Panasonic UF-585 Service Manual page 207

Fuser Lamp Drive Circuit
The Fuser Lamp is powered by 220 VAC (115 VAC). It is driven by the LVPS and controlled by the nSSR signal from the SCA/
SCB PC Board. When the CN33, Pin10 (nSSR) on the LVPS goes LOW, the Fuser Lamp turns ON. This lights up the PC301
LED and activates the CR301 photo-triac, and VAC 115 VAC is sent to the Fuser Lamp. The time at which CR301 is actually
activated depends on the 220VAC (115 VAC) sine wave. When the cross-voltage for Pin 6 and Pin 4 of PC301 is other than 0
Volts (sine wave exceeds 0 volts), PC301 inhibits the activation of the triac and turns ON the Fuser Lamp.
C301
R303
R304
Fuser Lamp Drive Circuit Diagram
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