Question about Sanyo DS31590 31" TV

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Vertical hold? my tv recently started having vertical hold issues.screen will fluctuate in size,spazing out for about 10 minutes,the settles leaving about 2" of black screen on top and bottom,does any know what i should be looking for,and where i can get a diagram for this model?is it cost effective to fix or should i junk it?

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Matt Loiselle

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Also, run thru the vert section with a soldering iron. Component freezing spray is a good troubleshooting too. Freezing the parts and checking the vert narrows your problem downto the individual component.

Posted on Jul 20, 2018

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marcial nasi

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Replaced this capacitors in vertical circuit.100 uf/50v,1uf/50v,1000 uf/25v,2.2uf/50v,47 uf/50v.this might not as exact as what is on ur tv.but, just replace those capacitors and see the result. hope this help u....

Posted on May 09, 2007

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1 Answer

What is wrong with my Sanyo TV?


T'Con board fault. Check and replace it. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience.
http://electro-medical.blogspot.com/
http://electronicshelponline.blogspot.com/
Faults & possible causes to LCD screen are given with illustrations. You can get an idea about the fault to an extent. Faults to all LCD screen are similar, irrespective of its brand and screen size.

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1 Answer

Image compresses to the middle of the screen after 20 minutes


This TV have problem in Vertical section, probably the capacitor or cold solder. by replacing the dried capacitor and resoldering the component will help to solve the problem.

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All of a sudden this TV has a problem of loosing voltage to the CRT and the screen suddenly goes black. After about 10 minutes the picture comes back. If you leave the set on for quite a while it seems...


You will have to tip the chassis up side down and look over most of the chassis close to the High Voltage Transformer (IFT) look for cold joints around there first, then locate the Vertical IC and look very closely at those pins, they usually have hair line stress ring cracks around them. If youv'e never done this type of work before I would take it in to a service co. It's not a major repair.

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1 Answer

TV picture goes out after 10 minutes of viewing with popping sound


It can be a couple things. Something bad on the power board. Or the vertical output circuit. How long ago did you purchase the television. Your best course of action is to have it serviced.
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1 Answer

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There's a known issue with this set due to defective rgb tubes...
See this forum:
http://www.hometheaterforum.com/htf/display-devices-tvs-projectors/105633-50-000-sony-
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In general, these problems are usually caused by leaky output filter capacitors in either the low voltage power supply or, depending upon the type of waviness you're attempting to describe, it could be in the vertical deflection circuits (either the vertical oscillator or vertical amplifier). I would estimate cost to repair from $200 to $350 dollars, depending on how long it takes to find the problem. It most likely though is a component issue in the circuitry.

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1 Answer

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