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UM3482 Melody IC

Discussion in 'Troubleshooting and Repair' started by vick5821, Aug 9, 2012.

  1. vick5821

    vick5821

    700
    0
    Jan 22, 2012
    Hey guys, recently I bought this IC and it seems not to be UM3482. I constructed the circuit based on the datasheet and for my old UM3482 with broken legs, it will produce sound.

    But I bought this
    [​IMG]

    which in terms do not giv me any effects in the same circuit. Is it the same IC or ?

    Thank you
     
  2. Harald Kapp

    Harald Kapp Moderator Moderator

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    1,844
    Nov 17, 2011
  3. vick5821

    vick5821

    700
    0
    Jan 22, 2012
    Then I think it will be the IC got problem ?
     
  4. Harald Kapp

    Harald Kapp Moderator Moderator

    9,136
    1,844
    Nov 17, 2011
    Probably yes.
     
  5. vick5821

    vick5821

    700
    0
    Jan 22, 2012
    How can I proof that it is spoiled and as for refund ?
     
  6. papaj

    papaj

    1
    0
    Oct 7, 2016
    Try shorting the pins 13,14,15 (osc pins) without power of course. Mine circuit I short these pins every time I change the values of resistor and caps in those pins.
     
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