7.13. HEAT LAMP CONTROL CIRCUIT
The temperature of the fixing part of the Fixing Unit is converted to a voltage by THERMISTER
and input to IC604-Y6 (analog input). The heater turns ON/OFF the photo-coupler PC101 at the
heater control port (IC610-80pin), and is turned ON/OFF at the triac CR101. And a thermostat
and a thermo fuse are set on the AC line as the safety devices.
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