Service manual

FO-4400U
FO-CS1
[3] Point- to-point diagram and connector signal name (1)
4 – 3
CNSTP1
VSTP
/STPON
VSTP
/STPON
1
2
1
2
CNSP1
SP+
SP–
SP+
SP–
1
2
1
2
CNSEN1
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
/FRTS
DG
/ORGS
DG
/B4FRS
DG
ROLSNS
DG
/FRTS
DG
/ORGS
DG
/B4FRS
DG
ROLSNS
DG
CNCIS1
1
2
3
4
5
6
7
8
9
10
1
2
3
4
5
6
7
8
9
10
SIG
GND
VDD
GND
GND
SI
GND
CLK
GLED
VLED
SIG
GND
VDD
GND
GND
SI
GND
CLK
GLED
VLED
CNTXM1
1
2
3
4
1
2
3
4
TMA
/TMA
TMB
/TMB
TMA
/TMA
TMB
/TMB
LIU PWB
CNLIUCNLIU1
RXIN
TXOUT
CI
/EXHS
DPON
CML
+5V
DG
+24VA
RXIN
TXOUT
CI
EXHS
DPON
CML
+5V
DG
+24VA
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
OPERATION
PANEL
PWB
CNPN1
CNPNA
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
GND
GND
PLTSW
LEDEN1
SEN7
LD5
SEN6
LD4
SEN5
LD3
SEN4
LD2
SEN3
LD1
SEN2
LD0
SEN1
LEDEN2
SEN0
TH1
+5V
TH2(GND)
/BKLON
GND
E
LD7
RS
LD6
GND
GND
PLTSW
LEDEN1
SEN7
LD5
SEN6
LD4
SEN5
LD3
SEN4
LD2
SEN3
LD1
SEN2
LD0
SEN1
LEDEN2
SEN0
TH1
+5V
TH2(GND)
/BKLON
GND
E
LD7
RS
LD6
COG
(LCD)
CN6
+24V
GND
/MOTOR REM
/MOTOR LOCK
N.C.
MOTOR LOW
M1
MAIN
MOTOR
1
2
3
4
5
6
M2
COOLING
FAN MOTOR
CN13
1
2
3
4
GND(DG)
/FAN REM
FAN LOCK
/FAN CNT
POWER
SUPPLY
PWB
PRINTER
CONTROL
PWB
CN10
/PS1
GND(DG)
1
2
CN14
+5V
TONER LEVEL
/TONERLED REM
GND(DG)
PWB-G
TONER
EMPTY
SENSOR
PS1
PAPER TAKE-UP
SENSOR
PS5A RECEIVED
DOCUMENT
TRAY SENSOR
PS5B
PAPER SIZE SENSOR
1
2
3
4
CN7
CN1
+24V MAIN
GND(MG)
GND(DG)
GND(DG)
+5V MAIN
+5V MAIN
/FUSER LAMP
/FUSER RL
+24V MAIN
GND(MG)
GND(DG)
GND(DG)
+5V MAIN
+5V MAIN
HEATER ON
HEATER-RELAY OFF
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
CN1
M2
POLYGON
MOTOR
CN9
1
2
3
4
5
+24V
GND(MG)
/POLYGON.M.REM
/POLYGON.M.LCCK
/POLYGON.M.CLK
PWB-D
LASER DIODE
DRIVE PWB
CN5
1
2
3
4
5
6
7
8
8
7
6
5
4
3
2
1
/SOS
+5V
LD POWER LOW
/LD EN
/SH,N
GND(DG)
/L DATA
+5V
/SOS
+5V
LD POWER LOW
/LD EN
/SH,N
GND(DG)
/L DATA
+5V
HV1
HIGH VOLTAGE
PWB UNIT
CN4
CN1
CN1
1
2
3
4
5
6
7
8
9
10
10
9
8
7
6
5
4
3
2
1
+5V
CH LREM
T VR
T MON V
T MON I
B VR
C REM
C MON
GND(MG)
+24V
+5V
CH LREM
T VR
T MON V
T MON I
B VR
C REM
C MON
GND(MG)
+24V
SL1
PAPER TAKE-UP SOLENOID
2ND
PAPER
CASSETTE
PWB
CN11
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
+24V
/FEED2
/FEED3
+5V
GND(DG)
2ND/3RD SIZE
2ND/3RD SET
/UNIT
2ND/3RD EMP CHECK2
/2ND,3RD
/M3 ON
M3 CLK
CHECK0
CHECK1
+24V
/FEED2
/FEED3
+5V
GND(DG)
2ND/3RD SIZE
2ND/3RD SET
/UNIT
2ND/3RD EMP
CHECK2
/2ND,3RD
/M3 ON
M3 CLK
CHECK0
CHECK1
CN3
1
2
+24V
/FEED1
PS3
PAPER EXIT SENSOR
CN8
1
2
3
PS3 AN
GND(DG)
PS3
PS4
PAPER OUT SENSOR
CN12
1
2
3
4
5
/PS4
GND(DG)
P EMP1 AN
GND(DG)
/P EMP1
CN2
CN3
TS1
THERMOSTAT
1
2
3
HEATER N
N.C.
HEATER L
H1 HEATER LAMP
1
2
TH1
THERMISTER
THERMISTER
+5V
THERMISTER
+5V
1
2
CN2
S2
INTERLOCK SWITCH
1
2
+24V SUB
+24V MAIN
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
9
10
11
12
CN5 CNPW1
GND(DG)
GND(DG)
GND(DG)
GND(DG)
GND(DG)
/RESET
GND(DG)
GND(DG)
GND(DG)
/HSYNC
/EPRDY
/PRRDY
/TOD
/ETBSY
/STS
/CMD
/CTBSY
/PRINT
/SRCLK
GND(DG)
GND(DG)
/VIDEO
+5V
GND(DG)
+5V
GND(DG)
+5V
/CPRDY
+5V
/TEST
GND(DG)
GND(DG)
GND(DG)
GND(DG)
GND(DG)
/RESET
GND(DG)
GND(DG)
GND(DG)
/HSYNC
/EPRDY
/PRRDY
/TOD
/ETBSY
/STS
/CMD
/CTBSY
/PRINT
/SRCLK
GND(DG)
GND(DG)
/VIDEO
+5V
GND(DG)
+5V
GND(DG)
+5V
/CPRDY
+5V
/TEST
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
CNPRT1
CNAC
1
2
3
AC-L
FG
AC-N
AC
CORD
CN15
TRAY OPEN
GND(DG)
GND(DG)
MP SIZE
1
2
3
4
+24V SUB
MG
MG
MG
+24V MAIN
+24V MAIN
+5V SUB
DG
DG
DG
+5V MAIN
+5V MAIN
+24V SUB
MG
MG
MG
+24V MAIN
+24V MAIN
+5V SUB
DG
DG
DG
+5V MAIN
+5V MAIN
DOCUMENT
SENSOR
FRONT
SENSOR
B4 FRONT
SENSOR (N.M.)
TRANSFER
SENSOR
CIS
UNIT
SPEAKER
TX MOTOR
VERIFICATION
STAMP
OPTION
FO-45VS
CONTROL PWB
(1/2)
PE1
PAPER EMPTY SENSOR
OPTION
FO-CS1
PH
PRINT HEAD
UNIT