The Print Is Foggy (Horizontally); The Print Has Poor Sharpness - Canon iR5000 Service Manual

CHAPTER 4 TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS

3.19 The print is foggy (horizontally)

1) Make a copy in Direct. Does the problem occur in the same position?
YES: Go to step 3).
Reader unit
2) Does the scanning lamp flicker while the scanner is moving forward?
YES: Check the scanning lamp and the inverter PCB.
NO:
Scanner, Feeding system (wobbling)
3) Make a reduced copy, and compare it against a copy made in Direct. Is
the position of the problem different?
NO:
YES: Check the feeding system.

3.20 The print has poor sharpness

Reader assembly
1) Does the problem occur only in copy mages?
YES: Go to step 2).
NO:
Copyboard glass
2) Is the copyboard glass coated with oil?
YES: Clean the copyboard glass.
Mirrors
3) Is the horizontal reproduction on in copies made in Direct within stan-
dards?
NO:
YES: Clean the scanning lamp, reflecting plate, mirrors, and lens.
Dust-proofing glass, Photosensitive drum
4) Clean the durst-proofing glass. Is the problem corrected?
YES: End.
Sharpness
5) Try changing the level of sharpness in service mode. Is the problem cor-
rected?
COPIER>OPTION>BODY>SHARP (A lager setting increases the sharp-
YES: End.
NO:
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Check the scanner drive system of the reader unit.
Check the scanner.
Go to step 4).
Adjust the distance between No. 1 mirror and No. 2 mirror.
ness.)
Replace the photosensitive drum.
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