FAULT FINDING AND REPAIR
4-16 20509 Issue 7 Jan 2018
INK SYSTEM
WARNING: The ink system MUST BE DEPRESSURISED
before any work is done on it. After the work is
completed the ink system must be pressurised
again. Procedures for both of these are included
below.
Whenever an ink pipe is disconnected, clean the pipe and its fittings and
check that they are undamaged. To achieve an ink-tight joint, apply some
Loctite542 to the fitting before it is reassembled.
Depressurising the Ink System
This procedure must be used before commencing work on the ink circuit.
(1) Set the Pump Inhibit switch to position 0.
(2) Switch off the printer at the power switch.
(3) Close the valve on the print head by turning the knob fully clockwise.
(4) Place a container under the print head and carefully release the
screws fixing the nozzle plate just sufficiently for ink to escape.
Alternatively, remove the print head cover, disconnect the pipe at the print
head manifold, and put the end of the pipe into a container.
(5) Slowly open the print head valve and allow ink to escape into the
container.
(6) Continue to allow ink to escape until the pressure has fallen to zero.
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