LG 50PK590 VSC low

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • sordids999
    Badcaps Legend
    • May 2013
    • 2158
    • uk
    #1

    LG 50PK590 VSC low

    hello guys

    got this tv that would power up VS 200 volts VA 57 volts but no picture but VSC AND VY was low so ordered a replacement Yus which arrived today but upon fitting still the same so tested for test patterns which worked so main board was faulty luckily had a replacement,so tv is all working fine now but with fours vertical lines.
    I know the panel is proberly faulty but i still cant get good readings off the Ysus

    readings as follows
    VS 200 volts
    VA 57 volts
    VSC -104 volts
    VY -104 volts
    VZB -115 volts

    any ideas why readings are so low

    thanks
    Attached Files
    Last edited by sordids999; 01-07-2016, 11:17 AM.
    Tags: None
    • sordids999
      Badcaps Legend
      • May 2013
      • 2158
      • uk
      #2
      Re: LG 50PK590 VSC low

      pictures
      Attached Files

        Comment

        • sordids999
          Badcaps Legend
          • May 2013
          • 2158
          • uk
          #3
          Re: LG 50PK590 VSC low

          Just tried the old YSUS and same readings so it was the main board at fault but just cant understand why voltages are low on both YUS`s

            Comment

            • ReeceyBurger123
              Never Give Up !
              • May 2014
              • 7325
              • Britain
              #4
              Re: LG 50PK590 VSC low

              Mainboard isnt puimg Vs on low enough. Also Panel is toast seen it on the model before
              Please Do Not PM My Page Asking For Help Badcaps Is The Place For Advise, Page Linked For Business Reasons Only. Anyone Doing So Will Be Banned Instantly !

              https://www.facebook.com/Telford-Tel...7894576335359/

                Comment

                • Alastair E
                  Chief Womble
                  • Mar 2013
                  • 1963
                  • U.K.
                  #5
                  Re: LG 50PK590 VSC low

                  IF you are going to scrap that due to the panel lines--let me know, Be interested in the PSU. I Think I have one of those sets (Y-SUS looks similar from memory) that's messing round, No Vs Va etc, need to get back to it...

                  My set is an early FHD set about same vintage as the Q97 series...
                  TELEFIX

                  How PLASMA SCREENS WORK, X-SUS and Y-SUS what they do--
                  http://www.irf.com/technical-info/appnotes/an-1088.pdf
                  PLEASE DO NOT EMAIL ME PRIVATELY FOR REPAIR ADVICE. QUESTIONS BELONG ON THE FORUM!

                    Comment

                    • sordids999
                      Badcaps Legend
                      • May 2013
                      • 2158
                      • uk
                      #6
                      Re: LG 50PK590 VSC low

                      Yeah I'll strip it for spares got it cheap anyway shame really watching it now looks good apart from the various lines

                        Comment

                        • Alastair E
                          Chief Womble
                          • Mar 2013
                          • 1963
                          • U.K.
                          #7
                          Re: LG 50PK590 VSC low

                          Thats the trouble with any flat-screen-- Till you actually get it running--Gawd knows if the screen is any good....
                          --Ive no idea if this set I have is any good, but reckon its worth giving it a bash, even if it costs a few quid...
                          TELEFIX

                          How PLASMA SCREENS WORK, X-SUS and Y-SUS what they do--
                          http://www.irf.com/technical-info/appnotes/an-1088.pdf
                          PLEASE DO NOT EMAIL ME PRIVATELY FOR REPAIR ADVICE. QUESTIONS BELONG ON THE FORUM!

                            Comment

                            • sordids999
                              Badcaps Legend
                              • May 2013
                              • 2158
                              • uk
                              #8
                              Re: LG 50PK590 VSC low

                              yes its very frustrating indeed alastair

                                Comment

                                Previous template Next

                                Related Topics

                                Collapse
                                • u666sa
                                  HP Envy x360 13-bf0013dx (i7, 8gb) ipa32 la-m024p rev 1b short near PJ1802, type-c not switching to 19 volts
                                  by u666sa
                                  Laptop is HP Envy x360 13-bf0013dx, hp website link, it's an i7-1250U with 8 gig onboard ram.
                                  Platform: ipa32 la-m024p rev 1b



                                  Originally you'd plug power supply into it and it would take up to 1.2 amps and then drop to 200 milliamps and then go back up again to 1.2, staying all the while at 5 volts. Pressing power button would results in power LED blinking amber 3 times. 3.3 volt rail, 5.1 volt rail present, main power rail 8.8 volts. Power button test pads near EC chip 2.7 volts.

                                  I found a short on the other side:



                                  ...
                                  Yesterday, 05:03 PM
                                • supermattch
                                  HP 15dy-2021nr wont power on mystery volts
                                  by supermattch
                                  Hi everyone.

                                  I am diagnosing my personal laptop, because it wont power on and no leds light up.

                                  At the dc-in there are 8 pins, 1 and 2 shows healthy 19.66 volts. The next three are ground, but the 6th one shows .283 volts. This is strange to me, it should be 3.3 or 5 or aome volts not 0.283v. As I am new to this, I would like some guidance. Please someone advise me on what to check next.

                                  Oh the boardview and schematics I am using is for a similar model as I cannot find the proper one anywhere. Quanta DA0P5HMB8F1 rev F. Nowhere on the internet.
                                  09-23-2025, 12:13 PM
                                • MisterAIL
                                  PS5 digital / No Power / No Beep / Good power supply
                                  by MisterAIL
                                  Hi everyone,

                                  Brought a non functionnal PS5. Apparently only a bad PSU...
                                  No beep, nothing.

                                  After some tests i found this :
                                  - PSU is fine (12 volts stable)
                                  - 12 volts line is shorted
                                  - DA9065 was fried, F7003 also => Replaced both of them, short is gone on 12 volts line, no dead short anywhere else.
                                  - By the way, nothing change. No signal, no power, no beep.

                                  Mesuring all rails with my workbench psu (12 volts input)
                                  - 0.00 amp drawing
                                  - 12 volts, 5 volts, 2 volts, 1,15 volts are presents (suppose new DA9065 do is...
                                  3.3v PMIC
                                  5 Photos
                                  03-12-2024, 03:24 PM
                                • Mcfeetroy
                                  Fishing bite alarm drains battery
                                  by Mcfeetroy
                                  Good day to all. The bite alarm drains 9-volt Krona batteries. Current consumption when switched on is about 50 mA. I wiped the board from oxides, I will attach a photo (on the board there is a j3y transistor and a 7533 stabilizer, the microcircuit is erased = (the 3.3-volt stabilizer heats up weakly. I replaced it, nothing changed. I unsoldered the microcircuit, the consumption disappeared. The resistance on the pins of the unsoldered microcircuit from the point clockwise is more than 2 megaohms, the 11th leg is presumably ground. I warmed up the microcircuit, the consumption does not change....
                                  08-01-2025, 03:52 AM
                                • BTubbs200
                                  Dead Dell Latitude 5420 not receiving 20 volts from USB-C charger
                                  by BTubbs200
                                  Hello,

                                  Dell Latitude 5420 P137G
                                  Board: LA-K491P REV A01

                                  I have received this laptop which was described as "does not power on or accept charge." Battery shows no sign of charging when charger is plugged in, nor does the board show any signs of life when battery is unplugged and charger is plugged in. No light from the LED at all or any other indications of activity.

                                  Board seems to have no shorts, all power rails are fine and show high resistance.

                                  When charger is plugged in, voltage is present in 3.3V rail but absent in others....
                                  01-24-2025, 08:15 PM
                                • Loading...
                                • No more items.
                                Working...