Amp Too Cold?

[Lazarus Short]

The amp (Yamaha DSP-A2070 in power amp mode) in my main system has been off for a while, about a month. I powered everything up today, and the amp is making odd noises thru the speakers, and shutting down. I checked it with a digital thermometer, and it's sitting at 63.6 degrees. I can't find anything in the manual. Is it bad to try to operate this thing so cool?

 

[laatsch55]

Shouldn't have a thing to do with it, not at those temps....

 

[Lazarus Short]

Lee, I thought a few minutes ago to use my infrared thermometer, and took some readings off the faceplate, as well as off some other things near the floor. The temp is touching 44 degrees...I knew it was chilly in that room.

 

[laatsch55]

As long as your not 30 below , your good...

 

[Lazarus Short]

​That means I have a serious problem.

 

[laatsch55]

Yep, anytime a protection circuit is triggered that's a serious problem....

 

[Gepetto]

Yep, anytime a protection circuit is triggered that's a serious problem....

Or you have a solder joint or component problem that only shows up at cooler temperatures. Not that uncommon to have a flakey solder joint that only shows up when it gets cold.

 

[Fishoz]

Warm her up and plug her in again...

 

[Northwinds]

Laz, hope it's an easy fix. If you want to borrow an amp for awhile, you can use the Dynaco Stereo 400. Plenty of power in that 60lb box

 

[orange]

The amp (Yamaha DSP-A2070 in power amp mode) in my main system has been off for a while, about a month. I powered everything up today, and the amp is making odd noises thru the speakers, and shutting down. I checked it with a digital thermometer, and it's sitting at 63.6 degrees. I can't find anything in the manual. Is it bad to try to operate this thing so cool?

Check your speakers and the preamp as well.

 

[Lazarus Short]

Laz, hope it's an easy fix. If you want to borrow an amp for awhile, you can use the Dynaco Stereo 400. Plenty of power in that 60lb box

​That's a kind offer, but the 46# Yamaha is almost at my limit already...

 

[stuwee]

Hello Laz, I'm not an expert but, Yamaha, seem to have over zealous protection curcuitry

As a rule, I always leave my SS amps on all the time, the power draw is minimal and it keeps the electrons flowing...ie, the same with a classic car...let it sit and things happen, use it and it's happy , of course when a transistor lets go... Toast!! Nothing you can do but replace!

 

[JustMike]

Good Morning Laz.
How is the temp up there? 12 above down here today. Chilly.
Are you running the Yammy in surround mode or do you have the switch on the back in the off position for Direct Analog stereo?
Those bypass switches are sealed wafer type Alps and are a common problem in these units.
Did you get any display code when it shut down? If not the amp section is probably fine. If you have another preamp, you can
run it into the amp section of the Yammy to test the amp section.
Your welcome to come down if you need me to try and screw it up more for you.

• 
  
  

• These AV units are a pain in the ass when they start acting up.
  
  I have lots of gear if you need to borrow a piece or two.
  
  
  

 

[Lazarus Short]

Mike, I'm using it as a two-channel power amp, with whatever switch in the back switched for that purpose. Later today, I'll lug it into the shop and fiddle with it. It may just need to warm up a bit, and have the switch switched. Thanks for the amp offer, but I have the Arcam or the Aiwa monoblocks as backup. If the Yammie is really tits up, maybe that will impel me to recap the Cyrus 2 at last.

 

[Lazarus Short]

Well, I pulled the amp out of the rack, put it on the bench, and reconfigured it as an integrated. It WORKS, sounds great with the Energy speakers, and so I think it will function that way permanently. Life as an integrated means the preamp moves out of the system, and one of the Aiwas will be doing subwoofer duty again, as the NHT sub amp has problems. Thanks to all for suggestions and help!