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

5
2 General Circuit Diagram
Signal Names
List Of Signals
iR C6800C / iR C6800CN / iR 5800C / iR 5800CN
T-2-1
Abbreviation Signal name
AFTER_TRNS_HP_S
NS post-transfer paper detection signal
ATR_REF ATR sensor reference signal
ATR_SIG ATR sensor signal
ATR_VCC ATR power supply signal
ATR_VSS ATR sensor light detection signal
ATRLED_ON ATR sensor light emission signal
ATRSL_ON ATR shutter solenoid drive signal
BK_CRG_DOOR_OP
N hopper cover open/closed detection signal
BK_DC_CONT black development DC bias control signal
BK_DEV black developing bias drive signal
BK_DEV_CL black development clutch drive signal
BK_TNR_REMAIN black toner level detection signal
CHD_CLK side deck clock signal
CHO_RXD side deck communication signal 0
CHO_RXLOAD* side deck data request signal
CHO_TXD side deck communication signal 1
CHO_TXEND* side deck communication final signal
CHO_TXOUTEN* side deck data enable signal
CL_CRG_DTC color toner cartridge present/absent signal
CL_DEV color developing bias drive signal
CL_TNR_REMAIN
color toner level detection signal (light-receiving
segment)
CL_TNR_SNS_ON
color toner level detection signal (light-emitting
segment)
CLR_DC_CONT color developing DC bias control signal
CLR_DEV_CL color developing clutch drive signal

6
CLR_TNR_SPLY_C
L color toner supply clutch drive signal
CMNCLK_A1 HVT1 high-voltage bias reference signal
CMNCLK_A1 HVT2 high-voltage bias reference signal
CNT0 laser control signal 0
CNT1 laser control signal 1
CRG_MTR_ON black toner supply motor drive signal
CST_FEED_M_CLK
A cassette pickup motor drive signal A
CST_FEED_M_CLK
AB cassette pickup motor drive signal AB
CST_FEED_M_CLK
B cassette pickup motor drive signal B
CST_FEED_M_CLK
BB cassette pickup motor drive signal BB
CST_HEAT_ON cassette heater drive signal
CUAL_FAN delivery cooling fan 1 drive signal
CUAL_FAN_ERR delivery cooling fan 1 error detection signal
D_LOAD finisher start-up signal
DCP_FAN_LOK* power supply fan lock detection signal
DCP_REM0 power supply remote signal 0
DCP_REM1 power supply remote signal 1
DCP_REM2 power supply remote signal 2
DCP_REM3 power supply remote signal 3
DEIL_FLAP_SL delivery reversing solenoid drive signal
DEV_BK_AC_ON black developing AC bias drive signal
DEV_BK_DC_ON black developing DC bias drive signal
DEV_CL_AC_ON color developing AC bias drive signal
DEV_CL_DC_ON color developing DC bias drive signal
DEV_MTR_CLK developing motor reference signal
DEV_MTR_CW/
CCW developing motor drive detection switchover signal
DEV_MTR_ID development motor identification signal
DEV_MTR_LOK* development motor lock detention signal
DEV_MTR_ON development motor drive signal
Abbreviation Signal name

7
DEV_MTR_SEL development motor speed switchover signal
DEVBKCLK1 black developing bias reference signal A
DEVCLCLK_A1 color developing bias reference signal A
DEVCLCLK_B1 color developing bias reference signal B
DRAM_HP_SNS drum HP detection signal
DRUM_HEAT_ON drum heater drive signal
DRUM_MTR_BRAK
E drum/ITB motor drive direction switchover signal
DRUM_MTR_CLK drum/ITB motor reference signal
DRUM_MTR_ID drum/ITB motor identified signal
DRUM_MTR_LOK* drum/ITB motor lock detection signal
DRUM_MTR_ON drum/ITB motor drive signal
DRUM_MTR_SEL drum/ITB motor speed switchover signal
DUP_FEED_SNS duplexing left detection signal
DUPLEX_CENTER_
M_CLK_A depleting middle motor drive signal A
DUPLEX_CENTER_
M_CLK_AB duplexing middle motor drive signal AB
DUPLEX_CENTER_
M_CLK_B duplexing middle motor drive signal B
DUPLEX_CENTER_
M_CLK_BB duplexing middle motor drive signal BB
DUPLEX_LEFT_M_
CLK_A duplexing left motor drive signal A
DUPLEX_LEFT_M_
CLK_AB duplexing left motor drive signal AB
DUPLEX_LEFT_M_
CLK_B duplexing left motor drive signal B
DUPLEX_LEFT_M_
CLK_BB duplexing left motor drive signal BB
DUPLEX_REV_M_C
LK_A duplexing reversal motor drive signal A
DUPLEX_REV_M_C
LK_AB duplexing reversal motor drive signal AB
DUPLEX_REV_M_C
LK_B duplexing reversal motor drive signal B
DUPLEX_REV_M_C
LK_BB duplexing reversal motor drive signal BB
Abbreviation Signal name

