4-Color Spots, Monocolor Spots - Minolta CF910 Service Manual

(8) 4-Color Spots, Monocolor Spots

4-Color Spots
<Troubleshooting Procedure>
Cause Step
1
Defective 2
Developing
Unit
Defective PC 3
Drum
Defective 4
Cleaning Unit
5
Defective 6
Fusing Unit
7
1144T014AA
Check Item
Does the image problem occur
on the back side of the copy?
Is the inside of the Developing
Unit plugged with foreign mat-
ter or toner?
Is the surface of the PC Drum
dirty or scratched?
Does the Paddle turn?
Is the Toner Antispill Seal
warped or deteriorated?
Is the Fusing Roller dirty or
deteriorated?
Is the Cleaning Roller dirty or
deteriorated?
T-67
Monocolor Spots
1144T015AA
Result Action
YES Go to step 7.
YES Remove the foreign mat-
ter. If the problem recurs,
change the developer.
("Developer" and "Grada-
tion Adjust")
YES Change the PC Drum.
Change the Cleaning Blade
if necessary.
("AIDC Mode/AIDC Offset"
and "Gradation Adjust")
NO A. Check the wiring
between PWB-I and
M15.
B. Check the M15 drive for
possible overload, and
if it is free of overload,
change M15.
C. Check the drive belt for
proper engagement.
YES Change the Toner Antispill
Seal.
YES Clean or replace it.
YES Clean or replace it.