Convergence off on top and the 2 side right and left
Can anyone tell me whats wrong with my panasonic pt46wt49. how can i fix the convergence on the top and the right and left of the screen i have replaced the ics (stk392-110)both of them and also tried to adjust the convergence on the service mode but did not help. the convergence if only off about half inch from the top of the screen and half inch from both side on the top its green and on the side its red and blue.so what could be wrong do i need to replace any thing else in the set and how could tell if the resister is bad. please help
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Re: convergence off on top and the 2 side right and left
You need to check all the convergence resistors out of circuit 1 or 2 are most likely open and need to be replaced. You can get the service manual and free tech support at this link . http://servicemanuals.vstore.ca/
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You will need to replace your two convergence I.C.s.They are two large
IC mounted on a large aluminum heat sink.Replace both,look for any
burned resistors near them,replace those if needed,and readjust your
convergence. Good Luck
Does not sound like the chips are bad. What you need to adjust is "SKEW". You need to enter "service Mode" then go into "Coarse Convergence". Skew can be adjusted for all 3 colors. Unless you have the service manual, these corrections should not be attempted.
To clean the INSIDE of the screen, you really have to disassemble the TV. Remove all the screws that hold the "back" ( the piece with the mirror) to the front (screen) assembly. The screen can be cleaned with a solution of diluted isopropyl alcohol, no more than a 50% solution. Drugstores will carry it, but it might be 70%-90%. Just dilute with distilled water (not tap water as it contains minerals). Personally I have used 70% with no ill side effects but 50% is recommended.
Par 2 = " I do see the convergence chips..."
Par 3 = " I'm not sure where the IC's are...."
Please verify STK part # of IC's on large heatsinks.....
And then I'll give you step-by-step instructions......T.
try fixing the convergence 2 after your've aligned the convergence 1 - the second (accessed via the set up control) let's you adjust on 9 different axis to align the red and blue tubes to the green. you select which + sign you want to adust by pressing the corresponding number for the + ie 1 for the top left, and 9 for the lower right corner.
good luck (note - you cant change the green only the red and blue, if the whole edge is a mess try moving the image (you need to be in zoom mode, and then access the position adjustment via the pitcure set up screen.