Ricoh Aficio SP C440DN

Electrical Component Defects
Sensors
No.
Sensor Name/
Sensor Board Name
Active
CN No./
Pin No.
Condition Symptom
1
Drum Phase Sensor
(CMY)
H CN108/2
Open
SC381
Shorted
2
Drum Phase Sensor
(K)
H CN107/2
Open
SC380
Shorted
3
Toner End Sensor (K)
Toner End Sensor (M)
Toner End Sensor (C)
Toner End Sensor (Y)
L
CN115/18
CN115/21
CN115/24
CN115/27
Open Toner end cannot be
detected.
Shorted
Toner end is detected.
4
Transfer Belt Contact
Sensor
L CN128/21
Open
SC442
Shorted
5
Paper Transfer Roller
Contact Sensor
L CN128/8
Open
SC452
Shorted
6
TD Sensor (K)
TD Sensor (M)
TD Sensor (C)
TD Sensor (Y)
A
CN108/19
CN109/17
CN108/8
CN109/25
Open SC372 (K)
SC373 (M)
SC374 (C)
SC375 (Y)
Shorted
7 ITB Rotation Sensor A CN128/18
Open • Automatic line
position adjustment
error: Transfer belt
unit speed cannot
be detected,
causing image
skew.
• SC285
Shorted
6. Troubleshooting
628