Canon PC920 Service Manual page 342

2 Separation/Feeding Assembly
Cause Step
Copy paper 1
2
Feeding 3
assembly
Feed belt, 4
Roller
Static elimi- 5
nator
Pre-registra- 6
tion roller
paper sensor
(Q751)
Registration 7
roller
Registration-
related
spring,
Spring clutch
of registra-
tion assem-
bly
3 Fixing/Delivery Assembly
Cause Step
Inlet guide 1
Fixing lower 2
roller, Fixing
film
Delivery 3
paper detect-
ing lever
Delivery 4
sensor (PS3)
Delivery 5
roller drive
assembly
Leading
edge margin
COPYRIGHT © 1999 CANON INC.
Checks
Try paper recommended by Canon. Is
the problem corrected?
Is the copy paper curled, wavy, or
otherwise deformed?
Is there foreign matter in the feeding
assembly?
Is the feed belt rotating properly?
Is the static eliminator soiled with
toner or the like?
Does the pre-registration roller paper
sensor operate normally?
Is the registration roller worn, de-
formed, or soiled?
Checks
Is the fixing inlet guide soiled with
toner?
Is the fixing lower roller or the fixing
film deformed or scratched?
Does the delivery detecting lever
move smoothly?
Does the delivery sensor operate
normally?
Does the delivery roller operate
smoothly?
CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 11 TROUBLESHOOTING
YES/NO
YES Ask the user to use
recommended paper.
YES Replace the paper.
YES Instruct the user on the
correct method of
storing paper.
NO Remove the foreign
matter.
YES Check the belt and the
roller.
NO Replace the sensor or
the lever.
YES Clean the static
eliminator.
If dirt is found, clean
with alcohol; if wear
or deformation is
found, replace it.
NO 1. Check the spring
used to control
registration.
2. Check the spring
clutch of the regis-
tration assembly.
YES/NO
YES Clean the guide with
solvent.
YES Replace the roller or
the fixing assembly
upper unit.
NO Make adjustments so
that it moves
smoothly.
NO Replace the sensor.
NO Check the delivery
roller drive assembly.
YES Check the leading
edge of copy paper for
margin.
Action
Action
11-77