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UNPLANNED DOWNTIME: 12th Oct 23:45

Battery leak in preamp - fixable?

PolarityManPolarityMan Frets: 7159
in Acoustics
I played my Yamaha acoustic for the first time in a while today and the preamp wasn't working. It's the type that takes 2 AA batteries in a compartment that entirely comes out and turns out a bettery had leaked. I scraped off the residue and put new batteries in but no joy. Couldn't see any leakage on the part inside the guitar. Any idea what could be wrong?
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Comments

  • ICBMICBM Frets: 69426
    It's likely the terminals are corroded. You may have to dismantle the battery holder completely and clean the contacts, or re-solder them where the wires are attached (usually crimped), this is a common failure point.

    If that doesn't fix it you may have to replace the holder, if it's separate from the preamp.

    "Take these three items, some WD-40, a vise grip, and a roll of duct tape. Any man worth his salt can fix almost any problem with this stuff alone." - Walt Kowalski

    "Just because I don't care, doesn't mean I don't understand." - Homer Simpson

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  • PolarityManPolarityMan Frets: 7159
    You thinking the terminals in the removable part or both sets? I gave it a bit of a clean for the removable part but didn't dismantle it.
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  • ICBMICBM Frets: 69426
    Both, but especially in the removable part where most of the corrosion will have been. If it's a typical 2-battery holder there will be a connection between the two batteries at the far end, it may well be there.

    "Take these three items, some WD-40, a vise grip, and a roll of duct tape. Any man worth his salt can fix almost any problem with this stuff alone." - Walt Kowalski

    "Just because I don't care, doesn't mean I don't understand." - Homer Simpson

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  • PolarityManPolarityMan Frets: 7159
    I shall see if i can dismantle it a bit and figure it out..presumably should be easy to visually see it or do i need to test continuity?
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  • Danny1969Danny1969 Frets: 9752
    Have you got a meter that can read volts ? if the batteries go in series (opposite way to each over ) you will have 3V ish coming out the battery box and you can then assume that bit is good  
    www.2020studios.co.uk 
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