C Tests And Troubleshooting - Image Access WideTEK 25 Operation Manual

C Tests and Troubleshooting
C.1 Troubleshooting Matrix
Fields with a light blue background need the Poweruser access level. All other fields are
available to all users.
Problem
The touch panel does not
show the stand-by message.
Touching the touch panel
does not power up the
device.
Touching the STOP button
on the touch panel does not
power down the device.
Image is darker than
expected.
Image is brighter than
expected.
Image has vertical stripes or
streaks.
Image shows a color shift
towards red (tint)
Image shows a color shift
towards blue (tint)
Image shows a color shift
towards red (tint)
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Possible cause
No power
Connector failure, software
glitch ...
Internal software hangs,
application hangs ...
The target used for white
balance is much brighter
than the scanning target.
The document is much
brighter than the target
used for white balance.
Improper white balance.
The target used for white
balance is more blue than
the scanning target.
The target used for white
balance is more red than
the scanning target.
The scanner receives
significant amounts of
infrared light (sun or spot
lights) not visible to the
human eye.
Action
Check main outlet, power cord, power-
on switch on the left side of the device.
Switch power off for at least 10
seconds. Retry after touch panel is
illuminated again.
End all applications and retry. If
problem persists, touch the STOP
button for at least 10 seconds. Power
up again.
Go to the Adjustments function and
modify the Brightness
Correction setting.
Go to the Adjustments function and
modify the Brightness
Correction setting.
Exercise
the White Balance procedure.
Go to the RGB adjustments and lower
the gain on red.
Go to the RGB adjustments and lower
the gain on blue.
Change position, close blinds, dim or
shut off any bright spotlights.
Manual