COPYRIGHT © 2001 CANON INC.
2000 2000 2000 2000
CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001
CHAPTER 6 FIXING SYSTEM
6-6 P
3 Controlling the Fixing Temperature
3.1 Outline
The fixing temperature is controlled for the following:
[1] Fixing heater temperature
[2] Thermistor error detection
F06-301-01
+5V
+5V
+5V
TH1
TH2
IC334
IC300
Fixing main
thermistor
Fixing sub
thermistor
Heater relay circuit
A/D converter
(200V)
Thermal switch
(TP1)
Fixing main heater (H1)
Fixing sub heater
(H2)
Switch PCB
Relay
RL1
DC controller PCB
Main power supply PCB
High-
temperature
detection
circuit
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