Metrologic Instruments MS1890 User Manual

Page 25

ROUBLESHOOTING

UIDE

Symptoms

Possible Causes

Solution

The unit is
transmitting
each character
twice.

The configuration is
not set correctly.

Increase interscan code delay
setting. Adjust whether the F0
break is transmitted. It may be
necessary to try this in both
settings.

Alpha
characters show
as lower case.

The computer is in
Caps Lock mode.

Enable Caps Lock detect setting
of the scanner to detect if 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 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 the program is looking for
“RS232” data.

The unit powers
up OK and scans
OK but does not
communicate
properly with the
host.

The cable is not
connected to the
correct com port.

Check to make sure that the cable
is connected to the correct com
port.

Characters are
being dropped.

Inter-character delay
needs to be added to
the transmitted output.

Modify the scanner’s configuration
to add some inter-character delay
to the transmitted output.