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    #1

    Samsung rectifier replacement....

    I have a Samsung LN55C630. The TV was playing the other morning and went out completely. No pix/no sound. Checked power cord, AC receptacle, unplugged /plug the unit….no good. The capacitors on the power supply module I checked visually. I see no bulges nor any sign of leaking. (I have previously replaced 2 bad capacitors in a 37” Vizio that was “strobing') I removed the power supply board (BN44-00342B) from the TV and found 2 fuses….both check good. I checked a rectifier (DM809)..it checked shorted in the circuit. I removed this component from the board and confirmed that the rectifier was, indeed, shorted. I went to Digi-Key to purchased a few capacitors I plan on changing on the power supply board (might as well as I have the board out) and to purchase the shorted rectifier….I thought. No listing nor reference to this rectifier. I checked numerous electronic parts companies on the web and no luck. The part is manufactured by Gulf Semiconductor(China) 31GF2 rectifier is the manufacturer's part number.. On Gulf's web site, it says that this rectifier is “Ultrafast Efficient Glass Passivated Rectifier: Voltage: 200v Current: 3A, Gulf Semiconductor”. I have scoured the net hunting for this rectifier with no results.
    Would someone happen to know the Samsung part number for this item or of a distributor who sells this item? I am not in the market for 100 of these either!…2 will do!! Thanks for any info you may have! Also, is there any component that would make this rectifier short or is this just one of those things? I am experienced at TV repair as I repaired them for 20 years or so. These HD sets are a lot different than the HOT, fly back, CRT TVs I used to repair. Thank you!
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    #2
    Re: Samsung rectifier replacement....

    Try here:
    http://www.mouser.com/Search/Refine.aspx?Keyword=31GF6

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      #3
      Re: Samsung rectifier replacement....

      I had seen this but I was unsure about installing a 600v rectifier in the place of a 200v. I always had used to 10% rule......Would this be OK? This is our only TV and want make the repair ONCE, as the set is mounted to the wall above our fireplace. It's a hassle to get it down!!

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        #4
        Re: Samsung rectifier replacement....

        Yes, it's OK. The higher voltage part would be more expensive. That would be a consideration if you were buying 10,000 of them, but paying an extra $.10 for one shouldn't hurt.

        PlainBill
        For a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.

        Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.

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          #5
          Re: Samsung rectifier replacement....

          Do you know if a schematics diagram is available for the BN44-00342B Power Supply Board? It seems pretty insane (not to mention, expensive) to replace a module/board when maybe one or two components on that board are defective. I was never able to track one down. Found a service manual, but it was no help with that....has a section that says Wiring Diagram....but all that tells you is what board's cable connections go to which board for the different models published in that manual. The other info is good, tho. I ordered the recifier and caps today, so we'll see what happens after I get them installed. I can let you know how it works out! Thanks for you're info!!

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            #6
            Re: Samsung rectifier replacement....

            No guarantees, but try

            http://elektrotanya.com/
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              #7
              Re: Samsung rectifier replacement....

              Originally posted by stonoguy View Post
              Do you know if a schematics diagram is available for the BN44-00342B Power Supply Board? It seems pretty insane (not to mention, expensive) to replace a module/board when maybe one or two components on that board are defective. I was never able to track one down. Found a service manual, but it was no help with that....has a section that says Wiring Diagram....but all that tells you is what board's cable connections go to which board for the different models published in that manual. The other info is good, tho. I ordered the recifier and caps today, so we'll see what happens after I get them installed. I can let you know how it works out! Thanks for you're info!!
              How did it go?

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