Hitachi P50S602 Plasma Power Supply Testing?

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • Robb
    Senior Member
    • Sep 2013
    • 159
    • USA

    #1

    Hitachi P50S602 Plasma Power Supply Testing?

    Does anyone know how to test a power supply? My TV turns on then back off again within a few seconds. I don't think it's the Y-SUS as it produces a picture before it shuts down and disconnecting the Y-SUS and X-SUS doesn't allow TV to stay on. Any suggestions will be greatly appreciated, there seems to an internet blackout on this issue.
  • tom66
    EVs Rule
    • Apr 2011
    • 32560
    • UK

    #2
    Re: Hitachi P50S602 Plasma Power Supply Testing?

    Do you see a PS-ON, RL-ON and/or VS-ON labelled pin on connectors on power supply board?
    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.

    Comment

    • Robb
      Senior Member
      • Sep 2013
      • 159
      • USA

      #3
      Re: Hitachi P50S602 Plasma Power Supply Testing?

      No, other than the power in, the connectors are CN23, CNPPS & CN06, as follows:

      (from top to bottom)
      CN23 - Va, Va, NC, Vcc5.1V, GND, GND, GND, NC, Vs, Vs

      CNPPS - AUDIO 17V, AUDIO GND, +17V, GND, +5.6V, +5.6V, GND, GND, STBY5V, GND, AC CLOCK, POWER1, POWER2, AC OFF, NC

      CN06 - Vcc1.5C, GND, Vra, Vrs, Vcego, Vsago, AC OFF
      Attached Files

      Comment

      • tom66
        EVs Rule
        • Apr 2011
        • 32560
        • UK

        #4
        Re: Hitachi P50S602 Plasma Power Supply Testing?

        OK, I think the signals are POWER1, POWER2, Vsago, Vcego.
        You want to have the power supply connected and power the set up, check the various voltages on these pins, and see how they change when the power button is pressed. If they drop out, then the power board is probably OK and the main board is shutting down.
        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.

        Comment

        • Robb
          Senior Member
          • Sep 2013
          • 159
          • USA

          #5
          Re: Hitachi P50S602 Plasma Power Supply Testing?

          When I press the power button, the connections go from 0V to as follows:

          POWER1 - 4.3V even after fans stop (shuts itself off) MAIN
          POWER2 - 3.2V even after fans stop (shuts itself off) MAIN
          Vcego - 3.0V until fans stop then 0V LOGIC
          Vsago - 3.0V until fans start then 0V LOGIC

          I could not read the connections from the PSU Board so I read them from the MAIN & LOGIC Boards.
          Last edited by Robb; 09-30-2013, 02:49 PM.

          Comment

          • tom66
            EVs Rule
            • Apr 2011
            • 32560
            • UK

            #6
            Re: Hitachi P50S602 Plasma Power Supply Testing?

            OK, this indicates the logic is shutting off the power, which is likely because it detects a fault on either YSUS or XSUS board.
            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.

            Comment

            • Robb
              Senior Member
              • Sep 2013
              • 159
              • USA

              #7
              Re: Hitachi P50S602 Plasma Power Supply Testing?

              So, if the YSUS or XSUS is faulty, the display can still work briefly (black background with multicolored pixel static/snow).

              I have disconnected the cables between PSU & XSUS and then XSUS & YSUS, but it still won't stay powered on. I also disconnected the Y-Buffers and same thing. Not sure how to locate the source of the problem.

              Comment

              • tom66
                EVs Rule
                • Apr 2011
                • 32560
                • UK

                #8
                Re: Hitachi P50S602 Plasma Power Supply Testing?

                I have no experience with Hitachi plasmas, but pink snow makes me thing more of a YSUS than XSUS, if that helps...
                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.

                Comment

                • Robb
                  Senior Member
                  • Sep 2013
                  • 159
                  • USA

                  #9
                  Re: Hitachi P50S602 Plasma Power Supply Testing?

                  Thanks for helping me rule out the PSU! You are the best!

                  Comment

                  Related Topics

                  Collapse

                  • Tynan Dill
                    Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?
                    by Tynan Dill
                    I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.

                    Upon bringing it home and plugging it up, it showed a standby light.

                    I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.

                    The screen seems to blackout and stay black, but with a flashlight I can see the display.

                    With my Playstation 4 connected via HDMI, and running a game I can hear sound.

                    Assuming...
                    11-22-2024, 01:46 PM
                  • lp20th
                    Samsung Plasma TV Power Supply Issue
                    by lp20th
                    I have a vintage 2008 Samsung 50” Plasma TV, Model code PN50A550S1FXZA with a power supply part number BN44-00222A. I repaired the power supply board several years ago finding a couple of cold solder joints on the back side of the board and it's worked great up until now. Recently a fried sound occurred with the smell of burnt electronics and the TV shut down. Trying to turn it back on yielded the typical relay clicking with no TV boot up. Upon investigation, removing feeds to the other boards within the TV it was found that disconnecting the logic board from the power supply allowed the...
                    11-28-2023, 10:28 AM
                  • navagator
                    Hitachi Power Supply Unit Interchangeability
                    by navagator
                    I have a Hitachi 57F710E rear projection set with a bad power supply board. I've tried to fix it with help from this forum as well as another one, but without success. Today I found a Hitachi rear projection set for sale on Facebook that looked just like mine. After contacting the seller I found out it was a 51F510. According to the service manuals my set uses a HA01312, POWER UNIT DP4X-DM_24W and the 51F510 uses a HA01313, U901, POWER UNIT DP4X_24W.

                    Does anyone know if these 2 power supply boards are interchangeable?

                    Thanks.
                    01-08-2024, 07:53 PM
                  • sam_sam_sam
                    Modification to a ZD-987 desoldering/soldering station using a external switching power supply
                    by sam_sam_sam
                    I have been working on this concept for quite some time now with limited success but recently I found a switching power supply that is setup for the voltage that this soldering station needs to operate at however it also needs part of the secondary circuit from the original switching power because you need several voltage rails

                    I once tried to get a ZD-915 desoldering station to work on a 18 volt battery power supply but unfortunately things did not go well but I did find a work around but I might try this idea again but going at a little differently more about this another time...
                    07-01-2024, 06:34 AM
                  • repair-it
                    Need advice testing a samsung power supply board with scope
                    by repair-it
                    I am attempting to test a samsung power supply board to verify the pfc ic is working. I am powering up the board with my isolation transformer. The board turns on fine but when I attempt to connect the ground for the scope probe, it trips out the isolator. I was taught not to 'float my scope' so I am wondering if I should test without connecting the ground lead or would that be asking for trouble? Not sure how else to test, I don't have a portable scope. I could plug direct to mains power but that would bypass the safety factor.
                    07-12-2025, 11:00 AM
                  • Loading...
                  • No more items.
                  Working...