Canon PIXMA MX870 - Manual (Page 1013)

Advanced Guide > Troubleshooting > Problems with Scanning > Slow Scanning Speed
Slow Scanning Speed
Check 1: To view the image on a monitor, set the output resolution to
around 150 dpi. To print, set it to around 300 dpi.
Resolution
Check 2: Set Fading Correction, Grain Correction, etc. to None.
Image Settings
Check 3: In MP Navigator EX, deselect the Correct slanted document /
Detect the orientation of text documents and rotate images checkbox and
scan again.
Scan Settings Dialog Box (Photos/Documents)
Scan Settings Dialog Box (Stack of Documents (ADF))
Scan Settings Dialog Box (One-click Mode Screen)
Scan Settings Dialog Box (Scanner Button Settings)
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