White Bands In The Fd And Cd - Minolta CF910 Service Manual

(4) White Bands in the FD and CD

White Bands in the FD
<Troubleshooting Procedure>
Cause Step
1
Defective IR 2
3
4
Defective PH 5
6
Defective PC 7
Drum
Defective PC 8
Drum Charge
Corona
9
10
Others 11
Defective 12
Image Trans-
fer Corona
1144T007AA
Check Item
Does the image problem occur
in the FD?
Is the shading sheet dirty?
Are the lens, mirror, and Origi-
nal Glass dirty?
Are the connectors on PWB-A,
-B, and -C connected prop-
erly?
Is the window of the PH Lower
Unit dirty?
Is there foreign matter
between the PH and PC
Drum?
Is the surface of the PC Drum
dirty or scratched?
Are the Corona Wire, Meshes
and Pre-Cleaner Charge
Corona dirty or deteriorated?
Is the Ozone Filter dirty?
Does M5 turn properly?
Is the Auxiliary Erase Lamp
dirty or deteriorated?
Is the Image Transfer Corona
dirty or deteriorated?
T-59
White Bands in the CD
1144T008AA
Result Action
NO Go to step 15.
YES Clean the sheet.
YES Clean these surfaces.
NO Reconnect the connectors.
YES Clean the window.
("Gradation Adjust")
YES Remove the foreign matter.
YES Change the PC Drum.
Change the Cleaning Blade
if necessary. ("AIDC Mode/
AIDC Offset" and "Grada-
tion Adjust")
YES Clean or change the
Corona Wire, Meshes and
Pre-Cleaner Charge
Corona.
YES Change the filter.
NO Check the wiring between
PWB-I and M5, and if it is
intact, change M5.
YES Clean or replace the Auxil-
iary Erase Lamp.
YES Clean or change the Image
Transfer Corona.