Hitachi IJ UX Service Manual

4-46
Symptom Probable cause
Check method
Repairing method
The ink
pressure
does not
increase.
The supply
pump
malfunctions.
Follow the same descriptions as those of “Ink does not eject".
The solenoid
valve
malfunctions.
* MV1
malfunctions.
When “Open” is
executed on “Solenoid
Valve/Pump Test”
screen, no operation
sound is produced.
Replace or repair the
solenoid valve (MV1).
Refer to “4.15 Repairing
method when the
circulation route dry or
sticks”.
* MV2
malfunctions.
When “Open” is
executed on “Solenoid
Valve/Pump Test”
screen, no operation
sound is produced.
Replace or repair the
solenoid valve (MV2).
Refer to “4.12 Repairing
method when the
circulation route dry or
sticks”.
* MV9
malfunctions.
When “Open” is
executed on “Solenoid
Valve/Pump Test”
screen, no operation
sound is produced.
Replace the solenoid
valve (MV9).
The pressure
resistance of MV6
is faulty.
When the pump and
then MV1 are turned on,
ink flows to the collation
tube. (Solenoid
Valve/Pump Test
screen)
Replace the solenoid
valve (MV6).
Others
* The pressure
sensor
malfunctions.
Ink ejects and printing
can be performed but
the pressure value is
abnormal.
Replace the pressure
sensor.
Ink Over Fill
often
occurs.
The solenoid
valve
malfunctions.
The pressure
resistance of MV7
is faulty.
The makeup in the pipe
N is sucked even during
operation (except at
supply). (Remove the
tube connection block of
the makeup reservoir
and check.)
Replace the solenoid
valve (MV7).
The pressure
resistance of MV8
is faulty.
The makeup ejects and
cannot be stopped “at
non-cleaning stop”.
Replace the solenoid
valve (MV8).
The pressure
resistance of MV2
is faulty.
The ink in the pipe M is
sucked even during
operation (except at
supply). (Remove the
tube connection block of
the ink reservoir and
check.)
Replace the solenoid
valve (MV2).

Hitachi IJ UX Specifications

General

Brand	Hitachi
Model	IJ UX
Category	Printer
Language	English