Canon PC920 - Page 99

CHAPTER 4 IMAGE FORMATION SYSTEM
COPYRIGHT © 1999 CANON INC. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
4-5
Figure 4-103
Main
transformer
T101
PR_DC_ON J103 -4
J203
-5
PDC_PWM DC bias control signal PDC_S DC voltage monitor signal PAC_S AC component current monitor signal PAC_OUT AC bias output signal
Amplifier
Voltage
separation
circuit
Photosensitive
drum
Primary
charging
roller
T508
Microprocessor (Q900)
Microprocessor (Q101)
DC controller PCB
Composite power supply PCB
Serial communication
High-voltage
transformer
for primary
charging