Sansui SV-EPD-42Q0BP +VS short on Zsustain chip

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  • Grunder
    Badcaps Veteran
    • Jan 2016
    • 323
    • south africa
    #1

    Sansui SV-EPD-42Q0BP +VS short on Zsustain chip

    Hi Guys,

    I have a faulty Sansui SV-EPD-42Q0BP plasma television that is faulty.

    Symptom: very dim column of broken picture on right hand side. A column about an eighth of the screen width. the other 7/8 of the screen blank.

    Diagnosed: 1) Capacitors C96 & C100 both 47uf/250v swollen/ ruptured.
    2) Fuse FS152 4A Open circuit.
    3) Pin +VS on Hybrid ic measures 0.8 ohms to Gnd.
    (this is with the pin de-soldered from the pcb.
    4) D96 & D85 on the +VS supply measure ok.

    Question : Could the capacitors have swollen and ruptured due to wear & tear causing the failure of the hybrid ic ?
    or is an over voltage scenario responsible for damaging both the capacitors and the Hybrid ic.

    The television had failed on switch-on after a heavy storm & power outage. a programmable coffee machine on the same mains line has also malfunctioned.

    Is there a chance that a mains surge could have caused the damage?

    Photos: Top & bottom of pcb. Swollen caps

    Please, any input will help.
    Attached Files
    Tags: None
    • Grunder
      Badcaps Veteran
      • Jan 2016
      • 323
      • south africa
      #2
      Re: Sansui SV-EPD-42Q0BP +VS short on Zsustain chip

      more damage found/ Going with surge damage-Ta-Bra Mike

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