User's Manual

17
Quick Reference
Cannot see
characters on
display.
PDT 7500 not
powered on.
Press the PWR key.
Contrast not ad-
justed properly.
Press the blue FUNC key and
then the Dark or Light keys to
adjust contrast.
Scanner does
not power on
when the scan
button is
pressed.
Scanner is not
enabled.
See your System Administrator.
Scanner does
not decode a
bar code.
Bar code is un-
readable.
Verify that the bar code is not
defective, i.e., smudged or bro-
ken.
Scan window is
dirty.
Clean scan window with a lens
tissue. Tissues for eyeglasses
work well. Do not use tissues
coated with lotion.
Scan code not
enabled.
See your System Administrator.
Problem Cause Solution
PRELIMINARY