causes. In the example above, the current modulation would need to be checked, and the pressure,
the Velocity Of Drop, and the operation of the ink system components investigated. These
additional pieces of information will then enable you to decide which of the possible causes is the
reason for the print fault.
The following list classifies faults by the appearance of the print sample they produce. The list
shows print samples of the standard test pattern which can be compared with samples taken from
the printer under investigation. Below each sample, or set of samples, is a brief description of fault
symptoms. Also provided are the possible causes of the fault ans a reference to a particular fault
code number in the “Problem Solving - Print Samples” part, where the problem and its method of
rectification is described in more detail.
NOTE: Throughout this manual, reference to the “top” of the print means the part of the pattern
closest to the negative deflector plate of the print head (i.e. the least deflected drop).
Identifying Faults by Print Sample:
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