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Guitar amplifier sound

When I turn on my marshall amp it makes a strange sound which resembles a small motor. it has only started making this sound recently, before now the amp was silent. the sound on the amp is good but it just makes this weird noise. can you help me?

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  • thecross Jun 16, 2008

    When I turn on my marshall amp it makes a strange sound which resembles a small motor. it has only started making this sound recently, before now the amp was silent. the sound on the amp is good but it just makes this weird noise. can you help me?



    The model of my amp is Marshall Valve State 2000 AVT. And it is a 50 watt amplifier.



    Please help me if you can. Thank you very much.

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HI thecross

What model Marshall have you got?

regards
robotek

Posted on Jun 06, 2008

  • Graeme Ross
    Graeme Ross Jun 17, 2008

    Hi thecross

    Marshall Valvestates have problems with dry solder joints making them do many things from howl, to distort, to not work at all. Your amp has probably fallen to this problem also. If you can solder, i suggest removing and resoldering the main pcb. This will sort out 90% of its problems.

    regards
    robotek


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Hi thecross

I have fixed so many of these amps over the years... Marshall Valvestate series of amps are notorious for dry solder joints developing on the main PCB. If you have the skills(or an old mate that does)Remove the PCB from the chassis and resolder any suspect dry joints and you will fix the problem. Check particularly about any components there the PB has changed colour. This is an indication of heat in that area, and heating and cooling is a major cause dry joints.
I am more than happy to answer any other questions you may have about it, just give me a hoy :) If you are still unsure, or have problems, then before you give a rating for this advice, please get back to me and we can try some more things.
Thanks for using FixYa, If you consider the advice I have given you as sound, a FixYa rating is a great reward for my efforts to help you. Cheers.

regards
robotek

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