Ricoh VT3500, Service Manual

Page: 99 / 330

5.5 CIRCUIT
Component
Name
In/Out Main PCB Description
CN No. Signal Level
Printing
Pressure
Sensor [A] In 104-5 Activated when the sensor is
interrupted.
Print Counter [B] Out 103-3 Activated when the counter is
energized.
Printing
Pressure SOL
[C] Out 103-7 Activated when the sensor is energized.
Paper Feed
SOL [D] Out 103-8 Activated when the sensor is energized.
T1: When printing pressure is applied and the printing pressure sensor is not
interrupted, the print counter signal is applied for 100 milliseconds to
increase the total counter and decrease the counter on the operation
panel.
T2: When the printing pressure sensor is not interrupted and the copy
counter on the operation panel indicates "0", the paper feed solenoid and
the printing pressure solenoid turn off to stop paper feeding and to
release printing pressure.
-28
-3
-24
-7
-23
-8
FU101
24V
C
SOL
SOL
2A
CN103
CN104
3
1
2
-3
-5
-4
5V
GND
[A]
[B]
[C]
[D]
Main PCB
5msec
7.5V
0V
24V
0V
24V
0V
24V
0V
T1 T2
2nd Drum Position Sensor
Printing Pressure Solenoid
Printing Pressure Sensor
Print Counter
1 December 1993
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