Hitachi IJ UX Service Manual page 146

5 Remove the fixing screws (2 positions) of the solenoid valve.
"Caution": Put wiping paper under the solenoid valve to provide for an ink drip.
6 Clean the portion stained with ink and then install the new solenoid valve in reverse order
of the procedures above.
[Caution] Securely set the O-ring in the groove of the solenoid valve.
Pay extra attention not to cause the O-ring to fall off or pinched.
7 Reset the time of the replaced solenoid to 0 on the "Parts usage time
management" screen.
MV3
MV4 MV7
Orange Yellow Purple
MV6 MV5
Blue
Green
Solenoid valve
O-ring(S24)
O-ring4.7
MV2
Red
MV8 MV1
Gray Brown
MV11
Gray
4-13
Fixing screws
(2 Positions)
<UX-E only>
MV12
Red