Sony not working

Hi all! This is my first attemp to turn a radio, but something goes wrong.

I don’t know the electronics, but I use the soldering iron and the tester without problems.

The radio is in perfect working order.

I followed the (easy) instructions, checked many times welds, made some tests by changing polarity, disconnected the antenna from the circuit board, but touching the poles of the pot nothing change: the radio signal persists and I hear nothing from the guitar, only an increase in volume by touching the central pole.

Rebuilt several times connections, always all the same.

Any suggestions?






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