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Have single horizontal line on 36" sanyo crt. believe vertical control circuit. what are common problems that i can check?

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This is usually a failure of the vertical IC. This should be a small flat IC attached to a heatsink and may be marked LA7837 or something similar. If you can solder, try resoldering the pins first as poor connections can cause this as well. If that fails to resolve the problem, replace the IC.

Dan

Posted on Jul 14, 2008

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Check vertical output circuits. They control the up and down deflection and when not working you get straight line across front of tube.

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Horizontal line fault to CRT based TVs are given.

Oct 06, 2014 | Televison & Video

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After power on the screen goes very bright(white) and then immediately reduces to a single horizontal line and powers off within 3 secs


This is a problem with the vertical circuit and can be as simple as poor connections at the vertical IC or a defective IC. Expect a parts cost in the $25 range for this repair.

Dan

Aug 14, 2010 | Sony FD Trinitron WEGA KD-36FS130 36" TV

1 Answer

Picture go into a thin line.


You have a thin horizontal line in the center of the TV. You, in this case have vertical IC that has bad grounds. Resolder the vertical IC pins and check the capacitors in the immediate area and replace these caps as necessary. If you still have a horizontal line, you will have to replace the vertical IC. Find a TV tech or someone with electronic experience to do this for you. Should be reasonable to fix. Thanks for asking and Good Luck!

May 30, 2010 | Sanyo AVM-3659S 36" TV

2 Answers

Vertical line in center


If the line is "vertical" then the vertical circuit sounds OK. The problem would be in the horizontal deflection.

Check yoke connection and solder around horz defl circuit.

If the line is horizontal then I would suspect the vertical IC.

Apr 02, 2009 | Sanyo DS31520 31" TV

2 Answers

The screen just shows a single line in the center from top to bot


vertical deflection failure. either solder on vertical ic, or bad capacitors in vertical circuit, and bad resistor &or ic failure. we fix these in home for 150.00 including 1-year warranty and trip. (oh plus tax for the next stimulus) mch

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1 Answer

I have a KV27FS210 sony wega trinitron tv. It turns on and has a single horizontal line across the center of the screen then buzzes shows a continuous zigzag line from the top to bottom of the screen with...


The single horizontal line is a problem with the vertical circuit. Look for a small flat id attached to a heatsink that should be marked LA7837 or something similar. Try resoldering the pins of this IC first. If that does not resolve it, replace the IC.

Keep us posted.

Dan

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2 Answers

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Your vertical deflection IC is bad.

Nov 04, 2008 | Televison & Video

1 Answer

Single Horizontal line


The vertical IC has failed. Open up the back and look for a small flat IC attached to a heatsink. It should have about 11 pins or so and be marled LA3847 or something similar. First try resoldering the pins as it is common for the connections here to go bad. If that fails to resolve the problem, replace the IC.

Keep us posted.
Dan

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1 Answer

Horizontal Line


A LINE left / right thru the middle ( horiz line) indicates a problem in the vertical circuit.First step is to solder the pins of vertical o/p
IC.........Next, troubleshoot vertical circuit to look for problem...T.

Please rate solution................................

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