Canon M3010 Service Manual

M3010 Series

Service Manual

Product Overview

Technical Overview

Periodical Services

Disassembly/Assembly

Adjustment

Trouble Shooting

Error Codes

Service Mode

Appendix

1 2 3 4 5 6 7 8

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 consent of Canon Inc.

© CANON INC. 2011

Caution

Use of this manual should be strictly supervised to avoid disclosure of confidential information.

Explanation of Symbols

The following symbols are used throughout this Service Manual.
Symbols	Explanation		Symbols			Explanation
	Check.					Remove the claw.
	Check visually.					Insert the claw.
	Check the noise.					Use the bundled part.
	Disconnect the connector.					Push the part.
	Connect the connector.					Plug the power cable.
	Remove the cable/wire
	from the cable guide or wire					Turn on the power.
	saddle.

Set the cable/wire to the cable guide or wire saddle.

Remove the screw.

Tighten the screw.

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 reference 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, however, 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 communicated 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

0Safety Precautions

	CDRH Provisions--------------------------------------------------------------	0-2
	Laser Safety---------------------------------------------------------------------	0-2
	About Laser Beams----------------------------------------------------------------	0-2
	Handling Laser Scanner Unit----------------------------------------------------	0-2
	Toner Safety---------------------------------------------------------------------	0-3
	About Toner--------------------------------------------------------------------------	0-3
	Handling Adhered Toner----------------------------------------------------------	0-3
	Notes on Handling Lithium Battery----------------------------------------	0-3
	Notes on Assembly/Disassembly------------------------------------------	0-3
1	Product Overview
	Product Lineup-----------------------------------------------------------------	1-2
	Host Machine------------------------------------------------------------------------	1-2
	Options--------------------------------------------------------------------------------	1-2
	Product Features--------------------------------------------------------------	1-2
	Product Features-------------------------------------------------------------------	1-2
	Specifications-------------------------------------------------------------------	1-3
	Product Specifications-------------------------------------------------------------	1-3
	Parts Name----------------------------------------------------------------------	1-4
	External View------------------------------------------------------------------------	1-4
	Front side of the machine-----------------------------------------------------------------	1-4
	Rear side of the machine------------------------------------------------------------------	1-4
	Cross Section View----------------------------------------------------------------	1-5
	Control Panel------------------------------------------------------------------------	1-5
2	Technical Overview
	Basic Configuration-----------------------------------------------------------	2-2
	Configuration function-------------------------------------------------------------	2-2
	Basic Sequence---------------------------------------------------------------------	2-2
	Basic Sequence of Operation------------------------------------------------------------	2-2

Print Sequence-------------------------------------------------------------------------------	2-3
Power-On Sequence-----------------------------------------------------------------------	2-4
Controller System--------------------------------------------------------------	2-5
Main Controller----------------------------------------------------------------------	2-5
Overview---------------------------------------------------------------------------------------	2-5
Engine Controller-------------------------------------------------------------------	2-5
General description-------------------------------------------------------------------------	2-5
Service Works-----------------------------------------------------------------------	2-6
At parts replacement-----------------------------------------------------------------------	2-6
Maintenance----------------------------------------------------------------------------------	2-6
Notes on service works--------------------------------------------------------------------	2-6
Original Exposure System---------------------------------------------------	2-7
Overview------------------------------------------------------------------------------	2-7
Major Components-----------------------------------------------------------------	2-7
Service Works-----------------------------------------------------------------------	2-8
At parts replacement-----------------------------------------------------------------------	2-8
Maintenance----------------------------------------------------------------------------------	2-8
Notes on service works--------------------------------------------------------------------	2-8
Laser Exposure System------------------------------------------------------	2-9
Overview------------------------------------------------------------------------------	2-9
Overview---------------------------------------------------------------------------------------	2-9
Controlling the Laser Activation Timing--------------------------------------	2-10
Laser ON/OFF Control--------------------------------------------------------------------	2-10
Horizontal Sync Control-------------------------------------------------------------------	2-10
Laser Control-----------------------------------------------------------------------	2-11
Auto Power Control (APC)---------------------------------------------------------------	2-11
Laser Scanner Motor Control---------------------------------------------------	2-11
Overview--------------------------------------------------------------------------------------	2-11
Scanner Motor Fault Detection---------------------------------------------------------	2-12
Service Works----------------------------------------------------------------------	2-12
At parts replacement----------------------------------------------------------------------	2-12
Maintenance---------------------------------------------------------------------------------	2-12
Notes on service works-------------------------------------------------------------------	2-12

Image Formation System--------------------------------------------------	2-13
Overview/Configuration----------------------------------------------------------	2-13
Overview--------------------------------------------------------------------------------------	2-13
Print Process--------------------------------------------------------------------------------	2-13
Static Latent Image Formation Block--------------------------------------------------	2-14
Development Block------------------------------------------------------------------------	2-14
Transfer Block-------------------------------------------------------------------------------	2-15
Fixing Block----------------------------------------------------------------------------------	2-15
Drum Cleaning Block----------------------------------------------------------------------	2-15
High-Voltage Control--------------------------------------------------------------	2-16
Overview--------------------------------------------------------------------------------------	2-16
Generating Primary Charging Bias----------------------------------------------------	2-16
Generating Developing Bias-------------------------------------------------------------	2-16
Generating Transfer Bias-----------------------------------------------------------------	2-16
Toner Cartridge---------------------------------------------------------------------	2-17
Toner Level Detection---------------------------------------------------------------------	2-17
Toner Cartridge Absence/Presence Detection--------------------------------------	2-17
Service Works----------------------------------------------------------------------	2-18
At parts replacement----------------------------------------------------------------------	2-18
Maintenance---------------------------------------------------------------------------------	2-18
Notes on service works-------------------------------------------------------------------	2-18
Fixing System-----------------------------------------------------------------	2-19
Overview/Configuration----------------------------------------------------------	2-19
Overview--------------------------------------------------------------------------------------	2-19
Main Parts of Fixing assembly----------------------------------------------------------	2-19
Various Control Mechanisms---------------------------------------------------	2-20
Fixing Temperature Control--------------------------------------------------------------	2-20
Protective Functions-----------------------------------------------------------------------	2-20
Other Functions--------------------------------------------------------------------	2-22
Throughput Down Control----------------------------------------------------------------	2-22
Service Works----------------------------------------------------------------------	2-23
At parts replacement----------------------------------------------------------------------	2-23
Maintenance---------------------------------------------------------------------------------	2-23
Notes on service works-------------------------------------------------------------------	2-23
Pickup Feed System--------------------------------------------------------	2-24
Overview-----------------------------------------------------------------------------	2-24
Overview--------------------------------------------------------------------------------------	2-24
Detecting Jams---------------------------------------------------------------------	2-25

