Canon iR C6800 Series Service manual

Jan 20 2005
General Timing Chart / General
Circuit Diagram
iR C6800 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 found
in advertising and other printed matter.
Any questions regarding the information contained herein should be directed to the Copier Service Department of the
Sales 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
Caution
Use of this manual should be strictly supervised to avoid disclosure of confidential information.

Contents
1 General Timing Chart............................................................................................................................................... 1
Full color ................................................................................................................................................................. 1
Mono color .............................................................................................................................................................. 3
2 General Circuit Diagram .......................................................................................................................................... 5
Signal Names........................................................................................................................................................... 5
General Circuit Diagram ....................................................................................................................................... 16

1
1 General Timing Chart
Full color
iR C6800C / iR C6800CN / iR 5800C / iR 5800CN

2
F-1-1
PRINT LSTR PSTBYPSTBY PINTR
STBYSTBY SCFW SCRW
M1 M2 Y1 Y2 C1 C2 Bk1 Bk2
*1
OHP sensor front/
rear (PS3/29)
*2
*2
Right deck pull-off
motor (M14)
Manual feed pre
-registration motor (M6)
<Conditions>
reading: book, 1 A4 original
printing: A4, plain paper, single-sided, full color, 2 prints
Original exposure
Scanner motor
(M501)
Scanning lamp
Scanner HP sensor
(PS501)
Laser exposure system
Printer unit
Laser scanner
motor(M1)
ITB home
position signal
PVREQ signal
Drum/ITB motor
(M2)
Primary charging
bias
Grid bias
Laser
Pre-exposure
LED (LED1)
Black developing
bias (DC)
Black developing
bias (AC)
Black developing
clutch (CL3)
Developing
rotary motor (M5)
Stray toner
collection roller bias
Image formation system
Primary transfer bias
Color developing
bias (DC)
Color developing
clutch (CL1)
Pre-transfer charging
bias (AC)
Color developing
bias (AC)
Pre-transfer charging
bias (DC)
ITB cleaner shift
motor (M21)
Secondary transfer
outside roller shift
motor (M20)
Secondary transfer
bias
Secondary transfer
cleaning bias
Right deck pickup
motor (M17)
Deck (right) pickup
solenoid (SL6)
Right deck pickup
sensor (PS33)
Pickup/feeding system
Registration motor
(M8)
Fixing system
Fixing main heater
(H1)
Fixing sub heater
(H2)
Shift heater
(H3)
Outside heating
roller heater (H4)
Outside heating roller
shift motor (M22)
Fixing motor (M4)
Fixing inlet sensor
(PS11)
Outside delivery
sensor (PS13)
*1: interval used to stabilize the rotation.
*2: interval during which the main heater and the sub heater are tuned on alternately.
Start key ON
Start key ON
Image formation
ready timing
:forward :reverse

3
Mono color
iR C6800C / iR C6800CN / iR 5800C / iR 5800CN
F-1-2
PRINT LSTR PSTBYPSTBY PINTR
STBYSTBY SCFW SCRW
Bk1
1
2
2
Bk2
<Conditions>
reading: book mode, 1 A4 original
printing: A4, plain paper, single-sided, mono color, 2 prints
Original exposure
Scanner motor
(M501)
Scanning lamp
Scanner HP sensor
(PS501)
Start key ON
Start key ON
Laser exposure system
Printer unit
Laser scanner
motor(M1)
ITB home
position signal
PVREQ signal
Laser
Drum/ITB motor
(M2)
Primary charging
bias
Grid bias
Pre-exposure
LED (LED1)
Black developing
bias (DC)
Black developing
bias (AC)
Black developing
clutch (CL3)
Developing
rotary motor (M5)
Stray toner
collection roller bias
Primary transfer bias
Color developing
bias (DC)
Color developing
clutch (CL1)
Pre-transfer charging
bias (AC)
Color developing
bias (AC)
Pre-transfer charging
bias (DC)
ITB cleaner shift
motor (M21)
Secondary transfer
outside roller shift
motor (M20)
Secondary transfer
bias
Secondary transfer
cleaning bias
Image formation system
Pickup/feeding system
OHP sensor front/
rear (PS3/29)
Right deck pull-off
motor (M14)
Manual feed pre
-registration motor (M6)
Right deck pickup
motor (M17)
Deck (right) pickup
solenoid (SL6)
Right deck pickup
sensor (PS33)
Registration motor
(M8)
Fixing system
Fixing main heater
(H1)
Fixing sub heater
(H2)
Shift heater
(H3)
Outside heating
roller heater (H4)
Outside heating roller
shift motor (M22)
Fixing motor (M4)
Fixing inlet sensor
(PS11)
Outside delivery
sensor (PS13)
*1: interval used to stabilize the rotation.
*2: interval during which the main heater and the sub heater are tuned on alternately.
Image formation
ready timing
:forward :reverse