Chapter 2: Operation 2-5
Correcting Scanner Problems
Problem
Status
Indicator Tone
Possible
Cause
Corrective Action
Scanner does
not operate
Red Off
Green Off
Off No power to the
unit
Check electrical outlet for proper
power.
Scanner does
not operate
Red Flashing
Green
Flashing
Off Sleep mode Pass anything in front of the
Motion Detector.
Scanner does
not operate
Red Flashing
Green Off
Off Communications
is IBM 468x/9x
and scanner is
off-line
Verify that the IBM terminal is
turned on.
Verify that the IBM terminal is
recognizing the NCR 7872.
Verify that the Interface Cable is
properly connected.
Scanner does
not read tags
Red Flashing
Green Off
Off
Internal failure
Remove power from the NCR
7872 and then supply
power again. If the
problem is not corrected,
have scanner repaired.
Scanner does
not read tags
Red Flashing
Green Off
Off
Communications
is IBM 468x/9x
and scanner is
disabled due to
command from
terminal
Log on to the IBM terminal or
clear NOF item.
Scanner reads
only two tags
Red On
Green Off
Off
NCR 7872 is not
communicating
with host
terminal
Verify that the Interface Cable is
properly connected.
Remove power from the NCR
7872 and then supply
power again. If the
problem is not corrected,
have scanner or host
terminal repaired.
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