Metrologic Instruments MS7220 - Manual (Page 26)

23
T ROUBLESHOOTING G UIDE (C ONTINUED )
SYMPTOMS POSSIBLE CAUSE(S) SOLUTION
The unit powers
up, but does
not scan and/or
beep Scanning a particular
symbology that is not
enabled UPC/EAN, Code 39,
interleaved 2 of 5, Code 93,
Code 128 and Codabar 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 scanner has been
programmed for a
character length lock,
or a minimum length
and bar code being
scanned does not
satisfy the
programmed 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 unit scans
a bar code, but
locks up after
the first scan
(red LED stays
on) The scanner is
configured to support
some form of host
handshaking but is not
receiving the signal If the scanner 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 scanner’s data
format does not match
the host system
requirements Verify that the scanner’s
data format matches that
required by the host. Make
sure that the scanner is
connected to the proper
host port
Scanner beeps
at some bar
codes and NOT
for others of the
same bar code
symbology The print quality of the
bar code is suspect
Also check character
length lock.
Check print mode. The type
of printer could be the
problem. Change print
settings. For example
change to econo mode or
high speed
Scanner beeps
at some bar
codes and NOT
for others of the
same bar code
symbology 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. ie change to econo
mode or high speed