Question about Pioneer SD-P50A5-K 50" Rear Projection Television

4 Answers

50" Projection TV

I have a 50" Projection TV and it would keep shuting off after abot 1 hr. now when i turn it on a red light come on then simply shut back off. Now it wont even turn on ... i was told that it my be a regulator switch? I need help..and is it something that i can replace myself?


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  • el seven Mar 03, 2008

    Yes i would love a link to help in the repair of this problem. I have similar issues, it goes into protection mode near instantly. I can see a red LED lit up on the power supply board, i do not know if that details the need for resoldering, flyback replacement, etc... any help would be appreciated, it's the Pio SD-P50A5-K set as well. Built in 1997.

  • bjrose Mar 21, 2008

    I have the same problem. The green light goes on for a second and then turns to red. No picture

  • Anonymous Apr 06, 2008

    I have the same problem and I could use the link for the shutdomn circuitry troublshooting. Thanks Rick

  • phlaxx65 Apr 06, 2008

    tv wont turn on makes a chirping noise.

  • el seven Apr 24, 2008

    I found a 4amp fuse on the power supply board to be the culprit and my set is now working. Look for a mini AGC fuse grouping and check for any bad fuses!

  • thomas perusi Apr 24, 2008

    man pioneer must have seen us coming! my tv would try to come on and I would hit it at first and it would work. After a while it would not work anymore so I read on here about the cold solder joints and I took out the complete powersupply board and resoldered all the bad area. Now I get the green light to come on everytime but now the red portection led on the power supply board comes on. can I unplug some boards to see if one of them is loading it down. I have called pioneer, sams photofax, every manual place around and can not find a print. never buy pioneer !

  • elliottbd Jul 07, 2008

    I have a sd-p5071 pioneer tv and it stays on for about 1 or 2 hours then it shuts off, I unplug it plug it back in and it shuts off in 3-5 seconds. is something getting to hot like the power supply or is there some easy fix.


  • maffitt2008 Jul 29, 2008

    Tv wont power on its like stuck on stand buy we dont have a remote for what to do thank you

  • ljljljlj Sep 12, 2008

    shuts down after 10 min. lokking for the power supply part number



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Pioneer SD-P50A5-K 50 in. Rear Projection...
When the is switched on it turns itself off after 1 minute

Posted on Jul 23, 2008

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I found a 4amp fuse on board the power supply board to be the culprit. Look for a grouping of mini AGC fuses and check them all.

Posted on Apr 24, 2008

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Where is the link, for

Posted on Apr 23, 2008

  • rajirh mk May 04, 2008

    check (or resolder)IC- 2503,2504and Q 3014,3015,
    or some dry soldering related to vertical section


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  • Pioneer Master
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Your set was going into protective shutdown. Probaly a leaky diode that was raising voltage that triggered the shutdown circuitry.Toshiba has good service info available to trubleshoot the power supply and shutdown circuitry. let me know if you would like me to post a link on where you can get this troubleshooter manual .

Posted on Feb 24, 2008

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