Hitachi PB - Increased Character Distortion

6-41
6.5.4 Increased character distortion
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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.
Increased character
distortion
Optimize the clearance
between the nozzle head
end and print target.
Y
es
Is optimum clearance
provided between the
nozzle head end and print
target?
No
Is the ink pressure
within the specified
range?
Y
es
No
Adjust the ink
pressure until it is
within the limits.
Replace the ink.
Has the cumulative
ink use time exceeded
the life limit?
No
Y
es
Adjust the excitation
voltage and pressure to
ensure proper ink particle
generation.
A
re ink particles
properly generated?
Y
es
No
Y
es
Is the normal height
obtained when the ink
pressure is raised above
the specified limit?
No
Can the ink pressure
be adjusted?
No
Y
es
Resume the
operation.
Is the charged
voltage output
correctly?
Y
es
No
Replace the ink.
A
re normal
p
rints obtained?
No
Y
es
The ink flow path may be
clogged: Clean the joint or
replace the filter.
Perform reverse cleaning of
nozzle, and then disassemble
the nozzle and clean it.
Provide pressure relief and
then replace the pressure-
reducing valve.
Can the ink pressure
be adjusted?
Y
es
No
Does the ink beam pass
through the center of
charge electrode?
Adjust the ink beam so
that it passes through the
center of charge electrode.
Y
es
Replace the EZJ94 board / EZJ106 board.