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orion tv32rn10 lcd tv

 
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blackbox4498



Joined: 26 Nov 2011
Posts: 1

PostPosted: Mon Nov 28, 2011 7:26 pm    Post subject: orion tv32rn10 lcd tv Reply with quote

tv dead no stand by light.237v going in fuse ok.no volts going across main cap its 300uf cap reads 287uf.checked bridge rectifer ok.reads 5v at stand by.not sure where to check next any assistane would be much appricated thanks.anyone know where i can get circuit diagram the power supply board is cef286a.
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Pentode



Joined: 30 Oct 2007
Posts: 85
Location: Nr. Manchester (UK)

PostPosted: Fri Dec 16, 2011 9:01 pm    Post subject: Reply with quote

There should be voltage across the main smoothing capacitor ac input times 1.414, so if you have 120v ac then 120 x 1.414 = 169, almost 170V dc across the capacitor.... note I just plucked the 120 out of thin air, but you can see how its calculated.

There will be internal fuses and maybe a fusible resistor, resistors that acts as fuses, so a meter and cold checking from the input to the rectifiers is a good start as a first step.

But having said all that, you just might have a system that uses a standby power supply, and switches a rely to turn the main power supply ON, you need to determine which system you have since I don't know the model at hand.

Dave
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