dead volume knob

Discussion in 'PTC - PRS Tech Center' started by jxe, Jan 9, 2020.

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  1. jxe

    jxe babe en der wood

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    hey everybody, i have a prs something22 with the 5-way rotary, and lately the volume knob doesn’t seem to do anything at all. i opened up the back to see what’s what and noticed a bare ground wire (from the bridge i think) was snapped, plus it looks like something else might be missing — there’s a glob of solder on the back of the volume knob, but it looks too big for the ground wire:

    [​IMG]

    a closer look:

    [​IMG]

    that little bare wire on top of the grey wire is not connected to anything, and the empty solder is on the right side of that knob in both pics. any ideas what to do to bring the volume action back?
     
    #1 jxe, Jan 9, 2020
    Last edited: Jan 9, 2020
  2. RickP

    RickP Established 1960, Still Not Dead

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  3. jxe

    jxe babe en der wood

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    thanks for the reply — the third lug is in fact bent up and soldered to the back of the knob housing like the diagram, looks like the only difference is the bridge ground snapped off the solder joint. i wouldn’t think an ungrounded bridge would bypass the volume, but i’ll reattach it and see.
     
  4. RickP

    RickP Established 1960, Still Not Dead

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    No, you're right... it might add some buzz, but shouldn't keep the volume from coming through.
     
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  5. bodia

    bodia Authorities said.....best leave it.....unsolved

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    That bare wire is the ground wire that's attached to the trem claw. It needs to be soldered back on top of that volume pot.
     
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  6. Rider1260

    Rider1260 New Member

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    Nothing in that pic suggests anything other than a failed pot , if it's not working anymore.
     
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  7. jxe

    jxe babe en der wood

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    this is what i was getting at, in a roundabout way - never had to replace one, guess i’ll have to start.
     
  8. RickP

    RickP Established 1960, Still Not Dead

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    I believe you can bypass the pot by shorting across the 1 and 2 lugs (not the ground one) to bypass the wiper. Might try that first. Could be a dead pickup, broken wire somewhere, broken rotary contact.. lots of possibilities.
     
  9. shimmilou

    shimmilou Established in 1963

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    Knob, or pot? Never heard of a dead knob.o_O
     
  10. alantig

    alantig Zombie Four, DFZ

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    Not in this forum, you didn’t!
     

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