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Hi I have an Maraantz PM -50 trying to use it as a pre amp for my son;s DJ all of a sudden the right channel has stop other than a hum, left is fine is it worth getting fix ??

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Hi,

If it is the pre out that the hum is coming from, it will probably just have dry solder joints to the RCA connection to that channel. Easy fix, but you will have to pull the entire bottom chassis of the amp to get to them. That particular model does not have a removable bottom. No biggy, just take all the screws out of the back, bottom and around the front escutcheon as well. Leave the transformer attached to the bottom though and just lift the PCB clear to get to the sockets across the back. If you have any questions about it, just ask away :)

You may even be able to get in there enough to resolder the rear connectors by removing the entire back panel even. I remember fixing heaps of these amps. They blew outputs regularly.

regards
robotek

Posted on Nov 04, 2008

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