alexpio :
Thank you guys for your concern about dealing with high voltage, but I'm pretty familiar with it ( I used to play with Tesla coils). My problem is that I still don't know how to remove the board because that wire is holding it in. Meanwhile I did some research online, and I found out that my problem could be more about adjusting geometry than others. I was able to access the service menu with the remote, and more specifically the PJE menu, where 2 grids showed up with white and green colors. From my understanding, they should be perfectly aligned. Usually the green grid is perfectly square when there's a color convergence problem. In my case the white grid is perfectly square, while the green grid matches perfectly the white grid in the center, but curves toward the top right and left angles in the top part, and curves toward the lower right and left angles in the bottom part. Anyone knows if I can align the 2 grids with the remote? Any other suggestion will be greatly appreciated. Thanks to all.
1st the problem to remove the terminal from the fly back is because is firmly attached to it you better follow the wire & find out it goes to a square box called high voltage divider when you find it push the wire to get deeper in to the box at the time you twist it CCW then pull it has to be released but some times takes some trys to do it right make sure do not pulled extremely hard because it can brake de the bell shape terminal at the end of the wire even when is not vital it will prevent the terminal from coming out by itself.
A word about high voltage. in this kind of TV the CRT construction prevent the CRT from holding charge for to long ( no more than a few seconds) but just a precaution make sure to have the TV removed from the AC line. then you can be sure it won't represent any risk.
About the convergence adjustment.
if you have no experience it can be painful, time consuming & frustrating try to adjust this unit because you may and with the TV in worst condition than originally,
step 1 make sure that the auto focus when is done move the red, green & blue cross around that means basically that the system has control over the position of the picture other ways you will only be wasting your time & your problem relay someplace else.
2.- check that you have at least one color (green, blue or red) geometrically good that will be your base color usually the green is it that is the case DO NOT TRY TO ADJUST THAT COLOR AS LONG IS GEOMETRICALY ACCEPTABLE. get into the convergence adjustment double check for the center of the screen that match the center rectangle then moving from the center to the edges adjust only vertical line that cross the center then do the same with the main horizontal line that cross the center then returning to the center adjust the convergence in going in concentric squares sequentially til rich the edge.
If you do not have a good base color or you make the mistake to try to adjust all... good luck. I have 30 years experience & if you do that you will face the hell trying to bring them back, it that is the case you better pay a professional tech to do it.
BMTV Service
Facebook
Twitter