Metrologic MS7600 Horizon series Service Manual page 20

TROUBLESHOOTING GUIDE (CONTINUED)
SYMPTOMS
The unit powers up, but
does not scan and/or beep
The unit scans a bar code,
but locks up after the first
scan (red LED stays on)
The unit scans, but the data
transmitted to the host is
incorrect
Scanner beeps at some bar
codes and NOT for others
of the same bar code
symbology
POSSIBLE CAUSE(S)
Scanning a particular symbology
that is not enabled
The scanner has been
programmed for a character
length lock, or a minimum
length and the bar code being
scanned does not satisfy the
programmed criteria.
The scanner is configured to
support some form of host
handshaking but is not receiving
the signal
The scanner's data format does
not match the host system
requirements
The print quality of the bar code
is suspect
Check the character length lock.
The aspect ratio of the bar code
is out of tolerance
7-11
SOLUTION
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
Verify that the bar code being scanned falls into
the programmed criteria. (Typical of Non-
UPC/EAN codes. The scanner defaults to a
minimum of 4 character bar code.)
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
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
Check print mode. The type of printer could be
the problem. Change print settings. For example
change to econo mode or high speed