Canon NP6251 Service Manual page 635

CHAPTER 11 TROUBLESHOOTING
Cause Step
Pick-up clutch 8
DC controller
PCB
Sensor 9
Pick-up
assembly
11-104
COPYRIGHT © 1997 CANON INC.
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Checks
Set the meter to the 30VDC
range, and connect the probes of
the meter to the connectors on the
DC controller shown. Does the
voltage change from 24 to 0 V
when the Copy Start key is
pressed?
Cassette Clutch +
3 CL10 J117A-2 GND
4 CL12 J130A-2 GND
Find out which sensor found the jam
using 'B-JAM' in service mode (
). Is the sensor normal?
CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
YES/NO
YES Check the wiring; if
normal, replace the
corresponding clutch.
NO Replace the DC
controller PCB.
–
NO Check the wiring and the
lever; if normal, replace
4
the sensor.
YES Remove the pick-up
assembly, and check the
spring.
Action