Ricoh FT6645 Manual page 361

12 April 1993
SC352 - Incomplete TD sensor initial setting
Definition: [level: C]
The output voltage of the TD sensor is higher than 2.6 V or lower than 2.4 V
during the developer initial setting mode.
V to get 2.5 V for the TD sensor output is higher than 10 V or lower than
OUT
2 V.
Possible causes:
•
Connector [A] not set correctly
•
Toner density sensor defective
•
Abnormal toner concentration
SC353 - Abnormal Vsp Detection (Vsp ≥ 2.5 V: lighter pattern)
Definition: [level: C]
Vsp is 2.5 V or higher.
Possible causes:
•
ID sensor defective
•
OPC drum
•
High voltage control board defective
•
Poor contact of the development bias terminal
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
SERVICE CALL CONDITIONS
[A]
6-9