Controlling The Drum Heater; Outline - Canon GP605 Service Manual

CHAPTER 6 IMAGE FORMATION SYSTEM
VI . CONTROLLING THE DRUM HEATER
A.

Outline

Volume 2>Chapter 4>VI.B. "Drum Heater"
Figure 6-601 shows the construction of the control system for the drum heater.
Heater
SW3
Main power
switch
SW1
When the heater switch is off,
the heater operates in sync
with the main power switch.
J505A
1
2
3
4
5
6
7
8
When '1', AC power supply is started to
the heater temperature control PCB.
Figure 6-601 Construction of the Control System
6-48
COPYRIGHT © 1999 CANON INC.
When the heater switch is turned on, the heater will remain on
at all times, operating independently of the main power switch.
itch
sw
Front door
switch
1 2 3 4 5
J2605
D-HTR-ON
3
0V
2
1
SW2
When the input voltage is
equivalent of 42˚C or more,
the heater will turn off; 42˚C
or less, the heater will turn on.
J2601
J2602
AC (H)
1 W1
2
AC (N)
3 W2
4
5
6
7
8
9
10
11
CANON GP605/605V REV.0 JAN. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
J01
HT-TEMP
1
2
3
Thermistor
4
Fuse
5
6
Drum heater (H3)
Controlled to 42˚C