Canon 1000 Service Manual page 535

Cause Step
Toner density
sensor
DC controller
PCB
SALT sensor
Photosensitive
drum
COPYRIGHT © 2001 CANON INC.
Checks
5 Is 'E020' for the SALT sensor?
Detailed code XXXX
↑ − Numeral: SALT
6 Replace the toner density sensor of
the color for which 'E020' is indi-
cated. Is the problem corrected?
7 Is the front cover open while the
transfer frame front cover is removed
(i.e., is the SALT sensor subject to
stray light)?
8 Replace the photosensitive drum. Is
the problem corrected?
CANON CLC1000/1000S/3100 REV.2 MAY 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)
7. TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS
Yes/No
sensor
Alphabet: toner
density sensor
Action
YES Go to step 7.
YES End.
• Be sure to replace the
developer after replac-
ing the toner density
sensor.
NO Replace the DC controller
PCB.
YES Install the transfer frame
front cover.
NO Replace the SALT sensor.
• Be sure to replace the
developer after replac-
ing the toner density
sensor.
YES End.
NO Replace the DC controller
PCB.
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