24 – 400 HEIDENHAIN Service Manual iTNC 530 HSCI
24.7 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.
8 Shut down the control and switch off the machine.
8 Remove the machine operating panel from the console. (Take care that all connected cables are
labeled before you disconnect any.)
8 Dismount the board, frames, rubber mats.
8 Clean the components with a standard cleaning agent and a piece of cloth.
8 Dry (or let dry) the components.
8 Reassemble the equipment.
Other MB
components
Replace defective components, such as the HSCI bus cable, the buttons NC START and NC STOP, the
CONTROL ON key, the EMERGENCY STOP button, lamps, etc. with original components!
Control
components
If you have found that the HSCI interface of the MB 620 or the MC 62xx or of another control
component is defective, replace the control component. --> See ”Exchange of HEIDENHAIN
components” on page 29 – 515.
Observe the ESD precautions. --> See ”Important information” on page 29 – 515.
When liquid cleaning agents were used, the electrical devices must dry completely before they
may be operated again.
Put the rubber mats back into the frame as they were before.
Check the function of the EMERGENCY STOP button on the (customized) machine
operating panel, if you have replaced the button (and in regular intervals afterwards).
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