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Yamaha xs 350 no sound and protection lights are on

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  • cebuwm Jan 25, 2009

    The protection lights are on as soon as the amp comes on ?


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Check your speakers cables and confirm good condition(no short circuit-no wire touches amp chassis)-no short in speaker itself connect it one by one and test after connection.

Posted on Jan 24, 2009

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No sound coming out on any channel

I would also guess you have a flashing indicator, correct? If you do, your amplifier has DC Offset(a damaged amplifier). If this is the case, the protection circuit will not allow audio on any channel.
If you are interested in having your Yamaha repaired, please look at my website, You may contact me there. Thank you.

Jul 13, 2015 | Yamaha DSP-A1000 5-Channel Amplifier

1 Answer

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 Audio Players & Recorders

1 Answer

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

Oct 12, 2010 | Yamaha P-7000 2-Channel Amplifier

2 Answers

How do you switch from 8 ohms to 4 ohms on a 3500 yamaha amp

Switch what? It accepts 4 ohm speakers for stereo mode just fine.

Jan 25, 2010 | Yamaha P-3500 Amplifier

2 Answers

Can this all be hooked up?

There was never anything mentioned about the 18 yamaha sub in the hook up process

Aug 17, 2009 | Crown CE1000 2-Channel Amplifier

1 Answer

I have a yamaha amplifier in here for repairs, the model no is A500, i cannot get the speaker protect relay to come on, i have replaced all the transistors & capacitors in the speaker protet circuit to no...

Measure DC to ground on the output transistors to check for any offset. The protect circuit is the least likely to be the problem. Post the readings here and I'll guide you from there.


Mar 11, 2009 | Yamaha XS-350 2-Channel Amplifier

1 Answer

Yamaha p4500 protect lights do not go off at power up

You only normally get that when the Volume over peaks, and the amp will automatically cut out to prevent it fron blowing the whole P.A up.
If you know it was working fine before the wires were twisted together, then best try undoing what was done, and making sure that the Amp's Volume is turned down to minimum.

Dec 02, 2008 | Yamaha P4500 Power Amplifier 2-Channel

2 Answers

Protection of yamaha pc 2002

Protect delay is in the relay and not adjustable as to delay time.
I would not worry unless no sound then may have to replace relay.


Feb 20, 2008 | Yamaha P2500S Amplifier

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