Jam Detection Outline---------------------------------------------------------------------	2-25
Delay Jam------------------------------------------------------------------------------------	2-25
Stationary Jam------------------------------------------------------------------------------	2-27
Other Jams-----------------------------------------------------------------------------------	2-27
Service Works----------------------------------------------------------------------	2-28
At parts replacement----------------------------------------------------------------------	2-28
Maintenance---------------------------------------------------------------------------------	2-28
Notes on service works-------------------------------------------------------------------	2-28
External And Controls System--------------------------------------------	2-29
Power Supply-----------------------------------------------------------------------	2-29
Power Supply--------------------------------------------------------------------------------	2-29
Protective Functions-----------------------------------------------------------------------	2-29
Service Works----------------------------------------------------------------------	2-30
At parts replacement----------------------------------------------------------------------	2-30
Maintenance---------------------------------------------------------------------------------	2-30
Notes on service works-------------------------------------------------------------------	2-30

3 Periodical Services

Periodically Replaced Parts-------------------------------------------------	3-2
Periodically Replaced Parts------------------------------------------------------	3-2
Consumables-------------------------------------------------------------------	3-2
Consumables------------------------------------------------------------------------	3-2
Periodical Service-------------------------------------------------------------	3-3
Scheduled Servicing---------------------------------------------------------------	3-3
Cleaning--------------------------------------------------------------------------	3-3

4Disassembly/Assembly

Outline----------------------------------------------------------------------------	4-2
List Of Parts---------------------------------------------------------------------	4-3
External View------------------------------------------------------------------------	4-3
Front Side-------------------------------------------------------------------------------------	4-3
Rear Side--------------------------------------------------------------------------------------	4-3
List of Main Unit---------------------------------------------------------------------	4-4
Reader Unit-----------------------------------------------------------------------------------	4-4
Printer Unit------------------------------------------------------------------------------------	4-4
Electrical Components------------------------------------------------------------	4-5
Reader Unit-----------------------------------------------------------------------------------	4-5

Motor-------------------------------------------------------------------------------------------	4-5
Solenoid---------------------------------------------------------------------------------------	4-6
Sensor------------------------------------------------------------------------------------------	4-6
Switch------------------------------------------------------------------------------------------	4-7
Heater/Thermistor/Thermoswitch/-------------------------------------------------------	4-7
PCB---------------------------------------------------------------------------------------------	4-8
List of Connectors-------------------------------------------------------------	4-9
Reader Unit--------------------------------------------------------------------------	4-9
Printer Unit--------------------------------------------------------------------------	4-10
External Cover / Interior System-----------------------------------------	4-12
Layout Drawing--------------------------------------------------------------------	4-12
Front Side------------------------------------------------------------------------------------	4-12
Rear Side-------------------------------------------------------------------------------------	4-12
Removing the Left Cover--------------------------------------------------------	4-13
Removing the Right Cover------------------------------------------------------	4-14
Removing the Front Cover Unit------------------------------------------------	4-15
Preparation-----------------------------------------------------------------------------------	4-15
Procedure------------------------------------------------------------------------------------	4-15
Removing the Upper Cover-----------------------------------------------------	4-15
Preparation-----------------------------------------------------------------------------------	4-15
Procedure------------------------------------------------------------------------------------	4-15
Removing the Rear Cover-------------------------------------------------------	4-17
Preparation-----------------------------------------------------------------------------------	4-17
Procedure------------------------------------------------------------------------------------	4-17
Original Exposure System-------------------------------------------------	4-19
Layout Drawing--------------------------------------------------------------------	4-19
Removing the Copyboard Cover.----------------------------------------------	4-19
Removing the Reader Unit------------------------------------------------------	4-20
Preparation-----------------------------------------------------------------------------------	4-20
Procedure------------------------------------------------------------------------------------	4-20
Removing the Copyboard Glass Unit-----------------------------------------	4-21
Preparation-----------------------------------------------------------------------------------	4-21
Procedure------------------------------------------------------------------------------------	4-21
Removing the Reader Motor Unit---------------------------------------------	4-23
Preparation-----------------------------------------------------------------------------------	4-23
Procedure------------------------------------------------------------------------------------	4-23
Removing the CIS Unit-----------------------------------------------------------	4-26

