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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Re: Yamaha RX-v661 7.1 Receiver

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

Re: Yamaha RX-v661 7.1 Receiver

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

Posted on Feb 12, 2008

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Re: Yamaha RX-v661 7.1 Receiver

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

Re: Yamaha RX-v661 7.1 Receiver

All speaker wires on right termanals good plug

Posted on Jan 22, 2008

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Re: Yamaha RX-v661 7.1 Receiver

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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Have tried a chat session with "classyexpert" re: Yamaha RX-V663 a/v reciever a number of hours ago. Session was terminated due power failure other end. Was invited to wait for further assistance but...

Hi and welcome to FixYa,

Have seen a lot of similar issues here at the site and on the field.

I have posted in your original problem, excerpt below:
Initially, a workaround:
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Even if it were a compatibility issue or HDMI processor issue on the receiver, the above should get you going.

Then the non functional HDMI could be attended to at your convenience. Technically, it would appear to the the HDMI signal processor of the receiver.

Good luck and Thank you for using FixYa. Happy Holidays.

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