solvent/Oil List .........................................................................................................................................................5- 2
5.3 ERROR CODE TABLE............................................................................................................................... 5- 2
5.3.1 Error Code ...............................................................................................................................................................5- 2
Chapter 6 APPENDIX
6.1 OUTLINE OF ELECTRICAL COMPONENTS ............................................................................................ 6- 1
6.1.1 Clutch/Solenoid........................................................................................................................................................6- 1
6.1.1.1 Solenoid ................................................................................................................................................................................... 6- 1
6.1.2 Motor........................................................................................................................................................................6- 1
6.1.2.1 Motor........................................................................................................................................................................................ 6- 1
6.1.3 Fan...........................................................................................................................................................................6- 2
6.1.3.1 Fan........................................................................................................................................................................................... 6- 2
6.1.4 Sensor......................................................................................................................................................................6- 2
6.1.4.1 Sensor...................................................................................................................................................................................... 6- 2
6.1.5 PCBs........................................................................................................................................................................6- 3
6.1.5.1 PCB.......................................................................................................................................................................................... 6- 3
Chapter 1 PRODUCT DESCRIPTION
Contents
Contents
1.1 Features ..........................................................................................................................................................................1-1
1.1.1 Feature.......................................................................................................................................................................................... 1-1
1.2 System Construction ......................................................................................................................................................1-1
1.2.1 System Construction .................................................................................................................................................................... 1-1
1.3 Product Specifications....................................................................................................................................................1-1
1.3.1 Product Specifications ................................................................................................................................................................. 1-1
1.4 Name of Parts.................................................................................................................................................................1-2
1.4.1 External View .............................................................................................................................................................................. 1-2
1.4.2 Cross Sectional Views ................................................................................................................................................................. 1-3
1.5 Using the Machine .........................................................................................................................................................1-4
1.5.1 Control Panel ............................................................................................................................................................................... 1-4
1.6 Safety .............................................................................................................................................................................1-4
1.6.1 Safety of Laser Light ................................................................................................................................................................... 1-4
1.6.2 Regulations Under the Center for Devices and Radiological Health (CDRH)............................................................................ 1-4
1.6.3 Safety of Toner ............................................................................................................................................................................ 1-4
1.6.4 Handling the Laser Unit............................................................................................................................................................... 1-4
Chapter 1
1.1 Features
1.1.1 Feature
0011-2880
1. Compact, high-speed and high-resolution printer
Regardless of its compact size that enables an installation on side of desks, this printer realizes the printing speed of 21 pages per minute in letter-size paper with
the resolution of 600 dpi.
2. Short wait time and low power consumption
The printer utilizes the on-demand fixing method that turns on the heater only during print operations. This shortens wait time, and enables low power
consumption during stand by period.
3. Automatic duplex printing
The printer enables an automatic duplex printing by installing the duplexing unit as a standard equipment in the printer.
1.2 System Construction
1.2.1 System Construction
0011-5497
F-1-1
T-1-1
[1] Paper Feeder PF-35
[2] Network Board NB-C1
1.3 Product Specifications
1.3.1 Product Specifications
0011-2522
Body installation method desktop page printer
Photosensitive medium OPC drum
Exposure method semiconductor laser
Development method Toner projection development
Transfer method by roller
Separation method by curvature
Cassette pickup method by pad
Multifeeder pickup method by pad
Drum cleaning method by blade
Fixing method on-demand
Delivery method face-down/face-up
Toner supply type by toner cartridge
about 6000 prints (A4, single-sided; at 5% image ratio)
Warm-up time in standby: 0 sec (at power-on: 10 sec or less)
Print area top: 5 mm; bottom: 5 mm; left/right: 5 mm (if envelope, top, bottom, left,
right: 10 mm)
Printing resolution 600dpi
First print time 9 sec or less (approx.; A4)
Print speed (A4) 21 pages/min (approx.)
