Question about Toshiba 24AF41 24" TV

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Distortion Hello and thank you in advance for the help. I have a 24" toshiba with a line across the screen on the top. Well more like a distortion, for example movie credits roll back into the of TV.

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It could be 2 things...
1. Bad filter capacitor on Verticle B+ supply.

2. Bad Screen voltage Capacitor.

Geno

Posted on Mar 18, 2008

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Lines and distortion across screen


Check and replace the smoothing capacitor used at it video output voltage This capacitor can be located at the neck board of picture tube.To get more details, http://electronicshelponline.blogspot.com/ Pull up older posts.

Nov 29, 2013 | Philips Magnavox 20MT133S 20" TV

1 Answer

Toshiba 32AF45 CRT TV Distortion and Flicker During Moments of High Contrast?


Check its main power regulator section circuit. Replace all the electrolytic capacitors there. This is a power supply fault.

Mar 21, 2013 | Toshiba 32AF45 32" TV

1 Answer

When ever there is some strong white on the screen it gets distored. For example. There was a white tent on screen and where the light was hitting it it was extremely pixelated and distorted. Ny ideas?


Hello
This fault can occur to mainly three reasons. ABL circuit failure. Low screen voltage or lack of emission from picture tube cathode. Just advance the screen voltage to a little, and observe the result. Screen control can be located on its Line Output Transformer [LOT]. there will be two variable controls built on to LOT marked as screen and focus. Screen control will be at lower side, and focus will bw on the top. Just advance [clockwise movemnt] to a little, not more, advance it till retrace lines are just visible on the screen. Before doing this, set all the picture controls, contrast, colour and brightness of the TV to zero. Once the retrace lines[thin horozontal white lines across the entire screen at about 1 inch distance with each other]; are visible, stop there, turn the screen control counterclockwise to just a point when these lines are just goes off. make this adjustment in a dark room so that you can set this point very correct. After this check the perfomance of the picture. If this does not help you, ABL circuit should be checked for any fault.
If emission of the picture tube has got down, even the screen adjustment said above won't help you. The only way is to replace the picture tube with same type and number. OK.

Apr 16, 2011 | Sanyo DS24424 24" TV

2 Answers

My 36 inch RCA tv has black bars on the top and bottom of the screen. The color is also dark even in daylight scenes. Can you help with this color.


as a general rule, vertical faults can be divided into two types: ones that cause geometric distortion (a circle will not be round) and those that simply black out a portion of the screen. the former are faults in the vertical oscillator, drive, or output stages. the latter are blanking faults. blanking faults are almost always caused by electrolytic capacitors changing value and thereby changing the timing of the pulses which blank the screen during vertical retrace. In other words, the pulses are turning off the video signals at the wrong time. the most common true vertical fault is geometric distortion and a foldover of white lines at the top of the screen. this is almost always caused by the electrolytic capacitor on or near the collector of the vertical output transistor or part of the IC which has the supply voltage (B+) on it. In the old tube days, the general rule was that bottom distortion was in the cathode of the output tube and distortion at the top was caused by a fault in the drive circuit. this may help the solution!!

Mar 27, 2009 | RCA F36673ET 36" TV

1 Answer

Toshiba CF2772B New in 1992. Has black band across the bottom


If the pix was good up until this point, I would take the plunge and repair it, even though it may be close to 200 US...accordianman

Nov 11, 2008 | Toshiba 27A33 27" TV

1 Answer

32Inch Flat Screen SDTV - with picture distortion


If you have a TV shop at all any more in your area, any tech working on them will know where to look. This is a pretty common problem although you are getting it too early.
Since it will require a certain type of instrument (capacitance meter) to verify the problem part, I don't want to go into detail concerning a 'do-it-yourself' repair since it may be a little difficult to order these in single quantities and a decent shop should have the right value on hand.

It shouldn't cost too much.

Jun 28, 2008 | Philips 30PW633R 32" TV

1 Answer

Sudden color/picture distortion


you have a shorted green CRT that is affecting the other crts the short is internat to the crt that leaves what is called retrace lines. if the set is more than three years old then replace all three guns.

Feb 25, 2008 | Samsung TX-R3080WH 30" TV

1 Answer

Black horizontal lines across bottom 1/3 of screen


This is due to vertical section failure. Change the vertical supply rectifier diode and supply filters. Then check zener diode leakage in pumpup circuit section. Also check any electrolytic capacitors leakage in vertical section. If it is old model tv change vertical height, vertical lenearity presets also. I hope given details useful to you.

Aug 23, 2007 | GE 27GT722 27" TV

1 Answer

Toshiba horizontal distortion


sound like you may have bad connection at or in the tuner section. U could try soldering around the board at the tuner area and if U should deside to try with in the tuner a fine soldering tip is require and solder all the grounds in and out ( out, the main pc board)

Dec 23, 2006 | Toshiba CF30F40R 30" TV

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