Ricoh A220 Service Manual page 435

SERVICE CALL CONDITIONS
SC354 - Abnormal Vsg detection (Vsg ≤ 2.5 V)
Definition: [level: C]
Vsg is 2.5 V or less.
Possible causes:
•
ID sensor defective
•
OPC drum
•
Dirty charge corona casing
•
Quenching lamp defective
•
Erase lamp defective
•
Cleaning blade defective
•
Dirty ID sensor
SC355 - Abnormal V
Definition: [level: C]
V is 4 V or higher.
TD
Possible causes:
•
Toner density sensor defective
•
Toner concentration too low
SC356 - Abnormal V
Definition: [level: C]
V is less than 0.5 V.
TD
Possible causes:
•
Toner density sensor defective
•
Toner concentration is too high
SC357 - Abnormal Vsp detection (Vsp/Vsg ≥ 25%)
Definition: [level: C]
Vsp/Vsg is 25% or higher.
Possible causes:
•
ID sensor defective
•
OPC drum
•
Dirty ID sensor
SC358 - Abnormal Vsp detection (Vsp/Vsg < 2.5%)
Definition: [level: C]
Vsp/Vsg is less than 2.5%.
Possible causes:
•
ID sensor defective
•
OPC drum
•
Toner scattering
detection (V
TD
detection (V
TD
6-10
≥ 4 V)
TD
< 0.5 V)
TD
15 July 1996