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Fuser temperature control
The fuser temperature control maintains the temperature of the fuser heater at its targeted temperature.
The DC controller monitors the FUSER TEMPERATURE (FSRTH1, FSRTH2) signals and sends the
FUSER HEATER CONTROL (FSRD) signal according to the detected temperature. The fuser heater
control circuit controls the fuser heater depending on the signal so that the heater remains at the targeted
temperature.
Figure 1-12 Fuser-heater control circuit
ZEROX
TH1
TP1
H1
FSRD
RLYD
FSRTH2
RL1001
TH2
RL1002
FSRTH1
H1: Fuser heater
TP1: Thermoswitch
TH1: Main thermistor
TH2: Sub thermistor
Pressure roller
Fuser film
Fuser heater
control circuit
Fuser heater
safety circuit
DC controller
Engine controller unit
Fuser control circuit
Fuser
Relay control
circuit
Frequency
detection circuit
18 Chapter 1 Theory of operation ENWW
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