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30
TROUBLESHOOTING GUIDE
Symptoms Possible Causes Solution
Alpha
characters show
as lower case.
The computer is in
Caps Lock mode.
Enable the Caps Lock detect
feature of the scanner to detect
whether the PC is operating in
Caps Lock.
Everything
works except for
a couple of
characters.
These characters
may not be supported
by that country’s key
look up table.
Try operating the scanner in Alt
mode.
The unit
powers-up OK
and scans OK
but does not
communicate
properly to the
host.
The com port at the
host is not working or
not configured
properly.
Check to make sure that the baud
rate and parity of the scanner and
the communication port match
and that the program is looking for
“RS-232” data.
The unit
powers-up OK
and scans OK
but does not
communicate
properly to the
host.
The cable is not
connected to the
proper com port.
Check to make sure that the unit
is connected to the correct com
port on the host device.
The host is
receiving data
but the data
does not look
correct.
The scanner and host
may not be
configured for the
same interface
parameters.
Check that the scanner and the
host are configured for the same
interface parameters.
Characters are
being dropped.
Inter-character delay
needs to be added to
the transmitted
output.
Add some inter-character delay to
the transmitted output by using
the MetroSelect Single-Line
Programming Guide.
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