System Description
Fuser Lamp Drive Circuit
The Fuser Lamp is powered by 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 VAC 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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