Ink Drop Charge Too Low - Hitachi IJ PH Service Manual

6.2.5 Ink Drop Charge Too Low

Ink Drop Charge
Too Low
1
Is the nozzle clogged
or the ink stream bent?
No
Does the charge
electrode communicate
with the nozzle end via
ink?
No
Is the gutter section
soiled ?
No
Is the cumulative ink
use time longer than
the useful ink life?
No
Is the ink properly
atomized?
Yes
Replace the EZJ93 board.
If the problem is
not fixed:
Replace the EZJ98 board.
If the problem is
not fixed:
Replace the print head.
APH Shield
Yes
Yes
Pour the makeup ink over the
charge electrode and nozzle
area to clean them and allow
them to thoroughly dry.
Yes
Clean the gutter and its
surrounding area with a
cleaning solution. *1
Yes
Replace the ink.
No
Change the excitation
voltage setting to assure
proper atomization.
Gutter
6-7
Pour a cleaning solution over
the orifice plate surface to
clean it, then allow it to
thoroughly dry.
If the problem is
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, subject it to
ultrasonic cleaning, reinstall
it, and adjust the beam.
・ Press the Reset key to clear
the fault.
・Eject the ink to restart the
IJ printer.
１
* 1
Remove any dirt on this surface:
If this surface is dirty, and the
gutter hole and APH shield are
connected via ink, the APH
signal output may be unstable.
Take special care when using
carbon ink.