Question about Toshiba 32A35 32" TV

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Crooked picture looks like the tube needs to turn clockwise

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Try to turn the yolk,its at the back of the tube

Posted on Jan 13, 2009

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WHAT WOULD CAUSE THE TV BLINK ON AND OFF ?


The picture tube is right on the edge of working with the set's AKB, or auto cathode balance. All Sony tube TV's use AKB. AKB is a circuit that attempts to compensate for aging of the picture tube (among other things), and if the tube isn't conducting enough (due to age), it will intermittently blank the screen or, in severe cases, not allow the picture to come on at all. But if you are comfortable taking the back off of the set and making a minor adjustment, you can probably restore the picture for a while longer. Take the back off, turn the set on to a blank channel (receiving snow). You will see a large gizmo with a thick red wire coming out of it going up to the glass on the picture tube. That's the high voltage (a.k.a. flyback) transformer. On this transformer will be a small knob labeled "Screen." If you turn this control ever-so-slightly counterclockwise, the screen will blank off immediately. But if you turn it just a bit clockwise, it may fix your problem. Don't go too far with this control, just enough to make it work. This is DANGEROUS FROM HIGH VOLTAGE, so make sure you have a qualified tech help you do this.

Jul 04, 2010 | Sony KV-32S42 32" TV

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Screen displays a picture then goes dark...continuously repeats thsi cycle. After set is on for some time the picture displays slightly longer but the cycle repeats...tried removing power cord from call...


If you have the model that I'm familiar with, there is a good probability that the picture tube is starting to fail. If you are comfortable working inside the set where there are potentially dangerous high voltages, try the following:

With the back off, locate the flyback transformer. This will be the part with the large red wire going to the side of the picture tube. On the back of the transformer should be a couple of adjustable knobs or holes. One should be labeled screen the other focus. Try turning the screen control SLIGHTLY clockwise. Then try the set. If the picture remains on, then you have bought yourself some time to locate a replacement. This fix will not last long. If there is little effect, then the tube is likely failing and the set needs to be replaced.

Please post the model number and the results of the above.


Thanks,

Dan

Jul 18, 2009 | Sony Standard (CRT) Televisions

1 Answer

Red standby light light blinking


The 5 blinks can indicate a picture tube starting to fail. Carefully open up the back and look for the flyback transformer. It will be the part with the large red wire coming out the top that goes to the side of the picture tube. There should be 2 controls on the flyback, screen and focus. Turn the screen control slightly clockwise. If the set stays on, the picture tube is starting to fail and you have bought yourself time to find a replacement. If that fails, then you will need to investigate other possibilities that will involve soldering. Let me know if you need to do that.

The 6 blinks indicate no horiszontal. This can be as simple as a couple of bad capacitors or the "jungle" IC. If you can solder, please post another question with the model and a brief description indicating that you can work in the set and we'll continue to track this down.

Thanks,
Dan

Dec 15, 2008 | Sony FD Trinitron WEGA KV-32FS120 32" TV

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Standby


I think your picture tube is weak.
You can verify this by taking the back off and slowly adjust the the screen control (it is mounted on the flyback transformer) the one with the wire coming out the top and going to the picture tube
the lower one. it is black and serrated and less than 1/4" in diameter.
turn counter clockwise first then advance it while someone watches for the picture.
If it comes on you know the tube is weak.
it may last for a while at that setting, but be prepared to buy a new set.
Thanks Guy9

Jun 07, 2008 | Sony FD Trinitron WEGA KV-32FS120 32" TV

1 Answer

Sony Trinitron - Picture Disappears


Hi, IK circuit is engaging which basically means the picture tube is getting tired, the only "fix" is temporary (may get another year out of it). You have to increase the "screen control clockwise".
Remove back of set, follow large black or red wire attatched to picture tube down to the flyback transformer, mounted on flyback are two black controls, one is focus (leave it alone) the other is "screen", adjust it clockwise approx. 1/4 inch, remember that this is a high voltage circuit so use one hand in the set the other hand out of the set at all times,any questions ? e-mail me back, good luck, BMW Rider

Feb 27, 2008 | Sony FD Trinitron WEGA KV-27FS100 27" TV

1 Answer

Sony Trinitron experiences


The screen control inside the set may be on the highvoltage transformer or on the crt socket; either way if you can turn it up just a little clockwise and the picture comes up but doesn't look good you are likely to have a bad tube. Or try tapping lightly on the glass neck and watch the picture as you tap. If it reacts to the tap you have a bad tube. but the turning the screen control is the best test. Turn it the other way the picture goes off immediately. bad tube: too costly if it is available.

Dec 29, 2007 | Standard (CRT) Televisions

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Television


tbrace, your picture tube is getting a little tired, the "IK circuit" is causing the blanking of the video because the tube is not returning a large enough signal back to the IC that monitors it. Theres only one fix (besides replacing the tube) for your set and that is to turn up the screen control. You have to remove the back from the set and on the right hand side there is a large plastic part called a flyback transformer, with a heavy wire coming out of the top which goes up to the picture tube, mounted on the front of this transformer is 2 black blastic "philips type" controls, one over the other look closely and one will be marked focus(do not turn that one) and the other is the screen control, turn the set on and SLOWLY turn the control clockwise until you see a bright picture with white lines in it, once you see the lines turn it back until they disappear, (check several channels to be sure they are gone) your done, may last 3 weeks, may last a year, it`s all you can do, BMW Rider

Dec 14, 2007 | Standard (CRT) Televisions

1 Answer

Sony Television


Unfortunately that's an indication of the crt going bad in a Sony.
You can turn the G2 voltage down on the flyback or have a tech rejuvenate the picture tube but either of these are only a temporary fix..
The flyback is the rather large transformer with a red (anode) wire coming from it and attaching to the crt. (looks like a suction cup).
There are two adjustments on the back of the FBT, one is screen (or G2) the other is focus. With the unit on turn the G2 counter clockwise just a little and the picture will get slightly less bright. That should stop the picture from blinking out - or doing so as often. But again, it's only temporary!
Good thing Santa's almost here... :)
Bill

Nov 26, 2007 | Sony FD Trinitron WEGA KV-32FS120 32" TV

1 Answer

Dark screen/picture.


This 30" flat screen TV set may have a problem in the high voltage circuit of the TV set. You may be able to adjust this by taking off the back of the TV set. Look for the block where the large red wire runs up to the top of the picture tube. On this block will be two controls. one will say screen and one will say focus. Try and slowly turn the control that says screen or S on it clockwise and see if you can make the picture brighter. Turn up the control till you just start to see faint lines in the picture, then back the control down till the lines go away. If the picture does not come up when you turn this up, and all you get is a blank screen, you will need to have this set repaired by a qualified repair person. Good Luck

Jul 14, 2007 | Sanyo HT30744 TV

1 Answer

Blurry screen GE 25GT511


hi There shouldnt be much in the focus system to go wrong as really there is nly the tube base and the flyback transformer. The usual for a TV is the tube faulty so its beyond repair. You could try the focus control, this will be on the flyback transformer. Back off TV, look for a heavy lead going to the dome of the tube at centre top and with eyes ONLY follow that back to the flyback transformer. On the side of that transformer is 2 screws, one near the top is the focus control. You will need a screwdriver to turn it and it usually has a seal to be broken. That will turn from say 8 o clock to 4 o clock no more, turn it up clockwise, try both ways. if it almost fixes but not quite it would be the tube. good luck

Mar 21, 2006 | GE 25GT511 25" TV

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