Nozzle Orifice Cleaning; Precautions For Use - Hitachi IJ RX2 Service Manual

5.9 Nozzle Orifice Cleaning

1) Detergent to use for an ultrasonic 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.
2）Procedures of the cleaning
Nozzle Clogging or Ink Stream Bent occurred.
Eject the makeup *1 and confirm
the ink stream position if it is at
the center of the gutter.
Problem IS
Problem IS fixed.
fixed.
Ejecting ink, confirm the stream
position is almost the same as
that of stream alignment.
Problem is NOT fixed.
Remove the orifice plate. (Confirm if any foreign
object is attached by a microscope if available.)
<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 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.
Problem IS
Set the orifice plate to the nozzle,
fixed.
eject Makeup *1 and confirm the
ink stream position if it is at the
center of the gutter.
Problem IS
fixed.
Repeat <Procedures of ultrasonic
cleaning> and confirm stream position.
(MAX 2 Times allowed.)
Continue operation.
*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.
5-13
Problem is
NOT fixed.
Problem is NOT fixed.
Problem is NOT fixed.
Change the orifice to
the spare part.