Primary Charging Assembly - Canon 1000 Service Manual

D. Primary Charging Assembly
1. Outline
Figure 3-520 shows the construction of the primary charging assembly. The charge current for the
primary corona wire and the pre-primary corona wire and the grid bias is controlled by the control signal from
the DC controller. The change current for the primary corona wire is constant, and the grid bias is varied to
control the drum surface potential.
Control signal
Primary charging
assembly
Pre-primary
charging assembly
COPYRIGHT © 2001 CANON INC.
Bk
HVT2-2
C
Bk C
CANON CLC1000/1000S/3100 REV.2 MAY 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)
DC controller PCB
Grid bias
M
Figure 3-520
3. OPERATION AND TIMING
HVT2-1
M
Y
Y
3-97