I am helping a friend and we are trying to configure his RR boxes for K3 Twin configuration I suspect a hardware problem.
There is no audio out on the control side. Everything else works - it turns the radio on and off, band changes can be made, and it will key CW. But there is no audio out from the box, no CW sidetone, and no "read back" of the IP address when powering up. Is there a point of failure we could examine? This is difficult without a schematic of the device. I tried to find audio on pin 4 of the audio IC, TDA7267A, but no luck.
Any suggestions or recommendations?
Charles NK8O
