COPYRIGHT © 1998 CANON INC. CANON PC400/420/430,FC200/220 REV.0 JAN.1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHPTER 4 IMAGE FORMATION SYSTEM
4-13
Figure 4-101E
Oscillation
circuit
Voltage
control
circuit
Positive
bias
control
circuit
Multiplier/
Rectifier circuit
Constant current
control circuit
Pulse/DC
converter
circuit
Current
sensor
circuit
Current
limiter
circuit
Microprocessor
Photo-
sensitive
drum
Transfer
charging
roller
Transformer
(T106)
Transformer (T107)
DC controller/DC power supply PCB
Transfer positive DC bias ON command (TREV)
Voltage sensor (analog signal)
Transfer DC bias ON command (HVTDC)
Transfer DC bias control
command (DCTPWM)
24V
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