Recently my red convergence has become completely screwed. I have left/right adjustment, but no up/down. Blue is fine. I'm guessing, through reading through other answered posts, that it is an IC failure.
My question is: can i get away with only replacing one, as in, is there one of the two that governs the red only? Or am I best off just replacing both?
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Re: Which IC is for red convergence?
You need to replace both because they are both linked together with the green as each IC controls one color fully and half the green, so when one IC fails that places a strain on the other IC through the green, so that one will soon follow. You need two STK392-120 ICs and you will also need four 6.8 ohm 1 watt resistors. You can get replacement ICs and resistors at the following link with free installation instructions with pictures so you can do the repair yourself. Heres the link. http://servicemanuals.vstore.ca/
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Your tv has a problem with the convergence, adjust it using the original remote go to the setting's menu then go to the convergence section. Adjust the convergence color red and blue the green color is your guide you cannot move this green color, then you should move the red and the blue in all direction left to right, up and down. If you cannot move the red and the blue far enough the convergence IC is defective it must be replace in order to align this convergence. Feel free to send feed back good day and best regards.
does the blue convergence crosshairs move up and down left and right? Does the red move left or right. does the red move up at all. this might indicate a faullty resistor, bad ic or just bad convergence data. let me know i am here to help
go into convergence menu in customer menu--I do not care if you give me a vote or not--I am not here for that--I try to help people---in the customer menu if the convergence will not adjust in some direction---ie---red or blue will not either adjust up/down or left right--any one of these directions--you have a bad convergence IC
if i understand you right your blue convergence is off? and you have tried to go into the adjustment for the convergence? now do you crosshairs move up and down and left and right? on bpth red and blue. I see two possiblitys for this your convegence output ics commonly called stks or and you convergence ouput resistors. not a difficult repair for most shops and aroud 250 for parts and labor the ic run about 45 apeice
If the convergence is off more than 1/2 inch or so you can't adjust. you have a failure of hardware. most likely the output IC. This set has 2 outputs for convergence. Each output contains 3 circuits, Six circuits altogether 2 red ,2 blue and 2 green. The normal customer adjustment will only alow adjustment of blue and red. They should be converged onto the green. There is a much more complex adjustment in the service mode for Geometry and convergence. These adjustments are only needed when you replace a failed componnent like the output ic. These ICs have been upgraded several times since the production of this set. The latest and most powerfull version is STK394-160. If feel up to it I suggest changing both outputs and the corresponding output resistors. Then do a complete geometry and convergence alignment.
can you adjust any color of convergence in user menu blue, or red up or down left or right. if you can make any up or down left or right adjustments on any color then the likelihood it wont be a convergence ic. it would be a output resistor. so see if you can get any movement. with it being bowed i was suspect an convergence ic.