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Trying to resolve issue with electronic gadget

Discussion in 'General Electronics Discussion' started by rnbguy, Jun 6, 2011.

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  1. rnbguy


    Jun 6, 2011
    Hi Guys,

    I've got this circuit I'm trying to test U1 which is an IC driver. I'm trying to identify if the driver is dead by measuring the voltage on pin 1OUT, I'm getting no voltage and no amps from that pin. Every other pin both in and out are reading ~11.5volts. Can someone point me in the right direction of how this works.

    Please know I'm new to this[​IMG]
  2. poor mystic

    poor mystic

    Apr 8, 2011
    Hi rnbguy
    would you please post more information, such as where the board comes from? This might help or it might not...
  3. shrtrnd


    Jan 15, 2010
    U1 may be bad, but with 11.5V on every other pin, you've got other problems.
    Start with your power supply and work your way to this circuit. I'd pay particular attention
    to C5 & C6.
  4. poor mystic

    poor mystic

    Apr 8, 2011
    Seems like good advice.
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