I have bought a defective 777 and fixed some problems.
But now the current problem is when I exact tune a radiostation,
the volume decreases to a very low level like the muting function. But the tuningmeter works as usual.
So I need your support and the schematic of the FM receiver part.
It would be great if someone could send this technical plan to me.
Every advice is also welcome

Here you go
http://www.mediafire.com/?edct0enywdz
I hope you can locate and solve the problem

Thanks to Eddy, these scans are great.

But i didn`t solved my problem.

Now I want to implement a small synthese tuner from an AIWA-Walkman.
I try to integrate it removeable in the first tape compartment.