4-25
4.11 Troubleshooting Procedure for the Circulation System
Perform “(1) Fault locating and repairing method” for each trouble symptom.
For the items marked * in “Probable Cause”, perform “(2) Locating method for the
control system/circulation system” to make sure that the control system is normal, and
then perform the repair work.
(1) Fault locating and repairing method
Trouble
symptom
Probable cause
Status check
Repairing method
* The motor
malfunctions.
The motor does not
rotate.
Replace the motor.
The drive cam
is damaged.
A crack or friction
powder is found on
the cam.
Replace the pump
unit.
The follow
operation of the
stroke is faulty.
The piston cannot
follow the cam
motion.
Replace the pump
unit.
Foreign
materials are
mixed in the
check valve.
The solenoid valve
is operated but
charging and
discard are not
completed within the
specified time.
If this trouble cannot
be repaired by
repeating the
operation and stop,
replace the pump
unit.
The supply
pump
malfunctions
.
The check
valve is dry or
sticks.
The solenoid valve
is operated but ink
does not flow.
Refer to “4.12
Repairing method
when the circulation
route dry or sticks”.
* MV1
malfunctions.
When “Open” is
executed on the
Solenoid
Valve/Pump Test
screen, no operation
sound is produced.
Replace or repair the
solenoid valve
(MV1). Refer to
“4.12 Repairing
method when the
circulation route dry
or sticks”.
The
solenoid
valve
malfunctions
.
* MV9
malfunctions.
When “Open” is
executed on the
Solenoid
Valve/Pump Test
screen, no operation
sound is produced.
Replace the solenoid
valve (MV9).
Clogging in the
pipe or joint.
The operation sound
of MV1 and MV9 is
produced, but ink
does not flow.
Refer to “4.12
Repairing method
when the circulation
route dry or sticks”.
Ink does
not jet.
The supply
route clogs.
Clogging in the
orifice plate.
When backwash
practice, makeup ink
does not flow to the
tube of circulation
route.
Clean
the
orifice
plate with ultrasonic
cleaning.
The makeup
ink pump
malfunctions
.
The same as “The supply pump malfunctions".
Makeup
ink does
not
circulate.
The
solenoid
valve
malfunctions
.
* MV8
malfunctions.
When “Open” is
executed on the
Solenoid
Valve/Pump Test
screen, no operation
sound is produced.
Replace the solenoid
valve (MV8).
Summary of Contents for IJ PH
Page 1: ...Service Manual HITACHI Printer Model PH Revision Aug 2011 Version First edition ...
Page 2: ... Revision of PH service manual Revision Chapter Revised Page ...
Page 13: ...1 2 2 Main body internal PH D 1 8 ...
Page 80: ...3 25 3 25 Circuit diagram of EZJ95 ...
Page 201: ...7 1 7 Attached Drawing 7 1 Circulation System Diagram ...
Page 202: ...7 2 7 2 Electrical Connection Diagram ...
Page 205: ...7 5 7 4 Dimensions around charge electrode and deflection electrode Nozzle diameter 65 um ...