Ricoh C211 Service Manual page 483

4. Circuit
Printing Pressure Sensor
+!5V
CN 104-4
CN104-7 CNI02-1
( )
CN108-3 (830)
I
CN102-25
(830)
CN104-9 (830)
CN102-33
CN102-8 (GND)
CN104-2O
CN1 02-4 (GND)
(830)
(830) CN104-6b
A
CN104-2
(830)
CN102-31( )
w
CN104-31
(830)
Main Board
I
J
5. Input/Output
Copy Counter
Paper Feed SOL
Printing Pressure SOL
Signal Name
1/0 Main Control PCB Description
CN
No. Level
Printing
I CN 102-25
"v~~
When the ressure is applied (sensor
Pressure
OFF) CNI 82-25 becomes OV.
Printing Pres-
0 cN'02-31
24V
1- ,V
<
When the printing pressure solenoid
sure Solenoid
is ON, CN 102-31 becomes OV.
6. Electrical Timing
2nd Drum Position Sensor
Paper Feed Solenoid
I
m
Pressure Detecting Sensor
Print Counter
TI : When the printing pressure is applied and the printin?l pressure sensor is not inter-
rupted, the print counter signal is applied for 100 milliseconds to increase the copy
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 "O", the paper feed solenoid and the printing pressure
solenoid turn off to stop paper feeding and to release the printing pressure.
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