Hitachi IJ PH, Service Manual

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6-63
6.6.11 Nozzle clog, Ink beam bending trouble
Nozzle clog , Ink beam
bending trouble happened.
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.
It practices Nozzle forward
wash. (*1) And it confirms ink
beam position to the Gutter.
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.
It re-assembles the
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 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.
Continuing run
*1 : How to do nozzle forward wash
<PH type>
[Ink stream adjustment] of Circulation
control menu screen.
The Ultrasonic cleaning method for Nozzle
Water with
detergent
Stainless steel or Glass beaker
Orifice plate
Ultrasonic cleaner put water or hot water
<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.
It can not repair
Ink beam
position is OK
Ink beam position
is OK
Ink beam position
is not good.
Ink beam position
is OK
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 is
not good.
Can ink eject ?
It detaches orifice plate.
It re-assembles the
orifice plate.
Then it confirms ink
beam position to the
Gutter by nozzle forward
wash mode.
* 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.
Inform to Hitachi
YES
NO
This is the orifice plate.
Incline as shown in this figure and
put outside of orifice to be upper.
Beaker