Printronix H-SERIES P7000 - Manual (Page 128)

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Chapter 7 Diagnosing Problems
Diagnosing Problems
This section is designed to help you fix problems which may arise with normal
printer operation.
Bar Code Verification
The most important consideration when printing a bar code is to ensure that
the bar code will be scanned properly. Incorporating a bar code quality
procedure in the printing process is the best way to ensure that bar codes are
being printed correctly. A properly implemented verification procedure will
increase overall bar code quality, reduce waste from misprinted bar codes,
and achieve high first-time read rates. A high first-time read rate is an
increasingly important factor in newer, more efficient systems where manually
entered data is not acceptable as a backup function. Verification also
minimizes the costs of returned products due to poor reading or
unaccountable bar codes.
RJS designs and manufactures the world’s most complete line of bar code
verification products, including their portable Inspector and Laser Inspector
models, On-Line Inspector and AutoScan II series. For more information on
RJS bar code verifiers, visit their web site at www.rjs1.com.
Printing A Hex Dump
A hex code printout (or hex dump) is a translation of all host interface data to
its hexadecimal equivalent, listing all ASCII character data received from the
host computer with their corresponding two-digit hexadecimal codes. Hex
dumps are used to troubleshoot printer data reception problems.
Printable characters print as the assigned symbol; nonprintable characters
are indicated by a period (.).
Figure 28 shows an example of a hex dump.