8
DUPLEX_RIGHT_M
_CLK_A duplexing right motor drive signal A
DUPLEX_RIGHT_M
_CLK_AB duplexing right motor drive signal AB
DUPLEX_RIGHT_M
_CLK_B duplexing right motor drive signal B
DUPLEX_RIGHT_M
_CLK_BB duplexing right motor drive signal BB
ELIMINATE static eliminator bias drive signal
ENV_HUM_CLK environment sensor reference signal
ENV_TEMP environment sensor detection signal
EPC_SIG potential sensor reference signal
EPC_SNS_ON potential sensor detection signal
EX_FIX_HP_SNS outside heating roller HP detection signal
EX_FIX_P_MTR_A outside heating roller shift motor drive signal A
EX_FIX_P_MTR_A* outside heating roller shift motor drive signal A*
EX_FIX_P_MTR_B outside heating roller shift motor drive signal B
EX_FIX_P_MTR_B* outside heating roller shift motor drive signal B*
EX_FIX_THM_EDG
E_IN outside heating sub thermistor detection signal
EX_FIX_THM_IN outside heating main thermistor detection signal
EX-HEAT-ON outside heating roller heater drive signal
EXP_LED pre-exposure LED drive signal
EX-TR-ERR outside heating roller heater error signal
FEED_FAN_4 feed fan 4 drive signal
FEED_FAN1 feed fan 1 drive signal
FEED_FAN1_ERR feed fan 1 error detection signal
FEED_FAN2 feed fan 2 drive signal
FEED_FAN2_ERR feed fan 2 error detection signal
FEED_FAN3 feed fan 3 drive signal
FEED_FAN3_ERR feed fan 3 error detection signal
FEED_FAN4_ERR feed fan 4 error detection signal
FIN_FAN exhaust heat cooling fan 2 drive signal
FIN_FAN_LOK* exhaust heat cooling fan 2 lock detection signal
FIRST_TRN primary transfer bias drive signal
Abbreviation Signal name

9
FIX_ENT_SNS fixing inlet detention signal
FIX_FAN fixing exhaust fan drive signal
FIX_FAN_LOK* fixing exhaust fan lock detection signal
FIX_MTR_BRAKE fixing motor stop signal
FIX_MTR_CLK fixing motor reference signal
FIX_MTR_ID fixing motor identification signal
FIX_MTR_LOK* fixing motor lock detection signal
FIX_MTR_ON fixing motor drive signal
FIX_MTR_SEL fixing motor selection signal
FIX_WEB_REMAIN fixing web length detection signal
FIX_WEB_SL web solenoid drive signal
FRONT_DOOR_OPN front cover detection signal
FSR_UNIT_CNCT* fixing assembly present/absent detection signal
GRID_CONT grid bias control signal
HOP_MTR_0 hopper stirring motor drive signal 1
HOP_MTR_1 hopper stirring motor drive signal 0
HV_RMT high-voltage bias remote signal
HV_RMT HVT 3 enable signal
IN_DELI_SNS inside delivery detection signal
ITB_CLN_HP_SNS ITB cleaner HP detection signal
ITB_CLN_P_MTR_A ITB cleaner shift motor drive signal A
ITB_CLN_P_MTR_A
* ITB cleaner shift motor drive signal/A
ITB_CLN_P_MTR_B ITB cleaner shift motor drive signal B
ITB_CLN_P_MTR_B
* ITB cleaner shift motor drive signal/B
ITOP_SNS_A ITB HP sensor detection signal A
ITOP_SNS_B ITB HP sensor detection signal B
JOIN_SNS vertical path confluence detection signal
L_DECK_DTC left deck paper detection signal
L_DECK_EXIT_SL left deck confluence solenoid drive signal
L_DECK_FEED_SN
S left deck pickup detection signal
L_DECK_LIFT left deck lifter motor drive signal
Abbreviation Signal name

