hk 670

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    Working on HK 670 Receiver and Left Channel Heat Sink Gets Hot

    I’ve restored an HK930 and HK 730, both of which have been working great. I clean them, replace the Electrolytic caps, and repot the power transistors. The HK 670 sounds great, and I was getting ready to button it up, when I noticed that the left heat sink is hot to the touch, while the right...
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