Fuser Control
The fuser is heated by the heater lamp, which is powered by AC voltage. When the power supply board receives a FUSER LAMP signal from the engine controller board (PWB-A), the power supply board (PWB-E) supplies the AC voltage to the heater lamp. This AC voltage is cut by the interlock switch when the case is open.
The fuser temperature is detected by the thermistor. Based on the TH1 signals from the thermistor, the engine controller board (PWB-A) controls the fusing temperature (165° C, 329" F) using the FUSER LAMP signal.
Engine Controller Board
CN11A THERMISTOR +5V
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