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Focal Cub 3 won't start

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    #21
    Re: Focal Cub 3 won't start

    Hi everybody,

    I rescued a PSB SubSeries 1 from the trash only to find it is blowing fuses.

    It has the same 600088 power supply board as the Cub Focal unit shown above.

    It had blown the IRF740's and the IRF9530 with the thermistor on it. I am also in the process of replacing the two 220uF 200V capacitors as they are reading under 200uF.

    After replacing the MOSFETs and the DB6 (NTE6412) DIAC (I have some of these if anyone is after some) it is still not providing DC output at the white connector.

    I have checked the capacitors, all resistors, output side diodes and regulators.

    I am using a low current high DC voltage power supply to power the hot side and it has now started a slow clicking noise.

    Any advice on what to check next?

    Does anyone have the actual schematic for this 600088 version of the power supply? The service manual I have is for the 600101 - which is not the same.

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