Canon IMAGERUNNER 7095 PRINTER, Руководство по обслуживанию

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Chapter 7
7-10
7.4.9 Target Potential Correction in Each Mode
0010-8048
For the following, the machine corrects the laser power/developing bias determined as part of potential
control, using the result as the target value for the individual modes:
T-7-2
1. Adjusting the Density during Printing (PDL input)
F-7-14
SERVICE MODE:
- COPIER> OPTION> BODY> CNT-W/PR
(enabling/disabling density variable mode during printing)
0: corrects the target value to permit variation of density during printing. (default)
1: does not permit variation of density during printing.
F-7-15
Purpose Correction
Density adjustment
during printing (PDL
input) To enable reproduction of fine lines suited to
the needs of the user (PDF data from a PC). Corrects the laser power/developing bias
to suit the F value setting.
Density adjustment
during printing (scanner
input) To enable a specific level of density suited to
the needs of the user. Corrects the laser power/developing bias
to suit the F value setting
WMUPR WMUP STBY
193
198
Potential sensor
Laser
Grid bias
Vg
Vg
Pw
Pw Vdc
Potential control
sequence started
VD
VL
Selected potential
VD
correction
value
Vdc
correction
value
1
2
3
4
5
6
7
8
9
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.2
1.2
+40V
+20V
F
value
Density
Darker
Lighter
Increases the laser power
(i.e., increasing the contrast)
to enable reproduction of fine lines,
each as wide as the diameter of a
single toner particle.
Laser power
correction
value
The laser power reaches the upper limit,
causing the machine to correct the
developing bias and to increase the
contrast.
Corrects the laser power/developing
bias to suit the F value setting.
COPIER > OPTION > BODY > CNT-W/PR
Set
Potential
control Printing
started
Main power switch
OFF/ON
F value
changed
A laser power output Vdc
suited to the F value setting
is used.