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 1-5 Fuser components TH4 H1/H2 Fuser film TH1 FU1 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 ENWW Engine control system 9