Panasonic tx-p42s31b

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • tom66
    EVs Rule
    • Apr 2011
    • 32560
    • UK

    #21
    Re: Panasonic tx-p42s31b

    Panel faults won't cause shorted IGBTs... buffer ICs -maybe- but not IGBTs...
    For future ref, a 150W light-bulb in series with Vsus on these will often stop IGBTs popping badly - set will work with a distorted picture in this configuration.
    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

    • newtothis
      Badcaps Legend
      • Mar 2013
      • 1556
      • england

      #22
      Re: Panasonic tx-p42s31b

      Originally posted by tom66
      Panel faults won't cause shorted IGBTs... buffer ICs -maybe- but not IGBTs...
      For future ref, a 150W light-bulb in series with Vsus on these will often stop IGBTs popping badly - set will work with a distorted picture in this configuration.
      Righto, The Buffer IC's have no shorts so its puzzling :S It worked for around 5 seconds then it went as the panel tried to prime I think.

      Oh well I will replace what has shorted and add a light bulb to the series to see how it goes

      Comment

      • tom66
        EVs Rule
        • Apr 2011
        • 32560
        • UK

        #23
        Re: Panasonic tx-p42s31b

        I had this fault, panel primed, then shut off 6 blinks

        Although mine did not pop anything - bulb did glow dimly... but set quickly shut down

        I am guessing where I had an OPEN ER circuit (causing SOS6 from low MID voltage) you had SHORTED ER circuit, causing high load on Vsus IGBTs (in this case the bulb helps a lot)
        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

        • newtothis
          Badcaps Legend
          • Mar 2013
          • 1556
          • england

          #24
          Re: Panasonic tx-p42s31b

          Cheers Tom

          Comment

          Related Topics

          Collapse

          • jm1234
            Panasonic plasma TX-P42ST50 - 6 blinks
            by jm1234
            Hi,
            anyone able to provide the service manual for old plasma Panasonic TX-P42ST50E?
            It turns off almost immediately (0~5 seconds after pressing the on/off button) and starts flashing the red diode 6 times.
            I disconnected the left-hand side board (SC?, both the ribbon cable and the power cable to it) and also another ribbon going to bottom left board. Then the led signal is 8 flashes. According to service guide to another Panasonic plasma it would mean the left-hand side board is faulty. But I'm not sure it 100% applies to my model.
            I checked that board for any obvious faults...
            05-22-2024, 06:59 AM
          • Alicat
            Panasonic Plasma TH-50PZ85U No screen No blinks on red power light
            by Alicat
            Hello,

            Stopped by this site trying to fix my parents Panasonic Plasma TV.

            Model number is TH-50PZ85U

            Power comes on and the red power light stays on solid.

            Did a few checks like hold the power button on for 60 seconds, hold the - Volume while holding the menu button, no luck, still@ blank grey screen as the screen lights up very vague.

            I also hear a few clicks.

            I also think my parents said there was a thunderstorm and the TV failed after that.

            Section 6 in the service manual talks about power and no screen,...
            10-30-2024, 10:09 AM
          • nick31
            Panasonic Plasma ST50 TC-P55ST50 P55ST50 8 blinks
            by nick31
            Hello,
            My Oct 2012 panny plasma quit working yesterday.
            It was on when it happened. It let out a bit of burned plastic/circuit board smell. I was not able to find any burned parts though.
            Now it produces 8 blinks. According to the repair manual, that points to SS/SS2 board(s).
            I completed the steps in the guide: unplugged SS33, the TV turned on with a black screen, no blinking codes. Then I checked the continuity between pins 1 and 2 of the connectors SS52, SS54-SS57. The continuity is ok in all of them. Guide suggests to replace SS/SS2 boards so I placed an order...
            04-21-2021, 09:56 AM
          • stecos
            Panasonic Plasma main board repair (ST30 GT30 VT30 ST50 GT50 VT50),LED with 3 blincks
            by stecos
            Hi everyone!
            I happened several times, in the search for help from the web, to consult this very interesting forum.
            So I decided to sign up and I intend to participate actively by making available my knowledge and experience on the subject, I'm a new user but at the same time I'm old in the sense that I have 4 decades of experience in repairing and designing electronics but above all I'm a great passionate about the subject.

            Having said that I come to the gist of my post on the forum as the title suggests.
            For my passion for technology I'm now collecting several...
            11-28-2022, 11:39 AM
          • Biruslapio
            Panasonic P58V11B 8 and 12 blinks error "fix"
            by Biruslapio
            Bought this TV used not working, panel flashed briefly on power up and it was blinking 8 times, a quick look on SS board revealed a common fault on the 3uF 250V capacitors, C201 to C205 (C1620X in the service manual), the solder joints were all cracked, C201 and C205 pins were darkened and some sparking had occurred on them, C201 was split open and clearly overheated in its last hours, replaced that one and resoldered the others, 8 blinks fixed.

            Also the previous owner broke the antenna connector by taking the TV out of the wall mount forgetting to unplug it, I desoldered the tuner...
            04-13-2021, 07:13 AM
          • Loading...
          • No more items.
          Working...