Glass Plate Setup and Assembly Manual
Page 25
C
Tests and Troubleshooting
C.1 Troubleshooting
Matrix
Problem Possible
cause
Action
Image is darker than
expected.
The target used for white
balance is much brighter
than the scanning target.
Go to the White Balance function
and modify the Brightness Correction
setting.
Image is brighter than
expected.
The target is much brighter
than the target used for
white balance.
Go to the White Balance function
and modify the Brightness Correction
setting.
Image shows a color shift
towards red (tint)
The target used for white
balance is more blue than
the scanning target.
Go to the RGB adjustments and lower
the gain on red.
Image shows a color shift
towards red (tint)
The scanner receives
significant amounts of
infrared light (sun or spot
lights) not visible to the
human eye.
Change position, close blinds, dim
down or shut off any bright spot lights.
Image shows a color shift
towards blue (tint)
The target used for white
balance is more red than
the scanning target.
Go to the RGB adjustments and lower
the gain on blue.
Image shows areas that are
overexposed and too bright.
The scanner receives too
much ambient light from a
point source like sunlight,
spotlight etc.
Change position, close blinds, dim
down or shut off any bright spot lights.
Image has evenly spaced
vertical stripes or streaks.
50/60Hz interference from
fluorescent ceiling lights.
Change position, dim down or shut off
some lamps, change ceiling lights to
electronic ballasts.
Image has horizontal stripes
or streaks.
Improper white balance.
Exercise the White Balance
procedure.
The image is out of focus on
a flat target with significant
contrast.
The reference focal point
is lost or misaligned.
Exercise the Autofocus
procedure.
The image is out of focus on
the lower portion of the scan
The glass plate is not
horizontal.
Adjust book cradles in a way, that the
glass plate is horizontal.
