Metrologic Instruments MS2421 - Manual (Page 43)

39
T ROUBLESHOOTING
The following guide is for reference purposes only. Contact a Metrologic representative at 1-800-ID-METRO or 1-800-436-
3876 to preserve the limited warranty terms.
Symptom Possible Cause(s) Solution
All Interfaces
No LED, beep or motor
spin. No power is being supplied
to the scanner. Check the transformer, outlet and the power strip. Make sure
the power cable is plugged into the scanner.
During power up the unit
beeps 3 times.
A Non-volatile RAM failure.
Contact a Metrologic service representative, if the unit will not
hold the configuration.
During power up the unit
razzes continuously.
A RAM or ROM failure.
Contact a Metrologic service representative, if the unit will not
function.
During power up the unit
razzes once and the blue
LED flashes.
A VLD failure. Contact a Metrologic service representative.
During power up the unit
razzes twice and blue
LED flash.
Scanner motor failure. Contact a Metrologic service representative.
There are
multiple scans upon
presentation of code.
The same symbol timeout is
set to short.
Adjust same symbol timeout for a longer time.
The beeper is disabled. Enable the beeper.
No volume is selected. Select a volume.
The unit powers up but
does not beep.
No tone is selected. Select a tone.
The unit is trying to scan a
particular symbology that is
not enabled.
UPC/EAN and Code 128 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 unit has been
configured for a character
length lock or a minimum
length and the bar code
being scanned does not
satisfy the configured
criteria.
Verify that the bar code that is being scanned falls into the
criteria.
Typical of Non-UPC/EAN codes. The scanner defaults to a
minimum of 4 character bar code.
The unit scans a bar code,
but locks up after the first
scan (the blue 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,
XON/XOFF or D/E, 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.