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Troubleshooting
The following guide is for reference purposes only. Contact a customer service representative to preserve the
limited warranty terms.
Symptom Possible Cause(s) Solution
All Interfaces
No LEDs, 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.
No LEDs and no beep.
No power is being
supplied to the scanner.
The host system cannot supply enough current to
power the MS2420 series scanner. Use the power
supply included with the scanner.
During power up the
unit beeps three times.
A non-volatile RAM
failure.
Contact a customer service representative, if the unit
will not hold the configuration.
During power up the
unit razzes
continuously.
There has been a
diagnostic failure.
Contact a customer service representative, if the unit
will not function.
During power up the
unit razzes once.
A VLD failure. Contact a customer service representative.
Scanner motor failure. Contact a customer 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 unit powers up but
does not beep.
The beeper is disabled. Enable the beeper.
No volume is selected. Select a volume.
No tone is selected. Select a tone.
The unit powers up but
does not scan and/or
beep.
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 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.