Question about Kenwood 1090VR Receiver

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Kenwood:1090VR Cracking sound from front speakers

I get crackling sound on my Kenwood 1090VR Receiver and it trips sometimes. This problem reduces after the receiver is used for sometime, But problem returns again every time I start it when the Receiver is cold.

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  • Sachin
    Sachin Feb 09, 2009

    Thanks Dan,

    I tried and have resoldered a lot of connections, I also resoldered the 3 legged transistor on the heat sink...but the problem persists...

  • Sachin
    Sachin Feb 10, 2009

    Thanks Dan, I think your help with the possible parts and the service manual would really be helpful. One of my friends who is a good troubleshooter was tellling me that even the board could be leaking (I could not understand that), even he had suggested to go thru the oscilloscope route. Look forward to get an idea of the possible parts required.

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  • Master
  • 4,234 Answers

There are poor solder connections somewhere on the board. Usually these are at the voltage regulators where there can be some heat. Look for 3-legged transistors attached to small metal heatsinks, If you can solder, resolder the pins on those parts. Also look for any connections that appear to be grasiny or have rings and resolder them too.

Keep us posted.
Dan

Posted on Feb 06, 2009

  • ABRsvcs Feb 09, 2009

    If the resoldering does not resolve the problem, there is a defective transistor most likely in the pre-amp section. The transistor is breaking down which is causing the noise. Unles you are familiar with electronic troubleshooting and have access to an oscilloscope, this will be difficult to trace. I'll try to locate the service manual on this to give you a couple of possible parts, but it may take a few days. Your other alternative wuold be to request a detailed estimate from a local shop. Post the results here if you go that root.



    Dan

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