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LOGIK LCXW32HD1 TV TV had total failure took for repair told that the power supply was us and that parts are no longer available

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  • Anonymous Oct 11, 2008

    i have had exactly the same problem

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I have had 3 of these sets, all with blown '+5V Standby' circuits. The culprit was the 8-pin DIL FSD200 controller chip. When it blows it takes out the little optocoupler, the small SM bridge rectifier (PCB underside) and the 20mm fuse. The FSD200 is hard to source, but Digi-Key have plenty at £0.88 each. They also sell replacement bridges, fuses and optocouplers. If you attempt the repair I recommend that you fit sockets for the controller and optocoupler. If you fit the opto round the wrong way the +5V Standby rail will try to rise to over 10V and the set's control logic may be damaged. Good luck.

Posted on Dec 18, 2008

  • ray austin
    ray austin Jul 20, 2015

    Hi, never attempted to fix a TV, but this answer is good. What are the part numbers I would need off Digi-key, on there site and can't find the optocoupler and small bridge part numbers. Any help would be great.

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I am looking for a t4 standby transformer for one of these sets.

Posted on Dec 01, 2013

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Logik lcxw32hd1 power blown on standby...


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These power supplies are complicated to work on. There are some preprietory parts that you would not be able to genericaly puarchase from general electronic parts suppliers.

If you are very strong in knowledge about power supply design, and if you can have the service manuals, have a scope and a DVM, you should have a chance to figure out what the fault is.

Take care that switching power supplies can be dangerous to work on. They employ high current using high voltages on the drive side.

Normally, these power supplies are not designed to be servicable.


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