Ink Drop Charge Too High - Hitachi IJ PH Service Manual

6.3.10 Ink Drop Charge Too High

Ink Drop Charge
Too High
Is the gutter
Yes
section soiled?
No
Is the ink
recovered without
No
filling the gutter
hole with it?
Yes
1
Clean the gutter section and
its surrounding area with a
cleaning solution. When using
carbon type ink like JP-K31A,
refer "Instruction manual
1.2.3 Print head cleaning (4).
Does the IJ printer
become ready for
printing when you
initiate ink ejection
and start it?
No
Is the ink properly
atomized?
Yes
Position the ink stream
at the gutter center.
Initiate "Ink circulation" from
the circulation control screen.
If the problem is
not fixed:
Replace the recovery filter (see
the recovery filter replacement
procedure).
If the problem is
not fixed:
Perform "Gutter cleaning" from
the circulation control screen.
Is the recovery
system clogged?
If the problem is
No
not fixed:
Execute the "Nozzle
Backwash" function from
the circulation control
screen.
If the problem is
not fixed:
Remove the orifice plate
from the nozzle. Reinstall
it after subjecting it to
ultrasonic cleaning.
Adjust the beam position.
6-29
Yes
Resume the
operation.
No
Change the excitation
voltage setting to
assure proper
atomization.
Yes
Replace the circulation
unit.