COPYRIGHT © 1999 CANON INC. CANON CLC1120/1130/1150 REV.0 MAR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
13-337
CHAPTER 13 TROUBLESHOOTING
Code
Cause
· The developer has deteriorated.
· The developing cylinder fails to
rotate.
· The developer is not locked.
· The toner concentration sensor is
faulty.
· The developer inside the
developing assembly is not stirred
properly.
· The toner level sensor is faulty.
· The sensor is subjected to stray
light (no cover, front cover open).
· The photosensitive drum has
deteriorated, or the toner level
sensor is faulty.
· The hopper motor is faulty.
· The hopper motor has an open
circuit.
Timing of detection
xxB2 When samplings are taken
during copying sequence, the
level of PT-SIG-M/C/Y is
'1020' or more and that of PT-
SIG-K is '550' or more.
xxC0 When samplings are taken
during copying sequence, the
level of DENS-M/C/Y/K is
'+3%' (when feeding 20 sheets
continuously).
xxD0 When samplings are taken
during copying sequence, the
level of DENS-M/C/Y/K is
'+3%' (when feeding 20 sheets
or more continuously).
xxE0 When samplings are taken
during copying sequence, the
level of DENS-M/C/Y/K has
exceeded '-5%'.
00FF After the hopper motor has
turned on, the hopper motor
lock signal (HOPMLK) is '0'
for 0.1 sec or more.
xxFF After the hopper motor has
turned on, the hopper motor
lock signal (HOPMLK) is '0'
for 0.1 sec or more (the toner
supply clutch is on).
E020
The developer has deteriorated.
· The developing cylinder fails to
rotate.
· The developing assembly is not
locked.
· The toner concentration (patch
detection) sensor is faulty.
· The developer inside the
developing assembly is faulty.
· The toner level sensor is faulty.
· The concentration sensor is
subjected to stray light (no cover,
front cover open).
· The photosensitive drum has
deteriorated.
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