Minolta CF910 Service Manual page 429

<Troubleshooting Procedure>
Cause Step
Defective PC 12
Drum
13
14
Defective 15
Cleaning Unit
16
Defective 17
Paper Take-
Up/Transport
Unit
Check Item
Is the surface of the PC Drum
dirty or scratched?
Is the PC Drum grounded
properly?
Are the edges of the PC Drum
dirty?
Are the Corona Wire and
Housing dirty or deteriorated?
Is the connector on HV1 con-
nected properly?
Is the Paper in the Drawer
damp?
T-62
Result Action
YES Change the PC Drum.
Change the Cleaning Blade
as a set if necessary.
("AIDC Mode/AIDC Offset"
and "Gradation Adjust")
NO Clean or change the PC
Drum ground plate.
YES Clean the edges.
YES Clean or change the
Corona Wire and Housing.
("Gradation Adjust")
NO Reconnect the connector.
YES A. Check if the Dehumidi-
fying Heater is malfunc-
tioning.
B. Check if the Paper
Dehumidifying Switch is
on.