Canon iR2200, iR2800, iR3300 Service Manual

New Product Information

iR2200/2800/3300

Date : January 25, 2001 File No. : C-17-01-001

Confidential

Released by : Canon Inc.

OIP QA Center OIP TS Division

This document precedes the Service Manual for the product in question and serves as a reference, thereby providing the Sales Companies with a good understanding of the product in advance.

Most of the contents of this document are not official and, therefore, are subject to change before the product is brought into being, making it important to bear in mind that the descriptions are true only as of the date indicated on the cover.

Yoshiaki Takase, General Manager

OIP QA Division

(TS001102)

New Product Information

Introduction to New Product Information

The document “New Product Information” replaces the Trainer’s Manual (TR) most of you are familiar with, and is the result of our efforts to provide information useful to all departments concerned in each Sales Company.

The Service Manual for the product will have descriptions updated to reflect the changes that may have occurred. Kindly make arrangements so that this document is properly disposed of as soon as the Service Manual is released.

January,25, 2001

Canon Inc.

OIP QA Center

OIP QA Division

CHAPTER 1

GENERAL DESCRIPTION

2001 CANON INC. 2000 2000 2000 2000 CANON iR3300/2800/2200 REV.0 JAN. 2001

CHAPTER 1 GENERAL DESCRIPTION

1 Specifications

1.1 Main Body

1.1.1 Type

Item Description Body Desktop Copyboard Fixed Light source Xenon lamp Lens Lens array Photosensitive medium OPC drum (30-mm dia.)

T01-101-01

1.1.2 Systems

Item Description Reproduction Indirect electrostatic Charging AC roller Exposure Laser Copy density adjustment Auto or manual Development Single-component toner projection Pickup Auto Front cassette (2 cassettes)

Retard method (about 500 sheets of 80 g/m2 paper, about 550 sheets of 64 g/m2 paper)

Manual Multifeeder

Dual process method (about 50 sheets of 80 g/m2 paper) Transfer Roller Separation Static eliminator (static separation) + curvature Cleaning Blade Fixing SURF method (plane heater and fixing film)

T01-101-02

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1-1

CHAPTER 1 GENERAL DESCRIPTION

1.1.3 Functions

Item Description Resolution Reading 600dpi×600dpi

Copying 1200dpi×600dpi

Printer output 2400dpi×600dpi Original type Sheet, book 3-D object (2 kg max.) Maximum original size A3/279.4×431.8mm (11"×17") Reproduction ratio Direct (1:1), Reduce I (1:0.250), Reduce II (1:0.500),

Reduce III (1:0.611), Reduce IV (1:0.707), Reduce III (1:1.414), Enlarge IV (1:2.000), Enlarge V (1:4.000), Enlarge VI (1:8.000),

Zoom (1:0.250 to 8.000 in 1% increments) Wait time 10 sec or less (at 20°C) First copy time 5.4 sec (book mode, cassette 1, Direct, A4/LTR, text mode) Continuous copying 999 copies max. Copy size

Cassette A/B A3 max., A5 (vertical feed) min.

Inch 279.4×431.8 mm (11"×17") max., STMT (vertical feed) min.

Manual feed AB A3 max., postcard (vertical feed) min.

Inch 279.4×431.8 mm (11"×17") max., STMT (vertical feed) min.

Cassette 1/2 • Plain paper (64 to 80 g/m2):A3, B4, A4, B5, A5R, A4R, B5R,

279.4×431.8mm (11"×17"), LGL, LTR, LTRR, STMT, STMTR

• Tracing paper (SM-1):A3, B4, A4, B5, A4R, B5R

• Colored paper (Canon-recommended):B4, A4, A4R

Multifeeder • Plain paper (64 to 80 g/m2):A3, B4, A4, B5, A5R, A4R, B5R,

279.4×431.8mm (11"×17"), LGL, LTR, LTRR, STMT, STMTR

• Tracing paper (SM-1, GSN-75):A3, B4, A4, B5, A4R, B5R

• Transparency (Canon-recommended):A4, A4R, LTR, LTRR

• Colored paper (Canon-recommended):B4, A4, A4R

• Postcard: Jpn (vertical feed), double-card, 4-sheet card

• Label sheet (Canon-recommended):B4, A4, A4R, LTR, LTRR

• Thick paper (90 to 128 g/m2):A3, B4, A4, B5, A4R, B5R, LTR, LTRR

• Envelope

T01-101-03

1-2

2001 CANON INC. 2000 2000 2000 2000 CANON iR3300/2800/2200 REV.0 JAN. 2001

CHAPTER 1 GENERAL DESCRIPTION

Item Description Single-sided copying mode • Plain paper (64 to 80 g/m2):A3, B4, A4, B5, A5R, A4R, B5R,

