1 October, 1999
SERVICE CALL CONDITIONS
7-3
Trouble-
shooting
SC324: LD drive current over
Definition: [B]
The LD drive board applies more than 100 mA to the LD.
Possible causes:
•
LD unit defective (not enough power, due to aging)
•
Poor connection between the LD unit and the engine board
•
Engine board defective
SC390: TD sensor error
Definition: [B]
The TD sensor outputs less than 0.5V or more than 4.0V 10 consecutively
during printing.
Possible causes:
•
TD sensor abnormal
•
Poor connection of the PCU
SC391: Development bias leak
Definition: [B]
A development bias leak signal is detected.
Possible causes:
•
Poor connection of the PCU
•
High voltage supply board defective
SC392: TD sensor initial setting error
Definition: [B]
TD sensor output voltage falls out of the adjustment range after the TD sensor
initial setting has been finished.
Possible causes:
•
The toner seal of the PCU was not removed
•
ID sensor defective
•
TD sensor abnormal
•
The Drum is not turning
•
Development roller does not turn
•
Poor connection of the PCU
