If the button does not stay selected unless it is held, the problem is most likely associated with the C53 and C55 capacitors in the power supply section of the 919-0108-250 board. They may have changed value or become leaky causing excessive ripple on the output of the U15 and U16 negative supply regulators.
Why don't the buttons on the front panel of the FM 250C Exciter stay selected? Print
Modified on: Tue, 8 Oct, 2019 at 2:05 PM
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