Question about Pioneer SD-P50A3-K TV

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Tv keep turning off

My sd-p50a3 is turning off by itself and i can figure out why. i call an expert and they said it was the power source. i will turn back on every once and a while, please help!!!

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Re: tv keep turning off

I had the same problem with mine and they said it was the "converjence chip"?  Anyway cost me about $350.00 to fix.

Posted on Oct 11, 2007

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Re: tv keep turning off

I believe they're right, it sound like you have intermittant connections on the Power/Deflection board (not uncommon with projection tv's over five years old.

Posted on Oct 01, 2007

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Re: tv keep turning off

It's the power source.

Posted on Sep 30, 2007

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The fuse (FU 105) of my Pioneer SD-P50A3-K burned and I swapped it. Now when I turn on my TV it stays on for a few minutes and turns itself off; I turn it on again and the same thing happens. I believe...

There is a high possibility that the components over a period of heating and cooling, tend to bring on a problem of dry soldering. So my advice is to check the set for some loose joints that have played on to give you these erratic shut downs or poor performance. The best way to check for loose connections is to tap lightly when the set is powered on, if there is change while tapping then it seems that there are DRY solder joints. Remove main plug, the covers - with caution of high voltage, check for dry joints, and use a good soldering iron to solder all suspected points. Sometimes the fault occurs when the set warms up; if so you can simulate the heat using a hair dryer on the suspected areas, try with the power supply, distribution, Processor controller, driver controllers on the A/V related sections. Also the use a FREEZE-IT spray can simulate the components to cool and show up the fault. It can also be related to WEAK ELECTROLYTIC capacitors as the value can reduce in time. Based on the above method you must be able to locate the area of fault and solder the sections.

Oct 06, 2011 | Pioneer SD-P50A3-K TV

1 Answer

SD P50A3 Q red Standby is on....will not power up.

ok sir you have defective power supply at hot side section! and the power oscillstion circuit! your unit need to diagnos to know the exact defective parts!

Oct 21, 2007 | Pioneer SD-P50A5-K 50" Rear Projection...

1 Answer

Tv turns off

cant solve, but my problem is identical!

Oct 05, 2008 | Pioneer SD-P50A3-K TV

1 Answer

Tv turning off automatically

I have the exact same problem. did you get a fix?

Jun 08, 2008 | Pioneer SD-P50A3-K TV

2 Answers

TV Turns off automatically

Could be a problem with the flyback /auto transformer / powerboard. I'd get those checked first..

May 10, 2008 | Pioneer SD-P50A3-K TV

1 Answer


same problem here

Dec 20, 2007 | Pioneer SD-P50A3-K TV

4 Answers

I don't know what is going on...?

Remove solder from regulator output pins (on convergence pcb),clean and resolder.Practice visual acuity technique=solder any/all bad connections.Hire a pro,if need be.

Aug 30, 2007 | Pioneer SD-P50A3-K TV

1 Answer


Hi tedski have a tech look at your tv the problem is in the power supply or related circuit.good luck

Apr 26, 2007 | Pioneer SD-P50A3-K TV

1 Answer

Fuse fired (ON SECONDARY STAGE OF POWER SUPPLY) when you turn on the tv.

There are alot of problems with this set. I do not have a manual but have worked on several in a shop while I was in NY. If you want, send the manual to amd I will see what you are talking about. Please include a note on the exact fuse that keeps blowing.

Mar 22, 2007 | Pioneer SD-P50A3-K TV

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