279.4×431.5mm (11"×17"), LGL, LTR, LTRR, STMT, STMTR

• Tracing paper (SM-1, GSN-75):A3, B4, A4, B5, A4R, B5R

• Transparency (Canon-recommended)A4, A4R, LTR, LTRR

• Colored paper (Canon-recommended):B4, A4, A4R

• Postcard: Jpn postcard (vertical feed), double-card, 4-sheet card

• Label sheet (Canon-recommended):B4, A4, A4R, LTR, LTRR

• Thick paper (90 to 128 g/m2):A3, B4, A4, B5, A4R, B5R, LTR, LTRR

• Envelope

Double-sided copying mode (automatic)

• Plain paper (64 to 80 g/m2):A3, B4, A4, B5, A5R, A4R, B5R,

279.4×431.8mm (11"×17"), LGL, LTR, LTRR, STMT, STMTR

• Colored paper (Canon-recommended):B4, A4, A4R

• Thick paper (90 to 128 g/m2):A3, B4, A4, B5, A4R, B5R, LTR, LTRR

Double-sided copying mode (multifeeder)

• Plain paper (64 to 80 g/m2):A3, B4, A4, B5, A5R, A4R, B5R,

279.4×431.8mm (11"×17"), LGL, LTR, LTRR, STMT, STMTR

• Colored paper (Canon-recommended):B4, A4, A4R

• Postcard: Jpn (vertical feed), double-card, 4-sheet card

• Thick paper (90 to 128 g/m2):A3, B4, A4, B5, A4R, B5R, LTR, LTRR

T01-101-04

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1-3

CHAPTER 1 GENERAL DESCRIPTION

Item Description Cassette Claw None

Capacity 55 mm deep (approx.; about 500 sheets of 80 g/m2 paper) Hard disk 6.4GB (*1) Non-image width Leading edge Direct, Enlarge/Reduce:4.0±1.5/-1.0mm <4.5±1.8mm>*2

Trailing edge Direct, Enlarge/Reduce:2.0±1.5mm <2.0±1.8mm>*2 Left/right (1st side) Direct, Enlarge/Reduce:2.5±1.5mm <2.5±2.0mm>*2

Auto clear Yes (2 min standard; may be changed in 1-min increments

between 0 and 9 min) Auto power-off Yes Low-power mode Yes (15 min standard; may be changed in user mode to

10, 15, 20, 30, 40, 50, 60, 90 min, 2, 3, or 4 hr) Sleep mode Yes (60 min standard; may be changed in user mode to

10, 15, 20, 30, 40, 50, 60, 90 min, 2, 3, or 4 hr)

Yes (-10% standard; may be changed in user mode to -

10%, -25%, -50%, or no return (0%)) Accessory • DADF-H1

• Copyboard Cover Type-E

• Copyboard-D1

• Copy Tray-F1

• Saddle Finisher-G1

• Puncher Unit-G1

• Finisher-J1

• Inner 2-Way Tray-A1

• Side Paper Deck-L1

• 2-cassette Pedestal-W1

• Options Power Supply-B1 (required for SF, PD)

• Cassette Heater Kit-16N

• Control Card-IV

• Network LIPS Printer Kit-A1 (100V model only)

• Network Multi-PDL Printer Kit-A1 (120/230V model only)

*1:The HDD that comes with the machine and the HDD that is made available as a service part may

have different memory sizes; however, the area of the HDD used by the machine will be the same, and either may be used without a problem.

*2:The values within parentheses indicate when the DADF is used.

T01-101-05

The above specifications are subject to change for product improvement.

