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 1-12Fuser-heater control circuit

 

 

Engine controller unit

 

Fuser control circuit

DC controller

 

Frequency

ZEROX

 

detection circuit

 

 

RL1001

 

RL1002

Relay control

RLYD

 

 

circuit

 

Fuser heater safety circuit

FSRTH2

FSRTH1

Fuser heaterFSRD control circuit

Fuser film

 

TH2

 

TP1 TH1

 

H1

H1: Fuser heater

 

Pressure roller

TP1:Thermoswitch

TH1: Main thermistor

 

 

TH2: Sub thermistor

Fuser

18 Chapter 1 Theory of operation

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