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Amplifiers i,ve got a yamaha dsp-a492 amplifier that when turned up high for a few minutes, it turns itself off. you can turn it straight back on, but when turn volume back up again, it turns back off. ok when on low volume.

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The unit is shutting itself off because it has detected a problem in the output stage. In many cases the problem is in the front end. That front end stage is allowing some DC current to pass on to the output stage. DC on the outputs is bad. This unit requires service. Expect a parts cost in the range of $10-$20. Add in the local labor rate for the total repair cost.
Dan

Posted on May 05, 2008

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1 Answer

I have a Yamaha dsp ax1 when I turn the volume up the amplifier cuts out


Generally speaking, an amp attempts to protect itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on.

Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.

You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.

If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.

If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'nekkid'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.

Check for loose speaker connections at the speaker as another possible root cause for intermittent shutdown.

Aug 16, 2011 | Yamaha DSP-AX1 10-Channel Amplifier

1 Answer

Yamaha DSP-AX1 ,. When turning on it only stays on about 4-5 sec. then shut off. Bob


Is this new equipment or a new problem on working equipment?


Register and download the manual for free at retrevo.com

http://www.retrevo.com/support/Yamaha-DSP-AX1-Amps-manual/id/319bh827/t/2/

See Troubleshooting Page 79

Impedance Selector in between settings

Generally speaking, an amp protects itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on.


Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.


You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.


If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.


If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.

Apr 07, 2011 | Yamaha DSP-AX1 10-Channel Amplifier

1 Answer

I have an amplifier DSP A 1000. When I turn it on it always working for a while, sometimes 1 hour sometimes just 15 minutes then turned off by it self. which circuit I should check?


Is it getting hot?

Generally speaking, an amp protects itself from heat, shorts and overloads by refusing to turn on or stay on.


Overloads can be from excessive periods of high output and shorts would be wiring issues or a speaker blowing up.


You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.


If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.


If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced hands-on tech.


Check for loose speaker connections as a root cause for intermittent shutdown.

Feb 14, 2011 | Yamaha DSP-A1000 5-Channel Amplifier

1 Answer

When turning on the power, DSP-A3090 turns itself off in a few seconds. What could be the problem? It sounds to me that some sort of a protection is acting. Is it difficult to fix or not? I will try to fix...


It might require you to register before you download it, but it is free.

http://downloads.nakedresource.com/hfe_download_centre/index.php?yamaha/yamaha_dsp-a3090_service.pdf

Generally speaking, an amp protects itself from heat, shorts and overloads.


Overloads can be from excessive periods of high output and shorts would be wiring issues or a speaker blowing up.


You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.


If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.


If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced hands-on tech.

Jan 22, 2011 | Yamaha DSP-A3090 7-Channel Amplifier

1 Answer

Yamaha Amp DSP A-3090 Power/function/Remote


These issues can only be fixed by an audio-tech.

Do a websearch around your area for a repair person

Sep 30, 2009 | Yamaha DSP-A3090 7-Channel Amplifier

1 Answer

Yamaha DSP-A3090: All video settings trip unit and it turns off


Hi...
Is the first set "stereo" settings and the 2nd set "surround" settings?
If so that may mean that the surround speakers arent all connected right.

Jan 14, 2009 | Yamaha DSP-A3090 7-Channel Amplifier

1 Answer

Dsp-a1000 dead


output stage problem, systems trips due to protection. have the power amp transistors checked. the rotating of function switch is normal, its like a routine system check

Jun 22, 2008 | Yamaha DSP-A1000 5-Channel Amplifier

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