Question about RCA 20V500T 20" TV

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Green screen i looked at video card that is connected to the neck of the picture tube. on the card it says R510 WHICH I KNOW IS A 18KOHMS @2WATTS RESISTOR. THE C514 IS BURNT OUT ,BUT I DONT KNOW WHAT ITS VALUE IS OR IF ITS A RESISTOR OR CAPACITOR????? I BELIEVE IF I CAN REPLACE THAT BURNT PART THE TV SHOULD WORK............PLEASE HELP..........THANK YOU VERY MUCH

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Re: green screen

If it is "C514" it is capacitor. maybe the green section from the crt board is dead, try to test the transistor from its circuit or resolder it.

Posted on Jan 19, 2008

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Screen on my jvc av-32850 is green

One colour predominant screen might occur if there is any loose solder terminals at its video output card. This card can be located at the neck of the picture tube, will directly plugged on to its back. Check all the solder terminals there. Re-solder all the suspected solder terminals, by applying a little more solder to each points. To get more details,

Nov 17, 2013 | JVC AV-32850 TV

2 Answers

Screeen color is green

This fault is called one color predominant screen. The cause might be to its video output card itself. There will be some loose solder terminals around the Green video output transistor. Check this card for any loose solder terminals. Just re-solder all the suspected solder terminals by applying a little more solder, without making any solder bridge short in between adjacent solder terminals. This card can be located at the neck of the picture tube [a rectangular board], will be directly plugged on to the back of the picture tube.

Dec 27, 2012 | Curtis-Mathis CM27101S TV

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Picture went all green,what happened?

Check the video output card for any loose solder terminals. Re-solder all the suspected solder terminals. This card can be located at the neck of the picture tube, directly plugged on to its back of the neck.

Aug 19, 2012 | RCA TruFlat 27F520T 27" TV

1 Answer

TV screen stays bleu and dos change to normal raster

Check for any loose soder terminals at the video output card. This card can be located on the neck of the picture tube, directly pluged into it.

Apr 11, 2012 | Standard (CRT) Televisions

1 Answer

Sony Trinitron screen turned pink

Absence of green is the problem. You see mixing of red and blue, which will look like pink.
the fault must be of its video output card. This card can be located at the neck of the picture tube. Check this card, for any loose solder. This is a common problem seen in most CRt based Sony TVs.
Just resolder all the suspected solder points on this board, by applying a little more solder, without making any solder bridge short in between adjecent solder terminals.
images of two models of sony trinitorn TVs, [back cover opend] has been attached here. you can see the boar under suspection, along with the picture tube neck. [See the rectangulat printed circuit board attached to CRT base]3_9_2012_2_12_06_pm.jpg3_9_2012_2_12_38_pm.jpg

Mar 08, 2012 | Sony FD Trinitron WEGA KV-27FS120 27" TV

1 Answer

Evenly spaced vertical lines

Check the smoothing capacitor to video output supply voltage, usually derived from any one winding of the LOT. It will come around 10uF350VDC to 47uF 350VDC range. If this capacitor is faulty, or gone less in capacitance with time, this type of fault will occur. Check the green volour output transistor on the video output card, can be located attached to the neck of the picture tube; for any loose soldering or leakage. OK.

Oct 19, 2011 | JVC AV-32P903 32" TV

1 Answer

Friend gave us a toshiba a3642 tv,the screen is green,is this worth fixing?


Your TV is has no green cathode voltage at the picture tube pin. There are three electron guns for every colur picture tubes, Red, Blue and Green. These three guns together mixes all colours we see on the screen. If any one of them happen to be not working properly, that colour must either be lack, of excess. Voltages at the above said three colour cathodes are somewhat equal to each other. if voltage goes down, the emission of that particular cathode will rise, and as a result that colour will be predominent on the screen.
These cathodes are fed voltages from the video output stage of your Tv. This stage can be located at the neck of the picture tube itself, as a card pluged onto it, called the base card. There will be either three trasistors to drive the each above said three cathodes, in some sets, there will be independent three ICs or only one IC capabale of driving these three catodes will be used.
You just open your TV, after unpluging it from the wall power socket. You can locate the above said base card, at the neck of the picture tube. Before doing anything, check very keenly for any loose solderings are there on the CRT base board. It is very difficult to locate the loose solderings, as they may be microscopic in size. So I advice you to resolder all the soldering points on that board, by applying a little more solder, without making any short circuit bridges in between.
In most cases. this will solve the problem. If not, check the voltages at the above said three cathode, wheere tey were marked on the PCB itsef as R ,G & B. You can see that the green cathode voltage of your set will be much lower than the other tow, in your TVs case. If so, check the resistor connected to the revalent Ic or transistor, whichever it may be, for open circuit. that is check whether it has burned or not. If that resistor is Ok, replace the transistor or IC, which drive the green cathode.
If you wants furthermore assistance, feel free to get me through Fixya. OK.

Dec 15, 2010 | Toshiba 36A42 36" TV

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I have a Samsung CT5038VC CRT TV, it was showing very well , then suddenly, the entire screen went green! you can still see, but everything is green. Please assist me in finding the solution to this...


Since picture is there, sound also mut be. The screen colour went green is your complaint. It is due to the video output stage of your TV. The fault mainly occur in the picture tube base board card. Loose or bad solderings ara always noted. There are three video output trnsistors there in the base board In some models of Samsung sets, either three individual Ics or one single Ic is used. Anyway the fault lies around this card.
You jsut open your TV, pull out the base card from the picture tube neck, care must be taken when you do, not to shake sideways or up down. Just pull it straight back, otherwise picture tube base pins or picture tube neck wiil get damaged. Before doing this check the vlotages of the three cathode pins of picture tube base. It can be done withoug detaching it out from the neck. There are three cathodes. Blue, Green and Red. In most Tvs these voltage will come near to 130 vdc or so. In your TVs case, now the green cathode voltage will be low with respect to the other two cathodes.
This may be due to a loose soldering or fault related to green cathode itsef. If transistors are used, check the green output transistors collector voltage,and compare it with the other two voltages. If Ics are used, do the same. If one Ic is used the checkings are the same.
Just resolder all the loose suspected points before replacing anything first. If it does't help, you just desolder out the green bias drive, whether it is a transitor, or Ic, whatever may be. If it is transitor, just plug it to the picturetube and switch it on without the green drive. Now you must see a different colour, a mingle of red and blue, a type of cyan. If so you can make sure that green output, whatever type it may be, is faulty. Just replace it with same type and number. Check the 2W resistors, if any used, for open, especially to the green drive transistor load resistor. Ok.

Nov 13, 2010 | Samsung Standard (CRT) Televisions

2 Answers

Tv screen shows green/pink

Ur video board that connected to the CRT long neck(tv tube).Have burn,capacitors?Or cold solder socket pins connected to the crt tube,must resolder,might solved prob.

Oct 14, 2009 | Standard (CRT) Televisions

1 Answer

Toshiba cx35f70 35"

It could be a bad solder connection on either the crt drive board that attaches to the neck of the picture tube, the video processing circuits on the main printed circuit board or the picture tube itself. If you can lightly bang the sides or top of the set to get the symptom to come/go, then it is most likely a bad connectiion. If, when the screen goes green, you see fine white lines diagnonally across the screen about a half inch apart, then it is likely the picture tube.

Jan 18, 2007 | Toshiba CX35F70 35" TV

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