Riso ComColor X1 series Technical Manual page 300

Ink Flow Section
Negative Pressure Ink Tank Air Valve
Draining the ink from the Ink circulation unit is not required when replacing the Negative pressure ink tank
air valve.
< This is because the Negative pressure ink tank air valve is already OPENED when the machine power is OFF.>
1) Remove the Left and Right Top covers, Rear cover, and Right-side cover.
2) Open the Power supply unit, Engine control PCB, and Ink supply unit.
3) Disconnect the Air tube, between the Negative pressure ink tank air valve and the Negative pressure ink tank
common air chamber, from the Common air chamber port.
4) Remove the connector.
5) Remove the mounting screws of the Negative pressure ink tank air valve and remove the Valve. (IT screw 3x4
(2 pcs))
Remove in Step-(3)
Air valve for the Negative
pressure ink tank
Caution in Assembly
1) The Wire harness for the Connector of the Negative pressure ink tank air valve should go from under the Wire
saddle to the connector port.
2) The connector of the Negative pressure ink tank air valve should be connected to the socket labelled "F".
The metal clip should face up.
[ 11A-88 ]
Remove in Step-(4)
Remove in Step-(5)
Connector goes into F socket.
Wire saddle
ComColor Series (Revision 2.4)