Question about Philips 51PW9363 51" Rear Projection HDTV-Ready Television

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PHILLIPS 51PW9363 SOUND BUT NO PICTURE. ALREADY REPLACED HIGH VOLTAGE TRANSFORMER NOW TWO TUBES GLOW AND ONE ARCS IN THE TUBE BUT WONT GLOW IS IT THE TUBE OR SOMETHING ELSE?

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  • Philips Master
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The one that is arcing may be bad...slowly take the board off the bottom of that tube...then power on...If the other tubes light up again you found the problem.

Posted on Jun 21, 2009

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Posted on Jan 02, 2017

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Picture flickers every few minutes


There are several possibilities. This model is based on CRT (picture tube) technology, and has a high voltage circuit. This circuit consists of three heavy wires, one from the side of each picture tube (red, green and blue) going to a single connection block. There is another heavy wire from this to the high voltage transformer on one of the circuit boards.

First, unplug the set, and wait 20 minutes to make sure everything is cool and residual high voltage charge has drained away. Check the wires at the connection block to make sure they are not loose. There is usually some sort of retainer clip to lock the wires in place, make sure these are not broken or unlatched (sometimes they get brittle with heat and aging). Frequently these are covered with a thick layer of dust held on by electrostatic attraction; gently vacuum this off. If all looks good, plug in the set, and wait until it's dark outside. Turn on the set with the room lights off, and look at the high voltage parts. If you see a blue corona glow or sparking, that part has an insulation breakdown problem or a bad connection. It is normal to see an orange glow at the bottom of each picture tube, and you would also see the three colors of the picture coming out of the tops of the picture tube. WARNING: do not touch the interior of the set while it is on, especially not in the dark.

Another probable cause is a cracked solder connection on the power/deflection board (the one with the high voltage transformer on it). If the flickering is one color rather than white or a momentary darkening, the problem is in one picture tube circuit (yellow -> blue dropout; ->cyan -> red dropout; magenta -> green dropout). The picture tube circuit includes not only the high voltage (second anode) section, but also the picture tube drive connection on the base of the tube all the way back to the video processor and switching circuits.

Apr 04, 2015 | RCA D52W20 52" Rear Projection HDTV-Ready...

1 Answer

My rca p52926 picture cuts in and out


If model number is correct (on rear of set in small letters it should be a PTK 195 chassis) you have a high voltage lead somewhere that is arcing.

This set did have issues with the High Voltage transformer failing and also that High Voltage (well over 10,000 volts) gets distributed to each of the 3 picture tubes this model uses.

Sometimes the lead where it connects to one of the tubes begins to arc---it is coated with white silcone to prevent this.

If arcing around the entry point to any of the tubes sooner or later it will take the set down--destroy parts that are currently ok.

Usually we locate this by turning set on with back off and looking and listening when set is turned on---If a frying or pop is heard up above the main boards--one of the entry points (called the 2nd Anode) is arcing.

I have seen them arc hard enough and long enough to actually crack and break the glass wall of the picture tube.

May 16, 2012 | RCA P52926 52" Rear Projection Television

1 Answer

How can you tell if a dlp picture tube is burned out


Most of the times in the back of the board it connected to it or a high voltatage wire from the CRT tubes.They're arcing a small light,like lighting strike and making buzzing sound,that indicated the CRT tubes are not taking any more high voltages from the FBT- flyback transformer.The other times just CRT tubes those glasses holding those CRTS tubes fillerments look very old and fillerment in sides not as bright as the other CRT tubes.Very saldum but very small cracks causes by heat over times.

Feb 04, 2011 | Samsung HL-S6187W 61 in. HDTV

1 Answer

It has an electric arc in the back an makes a cracking noise


the high voltage runs the picture tubes. you have a bad high voltage transformer (large signal board) or something wrong with the anode wires (big red ones) or could be a bad tube. this has 30,000 volts so be careful or call a Pro.

Sep 09, 2010 | Philips 60PW9363 60" Rear Projection...

