Controlling The Cassette Heater - Canon Image Reader-A1 iR5000i Service Manual

CHAPTER 5 PICK-UP/FEEDING SYSTEM

7. Controlling the Cassette Heater

The system used to control the cassette heater is constructed as follow:
DC power
supply PCB
2
Power supply
SW3
Environment switch
The following signal has the function indicated:
[1] Cassette Heater Drive Control Signal:
When '1', supplies the AC driver PCB with AC power.
The cassette heater switch (SW4) serves to supply power to the heater
through the AC line or to deprive it of power.
If the environment switch (SW3) is off, the heater will not be supplied with
power through the AC line even if the cassette heater switch (SW4) remains
on.
5-40 P
DC controller
PCB
J4001
J119
J102B
4 3
1
7 12 14
Main
power
switch
SW1
RL1
COPYRIGHT © 2001 CANON INC.
4 3 2 1
J2053
1
2
8
AC driver PCB
J2051
3 2
F05-700-01
2000 2000 2000 2000
Cassette
heater switch
Cassette heater
SW4
1
CANON iR5000i/iR6000i REV.0 JUNE 2001
H4