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20
TROUBLESHOOTING GUIDE (CONTINUED)
All Interfaces
IS6520/MS6520 Series Troubleshooting Guide (continued)
SYMPTOMS POSSIBLE CAUSE(S) SOLUTION
The unit
powers up, but
does not
scan and/or
beep
Beeper disabled. No
tone selected
Enable beeper. Select tone
The unit
powers up, but
does not scan
and/or beep
Scanning a particular
symbology that is not
enabled
UPC/EAN, Code 39, interleaved
2 of 5, Code 93, Code 128 and
Codabar 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 scanner has been
programmed for a
character length lock, or
a minimum length and
bar code being scanned
does not satisfy the
programmed 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
(red 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
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