Outline Of Electrical Circuit - Canon FC220 Service Manual

CHAPTER 2 BASIC OPERATION
B. Outline of Electrical Circuit
The copier's main electrical mechanisms are controlled by the microprocessor on
the DC controller/DC power supply PCB. According to the program stored in advance,
the microprocessor reads input signals from the control keys, and generates signals to
drive such loads as motors, solenoids, and lamps, as necessary.
Copyboard position
sensor
Delivery sensor
Pick-up sensor
Photointerrupter
Fixing heater
temperature sensor
Thermistor
Power switch
Control key
Door
switch
2-2
COPYRIGHT © 1998 CANON INC.
DC controller/DC power supply PCB
Q
TH1
Delivery Relay
door
switch
Figure 2-101B
CANON PC400/420/430,FC200/220 REV.0 JAN.1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Q101
+DC24V
+DC5V
Sub power
supply circuit
Scanning lamp
Main motor
Solenoid
Primary/Transfer
charging roller
High-voltage
transformer
+DC5V
DC power
supply PCB
Heater
AC driver
Driver Scanning lamp
DC load
Developing
cylinder
Display
AC load