1-4

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CHAPTER 1 GENERAL DESCRIPTION

1.1.4 Others

Item Description Operating environment Temperature range 15° to 30°C

Humidity range 5 to 80% Atmospheric pressure 810.6 to 1013.3 hpa (0.8 to 1.0 atm)

Power supply E201

LQHxxxxx

100V (50/60Hz) LQJxxxxx

NRFxxxxx

120V (50/60Hz) NRGxxxxx

PKMxxxxx 220V/60Hz PKKxxxxx 230V (50/60Hz) PKLxxxxx

QCWxxxxx

RBZxxxxx

SCKxxxxx

TBZxxxxx

UFMxxxxx Power consumption Maximum E201: 1.5 kW or less

Standby E201: 282 W (approx.; reference only) Continuous E201: 995 W (approx.; reference only)

Noise Sound power level (Impulse mode)

Copying E201: 66 dB or less, E202: 71 dB or less

Standby E201: 40 dB or less, E202: 50 dB or less Ozone 0.01 ppm or less avg., 0.02 ppm or less max. Dimensions (mm) (iP-Lite) 565 (W) × 678 (D) × 1020 (H)

(iP-Std) 565 (W) × 678 (D) × 1040 (H)

Weight 80 kg (approx.) Consumables Copy paper Keep wrapped to protect against humidity. Toner Keep away from direct sunshine, and keep at

40°C/85% or less.

T01-101-06

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1-5

CHAPTER 1 GENERAL DESCRIPTION

Reproduction mode Side Paper size copies /min (1-to-N)

E201 E202

Direct A3 (297×420mm) A3 - 16

A4 (210×297mm) A5 - A5 (149×210mm) A4 22 33 B4 (257×364mm) B4 - 14 B5 (182×257mm) B5 - 28 A4R (297×210mm) A4R - B5R (257×182mm) B5R - A5R (210×149mm) A5R - -

Reduce II

(50.0%) A3 → A5R A5R - III (61.1%) A3 → B5R B5R - IV (70.7%) B4 → B5R B5R - V A3 → A4R A4R - (81.6%) B4 → A4R A4R - VI B5R → A5R A5R - (86.5%) A4 → B5 B5 - -

A3 → B4 B4 - -

Enlarge IV

(200.0%) A5R → A3 A3 - III (141.4%) A4R → A3 A3 - II B5R → B4 B4 - (122.4%) A4R → B4 B4 - I A5 → B5 B5 - (115.4%) B4 → A3 A3 - -

B5 → A4 A4 - -

Delivery by copier, Auto paper select ON, Auto density, Non-sort, Deck/Cassette

T01-101-07 Copying Speeds (copier only)

1-6

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CHAPTER 1 GENERAL DESCRIPTION

Reproduction mode Size (1toN)

E201 E202

Direct 279.4×431.8mm 279.4×431.8mm - 16

(11"×17") (11"×17")

LTR LTR 22 33

LGL LGL - 14

LTRR LTRR - -

STMTR STMTR - -

Reduce II 279.4×431.8mm STMTR - -

(50.0%) (11"×17") → STMTR III 279.4×431.8mm LTRR - (64.7%) (11"×17") → LTRR IV 279.4×431.8mm LGL - (73.3%) (11"×17") → LGL V LGL → LT RR L TRR - (78.6%)

Enlarge IV STMTR* → 279.4×431.8mm - -

(200.0%) 279.4×431.8mm (11"×17")

(11"×17")

III LTRR → 279.4×431.8mm - (129.4%) 279.4×431.8mm (11"×17")

(11"×17")

II LGL → 279.4×431.8mm - (121.4%) 279.4×431.8mm (11"×17")

(11"×17") copies/min

Paper size

*STMTR cannot be used as an original. Delivery by copier, Auto paper select ON, Auto density, Non-sort, Deck/Cassette

T01-101-08 Copying Speeds (copier only)

The above specifications are subject to change for product improvement.

2001 CANON INC. 2000 2000 2000 2000 CANON iR3300/2800/2200 REV.0 JAN. 2001

1-7

CHAPTER 1 GENERAL DESCRIPTION

1.2 Side Paper Deck-L1

Item Description Pickup method Retard Paper accommodation Front loading Paper type (horizontal feed only) Plain paper (65 to 80 g/m2): A4, B5, LT R

Colored paper (Canon-recommended): A4 Capacity 2,500 sheets (approx.; 80 g/m2 paper) Serial number A4 type:XCQxxxxx LTR type: XCRxxxxx Paper size switch By size guide plate/in service mode Dimensions 324 (W) × 591 (D) × 432 (H) mm Weight 30 kg (approx.) Power supply None (DC power supplied by accessories power supply of

host machine) Operating conditions Same as host machine

T01-200-01

The above specifications are subject to change for product improvement.

