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 Fuser components TH4 H1/H2 Fuser film TH1 TP1 TH2 Pressure roller TH3 FUSER TEMPERATURE signal FUSER HEATER CONTROL signal Fuser heater control circuit Fuser heater safety circuit High-voltage power supply DC controller The following table shows the function of each fuser component.
Component Function H1 Fuser main heater Heats center area of the fuser film H2 Fuser sub heater Heats both ends of the fuser film TP1 Thermoswitch Prevents an abnormal temperature rise of the fuser heater (contact type) TH1 Main thermistor Detects the temperature at center of the fuser heater (contact type) ENWW Engine control system 15