Mf4890Dw/Mf4880Dw/Mf4870Dn - Canon imageCLASS MF4890dw Service Manual

General Circuit Diagram

■ MF4890dw/MF4880dw/MF4870dn

10 9
Control Panel PCB
J403
+5R
GND
F
1 2
1
2
3
4
5
6
+3.3R
7
RESET
8
9
10
SDATA
11
SCLK
12
GND
13
+5.5R
14
GND
15
E KO0/LED401
16
KO1/LED402
17
KO2/LED403
18
KO3/LED404
19
KO4/LED405
20
KO5/LED406
21
KO6/LED407
22
XWR1
23
ESS_LED
24
ESS_KEY
25
W-LED
26
27
28
29
30
Reader
Motor
LCD
D
DADF Solenoid
BO/
BO
DADF Motor
AO/
AO
C
(White-model only)
DS Sensor
DES Sensor
DADF model only
B Speaker
B0/
B0
SADF Motor
A0/
A0
(White-model only)
DS
GND
DS Sensor
A
+3.3V
DES
GND
+3.3R
DES Sensor
SADF model only
10 9
8 7
VIN
KI1
MODE
KI2
GND
KI3
+3.3R
KI4
VREF
KI5
SP
GND
CIS UNIT
CLK
+5.5R
LED_B
A0P
LED_G
CS1
LED_R
GND
+24V
+24V
+24V
GND
GND
GND
+3.3V
Overvoltage detection
S_RST/
E_RST/
SC
SCLK
BDO/
B0/
B0 GND
A0/ VDO2/
VDO2
A0
GND
VDO1
VDO1/
GND
Main Controller PCB
SL
+5V
+24V
GND
WIFI RESET/
N.C
+3.3V
SD DATA2
SD DATA0
SD CMD
MAC LINK LED
M_WAKEUP
GND
SD CLK
GND
H_WAKEUP
SD DATA3
DS
+3.3V
GND
SD DATA1
+3.3V
GND
DES
GND
+3.3R
GND
ONOFF1
RING_CLK
ONOFF2
GND
+24V
2
SP
1
J601 J602
1 2
8 6 4 2
1 2
7 5 3 1
(for AUS)
1 3 5 7
1 2
2 4 6 8
1 2
J1201 J1204
TEL_RING
TEL_TIP
FAX-NCU PCB
(FAX 100V model only)
(FAX model only)
FG900
(FAX 100V model only)
8 7
6 5
(FAX model only)
Toner TR_CABLE(100V) (100V DADF 4in1 WIFI only)
Sensor
5V DCDC
TR_CABLE(120V)
J909 J908
TR_CABLE(230V)
1 2 3 4 5 1 2 3 4 5
4 3 2 1
HV
1 2 3 4 5 1 2 3 4 5
J304 J907 J906
Engine Controller PCB
GND
TEST
SO
SI
J501
WiFi
module
GND
SWON
1 2
J1104
3 5
Pseudo CI
1 2
PCB
4 6
SW PCA
J104
1 3 J581
J911
2 1
TAG_IN
TAG_OUT
1
INLET
2
3
6 5
4 3 2
Main Fan Unit
(DUPLEX model only)
Duplex Solenoid
1 2
Duplex Driver PCB
DUPSOL
GND
+24P2
FANLOCK
J1101
FANON
1 2 3 4 5
5 4 3 2 1
GND
16
J1154
GND
15
GND
14
GND
13
+24P2
12
+24P2
11 Encoder Sensor
+24P2
10
+24P2
9
+5R
8 1 2 3
FANON
7
MTRPWM
ACC J1152
6
+24P2
DEC Motor Driver PCB
5
MTRPWM/
4
MFG
3
DUPSOL
2
J1153
FANLOCK
1 J1151
4 3 2 1
1 2 3 4
GND
J801
+5V
J802
M
BDIR/
GND
1 2 3 4
VDO2/
Laser Scanner Motor
VDO2
GND
Laser
VDO1
VDO1/ Driver PCB
GND
CNT2
CNT1
CNT0
Laser Scanner Unit
+3.3V
Multi Pickup
GND
MUL_SNS/ Sensor
BIAS_PCA
JP1201 JP1202
+24U
Pickup Solenoid
SL
2 Fixing Delivery Unit
Thermoswitch
TP
Thermistor
Fixing Heater
1
Fixing
Paper
+3.3U
1
Delivery
POSNS/ Width
GND
2
Sensor
PWSNS/ Sensor
FSRTH
3
GND
4
FSRTH
5
1 2 3 1 2 3
Fixing Delivery
/Paper Width Sensor PCB
Thermistor
Paper Leading Edge Sensor
+3.3U
3
PISNS/
2
GND
1
1 2 3
Memory Tag
J3
1
2
4 3 2
9-4
1
3
F
E
Main Motor
D
C
B
A
1
P.1
F-9-1
9-4