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Toshiba TP50F61 Switch red like blinking. It did came on a few seconds the off forever. I unplugged overnight and plugged then press the power button at the panel, hearing a crack as usual then nothing happened. I tootk the board out, of course labelled all the wires/plugs, visual inspected the solders, but did not see anything unusual. My question is can I take the board to the tech shop for checking or anyone willing to take this. Please give any suggestion. Info. Chasis no TAC 9875 Date 6/1996 Model TP50F61 Serial number: 91985060 G-board Thanks for help. hllp ps. I have the picture of board if you need to see

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  • Anonymous Mar 03, 2009

    I was watching the morning news when all the sudden the set turned itself off and started blinking the red led power indicator, I try to turn it back on with the remote but it would not let me turn it on or off and I was forced to unplug the unit to get the light to go out. I then plugged the set back in after about 10 minutes and was able to turn it back on but it did the same thing after about 4-5 minute of viewing it . This set has never had any problems at all in the past so this comes as quite a surprise, any ideas??? I have looked and found no blown fuses on the circut board.by the way this also is a Toshiba TP50F61 built in June of 1996.

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SOURCE: Toshiba 57H81 Flashing Red Power Light, Blown Fused F850+F852

Solved by resoldering some solder joints!!!!!!!
********
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.

Posted on Jan 05, 2009

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