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    #1

    panasonic tc-50pu54 no picture ligh blinks 8 times

    I have 50 inch plasma Panasonic that has the 8 blink trouble . I have been reading all the threads listed on site and also checked and replaced most of the parts I read about. No luck. Just to let you know a little history. It had a shorted Q051 tr shorted dg302 which I replaced. I discovered that if I removed ss33 ribbon connector I would get sound and a faint display in left front top corner. As soon as you hooked back s33 connector you get 8 blinks. After all my checking I discovered that on SS57 connector that goes to display does not have any continunity from pins 1&2 as all the other connectors going to panel. Pin 1 on these connectors go to green resistors at end of ss board. pin 13 also don't show any reading like the others on this connector. This doesn't seem right to me so my question is am I right or not? Could this cause the 8 blinks? If it is how could loose screws and shorted transistor cause bad connector to panel. Help -Am I overlooking something?
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    #2
    Re: panasonic tc-50pu54 no picture ligh blinks 8 times

    There are 2 ss boards for your tv. What is the one in yours? Post pics of each board and the whole back of the tv.
    Last edited by tvtimmy; 07-25-2017, 05:32 PM. Reason: Drinking beer, mixed up threads.

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      #3
      Re: panasonic tc-50pu54 no picture ligh blinks 8 times

      sorry-this set has just one ss panel and one sc panel.

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        #4
        Re: panasonic tc-50pu54 no picture ligh blinks 8 times

        Originally posted by tvtanner View Post
        sorry-this set has just one ss panel and one sc panel.
        Oh dear. He means 2 versions that are used in production. WHich one is yours? Photos? Part number and revision?

        Sounds like the SS is still faulty, were all these checked or replaced?
        Bad driver IC?
        Q16051:
        • D16041:
        • R16051:

        TXNSS1SDUU (TNPA5623AB)
        Last edited by tw2005; 07-26-2017, 01:55 AM.

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          #5
          Re: panasonic tc-50pu54 no picture ligh blinks 8 times

          yes those were all replaced. part no. is tnp5623ab. ss panel. What I would really like to know has anyone ever measured res. of the ribbon cables going from ss panel to display panel pin 1 to pin 2. they all read the same except one I mention above. my camera is lost at moment but panel can be observed by pulling up thread by model no. on this site. thanks for info.

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            #6
            Re: panasonic tc-50pu54 no picture ligh blinks 8 times

            Originally posted by tvtanner View Post
            yes those were all replaced. part no. is tnp5623ab. ss panel. What I would really like to know has anyone ever measured res. of the ribbon cables going from ss panel to display panel pin 1 to pin 2. they all read the same except one I mention above. my camera is lost at moment but panel can be observed by pulling up thread by model no. on this site. thanks for info.
            This is normal. There are pins on the cable which are used as part of the "FPC detect" system.

            Since it is possible to run the set with just one FPC cable connected (picture is fine), the FPC detect will shut down if not all cables are detected as being connected. The reasoning is that just one cable will overheat if it is used without others connected, so all cables must be connected simultaneously.

            Only Panasonic has this system. Other set manufacturers don't, and I've seen pictures of a melted Z-sustain connector on a set which had one ribbon installed incorrectly, so it appears, at least in principle, to be a sensible idea.
            Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
            For service manual, schematic, boardview (board view), datasheet, cad - use our search.

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              #7
              Re: panasonic tc-50pu54 no picture ligh blinks 8 times

              Thanks TOM- That's the good news I wanted to hear. I will be still looking further. Thanks again. Sam

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                #8
                Re: panasonic tc-50pu54 no picture ligh blinks 8 times

                Back again. This set is driving me crazy. I think i'm going to need schematic to go further. Does anyone have one or know where one could be found? I found a flow chart and it said all the connectors going to panel from ss panel has to have connection between pins 1&2. I have connection on all but ss57. Number 1 on all connectors go to some sort of detect ckt. so i'm assuming this could be my problem. I traced out cable and it looks good. Did anyone else have this problem?

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