Figure 1-6 Fuser control system AC input ENWW Engine control system 11 Low-voltage power supply DC controller Zerocross ZEROX circuit High-voltage power supply RL101 RLD Relay drive circuit RL102 FSRD1 Fuser heater FSRD2 control circuit Current Fuser heater safety circuit detection FSRCUR circuit Fuser control circuit MFSRTH S1FSRTH S2FSRTH S3FSRTH Fuser Fuser film ass’y TH2 TH1 TH3 TH4 FU1 H1/H2 Pressure roller Fuser film ass’y TH2 TH1 TH3 TH4 FU1 H1/H2 Pressure roller Zerocross circuit RL101 Relay drive circuit RL102 Fuser heater control circuit Current Fuser heater safety circuit detection circuit Fuser control circuit FSRD1 FSRD2 TH1 TH4