Hitachi PB - Disordered Characters

6-42
6.5.5 Disordered characters
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※NOTICE
Do not repeat the nozzle backwash procedure more than two times.
If it is repeated to an excess, the ink becomes thin, thereby causing
disordered prints. If the ink is thin and disordered prints are
encountered, replace the ink.
Disordered
characters
A
re the upper or
lower print dots
lost?
No
Y
es
Is the upper end of
the print blotted?
No
Y
es
Adjust the excitation voltage
and pressure to ensure
proper ink particle
generation.
A
re ink particles
properly generated?
Y
es
No
See under “Chipped
print”.
Ensure that the operating
temperature is within the
specified limits.
Is the operating
temperature with the
specified limits?
Y
es
No
Ensure that the work surface is
free from coating application
irregularities, water drops, dirt,
oil, and other foreign matter.
Resume the
operation.
A
re normal prints
obtained?
No
Y
es
Replace the ink.
A
re normal prints
obtained?
No
Y
es
The ink flow path may be
clogged: Clean the filter and
joint, perform reverse cleaning
of nozzle, and then disassemble
the nozzle and clean it.