Preparation-----------------------------------------------------------------------------------	4-26
Procedure------------------------------------------------------------------------------------	4-26
Controller System------------------------------------------------------------	4-28
Layout Drawing--------------------------------------------------------------------	4-28
Removing the Control Panel Unit----------------------------------------------	4-29
Removing the Drive Belt---------------------------------------------------------	4-29
Preparation-----------------------------------------------------------------------------------	4-29
Procedure------------------------------------------------------------------------------------	4-29
Removing the Main Motor-------------------------------------------------------	4-31
Preparation-----------------------------------------------------------------------------------	4-31
Procedure------------------------------------------------------------------------------------	4-31
Removing the Main Controller PCB-------------------------------------------	4-34
Preparation-----------------------------------------------------------------------------------	4-34
Procedure------------------------------------------------------------------------------------	4-34
After Replacing the Main Controller PCB--------------------------------------------	4-34
Removing the Engine Controller PCB----------------------------------------	4-35
Preparation-----------------------------------------------------------------------------------	4-35
Procedure------------------------------------------------------------------------------------	4-35
Removing the Paper Leading Edge Sensor--------------------------------	4-38
Preparation-----------------------------------------------------------------------------------	4-38
Procedure------------------------------------------------------------------------------------	4-38
Removing the Fixing Delivery/Paper Width Sensor PCB----------------	4-40
Preparation-----------------------------------------------------------------------------------	4-40
Procedure------------------------------------------------------------------------------------	4-40
Laser Exposure System----------------------------------------------------	4-42
Layout Drawing--------------------------------------------------------------------	4-42
Removing the Laser Scanner Unit--------------------------------------------	4-42
Preparation-----------------------------------------------------------------------------------	4-42
Procedure------------------------------------------------------------------------------------	4-42
Image Formation System--------------------------------------------------	4-44
Layout Drawing--------------------------------------------------------------------	4-44
Removing the Transfer Roller--------------------------------------------------	4-44
Fixing System-----------------------------------------------------------------	4-46
Layout Drawing--------------------------------------------------------------------	4-46
Removing the Fixing Assembly------------------------------------------------	4-46
Preparation-----------------------------------------------------------------------------------	4-46
Procedure------------------------------------------------------------------------------------	4-46

Pickup Feed System--------------------------------------------------------	4-51
Layout Drawing--------------------------------------------------------------------	4-51
Removing the Pickup Unit-------------------------------------------------------	4-51
Preparation-----------------------------------------------------------------------------------	4-51
Procedure------------------------------------------------------------------------------------	4-51
Removing the Pickup Roller----------------------------------------------------	4-54
Removing the Pickup Solenoid------------------------------------------------	4-55
Preparation-----------------------------------------------------------------------------------	4-55
Procedure------------------------------------------------------------------------------------	4-55
Removing the Separation Pad-------------------------------------------------	4-57

5	Adjustment
	Mechanical Adjustment-------------------------------------------------------	5-2
	Confirming Nip Width--------------------------------------------------------------	5-2
6	Trouble Shooting
	Test Print-------------------------------------------------------------------------	6-2
	Test Print Function-----------------------------------------------------------------	6-2
	Trouble Shooting Items-------------------------------------------------------	6-3
	Image Faults-------------------------------------------------------------------------	6-3
	Smudged/Streaked-------------------------------------------------------------------------	6-3
	Version Upgrade---------------------------------------------------------------	6-4
	Overview------------------------------------------------------------------------------	6-4
	Preparation---------------------------------------------------------------------------	6-4
	System Requirements----------------------------------------------------------------------	6-4
	Preparation------------------------------------------------------------------------------------	6-5
	Downloading System Software-------------------------------------------------	6-5

7Error Codes

Overview-------------------------------------------------------------------------	7-2
Error Codes---------------------------------------------------------------------	7-3

8Service Mode

Overview-------------------------------------------------------------------------

8-2

Entering Service Mode------------------------------------------------------------	8-2
Exiting Service Mode--------------------------------------------------------------	8-2
Screen Operation in Service Mode--------------------------------------------	8-3
COPIER--------------------------------------------------------------------------	8-4
DISPLAY------------------------------------------------------------------------------	8-4
ADJUST-------------------------------------------------------------------------------	8-5
FUNCTION---------------------------------------------------------------------------	8-7
COUNTER---------------------------------------------------------------------------	8-9
TYPE---------------------------------------------------------------------------------	8-10
TESTMODE-------------------------------------------------------------------	8-11
SCAN---------------------------------------------------------------------------------	8-11
COPY---------------------------------------------------------------------------------	8-12

Appendix

Service Tools----------------------------------------------------------------------	II
Solvent/Oil List-------------------------------------------------------------------	III
General Circuit Diagram------------------------------------------------------	IV
General Timing Chart-----------------------------------------------------------	V

Preparation---------------------------------------------------------------------------	8-2
Service Mode Menu----------------------------------------------------------------	8-2

Safety Precautions

■■CDRH Provisions ■■Laser Safety ■■Toner Safety

■■Notes on Handling

Lithium Battery M3010 Series ■■Notes on Assembly/

Disassembly

CDRH Provisions

Food and Drug CDRH (Center for Devices and Radiological Health) under FDA (Food and Drug Administration) enforced provisions of the section for laser and laser products on August 2, 1976. These provisions are applicable to all laser products manufactured or assembled after August 1, 1976 and allow only products certified their compliance with the provisions

to market in the US. Each product shall have affixed the applicable label as shown below to follow the labeling requirements prescribed in CDRH provisions.

Note that the wording included in labels is different depending on laser product classifications.

0-2

Laser Safety

About Laser Beams

Laser radiation may be hazardous to human. The laser scanner unit mounted in this device is sealed in the protective housing and the external cover to prevent laser beams from leaking to the environment. As long as the device is operated under normal conditions, users are safely guarded from laser leaks.

Handling Laser Scanner Unit

Before providing service works for the laser scanner unit and its peripherals, ensure to turn off the power of the device.

Any cover with potential dangers of laser beam reflection has affixed the caution label at the position shown in the figure below.

F-0-1

F-0-2

0-2

Toner Safety

About Toner

Toner is a non-toxic material composed of plastic, iron, small amount of pigment, etc.

Never throw toner in flames to avoid explosion.

Handling Adhered Toner

•Use dry tissue paper to wipe off toner adhered to skin or clothes and wash in water.

•Never use warm water for cleaning up toner to prevent toner particles from being able to soak into fibers permanently.

•Toner particles are reactive with vinyl polymers. Avoid contacting these materials.

Notes on Handling Lithium Battery

Replacing with wrong battery types may cause explosion.

Follow instructions to dispose used batteries properly.

0-3

Notes on Assembly/Disassembly

Follow the items below to assemble/disassemble the device.

