F. Controlling the Static Eliminator Bias1. OutlineFigure 4-114 shows the circuit that controls the static eliminator bias; the circuit hasthe following functions:• turns on and off the static eliminator bias and controls the voltage to a constantlevel• switches the static eliminator bias voltage levelFigure 4-114COPYRIGHT © 1997 CANON INC. CANON NP6218 REV. 0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)CHAPTER 4 IMAGE FORMATION SYSTEM4-16Composite power supply PCBMain transformerT101JLVCTL JCTLMPWMMicroprocessor(Q512)J21111~15J2101~6J302J301Microprocessor(Q301)Transformer(T101)drive circuitStatic eliminatorbias drivecircuit TransformercircuitDC controller PCBPhotosensitive drumStaticeliminator
