Nov 15 2004

General Timing Chart / GeneralCircuit Diagram

iR4570/3570, 2870/2270 Series

IMPORTANT

　This documentation is published by Canon Inc., Japan, to serve as a source of reference for work in the field.

　Specifications and other information contained herein may vary slightly from actual machine values or those foundin advertising and other printed matter.Any questions regarding the information contained herein should be directed to the Copier Service Department of theSales Company.

　This documentation is intended for all sales areas, and may contain information not applicable to certain areas.

　Reproduction without permission not allowed.Use of this manual should be strictly supervised to avoid disclosure of confidential information.

COPYRIGHT 2001 CANON INC.

Printed in Japan

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

Contents

1 General Circuit Diagram .......................................................................................................................................... 1General Circuit Diagram ......................................................................................................................................... 1

1

1 General Circuit DiagramGeneral Circuit DiagramGeneral Circuit Diagram 1 (Printer)iR2270 / iR2870 / iR3570 / iR4570

F-1-1

A

4 3 2

C

B

D

E

F

A

C

B

D

E

F

7 6 5 1

4 3 27

7

7 6 5 1

(1/11)F14-5418-A501

Fixing Unit AC Cable Fixing Unit AC Cable

Fixing Unit AC Cable

Door Switch

Flat Cable

Main Controller PCB 2/4

SW2

Power Supply Cable

Cassette Heater

Main Power SwitchSW1

SW

5

PC

B12

Environm

entS

witch P

CB

PLG1 ELCB1(100V)ELCB2(230V)

H4

Printer Power Supply PCB All-Night Power Supply PCBPCB1

AC Driver PCBPCB6

DC Controller PCB 1/4

Controller Power Supply PCB

PC

B17

TH1

H1

H2

TH2 PS13 PS8

M3

PCB8

Environm

entH

eater Sw

itch

TP

1T

hermo S

witch

TP

39T

hermo S

witch

Accessory P

ower S

upply PC

B

Fixing M

ain Heater

H1

Fixing M

ain Heater

Fixing S

ub Heater

H2

Fixing S

ub Heater

Fixing Exit Sensor

Fixing Motor

Fixing Film Speed Sensor

Fixing Main Thermistor

Fixing SubThermistor

High-VoltagePower Supply PCB

Main Controller PCB 1/4

PCB3

Ground-Fault Breaker

Fixing Assembly

2

General Circuit Diagram 2 (Printer)

iR2270 / iR2870 / iR3570 / iR4570

F-1-2

A

4 3 2

C

B

D

E

F

A

C

B

D

E

F

7 6 5 1

4 3 27

7

7 6 5 1

F14-5418-A502 (2/11)

Laser Scanner Unit

iR2270/2870iR3570/4570

Feed Cover Sensor

Cassette 1 Paper P/A Sensor

Cassette 1 Paper Level A Sensor

Cassette 1 Paper Level B Sensor

Cassette 1 Retry Sensor

Cassette 1 Paper Pickup Solenoid

PS1 PS4 PS10PS3PS18 SL1

Cassette 2Paper P/ASensor

Cassette 2 Paper Level A Sensor

Cassette 2 Paper Level B Sensor

Cassette 2 Retry Sensor

Cassette 2 Paper Pickup Solenoid

PS2 PS6 PS11PS5 SL2

Cassette 1Paper Pickup MotorM6

Cassette 2 Paper Pickup Motor

Cassette 2 Size Detection PCB

Cassette 1 Size Detection PCB

Cassette Size Detection Connector PCBM7

Laser Driver PCB

Polygon Motor

BD PCBPCB11PCB10

M1

Polygon Motor

M1A

DC Controller PCB 2/4

Duplexing Feeder Sensor

PS17

Manual Paper P/A Sensor

PS7

Paper-Width Detection Volume

SVR1

Exhaust Fan (Rear)

FM2

Exhaust Fan (Front)

FM1

3

General Circuit Diagram 3 (Printer)

iR2270 / iR2870 / iR3570 / iR4570

F-1-3

A

4 3 2

C

B

D

E

F

A

C

B

D

E

F

7 6 5 1

4 3 27

7

7 6 5 1

F14-5418-A503 (3/11)

Paper Delivery Unit 1

Main Drive

iR2270/2870 iR3570/4570iR2270/2870iR3570/4570

Bottle Rotation Motor

M5

Hopper MotorM12

Drum Thermistor

TH3

Pre-Con. Exposure

LA1

Sub Hopper Toner Sensor

TS2 Developing Assembly Toner Sensor

TS1

Waste Toner Sensor

PS16

Front CoverSensorPS22

Environment Sensor

HU1

M10Duplexing Feeder MotorManual

Paper Pickup Clutch

CL1

Front Registration SensorPS9

Developing Sleeve Clutch

CL3

Registration ClutchRegistration Clutch

CL2CL22Main Motor

M2

DC Controller PCB 3/4

Paper Delivery Motor

M4

Paper Delivery Sensor 1

PS14

Paper Delivery Full Sensor 1

PS15 Duplexing Feeder Clutch CL6

4

General Circuit Diagram 4 (Printer)

iR2270 / iR2870 / iR3570 / iR4570

F-1-4

A

4 3 2

C

B

D

E

F

A

C

B

D

E

F

7 6 5 1

4 3 27

7

7 6 5 1

F14-5418-A504 (4/11)

