Yamaha DSP-E390 Repair
Repairing the Yamaha DSP-E390 is a straightforward task for a qualified engineer. The design layout is very logical and they separated the boards properly resulting in the main amplifier board having a small footprint. I managed to fix this even though I did not have a service manual, because the markings are very clear. Please note, only fully qualified and experienced engineers should carry out repairs. Simply having some letters after your name and membership of some society will not be enough.
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Yamaha DSP-E390Electronic Engineering
Repair
Power Supply
Back Sockets