On the power supply/control board, measure TP5 for +20VDC. If TP5 is not +20VDC, then U1 LM338 Positive Voltage Regulator (part number 227-0339) on RF Amp Regulator board is most likely damaged.
I have a missing +20V indicator on my FX 50 Exciter, what could be the problem? Print
Modified on: Tue, 8 Oct, 2019 at 10:54 AM
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