Cassette paper size A4, B5, A5, Legal, Letter, Executive
Multi-purpose paper size A4, B5, A5, Legal, Letter, Executive, Envelope DL, Envelope COM10,
Envelope C5, Envelope Monarch, Index Card, Custom Paper Size (width
76.2 to 215.9 mm, length 127.0 to 355.6 mm)
Cassette paper type plain paper (64 to 90 g/m2), heavy paper (91 to 120 g/m2), recycled
paper,
Multi-purpose paper type plain paper (64 to 90 g/m2), heavy paper (91 to 163 g/m2), recycled
paper, transparency, label paper, envelop (DL, COM10, C5, Monarch,
B5)
Cassette capacity 250 sheets (approx.; plain paper, 64 g/m2)
Multi-purpose capacity 1 sheet
Delivery tray stack 65sheets (Face-down) /1sheet(Face-up Output Slot)
Memory 8 MB (internal; no optional memory available)
1-1
Chapter 1
Operating environment 10 to 32.5 deg C
(Temperature range)
Operating environment 20% to 80% RH
(Humidity range)
Noise 52.8 dB or less (during printing; based on ISO9296; announced noise
emission)
Power supply rating AC100V±10% (50/60Hz ±2Hz)
Power consumption (Maximum) 790W or less (approx.; 20 deg C; for input of rated power supply;
including peak value lasting 1 sec or more)
Dimensions 370 (W) x 375 (D) x 258 (H)mm
Weight printer: Approx;11kg; toner cartridge: Approx,0.8kg(2.5K)
Option paper feeder
1.4 Name of Parts
1.4.1 External View
0011-2877
[2]
[1]
[9]
[8]
[3]
[7] [4]
[6] [5]
[10]
[15]
[11]
[14]
[13] [12]
F-1-2
[1] Face-down Output Tray [9] Front Cover
[2] Control Panel [10] Expansion Slot
[3] Right cover [11] USB Connector
[4] Power Switch [12] Left cover
[5] Paper Cassette [13] Duplex Unit Cover
[6] Manual Feed Slot [14] Power Socket
[7] Manual Feed Slot Cover [15] Output Selection Cover
[8] Paper Guides
1-2
Chapter 1
1.4.2 Cross Sectional Views
0011-2878
[1] [2] [3] [4] [5] [6] [7]
[17] [16] [15] [14] [13] [12] [11] [10] [9] [8]
F-1-3
[1] Face-down delivery roller [10] Registration roller
[2] Fixing film unit [11] Duplex pick-up roller
[3] Laser/scanner unit [12] Registration shutter
[4] Primary charging roller [13] Transfer charging roller
[5] Developing cylinder [14] Photosensitive drum
[6] Toner cartridge [15] Duplex feed roller
[7] Feed roller [16] Pressure roller
[8] Separation pad [17] Face-up delivery roller
[9] Pick-up roller
1-3
Chapter 1
1.5 Using the Machine
1.5.1 Control Panel
0011-2879
[1]
[2]
[3]
[4]
[5]
F-1-4
On There is no paper in any paper source.
[1] Load Paper Indicator
Blinking: No paper or paper of an inappropriate size s loaded
[2] Paper Jam Indicator Blinking A paper jam is occurring, disabling printing.
On Service call is occurring.
[3] Alarm Indicator
Blinking An error is occurring, disabling printing.
On The printer is ready to print.
[4]Ready Indicator The printer is busy performing some kind of processing or operation, such as
Blinking
printing, warming up, cleaning, or pausing a job.
[5] Cancel Job Key/Cancel Job Indicator Pressing this key enables the cancellation of the jobs in which an error is
occurring and those in progress. The indicator comes on while pressing the key.
The indicator blinks while a job is in the cancellation process.
1.6 Safety
1.6.1 Safety of Laser Light
0011-2523
Laser light can prove to be hazardous to the human body. The machine's laser unit is fully enclosed in a protective housing and external covers so that its light will
not escape outside as long as the machine is used normally.
1.6.2 Regulations Under the Center for Devices and Radiological Health (CDRH)
0011-2524
The CDRH of the US Food and Drug Administration put into effect regulations governing the sale of laser products in the US on August 2, 1976. These regulations
apply to all laser products produced on and after August 1, 1976, and a laser product cannot be sold unless it has been certified to comply with the regulations. The
following is the label used to indicate that the product has been certified under the regulations, and all laser products sold in the US must bear the label.
F-1-5
1.6.3 Safety of Toner
0011-2525
The machine's toner is a non-toxic material composed of plastic, iron, and small amounts of dye.
Do not put the toner into fire. It may explode.
