FAULT FINDING AND REPAIR
4-26 20509 Issue 7 Jan 2018
Accumulator Check
The accumulator provides the working reservoir of ink. It has a reserve
capacity of approximately 70ml, provided by compressing air behind a
rubber diaphragm. It may be necessary to check if a leak in the diaphragm
or the accumulator air seal has caused a reduction in the ink reserve.
Alternatively, if the diaphragm has collapsed for a reason not associated
with damage or a fault, it may need to be re-inflated. Refurbishing the
accumulator requires removal of the complete ink system.
To check that the accumulator is working to its correct capacity:
(1) Switch on the printer and allow the pump to run up the system to the
normal working pressure.
(2) Set the Pump Inhibit switch to position 0. Turn off the print head
valve.
(3) Place a calibrated beaker under a print head and loosen the screws
securing the nozzle plate.
(4) Carefully open the valve on the print head. Catch the ink escaping
from the nozzle plate in the beaker. Failure to collect more than 60ml
of ink indicates that the diaphragm has collapsed.
(5) Bleed the print head.
Reinflating the Accumulator Diaphragm
The printer must be switched off and the cabinet cover removed.
(1) Release any air pressure in the accumulator by pressing the centre of
the air valve, then remove the whole core.
TP3460-1
Calibrated
Beaker
Print Head
Valve
60ml
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