Density (Auto) - Canon imageFORMULA DR-G2140 Service Manual
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CHAPTER 5 TROUBLESHOOTING
4. Density (Auto)
This automatically adjusts the density of
front and back images. It measures the aver-
age density of the adjustment sheet and de-
rives the value to adjust by.
At first, a front side is adjusted, and then
a back side is adjusted.
Adjustment sheet
Use a special adjustment sheet; TKM-
0347 (QT-28).
Figure 5-241
Operation Procedure
1) Clean feed path, rollers, and scanning
glass.
2) Place the color chart on the top edge and
set the adjustment sheet with front side up.
Make sure to set the document guides so
they are fit with the adjustment sheet to
prevent skews.
Figure 5-242
5-24
COPYRIGHT © CANON ELECTRONICS INC. 2018
3) Select [Density (Auto)].
Figure 5-243
4) The adjustment sheet is fed. Once ejected
a confirmation screen appears for "back-
side" adjustment.
Figure 5-244
5) Set the same adjustment sheet with back
side up, and select [OK].
Figure 5-245
6) The adjustment sheet is fed/ejected again.
Adjustment is now completed, and the pro-
gress screen disappears.
For market items, perform this adjust-
ment for density faults (including differ-
ences in front and back densities), or af-
ter replacing the control PCB.
CANON DR-G2140/G2110/G2090 FIRST EDITION
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Troubleshooting
