Electrical Component Defects; Sensors - Ricoh G190 Service Manual

Electrical Component Defects

4.4 ELECTRICAL COMPONENT DEFECTS

4.4.1 SENSORS

Sensor Name/
No.
Sensor Board Name
Color Drum Gear
1
Position Sensor
Black Drum Gear
2
Position Sensor
Toner End Sensor (K)
Toner End Sensor (M)
3
Toner End Sensor (C)
Toner End Sensor (Y)
Transfer Belt Contact
4
Sensor
Transfer Roller
5
Contact Sensor
TD Sensor (K)
TD Sensor (M)
6
TD Sensor (C)
TD Sensor (Y)
8 Transfer Belt Rotation
G190
CN No./
Active
Pin No.
H CN222/2
H CN222/5
CN222/8
CN230/13
L
CN230/26
CN230/29
H CN222/11
L CN222/14
CN222/20
CN225/4
A
CN230/4
CN230/20
L CN222/27
4-54
Condition Symptom
Open
SC380
Shorted
Open
SC380
Shorted
Toner end cannot be
Open
detected.
Toner end is detected
Shorted even if there is
enough toner.
Open
SC442
Shorted
Open
SC452
Shorted
Open SC368 (K)
SC369 (M)
SC370 (C)
Shorted
SC371 (Y)
Open Automatic line
position adjustment
error: Transfer belt
Shorted
unit speed cannot be
detected, causing
SM