1.Disconnect the power plug to avoid any potential dangers during assembling/disassembling works.

2.If not specially instructed, reverse the order of disassembly to reinstall.

3.Ensure to use the right screw type (length, diameter, etc.) at the right position when assembling.

4.To keep electric conduction, binding screws with washers are used to attach the grounding wire and the varistor. Ensure to use the right screw type when assembling.

5.Unless it is specially needed, do not operate the device with some parts removed.

6.Never remove the paint-locked screws when disassembling.

0-3

1Product Overview■■Product Lineup

■■Product Features ■■Specifications ■■Parts Name

1Product Overview

	1	Product Overview > Product Features > Product Features							1-2
	Product Lineup									Product Features
	Host Machine									Product Features
										1.Compact/high-speed printer
	Model name					MF3010
										This machine is a high-speed B&W printer with a compact body design and the print speed
	Configuration					3in1 single-sided platen
										of 19 ppm (LTR).
										2.Reduced standby time and low energy consumption
										This machine uses the on-demand fixing method in which power is supplied to the heater
										only at printing.
	Design									This realized the reduction of standby time and low energy consumption during standby.
										3.Reduced operation noise and stabilized image quality
										This machine uses the belt drive method for the Main Motor's drive transmission.
										The operation noise is reduced and image quality is stabilized compared to the
										conventional gear drive method (see NOTE).
										4.Improved user operability
			ADF			-
	Engine			2-sided		-				User operability is improved by concentrating the maintenance processes (jam removal
				1-sided		Yes				and cartridge replacement) in a single location at the Upper Cover.
	LAN			Port		-
			FAX			-
							T-1-1			Note:
	Options									By changing the drive method from gear to belt, uneven cycle of the Photosensitive
										Drum is reduced. This makes it possible to realize stabilized image quality.

None

1-2

1Product Overview > Product Features > Product Features

1Product Overview > Specifications > Product Specifications

Specifications

Product Specifications

Copyboard	Fixed Copyboard
Machine installation method	Desktop
Light source	LED (RGB)
Image reading method	CIS (color)
Photosensitive medium	OPC Drum
Exposure method	Laser beam (semiconductor laser)
Charging method	Roller charging
Developing method	Toner projection
Transfer method	Roller transfer
Separation method	Curvature separation
Pickup method	Pickup Tray: Pad separation method
	Multi-purpose Tray: None
Delivery method	Face-down
Drum cleaning method	Blade cleaning
Fixing method	On-demand method
Toner supplying method	Toner Cartridge replacement
Toner level detection	None
Document type	Sheet
Maximum document size	216 mm x 297 mm
Magnification ratio	100 % magnification
	50 to 200 % (in increments of 10 %)
Resolution at reading	600 dpi × 400 dpi / 600 dpi × 600 dpi *
Print resolution	600 dpi × 400 dpi / 600 dpi × 600 dpi *
Warm-up time	10 sec. or less (when replacing the Toner Cartridge with a new
	one: 42 sec. or less)
First print time	Approx. 7.7 sec. or less (LTR, default setting)
First copy time	Approx. 12 sec. or less (LTR, default setting)
Print speed	19 ppm (LTR, initial setting)
	12 ppm (when output adjustment mode is used)
Copy speed	19 ppm (LTR)
Paper size	Fixed size:
	A4, B5, A5, LGL, LTR, Statement, Executive, Officio, B-officio,
	M-officio, Government-Letter, Government-Legal, Foolscap,
	A-foolscap, Envelope COM10, Envelope C5, Envelope B5,
	Envelope DL
	Custom size:
	Width: 76.2 to 216 mm, Length: 127 to 356 mm
Paper types	Plain paper (60 to 89 g/m2), Heavy paper (90 to 163 g/m2), Rough
	paper (60 to 163 g/m2), Transparency, Label, Envelope
Pickup Tray capacity	Approx. 150 sheets (plain paper: 60 to 80 g/m2)
Delivery Tray capacity	Approx. 100 sheets (plain paper: 60 to 80 g/m2)

1-3

Environment temperature range	10 to 30 degrees Centigrade
Environment humidity range	20 to 80 %
Duplex method	None
Host Interface	Standard: USB/Hi-speed USB, Options: None
Hard disk capacity	Standard: None, Options: None
Memory capacity	Standard: 64 MB, Options: None
Power supply	AC120 to 127V +/- 10 %, ( 50,60 Hz +/- 2 Hz)
	AC220 to 240V +/- 10 %, ( 50,60 Hz +/- 2 Hz)
Maximum power consumption	900	W or less (120 V), 960 W or less (230 V)
Power consumption	460	W or less (120 V), 450 W or less (230 V)
External dimensions (W x D xH)	372	× 276 × 254 mm
Weight	Approx. 8.2 kg (including Toner Cartridge)

T-1-2

*: Resolution switching

With this machine, 2 types of resolution can be switched by setting "Copy Type" on the printer driver.

Speed priority (at the time of shipment): 600 dpi × 400 dpi Resolution priority: 600 dpi × 600 dpi

1-3

1Product Overview > Specifications > Product Specifications

1 Product Overview > Parts Name > External View > Rear side of the machine		1-4
Parts Name		■■Rear side of the machine
External View		[1]
		[2]
■■Front side of the machine		[3]
[12]		[4]
	[1]
[13]
	[2]	[5]

	[11]
	[10]						[6]
					[8]
	[9]						[7]
	[8]		[3]
	[7]		[4]				F-1-2
				No.	Name	No.	Name
		[6]	[5]
				[1]	Copyboard Cover	[5]	Left Cover
			F-1-1
				[2]	Copyboard Glass	[6]	USB Device Port
No.	Name	No.	Name	[3]	Copyboard Upper Cover	[7] Power Supply Cord Slot
[1]	Control Panel Unit	[8]	Power Switch	[4]	Copyboard Lower Cover	[8]	Rear Cover
[2]	Upper Cover	[9]	Front Cover Unit
[3]	Right Cover	[10]	Delivery Auxiliary Tray
[4] Pickup Tray Paper Guides		[11]	Delivery Tray
[5]	Pickup Tray	[12]	Toner Cartridge Guide
[6] Pickup Tray Trailing Edge Paper Guides		[13]	Transfer Roller
[7] Small Size Paper Guides

