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Kenwood Receiver KR-V127R - left channel not working

The left channel on my Kenwood receiver (KR-V127R, ca 1989) goes out after a few minutes after turning on. There is a "humming" noise, but no sound/music from the speaker. It is not a problem with the speaker. Neither the "A" nor "B" channel will work for the left side after it goes out. After it is turned off awhile (30 minutes to an hour) it will come back on, but only for a few minutes. Is there some circuit protection device that it tripping? Any suggestions to correct this problem are appreciated.

Thanks - sm

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Re: Kenwood Receiver KR-V127R - left channel not working

Select an input that is not connected, for example select CD with no cables going to the CD input on the backside. Will you then hear equal humming on both channels? If so, the amp stage is ok,
and the problem lies in the signal level circuitry.
Open the cover and use a plastic (insulated) stick to touch suspectible cables and components. When the sound returns, you've found the cause. Resolder or reseat the component/cable/card.
Use the insulated stick, NOT your fingers!

Posted on Jan 01, 2008

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