Question about Samsung HP-R5052 50 in. Plasma HDTV
I have read your comment and I know you have a copy of the supplied service manual of your model no. On page 43 (right guide for your symptoms) stated there that proper testing of CN809 is while it is disconnected from the board. The manufacturer clarify that in the service manual to guide you in troubleshooting. They know that when you test it connected to the board, you will mislead(confused) on the reading. Note that the power supply board has own feedback circuitry design by the manufacturer not only to stabilize the output voltage of the SMPS but also to help for troubleshooting.
On page 45, CN101 pin2(33v) is a supplied voltage for the tuner circuitry. If you got the correct reading there this is not the basis that the power supply is good. This is only showed that the 33v line (from the power supply) and the main board is good proved by the sound of the unit.
Power supply has a multiple output and has own feedback circuitry, meaning that once one of the output voltage fail, considered it faulty power supply.
Best bet that you follow what the service manual stated, and based on your comment I know that the power supply is the issue here and not the other board.
I've saw your board on shopjimmy.com, you may placed your order now. I'm pretty sure that the power supply board replacement will solved your problem.
Hope I helped you.
Have a nice day!
Thanks for using Fixya.
Posted on May 20, 2011
Never attempt to repair a power board of a PLASMA TV. You can't set it right. It contains some SMD [Surface mount Devices] which cannot be replaced by normal soldering methods. Moreover, most of its components are crtical, and must be replaced with exact number replacement, which are not available at open electronic market. Samsung plasma TV power boards are assembled in China, and will have a number printed on it. Eventhough you have detected the fault, you can't get any component, especially in case of SMPS transformers on it. So it is best to replace the power board as whole, rather than making surgery to it. The main thing to be noted is, plasma displays are very very sensitive ot slight voltage varations rathat than LCD types. power supply section is the most important section in a plasma TV. So replace it as a unit. OK.
Posted on May 19, 2011
Be sure that you checked voltages in SMPS and SMPS DC/DC. Adjust voltages if necessary. There is a sticker inside the TV.
See page 24 on service manual to find out how to regulate voltages.
Test the connector to Main, and see if there is voltage getting to main at the connector.
If there is voltage at main connector, and voltages on SMPS are OK replace main.
The service manual has been uploaded here.
Posted on May 19, 2011
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Posted on Jan 02, 2017
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