Canon 1000S, Руководство по обслуживанию, Страница: 528 / 840

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COPYRIGHT © 2001 CANON INC. CANON CLC1000/1000S/3100 REV.2 MAY 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)
7. TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS
5 E012
Cause
Excess load
Drum motor
(M21)
DC controller
PCB
DC controller
PCB
Drum motor
Step
1
2
3
4
Checks
Does the drum motor (M21) rotate
during initial rotation?
Slide out the primary charging
assembly, and check the condition of
the cleaning blade by the naked eye.
(Do not slide out the process unit.)
Is the cleaning blade bent?
Set the meter to the 5VDC range,
and measure the voltage between
J2226A-13 (+; M210N) and J2226A-
14 (–; GND) on the DC controller
PCB.
Turn OFF and then ON the power
switch. Does the voltage change
from about 5 V to about 0 V when the
main motor starts to rotate?
Set the tester to the 5VDC range,
and measure the voltage between
J2226A-12 (+; M21PLL*) and
J2226A-14 (–; GND) on the DC
controller PCB.
Turn OFF and then ON the power
switch. Does the voltage change
from about 3 V to about 0 V when
themain motor starts to rotate?
Yes/No
YES
YES
YES
NO
YES
NO
Action
Go to step 4.
Put a finger through the
primary charging assem-
bly slot, and push the
blade support plate to
correct the bend; then,
slide out the process unit.
Check if the photosensi-
tive drum should be
subject to excess load.
Replace the cleaning
blade as necessary.
Replace the drum motor
(M21).
Check the wiring from
J2226A to the drum
motor; if normal, replace
the DC controller PCB.
Replace the DC controller
PCB.
Check the wiring from
J2226A to the drum
motor; if normal, replace
the drum motor.