Question about Samsung HP-R5052 50 in. Plasma HDTV

3 Answers

I have sound and no video. I can control everything. I checked voltages but its saying either main smps or main board. how can I determine which one it is. The fan on the main board does not turn on at all. please help

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  • 9 more comments 
  • Ahmose Avin
    Ahmose Avin May 19, 2011

    ok so if you check no video but audio error. it says to disconnect connector cn809 and if you get incorrect voltages which I do its the main smps. but if you check no video error it says to check connector cn1001 and test pin 2, if you get correct voltages then replace main board. So which one should I go with.

  • Ahmose Avin
    Ahmose Avin May 19, 2011

    if I test voltages with connector cn809 connected I get all the proper readings. Does that mean its definitely the main input board.

  • Ahmose Avin
    Ahmose Avin May 19, 2011

    ok so if I do step one on that page I get no readings after removing cn809 cable. if I do step two I get all the proper readings. So what is that telling me. Is it power or y and x boards.

  • Ahmose Avin
    Ahmose Avin May 19, 2011

    ok so what board should I replace from my comments above...

  • Ahmose Avin
    Ahmose Avin May 19, 2011

    will this fix my problem. everyone else is telling me to replace the y and x boards or the main board. please help.

  • Ahmose Avin
    Ahmose Avin May 21, 2011

    Hi, ok so I just ordered the power board. I really hope this fixes my issues. I really don't have a lot of money to throw away.

  • Ahmose Avin
    Ahmose Avin May 21, 2011

    I apologize. I was being impatient and wanted a question sooner. The service manual says to replace the main power board. it says if I don't get proper voltages after disconnecting the cn809 cable the problem is the power board. Is that correct. If not why does the manual tell you to replace the power board if its also the y and x boards or could be.

  • Ahmose Avin
    Ahmose Avin May 21, 2011

    do you think its accurate from your experience. Am I just wasting money. What do you think.

  • Ahmose Avin
    Ahmose Avin May 21, 2011

    ok thanks for all of your help. I have been working on TV's for a couple of years now but never came across one like this. This one has a lot more boards then I'm use to. I will keep you updated.

  • Ahmose Avin
    Ahmose Avin May 21, 2011

    ok so how do I test the Y boards and or the X boards. Please let me know.

  • Ahmose Avin
    Ahmose Avin May 21, 2011

    wow. I thought that this was a professional site and would have help but its cool. You don't have to help me. I was expecting professionalism but guess I won't get that from you. You are right I did pass it on because I needed a faster response. Thanks for your help.

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3 Answers

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  • Samsung Master
  • 2,098 Answers

Hi,
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

  • 1 more comment 
  • Jdvillanueva
    Jdvillanueva May 21, 2011

    If you are going to check the chart, X and Y board malfunction is not the same reading as what the power supply board was faulty. As you can see you must proved first that the power supply board is good through step 1. Step 2 will reveal the fault between the DC-DC board and x,y boards just by following the procedure.

  • Jdvillanueva
    Jdvillanueva May 21, 2011

    Lets wait for the power supply board, this will reveal if the service manual is accurate or not.

  • Jdvillanueva
    Jdvillanueva May 21, 2011

    based on my experienced service manual is quite reliable in terms of "error code" and diagnosing the error codes, even sometimes the service manual is not a 100% accurate but this is in labeling of some parts and in the schematic error.



    However diagnosing the error codes depend upon the people working on it (technician/DIY customers), if wrong impression and checking the test point, of course you will mislead.



    Based on your measurements, I'm pretty comfortable that you are in the right track...

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  • Samsung Master
  • 74,136 Answers

Hello
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

  • The Knight
    The Knight May 19, 2011

    The power inverter board itsef. It can be purchased from Samsung service center. Insist on original one. Never go before substitutions.

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  • Samsung Master
  • 19,396 Answers

Hi.

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.

Regards.

Ginko

Posted on May 19, 2011

  • 5 more comments 
  • Ginko
    Ginko May 19, 2011

    Hi.



    No, you still need to check Y and X drive boards and Y buffer. If any of them is shorted you get sound with no video.
    Please refer to page 43, 6-4 in the service manual.

    If Y and X drives are Ok and if Y buffer is OK, go for the main.

    Regards.

    Ginko

  • Ginko
    Ginko May 19, 2011

    Hi.

    Thanks for the bad feedback. Very kind of you.

    Enjoy the free service manual and enjoy my time.

    Goodbye and good luck with the next expert.

    Ginko

  • Ginko
    Ginko May 20, 2011

    I see that your question keeps bouncing back.

    You need to test Ysus, Xsus and Y drive for shorts, then you test main. Everybody else is telling Ysus and Xsus because that is a common fault. I gave you service manual with instructions to test.
    Alternatively you can take the risk and replace the whole kit of boards.

    With the job half done you have passed the question to other experts. Next time please stick with the expert that is following you. Once the question gets passed the expert that spent time following you gets excluded, and new experts may found difficult to pick up.

    I am sorry, but you chose to pass the problem. Use the manual I gave you.

    Bye.

  • Ginko
    Ginko May 21, 2011

    The test in the service manual is accurate. As a matter of principle there is always a little margin of error. That is the reason why as technician we cover ours back by charging a bit more on repair quote.

    About the test, as I said shorted drive boards or Y buffer can result in wrong voltage from main. Testing those boards will help to reduce further the chance of error.

  • Ginko
    Ginko May 21, 2011

    Hi.

    I will answer because I think you are addressing my last comment.
    You have refused my help passing the question to other expert. I gave some tip after refusal, you cannot blame me if I won't go in detail on the step-by-step. I am not in charge of the problem anymore.

    I am sure that some of the other experts will guide you.

    Good luck.

    G.

  • Ginko
    Ginko May 21, 2011

    Hi.

    No problem, it is not a matter of professionalism. you chose to pass to someone else. Once you pass to a different expert the old expert gets a bad feedback and has no chance to score the answer (no good feedback, no reward) while the new expert takes charge and eventually take a change to earn the reward. That is the way it works. You are still entitled to get help from the new expert that took charge.

    I hope this will help to understand Fixya system.

    Bye.

  • Ginko
    Ginko Jun 01, 2011

    Re:"You don't have to help me. I was expecting professionalism but guess I won't get that from you. You are right I did pass it on because I needed a faster response. Thanks for your help. "

    Well. It is not me being unprofessional. You decided to give me bad feedback and you have payed a different expert because you wanted "a faster response"....kicking me out with bad feedback was your decision, you cannot blame me for not assisting you.

    Goodbye

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