Fixing System
Functional Configuration
Overview
The fixing system fixes the toner on the paper using pressure and heat.
Description
The fuser heater control circuit and the fuser safety circuit control the fuser temperature according to the commands from the DC
controller.
The printer uses an on-demand fusing method.
Fixing temperature signal
Fixing heater control signal
Low Voltage Power Supply PCB
Pressure Roller
Fixing film unit
Fixing heater
safety circuit
Fixing heater
control circuit
DC controller
Engine controller PCB
TH1
TP1
H1
Symbol Component name Function
H1 Fixing Heater Heats the fuser film ass’y.
TH1 Thermistor Detects the temperature of the fuser heater
TP1 Thermal Fuse Prevents an abnormal temperature rise of fuser heater
Fixing temperature control
Overview
This control circuit controls the fixing heater temperature to be maintained within the target temperature.
Description
The DC Controller monitors the fixing temperature detection signal (FSRTHSNS) and outputs a fixing control signal (FSRD)
according to the detected temperature. The fixing control circuit controls the Fixing Heater according to this signal, to maintain
the fixing heater temperature within the target values.
2. Technology
47
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