Hi,
I just picked up this tv from someone who had Sony work on it and gave up. It had the bow-tie convergence problem, Replaced the convergence IC's and 5 amp fuse, and it works. When I push Flash Focus, it blinks for a second, no convergence pattern, basically it does nothing. Any ideas?
you need to get the convergence close, preform a factory convergence. here is an somthing that may help http://www.techlore.com/article/19631/Sony-Convergence-Procedure/
Hey zapdbf,
You taught me how to do this repair several months back on a 43", remember? I notice now very faint blue lines through the screen, hardly noticable, also two arced faint green top and bottom only in zoom mode I think. I read that there is a voltage adjustment somewhere behind the front speakers for the lines across the screen, what about the arcing green top and bottom, manual convergence? Also, what do you thinkl about this 57" widescreen?
zapdbf,
Also, the picture looks quite good, would that still be manual convergence keeping the FF from working?
Yes i remember, Hi
Yes, the flash focus uses the factory convergence as a pattern for the convergence, flash focus can only knows about the edges of the picture, there are sensors on the sides of the tv that can detect this, but it has no idea how the middle is converged. so it adjusts the picture by a complete lateral or vertical move. i have even seen flash focus make a picture worse if the factory convergence is off. Flash focus is not very smart. Manual is the best.
It sounds like your screens are too high, since you have worked on this set before i believe the crt's are ok. Just adjust the screen voltage remove the speaker grill, if it is the gray cabinet type it will either have three screws coming down each side on the back , or there will be screw covers at the bottom of the tv one screw on each side remove these screws, then remove the gray bezel, next there will be a black panel with several screws in it remove this panel and you will see a black box with 6 knobs on it, this controls the focus and screen for each tube. Tune the tv to an input that has no signal coming into it. then adjust the controls so you see the arched line, then back off of the control until the arched line disappears, do this for all three crt's. This will get the akb white balance set fairly well. Next tune the tv to a black and white picture and see if the image is a pure black and white image, if you can't find a black and white movie playing, turn you color all the way down and look at it as a black and white move and see if it looks good, also adjust your tent to the middle when doing this. If the black and white image looks good to you then you are done.