1-8

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2 Names of Parts

2.1 External View

CHAPTER 1 GENERAL DESCRIPTION

[4]

[5]

[1] ADF [2] Original tray [3] Control panel [4] Front cover [5] Cassette 1 [6] Cassette 2 [7] Delivery tray [8] Multifeeder

[6]

[3]

[1]

[2]

[7]

[8]

[9]

[9] Right lower cover [10] DIMM ROM replacement cover [11] Network card slot [12] Parallel connector [13] Extension board slot [14] Main power switch [15] Cassette heater switch

F01-201-01 External View 1

2001 CANON INC. 2000 2000 2000 2000 CANON iR3300/2800/2200 REV.0 JAN. 2001

1-9

CHAPTER 1 GENERAL DESCRIPTION

[1]

[2]

[3]

[4]

[6]

[1] Copyboard glass [2] DADF reading glass [3] Left cover [4] Left lower rear cover (waste toner

case cover)

F01-201-02 External View 2

[5]

[7]

[5] Developing assembly releasing

lever [6] Feeding assembly releasing lever [7] Duplex feeding assembly releas-

ing lever

1-10

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2.2 Cross Section

CHAPTER 1 GENERAL DESCRIPTION

F01-202-01 Cross Section

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1-11

CHAPTER 1 GENERAL DESCRIPTION

[1] DADF reading glass [2] No. 1 mirror [3] Scanning lamp [4] Copyboard glass [5] Fixing assembly [6] Feeding assembly [7] Laser mirror 3 [8] Laser mirror 2 [9] Laser mirror 1 [10] Drum cleaner assembly [11] Primary charging assembly [12] Photosensitive drum [13] Laser mirror 4 [14] CCD unit [15] Laser unit [16] Dust-proofing glass [17] Developing cylinder [18] Pre-transfer charging assembly [19] Multifeeder pickup roller

[20] Multifeeder separation roller [21] Registration roller [22] Transfer roller [23] Static eliminator [24] Cassette 1 pickup roller [25] Cassette 1 feeding roller [26] Cassette 1 separation roller [27] Cassette 2 pickup roller [28] Cassette 2 feeding roller [29] Cassette 2 separation roller [30] Cassette 1 [31] Cassette 2 [32] Lower fixing roller [33] Inside delivery roller [34] Outside delivery roller [35] Upper fixing roller [36] No. 3 mirror [37] No. 2 mirror

T01-202-01

1-12

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CHAPTER 1 GENERAL DESCRIPTION

3. System Configuration

3.1 Functional Construction

The machine may be broadly divided into the following six functional blocks:

Various

networks or public

Original

telephone

network

Optical path

CCD PCB

Reader controller

DC controller

PCB

DC power

supply PCB

Delivery

tray

Original

illumination

Original Exposure Block

PCB

Control Block

Charging

Cleaning

Feeding

Fixing

Photo-

sensitive

drum

Separation

Lower feeding assembly

Cassette 1

Cassette 2

Control

panel

Main controller PCB

Image Processing Block

Laser driver PCB

Laser scanner

Development

Image Formation Block

Pickup

Transfer

control

Pickup/Feeding Block

Various

accessory

boards

Exposure Block

Laser

Multi-

feeder

HDD

Side paper

deck

(accessory)

F01-301-01

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1-13

CHAPTER 1 GENERAL DESCRIPTION

3.2 Outline of the Electrical Circuitry

3.2.1 Construction of the Electrical Circuit

The major electrical mechanisms of the machine are controlled by the following PCBs: [1] Man controller PCB; controls the system as a whole, processes images [2] DC controller PCB; controls the printer unit, controls the finisher communication [3] Reader controller PCB; controls the reader unit, controls the DADF communication

IC5025

boards

Accessory

drive

(HDD)

Hard disk

(CPU)

IC1010

(DIMM-

Control

(ROM)

IC5008

IC5016

(CPU)

