Printronix SLPA7000 User Manual page 168

Chapter 5
Troubleshooting Display Messages
Message
300 DPI Head Installed
BAD VFU CHANNEL
Bar Code Improper
Data Format
Bar code quiet
zone too small
168
Table 8. Message List
Explanation
Normal power-up message.
The printer is running its
initialization routine and
indicating the DPI resolution of
the installed printhead.
The user tried to use an
undefined VFU channel.
Data validation error: the bar
code is not properly encoded.
For example, a check sum is
incorrect, a required number of
characters is not met, or the
required terminator characters
are not included. This problem
is almost always caused by
incorrect form or host
application design.
Data validation error: the blank
zone(s) left or right of the bar
code is not big enough to meet
the minimum requirement.
Typically, this occurs in forms
where bar codes are placed too
close to other elements, the bar
code is too close to an edge of
the media, or the media's
position is shifting.
The minimum quiet zone on
each end of the bar code should
be ten times the minimum
element width or 1/4 inch,
whichever is greater. In
addition, between bar codes,
the validator requires a
minimum distance of 20 times
the minimum element width or
1/2 inch, whichever is greater.
Solution
No action required.
Use defined channels.
Fix the application so it sends
data in the correct bar code
format.
1. Fix the application.
2. Disable Quiet Zone in the
VALIDATOR menu.