Kai,
?
because the level is very low (-85dB) I see two possible reason:
- a broken RX signal path (from IC204 CLK2 - the test signal source - via R518 to the LPF section and up to IC407) or
- a broken IC704.
?
Do you have good output from the TX? How are looking the LPF sweeps? If this is ok, you may exclude the LPF section as a culprit.
?
73 Ludwig
