Iii . Controlling The Fixing Temperature; Outline - Canon ImageRunner 600 Service Manual

CHAPTER 8 FIXING SYSTEM

III . CONTROLLING THE FIXING TEMPERATURE

A.

Outline

The fixing temperature mechanism is controlled for the following:
[1] Down sequence
[2] Temperature by Mode
[3] Error detection
J508B
1
M-TEMP
7
0V
8
S-TEMP
9
0V
10
20
Main
heater
J505A
1 1 1
MHDTC
9
MH-ON
10
11
12
0V
13
24V
14
When '1', the main heater turns on.
Figure 8-301 Construction of the Control System
8-12
COPYRIGHT © 1999 CANON INC.
Voltage to suit the
temperature detected by the
main thermistor.
Upper fixing roller
Sub heater
SH-ON
SHDTC SSR
When the sub heater is powered, '0'.
Voltage suited to the temperature
detected by the sub thermistor
Main thermistor
Thermal switch
When 223˚C, the AC
line is turned off.
RLY
CANON imageRUNNER 600 REV.1 JAN. 2000 PRINTED IN U.S.A.
Sub thermistor
Relay
Front door