Density Adjustment During Printing (Scanner Input) - Canon GP605 Service Manual

3.

Density Adjustment during Printing (scanner input)

Potential sensor
Laser
Grid bias
Potential determined
Related Service Mode
COPIER>OPTION>USER>
PM-DENS
(density setting mode on/off during
printing)
Main power switch
Set
OFF/ON
COPIER > OPTION > BODY > PM-DENS
COPYRIGHT © 1999 CANON INC.
Lighter
Darker
Potential control
sequence started.
195˚C
WMUP
VD
Pw
Vg
Vg
Figure 6-213 Sequence of Control
1: correct the target value to enable variation of density
during printing. (default)
0: disable the mechanism used to vary the density during
printing.
Potential control
Copy Start key
ON
Table 6-204 Timing of Control
CANON GP605/605V REV.0 JAN. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 6 IMAGE FORMATION SYSTEM
Laser power
F value
correction value
1
x 0.8
3
x 1.0
5
Density
x 1.2
7
9
x 1.5
The laser power/Vdc is corrected
according to the F setting.
WMUPR
VL
Pw
Vdc
The laser power/Vdc is used
to suit the F value setting.
F setting updated
Vdc
correction value
-20V
200˚C
STBY
6-15