Canon CP660 Service Manual page 308

CHAPTER 10 TROUBLESHOOTING
14 The print has an uneven image.
Cause Step
Separation 1
sensor
Fixing assem- 2
bly
High-voltage 3
PCB 2
4
Fixing assem- 5
bly
Registration 6
roller, Feeding
roller 2
Separation sta- 7
tic eliminator
Separation sta- 8
tic eliminating
bias PCB
9
DC controller
PCB
10-26
COPYRIGHT © 1999 CANON INC.
Download free service manual at http://printer1.blogspot.com
Checks
Is the movement of the lever of the
separation sensor poor?
Is the fixing assembly inlet guide
soiled? Or, is the contact of the
upper fixing roller (for fixing/separa-
tion bias) or the contact for
fixing/separation bias of the printer
unit soiled?
Are the connectors J5005 and
J5006 on the high-voltage PCB 2
connected securely?
Replace the high-voltage PCB 2. Is
the problem corrected?
Is the upper fixing cover fitted to the
fixing assembly securely?
Is the drive gear of the registration
roller or the feeding roller worn?
Is the charging wire of the separa-
tion static eliminator broken?
Are the connectors J5600, J5601,
and J5602 on the separation static
eliminating bias PCB connected
securely?
Replace the separation static elimi-
nator PCB. Is the problem
corrected?
Yes/No
YES
YES
NO
YES
NO
YES
YES
NO
YES
NO
CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Action
Replace the sensor
lever.
Clean the contact. If it
is deformed or dam-
aged, replace it. Also,
check for a displaced
contact.
Connect them securely.
Replace the high-volt-
age PCB 2.
Fit the cover securely.
Replace the worn gear.
Replace the separation
static eliminator.
Connect them securely.
End.
Replace the DC con-
troller PCB.