Canon GP335 Service Manual page 513
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Also See for GP335:
- Installation instructions (4 pages) ,
- Service manual (682 pages) ,
- Service handbook (200 pages)
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44
The scanner fails to move forward/in reverse.
Cause
Scanner drive
cable
Scanner path
Connector
Scanner motor
(M3)
DC controller
PCB
45
The pre-exposure lamp fails to turn on.
Cause
Pre-exposure
lamp
DC controller
PCB
COPYRIGHT © 1999 CANON INC. CANON 405/335 REV.0 JAN. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Step
Check
1
Is the scanner drive cable routed
correctly?
2
Is the scanner rail free of dirt, and
does the scanner move smoothly?
3
Is the wiring/connection from the
connector J116 on the DC
controller PCB to the scanner
motor through the relay connector
J28 normal?
4
Replace the scanner motor. Is the
problem corrected?
Step
Check
1
Does the setting of I/O>DC-
CON>P005-bit1 change from ''0' to
'1' as soon as the pre-exposure lamp
turns on? (J112-A2: PED) The
resistance of the pre-exposure lamp
is about 25 to 30 Ω
CHAPTER 14 TROUBLESHOOTING
Yes/No
NO
Correct the routing.
YES
Check the scanner rail
for dirt, foreign matter,
and any other which
may come into contact
with the scanner.
NO
Correct the wiring/
connection.
YES
End.
NO
Replace the DC
controller PCB.
Yes/No
YES
End.
NO
Replace the DC
controller PCB.
Action
Action
14-95
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Chapters
Troubleshooting