ROM)

panel

PCB

IC5009

Main controller PCB

(RAM)

CCD

(RAM)

IC5027

IC125

(CPU)

IC104,105

DIMM/

IC121

IC120

unication 2)

(IPC comm-

PCB

(EEPROM)

IC109,110

ROM

IC122

ADF

IC5021

(IPC comm-

IC127,130

(EEPROM)

(IC117)

(RAM)

DC controller PCB

unication 2)

Reader

controller PCB

Main

power

supply

power

supply

Composite

PCB

Drum

sensor

power

supply

Accessories

PCB

drive

Laser

PCB

LA2

PCB

Inverter

PCB

motor

Scanner

1-14

(CPU)

IC6501

PCB

• Finisher

(accessory)

DC loads

• Clutch

• Solenoid

• Motor

• Sensor

• Fan

• Etc.

Pickup

F01-302-01

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CHAPTER 1 GENERAL DESCRIPTION

3.3 Inputs to and Outputs from the Major PCBs

3.3.1 Wiring Diagram of the Major PCBs

Potential

control

PCB

Duplex

driver

J2302

PCB

Laser scanner motor

M15

J2511

Laser drive

PCB

J2501

BD PCB

DC power

supply PCB

J2701

J4003

HVT PCB

J4502

Environment sensor PCB

Cassette 3 paper level

detection

Cassette 4 paper level

detection

AC driver

PCB

Motor driver

PCB

J806

J810

J2052

J2101

J2108

J8492

J103

J107

J116

J121

J120

J101

J102

J113

J102

J104

J105

controller

PCB

LCD panel

(LCD)

Inverter

PCB

Hard disk

Control

Card-IV

(accessory)

Copy Data

Controller

(accessory)

J956

J1551

J1532

J1530

J6503

J6507

J6506

J6505 J1012

J1015J122

J1017

J1060

J1022

Control

panel

CPU PCB

Controller

assembly

CCD/AP

PCB

Scanner motor

Inverter

PCB

J6604

J6509

J6504

J6501

J6508

J6801 J1018

J1014

J6002

J5101

J6502

J6601

J6602

J6603

J6605

J5004

J5003

J5011

J5007

Keypad

PCB

Reader

controller

PCB

Note: The in the diagram indicates connection between PCBs, NOT the flow of signals.

F01-303-01

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1-15

CHAPTER 1 GENERAL DESCRIPTION

3.4 Configuration with Accessories

3.4.1 Accessories for Original/Paper Feeding

[5]

[4]

[6]

[1]

[2]

[10]

[3]

[7]

[8]

[9]

[1] DADF-H1 [2] Copyboard Cover Type-E [3] Copyboard-D1 [4] Copy Tray-F1 [5] Saddle Finisher-G1 [6] Puncher Unit-E1

1-16

[7] Finisher-J1 [8] Inner 2-Way Tray-A1 [9] Side Paper Deck-L1 [10] 2-Cassette Pedestal-W1 [11] Options Power supply-N1

(required when [5] or [9] is used)

F01-304-01

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3.4.2 Accessory Boards

CHAPTER 1 GENERAL DESCRIPTION

LIPS Printer Kit-B1

LPS

PCB

Network Multi-PDL Printer Kit-B1

RIP1 PCB

Relay PCB

Relay

PCB

Relay

PCB

Network

PCB

Relay

PCB

Super G3 FAX

Board-J1

Token Ring

TokenRing

PCB

Network

PCB

Network

PCB

Ethernet

network

TokenRing

network

Public

telephone

network

Multiport Kit-B1

G4 FAX Board-B1

F01-304-02

2001 CANON INC. 2000 2000 2000 2000 CANON iR3300/2800/2200 REV.0 JAN. 2001

ISDN network

1-17

CHAPTER 2

ORIGINAL EXPOSURE SYSTEM

2001 CANON INC. 2000 2000 2000 2000 CANON iR3300/2800/2200 REV.0 JAN. 2001

CHAPTER 2 ORIGINAL EXPOSURE SYSTEM

1. Outline of Operations

1.1 Outline

The original exposure system has the following major functions:

Item Description Original illumination Xenon tube Original scanning In Book mode: by moving scanner

