Canon PC300 Service Manual page 53

IPERATIONS AND TIMING
Photo-
sensitive
drum
Transfer
charging
roller
24v
Positive
bias
control
circuit
"Transformer
i(1106)
i
i
t
E
fc
' = os
| i 8
i =
i —
— x=
°o
o = z
z o G
a| | €
Ss he 8
ia} > as
8 g ro}
s| | 3
=
8 2 ro)
a ® [=)
5 ° 5
% i) ra
a g &
e s t e
Transformer (T107)
Multiplier/
Rectifier circuit
Constant current}
control circuit
Pulse/DC
converter
circuit
Current
sensor
circuit
Current
limiter
circuit
(Transfer DC bias control
comma
Microprocessor
DC controller/DC power supply PCB
Figure 3-20
3-26 COPYRIGHT © 1904 CANON INC.
CANON PC300/320/925, FC210/20 REV.0 JULY 1994 PRINTED IN JAPAN (IMPRINE AU JAPON)