Question about RCA D52W19 52" Rear Projection Television

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Blown Board inside TV

Power Light flashes 3 timesthen nothing. I took the back off and found the front left board with a blown component and a burned spot about 3 in in Diameter. a hole through the board about a 1/4 inch. Bardode sticker on PCB has the number: PSB-850 C019 18606 448612284. How can I replace this board. I went to a Tech school to learn how to repair TV's abot 10 yrs ago so am fairly comfortable with doing this just need to be able to find this board.

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  • Yeager68 Feb 12, 2008

    Its the white board to the left of the geen PCB with the small components. Model # is D52W19byx1. Is the flyback the large black component with the thick red cable going into it?

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Is it the board with flyback or the green one with the small parts/// also on the label on the back of the tv there is a model number and then in smaller letter there is the model number plus some suffix numbers yx1 or somethig to effectd52w19yx1. thats important in determining part muber.

Posted on Feb 12, 2008

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Lost power completely


If you are comfortable with working in tv circuit boards then unplug tv from AC wall socket, take off back of tv and follow AC cord going inside tv that will take you to power supply board, check fuse on power supply board, replace it with same rating written on it if it found blown.
Replug tv back in wall socket and check if it turns On.
If still problem not solved then power supply board is defective and need to be replaced.
Local tv repair shop will help you if you think its not safe for you to work inside tv.
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Toshiba 57H81 Flashing Red Power Light, Blown Fused F850+F852


Solved by resoldering some solder joints!!!!!!!
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Toshiba Model 57H81 Rear Projection TV - Purchased 11-09-2001

Problem: Toshiba 57H81 Flashing Red Power Light, No Picture/Sound, Blown Fuses F850 + F852

Symptoms January, 2009:

  • Upon turning on set I got flashing red power light and nothing else.
  • Removing plug for one minute and plugging in results in:
    • Audible click, steady red power light for 2 seconds then slow flashing red light
    • Pushing power button results in steady red for about 2 seconds then slow flashing red light, no other set activity
  • Removing power cord for several hours and plugging back in made no change
    • Audible click, steady red for about 2 seconds then slow flashing red light
  • Possible related note: Over past several months occasionally the entire screen would flicker momentarily and at other times be problem free for weeks.
  • Fuses F850 and F852 found blown

Repairs Made:
  • PD0074 DEF/CON Power Board
    • There are two main power supply capacitors in this set. They are C-809 and C-810. One their negative lead on the printed circuit board re-soldered leads and nearby contacts. I’m told that because the factory left out a printed circuit board eyelet, the connection will come loose over time. When I called Toshiba customer service they said there was a known solder joint problem causing blinking red light.
    • Replaced blown fuses F850 and F852.
      • I actually installed a fuse panel on the inside of the cabinet and routed the fuse connections here instead of ordering the special fuses and replacing them on the circuit board.
      • Had to use a 5 Amp SLO-BLOW for F850. Fast blow does not survive power up. Get the red blinking light.
      • Used a fast blow 2 Amp for F852.
  • PD0073 SIGNAL Board
    • Re-soldered Q751 + Q752 STK392-110 Convergence Amps
    • Re-soldered adjacent pads that looks suspicious

Total Cost to Repair about $10
  • Twelve hours of my time over three days to research issue, disassemble set, make repairs, add fuse panel.
  • Already owned Service Manual and Circuit diagrams from a different 2004 repair.
  • Less than ten dollars at Radio Shack for fuses and fuse panel. Already had wires, etc.
  • Some solder. Already owned de-soldering tools, etc.
  • Visited both local authorized Toshiba factory service repair facilities. One said repair would have to include replacing Q751 + Q752 STK392-110 Convergence Amps with ST392-180, and realigning set for a total of $500+ and it would be more if they had to order a power board. NO THANK YOU! Other shop said $65 for site visit and $30 to make an estimate that could be applied to repair.

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1 Answer

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