Ricoh FACSIMILE FAX77 Field Service Manual page 177

CN2 - Video Signal Test Points
Pin
Name Function
1 XVIDEO Analog video
2 VIDADJ Video adjustment signal
3 5LYNSC Line sync (factory use)
4 COM1 Ground
CN3 - ADF Clutch
Pin Name Function
1 5TXCLU Drive signal (active L)
2 + 24VA Power
CN4 - Tx Motor
Pin
Name Function
1
OUTBB Stepper motor drive phase 1
2 OUTB Stepper motor drive phase 1
3 OUTAA Stepper motor drive phase 0
4 OUTA Stepper motor drive phase 0
CN5 - Not used
CN6 - Cutter
V Pin
1 1DCMT0 Cutter motor drive
0
2 2 1DCMT1 Cutter motor drive
0 3
4
0
CN7 - Thermal Head
V Pin
24 1 THMOD Not connected
24
2 1PRDAT Data signal (Black = H)
3 5THLAT Latch signal (active L)
4
5
6
V
7
8
9
10
11
CN8 - Xenon Lamp Driver
Pin
1 5XLMPON Lamp drive (L = On)
2
7-3
Name Function
5SB7 SB-7 status (Standby = L) 0
COM1 Ground
Name Function
PRCK Data transfer clock
5STB0 Strobe signal
5STB1 Strobe signal
5STB2 Strobe signal
5STB3 Strobe signal
COM1 Ground
+ 5V Supply to thermal head
THSEN Thermistor output
Name Function
+ 24VA Power for lamp
V
1
1
0
V
5
5
5
5
5
5
5
0
5
V
0
24