Heat Lamp Control Circuit - Panasonic KX-FLB758RU Service Manual

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.
1. Control at Printing
a. After the printing signal is received, turn ON the heater.
b. After that, turn ON the motor at the temperature T1 (about 125°C).
c. After that, control at the temperature T2 (about 180°C), and after the fixing stable time tf has passed, feed papers at the
paper feeding permission time t3.
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KX-FLB758RU