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Need help with SMD

Red eagle

Member
Nov 6, 2016
20
4
13
59
Hello all. I need a little help please.
Radio.... RCI -2995DX
Board.....EPT695015BR
Problem...
Radio will not key. It shows TX on the display and the "ON AIR" light comes on but no watts.
Surface mounted component directly behind plug marked 8v CW FM AM US LS PA WX was burned on top. The part is marked RA4 on top. From what I can find out it is a switching diode. Can anyone tell me where this can be bought or a substitute that will work. Thank you in advance.
 

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