Question about Yamaha RX-V661 Receiver

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Yamaha RX-v661 7.1 Receiver

My reciever plays for about 30 minutes then goes into safe mode for about 1 hour. Then it does it all over again. I cant even get into the movie before it goes down. Checked all wiring and it is clean no shorts. Help Please

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  • wannaskyline Jan 22, 2008

    Area is very breathable. This is a brand new receiver why would I need to buy a fan for it. Shouldn't it be built to work? It hasnt even worked hard yet.

  • wannaskyline Jan 22, 2008

    Yes its wired properly. Thanks

  • Anonymous Mar 16, 2008

    Yamaha rxv2300. my amp keeps turning off for no reason.There is no pattern of when it will turn off.Most times you can turn it on straight away and it will be fine,but sometimes it will turn off straight away.Put into repair shop and charged me to fix it,but still has problem,took back and they said couldnt find any problem.Rang customer service at yamaha australia and they said to check speaker wiring,checked out and no problem.It sits in a well aired position.Its driving me crazy and out of warranty.Whats next.

  • wannaskyline Mar 16, 2008

    Got the new reciever back and still doing the same thing. Changed impedence and still does it. Triple checked all the wiring. Could I have used to big of wire?



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3 possibilities mentioned your environment, inadiquate cooling. But that depends on how load you are using too.
2. An overloaded output, impedance check please. set it to lowest impedance. If it was working normal before, can you recall if sometime in the past you have posibly overdriven your speakers and your amp turned off? Check your speaker or crossover network for possible short.
3. Very rare case but a persistent trouble if already present in the unit of Yamaha AV system CPU. Grounding problem of your main amp board and controller board. More than twice i have replaced the CPU but still turns off. I have modified to shunt the main board directly to the ground, since then the system went stable. In another model or unit with cooling fan, i have modified to fan-on circuit to advance fan activation. Because in some cases, the air produced by fan not enough to cool the heat sink when it is already hot. What i did was to set the fan to go on earlier even before it becomes hot. No harm done withg the unit, it is stable.

From Yamaha service.
This is not certified solution by Yamaha but my own. Even Yamaha could not find a solution, replacing boards etc... still the same.

Posted on Mar 19, 2008

  • Redentor Rivera Mar 19, 2008

    the system has to be modified... I dont know in your place if Yamaha service will dare modify. it is brand new, but i was from Yamaha service too and i make my own modifications for them, sor customers. You brought it for service and when returned still doing the same, obviously they did not find any trouble, but it was working well with them otherwise they will not give back.

    Did you get the sets of speakers from them too? did they suggest to you the speakers to match your system/ 661 is a medium power amp only but main amp is highly biased for best quality, power but the result is overheating. maybe a little modification will do. But as you said brand new unit so Yamaha should be on top of it.




Could be overloading your circuit and the receiver goes into safe mode to protect itself

Posted on Feb 12, 2008

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On the audio processor board there is a bad battery capacitor (super cap). this board is the upright board where the audio jacks are located. the cap is C633 a .047F 5.5 volt. you must remove this cap and clean under it and arround it. this cap leaks it's electrolidic fluid that intermitantly shorts the foil arround it. replace the cap with a new one.

Posted on Feb 06, 2008

  • Robert Johnson Feb 06, 2008

    if the unit is new, set the impedence to 6 ohm page 93 of the manual will tell you how. dis-regaurd the "super cap" that is a problem of a different receiver. sorry about that!

  • Robert Johnson Mar 16, 2008

    two things about these sysems (since I have been a yamaha repair man for ever). 1: speaker impedence these systems are set for impedence of 16 ohm per speaker (who has 16 ohm speakers?) set the impedance to the 6 ohm setting. 2: check the speakers if the speakers have a short "SHUT DOWN" is the result. check for broken or torn surrounds on the speaker basket (woofer).old speakers are the most likley culpret. push the cone in and out gently if you feel any friction or scraping sound coming from the speaker then it is bad. tweeters don't have this kind of problem because they are some what issolated. phasetec speakers are 6 ohm so make sure the impedence is set correct. check all speakers for short. if you have a dought about the speakers unplug them one at a time untill you find the culpret.


All speaker wires on right termanals good plug

Posted on Jan 22, 2008

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Over heating then is it in a breathable area buy fans on ebay for it plug into the switch on ac outlet from off ebay

Posted on Jan 21, 2008

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Posted on Jan 02, 2017

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