Hi guys, I have always wondered what the purpose of the mysterious strip found on the keybeds of digital pianos are. There seems to be a carbon line in the middle and soldered at both ends and in the middle. Doesn't seem to be connected to anything important :S and nothing is placed on top it when the keybed is assembled.
Thanks in advance.
Thanks in advance.
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Are the switch patterns carbon coated? If so could it be a factory test point, say an automated probe resistance test, to check the carbon coating for the switches has been deposited and in the correct thickness?