Table of Contents
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General Circuit Diagram
8
F
MF728Cdw/727Cdw
/726Cdw/725Cdn
J943
UN16
FAX-NCU PCB
J944
UN17
J942
Off Hook PCB
J945
J941
J2001
19
2
1
J2009
E
1
2
3
4
5
6
19
J9211
J918
J914
J915
J929
1
2
3
4
5
6
4
3
2
1
3
2
1
D
MF728Cdw
MF727Cdw
/724Cdw
/726Cdw
/725Cdn
1
2
SW1
SW1
1
2
Main
Main
1
2
Power
Power
B3
A1
Switch
Switch
C
3
2
1
1
2
3
4
5
6
1
2
3
4
1
2
1
2
J351
J352
J1391LB
J1391L
UN9
Low Voltage Sub PCB
J388
1
2
B
J6002
SOLD3
H
1
INLET
2
SOLD6
MT301
3
SOLD4
N
J210
2
1
J205
J211
J204
1
2
3
4
5
6
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
A
6
5
4
3
2
1
8
7
6
5
4
3
2
1
8
7
6
5
4
3
2
1
J2001
J2002
J2003
M
M
M
M4
M1
M2
Fixing Motor
Drum Motor
Developing
Motor
8
7
6
USB-Memory
J9710
1
VBUS
1
PC
2
DM
2
UN15
3
DP
3
J9091
J9111
4
GND
4
USB Host PCB
4
8
J972
6
5
4
3
2
1
MF728Cdw/727Cdw
/726Cdw/724Cdw
LCD
UN23
Wireless LAN PCB
LINE
J1005
17
TEL
CT
SP1
Speaker
2
1
17
1
2
3
4
5
4
8
J922
J908
J910
J909
J911
J912
23
VIN
VSS1
VIN
UN3
VSS2
J1002
High Voltage
VIN
Power Supply PCB
VSS3
J1001
VIN
VSS4
31
J11
J12
J13
J14
TAG1
TAG2
TAG3
TAG4
31
23
J130
J133
J151
17 16 15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
J4001D
J4001DH
J4001L
1
2
3
4
5
6
7
1
2
3
4
5
6
7
8
9
10
J361
J362
J386
J386B
J387
230V
1
2
3
4
5
6
7
1
2
3
1
2
3
J4003MB
H220
TH801
Fixing
1
2
heater
TB1B
TB2B
Thermistor
FU1B
120V
J4003F
J4003MA
H120
Fixing
1
2
heater
TB1A
TB2A
FU1A
7
6
5
4
3
2
1
J383
J311
UN8
Low Voltage Main PCB
J312
7
6
5
4
to OPTION FEEDER
3
2
1
J4004D
J4004DA
J213
1
2
3
4
UN2
Driver PCB
J206
J208
J207
J209
J202
J203
3
2
1
1
2
1
2
1
2
1
2
3
4
1
2
3
4
4
3
2
1
4
3
2
1
J2004
J2005
3 2 1
M
M
CL
SL
SL
FM1
CL1
SL2
SL1
Fixing
MP Tray
Cassette
MP Tray
M5
M3
/Fixing
Feeding
Pickup
Pickup
Pickup
Registration
Power Supply
Clutch
Solenoid
Solenoid
Motor
Motor
Cooling Fan
7
6
5
4
Control Panel Unit
1
YN
1
2
XN
2
TTP
3
YP
3
4
XP
4
28
GND
28
GND
27
27
+3.3V_A
UN14
26
26
+3.3V_A
25
25
Control Panel NFC PCB
+3.3V_D
24
24
+3.3V_D
23
23
SHUT
22
22
DCLK
21
21
VSYNC
20
20
19
HSYNC
19
18
DISP_ENB
18
J951
FT41
17
DATA7
17
2
4
6
8
10
12
14
16
18
20
22
24
26
28
16
DATA6
16
1
3
5
7
9
11
13
15
17
19
21
23
25
27
DATA5
15
15
DATA4
14
14
DATA3
13
13
DATA2
12
12
DATA1
11
11
DATA0
10
10
SDOUT
9
9
SCLK
8
8
7
/SCS
7
RD Unit
6
/RESET
6
5
SDIN
5
4
LED_ANODE
4
MT42
LED_ANODE
3
3
LED_CATH
2
2
LED_CATH
1
1
1
3
5
7
9
11
13
15
17
19
21
23
25
27
2
4
6
8
10
12
14
16
18
20
22
24
26
28
J924
UN13
Main Controller PCB
Laser Scanner Unit
M7
Laser Scanner
Motor
UN4
Laser Driver PCB
J501
M
25
J2007
1
2
3
4
4
3
2
1
25
J132
J131
UN1
DC Controller PCB
J140
J150
J157
J156
31
1
2
3
4
5
6
7
