Question about Philips 27PT543S 27" TV

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Hi I have a problem with my philips crt tv...can u assist me? It is a 2003 TV set and just powers off after every 5 minutes... it starts off normally but all of a sudden it shuts down... I need to start it again, it plays for another 5 mins and again shuts down...

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Can you solve this problem? please refer your correct model number of your set, Normally few faults are find out with the problem of opto coupler and LOT. If any one of the cathode is not in correct drive set will shut off

Posted on Jun 20, 2010

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Sounds similar to a problem I had , haveing bought and install components to repair/upgrade the power supply I still had the same problem. I solved the problem by adjusting the LOPT line output transformer be carefull of the high voltages even when powered down, the lopt has one adjustment just turn it as little as possible, power up and see it solves your problem, I'm not sure in which direction but try anti clockwise first. Mind only needed the smallest of adjustments. Make a note of where it is before you make any adjustments. My TV been as good as gold for a couple of years now

Posted on May 07, 2010

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WHEN TV TURN OFF SCREEN LIGHT SHOWS SKY CLOUDS BACK GROUND COLOR WHY


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1. Light(s) on the front panel are behaving not normal example, blinking, amber color or
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3. TV turns OFF by itself.
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I repair these power supplies. Write to jah2mil@hotmail.com if you require further assistance.

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Not sure what you mean by "older", but I assume it's a CRT display. It takes some time for a picture tube to come up from a completely cold start. It has to get all of those electrons hot enough to start flying around, and also build up a high voltage on the screen. You don't notice it in normal operation because the power button doesn't really turn everything off, but just puts the set in standby mode. Unplugging, though, lets everything cool off completely.

If you're talking real antiques, with tube-type amplifiers, then the warmup time could be even longer. I remember as a kid watching the blank screen for a couple of minutes before a picture appeared.

What you describe sounds like normal behavior for a CRT television. Not sure what's up with that flickering red light, though.

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2 Answers

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Well you did start out good, thats cool, now we have to define focus, Is ir blurry around the edges as well as the whole Picture? If it is, it could be the picture tube, A bad solder connection on the tube socket, and yes it could also be the flyback transformer.

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