Canon imageCLASS X LBP1238, Service Manual

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Fixing System
Functional Configuration
Overview
The fixing system forms a permanent image by melting the toner on the paper using pressure and heat.
Description
The fixing control circuit controls the temperature of the Fixing Assembly.
The Fixing Assembly of this machine uses the on-demand fixing method.
Fixing Temperature Signal
Fixing Heater Control Signal
DC Controller PCB
Low Voltage Power Supply Unit
Fixing Control Circuit
TH1
TP1
H1
Pressure Roller
Fixing Film
Fixing Heater
Control Circuit
Fixing Heater
Safety Circuit
Symbol Parts name
H1 Fixing Heater
TH1 Thermistor
TP1 Thermo Switch
Fixing Temperature Control
Overview
Temperature control of the Fixing Assembly is performed by the Fixing Heater control circuit and Fixing Heater safety circuit
according to the command of the DC Controller.
Description
The DC Controller PCB monitors the fixing temperature detection signal and outputs a fixing control signal according to the
detected temperature. The fixing control circuit controls the Fixing Heater on the basis of this signal, and controls the temperature
of the Fixing Heater to the target value.
2. Technical Explanation (Device)
33