Question about Sony MHC-G100 Shelf System

1 Answer

Standby led sony MHC-GNZ888D blinking (intermitent)

The standby led was blinking, and I cannot switch on the unit.
But it is intermittent, sometime the unit working properly and suddenly switch off and standby led blinking again.
Which the part was problem?

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  • 4 more comments 
  • patno72 Jan 14, 2009

    Dear Nuwan chinth, thanks for your answer.
    This is helpful, but it is so global answer : )
    Could you narrow the problem ?
    If the problem on the power supply or power amp, which the component was broke ?
    Any body,s suggestion are welcome




  • patno72 Jan 15, 2009

    I have checked the connection , and no problem.
    When problem occured , I hear sound like mousquito sing at power supply part.
    But when the unit working properly, the sound (mousquito sing) is mute
    is it problem problem caused the condesator or ic or transistor or zener diode ?

    Thanks



  • patno72 Jan 15, 2009

    Dear Nuwan, Thanks for your suggestion.
    Where is the position of the relay, on power supply board or on Power amp board ?

    Thanks


  • patno72 Jan 15, 2009

    Thanks for your fast respone.
    A little question : on the manual guide said, if we close the ventilasi of the fan, the standby led will blinking.
    What is the sensor on the unit to detect it ? Is this temp sensor or light sensor or other ?





  • patno72 Jan 16, 2009

    I'll try to send the manual to you.
    I will explore the unit to check the relay, and inform you for the result
    Thx


  • patno72 Jan 21, 2009

    I have explored the unit.
    But I did'nt find the relay.
    any suggestion ?

    thx


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Power amp.or power supply printed circuit board.

nuwan.

Posted on Jan 13, 2009

  • 2 more comments 
  • nuwan chinthaka
    nuwan chinthaka Jan 15, 2009

    first of all check the power supply for loose connections.



    then try others.

    i will help you.

    nuwan.

  • nuwan chinthaka
    nuwan chinthaka Jan 15, 2009

    ok,please observe one of relay swiched when the problem occured.it will happence simultanionsly.it is speaker protection or stanby relay.please tell which relay turnd on .stanby relay is closed to power suplly circuit and anotherone is closed to speaker connector.

    nuwan.

  • nuwan chinthaka
    nuwan chinthaka Jan 15, 2009

    please find the relay yourself.power relay can place power supply board and speker protection board can place closed to power amp board or bouth can placed same board the power amp board.

    nuwan.....

  • nuwan chinthaka
    nuwan chinthaka Jan 15, 2009

    IT SHOULD BE THERMISTER.closed to fan or heatsink.(2pin device).

    IF YOU HAVE ANY OF MANUAL PLEASE EMAIL IT TO ME.

    roshanw@ccl.lk



    nuwan.

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