Question about RCA D52W20 52" Rear Projection HDTV-Ready Television

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D52W20 TL120 transistor

I need a part number for the TL120, I ordered the Thompsons manual and it is difficult to read and it does not match the circuit board I have. We started with only one green light and changed out the flyback. Now we have three blinks and cannot find the part number for the TL120 HELP

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  • 5 more comments 
  • bgbrd9 Sep 15, 2008

    No squealing sound at all and the transister in question is a little smaller than the H.O.T. that is on the heat sink. The transister is located at L-4 on the board

  • bgbrd9 Sep 15, 2008

    It has three leads, looks just like the H.O.T. but is a little smaller

  • bgbrd9 Sep 15, 2008

    The TL120 is just at the right corner of the middle heat sink

  • bgbrd9 Sep 15, 2008

    circled in yellow

  • bgbrd9 Sep 16, 2008

    can you tell me where to order this board. The regulator is shorted

  • bgbrd9 Sep 17, 2008

    I'll let you know how things turn out when I get the parts Thank you

  • ladywinn
    ladywinn May 11, 2010

    Does the new flyback make a squealing noise when set trys to come on and is TL 120 mounted on heat sink behind FBT?



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  • RCA Master
  • 5,138 Answers

Is the TL120 does it only have 2 leads? I will look this up when i get to my shop, also the SSB board can be defective causing no high voltage be sure to recheck all ribbion connectors second ribbon connector on fbt board if not in right set will not come on.

Posted on Sep 15, 2008

  • 2 more comments 
  • ladywinn
    ladywinn Sep 15, 2008

    OK i know which part you are talking about i was going to look it up let me do some checking around and i will get back to you asap. Does part read shorted out of circuit?

  • ladywinn
    ladywinn Sep 16, 2008

    You can order the complete board for around 77.00 #258762.also TL120 is regulator for hori circuit. still dont have the part number yet working on it.

  • ladywinn
    ladywinn Sep 17, 2008

    Call UNion Electronic Distributors 1-800-648-6657 or go to web site they have the part you need TL120 part # 259871 when ordering a board make sure you have right board number for your set D52W20 it is supose to be 258762.Good Luck with the repair.this should fix your set.

  • ladywinn
    ladywinn Sep 17, 2008

    They have 1 transistor in stock 259871 st18030hi 10amp 600volts price 3.55.



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