Panasonic FP-7742 / FP-7750 Service Manual ▷ View online
3-21
PCB Connector and
Signal Information
(CN407)
Pin
Signal
Destination
Status
Function
No.
Name
1 DRV3
Control panel 4
Key input matrix circuit
CN475-1
drive signal 3
2 DRV2
Control panel 4
Key input matrix circuit
CN475-2
drive signal 2
3 DRV1
Control panel 4
Key input matrix circuit
CN475-3
drive signal 1
4 DRV0
Control panel 4
Key input matrix circuit
CN475-4
drive signal 0
5 MTR20
Control panel 4
Key input matrix circuit
CN475-5
data signal 20
6 MTR21
Control panel 4
Key input matrix circuit
CN475-6
data signal 21
7 MTR22
Control panel 4
Key input matrix circuit
CN475-7
data signal 22
8 MTR23
Control panel 4
Key input matrix circuit
CN475-8
data signal 23
9 LDDRV2 Control panel 4
LED drive signal 2
CN475-9
10 GND
Control panel 4
0V
Ground
CN475-10
(2) Control panel 3
(CN450)
Pin
Signal
Destination
Status
Function
No.
Name
1 DRV0
Control panel
Key input matrix circuit
CPU CN406-1
drive signal 0
2 DRV1
Control panel
Key input matrix circuit
CPU CN406-2
drive signal 1
3 DRV2
Control panel
Key input matrix circuit
CPU CN406-3
drive signal 2
4 DRV3
Control panel
Key input matrix circuit
CPU CN406-4
drive signal 3
5 MTR10
Control panel
Key input matrix circuit
CPU CN406-5
data signal 10
6 MTR11
Control panel
Key input matrix circuit
CPU CN406-6
data signal 11
7 MTR12
Control panel
Key input matrix circuit
CPU CN406-7
data signal 12
8 MTR13
Control panel
Key input matrix circuit
CPU CN406-8
data signal 13
9 LDDRV0 Control panel
LED drive signal 0
CPU CN406-9
1.25 mS
Select
5V
0V
1.25 mS
Select
5V
0V
1.25 mS
Select
5V
0V
1.25 mS
Select
5V
0V
5V
0V
ON
OFF
5V
0V
ON
OFF
5V
0V
ON
OFF
5V
0V
ON
OFF
5V
0V
ON
OFF
1.25 mS
Select
5V
0V
1.25 mS
Select
5V
0V
1.25 mS
Select
5V
0V
1.25 mS
Select
5V
0V
5V
0V
ON
OFF
5V
0V
ON
OFF
5V
0V
ON
OFF
5V
0V
ON
OFF
5V
0V
ON
OFF
3-22
(CN450)
Pin
Signal
Destination
Status
Function
No.
Name
10 LDDRV1 Control panel
LED drive signal 1
CPU CN406-10
11 GND
Control panel
0V
Ground
CPU CN406-11
12 GND
Control panel
0V
Ground
CPU CN406-12
5V
0V
ON
OFF
(3) Control panel 4
(CN475)
Pin
Signal
Destination
Status
Function
No.
Name
1 DRV3
Control panel
Key input matrix circuit
CPU CN407-1
drive signal 3
2 DRV2
Control panel
Key input matrix circuit
CPU CN407-2
drive signal 2
3 DRV1
Control panel
Key input matrix circuit
CPU CN407-3
drive signal 1
4 DRV0
Control panel
Key input matrix circuit
CPU CN407-4
drive signal 0
5 MTR20
Control panel
Key input matrix circuit
CPU CN407-5
data signal 20
6 MTR21
Control panel
Key input matrix circuit
CPU CN407-6
data signal 21
7 MTR22
Control panel
Key input matrix circuit
CPU CN407-7
data signal 22
8 MTR23
Control panel
Key input matrix circuit
CPU CN407-8
data signal 23
9 LDDRV2 Control panel
LED drive signal 2
CPU CN407-9
1.25 mS
Select
5V
0V
1.25 mS
Select
5V
0V
1.25 mS
Select
5V
0V
1.25 mS
Select
5V
0V
5V
0V
ON
OFF
5V
0V
ON
OFF
5V
0V
ON
OFF
5V
0V
ON
OFF
5V
0V
ON
OFF
3-23
PCB Connector and
Signal Information
(CN475)
Pin
Signal
Destination
Status
Function
No.
Name
10 GND
Control panel
0V
Ground
CPU CN407-10
3-24
3.3 Paper Feed Driver PCB
(CN601)
Pin
Signal
Destination
Status
Function
No.
Name
1 Vp
Copier CPU
DC+24V power supply
CN4-2
2 Vp
Copier CPU
DC+24V power supply
CN4-2
3 PGND
Copier CPU
0V
Power ground
CN4-1
4 PGND
Copier CPU
0V
Power ground
CN4-1
5 F32OUT
Copier CPU
32 bit data signal
CN4-3
6 FENB
Copier CPU
Enable signal
CN4-8
7 QLTH
Copier CPU
Paper feed data latch
CN4-4
signal
8 F32CLK
Copier CPU
Transfer clock signal
CN4-5
(CN601)
Pin
Signal
Destination
Status
Function
No.
Name
9 QLD
Copier CPU
32 bit data receive
CN4-6
shift/load signal
10 —
11 QIN
Copier CPU
Paper feed input data
CN4-7
signal
12 —
13 VL
Copier CPU
DC+5V power ground
CN4-9
14 GND
Copier CPU
ground
CN4-10
0V
0V
ON
5V
Pulse
0V
5V
0V
24V
0V
24V
0V
ON
5V
Pulse
5V
0V
Pulse
5V
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