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Imac 27" 2011 POwer supply

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    Imac 27" 2011 POwer supply

    Hi

    I've got a lot of power supply for Imac 27" model 614-0446 (or PA-211-02a), that don't work.
    No component blow, fuse good, 390V on primary caps.
    I've check no short on secondary, i've tried to change all capacitors on primary and secondary without success.

    I suppose a serial problem on these power supply, more than 10 pcs with same problem.

    Anyone can help me on this? Many thanks!

    Luke

    #2
    Re: Imac 27" 2011 POwer supply

    Most likely the PWM/SMPS IC and/or the Transformer start up circuit has some open resistors
    Last edited by Andrew F. Ali; 10-06-2018, 06:16 AM.

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