FAULT FINDING AND REPAIR
20509 Issue 7 Jan 2018 4-21
(3) Remove the rubber diaphragm.
(4) Flush out the NRV recess with wash.
(5) Clean the diaphragm and O-Rings. Replace if worn or damaged.
(6) Refit the diaphragm.
(7) Fit the inner O-Ring onto the end cap.
(8) Fit the outer O-Ring into the groove in the manifold block.
(9) Refit the end cap.
(10) Repressurise the ink system.
Pressure Switch Replacement
Note: The pressure switch contains delicate components and must be
handled with care. It is also factory set and should not be
adjusted.
The printer must be switched off and the cabinet cover removed. Place
tissue in the cabinet base to catch escaping ink. Place the print head over
a container to catch escaping ink.
To check the ink pressure, it will be necessary to use a pressure gauge.
(1) Depressurize the ink system.
(2) Remove the protective boot and the heat shrink sleeve from the wires
and pressure switch body.
(3) Remove the wires from the pressure switch (make a note of the
connections).
TP3393-2
Pressure
Switch
Air Valve
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