Corrective Action - HEIDENHAIN iTNC 530 Service Manual

22.7 Corrective Action

Pushbuttons If a key no longer makes contact:
Defective pushbuttons are not replaced individually!
Reason: If individual pushbuttons make bad contact or fail, other keys will also reach the end of
their service life soon.
Therefore, only complete boards including the pushbuttons are replaced.
If a key permanently makes contact:
If required, remove chips and clean the keyboard!
Replace the defective potentiometer.
Potentiometer
If you have found that the TE interface of the control is defective (connector X45), replace the
Control
MC. --> See "Exchange of HEIDENHAIN Components" on page 28 – 523.
July 2010
Shut down the control and switch off the machine.
Caution
Observe the ESD precautions. --> See "Important Information" on page 28 – 523!
Remove the keyboard from the console (take care that all connected cables are labeled before
you disconnect any).
Disassemble the keyboard.
Clean the components with a standard cleaning agent and a piece of cloth.
Dry (or let dry) the components.
DANGER
When liquid cleaning agents have been used, the electrical devices must dry completely
before they may be operated again.
Reassemble the keyboard.
Note
Put the rubber mats back into the frame as they were before.
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