Ricoh FT6645 Manual page 363

12 April 1993
SC361 - Incomplete drum potential sensor calibration
Definition: [level: C]
When the process control initial setting is performed and a development bias
of -100 V or -800 V is applied to the drum shaft, the drum potential voltage is
out of these ranges:
0.1 ≤ V-100 ≤ 0.7 [V] or 2.7 ≤ V-800 ≤ 4.2 [V].
Possible causes:
•
Drum potential sensor defective
•
High voltage control board defective
•
Drum shaft terminal not grounded
•
OPC drum
•
Main charge corona unit defective
SC364 - Abnormal V
Definition: [level: C]
V is out of specification (V
D
Possible causes:
•
Drum potential sensor defective
•
OPC drum
•
Main charge corona unit defective
SC365 - Abnormal V
Definition: [level: C]
V is out of specification (V
L
Possible causes:
•
Drum potential sensor defective
•
OPC drum
•
Main charge corona unit defective
•
Optics too dirty
detection
D
+ 770 ± 20 V).
R
detection
L
+ 140 ± 20 V).
R
6-11
SERVICE CALL CONDITIONS