Canon 1000 Service Manual page 538

7. TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS
Checking E020
1) Identify the color for which 'E020' has been indicated using 'JAM/ERROR' under 'DISPLAY' in service
mode.
2) Turn OFF and then ON the power switch, and select the following mode:
A3/11" × 17"
•
• 21 copies
• mono copy of the color for which 'E020' has been indicated.
3) Start service mode, and select 'DENS/VCONT' under 'DISPLAY'.
4) Place a stack consisting of several A3/11" × 17" sheets of paper on the copyboard glass, and press the
Start key.
5) Check the following two points:
• Normal if the value of 'DENS' for the color for which 'E020' is indicated approaches '0'.
• Is 'E020' indicated after copying?
f. E020=XXF1, 04F2
Cause Step
YMC hopper
YMC error
sensor
Bk hopper
SALT sensor
7-102
COPYRIGHT © 2001 CANON INC.
Checks
1 Is the detailed code '04F2'?
2 Is the level of toner inside the hopper
for which 'E020' is indicated above
the toner sensor?
3 Disconnect the connector of the
toner level sensor (front of toner).
Replace the error sensor (hopper
rear). After replacement, is the Add
Toner message indicated?
4 Is the level of toner inside the Bk
hopper above the toner sensor?
5 Replace the Bk toner level sensor
(upper). Is the Add Toner message
indicated?
Yes/No
CANON CLC1000/1000S/3100 REV.2 MAY 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)
Action
YES Go to step 4.
YES Replace the hopper. (To
supply toner, see p. 7-22.)
YES Connect the connector of
the toner level sensor,
and supply the hopper
with toner. (To supply
toner, see p. 7-22.)
NO Replace the hopper. (To
supply toner, see p. 7-22.)
YES
NO
YES End. (To supply toner,
see p. 7-22.)