Matrix: How to allow Electret headset microphones to connect to 42xxE panels

To supply the needed voltage for Electret microphones to the headset connector of a 42xxE panel, open the lid and move LK3 on the left hand side of the main board (PDE4535BZ) on to the two pins towards the edge of the main board.See attached 
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File PDE4535b link 3 settings.JPG PDE4535b link 3 settings.JPG

Apr 06, 2019 by Administrator

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