Bn44-00289a

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • Hurricane_
    New Member
    • May 2022
    • 8
    • Romania
    #1

    Bn44-00289a

    I have the source from the title because of which I had no backlight. A transformer was broken and I changed it.
    Now the backlight appeared, it's ok, except that the mosfet transistors for one of the transformers reach about 150 degrees and would probably burn if I left them.
    I changed the transformers between them, I changed the lamps between them or with new ones, I changed the transistors between them or with new ones, no change, the exact same transistors heat up from exactly the same position.
    Any idea?
    Tags: None
    • nomoresonys
      Badcaps Legend
      • Jan 2013
      • 12214
      • U.S.
      #2
      Re: Bn44-00289a

      having a hard time visualizing it, can you post some pictures of it.

        Comment

        • Hurricane_
          New Member
          • May 2022
          • 8
          • Romania
          #3
          Re: Bn44-00289a

          https://www.aliexpress.com/item/4000...martRedirect=y

            Comment

            • ducky29
              Badcaps Veteran
              • Dec 2015
              • 369
              • Europe
              #4
              Re: Bn44-00289a

              Hello. What is the position of the transistor that its getting hot?

                Comment

                • Hurricane_
                  New Member
                  • May 2022
                  • 8
                  • Romania
                  #5
                  Re: Bn44-00289a

                  Are the transistors for the transformer next to the 220v AC connector

                    Comment

                    Previous template Next

                    Related Topics

                    Collapse
                    • throwaway327
                      Asus ROG Ally X -RC72LA - changed hidden bios settings with 'Smokeless-UMAF', won't get past boot logo
                      by throwaway327
                      ASUS ROG Ally X - (Handheld Gaming PC)
                      Model No: RC72LA
                      Serial No: SBNVKD001014459

                      Hi all, I've spent the past week digging through the forums and guides to try correct my foolish mistake of changing hidden settings while tinkering around, and to be honest my heads overloaded so I'm hoping you'll be able to help.

                      I used a tool called 'Smokeless-UMAF' to access usually hidden settings in the bios. I tweaked one or two 'safe' things but made the mistake of tweaking a lot of settings under 'USB/Thunderbolt Configurations' when I didn't know what they did. For...
                      06-18-2025, 05:52 PM
                    • Francesc V.
                      Onkyo A8200 - Not the right voltages in some transistors
                      by Francesc V.
                      Hi:

                      I am trying to repair this amplifier that I've bought as faulty. I've found some transistors damaged, the ones where I am drawing a red circle.

                      With the final transistors not yet installed (the expensive ones), I've started to measure some voltages:

                      Where I am supposed to have 1.12V (base Q524/Q523) I am reading -42V..................both channels don't seem ok.
                      Where I am supposed to have -1.12V (base Q526/Q525) I am reading -44V..................both channels don't seem ok.
                      I removed and tested Q514,Q516 & Q513,Q515 but the analyzer...
                      04-19-2025, 07:17 AM
                    • redbaron1007
                      Sundown SFB-8000D What are these transistors?
                      by redbaron1007
                      I had a Sundown SFB-8000D amp come into the shop yesterday that wasn't giving any output. The guy who brought it in said he bought it off some crack head on Facebook marketplace for a good price, but bought it knowing it was broken. Apparently the original owner was cutting out the transistors to the right of the ones pictured whenever one would blow and take the output out. Best I can figure he also cut the legs on the S5 and S6 ic's as well and soldered them back together.

                      My problem is Sundown decided in the factory to remove the original markings on the IC's and now I can't figure...
                      11-12-2023, 07:30 PM
                    • Bob Wong
                      MSI Crosshair 15 A11UEK. Need help with Transistors!!!
                      by Bob Wong
                      Welcome badcaps, repairing a Crosshair 15, in need of transistor specifics. Received a broken laptop that's was perfect for repair, threw away the looser transistors in a haste... Should and could have salvaged them.
                      In any case, I will be posting all my discoveries to this forum as a thanks in advance. Thanks in advance lol.

                      P.S. If anyone is familiar with such things, as in, If anyone knows that MSI uses one or one of a few types of transistors when marked with a number please let me know how I can find more specifics before I start throwing hail marys.
                      03-15-2025, 02:02 PM
                    • Userrrname
                      Tx-pr42gt30 6 blink
                      by Userrrname
                      👋đŸģI recently got a tx-pr42gt30, I bought it in non-working condition. When I opened it, I saw that all the transistors and diodes had been removed from the tnpa5330, and several microcircuits were in poor condition, so I decided not to try to repair it. Instead, I bought another tnpa 5330 (also AB), which was already repaired (according to the seller, the board was repaired and worked before the screen was damaged), transistors were also changed on it, but Chinese copies were installed (there is no round hole in the middle, the inscription is easily erased) and a pair of transistors that...
                      07-19-2025, 07:53 AM
                    • Loading...
                    • No more items.
                    Working...