Service manual

FO-IS125N
4 – 3
[3] Point-to-point diagram
POWER SUPPLY PWB UNIT
HIGH
VOLTAGE
PWB UNIT
OPTICAL
UNIT
(LSU)
HOOK SWITCH PWB UNIT
THERMISTOR
P-IN SENSOR
SCANNER
MOTOR
SPEAKER
PRINTER
MOTOR
SOLENOID
TONER
CARTRIDGE
SENSOR
CONTROL PWB UNIT
OPERATION
PANEL
PWB UNIT
PAPER OUT
SENSOR
FAN
MOTOR
CIS
CNCIS
1
2
3
4
5
6
7
1
2
3
4
5
6
7
CNCIS
AO
GND
VDD
SI
CLK
GLED
VLED
2 MB+
CNTXM
1
MA+
3MA-
1
2
3
4
4 MB-
SP+
SP-
1
2
1MA+
2MB+
3MA-
4MB-
MA+
MB+
MA-
MB-
VFM+
CNTEL
1
2
3
4
5
CNTEL
ADG
TELOUT
TELIN
nRHS
+3.3V
1
2
3
4
5
1
2
3
4
N.C. 2
VFM- 3
1
1
2
/PIN 1
GND 2
/POUT 1
GND 2
POUT1_AN 3
CNSP
1 SP+
2 SP-
CNMM
2 N.C.
CNFM
1 VFM+
3 VFM-
CNRTH
1 RTH1
2 RTH2
CNPIN
1 /PIN
2GND
CNPOUT
1 /POUT
2GND
3 POUT1_AN
CNPW
1
2
3
4
5
6
7
8
9
10
CNPN
KEN3
1
KEN2
2
KEN1 3
KEN0 4
/ORGSNS 5
/FRSNS 6
LCDE 7
/SEN0 8
/SEN1 9
/SEN2 10
/SEN3 11
/SEN4 12
/SEN5 13
/SEN6
14
RS 15
TCON
+24V
PNLVCC
16
MCON
CNLSR
DGND 1
-S/H 2
-VIDEO 3
-LDEN 4
DGND 5
+5V 6
DGND 7
-HSYNC 8
CNPM
CLK 1
-READY 2
-START 3
GND 4
+24V 5
3
6
9
CN3
1 +24VSUB
2
MG
4
MG
5
+24VMAIN
+24VMAIN
7
DG
8DG
HEATER ON
10 ZC
CNPN
TCON
+24V
MCON
CN1
1DGND
2 -S/H
3 -VIDEO
4-LDEN
5DGND
6+5V
7DGND
8 -HSYNC
1CLK
2 -READY
3 -START
4GND
5+24V
PGND
PGND
PWMSIN
PWMSIN
/SLON 2
2
+24V 1
1
CNSL
CNLCD1
DB7
DB6
DB5
DB4
DB3(N.C.)
DB2
DB1(N.C.)
DB0(N.C.)
E
R/W
RS
VO
+3.3V
DG
1
2
3
4
5
6
7
8
9
10
11
12
13
14
CN2
11
+24VSUB
+24VMAIN
LCD UNIT
2
INTERLOCK
SWITCH
CN5
2
CN1
1
+24VMAIN
2 N.C.
3L
1
+24VMAIN
1N
2 N.C.
3+24VS
FUSING
UNIT
3L
2N.C.
3+24VS
THERMAL
FUSE-2
1N
2N.C.
ETHER NET
CNLAN
AO
GND
VDD
SI
CLK
GLED
VLED
MB+
MA+
MA-
MB-
RTH1
RTH2
/SLON
+24V
1
2
3
4
5
6
1
2
3
4
5
6
CNTNR
/TCT2
GND0
/TCT1
/TCT0
GND1
GND2
/TCT2
GND0
/TCT1
/TCT0
GND1
GND2
Ach
+24VSUB
MG
MG
+24VMAIN
+24VMAIN
DG
DG
/HLON
/ZC
V4D
17
18
19
DG
/LEDON
/LCDRES
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
KEN3
KEN2
KEN1
KEN0
ORGSNS
FRSNS
LCDE
/SEN0
/SEN1
/SEN2
/SEN3
/SEN4
/SEN5
/SEN6
RS
+3.3V
DG
LEDON
/LCDRES
ADG
TELOUT
TELIN
nRHS
+3.3V
1
2
3
4
5
1
2
3
4
5
CNHV
+24VSUB
+24VMAIN