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I have Mitsubishi TV CS-31303. It has transient issues. At turn on, it shows horizontal fringes for some time along with picture, then single horizontal line only and then after some time finges at the 1/3rd bottom and then clear full picture. After some more time the clear picture turns into horizontal fringes at the bottom 3rd of the picture and picture rolls and then again the picture is very clear. Some one said that there is an issue in the signal PCB. Where is it and what componets are at fault. I do have service manual which shows circuit diagrams.
Your having trouble with the vertical sync/deflection circuitry. Probably a driver since it clears up after it gets warm. Could be as simple as a cold solder joint but it's not something you can do yourself unless your a tv repairman.
If you have a menu button on the front of your tv go into the closed caption portion and turn off the text mode . This will get your picture back . If you don't have a menu button on the front of your tv you will need a remote that can access the menu . Good luck
have a Mitsubishi TV 1993. Model CS-35301. The problem is that there is a white line that is running through a blank screen. The sound is fine just no picture. Have you heard of "Vertical Collapse?"
I would love to save the TV.
nothing to worry just minimise brightness to avoid screen burn.
means one bright hor.line in the middle of screen.
this problem can be solved
1 check vertical yoke connector or wire loose
2 check supply to vertical section which normally comes from EHT transformer
check components in vertical section or print loose
I suspect you originally had an intermittent solder connection on the convergence circuit board. This may have damaged the convergence IC's on that board by now if repairing those connections doesn't fix the set.