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#Chinatv

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  • čas přidán 17. 09. 2019
  • CHINA TV 17"NORMAL PCB
    MAIN IC 8895CSNG 7GG9
    EHT BSC25-T1010A (T1719A)
    VERTICAL IC LA78040
    SOUND IC TDA2003
    TRANSISTOR POWER SUPPLY
    HORIZONTAL LINE
    1.Power on/Measure vertical IC voltage----not ok.
    2.Power off/Open main ic vertical drive resister (pin 16).
    3.Power on/Touch of resister one point by tweezers-----H LINE spread top to bottom-----that means vertical IC ok.
    4.Check +5V(pin 36 of main IC)----ok.
    5.Check +8V (pin17 of main IC)---ok.
    6.Check vertical drive voltage---low.
    7.Check voltage pin15 of main IC----missing.
    8.Power off/Open capacitor C216(104J) pin15 of main IC.
    9.Measure capacitor----shows--value low.
    10.Set new capacitor.
    11.Then-----

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