10
L_DECK_LIMIT_SN
S left deck limit detection signal
L_DECK_M_CLKA left deck pickup motor drive signal A
L_DECK_M_CLKAB left deck pickup motor drive signal AB
L_DECK_M_CLKB left deck pickup motor drive signal B
L_DECK_M_CLKBB left deck pickup motor drive signal BB
L_DECK_PAP_HIG
HT_SNS left deck lifter detection signal
L_DECK_PAP_SNS left deck paper detection signal
L_DECK_REMAIN_
SNS0 left deck paper level detection signal A
L_DECK_REMAIN_
SNS1 left deck paper level detection signal B
L_DECK_SL left deck pickup solenoid drive signal
LDPSEL laser power selection signal
LO_CST_FEED_SNS cassette 4 pickup detection signal
LO_CST_LIMIT_SN
S cassette 4 limit detention signal
LO_CST_PAP_HIGH
T_SNS cassette 4 lifter detection signal
LO_CST_PAP_SNS cassette 4 paper detection signal
LO_CST_REMAIN_
SNS0 cassette 4 paper level detection signal A
LO_CST_REMAIN_
SNS1 cassette 4 paper level detection signal B
LO_CST_SIZE0 cassette 4 paper size detection signal 0
LO_CST_SIZE1 cassette 4 paper size detection signal 1
LO_CST_SIZE2 cassette 4 paper size detection signal 2
LO_CST_SIZE3 cassette 4 paper size detection signal 3
LO_CST_SIZE4 cassette 4 paper size detection signal 4
LO_CST_SL cassette 4 pickup solenoid drive signal
LOW_CST_LIFT cassette 4 lifter motor drive signal
MAIN_THM_EDGE_
IN fixing sub thermistor detection signal
MAIN_THM_IN fixing main thermistor detection signal
MAIN-HEAT-ON fixing main heater drive signal
Abbreviation Signal name

11
MAIN-TR-ERR fixing main heater error signal
MLT_LAST_PAP_S
NS last sheet detection signal
MLT_PAP_SNS manual feed paper detection signal
MLT_PAP_WIDTH manual feed paper width detection signal
MLT_SL manual feed pickup solenoid drive signal
MLT_TRAY_OPN manual feed unit open/closed detection signal
MODE finisher mode switchover signal
OHP_LED0 transparency sensor (front) light emission signal
OHP_LED1 transparency sensor (rear) light emission signal
OHP_SNS0 transparency sensor (rear) light reception signal
OHP_SNS1 transparency sensor (front) light reception signal
OUT_DELI_MTR_A outside delivery motor drive signal A
OUT_DELI_MTR_A
* outside delivery motor drive signal A*
OUT_DELI_MTR_B outside delivery motor drive signal B
OUT_DELI_MTR_B
* outside delivery motor drive signal B*
OUT_DELI_SNS outside delivery paper detection signal
PAP_STAGNATE_S
NS left deck stationary paper detection signal
PATCH_LED_ON patch image read sensor light emission signal
PATCH_LED_ON patch image read sensor reference signal
PATCH_LED_REF patch sensor shutter solenoid drive signal
PATCH_SHUT_SL patch sensor shutter solenoid drive signal
PATCH_VOP patch image read sensor detention signal P
PATCH_VOS patch image read sensor detention signal S
PD_MTR_CLK side deck clock signal 1
PKIT_FAN controller cooling fan dire signal
PKIT_FAN_LOK* controller cooling fan lock detection signal
POST pre-transfer bias drive signal
POST_AC_ON pre-transfer bias AC drive signal
POST_CLN_MTR0
pre-transfer charging wire cleaning motor drive
signal 0
Abbreviation Signal name