1-4

1Product Overview > Parts Name > External View > Rear side of the machine

1	Product Overview > Parts Name > Control Panel	1-5
Cross Section View		Control Panel

[1]	[2]	[1]	[8]	[7]	[6]
[11]
[10]
[9]
[8]
[7]
[6]		[12]

[5]					[2]	[3]	[4]	[5]
[4]								F-1-4
[3]				No.	Name	Function
			F-1-3	[1]	Menu setting lamp (green)	Blinking: Menu is being set.
No.	Name	No.	Name		Menu setting key	Menu setting mode is entered.
[1]	Copyboard Glass	[7]	Photosensitive Drum			Pressing this key while menu is being set returns to one layer
						above.
[2]	CIS Unit	[8]	Fixing Film Unit
				[2] Density setting amp (green)		Blinking: Density is being set.
[3]	Separation Pad	[9]	Fixing Pressure Roller
						Lit: When changing from the initial value
[4]	Pickup Roller	[10]	Fixing Assembly
					Page aggregation setting lamp Blinking: Reduced layout/ID Card copy is being set.
[5]	Feed Roller	[11]	Delivery Roller
					(green)	Lit: When changing from the initial value
[6]	Transfer Roller	[12]	Laser Scanner Unit
					Enlargement/reduction setting	Blinking: Enlargement/reduction is being set.
					lamp (green)	Lit: When changing from the initial value
					Copy setting key	Copy setting items are switched by each press of this key.
				[3]	- (◄) key	The menu items are switched or the setting values are
					+ (►) key	increased/decreased in the menu setting mode. Also, the
						setting values of copy setting items are increased/decreased.
				[4]	Stop/reset key	The job is stopped.
						Pressing this key while menu is being set returns to one layer
						above.
				[5]	Start/OK key	Copy operation is started.
						In the menu setting mode, the menu items are selected or the
						setting values are determined.
				[6]	Jam occurrence lamp (orange) Blinking: At occurrence of a jam
						Lit: At occurrence of a service error
				[7] Out of paper lamp (orange)		Blinking: When paper on the Pickup Tray runs out
						Lit: At occurrence of a service error
				[8]	Indicator (green)	The setting values of copy setting items or the status of this
						product are displayed.
								T-1-3

1-5

1Product Overview > Parts Name > Control Panel

2Technical Overview■■Basic Configuration

■■Controller System

■■Original Exposure System

■■Laser Exposure System

■■Image Formation System

■■Fixing System

■■Pickup Feed System

■■External And Controls System

2Technical Overview

2 Technical Overview > Basic Configuration > Basic Sequence > Basic Sequence of Operation

2-2

Basic Configuration

Configuration function

The machine may be broadly divided into the following 7 functional blocks: engine control system,original exposure system, laser exposure system, image formation system, pickup feed system, fixing system, and external and control system.

	Original exposure system
	Laser exposure system
	Image formation system
Engine control
system	Pickup feed system

Fixing system

External and controls system

External device

F-2-1

Basic Sequence

■■Basic Sequence of Operation

The engine controller controls the operation sequence. The following table provides an outline of machine operation occurring from when the power switch is turned on to when printing ends and Main Motor (M1) stop, indicating the purposes of intervals and engine operation.

	Interval	Purpose	Remarks
WAIT	From power-ON until initial	To clear potential from the drum	Detect whether the
(Wait)	drive for Main Motor (M1) is	surface and to clean the transfer	Toner cartridge is
	completed.	roller.	installed or not.
		Also to bring the heater
		temperature up to the targeted
		temperature.
STBY	From the end of the WAIT	To keep the printer ready to
(Standby)	period or the LSTR period	print.
	until the print command is
	sent from the main controller.
	Or, from the end of the LSTR
	period until power switch is
	turned OFF.
INTR	From the input of the print	To stabilize the photosensitive
(initial	command from the main	drum sensitivity in preparation
rotation)	controller until the Pickup	for printing. Also to clean the
	Solenoid (SL1) is turned ON.	transfer roller.
PRINT	From the end of the INTR	To form image on the
(print)	period until the Paper	photosensitive drum based on
	Leading Edge Sensor	the VIDEO (/VDO, VDO) signals
	(PS751) detects the trailing	input from the main controller,
	edge of paper.	and to transfer the toner image
		onto paper.
LSTR	From the end of PRINT	To deliver the last paper	Return to the INTR
(last	period until the Main Motor	completely out of the printer.	period as soon as
rotation)	(M1) stops.		another print command
			is sent from the main
			controller.
			T-2-1

2-2

2Technical Overview > Basic Configuration > Basic Sequence > Basic Sequence of Operation

2 Technical Overview > Basic Configuration > Basic Sequence > Print Sequence

2-3

■■Print Sequence

Power-on

Start KEY

(Unit:Seconds)

WAIT

Sequence

STBY

INTR

PRINT

LSTR

STBY

1

Reader Motor (M3)

2

CIS Unit

3

Fixing heater

0.9

Controls at 80 C

0.1

Print temperature control

1.3

4

Relay

0.5

5

Print command

Print command

Waiting for

Print command

a print command

6

Scanner motor (M2)

1.1

0.3

7

Laser diode

BD emission/

0.1

Forcible emission

Masking emission

Masking emission

Masking emission

Forcible emission

Forcible emission

8

Main motor (M1)

0.1

Max.1.5

9

Pickup solenoid (SL1)

0.8

2.4

10 Leading edge sensor (PS751)

0.5

2.0

11

Fixing delivery sensor (PS701)

0.9

2.0

12 Primary charging bias (DC)

Max.4.1

1.1

0.5

13 Developing bias (AC)

0.06

0.06

14 Developing bias (DC)

15 Transfer bias

Cleaning bias

Cleaning bias

Print bias

Cleaning bias

F-2-2

2-3

2Technical Overview > Basic Configuration > Basic Sequence > Print Sequence

2 Technical Overview > Basic Configuration > Basic Sequence > Power-On Sequence

2-4

■■Power-On Sequence

The sequences from the power-ON to the STBY period are described below.

