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Ibanez AEQ SS Repair

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  • Ibanez AEQ SS Repair

    Hello to anyone reading. I am new to the forum and am attempting to repair my Ibanez AEQ SS preamp. I wanted to run the scenario by some folks who know more than I do about this kind of thing before I start digging in.

    Basically long of the short is that I installed the battery in my Ibanez AEL-20 backwards like an idiot because I was distracted and in a hurry, and it took all of 2 minutes for me to realize I had no sound and pull the battery back out. Thats all it took, and later upon removal and inspection, I noticed a "chip" in the center of the circuitboard that was burned. I'm kind of a jack-of-all trades person, so having worked on car stereo amplifiers and home stereos among other things, I figured that would be a good place to start. Doing a little searching on what happens when you put a battery backwards in an acoustic guitar preamp I noticed a post where someone said "transistors make better fuses than fuses" so I searched the numbers on the transistor and was fairly certain that the first character was actually the Texas Instruments logo, and sure enough I have two (in case I ruin one) TLC2264C transistors on the way. I plan on sharing the results, because I see that TONS of people have problems with the AEQ SS and hopefully this might help,but I also wanted to ask if anyone has advice on this project i.e. if I should use a special solder tool to prevent overheating, any special type of solder, best way to remove the old transistor without making a huge mess or scoring the board. Basically if anyone has any pointers to offer I'd appreciate it.
    This is just the way I repair things; start cheap and easy, and go up to more expensive/difficult routes, so if I ruin the preamp I'm just planning to learn how to build a simple signal booster on my own, as my Promag Plus provides WAY better sound than the AEQ ever could have ever asked for as a Christmas wish. I plan on using the Fishman however I can as a pickup to put sound to effects/distortion and play with two outputs so I can have acoustic AND electric sound simultaneously, again, just cuz I'm a man and this is what we do: silly unecessary things for no other reason than "because I can". Thanks!
    -Josh

  • #2
    I would assume that the circuit components are smd.
    Last edited by Jazz P Bass; 08-29-2015, 05:05 PM.

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    • #3
      Of course this is not a transistor but rather operation amplifier consisting internally (possibly) of hundreds of transistors.
      Here are some photos of the preamp: AEQ-SST preamp stopped working. Does any other preamp fit... - Technical Support - Ibanez Forum
      You need good soldering skills in order not to destroy the PC board. There are many tutorials on YT showing how to desolder the opamp. The key phrase is "chip quik".
      You can see it for example here: https://www.youtube.com/watch?v=7kyaz4Zrd78

      Mark

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      • #4
        Texas Instruments - datasheet pdf

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        • #5
          Does it look like the one on the photo below? I was fixing it a year ago.

          Mark

          Click image for larger version

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