Table of Contents
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Fuser control
The fuser heater control circuit and the fuser heater safety circuit control the fuser temperature according
to commands from the DC controller. The product uses an on-demand fusing method.
Figure 1-8
TH3
The following table shows the function of each fuser component.
Component
H1
H2
TP1
TH1
16
Chapter 1 Theory of operation
Fuser components
TP1
TH1
TH2
FUSER HEATER CONTROL signal
Fuser heater
control circuit
Function
Fuser main heater
Heats center area of the fuser film
Fuser sub heater
Heats both ends of the fuser film
Thermoswitch
Prevents an abnormal temperature rise of the fuser heater (contact type)
Main thermistor
Detects the temperature at center of the fuser heater (contact type)
TH4
H1/H2
FUSER TEMPERATURE signal
Fuser heater
safety circuit
High-voltage power supply
Fuser film
Pressure roller
DC controller
ENWW
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Table of Contents
Troubleshooting
