Question about Televison & Video
The tube has about 5 inches of no picture but the rest of the picture is fine when I tap the main pcb heat =sink, it gets a little better please help!!!
Maybe you have a cold solder joint in your TV set in the vertical deflection circuit. Check for loose components or bad solder spot in that area. Also check the vertical size trimpot that may be dirty or with a rusted cursor(use contact cleaner spray to clean it and rotate a bit its cursor from one side to the other and see if you have the image increasing its size again.
Hope it helps!
Miguel Luiz Martins
Posted on Nov 29, 2013
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Posted on Jan 02, 2017
SOURCE: Sound but no picture
A white like across the screen means that the vertical circuit has stopped working. Look for a small fuse that looks like a resistor near the vertical output IC, replace that fuse if open and resolder the pins on the vertical output IC.
Posted on Jul 08, 2007
HELOO THE SET IS HAVINGA VERTICAL FAILURE ,REPLACE THE CONDENSERS AND ANY BURN PARST IN VERTICAL SECTION.AND AT LAST REPLACE VERTICAL IC IT WILL BE OKKK.
Posted on May 22, 2008
SOURCE: sony 32 inch crt tv
On the neck of the picture tube you will see the large yoke. Loosen the srew slightly and just rotate the yoke assembly very little counterclockwise. That should correct your problem.
Posted on Oct 13, 2008
This is an easy repair if you've ever soldered and would not be too costly for a repair shop to do it for you. The problem is a bad Vertical Output IC (usually mounted on an aluminum heat sink with the part on it labeled LA78?? ) and 1 or 2 bad capacitors. Some times you can even fix the problem by re-soldering the contacts of the IC- To find the IC follow the 4 wires that come from the Yoke (which is a contained coil of wires slipped over the neck of the picture tube(s)) back to the board. 2 of the wires go to the horizontal o/p and 2 to the Vertical o/p the thinner gauge wires are for the vertical. Be sure to vote/rate me if this helped Thanks!
Posted on Oct 19, 2009
Testimonial: "Thanks for your sage advise. I will get it repaired."
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