Toner on the Skin or Clothes
1. If your skin or clothes came into contact with toner, use dry tissue to remove the toner, and then wash with water.
2. Do not use warm or hot water, which will cause the toner to jell, permanently fusing it with the fibers of the clothes.
3. Do not bring toner into contact with vinyl material. They are likely to react with each other.
1.6.4 Handling the Laser Unit
0011-2526
The laser scanner unit emits invisible laser light inside it. If exposed to laser light, the human eye can irreparably be damaged. Never attempt to disassemble the
laser scanner unit. (It is not designed for servicing in the field).
The covers around the laser scanner unit are identified by the following label.
1-4
Chapter 1
DANGER Invisible laser radiation when open.
AVOID DIRECT EXPOSURE TO BEAM.
CAUTION INVISIBLE LASER RADIATION WHEN OPEN.
AVOID EXPOSURE TO BEAM.
ATTENTION RAYONNEMENT LASER INVISIBLE EN CAS D'O UVERTURE.
EXPOSITION DANGEREUSE AU FAISCEAU.
VORSICHT UNSICHTBARE LASERSTRAHLUNG. WENN ABDECKUNG GEOFFNET.
NICHT DEM STRAHL AUSSETZEN.
ATTENZIONE RADIAZIONE LASER INVISIOILE IN CASO DI APERTURA.
EVITARE L'ESPOSIZIONE AL FASCIO.
PRECAUCION RADIACION LASER INVISIBLE CUANDO SE ABRE.
EVITAR EXPONERSE AL RAYO.
VARO! AVATTAESSA OLET ALTTIINA NAKYMATTOMALLE
LASERSATEILYLLE. ALA KATSO SATEESEEN.
VARNING! OSYNLIG LASERSTRALNING NAR DENNA DEL AR
OPPNAD. BETRAKTA EJ STRALEN.
F-1-6
1-5
Chapter 2 TECHNICAL REFERENCE
Contents
Contents
2.1 Functional Configuration ...............................................................................................................................................2-1
2.1.1 Outline.......................................................................................................................................................................................... 2-1
2.2 Basic Sequense...............................................................................................................................................................2-1
2.2.1 Basic Operation Sequence ........................................................................................................................................................... 2-1
2.2.2 Power-on sequence ...................................................................................................................................................................... 2-1
2.3 LASER EXPOSURE SYSTEM.....................................................................................................................................2-2
2.3.1 Overview/Configuration .............................................................................................................................................................. 2-2
2.3.1.1 Outline.............................................................................................................................................................................................................2-2
2.3.1.2 Laser Control Circuit.......................................................................................................................................................................................2-3
2.3.2 Controlling the Laser Activation Timing..................................................................................................................................... 2-5
2.3.2.1 Laser emission control ....................................................................................................................................................................................2-5
2.3.2.2 Horizontal synchronous control ......................................................................................................................................................................2-5
2.3.3 Laser Control ............................................................................................................................................................................... 2-5
2.3.3.1 Automatic power control (APC) .....................................................................................................................................................................2-5
2.3.3.2 Image masking control ....................................................................................................................................................................................2-5
2.3.4 Laser Scanner Motor Control....................................................................................................................................................... 2-6
2.3.4.1 Outline.............................................................................................................................................................................................................2-6
2.3.4.2 Scanner motor speed control ...........................................................................................................................................................................2-7
2.3.4.3 Scanner motor failure detection ......................................................................................................................................................................2-7
2.4 IMAGE FORMATION SYSTEM .................................................................................................................................2-7
2.4.1 Overview/Configuration .............................................................................................................................................................. 2-7
2.4.1.1 Outline.............................................................................................................................................................................................................2-7
2.4.1.2 Print Process....................................................................................................................................................................................................2-8
2.4.1.3 Electrostatic latent image formation block .....................................................................................................................................................2-8
2.4.1.4 Development block .........................................................................................................................................................................................2-9
2.4.1.5 Transfer block ...............................................................................................................................................................................................2-10
2.4.1.6 Fixing block ..................................................................................................................................................................................................2-11
2.4.1.7 Photosensitive drum cleaning block..............................................................................................................................................................2-11
2.4.2 High-Voltage Control ................................................................................................................................................................ 2-11
2.4.2.1 Outline...........................................................................................................................................................................................................2-11
2.4.2.2 Primary charging bias generation............................................................................................................................................