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Retarce line sansui tv retarce line on screen

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Diagonal retrace lines at the top are usually the result of bad electrolytic capacitors in the vertical deflection circuit most vert. deflection circuits derive operating B+ from a horizontal flyback transformer winding rectified & filtered usually around 24 volts the electrolytic capacitor on this supply loses capacity or may totally go open causing the retrace lines,sometimes other electro. caps in the vert circuit can cause this too, depending on the age of the tv you may find multiple substandard electrolytic caps it's best to test all for capacity & esr. Without knowing more details about your tv brand,model and/or chassis i can't help further.

Posted on Apr 27, 2014

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Posted on Jan 02, 2017

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1 Answer

Vertical line in my 32 inch Sansui flat screen in my REV motorhome. Left side of TV. Bluish in color


If you wish to get some details; check the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/
Line faults & possible causes to LCD & Plasma screen are given with illustrations. You can get an idea about the fault to an extent. Faults to all LCD & Plasma screen are similar, irrespective of its brand and screen size.

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Fault finding retrace line on screen ?


Check the video output supply voltage. If it is less than normal, retrace lines will be visible. If the screen voltage is greater than normal, the retrace lines will be visible. You should check all these. If you wish to get some details; check the site linked here. Viewing it in "Mosaic" will make surf easy. Surf the site with patience. Pull up older posts. Surf the site with patience.
http://electronicshelponline.blogspot.com/
Check these above said voltages at the CRT base card.

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1 Answer

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The problem is vertical failure. Vertical output section to your TV ahs the fault. You ahve to check the vertcial output circuit for any component failure or loose solderings.

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Dear Sir,will you be pls to get me the circuit diagram for 34" color tv SVT3"4 ...2003 MODEL pls help


Hello wilson_deniz,

Welcome, and thank you for using FixYa!

The maunals you seek can be found at the link I have included below. But you will have to locate your Model Number on the back of the TV. The manuals also cose $4.99 each.

Sansui Manual

http://www.sansui.owner-manuals.com/SANSUI-manuals-6-20a.html

Small price to pay if it helps you fix the TV.

Have a great day!

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vertical line = bad horizontal output transistior
horizontal line = bad vertical output transistor

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It could be a bad panel, best thing to do is return it and get a new one. Julio milleniumtvsvc@gmail.com

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