Canon NP6320 Service Manual page 233

30. indicator does not go OFF when there is toner
Cause Step
DC controller 1
PCB
DC controller 2
PCB
Stirring rod 3
gear
Black toner
level sensor
COPYRIGHT © 1999 CANON INC.
Check
Does the indicator come back ON when
the power switch is set OFF and then ON
again?
Turn the power OFF, and disconnect J39.
Turn the power ON, and press the Copy
Start key to make any copies of the fol-
lowing:
[1] making 7 continuous copies on A3
[2] making 9 continuous copies on A4
[3] making 5 single copies on A3
[4] making 5 single copies on A4
Press the Copy Start key once again.
Does the indicator go red when any copies
of the above has been made?
Does the stirring rod inside the black de-
veloping assembly operate normally?
CANON NP6320 REV.0 DEC. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 10 TROUBLESHOOTING
YES/
Action
NO
YES Replace the DC control-
ler PCB.
YES Replace the DC control-
ler PCB.
NO Check the stirring rod
and gear.
YES Replace the black toner
level sensor (TS1).
10-55