Ashhar,
I was thinking about checking the signal "AUDIO-MOD" coming out from the WM8731 and following its path through Q6. What do you think?
If I understand correctly, all the signals are generated by the WM8731 codec and sent both to the LHPOUT (pin 9), to be sent to the earphone jack and speaker, and to RHPOUT (pin 10) to be sent to the TX stage through Q6, that's been enabled by the "TX" signal, correct?
Tonight I'll check and I'll report here. In the meantime, just wondering, could there be any reason why the RHPOUT output has been muted by software (maybe some corruption of the files during shutdown or something similar)?
Thanks!
L.