Hitachi IJ UX, Service Manual, Page: 208 / 308

5-14
5.9 Nozzle Orifice Cleaning
1) Detergent to use for an ultrasonic cleaning 2
）
Procedures of the cleaning
The ultrasonic cleaning with the
Weak-Alkali Detergent is effective for
the foreign objects of the nozzle orifice
which it is hard to remove with MEK or
makeup.
[About a Weak-Alkali Detergent]
①
Characteristic of the detergent
Use household Weak-Alkali Detergent
on the market. (Detergent to clean a
ventilating fan, for example.)
Generally, Detergent on the market is
from 0.2 to 2 volume-% Weak-Alkali
solution.
②
Labeling of articles on the market
(Example)
・
Liquid properties :
[Slightly-Alkaline,
Mildly-Alkaline or Alkalescent]
・
Ingredient :
[Surface Acting Agent]
・
Concentration :[0.2% - 1%]
・
pH :[In the range of pH8 – pH11]
③
Precautions for use
・
In case the liquid concentration is
0.2% - 1%, Use the detergent as it
is, UNDILUTED.
・
In case the liquid concentration is
1% or higher, dilute by approx.
0.2%-1% with water.
・
Follow the PRECAUTIONS FOR USE
and DISPOSAL of the article
purchased.
Nozzle Clogging or Ink Stream Bent occurred.
Problem IS
fixed.
Problem is
NOT fixed.
Remove the nozzle orifice plate. (Confirm if any
foreign object is attached by a microscope if
<Procedures of Ultrasonic Cleaning>
(1) Ultrasonic cleaning with MEK, or genuine Makeup to
remove ink component and other soluble substances
in solvent.
(2) Drying by air blow or leaving it for 3 to 5 minutes to
remove the solvent on the nozzle orifice surface.
(3) Ultrasonic cleaning with Weak-Alkali Detergent for
30 minutes to remove the foreign objects that cannot
be removed by MEK or Makeup. (See (1) above.)
(4) Ultrasonic cleaning with water (pure water) *2 for 3
minutes to rinse off Weak-Alkali surface active agent.
(5) Ultrasonic cleaning with ethanol for 3 minutes to
remove moisture by dissolving it in ethanol.
(6) Drying by air blow or leaving it for 3 to 5 minutes.
Set the orifice plate to the
nozzle, eject Makeup
*1 and
confirm the ink stream position if
it is at the center of the gutter.
Problem is NOT fixed.
Problem IS
fixed.
Problem IS
fixed.
Change the orifice to
the spare part.
Continue operation.
Problem is NOT fixed.
Ejecting ink, confirm the stream
position is almost the same as
that of stream alignment.
Problem is NOT fixed.
Problem IS fixed.
Repeat <Procedures of ultrasonic
cleaning> and confirm stream position.
(MAX 2 Times allowed.)
Eject the makeup *1 and confirm
the ink stream position if it is at
the center of the gutter.
*1 Procedure to eject the makeup.
Execute the Ink stream alignment in the 2nd page of
Circulation control menu.
*2
TH-TYPE A is all right in substitution for pure water.
MEK is impossible of a substitute.