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help with QSC PLX 2402 amp

Discussion in 'Amps and Cabs [BG]' started by subdude67, Nov 20, 2012.

  1. subdude67


    Jan 18, 2010
    the band i recently joined uses 2 QSC amps, unfortunately one of them stopped working.

    according to the local tech these 2 components are broken:


    local shops don't have these parts available, many don't know what they are anyway so can anybody help me to source them?

    many thanks!
  2. Unfortunately your picture isn't clear enough for me to see the part number clearly but go here www.digikey.com and type into the search field the part number that starts with 'I' and ends with, I think, a 'C'.
  3. murphy

    murphy Supporting Member

    May 5, 2004
    Toronto, Canada
    Just contact QSC and I'm sure they will have a local repair centre sort you out.
  4. Zooberwerx

    Zooberwerx Gold Supporting Member

    Dec 21, 2002
    Virginia Beach, VA
    Contact TBer Bob Lee http://www.talkbass.com/forum/member.php?u=17254 for assistance. If he can't help you, nobody can.

  5. subdude67


    Jan 18, 2010
    i doubt they have a service center anywhere on the whole continent!
  6. subdude67


    Jan 18, 2010
  7. The important information is the part number/s which are on the other side.

    Something like these
    Cxxxx - (2SCxxxx but the 2S is not printed)
    Jxxxx - (again 2S not printed)
    (or something else)

    There could also be a date code something like 0248 (2002 week 48) and a manufactures symbol.

    Good clear photos of what is printed on them are essential as the list of possible devices goes on forever.
  8. subdude67


    Jan 18, 2010
    we practise today so i will take better pictures, many thanks
  9. subdude67


    Jan 18, 2010
    here is a better image of the parts:

  10. That's much better.

    The manufacturer is IXYS
    Part number IXGH 32N60C

    produced in week 36 of 1999

    They are specialised switching transistors and should be replaced with only that part number.
  11. subdude67


    Jan 18, 2010
    i have checked on the mentioned site and found the parts, many thanks to all!
  12. ThisBass


    Aug 29, 2012
    I'm wondering a bit because the two transistors probably died just the same moment.
    In general that indicates another fault/defect somewhere in the narrow circuit.
  13. subdude67


    Jan 18, 2010
    hey ThisBass, thanks for bringing it up. do you have anything specific in mind that i should look into?
  14. As they are used in either a switched mode power supply or a chopped output stage* (class D etc.) then you need to check absolutely everything in that section. Otherwise you could be putting in a repeat order after the first switch on.

    * I don't know which as I have not seen a schematic for this amp (but would be very interested to see one).