Printronix T5000e Series Module Manual page 70

Chapter 2
Troubleshooting
Table 5. Troubleshooting the Validator
Symptom
The printed labels look clean, but
the validator is still reporting an
error message.
The printed bar codes are
causing error conditions.
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Solution
The validator glass may be dirty, distorting the
report results. Power down the printer and clean
the glass using a household glass cleaner and a
dry, lint-free cloth.
There are a number of factors which could be
causing validation errors:
The scanning beam is not properly aligned
•
with the two notches on the tear bar of the
printer. See "Adjust The Scanning Beam" on
page 28.
• Make sure the entire bar code passes
completely under the scanning beam.
• The validator and printer are not properly
communicating. Test the validator operation
without using a host. See "Bar Code
Validation Demo Page" on page 36.
Bar code width. The validator can recognize
•
x-dimensions as narrow as 6.6 mil for
300 dpi printers, and 10 mil for 203 dpi
printers. The validator cannot recognize
x-dimensions smaller than 6.6 mil or larger
than 40 mil.
• Bar code size. A minimum height of 1/8 inch
is required for validation.
• Bar code type. The validator only
recognizes the following linear, picket fence
bar codes: Codabar, Code 39, Code 93,
Code 128, Interleaved 2 of 5, and UPC/EAN
+ add-ons. Stacked, 2D, and vertical
(ladder) bar codes are not supported.