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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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


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.

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Hi Harald,

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


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

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If still does , you might consider your first option

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

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Take out the bad power transistors in pairs.

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then look for additional possible bad components around it.

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

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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

ex In'gill ;)

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