To 2-Level Cassette Pedestal-Y2 To 3 Way Unit-A1 To Buffer Path Unit-E1

To Finisher-Q3/Saddle Finisher-Q4

To Finisher-S1

DC Controller PCB 4/4

5

General Circuit Diagram 5 (Printer)

iR2270 / iR2870 / iR3570 / iR4570

F-1-5

A

4 3 2

C

B

D

E

F

A

C

B

D

E

F

7 6 5 1

4 3 27

7

7 6 5 1

F14-5418-A505 (5/11)

Reader Unit

Control Panel Unit

Reader Heater (Right)

Reader Heater (Left)

Reader Controller PCB 1/2

H6

H5

Main Controller PCB 3/4

Card Reader-C1

NE Controller-A1

LCD1

Control Panel Unit Inverter PCB

LCD Control Panel

Control Panel Unit CPU PCB

Keypad PCB

6

General Circuit Diagram 1 (Reader)

iR2270 / iR2870 / iR3570 / iR4570

F-1-6

F14-3132-A601(6/11)

A

4 3 2

C

B

D

E

F

A

C

B

D

E

F

7 6 5 1

4 3 27

7

7 6 5 1

P S P S P S P S

P S P SP S P S P S

(AB) _TYPE(INCH/AB) _TYPE

(INCH/A)_ TYPE (A) _TYPE

TO DADF-N1

Reader Controller PCB 2/2

CISCIS1

Reader MotorM501

CIS HP SensorPS503

Copyboard Cover Open/Close Sensor (Front)

Copyboard Cover Open/Close Sensor (Rear)

PS502PS501

Document Sensor 1

PS504

Document Sensor 2

PS505

Document Sensor 3

PS506

Document Sensor 4

PS507

Document Sensor 1

PS504

Document Sensor 3

PS506

Document Sensor 4

PS507

Document Sensor 2

PS505 PS506

Main Controller PCB 4/4

Document Sensor 3

7

General Circuit Diagram 1 (G3FAX)

iR2270 / iR2870 / iR3570 / iR4570

F-1-7

FAX_G3_100V_1LINE (7/11)

A

4 3 2

C

B

D

E

F

A

C

B

D

E

F

7 6 5 1

4 3 27

7

7 6 5 1

to A505 J1005

to A505 J1059

to A501 J204

to A501 J221

Flat Cable

G3 FAX Power Supply PCB

Pseudo CI PCB

Modular PCB

NCU PCB

Speaker

SP1

PCB23

PCB28

PCB26

PCB24

Arrester PCB

PCB27

G3 FAX Control PCB

PCB22

8

General Circuit Diagram 2 (G3FAX)

iR2270 / iR2870 / iR3570 / iR4570

F-1-8

FAX_G3_100V_2LINE (8/11)

A

4 3 2

C

B

D

E

F

A

C

B

D

E

F

7 6 5 1

4 3 27

7

7 6 5 1

G3 Multi - portControl PCB

G3 FAX Control PCB

PCB22

tO A505 J1005

tO A505 J1059

to A501 J221

to A501 J204

Flat Cable

Flat Cable

G3 FAX Power Supply PCB

Off-hook Power Supply PCB

Modular PCB

NCU PCB

Speaker

SP1

PCB23

PCB28

PCB26

PCB24

Flat Cable

NCU PCB 2

PCB25

Arrester PCB

PCB27

9

General Circuit Diagram 3 (G3FAX)

iR2270 / iR2870 / iR3570 / iR4570

F-1-9

FAX_G3_120V_1LINE (9/11)

A

4 3 2

C

B

D

E

F

A

C

B

D

E

F

7 6 5 1

4 3 27

7

7 6 5 1

to A505 J1059

to A505 J1030

to A501 J221

Flat Cable

Speaker

SP1

G3 FAX Power Supply PCB

NCU PCB

PCB26

PCB24

Modular PCB

PCB28

G3 FAX Control PCB

PCB22

PCB23Off-hook Power Supply PCB

10

General Circuit Diagram 4 (G3FAX)

iR2270 / iR2870 / iR3570 / iR4570

F-1-10

FAX_G3_120V_2LINE (10/11)

A

4 3 2

C

B

D

E

F

A

C

B

D

E

F

7 6 5 1

4 3 27

7

7 6 5 1

to A505 J059

to A501 J221

to A505 J1005

Flat Cable

Flat Cable

G3 FAX Power Supply PCB

Modular PCB

NCU PCB

Speaker

SP1

PCB28

PCB26

PCB24

Flat Cable

NCU PCB 2G3 Multi - portControl PCB

G3 FAX Control PCB

PCB25

PCB22

PCB23Off-hook Power Supply PCB

11

General Circuit Diagram 5 (G3FAX)

iR2270 / iR2870 / iR3570 / iR4570

F-1-11

FAX_G3_230V (11/11)

A

4 3 2

C

B

D

E

F

A

C

B

D

E

F

7 6 5 1

4 3 27

7

7 6 5 1

to A505 J1059

to A505 J1030

to A501 J221

Flat Cable

Speaker

SP1

Off-hook Power Supply PCB

ModularPCB

NCU PCB

PCB28

PCB26

PCB24

G3 FAX Control PCB

PCB22

PCB23Off-hook Power Supply PCB

Nov 15 2004