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Repair to be rectified

I purchased a colour tv of model 2119.few days the picture was notseen fully,but only 3/4 of the screen only seen for aweek.since three days there is no picture and no sound.

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Hi there!
My guess is that you have a frame collapse. This is run by a circuit in the TV that opens the screen from top to bottom. If it was a second hand purchase then this could be due to general failure. I would return it to the seller for repairs, Good Luck, JUS004

Posted on Mar 11, 2008

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Posted on Jan 02, 2017

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Three coloured lines appered on the screen - no picture


If there is no picture and 3 vertical lines in the center of the screen, stop. Turn off TV. You have no horizontal deflection happening. Lines will burn into crts and be permanently visible after repair.

No horizontal deflection is caused by Horizontal sweep circuit failure, maybe flyback transformer and associated components. More than a simple do-it-yourself repair.

easyab

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SONY TRINITRON ONE COLOUR PREDOMINANT SCREEN


Sony Trinitron sets are of CRT [Caothde Ray Tube] types. The common fault seen in these type of TVs are any one colour predominant on screen wih sound OK. Either red, blue or green colour with some thin horizontal lines at about an inch apart will be seen on the entire screen. This is totally a display card problem, which can be seen pluged onto the picutre tube neck. There are three electron guns for every picture tube, which emits red, blue, and green beams, which in turn illuminates the phosphor on the screen to get that colour. If no emission from all guns, results in a blank screen, ie black screen without any disply at all. The three colour beams together produces proper coloured picture what we see on screen. These three gun's terminals are brought out by pins of the picture tube outside to which video signals are given in appropriate proportion to produce a TV picture. Normally, all these three pins are biased with a voltage of about 170 to160VDC+ve. Take one colour gun, as an example and and let me describe the problem.
Let it be a green gun. These guns are called cathodes of the picture tube. If it gets a voltage with respect to its grid, it will emit electrons according to the voltage applied to it. This is a negative process, that is, as the voltage at this pin drops, its emisson incresses and vice versa. If the emission increase, the colour with respect to that gun also will increase and gets predominant at the screen. So when we see a green predominant screen, there will be less voltage at the green cathode with resepect to the other two. If red colour is predominant, the voltage at red cathode will be less than the other two. If blue colour is predominat, the voltage at the blue cathode will be less than the other two.
We must find out the reason for this fault first. Assume that your Tv has a red predominant screen with some thin lines across it, at about one inch apart of the entire screen, it is clear that the the red cathode voltage is very lower than the other two. the main reason for this fault, normally seen in most of the Sony Trinitron, are loose soldering points either to the picture tube base socket or the resistor connected between the red drive transistor's collector point. Resoldering the most of these points on the base card by applying a little more solder will rectify this probelm. Other possibility is shorted video output transistor of that cathode. A direct short [collector to emitter] of these transistors will drop volatge to very low at that respective cathode of the picture tube, and that colour will be pridominant along with lines. Replacing the transistor will solve the problem. In some cases, the resistor connected to that transistor may have blown out. If so, it should alo be replaced. Whatever the case may be, voltage at the respective cathode that emits colour will be very low with respect to the other two. Find out the reason and rectify it. You can compare the voltages of the other two cathodes with respect to the faulty colur cathode. Cathode pins will be marked on the base card, and can be identified. It is best to pull out the base card from the picture tube neck and place it somewhere a safe place without shorting it with other parts of the TV. You can measure the voltages of these points very easly, without fearing the damge to the picture tube. After all are found Ok, replug the base card and switch on the TV. The set will be alright. In rare cases, chroma IC also can be a reason for this fault. if it is faulty, after a short period after switch on the TV, the IC will overheat and shutdown the entire system.

on Mar 21, 2011 | Televison & Video

1 Answer

Sony model#kdf50e2000.turned it on a few days ag0 heard a few clicks, green light come on a few times then it gives me three red blinks stops then three red blinks again and again.no sound no picture.i...


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1 Answer

Blue screen only now on all inputs....


Good Day,

nniemeryer;

NO not simple problem. This dlp has so many problems that you have not experienced yet but you will. To repair this concern will be into the same $7-800.00 range again.
Not much of a market to sell this but can try local service shops/ or internet type places.
But let's not get too much in front of ourselves. I would call the manufacture and complain and try to get them to repair unit, tell them (they know) you know that TV is having a lot of problems and service bulletins written on this model. Here's their info:

Consumer Relations
Consumer Issues
Phone 7:00AM - 5:00PM PST ......(800)332-2119
Dealer or Servicer Referral(24HRS)..(800)332-2119
FAX (24HRS).........................(949)465-6147
FAX Document Retrieval System(24HRS).(800)332-2119
I hope this has been helpful,

big IRISH.

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1 Answer

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First check the antenna! After that, look for colour changes/ shadows alongside text on screen, of some particular colour. Has the set been dropped? If so, static convergence can be knocked out, you need a professional.
If it is just generally blurred, obviously something has changed, but it might respond to adjustment of the focus control (inside set). This is still a job for a serviceman if you don't know anything about TV circuitry.

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3 Answers

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Sounds like a tuner or Video output problem. What make and model set do you have.

Jan 09, 2008 | Televison & Video

1 Answer

Black screen, small portion of top of picture in view at bottom of screen


your tv has a vertical problem take it to a tech to have them look at it probably on transporting the set to your house it bump around.a look on lose solder could be the problem this could be verified by a tech.good luck.you need the repairman.

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1 Answer

Black screen w/small portion of top of picture showing at bottom of screen


Hello, the problem with your projection TV is in the so called bad soldering in the vertical deflection stage. Please contact a pro in order fot fix the error. If you need more assistance please advice. Arpi

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