Metrologic Instruments MS1890 - Manual (Page 23)

19
T
ROUBLESHOOTING
G
UIDE
Symptoms Possible Causes Solution
The unit powers
up, but does not
beep when bar
code is scanned.
The beeper is
disabled and no tone
is selected.
Enable the beeper and select a
tone.
The unit powers
up, but does not
scan and/or
beep. The bar code
symbology trying to
be scanned is not
enabled.
UPC/EAN, Code 39, interleaved 2
of 5, Code 93, Code 128, Codabar
and PDF 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 is trying
to scan a barcode that
does not match the
configured criteria. Verify that the bar code being
scanned falls into the configured
criteria (i.e. character length lock or
minimum bar code length settings).
The unit scans
a bar code, but
locks up after
the first scan
and the white
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, or
XON/XOFF, 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.