Question about Yamaha P4500 Power Amplifier 2-Channel

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When I turn it on the fuse blows up.

My yamaha P 2700 power amplifier when I turn it on the fuse blows up.

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  • jason May 11, 2010

    there is a short to ground , it will need repair

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  • Master
  • 1,175 Answers

Hi..
It will need service.
I would call the music store closest to you that sells PA gear and ask who fixes theirs.

Posted on Jan 12, 2009

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1 Answer

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All amps comes with fuses near to the power supply, the yamaha's fuses will be inside the amp. check the fuses if the fuses are not blown than the power supply must be tested by a technician.

Jul 09, 2013 | Yamaha P3500S Amplifier

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Yamaha P1500 power amp will blow the 230V fuse right when power comes on.


Hi Harald,

That amp could have a great value from your friend, being not thrown out

yet.


If you prefer to have a lasting relationship with your friend, you may need

to have it repair , if you can't.


If you prefer to repair, start by isolating components on the amplifier.


Conquer the power supply.

Isolate the transformer from the power supply , and see if the fuse

still breaks.

If still does , you might consider your first option

(cause you have a bad transformer)

But here in our country it is of No problem.these can be rewind as

the original winding.


If the fuse doesn't break then trace on the power supply rectifiers,

capacitors to the output transistors.


Take out the bad power transistors in pairs.

If these resolves the blowing of fuses.


then look for additional possible bad components around it.


You may have a channel busted , but at least you have one running.


It is for you to decide, to continue repair or buy the power transistors

and other extra components.


These would at least make your friend happy, if you can have it

running again.


Let us know what you find or needs further assistance.


Have a nice day!

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Yamaha dsp a1000 won't power up


Your power suply is defective and needs repair.
Or the power amp is shorted will blow inside fuse power line
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1 Answer

Yamaha no power


you need to check the power supply input of your amplifier using a multimeter set your tester into a dc voltage reading.then measure the power input you must have a DC voltage supply reading..open the cover check the fuse an open fuse will turn the unit to no power.there are causes of blown fuse a shorted power transistor at the circuit will blown the fuse you need to replace faulty transistors before putting up a new fuse...check also the diode at the power supply section ,faulty diode could lead to the same problem..

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Suspect an overload in the power section, or more likely the main amp. A semi-conductor device is now acting like it was a piece of wire. Easy to spot with an ohm meter, it will just like you have touch the test probes together! My guess it will be one or more of the things on the big heatsink that's gone.

Jan 24, 2011 | Yamaha P4500 Power Amplifier 2-Channel

1 Answer

The garget blows the fuse and goes off


if the fuse blowes when you swtich the power on its the power supply circuit. if the fuse blown after a short while that the Amp is on its possible that protection circuit is short
if you want to fix the Amp let me know

ecrdn@yahoo.com

Jack

Oct 15, 2010 | Yamaha P-5000 Amplifier

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My yamaha P7000 always lights its protection lamp whenever turn on...


The amp will require service. One or more power transistors have failed and the protect circuit keeps the power supply from blowing your speakers

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1 Answer

Yamaha AX-500 amplifier won't turn on!


Check fuses in back. If not fuses the power supply is dead. Buy a new one. They do weae OUT EVENTUALLy

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2 Answers

Yamaha P-4500


Hi radek

If it is a toroidal,they have a nasty habit of going shorted turns on the primary. Is it blowing fuses? Let me know

robotek
ex In'gill ;)

Sep 12, 2008 | Yamaha P4500 Power Amplifier 2-Channel

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