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Blown MUX

Posted by Michael Munson on October 18, 2010 at 5:49pm
Well I think I made a big mistake - I may have blown my MUX - On accident I messed up and cross plugged my esc in and may have added power instead of signal to one ESC input - What do I do now?  HELP!!!! Is my MEGA toast?? One ESC just beeps now - RX seems fine - other motors initialize just fine -


Mike

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Replies

  • Michael Munson October 21, 2010 at 6:41am
    Thanks guys - I ended up sending it back to spark fun for repair and ordered some extra MUX in case it ever happens again -

    Mike
  • Paul Jones October 21, 2010 at 1:29am
    Use a frying pan to heat the whole board up and pull off the mux chip with a pair of pliers (Don't bump it or other things will fall off!). Then you can use a normal soldering iron to replace it. Another way is to cut all of the pins on the mux or heat the leads one at a time and lift them up with a screwdriver. I had to replace my mux chip as well, it works great now.

    Good Luck!
  • Michael Munson October 19, 2010 at 6:00am
    Any US suppliers for thie Digikey seems to be out? Mike
  • Michael Munson October 19, 2010 at 5:46am
    I do have a new board on order but I think I read somewhere that it can be repaired with one of these http://uk.farnell.com/texas-instruments/cd74act157m/logic-quad-2-in... - Small soldering but I think I can do it - Can anyone verify that this is the correct MUX? Jordi? I think you repaired one at one time - Thanks guys

    Mike
  • Sebastian Gralla October 19, 2010 at 3:06am
    seems that only one output is blown
    you could remap it on one working output (which is not that easy)
    or buy a new APM
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