
3–17
TROUBLESHOOTING IMAGE PROBLEMS
15
The copy has horizontal fogging.
Cause
Scanning lamp,
Composite
power supply
PCB
Developing
assembly
Scanner
Feeding system
Step
1
2
3
4
Checks
Is the problem noted at the
same location on all copies
made in Direct?
Does the scanning lamp flicker
while the scanner is moving
forward?
Is the coating of toner on the
surface of the developing cylin-
der normal?
Make reduced copies, and
compare them against copies
made in Direct. Is the location
of the problem different?
Yes/No
YES
YES
NO
YES
NO
Action
Go to step 4.
Check the scanning lamp,
composite power supply PCB
(lamp ON circuit), and 2.4V
power supply.
Check the developing bias.
Check the scanning system.
Check the feeding system.
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 ...