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In Reply to: RE: Troubleshooting a Marantz 2230, assistance would be excellent... posted by LowRedMoon on June 02, 2009 at 13:08:26
Your problem sounds thermal from the timings described.
If you narrow it into the amp section, take a look at the heat sinks to make sure the bond to the outputs hasn't dried out. If so, the outputs may be overheating.
These are capacitive-coupled designs, but the main coupling Elnas are pretty durable. I wound up recapping the output boards on mine to correct a frequency imbalance, which made a world of difference. Total cost was about $7.
I'm guessing your problem to be thermally related, however. A can of component cooler may be your best friend here.
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