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Thread: Carvin mts3200 problem

  1. #1
    Junior Member
    Join Date
    Dec 2016

    Carvin mts3200 problem

    Hi, i,m from Perú and i have some issue with my head carvin mts3200; i was using it normaly( no problems or issues) so then yesterday we had a rehersal with my rock band and when i try to turn on the head the front ligths turn on but no sound was in the speakers then i loocked in the back and i saw the tubes and no one was runnig, i mean it was like all the tubes were turn off, but the front lights were running normally, since here there is not technical services or repair i'd like to check if its possible to me make something, i'll be very grateful and happy of someone could help me , thx for all the comunity

  2. #2
    Supporting Member Jazz P Bass's Avatar
    Join Date
    Dec 2008
    Wernersville, PA
    The power ON light is an integral part of the power switch itself.
    Switch ON/ Light On.
    It relies on the mains line voltage.

    To see why the tubes do not light up you will have to dig deeper.
    Last edited by Jazz P Bass; 04-05-2018 at 04:46 PM.
    antimisti likes this.

  3. #3
    Old Timer
    Join Date
    May 2006
    I would check the heater/filament voltages first.
    antimisti likes this.

  4. #4
    Senior Member
    Join Date
    Nov 2013
    Schematic is around the net, you have the first 2 preamp tubes in DC, and there are fuseable resistors on the lines.
    antimisti likes this.

  5. #5
    Senior Member Pedro Vecino's Avatar
    Join Date
    Jul 2006
    Your amp must be a export model. It must contain inside, on the board, a fuse holder marked as F1 with a 10A fuse. Remove it and check its integrity. If it is open that would be the reason why the tubes do not light up.
    Please, confirm this when you try it.
    g1 and antimisti like this.

  6. #6
    Junior Member
    Join Date
    Dec 2016
    thank you very much, everyone helps me, the problem was a fuse (f1) i´m so happy that was only that , i´ll save money for a tube set. this forum is the best
    g1 and The Dude like this.

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