Question about Sony 32 in. LCD TV

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Difference between colour picture tubes & associated circuits and

I what to know what is the difference between colour picture tubes & associated circuits and LCD daysplay and associated circuits.

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Write the application of color picture tube and associated circuit

Posted on Mar 13, 2010

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Tv picture tube


It is not the fault with the picture tube. The fault will be to its chroma section circuit, or, its tuner. Contact any service technician.

Jul 24, 2013 | Sharp Televison & Video

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Cathode emission check for colour picture tubes


<p>How to check the colour cathodes of a picture tube for emission<br /> <p> <br> <p>It is very easy to cehck the emission of the cathodes of a colour picture tube. Assuming all other circuit parts are working, including LOT [Line output Transformer] and video output section.<span> </SPAN>There is proper screen voltage; focus voltage and EHT [Extra High Tension]. Locate the three cathode points on the base card, usually marked as Gk, Bk and Rk.<span> </SPAN>Keep the brightness, contrast and colour control to zero position.<span> </SPAN>Take a wire of suitable length, say 50cms or so, tie its one end to TVs chasis [negative].<span> </SPAN>Take one resistor of value 100K 1W, tie its one end to the other end or the wire, thus one end of this resistor is now connected to negative chasis and the other end of it is free now.<span> </SPAN>Hold this resistor with with some electrically noncunductive material [using hand gloves will be better]; switch on the Tv, wait a minute or so to get it warm up.<span> </SPAN>Just make a touch at each cathode of the picture tube base card solderings.<span> </SPAN>Just one touch will give you a colour of the respecive cathode on the screen.<span> </SPAN>Never hold it for long time. This process can be used for checking cathode emission of any type of Cathode Ray Picture tubes. <br> <p>

on Apr 18, 2011 | Televison & Video

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I have a Toshiba Regza 32lv 703G lcd tv. I switched it on and I have lost my colour. It only displays in black and white although the menu screen is till displaying in colour. Kindly advise. Thanks!


It is pretty much junk, sorry to say it but your picture tube went out and it is cheaper to buy a new t.v. My grandpa use to fix them for us for free but he passed:( If you call some where see how much they would charge for a picture tube, I bet it's expensive???

Jan 15, 2012 | Toshiba REGZA Televison & Video

1 Answer

Sony XBR 40" tube tv.


Failure of the vertical deflection module/circuit. The tv will have to be opened, the vertical deflection circuit found and replaced.
Definitely a job for a pro - the circuit is going to be extremely difficult to extract. The repair will cost you about $200: $20 for a new circuit and $90 per hour for the 2 hour job.

Sep 03, 2011 | Sony BRAVIA KDL-40S2000 40 in. LCD HDTV

1 Answer

NO Picture


hello,
First check if the power cable of the television is firmly connected to the main socket, if otherwise open the back cover of the television to check for blown fuses, and otherwise .
well this is common on your model and could be a few different things. one is the video circuit and a cost would range around 100.00. the other is a weak picture tube this would cost more than the TV . sometimes when it is the tube we can adjust it but it does not always last long. sounds to me it would be better to invest into a newer TV in this case.
Hope this help....
good luck :)
let me know if you need more info??

Jun 02, 2010 | Hitachi 50VG825 50 in. LCD HDTV

1 Answer

JK321 32" High Definition LCD TV no picture has vertical lines on left side of screen, is it worth fixing.


Hello,

well this is common on your model and could be a few different things. one is the video circuit and a cost would range around 100.00. the other is a weak picture tube this would cost more than the TV new. sometimes when it is the tube we can adjust it but it does not always last long. sounds to me it would be better to invest into a newer TV in this case.
good luck :)

Jun 02, 2010 | Proview PA-32JK1A 32 in. LCD Television

1 Answer

Picture appears "red" where digital pixels should be black


Call Associated Electronics @ 414.281.1000 and tell them what you need.

Mar 23, 2009 | Toshiba Regza 32LV67U 32 in. LCD HDTV

1 Answer

When switched on the set gives a picture for 2 or 3 seconds and then goes black but sound remains. Remote changes channel but still no picture.


hi sir,,
there are only three things to check which causes these problems...

first check whether the cathode ray tube is ok or not
second whether the fuse is damaged
third is the colour wheel,,,
if these are not defnility the circuit problem,,,diodes capacitors

thank u,,,,,

Mar 06, 2009 | Hitachi 26LD6600 26 in. HD-Ready LCD...

1 Answer

Picture on big screen


Chances are, if it's an older set, componants have changed value through use over time, which also includes the picture tubes and associated driver circuits. The way to compensate for this color drift is through adjustments. Either turn the red down a little, or turn the blue and/or green UP. Be carefull though as there are potentially dangerous voltages in and around the circuit boards and picture tubes.

Jun 29, 2008 | Zenith P42W46X 42 in. Plasma EDTV

1 Answer

Lcd tv picture wavy, black and white


by calling the tech they will answer your problem they will verify the problem in your colour circuit, the colour crystal or other related circuit could be your problem,the tech will give you the answer.good luck.

Apr 01, 2007 | Dell W2600 26 in. LCD Television

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