Results 1 to 14 of 14

Thread: Circuit board found in 20+ year old Ibanez Tele

  1. #1
    Junior Member
    Join Date
    Apr 2019
    Posts
    10

    Default Circuit board found in 20+ year old Ibanez Tele

    Hello everyone. I'm restoring an old Ibanez Tele and found a circuit board hiding under the bridge pickup. I believe it's from an old MXR distortion pedal but I'm not sure. It seems that most the old MXR circuit boards had 5 wires and this one has 6. I would like to keep it in there but I need to figure out the wiring as it has issues that I can't figure out. Any help appreciated!

    Regards

    Kilroy

    Click image for larger version. 

Name:	bottom of circuit board.jpg 
Views:	16 
Size:	83.3 KB 
ID:	97539Click image for larger version. 

Name:	diagram.jpg 
Views:	18 
Size:	42.2 KB 
ID:	97540Click image for larger version. 

Name:	top of circuit board.jpg 
Views:	18 
Size:	73.6 KB 
ID:	97541

  2. #2
    Her Little Mojo Minion DankStar's Avatar
    Join Date
    Mar 2006
    Location
    Mosh Pits of Utumno
    Posts
    14,471

    Default Re: Circuit board found in 20+ year old Ibanez Tele

    Cool find

  3. #3
    Junior Member
    Join Date
    Apr 2019
    Posts
    10

    Default Re: Circuit board found in 20+ year old Ibanez Tele

    LOL after researching for hours I thought I would post for help and then? I found a match. Looks like it's an early MXR M-133 Micro Amp.Name:  1982 MXR Micro Amp M-133.jpg
Views: 89
Size:  9.3 KB

  4. #4
    Sock Market Trader GuitarStv's Avatar
    Join Date
    Dec 2004
    Posts
    13,728

    Default Re: Circuit board found in 20+ year old Ibanez Tele

    Do you have to plug a battery into it to get it to work?
    Join me in the fight against muscular atrophy!

    Quote Originally Posted by Douglas Adams
    This planet has - or rather had - a problem, which was this: most of the people living on it were unhappy for pretty much of the time. Many solutions were suggested for this problem, but most of these were largely concerned with the movements of small green pieces of paper, which is odd because on the whole it wasn't the small green pieces of paper that were unhappy.

  5. #5
    Junior Member
    Join Date
    Apr 2019
    Posts
    10

    Default Re: Circuit board found in 20+ year old Ibanez Tele

    Yes there is a battery in one of the cavities.

  6. #6
    LoveMachineologist jeremy's Avatar
    Join Date
    Mar 2004
    Location
    albany, ny
    Age
    42
    Posts
    28,893

    Default Re: Circuit board found in 20+ year old Ibanez Tele

    thats kinda cool

  7. #7
    Mojo's Minions
    Join Date
    Jan 2013
    Posts
    3,745

    Default Re: Circuit board found in 20+ year old Ibanez Tele

    And?

    What does it do?
    "New stuff always sucks" -Me

  8. #8
    Junior Member
    Join Date
    Apr 2019
    Posts
    10

    Default Re: Circuit board found in 20+ year old Ibanez Tele

    I've figured out why it wasn't working now. One of the pickups ground was going into the MXR circuit board and wasn't grounded anywhere else and it had a 25K volume pot instead of 500K. I'll hopefully have some time tonight to sort that out. The boost is 26 dbl. so I think I need to figure out how to tame that a little as well.

  9. #9
    Junior Member
    Join Date
    Apr 2019
    Posts
    10

    Default Re: Circuit board found in 20+ year old Ibanez Tele

    Adieu it's a straight 26dbl boost.

  10. #10
    Administrator Mincer's Avatar
    Join Date
    Mar 2004
    Location
    Tampa Bay area, Florida, USA
    Posts
    20,682

    Default Re: Circuit board found in 20+ year old Ibanez Tele

    Wow, that is quite a project, that apparently didn't work. Good detective work, though! Are you going to try to wire it back in, or scrap it all?
    Dave, Ambassador/Writer/Artist for Seymour Duncan

    My Guitar, Gear, and Music Webpage

    Gear pics and more on my Instagram.

  11. #11
    Junior Member
    Join Date
    Apr 2019
    Posts
    10

    Default Re: Circuit board found in 20+ year old Ibanez Tele

    Click image for larger version. 

Name:	Capture.jpg 
Views:	12 
Size:	55.1 KB 
ID:	97726That's right. Guitar was noisy and terrible sounding which is why it's been in a closet for more than 20 years. I'm going to wire it up like the original installer was trying to do. I actually don't have that much to do to fix it. rewire the ground and put in a new SPDT 2 way switch and 500K pot. Should have it done tonight. I'll let you know if it works and how it sounds. I'm thinking a 26db boost is way too much so I'm going to research how to lower the maximum boost setting. It's been a very interesting project from trying to figure out what the heck the circuit board was from to learning a bit about making layout drawings and now to fix it.


    Maybe someone with electronics experience can review and provide some feedback?
    Last edited by Kilroyonguitar; 04-22-2019 at 02:01 PM.

  12. #12
    Slutbucker Pimpologist ArtieToo's Avatar
    Join Date
    Mar 2004
    Location
    Jacksonville, FL
    Age
    65
    Posts
    19,047

    Default Re: Circuit board found in 20+ year old Ibanez Tele

    Keep in mind that if the volume control was after the amp. then 25k could be the proper value.

  13. #13
    Junior Member
    Join Date
    Apr 2019
    Posts
    10

    Default Re: Circuit board found in 20+ year old Ibanez Tele

    I don't think it is. I'm not 100% sure this schematic is the same year but I don't think they would have varied much.

    Name:  333.gif
Views: 26
Size:  6.8 KB

  14. #14
    Slutbucker Pimpologist ArtieToo's Avatar
    Join Date
    Mar 2004
    Location
    Jacksonville, FL
    Age
    65
    Posts
    19,047

    Default Re: Circuit board found in 20+ year old Ibanez Tele

    Cool schematic. I thought that maybe that pot came after the amp.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •