Hitachi IJ UX - Page 283

6-65
No ink ejection
from nozzle
NOTICE
1.Do not repeat the nozzle backwash
procedure more than two times.
If it is repeated to an excess, the ink
becomes thin, thereby causing
disordered prints.
2.If the ink is thin and disordered prints
are encountered, replace the ink.
Execute the nozzle
backwash function.
Remove the orifice plate
from the nozzle, subject it
to ultrasonic cleaning, and
put it back on the nozzle.
No
Replace three-way
solenoid valve MV9.
Replace the MGV
filter.
Replace the circulation unit.
Yes
No
No
Is t
he EZJ126 board
CN
13 connector,
EZJ132 board CN3
connector
, or pump
motor
connector
disconnected?
Replace the
EZJ126 board.
Yes
No
Is the pump
motor running?
No
Yes
Does three
-way
solenoid valve
MV9 operate?
No
Yes
Yes
Replace the pressure-
reducing valve.
Replace the
circulation unit.
Connect any
disconnected connector.
Yes
Does the on-screen
pressure reading
represent th
e specified
value?
No
Yes
No
Yes
No
Yes
Replace the ink filter
Replace the MV1,2,4.
No
Yes
Repair the troubled
solenoid
Yes
No
Is the Ink flowing
from the Ink filter ”C”
Yes
Is the Ink flowing from
the Reducing valve ”C”
No
Yes
No
6.5.8 No ink ejection from nozzle
Is the problem
fixed?
No
Yes
No
Yes
Resume the
operation.
Is the problem
fixed?
Is the problem
fixed?
Is the problem
fixed?
Is the problem
fixed?
Is the problem
fixed?
Is the problem
fixed?
Is MV1,2,4
sticking?
Replace the connection
harness
Is the problem
fixed?
Yes
No
Yes
No
Is the connection
harness conducting?
Is the problem
fixed?