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Symptoms Possible Causes Solution
The unit scans
but the data is
not 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.
The following item is only relevant for an RS232 interface.
The unit powers
up OK and scans
OK but does not
communicate
properly with 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
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.
Add some inter-character delay
to the transmitted output by
using the Configuration Guides
(PN 00-02544 and 00-05252).
The following item is only relevant for a USB interface.
No LEDs, beep
or illumination.
The USB host may not be
active.
The MS4980 will not
operate from hub/host
power without host
communication.
Turn on the host device.
The unit is not receiving
sufficient power to support
operation.
Refer to the electrical
specifications on page 26.
Verify adequate power is being
supplied to the scanner.