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Old 03-20-10, 12:59 PM   #11
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Re: Yamaha Rx-v765 shuts down


Hello,
It definitely appears that there is an issue. I would run YPAO and see if it changes anything.
While you do not have anything stacked on top of it, how much clearance do you have above the AVR?
I would run YPAO and setup the AVR in an open air setup and see if the AVR still shuts down.


Usually, shutdown after 45 minutes or so indicates thermal issues. Given you are using efficient Speakers, I am somewhat surprised you have had so many shutdowns.
Cheers,
JJ


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Old 03-20-10, 01:25 PM   #12
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Re: Yamaha Rx-v765 shuts down


I'll try that. I have 6 inchs or so open above the receiver now - I'll increase that and see what happens. Thanks to all for your interest / help.


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Old 03-20-10, 01:46 PM   #13
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Re: Yamaha Rx-v765 shuts down


Hello,
I really think it might be a ventilation issue coupled with an AVR with insufficient Heatsinks to dissipate the heat buildup. Some AVR's cheap out on Heatsinks, Power Supply, and the amount of Capacitance to keep up with the Technology Arms Race going on between Manufacturers of AV Receivers.

With the costs for licensing Dolby True HD/Digital/PLII, DTS-HD/DTS-ES/DTS NEO, HDMI, THX, and more being high and with competition being cutthroat to keep costs down, Power Supply is an area where Manufacturers often skimp on to maintain profitability.

The weight of many current HDMI AVR's have really gone down while offering an amazing amount more of Processing Power for Room Correction, HDMI, and the Surround codecs.

This is why many of us here are fans of Onkyo. Somehow, they have managed to remain on the cutting edge of technology while still offering impressive Power Supplies in many of their mid to upper tier Models. At prices that are far less than competing Brands.

This is especially true of Onkyo's THX Ultra 2 Certified Models which also offer Audyssey MultEQ XT, and Reon Video Processing (truly one of the best) , and impressive Power Supplies. It truly can be seen in the weight of the Models. All of them weighing 50 pounds or more.
Cheers,
JJ


HT
Speakers: Martin Logan Vantage (Mains), Martin Logan Stage (Center), Martin Logan Vista (Surrounds), Martin Logan Montages (Surrounds) Martin Logan Descent i (Subwoofer) Martin Logan Depth (Subwoofer)
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AVR/SSP: Denon AVR-4520CI
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Old 03-20-10, 03:13 PM   #14
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Re: Yamaha Rx-v765 shuts down


Thanks for the input JJ. I agree - it acts like a heat problem. Another interesting anomoly - twice now I have attempted to access menus and the receiver would immediately return to the mode before the menu. Today, for example, I was attempting to menu to run the YPAO program. The receiver kept cycling out of the menu page - until I ran the fan over the reciever. It then held the menu page, allowing me to select and run the YPAO program. Previously I had attempted to run the auto-tune program with the same results - it wouldn't hold on the menu page. After the receiver had been shut off for some time, it would hold the menu page so I could select auto-tune. These all sound like thermal issues - cooling the receiver seems to correct the malfunctions.


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Old 03-20-10, 04:38 PM   #15
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Re: Yamaha Rx-v765 shuts down


If the unit shuts down with nothing connected with the space around it that you are describing, it has a defect that should be serviced. Contact a Yamaha service center. If it is new and you bought it from an authorized dealer it should be covered by warranty. Even if you did not buy it from an authorized dealer it may be covered.


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Old 11-29-10, 03:00 AM   #16
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Re: Yamaha Rx-v765 shuts down


I had the same problem so after reading some of the posts, I disconnected all the speakers etc and unplugged the unit for about 10 minutes or so. After I plugged the power cord back in, it still shut itself off after a few minutes so I gave up and unplugged the power cord again. About a week later, I was going to dispose of the unit but decided to give it one last try first. And guess what, after I hooked the speakers etc up again and plugged in the power cord, it worked fine!!! I have used it while watching many TV shows and playing games for about a week now and it still works perfectly. I don't know why having everything, (including the power) unplugged for a week would fix it but it seems to have done just that. Hope this helps...


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Old 11-30-10, 09:45 PM   #17
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Re: Yamaha Rx-v765 shuts down


Thanks for the reply. I was unable to stop the unit from shutting down. I returned it and received another unit. It has worked fine - no prolems at all. I think I had a defective unit.


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