LGPC3D-UD On and Off

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • thefisher86
    New Member
    • May 2018
    • 8
    • USA
    #1

    LGPC3D-UD On and Off

    So my buddy got a new TV when his old one broke and gave me the broken one as I've fixed a computer monitor before. It's a LG PC3D-UD. Opened up the back and took a look around. There's a bunch of caps on the power supply that look blown. When I fixed the computer monitor all I did was replace a few blown caps and everything worked again. Given the sheer number of caps that look blown on here I'm wondering if they just kinda all went bad in parallel or if this a bigger problem I'm not seeing.

    Also, I was able to find the service manual for the TV but it seems to exclude any information on the power supply at all (other than the partnumber for the whole PSU board). Anybody know if there's a schematic for the LG 6709900020A Power board? I'd like to be 100% sure before I order new caps.

    Finally, I'm pretty new to all this so any advice would be helpful!

    :edit: I'm also pretty sure the solder I have is terrible for working with PCBs would love a recommendation on what type of solder I should be using.
    Attached Files
    Last edited by thefisher86; 05-08-2018, 07:40 AM. Reason: additional questions
    Tags: None
    • Diah
      Badcaps Legend
      • Feb 2013
      • 6336
      • Germany
      #2
      Re: LGPC3D-UD On and Off

      you are in right thought , replace all of them as they are in Cold area, so if there was load on one for example the load will be on other too.

        Comment

        • dick_barton
          Badcaps Legend
          • Aug 2015
          • 6642
          • Wales
          #3
          Re: LGPC3D-UD On and Off

          I use standard 60/40 lead/tin solder and a good soldering iron. Surprised the set worked for as long as it did with all those blown capacitors.
          If it's a good set I would replace as many of them as I could to future proof the power supply. Use low ESR, high temperature capacitors. Panasonic FM/FC/FR series for example.
          Last edited by dick_barton; 05-08-2018, 08:20 AM.
          Willing to help but I'm no expert.

            Comment

            • thefisher86
              New Member
              • May 2018
              • 8
              • USA
              #4
              Re: LGPC3D-UD On and Off

              dick_barton I'm nearly finished desoldering the blown caps. Could you link to an example of those Panasonic caps you're talking about? I need a 10v 3300uH for most of them.

                Comment

                • dick_barton
                  Badcaps Legend
                  • Aug 2015
                  • 6642
                  • Wales
                  #5
                  Re: LGPC3D-UD On and Off

                  Just search through Mouser,com and enter Panasonic FC or Panasonic FR ets in the search box.

                  https://www2.mouser.com/Panasonic/Pa...5hqw?P=1yzvjj0
                  Willing to help but I'm no expert.

                    Comment

                    • thefisher86
                      New Member
                      • May 2018
                      • 8
                      • USA
                      #6
                      Re: LGPC3D-UD On and Off

                      Cool thanks, I ended up finding it after all!

                        Comment

                        Previous template Next

                        Related Topics

                        Collapse
                        • corrize
                          Best way to solder LVDS connector for beginner (and qfn) ?
                          by corrize
                          Hello, I'm a beginner for micro soldering. Right now I have some difficult to solder a qfn 20, I guess I put too much solder on the thermal-ground pad, the result is a corner of chip wich don't touch the board (last try).

                          I use a wire solder with hot air, I tin the board and chip before with iron and I use good flux.

                          I will have to solder a LVDS connector (40 pins, laptop pc), I saw a solder paste in seringe, good quality (it does not scatter).
                          See the test :
                          https://youtu.be/bNAzC-EvqHs?t=1767

                          With hot air from bellow the board, that's...
                          03-09-2023, 02:57 AM
                        • cmlewis89
                          LG 47LB5DF blown power supply board
                          by cmlewis89
                          Hi folks,

                          I'm new to this forum. So my trusty 17-year-old LG 47" LCD recently died. As I was booting it up, I heard a hum followed by a loud bang, sounds of pieces flying around, and loss of power to the unit. Inspecting the PSU, I saw two obvious problems: a blown thermistor (bang + flung pieces) and a visibly bulging main cap. Inspecting as many components as I could with my Fluke MM, I diagnosed that the following components on the "hot side" of the board were also bad: one of the 2 main MOSFETs, main 8A fuse, small cap (25V 47uF) connected to main caps, and a blown...
                          12 Photos
                          09-03-2024, 07:50 PM
                        • myth77
                          UV solder mask - high temp resistent, recomendation?
                          by myth77
                          Can someone recommend any good UV solder mask? But i need a solder mask that will stand high temperetures. The thing is...sometimes i have a bigger cooper ripped from the board, lets say mosfet pad... i reconstract it with cooper sheet, then i "glue it" with solder mask...then i use UV light...and let it cool a bit. After, i try to clean the cooper of extra solder mask..and till that part all is ok. But, when i use a soldering iron to solder that pad/cooper...the solder mask gets weaker or destroyed and finally the pad is ripped again from the board .
                          Is there any solder mask...
                          03-28-2022, 04:04 AM
                        • petemanuk
                          BGA solder balls not connecting - help pls
                          by petemanuk
                          So I though in my spare time I’d set myself up repairing motherboards mainly pin damaged lga1151 sockets types.

                          I’m using an achi ir sc pro rework station (gave up on my Achie ir6500 - don’t recommend)

                          I’ve managed to get my rework profile somewhere in the correct region (after a lot of trial and error) to get the old sockets off and reflow new ones back on again, the problems I’m getting is not all of the solder balls are re-attaching when re-flow occurs. I know this because when socket is removed pads still look clean and have no solder...
                          11-16-2022, 05:21 AM
                        • drscoot
                          HP X360 convertible battery blown fuse error, not charging
                          by drscoot
                          HP Modelnumber: 14-dh0061nb​
                          This laptop had a shorted cap on a Vcore section. After replacement is works again. But there is still a battery issue.
                          The battery is HT03XL and with the built-in component test from HP, in the Power section, I get an error: Logic State: Calibration required (20), Charge state: Blown Fuse (42)
                          I have another same battery, also with error: Logic State: Very Weak (70), Charge state: Blown Fuse (42)
                          And a third battery TF03XL (looks identical) with error: Logic State: OK (0), Charge state: Blown Fuse (42)
                          All these 3 batteries are charging...
                          charging section
                          2 Photos
                          12-15-2023, 05:54 AM
                        • Loading...
                        • No more items.
                        Working...