LXX Scale Racer – reverse dead

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    • March 12, 2004 at 8:53 pm #12050
      Avatar photoKerosene
      Participant
      • Posts: 329

      Reverse died suddenly, I saw smoke – not sure where it came from. It looked impressive for a few seconds until I realized what had happened.

      Forward, left and right still work fine.
      Is there anything I can do?

      Or is it a sign from above to get a Mini-Z.

    • March 12, 2004 at 9:25 pm #50023
      Avatar photoph2t
      Participant
      • Posts: 2088

      sounds like half of the fets are fried….Can you take a pic of the PCB?

    • March 12, 2004 at 11:28 pm #50026
      Avatar photoKerosene
      Participant
      • Posts: 329

      The motor still goes backwards when I switch the wires, so it must be the PCB somewhere.

      I’ll take some pics later when I get home.

    • March 13, 2004 at 1:48 am #50029
      Avatar photoKerosene
      Participant
      • Posts: 329

      Here’s a pic. Sorry about the quality.

      lxxpcb.jpg

    • March 13, 2004 at 3:15 am #50030
      Avatar photoAaron
      Keymaster
      • Posts: 2146

      My guess would be that the secret ingredient of the Reverse FET has escaped.

      Pefect time to FET mod… even a little 2×2 stack pair would be nice 😉

      A.

      --
      Site Owner Guy.

    • March 13, 2004 at 3:35 am #50031
      Avatar photoph2t
      Participant
      • Posts: 2088

      Kero, a few things man….

      First I want to confirm that the two solder pads on the left with the holes in the PCB are the two pads you screw the motor terminals into???

      If there are…..

      The left side has two small packaged chips, each with 8 pins, 4 on each side. Looking at the top one of the two you will notice strange marks? Perhaps it’s dead…..

      I say remove BOTH fets and fet mod it with some IRF7389’s…

      Cheers,

      ph2t.

    • March 13, 2004 at 3:48 am #50033
      Avatar photoKerosene
      Participant
      • Posts: 329

      Yep the two holes are for the motor terminals. Things could get ugly if I try replacing the fets. I don’t really know what I’m doing.

    • March 13, 2004 at 5:26 am #50034
      Avatar photomicro_Amps
      Participant
      • Posts: 1290

      Hey Kero, guess what…
      :)uA

    • March 13, 2004 at 6:27 am #50035
      Avatar photoPork_Hunt
      Participant
      • Posts: 349

      Scale racers are good for FETting. The boards are very similar if not identical to a Mini-z board, but UPSIDE DOWN. In a Kyosho Mini-z the fets are on the underside of the board, in the LXX, they are on top. Stack ’em high!

    • March 13, 2004 at 1:31 pm #50036
      Avatar photoKerosene
      Participant
      • Posts: 329

      FET mod it is then!

      You have mail micro 🙂

      Edited by – Kerosene on 13 March 2004 08:54:30

    • March 13, 2004 at 2:08 pm #50037
      Avatar photoph2t
      Participant
      • Posts: 2088

      Hmm, we have 4 Melbourne pukes with mini-z’s or mini-z clones……….. C’mon we’ve gotta have a meet soon!

      ph2t.

    • March 13, 2004 at 2:29 pm #50039
      Avatar photoKerosene
      Participant
      • Posts: 329

      Yeah count me in. I’d like to see a real deal mini-z in action.

    • March 13, 2004 at 10:20 pm #50040
      Avatar photobetty.k
      Participant
      • Posts: 2487

      jamie k is heading our way in april i think. should be enough time to get something together! i’m dying to see a blown z in action:p:8ball:

    • March 13, 2004 at 10:23 pm #50041
      Avatar photomicro_Amps
      Participant
      • Posts: 1290

      Once I get my hop ups organised I’ll be pushing for the same thing. I’ll bring an Xmod as well 😀
      :)uA

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