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CHAPTER 5 TROUBLESHOOTING
2. Light Adjustment
3) Select [Light Adjustment] from the main
menu screen. This mode performs fine adjustments on
the shading correction values since the
reading point differs between the white
reference sheet inside of the reading unit
and the actual document.
If the scanned image quality is degraded,
perform this adjustment. Also perform this
adjustment after replacing the reading unit or
after replacing the control PCB recording the
adjustment data.
Figure 5-215
Adjustment sheet
The shading sheet is required to execute
this mode. Use TKM-0326 or TKM-0332,
which is the same shading sheet as the
one used for the DR-2010C/2510C or
others. Do not use a sheet with any dirt
or creases.
4) A screen is displayed to check the
adjustment sheet. Check that the sheet is
placed correctly and select [OK].
Operation Procedure
1) Clean feed path, roller, and reading
glass.
Figure 5-216
2) Set the feed selection lever to “none
separate”.
Place a shading sheet to fit the width
between the document guides.
Note: If the feed selection lever is not set to
the “none separate”, a confirmation
screen is displayed. Set the lever to
“none separate” and then select [OK]
in the screen.
Figure 5-217
Figure 5-214
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CANON ELECTRONICS INC. 2011 CANON DR-M140 FIRST EDITION
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