Service manual

COPYRIGHT © 1999 CANON INC. CANON GP160 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 13 TROUBLESHOOTING
13-30
6 Registration roller does not rotate
Cause
Connector con-
nection
Registration
clutch (CL302)
DC controller
PCB
Steps
1
2
3
Yes/No
NO
YES
NO
Action
If the trouble is a faulty
connection, reconnect
the connector.
End
Replace the DC con-
troller PCB.
Checks
Check the wiring from connector
J307 to the registration clutch
(CL302)
Is the trouble resolved when the
registration clutch (CL302) is
replaced?
7 Scanner does not move forward
Cause
Scanner drive
wire
Foreign object
in the scanner
drive path
Poor connector
contact
Scanner motor
Image proces-
sor PCB
Steps
1
2
3
4
Yes/No
NO
NO
NO
YES
NO
Action
Attach the wire proper-
ly.
Check that there is no
dirt or debris on the
scanner rail surface
and that nothing is
touching the scanner.
If the trouble is caused
by a faulty connection,
reconnect the connec-
tor.
End
Replace the image
processor PCB.
Checks
Is the scanner drive wire properly
attached?
Is there any dirt on the scanner rail?
Does it operate smoothly?
Check the wiring from connector
J214 on the image processor PCB to
the scanner motor. Is it normal?
Is the trouble resolved when the
scanner motor is replaced?
8 Scanning lamp does not illuminate
Cause
Scanning lamp
Inverter PCB
connector
Image proces-
sor PCB con-
nector
Inverter PCB
Image proces-
sor PCB
Steps
1
2
3
4
Yes/No
YES
NO
NO
YES
NO
Action
End
Connect firmly.
Connect firmly.
End
Replace the image
processor PCB.
Checks
Is the trouble resolved when the
scanning lamp is replaced?
Are the connections of CN1 and
CN2 on the image processor PCB
secure?
Is connector J207 on the image
processor PCB properly connected?
Is the trouble resolved when the
inverter PCB is replaced?
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