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CHAPTER 4 IMAGE FORMATION SYSTEM
COPYRIGHT
©
1999 CANON INC. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
4-12
Figure 4-107
Main
transformer
T101
T201
+5V
Photo
sensitive
drum
Developing
cylinder
Static eliminator
Static
eliminator
bias generation
circuit
Developing
DC bias
detection
circuit
+
DC bias control signal
BIAS_PWM
DC bias monitor signal
BIAS_S
AC bias oscillation signal
ACBIAS
Microprocessor (Q900)
Microprocessor (Q101)
Composite power supply PCB
Serial communication
AE sensor
PCB
Control
panel
DC controller PCB
Density
correction
switch (SW101)
J103
-3
J203
-6
-2 -7
DV_DC_ON
DV_AC_ON
AE signal
Copy density
setting signal
Copy
density
correction
signal
High-voltage transformer
for developing/static eliminator