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CHAPTER 11 TROUBLESHOOTING
COPYRIGHT
©
1999 CANON INC. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
11-57
14 The copy has a fixing fault.
YES/NO
NO
YES
NO
YES
Cause
Copy paper
Fixing film
Fixing heater
DC control-
ler PCB,
Composite
power
supply PCB
Step
1
2
3
Checks
Is the copy paper of a recommended
type?
Is the problem vertical and, in addi-
tion, in the form of lines?
Does the heater turn on when the Copy
Start key is pressed?
Action
Try a recommended
type. If the results are
good, ask the user to
use a recommended
type.
Check the fixing film
and the fixing lower
roller for scratches. If
there are scratches,
replace them.
See “The fixing heater
fails to turn on.”
The control tempera-
ture of the fixing
heater is likely to be
too low. Check the
fixing assembly top
unit, DC controller
PCB, and composite
power supply PCB.
15 The copy has a misplaced leading edge. (extremely excess margin)
16 The copy has a misplaced leading edge. (excess margin)
17 The copy has a misplaced leading edge (no margin)
YES/NO
NO
NO
YES
NO
NO
YES
Cause
Pickup
roller,
Pickup
clutch,
Cassette
Sensor
(PS1), Light-
blocking
plate
VR104
Solenoid
(SL2), DC
controller
PCB
Copy paper
Registration
clutch
Step
1
2
3
4
5
Checks
Make copies using the cassette and
manually. Are the results the same?
Are the scanner home position sensor
(PS1) and the light-blocking plate
normal? (See the instructions on how
to check the photointerrupter.)
Adjust the image leading edge margin.
(p. 11-6) Is the problem corrected?
Does the registration clutch solenoid
(SL2) operate normally?
Is the paper of a recommended type?
Action
Check the pickup
roller, pickup clutch,
and cassette. Or,
replace them.
Replace the sensor, or
check the light-
blocking plate.
End.
1. Check the solenoid
(SL2).
2. Check the DC
control PCB.
Try a recommended
type. If the results are
good, ask the user to
use a recommended
type.
Check the registration
clutch.