Diffuser Sheet ripple

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • repair-it
    Senior Member
    • Nov 2020
    • 112
    • US
    #1

    Diffuser Sheet ripple

    I purchased a 43" LG 4k TV last year that was discounted due to damage. The diffuser has a mild ripple in it at the top of the screen. It is a bit annoying. I'm not sure if I can use mild/low heat (iron on a flat surface) to fix it, I'm sure these panels are made using heat but I don't want to add to the problem. I'd also like to know of a resource that sell replacements, if anyone knows of one. This is the very top translucent sheet that is right behind the LED panel.

    thanks,
    rich
    Tags: None
    Previous template Next

    Related Topics

    Collapse
    • howardc64
      A1312 (27” iMac 2009-2011) A1407 (Thunderbolt Display) A1316 (Cinema Display) Display Black Screen Repair
      by howardc64
      Problem

      This is an LG edge LED lit LCD Display. The LEDs are on the bottom edge of the display. There are 2 bars (left and right) Each bar has many LEDs and a 6 pin connector. Each pin drive several LEDs thus is the highest current flow / heat junction. The weak lead free solder gradually fails with thermal expansion/contraction cycling and increases resistance. PSU will compensate up to a point, then when the current is too high, PSU just shut down the backlight causing a dark display. I have even seen one which the connector just fell off as solder points became completely detached....
      08-04-2024, 10:36 PM
    • Lee M.
      LG 55LN5710 backlight diffuser sheet order
      by Lee M.
      Hello all, new member here. I replaced the LED strips and found that the BL can be turned on with the TCON board and LCD panel disconnected. So new LED strips are working fine. Now the problem. There are 3 diffuser sheets on this set. One sheet is thicker than the others and I know it goes in first next to the LED strips. But one side of this sheet has a rougher texture than the other side. Does the rough side go up or down? The 2 thinner sheets have tabs that will only allow them to be installed one way so that's good. One sheet is what I would call plain translucent. The other sheet is whiter...
      11-29-2021, 07:52 PM
    • V3dran
      Diffuser/LPG for UE50NU7022KXXH
      by V3dran
      Hello,
      I'm trying to repair a UE50NU7022KXXH with a cracked diffuser/lpg and now also with burned leds
      There are 4/5 white spots on the bottom that are not visible since the left side is dark now so I want to change the diffuser/lpg

      Looking the samsung spare parts, I see that there is a DIFFUSER PLATE and a LPG so I'm wondering what is really broken?
      https://www.samsungparts.eu/samsung-...n61-15659a.htm DIFFUSER PLATE 1125x625x2,5mm
      https://www.samsungparts.eu/samsung-...n61-15661a.htm LPG 1101x619x2,7mm...
      06-26-2025, 01:54 AM
    • chth96
      Is it no harm to replace with capacitor without ripple current rating?
      by chth96
      When I tried to repair LG 29 inch CRT TV, I found that the ESR value of samyoung SMS capacitor(160v 2.2uf), which is very close to D1879 transistor, is 6 ohm.


      Judging from above ESR Meter Table,I think It is necessary to replace this sms capacitor.So I visited local electronics shop,and I purchased 160v 2.2uf rubycon YK capacitor.
      But when I browse through rubycon YK datasheet,I found that there is no ripple current rating for 160v 2.2uf specification. But On the contrary, I found 39 mA ripple current rating for 160v 2.2uf SMS capacitor.
      Rubycon YK DataSheet (b...
      04-19-2024, 05:19 AM
    • Topcat
      Nihon Kohden (Tyco Electric) ET2400LM 24" Restoration
      by Topcat
      This was rescued from a recycle gaylord from a hospital along with some other things....

      I don't have to explain the significance of restoring this; 16:10 Aspect Ratio, 1920x1200; very high end Samsung LTM240CT04 panel. Add in it's blonde (will pair nice with a retro rig) and also ELO touchscreen. It is very well made, very heavy. Even used these are hard to find and expensive....but it had some problems...

      Problem one, the external PSU was missing. I found one in my stash that had the correct voltage (12V) with the goofy 4-pin plug it used. It however was light on the...
      08-02-2023, 10:07 PM
    • Loading...
    • No more items.
    Working...