8
9
10
1
2
1
2
3
Release Sensor
4
3
2
1
1
2
3
4
J4017L
J4017D
6
5
4
3
2
1
2
1
J708
J4017DH
J707
J706
UN6
Fixing Relay PCB
J709
J710
1
2
3
1
2
3
4
5
6
7
8
9
2
1
2
1
2
1
TH802
TH803
Main
Sub
Sub
Thermistor 1
Thermistor 2
3
2
1
3
2
1
3
2
1
3
2
1
J3014
J3013
J3012
J4018
SR8
SR9
SR10
SR15
Fixing Film Unit
Fixing Delivery
Fixing
Fixing Loop
Delivery Full
Sensor
Pressure
Sensor
Sensor
Release
Fixing Assembly
Sensor
SUBRLD
J3005
1
2
3
SGND
J654
+24V
UN7
J651
SR2
Fixing Sub PCB
Front Cover
J653
Sensor
31
FEEDMI3
31
30
FEEDMB
30
29
FEEDMI2
29
28
FEEDMI1
28
27
FEEDMA
27
26
26
FEEDMI0
25
REGIMI3
25
24
REGIMI1
24
23
REGIMI2
23
22
REGIMB
22
21
REGIMA
21
20
REGIMI0
20
19
FANPWM
19
18
CSTPKSL
18
17
FANLK
17
16
FSRMFG
16
15
/FSRMDEC
15
14
14
/FSRMACC
13
13
FSRMREV
12
MPTPKSL
12
11
MPTCLCH
11
10
OPTPKSL
10
9
OPTPS
9
8
DRMMREV
8
7
/DRMMACC
7
6
/DRMMDEC
6
5
DRMMFG
5
4
/DEVMACC
4
3
/DEVMDEC
3
2
2
DEVMFG
1
1
SGND
5
4
316
3
2
Reader Unit
UN12
PS701
CIS Unit
CIS
M720
Homeposition
Reader Motor
J409
Sensor
2
4
6
8
10
12
14
M
1
3
5
7
9
11
13
15
3
2
1
1
2
3
4
1
2
3
4
5
J1404
3
2
1
J961
UN20
SL4
NFC PCB
ADF Pickup
Solenoid
SL
2
1
MF727Cdw
/726Cdw
2
1
J1003L
J1003DH
J1003D
1
2
J1402L
J1401L
1
2
3
1
2
3
4
MT22
J1401DH
J1402DH
3
2
1
4
3
2
1
J1401D
J1402D
MT21
1
3
5
7
9
11
13
15
1
2
3
4
5
6
7
2
4
6
8
10
12
14
J904L
J901
PCB28
Environment
Sensor
SL3
Developing
Separation
Solenoid
J3015
1
2
3
4
SL
2
1
4
3
2
1
1
2
J153
J154
J141
25
SR16
SR14
SR7
ITB Pressure
MP Tray Paper
Detection Sensor
MP Tray
Registration
Pre-Registration
Detection
Detection Sensor
3
2
1
3
2
1
J3006
J3010
3
2
1
J3011
1
2
3
3
2
1
1
2
3
4
5
6
7
25
1
2
3
4
J167
J162
J160
UN5
Relay PCB
J161
J166
J165
J164
6
5
4
3
2
1
6
5
4
3
2
1
3
2
1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
J3001
J3004
J3003
J3002
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
SR6
SR13
SR12
SR1
J611
J601
PCB30
Developing
Cassette Paper
Pre-registration
Paper Feeder
Patch
Homeposition
Detection Sensor
Detection Sensor
Pre-Registration
Registration
Sensor
Detection Sensor
Sensor
3
2
General Circuit Diagram
1
ADF Unit
PS703
PS702
M721
Document
Document
ADF Motor
Sensor
End Sensor
F
M
3
2
1
3
2
1
1
2
3
4
MT32
3
2
1
3
2
1
1
2
3
4
J1305
J1302
J1312
J1310L
1
2
3
4
J1310DH
J1310D
4
3
2
1
E
MT31
3
2
1
1
2
3
4
5
6
7
8
9
10
J902L
J903L
D
J152
1
2
3
4
5
6
FM2
SR4
Duplex
Feeding Fan
Sensor
3 2 1
3
2
1
C
6
5
4
3
2
1
3
2
1
J701
J705
1
2
3
UN10
J163
Duplex Driver PCB
J704
J703
16
17
1
2
1
2
CL
SL
CL2
SL5
7
8
B
Duplex Feeding
Duplex Reversal
PCB29
Clutch
Solenoid
Patch
Sensor
Duplex Reversing Drive Unit
A
1
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Troubleshooting