12
POST_CLN_MTR1
pre-transfer charging wire cleaning motor drive
signal 1
POST_DC_ON pre-transfer bias DC drive signal
POSTCLK_A1 pre-transfer bias reference signal A
POSTCLK_B1 pre-transfer bias reference signal B
POSTCONT pre-transfer bias control signal
PRE_REGI_MTR_A manual feed pre-registration motor drive signal A
PRE_REGI_MTR_A* manual feed pre-registration motor drive signal A*
PRE_REGI_MTR_B manual feed pre-registration motor drive signal B
PRE_REGI_MTR_B* manual feed pre-registration motor drive signal B*
PRE_REGI_SNS pre-registration paper detection signal
PRESS-HEAT-ON pressure heater drive signal
PRESS-TR-ERR pressure heater error signal
PRIM_CLN_MTR0 primary charging wire cleaning motor drive signal 0
PRIM_CLN_MTR1 primary charging wire cleaning motor drive signal 1
PRIM_CONT primary charging bias control signal
PRIM_EX_FAN primary charging exhaust fan drive signal
PRIM_EX_FAN_LO
K* primary charging exhaust fan lock signal
PRIM_IN_FAN primary charging suction fan drive signal
PRIM_IN_FAN_LOK
* primary charging suction fan lock detection
PRIM_ON primary charging bias drive signal
PRIMARY primary charging bias drive signal
PRS_THM_EDGE_I
N pressure sub thermistor detection signal
PRS_THM_IN pressure main thermistor detection signal
R_DECK_DTC right deck paper detection signal
R_DECK_FEED_SN
S right deck pickup detection signal
R_DECK_LIFT right deck lifter motor drive signal
R_DECK_LIMIT_SN
S right deck limit detection signal
R_DECK_M_CLKA right deck pickup motor drive signal A
R_DECK_M_CLKA
Ｂright deck pickup motor drive signal AB
Abbreviation Signal name

13
R_DECK_M_CLKＢright deck pickup motor drive signal B
R_DECK_M_CLKBB right deck pickup motor drive signal BB
R_DECK_PAP_HIG
HT_SNS right deck lifter detection signal
R_DECK_PAP_SNS right deck paper detection signal
R_DECK_PULL_M_
CLKA right deck pull-off motor drive signal A
R_DECK_PULL_M_
CLKAB right deck pull-off motor drive signal AB
R_DECK_PULL_M_
CLKB right deck pull-off motor drive signal B
R_DECK_PULL_M_
CLKBB right deck pull-off motor drive signal BB
R_DECK_REMAIN_
SNS0 right deck paper level detection signal B
R_DECK_REMAIN_
SNS1 right deck paper level detection signal A
R_DECK_SL right deck pickup solenoid drive signal
R_LOW_DOOR_OP
N lower right cover open/closed detection signal
RE_FEED_SNS duplexing confluence detection signal
REAL_BD* BD detection signal
REGI_DRIVE_M_CL
K_A registration motor drive signal A
REGI_DRIVE_M_CL
K_AB registration motor drive signal AB
REGI_DRIVE_M_CL
K_B registration motor drive signal B
REGI_DRIVE_M_CL
K_BB registration motor drive signal BB
RELAY_ON relay drive signal
REV_ALIENATE_SL reversal interval solenoid drive signal
REV_SNS reversal detection signal
REV_TATE_PAS_S
NS reversal vertical path detention signal
ROT_MTR_A developing rotary motor drive signal A
ROT_MTR_A* developing rotary motor drive signal A*
ROT_MTR_B developing rotary motor drive signal A*
Abbreviation Signal name

14
ROT_MTR_B* developing rotary motor drive signal B*
ROTARY_HP_SNS developing rotary HP detection signal
ROTARY_SL developing rotary fixing solenoid drive signal
ROTARY_SL_SNS developing rotary fixing detection signal
RSET finisher reset signal
SCN_ACC* scanner motor acceleration signal
SCN_DEC* scanner motor deceleration signal
SCN_FG_IN* scanner motor speed detection signal
SEC_ROLL_PRESS_
M_A secondary transfer roller shift motor drive signal A
SEC_ROLL_PRESS_
M_A* secondary roller shift motor drive signal A*
SEC_ROLL_PRESS_
M_B secondary transfer roller shift motor drive signal B
SEC_ROLL_PRESS_
M_B* secondary transfer roller shift motor drive signal B*
SEC_TRNS_HP_SNS secondary transfer roller HP detection signal
SECOND_TR secondary transfer bias drive signal
SFTTRAY_CCW shift tray motor drive signal 0
SFTTRAY_CNCT shift tray connection detection signal
SFTTRAY_CW shift tray motor drive signal 1
SFTTRAY_FULL_O
N shift tray full detection signal 1
SFTTRAY_L_HP shift tray left HP detection signal
SFTTRAY_PAP_FU
LL shift tray full detection signal 0
SFTTRAY_PAP_SNS shift tray paper detection signal
SFTTRAY_R_HP shift tray right HP detector signal
STPC_RXD finisher communication signal 0
STPC_TXD finisher communication signal 1
SUB_HOP_REMAIN hopper toner level detection signal
SUB-HEAT-ON fixing sub heater drive signal
SUB-TR-ERR fixing sub heater error signal
TR_REV_BIAS secondary transfer reversal bias drive signal
TR1_CRT_SEL primary transfer current selection signal
Abbreviation Signal name