Kyocera TASKalfa 2551ci, Service Manual

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2NP
2-3-41
Connector Pin Signal I/O Voltage Description
YC1
1 5V0 O 5 V DC 5 V DC power output to OPWB2
Connected to
operation
panel PWB
sub 2 NC - - Not used
3 INT_POWER
KEY_N I
0/3.3 V DC
Power key: On/Off
4 GND - - Ground
5 KEY6 I
0/3.3 V DC (pulse) Operation panel key scan return signal 6
6 NC - - Not used
7 LED3 O
0/3.3 V DC (pulse) Operation panel LED display drive
signal 3
8 NC - - Not used
9 KEY5 I
0/3.3 V DC (pulse) Operation panel key scan return signal 5
10 KEY4 I
0/3.3 V DC (pulse) Operation panel key scan return signal 4
11 SCAN4 O
0/3.3 V DC (pulse) Scan signal 4
12 SCAN2 O
0/3.3 V DC (pulse) Scan signal 2
13 GND - - Ground
14 SCAN3 O
0/3.3 V DC (pulse) Scan signal 3
15 SCAN1 O
0/3.3 V DC (pulse) Scan signal 1
16 NC - - Not used
17 LED0 O
0/3.3 V DC (pulse) Operation panel LED display drive
signal 0
18 LED1 O
0/3.3 V DC (pulse) Operation panel LED display drive
signal 1
19 LED2 O
0/3.3 V DC (pulse) Operation panel LED display drive
signal 2
20 NC - - Not used
21 KEY0 I
0/3.3 V DC (pulse) Operation panel key scan return signal 0
22 KEY1 I
0/3.3 V DC (pulse) Operation panel key scan return signal 1
23 KEY2 I
0/3.3 V DC (pulse) Operation panel key scan return signal 2
24 SCAN0 O
0/3.3 V DC (pulse) Scan signal 0
25 KEY3 I
0/3.3 V DC (pulse) Operation panel key scan return signal 3
26 GND - - Ground
27 ATTENTION O
0/3.3 V DC
Attention LED control signal
28 MEMORY O
0/3.3 V DC
Memory LED control signal
29 PROCESSIN
G O
0/3.3 V DC
Processing LED control signal
30 JOB_LED O
0/3.3 V DC
JOBLED control signal
YC3
1 VO2 O Analog Speaker sound signal (+)
Connected to
speaker 2 VO1 O Analog Speaker sound signal (-)