Canon PC400, Руководство по обслуживанию

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CHAPTER 3 IMAGE TROUBLESHOOTING
18. The copy has a blurred image.
Cause Step Checks YES/NO Remedies
Copyboard rail 1 Is the movement of the copy-
board rail smooth? NO Replace the copyboard
rail.
Copyboard drive
assembly 2 Is the movement of the copy-
board normal? NO Check the copyboard drive
assembly; if a fault is
found, replace the part.
Main motor assembly 3 Is the main motor assembly
normal? NO Replace the main motor
assembly.
Feeding assembly 4 Does the copy paper stop or
jump near the transfer assem-
bly? YES Remove the foreign matter
or burrs from the feeding
system.
Cartridge NO Replace the cartridge.
Cause Step Checks YES/NO Remedies
Scanning lamp 1 Does the scanning lamp flicker? YES Replace the scanning
lamp unit.
Cartridge 2 Replace the cartridge.
Is the problem corrected? YES End.
High-voltage
transformer Check the high-voltage
transformer (DC controller/
DC power supply PCB).
NO
Cause Step Checks YES/NO Remedies
Document
1 Does the copy have an image
which is too light at the same
time? YES Correct the light image
first.
2 Is there a gap between the
document and the copyboard
glass? YES • Check the copyboard
glass to make sure it is
not warped.
• Advise the user how to
place documents cor-
rectly.
Lens 3 Is the lens off contact? YES Push the lens into place
while taking great care not
to scratch it.
Scanner 4 Clean the scanning lamp,
reflecting plate, and lens.
Is the problem corrected? YES End.
Cartridge NO Replace the cartridge.
19. The copy is foggy (cross feed direction).
20. The copy has poor sharpness (focus).