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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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  • Lakshman Murthy Aug 05, 2008

    I DO NOT HEAR ANY MUSIC FROM EITHER SPEAKER. BUT AMPLIFIER STAGE OK WHEN TESTED FOR HUMMING NOISE. AMPS ARE INTACT. BUT NO EQUALIZER BAR NOT INDICATING. PLEASE SUGGEST REMEDIAL TIP
    LAKSHMAN HYDERABAD INDIA


  • Lakshman Murthy Aug 05, 2008

    NO BAR INDICATION OF EQUALIZER ON EITHER CHANNEL
    AMPLIFIER STAGE FOUND TO OK. HI POWER NOISE/HUMMING CAN BE HEARD FROM BOTH CHANNELS.
    HOW EVER NO MUSIC IS HEARD FROM EITHER CHANNEL
    ANY SOLUTION PLEASE!



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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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Posted on Jan 02, 2017

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