Identifying IC & troubleshooting TP.MS3463S.PB782

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  • Trofazni
    Senior Member
    • Dec 2016
    • 71
    • Serbia
    #1

    Identifying IC & troubleshooting TP.MS3463S.PB782

    I have trouble with this psu, l'm suspecting pwm ic is the problem, but i can not find it's datasheet, or anything. The picture is from service manual of tp.ms3463s.pb801, mine board is pb782, l'm guessing it's similar, if not exact as mine.. So what is UB101?
    Attached Files
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    • sam_sam_sam
      Badcaps Legend
      • Jul 2011
      • 6025
      • USA
      #2
      Re: Identifying IC & troubleshooting TP.MS3463S.PB782

      Here is what I found

      https://www.yoycart.com/Product/534309773654/

      But could not find the data sheet for it

      It might not be what you are looking for I do not know
      Last edited by sam_sam_sam; 06-13-2019, 06:23 PM.

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        • R_J
          Badcaps Legend
          • Jun 2012
          • 9520
          • Canada
          #3
          Re: Identifying IC & troubleshooting TP.MS3463S.PB782

          It looks like a LD7536RM, I think I found the correct one.
          Attached Files
          Last edited by R_J; 06-13-2019, 07:51 PM.

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            • Trofazni
              Senior Member
              • Dec 2016
              • 71
              • Serbia
              #4
              Re: Identifying IC & troubleshooting TP.MS3463S.PB782

              Originally posted by R_J
              It looks like a LD7536RM, I think I found the correct one.
              I too do not know if it's that one, but l found simmilar 0cl 308 b4 marking, and gave it a try, of course when i removed old one that was fried, indeed, measuring on green picture.
              Replaced it, 15V was not steady, no stb power or 12V rail.. Changed optocoupler, and diode on secondary side of optocoupler, you have red cicled on pic what was changed. Anyway, it's working now, thank you for leading me to another succesfull job
              TV tuner seems to cant find any channels, i guess thunderstorm fried tuner too?
              Attached Files

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                • sam_sam_sam
                  Badcaps Legend
                  • Jul 2011
                  • 6025
                  • USA
                  #5
                  Re: Identifying IC & troubleshooting TP.MS3463S.PB782

                  Well I am glad you were able to fix it great job

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