User Guide

3–44

OPERATIONS AND TIMING

1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)

F. Controlling the Static Elimi-

nator Bias

1. Outline

Figure 3-307 show the circuit that controls the

static eliminator bias, and the circuit has the following

functions:

• Turns ON/OFF the static eliminator bias and

controls it to a constant voltage.

• Switches the static eliminator bias voltage

level.

Figure 3-307

Composite power supply PCB

JLVCTL JCTL

Microprocessor

J307

Q301

Microprocessor

Static eliminator

bias drive

circuit

24V

Transformer

circuit

DC controller PCB

Photosensitive

drum

Static

eliminator

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