Question about Zenith B25A11Z 25" TV

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Zeneth 25" My tv seemed to lose its colour and then the picture darked down. Its a 25 " that is about 11 years old.

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The filter capacitor of 180 volts is weak or change value ,you need to change it .,the of that is 4.7/250volts or 10/250 volts.

Posted on Oct 12, 2008

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24" Panasonic Tau... about 9


Tv is old the tv CRT-(tv tube) it CRT Yoking circuitry not good as before.The tv deguassing coil in not eleminating all the interference of the tv functions anymore.Move the tv unit to the right or to left like about 3 or 4 inches either sides will help for this problems.

Apr 18, 2011 | Panasonic CT-24SL13 24" TV

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Some channels on my tv are dark and tinted orange, I used the menu button to display the menue and scrolled down to picture but I did not know how to select picture.


Hello
Adjust colour control to zero, and check for a pure black/white picture. Adjust contrast and brightness control to minimum and check whether the picture goes completly off or a slight picture prevails. If the picture goes out when you turn down brightness control to 1/3 position, that is about 20 points, your TVs screen voltage is very low, and it can be adjustable. If the picture does not go out and more brightness prevails, screen voltage is high. If the screen voltage is high, there will be some fine lines across the screen at about an inch apart; on the whole screen from top to bottom.
Screen voltage adjustment is critical for the clarity of the picture. If it is low, no proper colour will be dispayed. If it is high, it is harmful to both picture tube and your eyes.
Never try to adjust it without proper knowledge about it. The screen control can be located alongwith the LOT [Line Output Transformer], of your tv. There will have two adjustable controls there, one is for Focus, and the other is for Screen. Both are interactive, that is adjusting one will effect an other.

Oct 18, 2010 | Emerson TS2587D 25" TV

1 Answer

TV buzzes on bright/white picure


This is due to waer and tear meaning the caps in the tuner are waering out you may want to check the cable as well but its far more then that.

May 25, 2009 | Televison & Video

1 Answer

Dark picture, mostly red colors


if you set is over 4 yrs old the tube is at fault,you may try to adjust the screen settings.

Mar 27, 2008 | Zenith B25A76R 25" TV

2 Answers

The picture on my JVC TV is too dark


On the inside of the TV, on the flyback transformer there should be two controls. Turn the one that says "screen" very slowly clockwise while looking at the pix. The pix should get brighter as you turn it up- if you go to far you will see lines in the pix or the TV may shutdown.

Aug 30, 2007 | Televison & Video

1 Answer

Picture problem


Since it is 9 years model definetely loose contact and flux corrosion is there in wire connector and pcb also. Make one general service. Prolem solved.

Aug 23, 2007 | Toshiba CF35F50 TV

2 Answers

Picture is dark


Does not seem like a bad tube alone. Could also be that the Video output Transistors Supply Filter capacitor having dried out. It is a 100mfd 160V capacitor, which on replacement will improve the brightness of the immage. And yes, you could also try increasing the heater voltage (Filament Voltage)of the Pictuire tube, this will definitely increase brightness, but will reduce the life of the Picture tube. You gotta think - 10 year old TV, should I repair or exchange and get a new one???

Mar 03, 2007 | Zenith Z27X22D 27" TV

1 Answer

Picture too dark


You didn't say if you are receiving an off air picture or cable or satellite. The reason the commercials look good is because the local station (or source) transmits them "in the clear", that is, without any enhancements to the video signal. Network programing or local newscasts are sent through a device which inserts a reference signal in what's called the "vertical interval". You may have seen this as a series of flashing dots or pulses at the very top of the picture. There's a lot of information packed into the VITS (Vertcal Interval Test Signal). One of the lines contains a reference pulse for video which is set at a certain level. Your TV sees that level and automatically adjusts its circuitry accordingly. What I suspect is that your set is out of calibration and is pushing down the video signal because it is not "seeing" the level properly. A video alignment should correct this and can be done by a good repair facility. Hope this helps.

Oct 31, 2006 | Toshiba 32AF44 32" TV

2 Answers

Picture deterioration


Your whole problem my freind is dryed up capacitors. You should go, if you have the technical ability to replace these capacitors, to http://servicemanuals.net, download the schematic diagram, and start replacing the waveshaper capacitors in the vertical drive circuit.

Sep 23, 2006 | Sony KV-35V35 TV

1 Answer

Picture disappearance & tv turns off


It sure sounds like you have a classic case of bad solder joints. Resolder all the connections on all boards.

May 31, 2006 | Toshiba 36A43 36" TV

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