Xerox 6100BD - Phaser Color Laser Printer, Fundamentals

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Problem solving
Generic MICR Fundamentals Guide 7-5
Application software
Any application change should be reason for a thorough
inspection. Although new applications must be thoroughly tested
before MICR documents are issued, subtle application changes
can have an impact on MICR document performance. Some
problems, such as a new authorized signature that extends into
the MICR clear band, are easy to detect. Others, such as a
MICR font change, may require sophisticated tools to identify. If
the change coincides with a reject rate problem, you should
revert to the prior version for testing.
Unknown cause
When the cause of a rejection rate problem cannot be
determined, or the initial corrective actions prove ineffective, a
dual approach is indicated. Additional attention to printing and
processing details may uncover the cause. In addition, institute
an active reader sorter testing program to replicate the problem
under controlled conditions. You should also closely examine the
four areas of investigation discussed earlier in this chapter.
Reader sorter testing
Reader sorter qualification testing must occur under a controlled
set of circumstances for accurate results. The results from a
single reader sorter test can vary significantly, depending on:
• Printing conditions
• Reader sorter model
• Adjustment of the reader sorter
• Statistical design of the test
A valid qualification test should meet these conditions:
• The reader sorter is adjusted to manufacturer specifications
and is cleaned regularly by the operator according to the
manufacturer's recommendation.
• Process a large group of documents, several thousand at a
time.
• Acquire reject performance data for the particular reader
sorter that is used for the test.
• Fan documents before placing them in the reader sorter for
each pass.