Ricoh FACSIMILE FAX77 - Xenon Lamp Driver; Psu

CN3 - Document (SB-1), Trailing Edge (SB-0),
and Scan Line Sensors (SB-2)
Fin Name Function
V
1
5SB2 SB-2 output (L: Paper present) 5
2
3
4
5
6
7
8
9
10
+ 5V supply 1
COM Ground
0
5SB0 SB-0 output (L: Paper present) 0
+ 5V supply
1
COM Ground
0
5SB1 SB-1 output (L: Paper present) 5
+ 5V supply
1
COM Ground
0
N.C. Not connected
6. Xenon Lamp Driver
CN1 - FCU
See FCU CN8. The pin numbers are
reversed.
CN2 - Xenon Lamp
Pin Name Function V
1
COM Ground
-29
2 OUT3 Drive signal 0
3
N.C. Not connected
4 OUT2 Drive signal 1
5 OUT1 Drive signal
1
7. PSU
CN51 - Thermal Head
Pin Name
Function V
1 + 24VA Power to T. Head 24
2
+ 24VA Power to T. Head 24
3 GND Ground
0
4
GND Ground 0
CN52 - FCU
See FCU CN12.
Note: The pin numbers have been reversed.
7-8