Checking The Keys - HEIDENHAIN iTNC 530 Service Manual

23.3 Checking the Keys

Possible
causes of error
Visual inspection First check the keypad visually!
The key may thus get caught.
In such a case, the MB must be cleaned carefully.
May 2006
Strong contramination --> Key gets caught
Jammed chips --> Key gets caught
Defective contact --> Key does not report to the control any more
Defective keypad board
Defective cable MB control
Defective interface on the control
Note
Due to an interruption of the NC stop signal (lowactive) between MB and control, the
machine cannot be traversed any more. The same problem is caused if the NC-stop key gets
caught.
Is the key strongly contaminated (grease, dust, oil, etc.)?
Are there jammed chips?
DANGER
When liquid cleaning agents have be used, the electrical units must dry completely before
they are operated again.
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