1. Please take 30 seconds to register your free account to remove most ads, post topics, make friends, earn reward points at our store, and more!  

Fender Rumble 40 v3 Schematics

Discussion in 'Amps and Cabs [BG]' started by bassliner50, Oct 26, 2016.

  1. Hi all, my Fender Rumble 40 v3 developed an intermittent problem, where the sound of my bass goes from normal to much lower and distorted then back to normal, then low. I bought this amp used so it is not covered by any Fender warranty. I'd like to repair it myself. I suspect the problem resides on the preamp board and may be caused by a bad solder joint or intermittent op-amp chip. A schematic would be so helpful in the diagnosis of this issue. Does anyone know where I could obtain one? Thanks..
  2. Linnin


    Jul 19, 2012
    Linningrad, Earth
    F.M.I.C. hasn't released any of the V3 Rumble schematics online yet, as I'm sure you've noticed. Have you called Fender and asked for a pdf? If you know someone at an authorized Fender service center they might run off a copy for you, or just call the service center and ask, but that's about it.
  3. Thanks for your response Linnin. Sure I did hunt online for a schematic.pdf, also I emailed Fender customer service for the same, but have not received a response. The way my amps problem comes and goes frequently makes me think there is a ratty solder connection some where. Close examination and poking around while running an audio signal has not uncovered anything. Pretty sure the problem resides in the preamp section. Flakey op-amps could cause symptoms like this but I am inclined to think the problem would be of a longer duration and not so intermittent if it were a failing IC. The search continues...
    Linnin likes this.
  4. Linnin


    Jul 19, 2012
    Linningrad, Earth
    None of my 8 Fenders over the past 46 years have ever given me a problem.
    But when life gives me problems I do drink heavily. It doesn't help, but it is fun. For a while.
    Old Garage-Bander likes this.
  5. (reaches for the Cabernet.)
    Linnin and Old Garage-Bander like this.
  6. Primary

    Primary TB Assistant

    Here are some related products that TB members are talking about. Clicking on a product will take you to TB’s partner, Primary, where you can find links to TB discussions about these products.

    Apr 17, 2021

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.