LG LST-5100P - quick repair

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  • japlytic
    Badcaps Legend
    • Oct 2005
    • 2086
    • Australia
    #1

    LG LST-5100P - quick repair

    Today, I managed to quickly fix an LG LST-5100P STB .

    Measuring the supply rail before the two 5V regulators had shown it was way down, just like in a Teac DV-B300, and was caused by C116 (LG) losing its capacitance without bulging (the same happened with C6 in the Teac).

    Replacing all of the electrolytic capacitors except for the Daewoo/Partsnic RSM Series units (after the linear regulators - the 400V unit was also good, along with the Samyoung SRA/GSS series unit) fixed this STB.

    C116 (before inductor connected to +5V regulators) and C118 (before inductor connected to +5V regulators) were Samyoung KME (general-purpose) units, of which they were not designed for high frequency use .
    My first choice in quality Japanese electrolytics is Nippon Chemi-Con, which has been in business since 1931... the quality of electronics is dependent on the quality of the electrolytics.
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