power supply bn44-00259a dead

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  • nic2
    New Member
    • Dec 2012
    • 6
    • abruzzo
    #1

    power supply bn44-00259a dead

    Hello I have read several posts on the subject but I have not found a case similar to mine. The TV is dead no picture no sound no red light in.standby. Checked voltage CP 815 = 326 v.dc. on the power circuit BN44-00259A. The connector CNM802 provide no evidence output voltage. The capacitors seem undamaged no anomalies. I replaced two electrolytic capacitors (CP809 and CM808) leveling power of the integrated FAN 7530 and who had a ICE3BR0665J ESR too high unsuccessfully checked all the diodes and transistors involved but do not come out
    Who can help me?
    thanks

    Service Manual:
    http://elektrotanya.com/samsung_ln26.../download.html
    diagram at
    https://www.badcaps.net/forum/attachm...5&d=1300162507
    Tags: None
    • selldoor
      Slow Learner
      • Dec 2010
      • 7870
      #2
      Re: power supply bn44-00259a dead

      Double posting will not help you - ask the mods to remove this thread.

      The members who know about tvs may be busy. Really good pictures of your boards may get a few more interested.
      Please upload pictures using attachment function when ask for help on the repair
      http://www.badcaps.net/forum/showthread.php?t=39740

        Comment

        • nic2
          New Member
          • Dec 2012
          • 6
          • abruzzo
          #3
          Re: power supply bn44-00259a dead

          I replaced the diode IN4740AS - zm801 found in short and magically the TV is on and everything is back to work properly. I could not find the diode and I used a zener diode compatible. The problem has been resolved. Thank you.

            Comment

            • whiz62
              whiz62
              • Dec 2013
              • 242
              • usa
              #4
              Re: power supply bn44-00259a dead

              Originally posted by nic2
              I replaced the diode IN4740AS - zm801 found in short and magically the TV is on and everything is back to work properly. I could not find the diode and I used a zener diode compatible. The problem has been resolved. Thank you.
              I also had a bn44-00259a with bulging caps and that did not solve problem. Replaced zm801 and zm804 diodes and it powered on. Thanks for the tip!

                Comment

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