1)Power-ON.

2)CPU initialization.

3)Video interface communication start.

4)Residual paper check.

Detecting paper presence by each sensor signaling.

5)Initial drive for Main Motor (M1).

6)Initial drive for Fixing Heater (H1).

Controlling fixing temperature targeting for 120 deg C.

7)Initial drive of the Scanner Motor (M2).

8)High-voltage control.

Detect cartridge presence after primary charging AC bias is applied. Cleaning transfer roller.

9)Failure/Abnormality check.

Detecting fixing unit failure and door open during above periods.

2-4

2Technical Overview > Basic Configuration > Basic Sequence > Power-On Sequence

2Technical Overview > Controller System > Engine Controller > General description

Controller System

Main Controller

■■Overview

The Main Controller receives print information from the Reader and external equipment (computer, etc.). Video data is created from the received print information, and is sent to the Engine Controller.

There are 2 types of print information from the external equipment: engine command data to exchange the status or unique information of a printer and dot data for printing.

In the case of receiving dot data, video data is created and is sent to the Engine Controller. In the case of receiving engine command data, printer status is returned to the external equipment after communicating with the Engine Controller.

READER	ENGINE	CONTROL PANEL
	CONTROLLER
CONVERTER	ASIC	USB	EXTERNAL
ANALOG TO DIGITAL		INTERFACE	DEVICE
MOTOR DRIVER		CPU
DC/DC CONVERTER
	DRAM	EEPROM
MAIN CONTROLLER
			F-2-3

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Engine Controller

■■General description

Engine controller is the circuit to control the operation sequence of the host machine and it is controlled by the CPU inside the engine controller.

When the Power Switch (SW1100) is turned ON and DC power is supplied through the low voltage power inside engine controller, CPU starts the printer operation control.

Then, CPU drives the loads such as laser diode, motors and solenoids etc. according to the image data that is input by the main controller when status becomes stand-by mode.

The following is the block diagram of this circuit.

Engine controller

Fixing	M	Motor
	Fixing control
assembly
	Low-voltage	Solenoid
AC input
	power supply
	CPU
		Sensor
Transfer roller	High-voltage
Toner Cartridge	power supply
		Switch
Main controller	Laser scanner
		unit

F-2-4

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2Technical Overview > Controller System > Engine Controller > General description

2 Technical Overview > Controller System > Service Works > Notes on service works

2-6

Service Works

■■At parts replacement

No work is required for this product at parts replacement.

■■Maintenance

No periodically replaced parts, durable parts or periodical service is set for this product.

■■Notes on service works

None.

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2Technical Overview > Controller System > Service Works > Notes on service works

2Technical Overview > Original Exposure System > Major Components

Original Exposure System

Overview

item	function / method
document exposure	LED
document scan	Scan by the shift of the CIS Unit
scanning resolution	600 dpi x 400 dpi, 600 dpi x 600 dpi (Horizontal x Vertical)
number of gradations	256 gradations
magnification	50 % to 200 % (10 % increment)
	Horizontal: image processing by Main Controller PCB
	Vertical: change of carriage shift speed, image processing by Main
	Controller PCB
lens	CIS / Color
CIS Unit	number of lines: 1 line
	number of pixels: 5148 pixels as total pixels (5104 pixels as effective
	pixels)
	maximum document scanning width: 216 mm

CIS Unit drive control drive control by Reader motor (M3)

document size detection none

T-2-2

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Major Components

Followings are the major components for Document Exposure System.

•The CIS Unit to scan document

•The Reader motor, the drive pulley, the drive belt, to shift the CIS Unit

In image scanning control, the CIS Unit is shifted by rotating the Reader motor based on the drive signal from the Engine Controller PCB and scan the original on the copyboard glass.

Drive Belt

Drive Pulley

Reader Motor(M3)

Drive Pulley

CIS Unit

F-2-5

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2Technical Overview > Original Exposure System > Major Components

2 Technical Overview > Original Exposure System > Service Works > Notes on service works

2-8

Service Works

■■At parts replacement

No work is required for this product at parts replacement.

■■Maintenance

No periodically replaced parts, durable parts or periodical service is set for this product.

■■Notes on service works

None.

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2Technical Overview > Original Exposure System > Service Works > Notes on service works

2Technical Overview > Laser Exposure System > Overview > Overview

Laser Exposure System

Overview

■■Overview

The laser exposure system forms static latent images on the photosensitive drum according to the VIDEO signals sent from the main controller, and is comprised of the laser driver and scanner motor, etc. These are controlled by the engine controller. The following is the outline.

Photosensitive drum

BD sensor

Laser unit	Cylindrical lens

			Collimator						Focus lens
				lens
signalINPUTBD	signalVIDEO	CONTROLLASERsignal
					MOTORSCANNER CONTROLSPEEDsignal			Scanner Motor (M2)
						Four-faced mirror
				Engine Controller
				Main controller

F-2-6

2-9

The operational sequence of the laser scanner unit is described below.

1)When the Main controller sends print instruction command, the Engine controller rotates the Four-faced mirror, causing the Scanner Motor (M2) to rotate.

2)When the Scanner Motor (M2) starts to rotate, the Engine controller emits the laser forcibly using the Laser control signal, causing the Engine controller to start rotation control for the Scanner Motor (M2).

3)The Engine controller controls to keep a constant speed of rotation of the Scanner Motor (M2) using the Scanner motor speed control signal.

