Beocentre 2002
This music centre came to me with a very loud hum on the RH channel, irrespective of the volume settings.
A check showed that the output IC was u/s, it's an SI1125H and they are no longer available.
The music centre was a family heirloom and the owner wanted it repaired.
The output stage is a separate module bolted to the heatsink which is fixed to the rear of the cabinet.
I decided the best way forward would be to redesign the output stage using modern chips mounted on a new board.
The IC I chose was the LM3886F (plastic package)
The circuit boards were designed on Kicad and made in China.
The system is on test at the moment and giving a good account of itself.
And here it is:
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