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Yamaha avx 700 switching itself off

My yamaha avx 700 amp will just switch itself off quite randomly and without warning. Sometimes will work fine for hours and then just suddenly switch off. Other times it switches off immediately i switch it on. This is obviously a very annoying problem and one i would love to find a solution to to as it is driving me mad! Any advice on this would be greatly appreciated. Thanks.

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SOURCE: Yamaha Receiver R-700 Input & Recout switches cut out!

I have 2 of the same receivers. One works perfect and the other had the same problem as you describe. The faulty one I brought to work to use. Since I wasn't planning on recording anything I desoldered both swithces and swapped them. The REC OUT switch is a 6 pos SW, and the INPUT is only a 5 pos SW, but it works. Now my sound doesn't cut out any more and I have a receiver for work.


Posted on Dec 26, 2007

  • 144 Answers

SOURCE: yamaha avx-700, no sound, LED

Try hard reset, check the manual how to set things back to factory settings. Ensure all cables are connected properly, all + on + and all - on - (don't forget to check the speakerterminals!). Some equipment do into auto-protect mode when a + and - are incorrectly connected.

Posted on Jul 08, 2008

  • 30 Answers

SOURCE: Pioneer VSX-D412 AMP-ERR message.

The AMP-ERR message in many Pioneer Receivers is caused by some DC in the output. The microprocessor then issues the warning and shuts the unit off. It is definitely not a relay switch. It could be the amplifier power pack, i.e. PAC011A or similar that is faulty or something else. Not easy to repair for the non- experienced DIY.

Good luck

Posted on Apr 24, 2009

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First i would strongly suggest that you review your wiring, since the problem occurred after those change , It might also be just coincidence. When you are playing something(music) go around and listen carefully to each of the speakers, check for muffled or distorted sound, that could indicate a speaker or wiring problem. Of course the problem could also be in the receiver. The protection circuit in your amplifier could be acting up(too sensitive), in that case you might need the help from a local repair tech.
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