Canon IR5000 - iR B/W Laser, Service Manual

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CANON iR5000/iR6000 REV.0 JULY 2000 2000 2000 2000 2000 COPYRIGHT © 2000 CANON INC.
CHAPTER 4 TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS
4-16 T
3.18 The print has a blurred image
Reader unit
1) Does the problem occur only in copy images?
YES: Go to step 2).
NO:
Go to step 5).
Scanner drive cable
2) While the scanner is moving, is the cable wound on the cable pulley in
lengths laid on top of one another?
YES:
1.
Route the cable once again.
2. If the cable has a fault, replace it.
Scanner drive belt
3) Is the belt too taut or too slack?
YES:
1.
Attach the belt properly.
2. If the belt has a fault, replace it.
Scanner rail
4) Move the No. 1 mirror base slowly by hand. Does it move smoothly?
YES: Check the each mirror to see if it is free of wobbling.
NO:
Clean the surface of the scanner rail, and apply a small amount of
silicone oil so that the No. 1 mirror base moves smoothly.
Photosensitive drum
5) Does the problem occur at intervals of about 250 mm?
YES:
1.
Check the drum gear.
2. Check the ends of the drum (in contact with the developing rolls)
for scratches and protrusions.
Drum drive gear
6) Does the problem occur at intervals of about 3 mm?
YES: Check the drum drive gear.
Developing gear
7) Does the problem occur at intervals of about 2.5 mm?
YES:
1.
Check the developing assembly.
2. Check to find out if the end of the drum is coated with toner; if so,
clear it.
Drum drive system
8) Does the problem occur at intervals of about 10 mm?
YES: Check the cleaner assembly and the drum drive system.
Laser scanner unit
9) Is the problem noted at intervals of about 0.5 mm?
YES: Check the laser scanner unit. (The polygon mirror may be faulty.)
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