Technika lcd tv

Discussion in 'General Electronics Chat' started by spike47, Aug 14, 2009.

  1. spike47

    Thread Starter Member

    Mar 11, 2009
    22
    0
    Hi

    I have a problem with a 19" Technika lcd tv , when it is swiched on all that happens is the red standby light is going on and of , and a small ceramic capacitor is clicking away , I have a sort of schematic and photo of the area of the pcb in question , I have removed one of the 2 shottky rectifiers for testing and It showed to be faulty , I have ordered a new one , but when I switch on the board the small cap is still clicking away , could this be a fault with the cap , ( 103 1kv ) I am not sure how to test it and if it has to be removed to test .

    any help on this will be highly appreciated.
     
  2. bertus

    Administrator

    Apr 5, 2008
    15,647
    2,346
  3. spike47

    Thread Starter Member

    Mar 11, 2009
    22
    0
    Hi

    The first post was about the capacitor , I have posted a new post with the whole story sort of.

    cheers

    spike
     
  4. bertus

    Administrator

    Apr 5, 2008
    15,647
    2,346
    Hello,

    Sorry to me it looked very the same.

    The clicking could be sparking.
    The capacitor probably can not hold the voltage any more.

    I found 10nF 1kV capacitors at digikey:
    One with very large tolerance - 20 % / + 80 % for 0.26 Euro
    http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=490-4240-ND
    And a capacitor from panasonic with ± 10 % tolerance, but sold at bundles of 10 for 7.74 Euro.
    http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=P9552-ND

    Greetings,
    Bertus
     
  5. spike47

    Thread Starter Member

    Mar 11, 2009
    22
    0
    Hi

    Bertus

    Thanks for all your help and the web links .

    regards

    spike
     
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