How to test my sustain board to make sure my buffers won't be killed?

Collapse
X
Collapse
 
  • Page of 2
  • Time
  • Show
Clear All
new posts
Previous 1 2 template Next
  • capkid
    Badcaps Legend
    • Oct 2010
    • 1339
    • United States
    #21
    Re: How to test my sustain board to make sure my buffers won't be killed?

    I got as far as step one of the flow diagram before I found an issue. When I disconnect the SC2, SC23, and SC20 connectors, the TV stays on and has sound. According to the diagram, the SC board is most likely defective - doubt it.

    I tried disconnecting the D board from the SC board, and the TV stayed on with sound and no picture. The SC board's LED wasn't lit. I'm guessing that the TV stayed on because there was no feedback to shut down the TV.

    I just noticed that the panel seems to buzz a bit louder than normal for the brief time that it illuminates

    Edit: Correction - the panel buzzes quite a bit louder than normal. So, it looks like this one is trash.
    Last edited by capkid; 11-30-2013, 01:33 PM.
    LG Plasma Mal-Discharge Correction Service

      Comment

      Previous 1 2 template Next

      Related Topics

      Collapse
      • chth96
        How Can I test PWM DM0365R?
        by chth96
        Hello
        I have power adaptor(220V/input, 12V 1.2A/output) which has symptom of fluctuating output DC voltage between 11.5V-12.2V.
        So I opened its plastic case and when switched it on, I heard constant tik tik sound from inside its PCB.
        I measured DC voltage between negative and positive pin of the largest capacitor(400v 10uf) and it was measured contant 300V.
        I also measured ESR value of all capacitors and I noticed that one of capacitor(KMG 16v 470uf), which located in the secondary side, have high ESR value(10 ohm),So I replaced it with same specification NXH capacitor....
        06-18-2025, 04:14 PM
      • khelane
        test active pfc power with lamp test
        by khelane
        Hello
        I have a big problem and that is that in some cases when repairing active pfc power supplies I cannot work with a test lamp. I can only get help with 5 volts standby and for starting and starting I have to work without a lamp and this way there is a possibility of parts exploding and other parts being added.
        Sometimes with a multimeter test the problems can be reduced to some extent, but I had several cases that had to be tested on and online and recently two varistors exploded. They had terrible resistance because the power supplies were over 800 watts.
        Is there a way...
        06-03-2025, 01:00 AM
      • chronic519
        Mats / mods: detected and repaired GPU fault. Cant seem to test after!
        by chronic519
        Hello.

        GPU came in, green lines. Spent lots of time using to get the Mats / mods drive working (found on youtube).
        Found issue with a RAM block
        Replaced, green lines gone.
        Trying to test again, assuming getting the false positive. Originally had over 1K on a single bank. Now getting tosses low between banks.
        Used a good card to test and same results low errors 32+.

        I am just search for some form of command to do a full test on the GPU.
        I just ran the mats command with my good GPU and passed after roughly 40 min.
        The repaired one, ran...
        05-20-2025, 07:56 PM
      • alltvrepairs
        Lg TCon test pins for screen test
        by alltvrepairs
        Hi,
        i have a 65 Panasonic TX-65HX710E using vestel 17MB170 main and Lg tcon.

        Few drops of water fell probably near COF and have no display. Tried removing tabs but no.part of display present as if tcon fuse open. However 12v is present and tcon can be felt warm enough that supplies are present. Backlight and sound ok.

        Anyone knows if this TCon 6870c-0805A has any special test pins for rgb test?

        Appreciate your help....
        2 Photos
        06-13-2025, 06:33 AM
      • gatto
        LG 50PC56 keep burn Buffers Boards
        by gatto
        Hi, I’m new to the forum and this is my first post, so thank you in advance to having me, I have the fallowing problem, could someone please help

        I have this LG 50PC56 which not display image on screen
        I have already change Y-SUS and buffers 2 times! But this TV keep burning my buffers boards!
        When I do install the new Buffers board I been able to see only the top half part of the screen for about 10 min, and then it blow up again! The IC get very hot and I saw some smoke come out from it, so now I have another set of buffers burn out
        My question it is: I disconnect...
        05-04-2022, 01:35 AM
      • Loading...
      • No more items.
      Working...