Pioneer Stereo Receiver (Belle Vue SY3)

This has been my much treasured Pioneer Stereo Receiver (model on one of the photos)which has been hiding in the garage for a few years linked to speakers and different separates. I dismantled the system a year or so back and this was all working then. But I have n't tested it apart from power so comes with no guarantees but no reason why it should n't work. Hoping for a good home as would hate to see it in landfill.