![]() ![]() To pin 14, and wiper to pin 13 allows the display contrast input to Installing a linear potentiometer of 15k, high side to pin 12, low side Temp compensation, thus causing the contrast "drift" or instability. The display is temperature compensated and it varies the -25vdcĢ- When driving display pin 13 from the radio, it ignores the display's ![]() The -30vdc from the radio pin 2 should not be connected to theĭisplay. After working with the mfg, Iġ- The display generates it's own -25vdc and outputs it to pin displayġ2. It seemed to be a thermalĭrift of some sort in that circuit. Radio menu and readjust the contrast setting. It works, but over the period of an hour or so, one has to go into the Input (display pin 13) from the 756 contrast output (DV0, radio pin 1). If you damage something while trying this, don't blame me.these are only notes I've posted from several installations I've done, and feedback from others who have done the same. I'll probably add to / edit this blog as I continue to test & install more displays. This is an attempt to archive info & notes from myself and others about different displays used. The displays in these radios haven't been supported by Icom in several years. This blog is about replacing the LCD display in a Icom IC-756 classic. The display has a more brilliant color than this, my phone cam just doesn't do it justice! ![]()
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