E050 - Canon 1000 Service Manual

b. E041=0002
Cause Step
Lifter lower limit
switch (SW8002)
Paper deck
motor (M8001)
DC controller
PCB
16

E050

Cause Step
Duplexing unit
stacking guide
home position
sensor (PS29)
Operation
(faulty)
Duplexing unit
stacking guide
motor (M23)
DC controller
PCB
COPYRIGHT © 2001 CANON INC.
Checks
1 Is the lifter down and pushing the
switch when 'E041' is indicated?
2 Turn OFF and ON the power switch
to clear 'E041'.
Does bit 5 of address 801004 under
'DISPLAY/SENSOR' in service mode
change when the lifter lower limit
switch (SW8002) is pressed by a
finger?
3 Turn OFF and ON the power switch.
Does the voltage between J2223-A-5
(+) and J2223A-3 (–) on the DC
controller change from 0 V to 24 V
when closing the cover?
Checks
1 Is the sensor normal? (See the
instructions on how to check
photointerrupters.)
2 Is there any obstacle in the operation
path of the duplexing unit stacking
guide?
3 Replace the motor. 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
NO
NO
YES
YES
NO
Yes/No
NO
YES
YES
NO
Action
Go to step 3.
Check the wiring from the
switch to the DC controller
PCB; if normal, replace
the sensor.
Replace the DC controller
PCB.
Check the drive system
and wiring from the motor;
if normal, replace the
motor.
Replace the DC controller
PCB.
Action
Replace the sensor.
Remove it.
End.
Replace the DC controller
PCB.
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