Canon PC921 - General Circuit Diagram

A-5
1234567891011
J109
+24VU +24VU
GND
+5V
+24VU +24VU
123456
123456
J51
1
J52
2
21
J53
21
12
SL
SL3 SL1
SL
SL2
J54
SL
12
21
1 32
321
J55
SL4
SL
231
J56
PS2
J57
PS5
23 1
3
J113
1 2
DIG2
GND
3
J132
1 245
+5V
+24VU
GND
SL5
SL
1
2
J58
2
1
J59
PS4
23 1
3
GND
J114
1 2
GND GND
4 5
GND
6 7 8
J60
12345678
J108
2
1 543
GND
+5V
J751
321
Q751
J110
2
1 5436
M
M2
J106
1
2
+24VU
J602
1 2
J601
2
1
J3 VZ1
J4
J111
DIG0
12345678910111213141516171819
DIG1 DIG2 DIG3
GND
+5V
DIG4
163
J301
21 54 11876 109 141312 15 191817
2
12
1
J302 J303
J102
1 7423 65 98
DIG1 DIG1 GND DIG3 GND
1
2
3
4
5
6
7
8
9
9
8
7
6
5
4
3
2
1
1
2
J62
1
PS3
3
2
J61
J433
TH1
J103
12345678
J203
1432 65 7 8
7
J104
65432
2
J204
1 43 567
1
6
2
GND
J105
GND +24VR +5V
56
+5V +24VU
34
J202
2 31 54
1
To ADF
1
4
3
2
J107
1 32 4
GND +24VR
J601
3
4
32
1
1
2
4
AE
1
J301
PS1
32
J601
324 1
J101
3
+5V GND
12
J131
21
GND
TH2
+24VU
J130
1 2
FM1
J24F
J910
231
1
2
J201
1
2
J501F
J501
1
2
JP502
FT4FT2H
N FT1 FT3
JP501
J1
N FT1
J1
H FT2
J501
NF1
NF1
FT3
1
2
FT4
Line filter
LF1
J502
2
1
T302
J213
J212
J209
BP704
BP702
BP703
BP701
BP706
BP707
BP705
J14
J15
VZ2
J13
SP
TR
J12J11
PR
DV
J205
3214
GND +24VU
1
3
2
4
M
M1
J901
J2
2 1
J207
1
22
1
J434
2
1
J16
J15
H1
J17
FU2
FU1
FT6
FT5
LA1
DC CONTROLLER PCB
COMPOSITE POWER SUPPLY PCB
HVT BOARD 1
HVT BOARD 2
MAIN MOTOR DRIVER PCB
SENSOR PCB
SIDE BLANK EXPOSURE PCB CONTROL PANEL PCB
Power switch
NOISE FILTER PCB
NOISE FILTER PCB
AE SENSOR PCB
[220/240V]
[120V]
To ADF
DS1
Door switch
DS1
Door switch
Scanner home
position sensor
Scanner
thermistor
Scanner
cooling fan
AFREF AE SCHP TH2 FM1D*
LNSLD*
PUSLD*
RGSLD*
MFSLD*
LHP
Lens
solenoid
Pickup clutch
solenoid
Registration
clutch solenoid
Multifeeder
pickup solenoid
Lens home
position sensor
Single-feeder
paper sensor
Cassette
pickup solenoid
Vertical path roller
paper sensor
SFPD
CPUSD*
PDP
REQ
ACK
TXD
RXD RPD
Pre-registration roller
paper sensor
SC_B
SC_B*
SC_COM
SC_A*
SC_COM
SC_A
Scanner/lens
drive motor
SB_LP*
Varistor 1
Fixing film
SEG0* SEG1* SEG2* SEG3* SEG4* SEG5* SEG6* SEG7*
KR0 KR1
PWOFF
DSVR
Delivery sensor
Fixing thermistor
TH1 HEAT0 HEAT1 DPD ACK* RLOFF* PR_DC_ON CPS_REQ MMD DV_AC_ON DV_DC_ON STBY/CPY* PWOFF S_IN MLOCK HEAT_TRG ZER_CRS S_CLK S_OUT
Varistor 2
Main motor
MLOCK MMD
Fixing heater
Thermal fuse 2
Thermal fuse 1
Scanning lamp
(Multifeeder
type only)
(Single-feeder
type only)
C. General Circuit Diagram
1. Copier