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Heineken's Garage

  1. Radio Head Unit - Repair II

    .. continuation of Radio - Repair

    Too little Volume and Distortions increasing with Volume

    Observed on: 1 EUDM Radio
    Fixed by: OP amp replacement
    State: Fully understood

    The audio signal path on these radios is fully analogue with several operational amplifiers at various stages. One of them is IC303, a 20 V, 10 MHz quad operational amplifier from JRC/NJM: NJM2060M.

    Click image for larger version. 

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    IC303 at the rear end of the lower PCB
    ...

    Updated 12-07-2023 at 09:28 PM by Heineken

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