Outline; Controlling The Developing Bias - Canon NP6330 Service Manual

F. Controlling the Developing Bias

1. Outline

Figure 4-108 shows the circuit used to control the developing bias, and the circuit
has the following functions:
Turning on and off the DC component of the developing bias.
Controlling the voltage level of the DC component of the developing bias.
Turning on and off the AC component of the developing bias.
J114 J401
ACON
-7B -7
*
DC
controller
PCB
-6B DPON -8
*
DCBC -2
-12B
COPYRIGHT © 1997 CANON INC.
Remote
AC drive circuit
circuit
Remote
circuit
Amplifier
circuit
High-voltabe transformer (HVT)
Figure 4-108
CANON NP6330 REV.0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 4 IMAGE FORMATION SYSTEM
AC high-voltage
transformer
DC high-voltage
transformer
DC drive circuit
Dp
Developing
cylinder
Photosensitive
drum
4-11