Canon CP660 Service Manual page 343

3 Transfer/Fixing Assembly
A. After executing test printing in service mode, a jam occurs without the leading edge
of print paper reaching the secondary transfer belt assembly.
Cause Step
Registration 1
roller
Connector 2
(registration
clutch CL1
drive 24 V sup-
ply line)
Registration 3
clutch (CL1)
Registration 4
paper sensor
PS1 (detection
mechanism)
Registration 5
paper sensor
(PS1)
DC controller
PCB
COPYRIGHT © 1999 CANON INC.
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Checks
Is the registration roller worn,
deformed, or soiled?
Are the connectors J212 on the DC
controller PCB and the connector
J37 on the relay PCB connected
securely?
Disconnect the connector J37 of the
registration clutch, and measure the
resistance between the connectors
J37-1 (+24 UH) and J37-2 (REG-
CLD*) on the harness side. Is it
about 210 Ω?
Is the registration paper sensor
(PS1) lever damaged or worn? Is
there any displaced spring?
Replace the registration paper sen-
sor. Is the problem corrected?
CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 10 TROUBLESHOOTING
Yes/No Action
YES If damaged or worn,
replace it. If soiled,
clean it.
NO Connect the connector.
NO Replace the registra-
tion clutch.
YES Replace the damaged
or worn part. Position
the spring correctly.
YES Replace the sensor.
NO Replace the DC con-
troller PCB.
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