1 Answer

Plug tv in and i get a large snapping sound from the back end


Hi:
This is usually an indiction of a cracked flyback transformer or splitter block, the spitter block is responsible for dividing the high voltage between the three CRT's or picture tubes. This could also be caused by a open tracing in the Horizontal scan circuit, Sometime bad horizontal caps go bad and cause this error also, there could also be a cracked picture tube at its neck, the best way is to take off the back and make the room dark as possible and stand a short distance away and have someone turn on the unit, you will see the arc of blue high voltage from the defective part.

Aug 24, 2010 | Zenith R56W36 56" Rear Projection...

1 Answer

Tv went off and won't come back on.


the arcing sound is some kind of high voltage leak, which will shut down the tv. pull the speaker grill off and the access board, look at the 3 picture tubes, turn the set on you will see where the leak is, it's usually the high voltage splitter, which has a high voltage wire going into it and 3 high voltage wires coming out going to the picture tubes, if it arcs from the splitter you need to change it, if it arcs from one of the picture tube wires you need to pull the tube out and fix the high voltage leak, and possibly a cooling fluid leak caused it, not an easy reapir, you probably need a repairman.

Sep 08, 2009 | RCA P52926 52" Rear Projection Television

1 Answer

My 52 inch rca tv has sound but the picture keeps popping on and off .what can be wrong with it?


2 THINGS THAT USUALLY CAUSE THIS PROBLEM IS
1) THERE IS AN ARC FROM ONE OF THE PICTURE TUBE ANODE LEADS--15.00-- THE TUBES ARE STILL GOOD , JUST THE LEAD IS BAD---NOT EASY TO REPLACE ,,YOU HAVE TO CUT THE OLD ONE OUT AND REPLACE USING SEALANT ....
2) A PART CALLLED A HIGH VOLTAGE BLOCK--75.00--THIS PART TAKES HV FROM A FLYBACK TRANSFORMER ,,,SPLITS THE VOLTAGE TO GO TO THE 3 PICTURE TUBES
KEEP IN MIND ,,IF YOU HEAR A POP--IT'S USUALLY A HIGH VOLTAGE ARCING TO SOME METAL--YOU ARE BETTER NOT PLAYING THE TV

THESE JOBS ARE BEST DONE BY TECH'S -TUNICA

Oct 19, 2008 | RCA P52926 52" Rear Projection Television

1 Answer

Beeping tv that doesn't go


The flyback is the High Voltage transformer. The piccture tubes will usually make a sharp snapping noise if its arching. the beping is what leads me to believe its High volyage related usually the picture tube when it shorts will shut the set down but wont make it beep. Is this a RCA or phillips TV? Whats the model number and I will try to be more specific for you.

Apr 09, 2008 | Televison & Video

1 Answer

Red and Green picture with ghost images


sounds like the high voltage transformer arc or one of the picture tubes arc causing the convergance ic to go bad
you can try to replace the IC heres a site to help:
http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm

but you still may have a arcing problem.

Dec 11, 2007 | Pioneer SD-533HD5 53" Rear Projection HDTV

1 Answer

Sparking Sounds and the picture jumps momentarily.


You need to remove the back and observe where the spark is coming from while the set is on. Dimming the lights may help you. Sometimes you can see a blue glare accompanied by an ozone smell. You might even hear a sound such as a slow air leak in a tire. The most likely area is around the high voltage transformer or the picture tube anode. The transformer has the thick red wire or wires coming out of the top. Also follow the three red wires to the picture tube anode( the place where the red wire plugs into the tube) Use your senses, listen smell , and look for any blue glare or arcing to the metal frame. If you find the leak near or on the transformer use 100% silicone rubber to patch. Allow at least 12 hours to cure. If the arcing is coming from the picture tube contact me for detailed instructions. You must act promptly and find the source of the arcing before you have a dead set. In short, spark + flash = crash. Good luck

Nov 13, 2007 | JVC AV-48WP30 48" Rear Projection...

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