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The voltage on pin 3 is incorrect, that's the VRef pin. That should read +8V. Replace C133 and C134 and see if that restores operation. Let us know how you get on.

Also, does unsoldering the wire going to pin 5 on the mic jack get it to drop out of TX?

~Cheers~

[QUOTE="ExitThirteen, post: 667082, member: 6878"] The voltage on pin 3 is incorrect, that's the VRef pin. That should read +8V. Replace C133 and C134 and see if that restores operation. Let us know how you get on. Also, does unsoldering the wire going to pin 5 on the mic jack get it to drop out of TX? ~Cheers~ [/QUOTE]

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