With ADF in use: by fixed No. 1 mirror base at stream reading po-

sition scanner position detection Scanner HP sensor (PS400) Reproduction ratio (zoom) [1] Copyboard Mode (25% to 800%)

Main scanning direction: image processing by controller assembly Sub scanning direction: for a ratio of 50% or higher, changing

scanning speed of No. 1 mirror; for a ratio of lower than 50% and 400% or higher, chaining scanning speed and im-

age processing [2] ADF Mode (25% to 400%) Main scanning direction: image processing by controller assembly Sub scanning direction: for a ratio of 50% or higher, changing

original feeding speed; for a ratio of

lower than 50% and 200% or higher,

Scanner drive control No. 1/No. 2 mirror base: control by stepping motor (M400) Lens Lens array, fixed type Scanning lamp control [1] Control of activation by inverter circuit

[2] Control for error detection

Original size detection [1] In Book Mode

Sub scanning direction: by reflection type sensor Main scanning direction: by CCD [2] With ADF in Use By ADF

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2-1

CHAPTER 2 ORIGINAL EXPOSURE SYSTEM

1.2 Changing the Reproduction Ratio (Zoom)

[1] In Copyboard Mode

If for a reproduction ratio of 25% to 800%, the speed of the scanner is changed.

[2] With ADF in Use

If for a reproduction ratio of 25% to 400%, the speed of the movement of the original is changed.

1.2.1 Changing the Reproduction Ratio in Main Scanning Direction

For scanning direction, reading is always at 100% in both copyboard and ADF modes; the

ratio is changed in the course of data processing in the main controller assembly.

To reduce, data units are skipped. To enlarge, data units are repeated.

1.2.2 Changing the Reproduction Ratio in Sub Scanning Direction

For sub scanning direction, the speed of the scanner/movement of the original is changed. However, for a reduction between 25% and 49% and enlargement between 401% and 800%, data processing in the main controller assembly is also used in combination. [1] For enlargement, the speed of the mirror/original is reduced from that used in Direct:

e.g., at 200%, the speed is 1/2 of the speed used in Direct.

[2] For reduction between 50% and 99%, the speed of the mirror/original is increased;

e.g., at 50%, the speed is twice as high as that used in Direct.

(speed ratio)

1/2 1/4

50%

(reproduction ratio)

400%200%100%

F02-102-01

[3] For a reduction between 25% and 49%, image data read at 50% to 98% is subjected to

skipping (1/2) in the main controller assembly.

[4] For an enlargement between 401% and 800%, image data read at 200% to 400% is sub-

jected to repeating (doubling) in the main controller assembly.

2-2

2001 CANON INC. 2000 2000 2000 2000 CANON iR3300/2800/2200 REV.0 JAN. 2001

CHAPTER 3

LASER EXPOSURE SYSTEM

2001 CANON INC. 2000 2000 2000 2000 CANON iR3300/2800/2200 REV.0 JAN. 2001

CHAPTER 3 LASER EXPOSURE SYSTEM

1 Outline of Operations

1.1 Outline

Part 2>Chapter 4>1.1 “Outline of Laser Exposure”

The reader controller PCB serves to read image signals from the CCD and send image signals to the main controller assembly. The video signals from the main controller assembly are converted by the DC controller PCB into laser drive signals, and are turned into laser intensity signals to suit signal levels by the laser driver PCB.

The laser intensity signals are used to cause the laser unit to generate a laser beam, which is directed to the photosensitive drum for the formation of latent static images.

The laser beam is also used for blank exposure to create non-image areas.

Item Description

Laser intensity control Laser power auto control (APC control) Laser scanning By semiconductor laser Synchronization control Main scanning direction: control by BD signal

Sub scanning direction: control by image leading edge signal

Laser scanner motor control Constant speed rotation control

T03-101-01

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3-1

CHAPTER 3 LASER EXPOSURE SYSTEM

F03-101-01 shows the major components for the laser exposure system; the machine’s la-

ser scanning is performed by means of a 6-facet polygon mirror and a single-beam laser unit:

Laser unit

BD mirror

Photosensitive drum

Cylindrical lens

Polygon mirror (6-faceted)

