Controlling The Drum Heater; Outline - Canon iR5000 Service Manual

CHAPTER 4 IMAGE FORMATION SYSTEM

6. Controlling the Drum Heater

6.1 Outline

The system used to control the drum heater is constructed as follows:
Environment switch
(SW3)
J102B
1
0V
7
DRUM HT ON [1]
8
9
10
11
12
13
14
15
16
The following signals are used:
[1] drum heater drive control signal; when '1', AC power is supplied to the drum heater
control PCB.
[2] thermistor temperature detection signal; feeds voltage of a level suited to the detected
temperature.
4-46 P
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J2053
3
J2052
1
2
3
4
5
6
7
8
F04-601-01
COPYRIGHT © 2000 CANON INC.
W1
J2053
AC
2 W2
2000 2000 2000 2000 CANON iR5000/iR6000 REV.0 JULY 2000
J2002
HT-TEMP [2]
1
2
3 Thermistor
4
5
6
Drum heater
(H3)
Controlled
to 43˚C