Symbol LS 4208 - Appendix C. Sample Bar Codes; Upc-A

Problem Possible Causes Possible Solutions
Decoding Bar Codes
Scanner emits the laser, but does not decode the
bar
code.
Scanner is not programmed for the correct bar
code
type.
Program the scanner to read that type of bar
code.
See
Chapter
12,
Symbologies
.
Bar code symbol is unreadable. Scan test symbols of the same bar code type
to
determine
if
the
bar
code
is
defaced.
Distance between scanner and bar code
is
incorrect.
Move the scanner closer to or further from the
bar
code.
See
Decode
Zone
on
page
2-10
.
The scan line is not crossing every bar and space
of
the
symbol.
Move the symbol until the scan line is within
the
acceptable
aiming
pattern.
See
Figure
2-3
on
page
2-
Scanner decodes bar code, but does not transmit
the
data
to
the
host.
Scanner is not programmed for the correct
host
type.
Scan the appropriate host type programming
bar
code.
See
the
chapter
corresponding
to
the
host
Interface cable is loose. Check for loose cable connection and
re-connect
cable.
Scanner emits five long low beep after a bar code
is
decoded.
Conversion or format error was detected.
The scanner ’ s conversion parameters are
not
properly
configured.
Ensure the scanner ’ s conversion parameters
are
properly
configured.
Conversion or format error was detected.
An ADF rule was set up with characters that
can't
be
sent
for
the
host
selected.
Change the ADF rule, or change to a host that
can
support
the
ADF
rule.
Conversion or format error was detected.
A bar code was scanned with characters that
can't
be
sent
for
that
host.
Change the bar code, or change to a host that
can
support
the
bar
code.
Host Displays
Host displays scanned data
incorrectly.
Scanner is not programmed to work with the
host.
Ensure the proper host is selected.
Scan the appropriate host type programming
bar
code.
For RS-232, set the scanner's
communication
parameters
to
match
the
host's
For a USB HID keyboard or Keyboard
Wedge
configuration,
program
the
system
for
the
correct
keyboard
type
and
language,
and
turn
off
the
Program the proper editing options (e.g., ADF,
UPC-E
to
UPC-A
Conversion).
Check the scanner ’ s host type parameters or
editing
options.
Trigger
Nothing happens when the trigger is
pulled.
No power to the scanner. Check the system power. If the configuration
requires
a
power
supply,
re-connect
the
power
Interface/power cables are loose. Check for loose cable connections and
re-connect
cables.
3-4
LS
4208
Product
Reference
Guide
Table
3-1.
Troubleshooting
(Continued)