Metrologic Instruments MS2421 - Manual (Page 44)

40
T ROUBLESHOOTING
Symptom Possible Cause(s) Solution
All Interfaces
The print quality of the bar
code is suspect.
Check the character length
lock.
Scanner beeps at some
bar codes and NOT form
others of the same bar
code symbology.
The aspect ratio of the bar
code is out of tolerance.
The type of printer and/or the printer settings could be the
problem.
Check the print mode or change the printer settings. For
example change to econo mode or high speed.
The unit is trying to scan a
particular symbology that is
not enabled.
UPC/EAN and Code 128 are enabled by default. Verify that
the type of bar code being read has been selected.
The unit powers up but
does not scan and/or
beep.
The unit has been
configured for a character
length lock or a minimum
length and the bar code
being scanned does not
satisfy the configured
criteria.
Verify that the bar code that is being scanned falls into the
criteria.
Typical of Non-UPC/EAN codes. The scanner defaults to a
minimum of 4 character bar code.
The bar code may have
been printed incorrectly.
Check if it is a check digit, character or border problem.
The scanner is not
configured correctly for this
type of bar code.
Check if check digits are set properly.
The unit beeps at some
bar codes but 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.
RS232 Only
The com port at the host is
not working or is not
configured properly.
The cable is not connected
to the proper com port.
The unit powers up OK
and scans OK but does
not communicate properly
to the host.
The com port is not
operating properly.
Check to make sure that the baud rate and parity of the
scanner and the communication port match and the program is
looking for RS232 data.