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Power unit from hifi problem

Discussion in 'Troubleshooting and Repair' started by philippe, Sep 1, 2015.

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  1. philippe

    philippe

    2
    0
    Sep 1, 2015
    Hello
    i do have a hifi amplifier

    two compoennet is geting hot very fast, as soon as i start the amplifier

    On transistor had failed
    I changed it , but as soon you start the power , it is getting hot verry

    on the schema it is the Q5 ans also R10 is getting hot

    Any idee , i did have problem to understand
    R16 ,D5 look ok
    i did have 15volt on U1 pin 15
    on my bord R42,R43 and Q7 is missing or shorted somehow

    see the file here
    https://drive.google.com/file/d/0B2Cwu0IkTCvtV0xGOGFTREVEcWs/view?usp=sharing

    You can find the full service manual just google
    labgruppen_fp2400q_v02_amplifier_service_manual


    thank you
     
  2. Alec_t

    Alec_t

    2,927
    797
    Jul 7, 2015
    The linked image is too low resolution to see the component numbers clearly :(.
     
  3. philippe

    philippe

    2
    0
    Sep 1, 2015
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