Question about Sharp LC-26SB14U 26 in. LCD TV

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Sharp LC-26SB14U 26 in. LCD TV Problems & Solutions I replaced a fuse 6.3 Amp 125 V and plugged in power cord. A capcitor near the fuse overheated (fried) and I quickly unplugged the cord. The fuse also blew again.

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  • Ray Johnson Dec 28, 2010

    Since the capacitor is fried, it obviously needs replacement. My concern is why it melted to begin with. If I replace it, it seems like it would just melt again when power is applied.

  • Ray Johnson Dec 29, 2010

    OK. I will try that. Thank you.

  • Ray Johnson Dec 29, 2010

    You are right, I believe the capacitor burst. It is next in the circuit following the power fuse. The circuit diagram shows it as 275V 0.22 ECQUL.

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  • Sharp Master
  • 73,644 Answers

Hello
There is some leaky mains rectifier diodes on the circuit. Before switching it on, replace all the four mains rectifier idiodes, or a rectifier stack, whatever it may be. Replace the mains filter capacitor that has bulged also' It may have got damaged. Check all the related components on the power regulator section and replace the suspected. Do these things, and inform me the progress. Feel free to contact me through Fixya. Ok.

Posted on Dec 29, 2010

  • The Knight
    The Knight Dec 29, 2010

    Hello
    You are disussing about the main filter capacitor I thinks. Or specify which capaictor does melts in your TV as you switched it ON. If it is main filter capacitor, it will be a little bulky one, which does not melt, it will burst off instead. Please speicy the position of that capacitor to me. Go to its circuit keenly, and try to find its poition on which it is fitted in the power regulator syste. Please give me more details as it will help me to asist you properly. OK

  • The Knight
    The Knight Dec 29, 2010

    Hello
    It is [ 0.22Mfd 275VAC] capacitor, polyster or polystrene type, which will look like a small chocolate. It is rated to AC [Alternating Current], and not to DC [Direct Current}. When replacing it should be the same. The set will work well eventhough it is not there. It is used there as an external voltage surge protection, and as a voltage booster for the choke coil fitted next to it. Anyway replace it with same type. OK.

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  • Master
  • 2,385 Answers

Hello
The capacitor also need to be changed, hope it will solve the issue, if problem persists the move ahead for further diagnostic.
Good Luck

Posted on Dec 28, 2010

  • Computer Links Dec 29, 2010

    hello
    It is nor quite sure that the capacitor will melt again, because when capacitor gone weak then it give such kind of problem, it is more than 80% chances it will be ok after change of capacitor.
    good luck

  • Computer Links Dec 30, 2010

    Hello
    if the solution gives you help, then why you rejected it, not even the solution rating, at least appreciate my effort.
    Regards

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