Service manual

COPYRIGHT © 1999 CANON INC. CANON GP160 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 13 TROUBLESHOOTING
13-33
12 The “Add paper” indicator does not go out (multifeeder)
Cause
Multifeeder
paper supply
sensor flag
Faulty connec-
tor contact
Sensor PCB
DC controller
PCB
Steps
1
2
3
Yes/No
NO
NO
YES
NO
Action
Repair the multifeeder
paper supply sensor
flag.
Reconnect the connec-
tors properly.
End
Replace the DC con-
troller PCB.
Checks
Is the multifeeder paper supply sen-
sor flag operating properly?
Is the cable between connector J309
on the DC controller PCB and con-
nector J501 on the sensor PCB
properly connected?
Is the trouble resolved when the sen-
sor PCB is replaced?
13 JAM indicator does not go out
Cause
Sensor flag
Sensor check
DC controller
PCB (feeder
controller PCB)
Steps
1
2
Yes/No
YES
NO
YES
Action
Repair the sensor. If it
is damaged, replace it.
Replace the faulty sen-
sor.
Replace the DC con-
troller PCB or the feed-
er controller PCB.
Checks
Are the jam detection sensors below
out of alignment or damaged?
• Pick-up sensor (PS303)
• Registration sensor (PS302)
• Leading edge sensor (PS301)
• Delivery sensor (PS304)
Check each sensor according to the
directions on page 13-127. Are they
normal?
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