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Marshall valvestate 8200 bi chorus problem!

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  • Marshall valvestate 8200 bi chorus problem!

    I don't know if anyone can steer me in the right direction? on what to test or look for? I just bought this amp it needs some cleaning and I was gonna use dexoit on the scratchy pots! It works! but I'm not getting anything out of the left speaker output? and I wanted to use this amp for my clean channel and run quadraverb thru stereo effects loop! and use a A/B box to switch from my Randall rm100 (dirty channel) I use to have a Bi chours 8200 years ago and they have great stereo clean tone! Thanks!

  • #2
    Not exactly an easy amp to repair.(

    My first guess is that the one amplifier section is blown.

    Just a guess.

    Here is a link to a repair blog.The Repair Bench: Marshall Valvestate 8200 Amplifier Head

    My best suggestion would be to take it to a tech.

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    • #3
      Deoxit is wonderful stuff.
      ~~
      I see in some literature that amp has a full complement of mono/stereo/send/return jacks on the back.

      Clean those jacks.

      Sometimes I spray a little deoxit on a guitar cord end or a q-tip and wipe it on the guitar cord end and push it it in and out of the jack.

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