Canon Vizcam 1000, Service Manual

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COPYRIGHT © 2001 CANON INC. CANON CLC1000/1000S/3100 REV.2 MAY 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)
3-121
3. OPERATION AND TIMING
If the waste toner pipe becomes clogged for some reason and the waste toner feeding screw will not
rotate, leakage of waste toner can occur.
To prevent such a problem, a feeding screw detection mechanism is provided. The gear A (Figure 3-
553) used to drive the waste toner feeding screw shifts over the shaft because of the axial force that occurs
when the feeding screw locks.
The shift of the gear A is checked by the lock detection switch (SW4). When the gear A pushes the
switch, the waste toner feeding motor (M20) stops and ‘E013’ will be indicated on the control panel.
Figure 3-553
M20 Waste toner
feeding motor
Lock detection switch
(MS4)
Gear
A
DC controller PCB
(front of copier)
Waste toner feeding motor drive signal (M20MD)
Lock detection signal (WTBDT*)