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How to fix vertical section defect on CRT TV

There is clear picture on bottom half of screen but there is only retrace lines on top half of screen - no picture

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If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/

Posted on Apr 08, 2015

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1 Answer

Daewoo dtq-206sc have retrace lines


if retrace lines at top of picture the issue is in the vertical circuit--usually a bad filter cap and or the output chip (most of the caps that cause that are 220 uf or 330 uf and connected directly to one pin on the chip.

If retrace lines are across entire screen---likely the master screen control on the Flyback is set too high--causes excessive brightness and the retrace lines.

May 22, 2012 | Daewoo DTQ-20U6SC 20" TV

1 Answer

White horizontal lines on top of screen


Replace all the electrolytic capacitors in the vertical output section circuit. There will be 5 or 6 of them. Replace the at one time. The fault you see is technically called " vertical retrace lies".

Apr 28, 2012 | RCA 27F524T 27 inch TV

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RCA 24V511T Vertical problem


There is a problem with the vertical circuit. In many cases this is either poor solder connections or a defecitve vertical IC. If you can solder you should be able to fix this yourself. Please note that there are potentially dangerous high voltages present inside the set even when unplugged. Let me know if you wish to attempt the repair and I'll provide additional details and instructions.

Thanks,
Dan

Jan 30, 2009 | RCA 24V511T 24" TV

1 Answer

Half screen showing


ok
keep tv off.
it will only get wors
if sumon dosent work on it soon
the problem you are having in the vertical section of the tv
hav a repairman resolider all conection on the vertical IC and check the serounding componets for falts.

regards daniel.
PS the repair takes me about 15 min.

Jan 13, 2009 | Samsung TXG2746 27" TV

1 Answer

CRT TV with a white line half way up the screen


Hello,

The white line is result of a Vertical failure. Believe it or not, the whole picture is contained in that one white line, but it is not spread out from top to bottom on the screen.

Usually, a vertical failure is IC or capacitor related. Should be an easy, fairly inexpensive fix for a competent repair shop.

Hope this helps you...

Jan 05, 2009 | Televison & Video

1 Answer

RCA tv model F32649 white horizontal lines


the problem of your tv is in vertical section, to be sure change all the capacitor in vertical section.

Sep 27, 2008 | RCA F32649 32" TV

1 Answer

Shrinking screen.


hi there, you do have a vertical section problem and at the power supply section problem. do some test, check for some cold solder at the power supply section, test some electrolytic capacitor at the vertical section. ty

Jan 01, 2008 | Televison & Video

2 Answers

Can only see half the picture


Locate Vertical Output device--replace w/OEM equiv.or better.

Oct 10, 2007 | RCA TruFlat 27F520T 27" TV

1 Answer

Double picture


your problem is in vertical section. 1 any capacitor in vertical section is defective. 2 transistors in output ckt might be defective 3 loose contact in vertical section. 4 problem in feed back circuit(if you are a technical person )

Sep 14, 2007 | Emerson EWF2704 TV

1 Answer

TV Problem


No. Are the lines white or black? Does the picture look distorted at the top? Is there a chance it is still under warranty? It sounds like a problem in the vertical retrace circuit. Probably a capacitor near an IC that's used for timing. You shouldn't be having this issue already. A tech should be able to see a distorted waveform in the vertical section. Hope this helps.

Nov 11, 2006 | Philips 32PT5441/37 32" TV

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