Question about Standard (CRT) Televisions

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Horizontal line in my TV.

There is a line about 3" down from the top of my TV set. Credits of a move or show roll over like the old black and white TV's my dad had. I know it is just a simple adjustment if I just knew how to do it.

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Re: Horizontal line in my TV.

"Guest" obviously has no idea what he is talking about. There is no such thing as "frame section" and if the vertical IC, ramp generator or vertical hold circuits were bad, you would have no vertical at all. If you mean that there are thin white lines at the top 3 inches of the picture, and the top of the picture seems folded back on itself, it means that the pump-up capacitor is going bad in the vertical output circuit. This is a very easy thing to correct but should be done by a qualified tech.

Posted on Sep 03, 2007

Re: Horizontal line in my TV.

May it abad capicane in the frame {vertical} circiut

Posted on Dec 10, 2007

Re: Horizontal line in my TV.

If it is old model tv there is a problem in frame section. May be the vertical ic is failure or its ramp generator preset and vertical hold control problem. Change above components problem solved.

Posted on Sep 02, 2007

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Wavy horizontal lines across the screen

It sounds that the main power supply section to your TV has the fault. The horizontal thik lines that appears crawling down across the screen should be of video 'HUM'. Have you replaced the main filter capacitor at the power supply section? If not, replace it along with the main rectifier. The AC power is rectifed by a bridge and applied ot this main filter capcitor. It will have a capacitance value between 120 to 350MFD 450VDC. Check this section. Measure the rectifed DC voltage acorss this main filter capacitor. It should be around 350VDC, if your home power supply line is 220VAC. If it is 110AC, this DC voltage will be around 165VDC; and it should be. If rectified DC voltage found lower than the input AC voltage, replace the rectifier bridge. In some sets, this bridge section have four diodes. Some other circuits, a bridge rectifier stalk may be used.

May 20, 2012 | JVC AV-27050 TV

3 Answers

My 15 year old Toshiba Televisiononly shows a narrow horizontal band in the middle of the screen. Sound OK.

Hiii fairley,

You aren't specsificly dercribe yor tv set.
For common TV horizontal problem ;i.e : White line accross the horizontal screen, horizontal band,'s can solved by replacing the IC Vertical/Transistor, and olso to replace the cap nearest the IC.

For common TV Vertical Problem :i.e : White line at the center of the screen (top to bottom),Vertical band,etc...It's can cure by Replacing the Horizontal IC/Transistor,and offcurse the cap's.

Tha's what all I know....

Hope can help you to solved the problem.



Jun 22, 2009 | Toshiba 32A33 32" TV

1 Answer

Is my picture tube going?

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1 Answer

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the problem there is a loose connection on the board,you said that you smacked the right side of the tv and it goes normal.there are parts that should be resolder on the board in order to back into normal operation.

Oct 22, 2008 | Sony KV-32S66 32" TV

3 Answers

Horizontal white lines across top of TV screen

Hi I had the same problem. Broken white lines across the top of the screen. This is called overscan. You need to go into the Setup menu, other settings. 16:9 overscan needs to be on. Hope this helps.It solved our problem.

Sep 15, 2008 | Panasonic CT-2006S 20" TV

1 Answer

Intermittant white line with subsequent shut down

You have a vert ic problem very common tv problem.





May 17, 2008 | Hitachi 36UX59B 36" TV

1 Answer

White horizontal line down middle of TV screen

caution whenever you see horizontal line please reduce brightness of your tv for safety of crt. your problem in vertical section only mostly due to loose contact in connector,print or loose components.

Sep 20, 2007 | Mitsubishi CS-35505 35" TV

1 Answer

Horizontal lines across the top 2 - 3" of the screen

Sounds like you have some capacitors that are needing to be changed in the vertical circuit. The cost I cannot quote but, it probably won;t be worth the cost as replacement TV's are much cheaper now. Zeniths and other brands for the longest time have used not controls inside the TV, they are technician adjustments through a service menu only.

Apr 19, 2007 | Zenith C27A24T 27" TV

1 Answer

White Horizontal Lines near the top of my Screen

this symptom is what we called vertical fold-over. vertical fold-over is characterised by a white horizontal bar on the bottom or top of the raster due to the concentration or compression of the trace lines. it an image is present, the bottom or top portion is fold over. this is caused by a vertical deflection current with poor linearity, which compresses the trace lines at the bottom or top of the screen. this symptom is is caused by a defective sawtooth wave genetator circuit, or improper biasing or defective feedback circuit of the vertical drive or vertical output transistor/ic. the negative feedback circuit in vertical deflection circuit compensates for the linearity of the trace portion of the sawtooth wave. a decrease in the capacitance of the sawtooth generator capacitor is usually the trouble. but if you do not understand anything what i have written here, better bring it to a qualified tv technician for your own safety also. good luck!

Mar 01, 2007 | JVC TM-2703SU 27" TV

2 Answers

Horizontal roll on mitusbishi 35" tv

is this a horizontal black line going up or down? if yes, this sympton is caused by a trouble in the integrated circuit or in the vertical oscillator circuit. this symptons has 2 variations. one is the intermittent rolling of the picture. this referred to as the "loose vertical hold" the other variations is the continuous upward or downward rolling of the picture

Jan 15, 2007 | Mitsubishi CS-36509 TV

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