Canon CP660 Service Manual page 345

C. After executing test printing in service mode, the leading edge of print paper jams at
a location after the secondary transfer belt.
Cause Step
1
Separation 2
sensor (PS5)
Separation 3
sensor (PS5)
Fixing roller 4
drive gear
Fixing assem- 5
bly inlet guide,
Fixing/separa-
tion upper
guide,
Fixing/separa-
tion lower
guide
Upper fixing 6
roller, Lower
fixing roller
Upper fixing 7
roller, Lower
fixing roller
Fixing/delivery 8
sensor
(PS1903) lever
Fixing/delivery 9
sensor
(PS1903)
Fixing delivery
roller
COPYRIGHT © 1999 CANON INC.
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Checks
Does the leading edge of print paper
reach the fixing roller?
Is the separation sensor lever or
spring damaged or deformed? Is the
spring of the sensor lever dis-
placed?
Replace the separation sensor. Is
the problem corrected?
Is the fixing roller drive gear worn or
cracked?
Is the fixing assembly inlet guide,
fixing/separation upper guide, or fix-
ing/separation lower guide soiled,
scratched, or coated with toner?
Is the upper fixing roller or the lower
fixing roller soiled or coated with
toner?
Is the upper fixing roller or the lower
fixing roller deformed or damaged?
Is the fixing/delivery sensor dam-
aged or worn? Is the spring of the
sensor lever displaced?
Replace the fixing/delivery sensor. Is
the problem corrected?
CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 10 TROUBLESHOOTING
Yes/No Action
NO Go to step 2.
YES Go to step 4.
YES If damaged or
deformed, replace the
lever or the spring.
Position the spring cor-
rectly.
YES Replace the sensor.
YES Replace the worn or
cracked drive gear.
YES Clean the parts as nec-
essary.
YES Clean the upper fixing
roller or the lower fixing
roller.
YES Replace the rollers as
necessary.
YES Replace the damaged
or worn lever. Position
the spring correctly.
YES Replace the sensor.
NO If the fixing /delivery
roller is worn, replace
it.
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