4)After the rotation speed of the Scanner motor reaches its target, the Main controller sends VIDEO signals to the Laser driver PCB.

5)The Laser driver emits laser diode according to these signals.

6)The laser beam passes through the collimator lens and the cylindrical lens and enters the Four-faced mirror rotating at a constant speed.

7)The laser beam reflected by the Four-faced mirror is focused on the Photosensitive drum via the image-forming lens at the front of the Four-faced mirror.

8)When the Four-faced mirror rotates at a constant speed, the laser beam on the Photosensitive drum is scanned on the Photosensitive drum at a constant speed.

9)When the Photosensitive drum rotates at a constant speed and the laser beam is scanned on the Photosensitive drum at a constant speed, latent images are formed on the Photosensitive drum.

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2Technical Overview > Laser Exposure System > Overview > Overview

2 Technical Overview > Laser Exposure System > Controlling the Laser Activation Timing > Horizontal Sync Control

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Controlling the Laser Activation Timing

■■Laser ON/OFF Control

In this control, the laser driver turns on/off the laser diode (LD) according to the laser control signal sent from the engine controller.

The following is the circuit diagram of the laser control.

The engine controller sends the laser control signals (CNT0, CNT1) for changing the operation mode of the laser to the logic circuit in the laser driver IC, as well as the video signals (VDO, /VDO) for image formation.

The laser driver IC executes laser control according to the combination of the CNT0, CNT1 signals.

The following is the combination of the laser control signal (CNT0, CNT1).

		Laser driver PCB			Operation mode	CNT0	CNT1	Remarks
	/BDI				Discharge	L	L	The capacitor (C1) is discharged.
			BD Sensor		Data output	H	H	At normal print
					APC	H	L	At using APC
	+3.3V
					Forced OFF	L	H	At using image mask
								T-2-3
					■■Horizontal Sync Control
		PD		LD	This is the control to adjust the writing position in the image horizontal direction.
					The following is the details of control procedure.
Engine					1)The engine controller controls the laser control signal during unblanking (*) to emit the laser
Controller
					diode (LD) forcibly.
	CNT1				2)The BD PCB exists on the scanning route of the laser beam, which is sent to the BD PCB.
	CNT0	Comparator			3)The BD PCB detects this laser beam, creates BD input signal (/BDI) and sends it to the
					engine controller.
					4)The engine controller creates horizontal sync signals (/BD) based on /BDI signal and sends
					the /BD signal to the main controller.
		Sample hold			5)When /BD signal is input, the main controller outputs the video signal (VDO, /VDO) to the
/BD	Logic PCB				engine controller to adjust the writing position in image horizontal direction.
			circuit
					*: Unblanking period
					The period during which the laser diode is emitted in non-image area.
					C1
Main	VOD
			Drive
Controller	/VOD
			circuit
	Laser driver IC
					F-2-7
2 Technical Overview > Laser Exposure System > Controlling the Laser Activation Timing > Horizontal Sync Control								2-10

2Technical Overview > Laser Exposure System > Laser Scanner Motor Control > Overview

Laser Control

■■Auto Power Control (APC)

This is the control to emit a constant level of laser diode.

There are two types of APC; initial APC (note 1), and line space APC (note 2). The laser driver executes the same procedure for both controls. The following is the details of the control procedure.

1)When the laser control signal enters APC mode (CNT0=H, CNT1=L), the laser driver emits LD in APC mode.

2)The emission level of LD is detected with photo diode (PD), converted from current output to voltage, and compared with the standard voltage (voltage equivalent to the target laser level).

3)The laser driver controls the laser current to achieve the voltage of LD target level.

4)When the laser control signal enters LD forced OFF mode, the LD is forcibly turned off. The laser driver saves the adjusted laser intensity to the capacitor (C1).

NOTE:

1.Initial APC

APC that is executed during initial rotation. APC adjusts laser intensity and detects faults in the laser.

2.Line space APC

APC that is executed during printing. Laser intensity for one line is adjusted before writing one line.

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Laser Scanner Motor Control

■■Overview

This is the control to rotate the Scanner Motor (M2) at a constant speed to emit the laser beam on the correct position on the photosensitive drum.

The following is the control circuit of the Scanner Motor (M2).

	Engine controller	Motor driver PCB	Laser scanner unit
		/BDI	BD PCB
CPU	ASIC
		+24VA		Scanner motor
			+24VA
				Scanner motor
		ACC		driver IC
				Drive
	Frequency		Integration
	comparator	DEC	circuit	circuit
	Reference
	clock
	Oscillator			M
X501
				F-2-8

The engine controller creates standard clock based on oscillation frequency of the oscillator (X501); the cycles of the standard clock is compared with that of BD input signal (/BDI) with a frequency comparator and the rotations of the Scanner Motor (M2) is monitored.

The engine controller sends the scanner motor acceleration signal (ACC) and scanner motor deceleration signal (DEC) to the scanner motor driver according to the detected rotation speed to control the rotation speed.

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2Technical Overview > Laser Exposure System > Laser Scanner Motor Control > Overview

2Technical Overview > Laser Exposure System > Service Works > Notes on service works

■■Scanner Motor Fault Detection

This is the detection of faults in the laser scanner unit.

When the laser scanner unit falls into either of the following status, the engine controller judges it as a fault in the laser scanner unit system and notices the status of fault to the main controller.

The operations of the host machine are stopped.

1.Fault in BD input

At startup of the scanner, /BDI signal cannot be detected within 0.1 sec from the completion of forced acceleration of the Scanner Motor (M2).

2.Fault in startup

During activating the Scanner Motor (M2) at startup of the scanner, the motor rotation exceeds the specified range (98.3 to 102.1%).

3.Fault in control

After startup of the scanner completes correctly, /BDI signal exceeds the specified value of cycle 10 consecutive times.

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Service Works

■■At parts replacement

No work is required for this product at parts replacement.

■■Maintenance

No periodically replaced parts, durable parts or periodical service is set for this product.

