Service manual

COPYRIGHT © 1999 CANON INC. CANON GP160 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 13 TROUBLESHOOTING
13-25
14 Blurring
Cause
Scanner wire
Scanner rail
Cartridge
Printer unit
main drive
assembly
Check connec-
tor connection
(between the
laser scanner
unit and the DC
controller PCB)
Laser scanner
unit
DC controller
PCB
Steps
1
2
3
4
5
6
Yes/No
YES
NO
YES
YES
NO
YES
NO
Action
1. Reattach the wire.
2. Replace the wire.
Clean the scanner rail
with alcohol. Then
apply a small amount of
lubricant.
End
Replace the gear.
Reconnect the connec-
tor.
End
Replace the DC con-
troller PCB.
Checks
Is trouble occurring due to twisting or
fraying of the wire that is wound onto
the wire pulley while the scanner is
moving?
Gently move mirror1 mount manual-
ly. Does it move smoothly?
Is the trouble resolved when the car-
tridge is replaced?
Is slipping or fracturing occurring
due to gear wear of the printer unit
main drive assembly?
Check the connection of connector
J304 on the DC controller PCB and
the laser scanner unit. Is the connec-
tor firmly connected?
Is the trouble resolved when the
laser scanner unit is replaced?
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