Hello all,
I have acquired a Pioneer VSA-730 surround amplifier. I give it power and it lights up, and changes source etc, But I get no sound. It has a main heat sink with Output Transistors mounted to it and there's two smaller sinks with Chip amps attached. These two smaller sinks heat up after a while, but no heat detected from the main amp. I assume the chip amps to be surround channels. There's a main input fuse and two more on the PSU rectifier/smoother circuit board, I havent delved between the various other PCBs to see if there are any more fuses, I should think relays provide further protection.
I cleaned carpets at a house the Tenant there had left it behind and the Landlord let me take it, so I don't know its history.
Is there a best practise for testing, I'd normaly check for shorts or open circuits on the output transistors, but wandered if the heating of the chip amps put the whole thing into some 'PROTECT' mode?
Your help is gratefully received, thanks.
Mike
I have acquired a Pioneer VSA-730 surround amplifier. I give it power and it lights up, and changes source etc, But I get no sound. It has a main heat sink with Output Transistors mounted to it and there's two smaller sinks with Chip amps attached. These two smaller sinks heat up after a while, but no heat detected from the main amp. I assume the chip amps to be surround channels. There's a main input fuse and two more on the PSU rectifier/smoother circuit board, I havent delved between the various other PCBs to see if there are any more fuses, I should think relays provide further protection.
I cleaned carpets at a house the Tenant there had left it behind and the Landlord let me take it, so I don't know its history.
Is there a best practise for testing, I'd normaly check for shorts or open circuits on the output transistors, but wandered if the heating of the chip amps put the whole thing into some 'PROTECT' mode?
Your help is gratefully received, thanks.
Mike