Fuser-control circuit The fuser-control circuit monitors and controls the temperature in the fuser. The product uses on- demand fusing. The fuser-control circuit consists of the following major components: ● Fuser heater (H1); heats the fusing film ● Thermistor (TH1); detects the fuser temperature (contact type) ● Thermoswitch (TP1); prevents abnormal temperature rise in the fuser (contact type) Figure 1-9 Fuser control circuit Fuser film TH1 TP1 H1 Pressure roller FUSER TEMPERATURE signal Fuser heater control circuit circuit Fuser control DC controller Engine controller ENWW Engine-control system 15 c