Samsung 32 Inch power supply problem BN44-0260A

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • provider10
    Senior Member
    • Mar 2016
    • 52
    • South Africa
    #1

    Samsung 32 Inch power supply problem BN44-0260A

    Hi
    This set uses the BN44-0260A Power supply
    It came in with IC UM8015 (ICE3BR0665) Blown
    Replaced IC but now I have a stable 13 Volt but the 5volt rail is pulsing around 2.5 volts. Checked diodes and caps but getting nowhere
    Can anybody Help

    James
    Last edited by SMDFlea; 06-03-2021, 06:56 AM. Reason: added "BN44-0260A" to thread title
    Tags: None
    • provider10
      Senior Member
      • Mar 2016
      • 52
      • South Africa
      #2
      Re: Samsung 32 Inch power supply problem

      Hi looking through the forum I find that the post from Moolink on 07-28-2012, 03:43 AM is basically the same set. But the diodes in my set seem to be OK. The fault occurs with or without the main board connected

      Thanks

        Comment

        • dick_barton
          Badcaps Legend
          • Aug 2015
          • 6642
          • Wales
          #3
          Re: Samsung 32 Inch power supply problem

          What voltage do you have on inductor LM851
          If it is pulsing then I would lift one end of LM851 and check the voltage across CM852 and if it is not pulsing then I would check QM853 However if it is still pulsing then I would check DM851.

          I can't find a schematic but I did find this
          https://archive.org/details/Samsung_...0260A/mode/2up
          Last edited by dick_barton; 05-29-2021, 04:34 AM.
          Willing to help but I'm no expert.

            Comment

            • R_J
              Badcaps Legend
              • Jun 2012
              • 9535
              • Canada
              #4
              Re: Samsung 32 Inch power supply problem

              Check the voltage across CM804 and see if it is steady (around 20~25vdc) CM804 or CM808 could be bad. You should also check the voltage across the main cap CP815, this voltage should be around 385vdc if the pfc circuit is working.

                Comment

                • provider10
                  Senior Member
                  • Mar 2016
                  • 52
                  • South Africa
                  #5
                  Re: Samsung 32 Inch power supply problem

                  Hi Guys

                  Thanks for the help. I found the voltage across CM804 was only 12v. Changed the caps didn't help . Found Zener diode ZM801 faulty

                  Thanks for the assistance

                  James

                    Comment

                    Previous template Next

                    Related Topics

                    Collapse
                    • cheeky2
                      Samsung BN44-00262A H37F1-9SS power supply help finding blown value components!
                      by cheeky2
                      This Samsung combined power supply and inverter was replaced a while ago from a Samsung 37inch LE37B530P7W TV. However I would like to repair this one.
                      I have replaced the Mosfets Q1820 and Q1821 ( FDPF7N50U) which were both blown and the fuse FM802S. The schematic for this power supply that is attached doesn't relate to this power supply as the driving transistors and diodes are D1830, D1831, D1832, D1833, Q1811 & Q1810 are nowhere on the schematic!
                      Does anyone know what the components for D1830, D1831, D1832, D1833, Q1811 & Q1810 should be? I ask as I did change the Mosfets...
                      06-15-2025, 05:12 AM
                    • sam_sam_sam
                      Desoldering gun station modified to use a 18 volt @ 20 amp switching power supply
                      by sam_sam_sam
                      I have wanting to do this project for quite sometime now and I finally found a switching power supply that will work on this desoldering gun station ZD-915 that the original switching power supply took a shit and just was not worth trying to fix it because this switching power is not quite big enough to handle the heater element and the vacuum pump

                      One note when I tested the switching power supply and the voltage control board I noticed that this desoldering gun heat up much faster than the original switching power supply which I was really surprised by to the point that I might buy...
                      03-31-2024, 02:12 PM
                    • howardc64
                      Samsung UN55JU650DF network/streaming problem
                      by howardc64
                      Fixed a 9 year old UN55JU650 by replacing backlight. Original backlight LED was still working after 27k! hours but terrible picture of course. Few LEDs were out, 5-6 lens fell off (bright white spots) and another few popped off with slightest force. Surviving LEDs were all slightly blue so picture has a blue tint.

                      This TV runs older Tizen OS (updated to latest version, see pic) and have problems with network (wifi or ethernet) connection. The Tizen UI frequently switch to coax input source while changing content sources. . If no good signal (coax not connected, no prior antenna/cable...
                      07-09-2025, 12:44 PM
                    • sempre
                      Samsung T22b300 power supply problem
                      by sempre
                      Hi I'm trying to repair the Samsung lt22b300 power supply. I replaced the srtw6052 chip that was shorted together with the blown fuse and a blown 222 1kv capacitor.

                      Now if I check the output voltages they all seem ok, but as soon as I connect a load, led or mainboard, all the outputs become oscillating (backlight flashes).

                      To rule out problems with the LEDs or the main board, I tried to replace the power supply board (PD23A0Q) with a borrowed one from another working TV and everything works regularly.

                      I checked all the diodes and non-smd capacitors...
                      03-08-2022, 05:51 AM
                    • Cookybaby
                      Samsung UN60ES6500FXZA Power Supply Issue
                      by Cookybaby
                      Hello Everyone, this is my first post and I am excited to be a part of such a great community. I've been reading these forums for awhile and there really is some good friendly people here. No bashing and being rude like 90% of other forums Ive been to. Lets get to the good stuff.

                      I have two years of college in Electronics Engineering Technology. Ive been tinkering with electronics sine about 1990. I know enough just to be dangerous, so be gentle.

                      Make: Samsung
                      Model: UN60ES6500FXZA
                      Power Supply P/N: BN44-00525A

                      Symptoms: The TV was...
                      08-20-2023, 12:26 PM
                    • Loading...
                    • No more items.
                    Working...