Canon 1130 Service Manual page 922

Code
E020
COPYRIGHT © 2002 CANON INC.
Cause
• The toner concentration sensor is faulty/
soiled.
• The developer inside the developing
assembly is not stirred properly.
• The sensor is subjected to stray light
(no cover, front cover open).
• The photosensitive drum has
deteriorated.
CANON CLC1100/1130/1150/1160/1180 REV.1 FEB. 2002 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 13 TROUBLESHOOTING
Timing of detection
xx24 At time of setting initial
data (as during
installation), the result of
averaging five retry
samplings of PT-SIG-M/
C/Y levels is '683' or less
or that of PT-SIG-K
levels is '305' or less.
xx25 At time of initial data
setting (as upon
installation), the value
after sampling and
averaging of the
following is '256' or
lower:
ADJUST>DENS>P-
SENS-Y/M/C/K.
xx30 At time of setting initial
data (as during
installation), the result of
averaging samplings of
SGNL-M/C/Y levels is
'859' or more.
xx31 At time of setting initial
data (as during
installation), the result of
averaging samplings of
REF-M/C/Y levels is
'930' or more.
13-333