Solenoid Valves Replacement Procedure - Hitachi IJ RX2 Service Manual

4.5 Solenoid Valves Replacement Procedure

"Caution " : MV8 (Cleaning valve) is deferent from other valves.
Check the color of seal below.
MV8 (Cleaning valve)
1 Perform the following pre-replacement operation for each solenoid valve
that you are to replace.
Solenoid When
valve No. operated
Execute "Ink drainage".
MV1
MV2 (1) Remove the tube connection
(2)Turn on the pump, MV2, and
Execute "Gutter Cleaning".
MV3
Execute "Ink drainage".
MV4
Execute "Nozzle backwash".
MV5
Execute "Ink drainage".
MV6
Execute "Ink drainage".
MV7
Execute "Pressure relief".
MV8
2 Turn off the power supply.
3 Perform "4.1.3 Approach to the parts on the rear side of the equipment".
4 Remove the connector of the solenoid valve to be replaced.
Solenoid valve No. .
MV1
MV2
MV3
MV4
Orange (Serial No.)
the solenoid valve
block of the ink reservoir.
MV6 in this order for about
one minute, and then turn
them off.
(Solenoid/Pump Test screen)
Wire color Solenoid valve No.
Brown
Red
Orange
Yellow
Other valves
White (Serial No.)
is When the solenoid valve is not
operated
Drain the ink in the main ink tank
from the drain tube.
No operation is required.
(Take care about an ink drip.)
No operation is required.
(Take care about an ink drip.)
No operation is required.
(Take care about an ink drip.)
No operation is required.
(Take care about an ink drip.)
No operation is required.
(Take care about an ink drip.)
Drain the ink in the main ink tank
from the drain tube.
No operation is required.
(Take care about an makeup
drip.)
Wire color
MV5
Green
MV6 Blue
MV7
Purple
MV8
Gray
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