Hitachi IJ UX Service Manual page 150

7 Disengage the connectors of the electrical parts (15 positions) (motor,
solenoid valves (8 positions), pressure sensor, viscometer (3 positions),
level sensor and float sensor).
8 positions
8 Remove the fixing screws at that fix the circulation unit (4 positions).
The circulation unit can be removed.
Fixing screws
9 Clean the portion stained with ink and then install the new Circulation unit in reverse order
of the procedures above.
10 Perform "Makeup refill" and then "Ink refill".
Make sure that any ink leak or makeup leak is not occuring at any places.
4-17
5 positions
1 position
1 position
Circulation unit
Fixing screws