Operation; Turning On And Off The Ac; Sequence Of Operations (Developing Bias) - Canon NP6330 Service Manual

3. Turning On and Off the AC Component of the Developing Bias
The DC component of the developing bias is turned on and off by the developing AC
bias ON command (ACON*) generated by the DC controller.
• When the AC component of the developing bas is on,
ACON*=0
The remote circuit turns on.
The AC drive circuit turns on.
When the AC high-voltage transformer is on, a voltage of 1300 Vp-p is applied.
• When the AC component of the developing bias is off,
ACON*=1
The remote circuit turns off.
The AC drive circuit turns off.

4. Sequence of Operations (developing bias)

Power switch
ON
WMUP
Main motor (M1)
Developing bias AC
component
Developing bias DC
component
DC back bias
Reference:
The copier allows changing of the copy density manually during continuous copying

operation.

The copy density is determined as soon as the scanning lamp turns on, and the
new density will be effective for the next copy.
COPYRIGHT © 1997 CANON INC.
The AC high-voltage transformer turns on. (developing AC bias
output)
The AC high-voltage transformer turns off.
COPY START key
ON
WMUPR STBY INTR
Figure 4-110
CANON NP6330 REV.0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 4 IMAGE FORMATION SYSTEM
SCFW SCRV SCFW
STBY
SCRV LSTR
4-13