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 Post subject: Re: Pioneer SX-780 turn on problem
PostPosted: Aug Wed 26, 2015 9:13 pm 
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Joined: Feb Thu 08, 2007 12:36 am
Posts: 2139
Location: Hillsboro, Oregon
Dielectric grease != heat sink grease. The latter is specially formulated to fill microscopic pits and voids with material that's a good conductor of heat. It should be available anywhere you can get transistors etc that go on heat sinks.

Pioneer receivers are notorious for their pistol-hot power supply regulators. Some people relocate the big transistors to the amplifier's main heat sink. While you have the PS board out, you might as well replace the electrolytic caps, because they've been in the oven for too long. Replace with models selected for high temperature and long life, so you don't have to do it again.


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 Post subject: Re: Pioneer SX-780 turn on problem
PostPosted: Oct Thu 31, 2019 10:01 pm 
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Joined: Oct Thu 31, 2019 9:59 pm
Posts: 1
Just wanted to say that I found this thread after experiencing the exact same issue on my SX-780. I re-soldered the 3 regulators on the board and it now works perfect. Thanks!


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