AD-80 pic request

Discussion in 'Effects, Pedals, Strings & Things' started by rogue.guineapig, Jun 21, 2008.

  1. rogue.guineapig

    rogue.guineapig Member

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    I recently acquired an AD-80 on trade...
    it's missing it's battery terminals, and I'm trying to
    solder some in...correctly.
    Anyone got a nice pic of an AD-80 PCB from the top
    that shows which of the red/blacks line up to the
    battery clips?
    thanks!
     
  2. eric-d

    eric-d Member

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    I assume you mean the vintage Ibanez and not the Maxon .....
     
  3. rogue.guineapig

    rogue.guineapig Member

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    indeed sir! the one that took two 9v batts.
     
  4. EXP

    EXP Supporting Member

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    I can take a pic of my AD-80. Give me a day or so shoot me a PM to remind me.
     
  5. duende

    duende Member

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  6. rogue.guineapig

    rogue.guineapig Member

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    I've been to that link...soooo close to what I need!
    thanks for posting it tho...
    My AD-80 won't power on. I know power is GETTING to it,
    but outside of that I know little. I can trace the signal thru
    with an audio signal tester, but I don't get beyond the
    first TL022CP chip. I'm wondering if nothing is getting power..
    the LED doesn't light up at all either.
    Oy vey, what a mess...
     
  7. stinkfoot

    stinkfoot Member

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    Are you sure the pedal gets the full voltage it needs? The AD-80 uses two 9v batteries wired in series for 18 volts (which is then regulated down to 12 volts internally). The board pic on the page linked to earlier (http://www.sonicurbs.com/ibanezAD-80/board.jpg) shows the wiring quite clearly. The +18v battery input is just to the right of the adapter jack, above the polarity protection diode. Also to the right of the jack, along the bottom edge of the board, is the point where the two batteries are connected. It looks that way, at least, going by the picture of the back of the board (the main ground plane looks like it is snaking arount the point where those two wires are soldered, making them an island of its own, so to speak). The main battery negative is wired to the input jack "ring" terminal, as usual.

    Here's how to do it. You need two battery clips with wires.
    • The red wire on battery clip 1 goes to the main +18v battery input point (as described above).
    • The black wire on battery clip 1, along with the red wire on battery clip 2, goes to the two points along the lower edge of the board. It doesn't matter which wire goes into which of the two holes, as both are simply connected on the other side. If you look closely at the pic, you'll see that the two wires are actually soldered to the "wrong" terminals - the black wire is soldered where it says "red" and vice versa :D You can also make this connection off the board, if you like - simply twist and solder the two wires together, and cover the join with shrink tubing.
    • Finally, solder the black wire from battery clip 2 to the "ring" terminal on the input jack.
    You should now have +18 volts flowing into the pedal!

    /Andreas
     
  8. rogue.guineapig

    rogue.guineapig Member

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    Hey Andreas,


    I think I've gotten that far..still no go. (no power on, no sound).
    Here's what I did:

    I saw the red and black wires going to one solder joint on the board,
    and concluded that they were Red#1, and Black #2.
    So I took Red # 1 & Black #1 and soldered them to a jack for a barrel connector.
    I took Red #2 and Black #2 and did the same.
    (this way, the red1 and black1 which go down to the PCB and are soldered together
    are not on the same power input.)
    Why did I do this? simple. Batteries are spendy...especially here!
    I wanted to connect two 9V power supplies straight into the battery leads.
    I have one power input (battery clip pair) getting it's power from a Boss Power
    supply (9v), and another power supply giving the other battery clip it's power.
    The voltages, read off the PCB with a voltmeter indicate 9.3V on one and 9.5 on the other..
    so I know it's getting power.
    But it still won't turn on.
    Using the voltmeter, and the signal tester I have deduced the following:
    The power is flowing on to the PCB.
    The Switch does indeed work. (it's a momentary contact switch)
    Part of the PCB is cracked, (see pix), and so I had to jumper a spot.
    The Jumper is in fact working correctly, and I have continual flow thru it.
    The sound comes in thru the jack correctly, and goes thru the first cap
    correctly. I do believe it then goes thru a few resisters.
    THEN it continues into a TL022CP chip, where it does go thru, and stops after
    that. Being as I cannot read schematics well, I don't know where the next component is.
    At the LED, 140 mV were read.

    Not necessarily.
    Is there a spot on the board where I should be able to take an 18V reading?
    I've taken readings on the power inputs on the board and I only get 9.

    more questions:
    do certain components in pedals only pass sound when they are powered?
    what would these be generally?
    if there was something wrong on the audio chain, would it prevent the
    pedal from powering on?


    Here's pictures to help describe what words have failed:
    http://s133.photobucket.com/albums/q64/yitzachm/
    This is my Photobucket album...there's 4 random pix of my home area
    and the rest are this pedal.
    Any help I can get would be awesome...I'd love to get this up and running.
    Thanks!

    RGP
     
  9. rogue.guineapig

    rogue.guineapig Member

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  10. rogue.guineapig

    rogue.guineapig Member

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    bumping again....anyone ever work on one of these things?
     

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