Ipod dock noise eliminator while charging

Discussion in 'General Electronics Chat' started by poohjangim, Sep 3, 2009.

  1. poohjangim

    Thread Starter New Member

    Sep 2, 2009
    2
    0
    HI EVERYONE:

    I already figured it out to play and at the same time charge the ipod but there is a noise while playing the ipod. There is more noise I can hear when the display light of the ipod is on.

    I decided to open one amplifier of my friend with ipod dock. This amplifier can play the ipod and charge it at the same time without noise. I trace the section where the pins of ipod are connected. Attached herein is the circuit I traced.

    Please help me to come up with the circuit. I can't figure what kind of circuit it is and what kind of transistor they used because it is in SMT type. Th label on the transistors are not reliable information to what kind of transistor.

    Please help me. I will worship anyone who can save me.
    thanks in advance.
     
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