Canon 1130 Service Manual page 927

CHAPTER 13 TROUBLESHOOTING
Code
E020
13-337a 13-6
COPYRIGHT © 2002 CANON INC.
Cause
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.
CANON CLC1100/1130/1150/1160/1180 REV.0 FEB. 2002 PRINTED IN JAPAN (IMPRIME AU JAPON)
Timing of detection
xx80 When samplings are taken
during copying sequence, the
level of WINDOW-M/C/Y/K
(window soiling correction
coefficient) is '130%' or more.
xx81 When samplings are taken
during copying sequence, the
level of WINDOW-M/C/Y/K
(window soiling correction
coefficient) is '70' or less.
xxA0 When samplings are taken
during copying sequence, the
level of SGNL-M/C/Y is '306'
or less.
xxA1 When samplings are taken
during copying sequence, the
level of REF-M/C/Y set
initially decreases (intensity)
by 30% or more.
xxA2 When samplings are taken
during copying sequence, the
level of PT-SIG-K is '51' or
less.
00A3 During copying sequence, an
error in memory backup data
causes the initial setting of the
following to be '100' or less,
or '1023': DISPLAY>DENS>
P-SENS-P.