Determining The Optimum Developing Bias - Canon GP605 Service Manual

CHAPTER 6 IMAGE FORMATION SYSTEM
F.

Determining the Optimum Developing Bias

An optimum developing bias (Vdc) is computed based on the optimum drum surface potential
(VD).
Vdc is computed based on this VD;
Vdc = VD - Vback (120 V)
Potential sensor
Laser
Grid bias
Potential determined
6-10
COPYRIGHT © 1999 CANON INC.
195˚C
WMUP
Optimum grid
bias determined
Potential control sequence started
Figure 6-208 Sequence of Operations
CANON GP605/605V REV.0 JAN. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Potential sensor
Vg
VD
Photosensitive drum
WMUPR
VD VL
Optimum laser output
determined
Pw
Vg Vg
Pw
Vdc
Vdc
Developing
cylinder
200˚C
STBY