■■Notes on service works

None.

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2Technical Overview > Laser Exposure System > Service Works > Notes on service works

2Technical Overview > Image Formation System > Overview/Configuration > Print Process

Image Formation System

Overview/Configuration

■■Overview

The image formation system is the core of this equipment; it forms toner images on papers. The image formation system is comprised of the following components.

The engine controller controls the laser scanner unit and high-voltage power supply circuit and forms images based on the video signals on papers.

The following are the details of print process for this equipment and the functions of image formation.

Fixing assembly

Pressure roller

Fixing Film

Cartridge

Photosensitive drum

Transfer roller	Laser beam	Laser/scanner unit

To primary charging roller

To developing cylinder

TR	PRI	DEV	Engine controller
	High-voltage		CPU
	power supply

VIDEO signal

Main controller

F-2-9

2-13

■■Print Process

This explains the basic process of the operations that a printer executes for image formation. The print process of this equipment is divided largely into 5 blocks, 7 steps.

Toner images are formed on papers by executing the steps of each block in order. The following are the blocks of print process and the steps.

1.Static latent image formation block Step 1: Primary charging

Step 2: Laser beam exposure

2.Development block Step 3: Development

3.Transfer block Step 4: Transfer Step 5: Separation

4.Fixing block Step 6: Fixing

5.Drum cleaning block Step 7: Drum cleaning

	Electrostatic latent image formation block
Paper path			2. Laser beam exposure
Rotational direction of
the drum		1. Primary charging
			3. Development	Development
				block
Drum cleaning		7. Drum cleaning
Delivery block
	6. Fixing		5. Separation 4. Transfer	Pick-up
	Fixing block		Transfer block

F-2-10

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2Technical Overview > Image Formation System > Overview/Configuration > Print Process

2 Technical Overview > Image Formation System > Overview/Configuration > Development Block

2-14

■■Static Latent Image Formation Block

This block is comprised of two steps and forms static latent images on the photosensitive drum.

When the final step of this block completes, negative charge remains at dark areas on the drum surface where laser beam has not been exposed, and negative charge is eliminated from bright areas on the drum surface with laser beam exposed. The images on the drum with negative charge are called static latent images because human eyes cannot detect them.

0		Time (t)
Surface	Exposed area
potential	Unexposed area
(V)
Primary	Laser	Transfer	Primary
charging	beam	(step 4)	charging
(step 1)	exposure		(step 1)
	(step 2)

F-2-11

Step 2: Laser beam exposure

In this step, static latent images are formed on the photosensitive drum with laser beam. When laser beams are scanned on the photosensitive drum negatively charged, bright areas lose their charges, eliminating negative potential on the surface of the photosensitive drum; on those portions, static latent images are formed.

	Laser beam
Unexposed	Exposed
area	area
■■Development Block	F-2-13

This block is comprised of one step; it puts toners to the static latent images on the surface of the photosensitive drum and visualizes the images using toner projection development. The toner projection development makes the toner jump on the surface of the photosensitive drum and develops the images.

The toner (developer) used for this equipment is a one-component toner that comprises magnetic body and resin, etc.

Step 1: Primary charging

For preparation of latent image formation, the surface of photosensitive drum is charged with even negative potential. In this primary charging, the charge is applied from the primary charging roller directly to the photosensitive drum.

DC bias is applied to the primary charging roller to maintain an even potential on the surface of the photosensitive drum.

Primary charging roller

Photosensitive drum

DC bias

F-2-12

Step 3: Development

Toner is affixed to static latent images on the surface of the photosensitive drum.

The toner is charged negatively by friction between the developing cylinder and the surface of the developing blade.

An area on the photosensitive drum exposed with laser beam has higher potential than the developing cylinder; the potential difference between the drum surface and the cylinder enables the toner to jump on the drum surface and makes them visible images.

AC bias superimposed with the development DC negative bias is applied to the developing cylinder.

Blade	Developing cylinder
Exposed area	Unexposed area	AC bias
	Exposed area
Unexposed
area		DC bias

Photosensitive drum

F-2-14

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2Technical Overview > Image Formation System > Overview/Configuration > Development Block

F-2-15

2 Technical Overview > Image Formation System > Overview/Configuration > Drum Cleaning Block

2-15

■■Transfer Block

This block is comprised of two steps; it transfers toner images on the surface of the photosensitive drum to papers.

Step 4: Transfer

In this step, toner images on the photosensitive drum are transferred to papers.

This equipment applies DC positive bias to the transfer roller facing the photosensitive drum and charges papers positively. This enables toner negatively charged on the surface of the photosensitive drum to be transferred to papers.

Photosensitive

drum

Media

Transfer roller

DC bias

Step 5: Separation

In this step, DC negative bias is applied to the static eliminator according to the elasticity of papers to separate the papers from the photosensitive drum. The static eliminator is used to stabilize the paper feed system (prevention of toner stray that appears as polka-dots on print images in a low-temperature, low-humidity environment), and neutralizes the electric charge at the back of papers.

Photosensitive

drum

Media

Static charge eliminator	Transfer roller

F-2-16

■■Fixing Block

This block applies pressure and heat to papers and the toner on them to fix toner images to the papers.

Step 6: Fixing

This step employs on-demand fixing that fixes toner images transferred to papers on the papers.

Fixing heater

Fixing film

Toner

Media

Pressure roller

F-2-17

■■Drum Cleaning Block

The drum cleaning block removes the toner remained on the photosensitive drum.

Step 7: Drum cleaning

In this step, toner remained on the photosensitive drum is removed.

The cleaning blade scrapes the leftover toner on the surface of the photosensitive drum; the toner is collected into the cleaner container.

By implementing the above step, the surface of the photosensitive drum is cleaned.

Cleaning blade

	Photosensitive
Cleaner container	drum

F-2-18

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2Technical Overview > Image Formation System > Overview/Configuration > Drum Cleaning Block