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TROUBLESHOOTING GUIDE
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.
All Interfaces
MS6720 Troubleshooting Guide
SYMPTOMS POSSIBLE CAUSE(S) SOLUTION
No LEDS, beep
or motor spin
No power at power up
Check transformer, outlet and
power strip
NOTE: If it’s a direct connect scanner, the problem could be inadequate power
being supplied to the scanner. It may be necessary to use a Metrologic
transformer for power. Check the fuse in the MCA.
3 beeps on
power up
Non-volatile RAM failure
Contact a Metrologic Rep, if
the unit will not hold the
programmed configuration
Continuous razz
tone on power
up
RAM or ROM failure
Contact a Metrologic Rep, if
the unit will not function
Razz tone and
red LED flash at
power up
VLD failure Contact a Metrologic Rep
Razz tone and
both LEDs flash
at power up
Scanner motor failure Contact a Metrologic Rep
Unit scans,
Communicates
and beeps twice
Same symbol timeout set
too short
Adjust same symbol timeout for
a longer time