HItachi P50T01UA plasma PSU Murata MPF7722

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  • nogger
    Senior Member
    • Aug 2010
    • 190
    #1

    HItachi P50T01UA plasma PSU Murata MPF7722

    hi All, just got one of these in for repair & trying to figure out how to power this PSU up on the bench. Searched the forum but can't find anything on the PSU OR the TV.

    One connector has the following pins STB5v, GND, STB3.3, POWEROFF,AC CLOCK,POD-STBY,REC-STBY. The STBY5v & STBY3.3 are present & correct.
    A second connector has : Vcc5.1,GND,STBY3.3,VCEG0,VSAG0

    triedthe usual tricks STBY to GNDetc but nothing clicks. There's no PS_ON as far as i can see just the POWEROFF.

    Before i go experimenting thought i would ask on here. As usual no circuit info in the manual.

    Cheers
    Graham
    Tags: None
    • steviewonder
      Senior Member
      • Dec 2013
      • 183
      • england
      #2
      Re: HItachi P50T01UA plasma PSU Murata MPF7722

      Yes,not come across one of those psu's so far.i would assume poweroff is the same as p-on?

        Comment

        • nogger
          Senior Member
          • Aug 2010
          • 190
          #3
          Re: HItachi P50T01UA plasma PSU Murata MPF7722

          That's what i thought but seem's not, tried all combinations but doesn't switch it on. Have to see if i can find a manual.

          Graham

            Comment

            • fzabkar
              Badcaps Veteran
              • Mar 2009
              • 772
              • Australia
              #4
              Re: HItachi P50T01UA plasma PSU Murata MPF7722

              The Hitachi DW3-A chassis pinout for CN63 is ...

              1 STBY+5V -->
              2 GND
              3 STBY+3.3V -->
              4 Power Off --> only high momentarily when AC removed
              5 AC Clock -->
              6 Power1 <--
              7 Power2 <--
              8 NC

              Therefore ISTM that 6 and 7 could be the power control pins.

                Comment

                • nogger
                  Senior Member
                  • Aug 2010
                  • 190
                  #5
                  Re: HItachi P50T01UA plasma PSU Murata MPF7722

                  Haven't had a chance to test this yet, will have a go tomorrow & let you know.

                  Graham

                    Comment

                    • fzabkar
                      Badcaps Veteran
                      • Mar 2009
                      • 772
                      • Australia
                      #6
                      Re: HItachi P50T01UA plasma PSU Murata MPF7722

                      Electrotanya has several service manuals for the DW3-A chassis. Perhaps one is more complete that the others.

                        Comment

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