Canon 1000 Service Manual page 145

5. Primary Charging Wire Cleaning
The CLC1000 is equipped with an automatic cleaning mechanism for the primary charging wire. The
mechanism turns on to clean the wire under the following conditions:
• The temperature of the fixing assembly is 165°C or less when the power switch is turned on.
• When the cleaning mechanism is activated in user mode.
• When 5000 copies have been made since the previous cleaning operation.
DC controller PCB
Primary charging wire
cleaning motor
(M24Bk,C,M,Y)
When the control signal from the DC controller is M24FW=1, M24RV=0, the primary charging wire
cleaning motor (M24) is rotated clockwise for about 13 sec; then, when M24FW=0, M24RV=1, the motor is
rotated counterclockwise for about 13 sec.
This sequence of operations is the same for all colors.
COPYRIGHT © 2001 CANON INC.
Cleaning pad
Figure 3-525
CANON CLC1000/1000S/3100 REV.2 MAY 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)
3. OPERATION AND TIMING
Counterclockwise
Clockwise
Primary charging wire
3-101