Hitachi UX Twin Nozzle - Page 253

6-11
6.2.5a (N1)Ink Drop Charge Too Low
Pour a cleaning solution over
the orifice plate surface to
clean it, then allow it to
thoroughly dry.
If the problem is
not fixed:
If the problem is
not fixed:
(N1)Ink Drop Charge
Too Low
▪ Press the Reset key to
clear the fault.
▪ Eject the ink to restart the
IJ printer.
1
Are the charge electrode
and nozzle end connected
via ink?
Pour the makeup over the
charge electrode and nozzle
area to clean them and allow
them to thoroughly dry.
Is the cumulative ink
use time longer than
the useful ink life?
Replace the ink.
Yes
Yes
Yes
No
No
Is the ink drop shape good?
Change the excitation
voltage setting to assure
proper ink drop shape.
No
Yes
Is the nozzle1 clogged
or the ink stream bent?
1
No
Replace the EZJ133 board *2.
Remove the orifice plate from
the nozzle, subject it to
ultrasonic cleaning, reinstall
it, and adjust the stream1.
Execute the “Nozzle
Backwash1” function from the
circulation control screen.
If the problem is
not fixed:
Replace the print head *3.
Is the gutter section
soiled ?
Clean the gutter and its
surrounding area with a
cleaning solution.
Yes
No
If the problem is
not fixed:
Replace the EZJ125 board*1.
Open the rear cover of
printhead and then wipe the
ink stains and dry the
printhead. And then, replace
the parts at the leaking point,
such as O-rings between the
gutter base and the headbase,
packings of rear cover.
Does ink or makeup
leak from the rear cover
of printhead?
(*1): When you replace EZJ125 board,
refer to [Replacement procedures
of EZJ125 board] in “3.3.5 EZJ125
board (Nozzle1 drive board)” .
(*2): When you replace EZJ133 board,
refer to [Replacement procedures
of EZJ133 board] in “3.3.1 EZJ133
board (MPU board)”.
(*3): When you replace the printhead,
refer to “4.13 Print Head
Replacement Procedure”.
[Caution]
Be sure to check that there is no wrong
connection of harnesses by referring to
[Connector numbers and Identifying
method of harnesses] in “3.3.20
Electrical Connection Diagram”.