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Re: Coolng AVR
grunt #300700 04/07/10 10:38 AM
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I've ran the 707 all day without shut down but the excessive heat can't be good, I wouldn't think. I'll probably set up some type of fan to run and put it on a switched outlet on the power center.


Rick


"A fear of weapons is a sign of retarded sexual and emotional maturity." Sigmund Freud

Re: Coolng AVR
Wid #300713 04/07/10 02:38 PM
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I don't think it's so much a worry about shutting down. Keeping any unit cooled will (should) prolong it's life. Remember when the office "computer" was in a big glassed-in room with a raised egg crate floor and always super a/c'd?


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Re: Coolng AVR
BobKay #300715 04/07/10 02:57 PM
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I dug up and old case fan and wired it up to an ac to dc 12v adapter. I'll see how well it works, I might need one that can move a bit more air.


Rick


"A fear of weapons is a sign of retarded sexual and emotional maturity." Sigmund Freud

Re: Coolng AVR
Wid #300721 04/07/10 04:08 PM
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 Quote:
I dug up and old case fan and wired it up...


That's what I did, Rick (TX-SR805). I found an old power supply that had a smallish plug (rather than a wall-wart) and just plugged it into the switched outlet on the back of the receiver. I have two fans running off that supply - one blowing down into one side of the unit and the other blowing across the top (it is in a semi-enclosed rack). Noise is not an issue.

My understanding is that a good part of the heat problem comes from the video processor, not the amplifier. That's why I have the fan blowing down into the right-rear of the unit (yours may have different architecture).

Both Peter and I have "vintage" Onkyo receivers also. I know mine runs warm. I also know it's been running almost non-stop for about 15 years.


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Re: Coolng AVR
tomtuttle #300724 04/07/10 04:16 PM
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I had an Onkyo 502 before this, it didn't run quite a hot as this newer unit does. I figured as you say Tom, it's the processor so I have it pulling the hot air up. The fan is located at the right rear.


Rick


"A fear of weapons is a sign of retarded sexual and emotional maturity." Sigmund Freud

Re: Coolng AVR
Wid #301318 04/11/10 02:34 AM
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I ended up replacing the fan I had with a 120mm fan. It is connect to the power center on a switched outlet. The bigger fan does quite a good job cooling the Onk.


Rick


"A fear of weapons is a sign of retarded sexual and emotional maturity." Sigmund Freud

Re: Coolng AVR
Wid #301350 04/11/10 01:48 PM
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Did you take any comparative temp readings after installing the fan, Rick?


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Re: Coolng AVR
Adrian #301351 04/11/10 01:52 PM
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Yes I did. The ir therm read 106°F after 4 hours of running at near reference levels. Before the fan was installed it was reading 128°F after heavy use.


Rick


"A fear of weapons is a sign of retarded sexual and emotional maturity." Sigmund Freud

Re: Coolng AVR
Wid #301363 04/11/10 03:37 PM
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Excellent! that's a huge difference.


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Re: Coolng AVR
Adrian #301368 04/11/10 04:51 PM
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Very impressive difference. How's the fan noise? Do you know offhand what brand of fan it is?


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