Question about Samsung HC-P4752W 47" Rear Projection HDTV-Ready Television

2 Answers

It turn off itself.

I changed the two STK392-010 ICs. The TV started working very well, but now it has developed another problem: it turns off itself. Whenever that happens, I have to unplug it from power and replug it again before the TV canm be turned on. Sometimes I have to wait for even 30 minutes or more before it accepts power. What is the problem? is it still related to the convergence? But it had been doing fine for the whole day since changing those ICs.

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  • Mzee Mzima Jun 29, 2007

    After replacing the ICs, the convergence was very good. It worked very well for the whole day and even for half of the nmext day before the problem started. Currently it does not start at all. I have unpulgged it for about one hour now and it is still not truning ON.

    I will check the high voltage connectors.

  • Mzee Mzima Jun 29, 2007

    Is it possible that the Hi Voltage transformder is dead?

  • Mzee Mzima Jun 30, 2007

    Chacked all connections, they are OK. I have noted that the it does not respond to the manual push button although it seems to respond to the remote controller keys.

  • Mzee Mzima Jul 06, 2007

    Leslake,

    I used silicone thermal material. I am not sure whether I cleaned it to avoid contacting the IC terminals but I guess this material does not conduct electricity.

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How does the Blue look, alot of Samsung CRT Projos have bad/ leaky blue crts and it may have leaked and caused a short, check for fluid on circuit boards below, and beware! This "coolant" can possibly be a fire hazard.

Posted on Jul 04, 2007

  • les lake Jul 04, 2007

    Also did you put some heatsink dope on the backs of the IC's before reinstalling them and also clean up the old dope? If you didnt you could have shorted the new IC's and need new ones.

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After you replace the ic's how was the convergence? bad or ,almost good if . you had it to do a deep alignmet may you still have problems in the same circuit area.

Posted on Jun 29, 2007

  • Luis Amado Jun 29, 2007

    Be sure that all the Hi voltage connectors are all the way in. could'be arching

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http://servicemanuals.vstore.ca/

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