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AMP My Yamaha amp turns on then immediately shut off, no wires of any kind are plugged into the amp.

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The unit has an internal problem and is shutting down. This is also known as protect mode. Since there is nothing connected at all, the most common cause of this is shoerted output transistors. Expect a parts cost in the $40 range plus the local labor rate for the repair cost.

Dan

Posted on Feb 27, 2009

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How to fix problems internally on a yamaha p3200 power amp when the protection stays on from cold power up


First check all speaker wiring to make certain there's no shorts.
Protection system come on if there's an overload. These are caused by shorts. If the speakers and wires are good then the only other cause is the main amp, possibly a transistor, has shorted.

Jun 22, 2012 | Yamaha Amplifiers & Preamps

1 Answer

Yamaha p4500 in protection mode


The manual says the heat sink is too hot or an unacceptable DC voltage was sensed going out.

http://www.retrevo.com/support/Yamaha-P4500-Amps-manual/id/962bh144/t/2/

Generally speaking, an amp attempts to protect itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on; or it may turn on but produce no audio to the speakers.

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.

Oct 07, 2011 | Yamaha P4500 Power Amplifier 2-Channel

1 Answer

I have a reciever HTR 5920, 4yrs old, and it shuts off as sson as I turn it on, the TV and the cable box remains functional just started, never had this problem before please help


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

Apr 16, 2011 | Yamaha Amplifiers & Preamps

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

14 speakers hooked up to home theater reciever,shuts off .5 vol


Hi,

Try less speakers.
The impedance will be to low for this amp.

Regards,
Gerard

May 10, 2010 | Yamaha P2500S Amplifier

1 Answer

AMP Power


The unit has an internal problem and is shutting down. This is also known as protect mode. Since there is nothing connected at all, the most common cause of this is shoerted output transistors. Expect a parts cost in the $40 range plus the local labor rate for the repair cost. Let me know if you want to attempt the repair.

Dan

Feb 26, 2009 | Yamaha Amplifiers & Preamps

1 Answer

My old yamaha wont stop buzzing


HI SIR .THAT IS NOT BIG PROBLEM.ALL YOU HAVE TO DO MAKE SURE THAT YOUR PRE HAVE THE FLL.1 PROPERLLY EARTHED(THE GROUND FROM YOUR AMP ALSO GOES TO THE PRE )2 ASK YOUR ELECTRONIC MECHENIC TO CHECK IF THER'S NO BROKEN GROUND ON THE BOARD INSIDE.

Aug 17, 2008 | Amplifiers & Preamps

3 Answers

Is it worth fixing at this cost?


your repairman told you 2chips? the output stage of this amp should have 2pairs of power transistors each channel. that means 4pieces. and besides, my experince in Yamaha(where i worked before) not only we replace the poweroutput transistors but also the drivers. it doesn't cost that much. nor the service fee depends in your area but the cost of power transistor shoud be around US 0.95 that was 5years ago.

Apr 02, 2008 | Yamaha DSP-A3090 7-Channel Amplifier

1 Answer

Yamaha amp turns itself off immediately


You could start with checking the internal fuses for failure.Remember to unlug at the wall before touching any internals, replacing a blown fuse with power up and holding onto a stell chasis can be very unpleasant!! Check back with me here to go from there :)

Feb 09, 2008 | Amplifiers & Preamps

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