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Kenwood receiver KRV-5570D sound and display switches / turns off

Hi,
I have an Kenwood KRV 5570D receiver, and since several months problems are increasing.

Sometimes during operation i hear some scratch noise and the speakers are disabled and out of function.
Sometimes it switches from normal operation to loud noise (like a unprecise set radio channel).
Often I hear repeating clicking noise, display is changing (speakers on / off), sometimes it displays 96khz and the speakers are off.

The problems are independent from the input channel.

I have changed the thermal conduction paste between the heat sink and the electronic devices, I also have reset the microcontroller.... no effect.

Is there any chance to repair the receiver, or is everything lost?

Thank you!
Frank

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4 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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  • 4234 Answers

SOURCE: Kenwood:1090VR Cracking sound from front speakers

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

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rockmeister
  • 2047 Answers

SOURCE: kenwood vr6050 receiver sudden loud static or

Kenwood sound units are probably market leaders in most parts of the world because of the durability and high standard of their products. When loud screeching sounds and static is are heard on sound systems in most cases it is as a result of poor wire connections to the speakers. Check the wires to the speakers most likely the screeching and static is coming from those.
Also static could also be caused by mobile devices being close to the receiver. Mobile devices such as internet modems and mobile phones as well as radio transmitting devices could cause static and screeching.
Hope this solution has been helpful?

Posted on Jan 08, 2011

  • 1 Answer

SOURCE: I own a kenwood KR-A4060 receiver/amp and i can

I have exactly same problem. After inspection it looks like 2 capacitors are burned, C13 and C14. As soon as I find schematics I ll post the values.

Posted on Feb 18, 2011

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