
3–12
TROUBLESHOOTING IMAGE PROBLEMS
10
The copy has white spots. (horizontal)
Cause
Developing
assembly
Developing
assembly
Drum unit
Copy paper
Transfer charg-
ing assembly
Developing
bias
Scanning sys-
tem rail,
Scanner cable
Step
1
2
3
4
5
6
Checks
Execute ‘L-TEST’ in service
mode (*4*). Are there white
spots in the images?
Is the problem noted at inter-
vals of about 35 mm?
Is the problem noted at inter-
vals of about 94 mm?
Try fresh copy paper. Is the
problem corrected?
Are there white spots on the
photosensitive drum during
copying?
Is the problem noted at the
same location on every copy?
Yes/No
YES
YES
YES
YES
NO
YES
YES
Action
Go to step 4.
1. Clean the developing rolls.
2. Dry wipe the surface of the
developing cylinder.
3. If scratches are found on the
surface of the developing
cylinder, replace the
developing cylinder.
1. Clean the drum.
2. If there are scratches on the
drum, replace the drum unit.
The copy paper is moist;
advise the user on the correct
method of storing paper.
Check the transfer charging
assembly for leakage.
Check the developing bias.
1. Check the scanner rail for
foreign matter.
2. Adjust the tension of the
scanner cable.
Summary of Contents for GP215
Page 4: ......
Page 36: ......
Page 38: ...3 2 TROUBLESHOOTING IMAGE PROBLEMS ...
Page 39: ...3 3 TROUBLESHOOTING IMAGE PROBLEMS ...
Page 40: ...3 4 B Image Fault Samples ...
Page 80: ......
Page 92: ...6 6 ARRANGEMENT AND FUNCTIONS OF ELECTRICAL PARTS C Fans Figure 6 603 FM6 FM5 FM2 FM3 FM1 FM4 ...
Page 105: ...6 19 ARRANGEMENT AND FUNCTIONS OF ELECTRICAL PARTS 3 Composite Power Supply PCB Figure 6 610 ...
Page 204: ...C GENERAL CIRCUIT DIAGRAM General Circuit Diagram 1 4 A 3 ...
Page 205: ...General Circuit Diagram 2 4 A 4 ...
Page 206: ...General Circuit Diagram 3 4 A 5 ...
Page 207: ...General Circuit Diagram 4 4 A 6 ...