COPYRIGHT © 1998 CANON INC. CANON PC400/420/430,FC200/220 REV.0 JAN.1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
10-22
CHAPTER 10 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).
