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H96 Pro plus voltages - no 3vs in board, no signal hdmi, no led light, no turn on - Pics HR inside

Discussion in 'Troubleshooting and Repair' started by CaLaVeRaK, Feb 16, 2019.

  1. CaLaVeRaK

    CaLaVeRaK

    1
    0
    Feb 16, 2019
    Hello everybody,

    I have a H96 pro + with failure in the power stages. The tv box just worked a couple of hours and went out, giving these cues.
    I have already checked the transformer, and it had the capacitors defective, which are already changed.
    Now I am reviewing the motherboard, and I have detected that it is failing in the power stages, and I can not find exact references to know what it might be.

    Attached photos with the values of volts which the board is showing.

    Somebody could help me?

    Thanks in advance.

    Pic with volts (https://www.dropbox.com/s/brls53eq3ez6znj/h96 pro plus volts.png?dl=0):

    [​IMG]

    Pic where you can see the ICs
    [​IMG]
     
    Last edited: Feb 16, 2019
  2. 73's de Edd

    73's de Edd

    2,558
    1,046
    Aug 21, 2015
    Sir CaLaVeRaK . . . . .

    Hey Feller . . . . where'd ya get that replacement UN - fusible resistor ?

    On the closest components marking . . . . is its marking being . . . DC ?=? E2H or E24

    If being E24 . . .suspect it to be this unit with voltage in at pin 1 and reg output at pin 5 .

    REFERENCE:
    upload_2019-2-16_18-35-59.png


    Or . . .
    Full Da-Da sheet . . . . .
    http://www.txsemi.com/Upload/TX6211B_V12-11264794020.pdf




    The others, A66MG ? , with their associated switching inductors, located on over to the right, look to be . . . .

    A66MG
    http://www.chipsourcetek.com/Uploads/file/TX9416_V1.0.pdf


    On the power connector , just to its right, there is a black electolytic which the power dumps into before being sent over to the right side circuitry . What is the DC voltage across that E-cap. Does it then feed into the left lead of the SUPER resistor ?

    Aside:
    You need . . . 1 yr hard core experience . . .for that soldering quality, to even start to meet Mil Specs or NASA Tech std 130 soldering standards . . . .

    73's de Edd . . . . .


    Teamwork is essential, since that then allows you to blame someone else.

     
    Last edited: Feb 17, 2019
    Tha fios agaibh likes this.
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