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no voltage on T_con TV Toshiba 39L4333 DG

ratel 18570 5
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Treść została przetłumaczona polish » english Zobacz oryginalną wersję tematu
  • #1 15394153
    ratel
    Level 11  
    Hello
    I am repairing the Toshiba 39L4333 dg, it was in worse condition than I expected.
    Currently, it turns on and off normally, the backlight normally follows the voltage on the CN3 VF1_VF2 81v, F3_VF4 49v, FB1_FB2 43v FB3_FB4 6.1v connector, the main connector is also correct. The matrix changes only the vertical stripes depending on the signal, after connecting the sound is only on HDMI 2.
    I heated the BGA on the main, I check the circuits for which I find schematics, and now I found that the lack of 3.3v on t_con, the second 12v is correct, it looks like the logic has no 3.3v voltage.

    BN91-102 power supply no voltage on T_con TV Toshiba 39L4333 DG
    main 32L4300 rev 1.02A BTC-202A
    T_con integrated with AOU matrix T390HVN01 .0
    Opis techn...asheet.pdf Download (803.69 kB)

    He is looking for a scheme for the whole.
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    #2 15394513
    lisek
    Service technician RTV
    For now, there is no SM available
    On Main (32L4300 Rev1.02A.) They should be
    The IC100 MSD8841CV-W9N * BGA processor costs about $ 160 in China
    sound: IC370 -TAS5708
    HDMI: IC670 - SiI1292CNUC
    TDSS-G231d tuner
    IC760: MSB1233C LQFP48
    SPI FLASH: IC122 25Q16 WINBOND
    SERIAL EEPROM: IC121 24C256

    no voltage on T_con TV Toshiba 39L4333 DG
    From this forum Link
    This is a model from the middle of 2014. and in service mode: menu 9527
    There on Main there are some DC-DC stabilizers and converters (MM1851F, TCV7103AF, ...)
    You will find them here Link_ S-1172 Series

    ps

    Look for other subtitles on the PSU
    * this BN91-102 is bad

    Something "Chinese" style, for example: Model UE-3121-01UN-LF
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  • #3 15394798
    lisek
    Service technician RTV
    On this matrix, on the T-con plate, there should be:
    - LVDS AUO M106-11 controller (AUO-12306)
    - AUO P301-40 system
    and he (P301-) with V12IN1 + 12.6V does + 3.3V: V3D3 + 3.3V / * and VGH
    * that's it from a colleague from work
    + 3.3V (pin 13-14-17) .. then, probably, the stabilizer is made for a voltage. power supply of the AUO-12306 controller, values + 1.2V


    no voltage on T_con TV Toshiba 39L4333 DG

    Found: AUO P301-30, AUO P301-25, AUO P301-40

    There is AUO-P301-30 on the T315xw06 v.3 matrix integrated with T-con
    no voltage on T_con TV Toshiba 39L4333 DG

    Link
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  • #4 15397287
    ratel
    Level 11  
    t_con Everything looks like this for me no voltage on T_con TV Toshiba 39L4333 DG no voltage on T_con TV Toshiba 39L4333 DG no voltage on T_con TV Toshiba 39L4333 DG no voltage on T_con TV Toshiba 39L4333 DG no voltage on T_con TV Toshiba 39L4333 DG no voltage on T_con TV Toshiba 39L4333 DG no voltage on T_con TV Toshiba 39L4333 DG

    I replaced the AUO M106-28 in the QFN housing and the voltage returned on the VSS foot, the matrix responds to the signal, previously it did not respond, but still no image.
    I will check my friend's suggestions at the weekend, but now I think that I am close to the solution, because earlier I blamed Main for the lack of 3.3v voltage.

    With the AUO M106-28 chip
    _ points
    VCCE 2.9V
    VGL 11.2V
    YV1C1 0.4v
    YCLK1 1.9V
    YD101 3.1V

    with the AUO P301-30 system on the 13 * leg 3.2V at 14 * 3.2V and 17 * 1.2V
    _points
    AVDD1 15.2V
    V3D3 3.2V
    VGH 27.7V
    V1D2 1.1V
    VCOM 7V
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    #5 15423400
    lisek
    Service technician RTV
    Col sent me, but I forgot in the blast of classes
    Apparently it's sucked ... and there may be "mistakes" as, that's done by hand
    Look and compare / * maybe you will draw something

    no voltage on T_con TV Toshiba 39L4333 DG
  • #6 15424327
    ratel
    Level 11  
    I recorded a video https://youtu.be/UrYy96n5mIU as it behaves now, it flashes in the middle, it is a change to connecting the hdmi cable, as I mentioned earlier, there is only a report on hdmi _2 and I am sure that I do not have main, because of the lack of time everything I did not check it in turn.

    I had the opportunity to see this handwritten diagram before, all the tensions seem correct, I will look for the differences and write down what I have established. Thank you.
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