4-34
(2) Fault locating method for the control system/circulation system
(a) When the pump motor and all the solenoid valves are not operated, the multi-
power supply (24 V system) is abnormal.
(b) If the electric parts (pump motor, solenoid valves, and pressure sensor) are not operated in any
case other than the above, make the following checks first. When the criterion is satisfied, the
power supply, EZJ126 board, wire, or connector is abnormal.
Part
Check method
Criterion
Pump motor
(1)Operate the pump
on the
“Solenoid
Valve/Pump Test
”
screen.
(2) Measure the
voltage at pin
No.5 (wire: red)
20 V DC or more
Solenoid valve
(1) Replace the
solenoid valve and
the connector with
another normal
solenoid valve and
connector.
(2) Make a check on
the
“Solenoid
Valve/Pump Test
”
screen. Release
the solenoid valve.
An operation sound can be
confirmed.
Pressure sensor Measure the voltage
at pin No.1
(wire: yellow)
DC12V 10%
Measure the voltage
at pin No.3 (wire:
blue) in the ink jet
status.
Pressure
[MPa]
Output
voltage [V]
0.1
1.5 to 1.6
0.2
2.1 to 2.2
0.3
2.7 to 2.8
Summary of Contents for IJ RX2
Page 1: ...Service Manual HITACHI Printer Model RX2 Revision Feb 2014 Version A ...
Page 13: ...1 8 2 External views Rear side 1 2 2 Main body internal ...
Page 14: ...1 9 1 2 3 Print head ...
Page 101: ...3 26 Circuit diagram of EZJ127A ...
Page 102: ...3 27 Circuit diagram of EZJ127B ...
Page 116: ...3 41 Circuit diagram of EZJ129 ...
Page 164: ...4 40 5 Reset the time of the R air filter to 0 on the Parts usage time management screen ...
Page 247: ...7 Attached Drawing 7 1 Circulation System Diagram Circulation System Diagram 7 1 ...
Page 249: ...7 3 7 2 2 Electrical Connection Diagram RX2 B Basic model 7 3 ...