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weird problem, no signal except when cable is 3/4 of the way plugged in

Discussion in 'Pickups & Electronics [BG]' started by seamus bass, Aug 15, 2012.


  1. seamus bass

    seamus bass

    Oct 23, 2007
    my house
    just as the title says, also when its plugged in 3/4 of the way, only of the pots do anything, the blend knob(which seems to only change the tone for the neck pickup, and its louder when rolled all the way out in either direction). i have a preamp on board as well, no loose connections, soldering is good, jack is good. switched out numerous brand new batteries as well
     
  2. Andyman001

    Andyman001 Supporting Member

    Feb 11, 2010
    Idaho
    Has it worked before?
     
  3. seamus bass

    seamus bass

    Oct 23, 2007
    my house
    yeah worked fine last night for practice, i switched out a dying battery and then it stopped working.
     
  4. DBCrocky

    DBCrocky

    Oct 18, 2011
    Cary, NC
    Have you got a stereo jack or stereo plug?
     
  5. seamus bass

    seamus bass

    Oct 23, 2007
    my house
    yes jack is stereo
     
  6. Andyman001

    Andyman001 Supporting Member

    Feb 11, 2010
    Idaho
    Try another battery?

    Nevermind (facepalm)

    check the battery clip leads?
     
  7. seamus bass

    seamus bass

    Oct 23, 2007
    my house
    battery leads are good too
     
  8. maybe your cable is wonky
     
  9. hover

    hover

    Oct 4, 2008
    Massachusetts
    Yeah, I'd look into that cable....have you tried a different stereo cable?
     
  10. seamus bass

    seamus bass

    Oct 23, 2007
    my house
    yes numerous, plus the same setup ran fine with another bass
     
  11. seamus bass

    seamus bass

    Oct 23, 2007
    my house
    possible preamp problem?
     
  12. Andyman001

    Andyman001 Supporting Member

    Feb 11, 2010
    Idaho
    Possible, gonna think about it. Ill check in when i get home from work>
     
  13. ctmullins

    ctmullins fueled by beer and coconut Gold Supporting Member

    Apr 18, 2008
    MS Gulf Coast
    I'm highly opinionated and extremely self-assured
    Check for continuity between the jack ring terminal and the jack tip terminal - there should be none. Do this while the battery is disconnected.
     
  14. Hapa

    Hapa

    Apr 21, 2011
    Tustin, CA
    If its a stereo jack then:
    unplug and plug in a few times or with a toothpick make sure the clips are not getting caught on each other.

    When changing the battery the ground could have jostled loose the wire to the battery terminal.
     
  15. seamus bass

    seamus bass

    Oct 23, 2007
    my house
    so heres where im at, all wiring looks fine, still no sound,except with cable 3/4 of the way in, with this only the pickup blend know works still, its running passive this way, bridge pickup is not responsive as well.
     
  16. hover

    hover

    Oct 4, 2008
    Massachusetts
    Maybe the blend pot has shunted in some way.
     
  17. ctmullins

    ctmullins fueled by beer and coconut Gold Supporting Member

    Apr 18, 2008
    MS Gulf Coast
    I'm highly opinionated and extremely self-assured
    (Double post; sorry)
     
  18. ctmullins

    ctmullins fueled by beer and coconut Gold Supporting Member

    Apr 18, 2008
    MS Gulf Coast
    I'm highly opinionated and extremely self-assured
    So when you say the wiring "looks fine", is that assessment due strictly to a visual inspection? Because lots of wiring problems "look fine" to the eye. You really need to break out the multimeter, and systematically check everything. Without a meter, you can drive yourself crazy chasing your own tail.
     
  19. seamus bass

    seamus bass

    Oct 23, 2007
    my house
    thanks for the replies gang, i had my long time tech look at it and everything too him looked ok as well,multimeter check as well as troubleshooting the jack. im having another tech i know who is more circuit board savy take a look tommorrow.
     
  20. bassbenj

    bassbenj

    Aug 11, 2009
    Well, my guess would have been the jack. I've seen lots of wonky things where the tabs that rub against the plug lose tension or short against each other or other things. Sometimes it happens down in the plug where you can't see it. So a meter check is necessary.

    I've seen cheapo cables that were undersized that you had to pull slightly out of the jack to make contact, but 3/4 of the way out seems to say to me that you are having the tip make contact with the battery negative to get any signal through! This sort of points to perhaps a battery lead short or maybe a short in some other wiring.

    I guess trying the new tech is next.
     

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