Hitachi IJ PH Service Manual page 200

6.6.11 Nozzle clog, Ink beam bending trouble
Nozzle clog , Ink beam
bending trouble happened.
Can ink eject ?
1)It executes to clean an out side of orifice by cleaning paper with Make up ink.
2)If it cannot repair, then it practices nozzle backwash.
Ink beam
position is OK
It practices Nozzle forward
wash. (*1) And it confirms ink
beam position to the Gutter.
It detaches orifice plate.
It practices Ultrasonic cleaning by water
<Cleaning method>
1)It cleans orifice plate by water to be added detergent with the surface-
active agent for dish. Also Percentage of the detergent is approximate
0.5% to water.
2)Cleaning time is approximate 10 minutes.(* 2)
3)Then it rinses the orifice plate by drinking water.(About 1minute)
4)Then it rinses the orifice plate by the Make up ink.(About 1 minute)
5)If possible, it checks whether the foreign substance still remains or
not by Micro scope.
Ink beam position
It re-assembles the
is OK
orifice plate.
Then it confirms ink beam
position to the Gutter by nozzle
forward wash mode.
It detaches orifice plate again
It practices Ultrasonic cleaning again.
<Cleaning method>
1)It cleans orifice plate by the Nozzle
cleaning liquid for approximate10
minute.
2)If possible, it checks whether the
foreign substance still remains or
not.
Ink beam position
It re-assembles the
is OK
orifice plate.
Then it confirms ink
beam position to the
Gutter by nozzle forward
wash mode.
Continuing run
Inform to Hitachi
NO
YES
It can not repair
The Ultrasonic cleaning method for Nozzle
Ink beam position
Stainless steel or Glass beaker
is not good.
Orifice plate
<Notice>
1)Do use enough clean beaker & clean water, make-up ink
& NC01. Or nozzle clog sometimes will occur.
2)The beaker which put orifice plate should be chosen thin
wall one. Also flexible cup made from flexible plastic etc.
is not good. If it is used heavy walled vessel or flexible
cup, the cleaning power drop down because of periodic
damping of the ultrasonic power.
3)Put the orifice plate as shown in the figure below.
Ink beam position is
not good.
6-63
It practices Ultrasonic cleaning.
<Cleaning method>
1)It detaches orifice plate
2)It cleans orifice plate by the make up ink
for approximate15 minute.
3)If possible, it checks whether the foreign
substance still remains or not by Micro
scope.
*1 : How to do nozzle forward wash
<PH type>
[Ink stream adjustment] of Circulation
control menu screen.
* 2 The effect of each solution which is used for
Ultrasonic cleaning.
- Make-up ink
It can speed to dissolve constituent of the ink.
- Water with detergent
(Including the surface-active agent)
It can peel & remove a substance which can not
dissolve. If it is used a hot water, the cleaning
power will come strong.
- Nozzle cleaning liquid
It can dissolve insoluble substance that peeling
is difficult.
Water with
detergent
Ultrasonic cleaner put water or hot water
This is the orifice plate.
Incline as shown in this figure and
put outside of orifice to be upper.
Beaker