Metrologic Instruments MS9544 - Manual (Page 34)

30
T ROUBLESHOOTING G UIDE
Symptoms Possible Causes Solution
The unit scans a
bar code, but locks
up after the first
scan and the white
LED stays on. The unit is configured
to support some form
of host handshaking,
but is not receiving
the signal. If the unit is setup to support
ACK/NAK, RTS/CTS, XON/XOFF
or D/E, verify that the host cable
and host are supporting the
handshaking properly.
The unit scans,
but the data
transmitted to the
host is incorrect. The unit’s data format
does not match the
host system’s
requirements.
Verify that the unit’s data format
matches that required by the
host. Make sure that the
scanner is connected to the
proper host port.
The print quality of the
bar code is suspect.
The aspect ratio of
the bar code is out of
tolerance.
Check print mode. The type of
printer could be the problem.
Change print settings.
i.e. change to econo mode or
high speed.
The bar code may
have been printed
incorrectly.
The unit is not
configured correctly for
this type of bar code.
Check if it is a check
digit/character/or border
problem.
The unit beeps at
some bar codes
and NOT for others
of the same bar
code symbology.
The minimum symbol
length setting does not
work with the bar code.
Check if the correct minimum
symbol length is set.
The unit scans the
bar code but there
is no data. Make sure the scanner is
configured for the appropriate
mode.
The unit scans but
the data is not
correct.
Make sure that the proper PC
type, AT or PS2, is selected.
Verify correct country code and
data formatting are selected.
Adjust inter-character delay
symptom.
The unit is
transmitting each
character twice.
The configuration is
not set correctly.
Increase interscan code delay
setting. Adjust whether the F0
break is transmitted. It may be
necessary to try this in both
settings.