Laser scanner motor

Collimating lens

BD PCB

Laser mirror

F03-101-01 External View

Component Description

Laser semiconductor Visible laser light (about 6760 nm), single-beam Laser scanner motor (M10) DC brush-less motor, constant speed control Polygon mirror 6-faceted BD mirror/BD PCB Laser beam detection Laser driver PCB Laser activation control DC controller PCB Laser scanner motor rotation control

3-2

T03-101-02 List of Components

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CHAPTER 3 LASER EXPOSURE SYSTEM

1.2 Sequence of Operations (laser exposure system)

Main power switch ON/sleep mode OFF

Original set/ADF opened

180˚C

Start key ON

Laser scanner motor

Image leading edge signal

Laser

BD signal

AINTR

8 sec

*: If silent mode (in user mode) is selected, the motor stops after a

specific period of time.

STBY

INTR

LSTR

F03-102-01 Basic Sequence of Operations

STBY

2001 CANON INC. 2000 2000 2000 2000 CANON iR3300/2800/2200 REV.0 JAN. 2001

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CHAPTER 3 LASER EXPOSURE SYSTEM

2 Generating Sync Signals

2.1 Outline

Part 2>Chapter 4>2 “Generating BD Signals”

The BD signal used to synchronize the video signals in laser scanning direction is generated by the BD PCB with reference to the laser beam reflected by the BD mirror mounted in the path of the laser beam.

The edge of paper re-picked in double-sided mode is detected by the horizontal registration sensor to measure the displacement to the rear/front. Based on the measurement, the timing of laser activation is changed with reference to the BD signal so that the image will be placed at a specific position on the paper without fail.

Laser unit

Polygon mirror (6-faceted)

BD mirror

3-4

Photosensitive drum

F03-201-01 Construction of the Control System

2001 CANON INC. 2000 2000 2000 2000 CANON iR3300/2800/2200 REV.0 JAN. 2001

BD PCB

CHAPTER 3 LASER EXPOSURE SYSTEM

2.2 Flow of Sync signals

[1] The BD signal goes ‘0’ when laser light is detected. [2] The phase is matched with the phase of the printer, and a sync signal is generated. [3] Based on the printer sync signal, image data is read from the image memory. [4] Video signal [5] The 2-pixel parallel signal is converted into a single-pixel serial signal. [6] The laser drive signal is used to drive the laser unit to suit the video signal.

J3129 J312

GND

BD PCB

Laser driver

PCB

4 3 2 1

J500

GND

[6]

[1]

J307

B11 B12 B13

B14

Sync signal

generation

[2]

Parallel/

serial

conversion

[5]

A18

J122

[3]

[4]

J1015

A18

Memory

control

J1015

DC controller

PCB

Controller assembly

F03-202-01 Flow of Signals

E100 Indicates that the BD signal cannot be detected within a specific period of time after the laser has been turned on.

2001 CANON INC. 2000 2000 2000 2000 CANON iR3300/2800/2200 REV.0 JAN. 2001

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CHAPTER 3 LASER EXPOSURE SYSTEM

3 Laser Driver Circuit

3.1 Controlling the Laser Unit

The laser driver circuit is used to drive the semiconductor laser according to the laser drive signal from the DC controller PCB.

The laser driver circuit performs the following:

1. Turning on/off the laser.

2. Controlling the light intensity of the laser (APC control).

The signals have the following meanings and functions: [1] Laser drive signal; used to drive the semiconductor laser. [2] Sample laser activation signal; used to turn on the laser for intensity sampling (the result

is used for activation for imaging). [3] Laser enable signal; goes ‘0’ when the laser is ready after the Start key is pressed. [4] Image leading edge signal; used to start laser writing when paper reaches the image

leading edge sensor (PSS12) mounted in front of the photosensitive drum. [5] Used to monitor the laser intensity when the laser is turned on for sampling, and feeds

back the level appropriate to the intensity to the laser driver circuit. [6] Used to control the output so that the feedback level and the reference level from the DC

controller will be identical. [7] Laser intensity reference signal; used as the laser activation reference level determined

by the DC controller. [8] Horizontal registration paper detection signal; used to adjust the image position by

changing the timing of laser activation with reference to the result of detection of the

edge of paper re-picked in double-sided mode by the horizontal registration sensor

(PS11).

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2001 CANON INC. 2000 2000 2000 2000 CANON iR3300/2800/2200 REV.0 JAN. 2001

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