Df Main Pwb - Kyocera DF-770 Service Manual

2-3 Operation of the PWBs

2-3-1 DF main PWB

YC6
YC4
YC9
U7
U4
Connector Pin
1
YC3
2
Connected to
machine
3
4
1
YC6
2
Connected to
the DF front
3
cover switch
and DF top
4
cover switch
YC10
U13
U14
U10
U5
U6
YC1 YC2
Figure 2-3-1 DF main PWB silk-screen diagram
Signal
GND
GND
24V1
24V1
24V1
FRONT COV SIG
TOP COV
SOURCE
TOP COV SIG
YC12
YC17
U11 U12
U9
U3
U8
U2 X1
I/O Voltage
- -
- -
I 24 V DC
I 24 V DC
O 24 V DC
I 0/24 V DC
O 0/24 V DC
I 0/24 V DC
2-3-1
YC13
U18
U19
U17
U16
U1
YC20
YC18
Description
Ground
Ground
24 V DC power input from Machine
24 V DC power input from Machine
24 V DC power outoput to DFFCSW
DFFCSW: On/Off
24 V DC power output to DFTCSW
DFTCSW: On/Off
3NC/3NB/3NK
YC14
U20
U15