Got the lights working in the back panel on the TK-760 but in the process lost my audio on transmit. I key up the mic, receiving radio receives a signal, I scream into the microphone but nothing comes out on the receiving radio...
By swapping various parts around on other TK-760 radios I have here I have determined the problem to be in the head.
First question. What is this mystery mini board? With the micro components it isn't something someone would cook up on their work bench.
red wire comes of IC 407 (voltage regulator)
Black wire goes to ground
Yelow wire to D 404 DC switch part of active filter amplifier
blue wire to C 488
Trace is cut on board between D404 and C488
Wondering if ripping this thing out would restore my audio on transmit?
