
16
The copy has poor sharpness.
3–18
TROUBLESHOOTING IMAGE PROBLEMS
Cause
Copyboard
glass
Scanner (dirt)
Mirror (position)
Developing
bias
Drum unit
Transfer charg-
ing system
Step
1
2
3
4
5
6
Checks
Is a printed photo (consisting of
dots) copied in photo mode?
Is the copyboard glass stained
with oil?
Clean the scanning lamp,
reflecting plate, mirror, lens,
and dust-proofing glass. Is the
problem corrected?
Is the horizontal reproduction
ratio in Direct within the speci-
fied range?
Is the developing bias generat-
ed normally?
Replace the drum unit. Is the
problem corrected?
Yes/No
YES
YES
YES
NO
NO
YES
NO
Action
Advise the user that moire may
occur at times.
Clean the copyboard glass.
End.
Adjust the distance between
the No. 1 mirror and the No. 2
mirror.
1.
Replace the composite
power supply PCB.
2.
Replace the DC controller
PCB.
End.
Check the transfer charging
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 ...