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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
All Interfaces
No LEDs, beep or motor
spin.
No LEDs and no beep.
During power up the
unit beeps three times.
During power up the
unit razzes
continuously.
During power up the
unit razzes once.
There are multiple
scans upon
presentation of code.
The unit powers up but
does not beep.
The unit powers up but
does not scan and/or
beep.
Possible Cause(s)
No power is being
supplied to the scanner.
No power is being
supplied to the scanner.
A non-volatile RAM
failure.
There has been a
diagnostic failure.
A VLD failure.
Scanner motor failure.
The same symbol
timeout is set to short.
The beeper is disabled.
No volume is selected.
No tone is selected.
The unit is trying to scan
a particular symbology
that is not enabled.
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.
Solution
Check the transformer, outlet and the power strip.
Make sure the power cable is plugged into the
scanner.
The host system cannot supply enough current to
power the MS2420 series scanner. Use the power
supply included with the scanner.
Contact a customer service representative, if the unit
will not hold the configuration.
Contact a customer service representative, if the unit
will not function.
Contact a customer service representative.
Contact a customer service representative.
Adjust same symbol timeout for a longer time.
Enable the beeper.
Select a volume.
Select a tone.
UPC/EAN and Code 128 are enabled by default.
Verify that the type of bar code being read has been
selected.
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.
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