Potential Control For Transparency Mode - Canon imageRUNNER 7095 Service Manual

7.4.8 Potential Control for Transparency Mode

To prevent detachment of toner in high-density areas of a transparency print, the machine decreases the
contrast to reduce the toner deposit. To that end, the machine executes potential control for transparency
mode, thus determining the target value for transparency mode.
Potential sensor
Laser
Grid bias
Selected potential
SERVICE MODE:
- COPIER> OPTION> BODY> OHP-CNT (enabling/disabling potential control for transparency
mode)
1: uses the target value obtained as a result of potential control for transparency mode executed at time of
transparency mode operation. (default)
0: does not execute potential control for transparency mode.
Main power switch
OFF/ON
Set
COPIER > OPTION > BODY > OHP-CNT
Potential control sequence started
193
WMUP
WMUPR
VD
Vg
Vg
Potential control
sequence started
VD VL
correction value correction value
-130V
Uses the target VLohp for transparency mode
to execute potential control sequence.
Potential control for
transparency mode started
VL
VLohp
Pw
Pwohp
Pw Pwohp
Vdc
F-7-12
Transparency mode
potential control
F-7-13
Chapter 7
Vdc
correction value
-110V
-40V
198
STBY
Laser power for transparency
mode determined
0010-8046
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