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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

IS6520/MS6520 Series Troubleshooting Guide

SYMPTOMS POSSIBLE CAUSE(S) SOLUTION
No LEDs, beep
or motor spin
No power is being
supplied to the
scanner
Check transformer, outlet and
power strip. Make sure the cable
is plugged in to the scanner
No LEDs, beep No power is being
supplied to the
scanner front host
Some host system’s cannot
supply enough current to power
Omni-Quest. Use the power
supply included with the scanner.
3 beeps on
power up
Non-volatile RAM
failure
Contact a Metrologic
Representative, if the unit will not
hold the programmed
configuration
Continuous
razz tone on
power up
RAM or ROM failure Contact a Metrologic
Representative, if the unit will not
function
Razz tone and
green LED
flash at power
u
p
VLD failure Contact a Metrologic
Representative
Razz tone and
both LEDs
flash at power
up
Scanner motor failure Contact a Metrologic
Representative
Unit scans,
Communicates
and beeps
twice
Same symbol timeout
set too short
Adjust same symbol timeout for a
longer time