Canon 1000 Service Manual page 739

Code
• Developing assembly (deteriora-
tion)
• Developing cylinder (rotation
failure)
• Developing assembly (locking
failure)
• Toner density sensor (faulty)
• Developer (inside developing
assembly; stirring fault)
• Toner level sensor (faulty)
E020
• Toner detect sensor (faulty)
• Toner stirring screw (faulty)
• Developer (deterioration)
• Developing cylinder (rotation
failure)
• Toner density sensor (faulty)
• Developer (inside developing
assembly; stirring fault)
• Toner level sensor (faulty)
COPYRIGHT © 2001 CANON INC.
Cause
CANON CLC1000/1000S/3100 REV.2 MAY 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)
7. TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS
xxBB During copying sequence, the value of
the following is 30% or more higher
than the initial setting:
REF-Y, REF-M, REF-C
xxBC During copying sequence, the average
of the following values after sampling is
306 or higher:
SGNL-Y, SGNL-M, SGNL-C
xxBD During copying sequence, the value of
the following is 30% or more lower
than the initial setting:
REF-Y, REF-M, REF-C
xxBF When setting initial data, the values of
the following cannot be set:
SIGG-Y, SIGG-M, SIGG-C
xxF1 The Y/M/C hopper error sensor has
detected the absence of toner.
04F2 The Bk hopper error sensor has
detected the absence of toner 10 times
or more continuously.
xxD0 The value of the toner supply time
correction data based on 'SGNL-Y/M/
C' is 141 or more for 20 copies or more
during copying sequence.
xxE0 The value of the toner supply time
correction data based on 'SGNL-Y/M/
C' is –188 or less for 20 copies or more
during copying sequence.
Description
7-303