HEIDENHAIN iTNC 530 Service Manual page 363

The functioning of the keypad interface on the MC can also be tested with the test adapter:
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May 2006
Disconnect the keypad from the MC.
Connect the test adapter instead to connector X45 of the MC.
You can now simulate the pressing of keys by bridging the corresponding pin sockets on the
test adapter.
(Please refer again to the key matrix which sockets must be connected.)
Caution
Do not generate a short circuit of the potentiometer voltage (PIN 36 and 37)!
Note
As the keypad interface X45 on the MC is designed as female, you can also connect the pins
with a wire bridge and thus conduct a simulation by pressing the keys.
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