E013 - Canon NP6251 Service Manual

9. E013

Cause Step
Waste toner 1
feeding screw
(locked)
MSW4 2
DC controller
PCB
Harness of 3
vertical path
roller drive
clutch (CL15)
COPYRIGHT © 1997 CANON INC.
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Checks
Is the waste toner feeding screw
drive gear pushing the waste
toner feeding screw locked
detecting switch (SW4)?
Is the voltage between J114B-1
(+) and J114B-2 (–) on the DC
controller PCB about 5 V when
the switch is pressed and about 0
V when released?
Does the harness of the vertical
path roller drive clutch have an
open circuit?
CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 11 TROUBLESHOOTING
YES/NO Action
YES The feeding screw inside
the waste toner pipe is
locked for some reason.
Remove the waste toner
pipe, and try turing the
screw by hand. If it can
be rotated easily, install
it and see if the problem
has been corrected;
otherwise, replace the
waste toner pipe, and
remove the cause.
NO Replace MSW4.
YES Replace the DC
controller PCB.
YES Replace the clutch
(SL15).
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