So I should or shouldn't touch the vsc? I thought that one should be adjusted as well as yrr?
I'm mostly just squeamish about adjusting anything on the power board, both the vsc and yrr are apparently on the y sustain board right?
For anybody feeling hesitant, I have no regrets about making the adjustment. The small inconvenience of needing to go in and do it again is easily offset by the past 2 years of noticeably better contrast on my display. And when they do eventually start appearing, the pixel misfires aren't terribly distracting. Even now they only happen on very specific content, and I'm the only one that seems to notice them.
Quick questions for you. When you said this, "Firmware version will not matter. First try lowering Vs (ccw) as far as it will go which is around 195V and see I'd that gives more adjustment room for Yrr. You can also raise Ysc from -190 to -180 (approx). Do not adjust Va or Ve.", how did you arrive at those voltages? Were you looking at the screen looking for misfires or did you just max the pots as far as they would go? Or just something else?
Thanks for this great thread!
Or, when you say Vs as far as it will go, do you literally mean just turn down the pot on Vs as far as it will go?
I looked for misfires on the white and black screens, along with the green. On the white screen, the purple dots/bloom came up in the center bottom and grew from there. So I just dialed it back until I was barely getting any purple misfires. Then I used the AVS calibration disk here to set my black levels (we had been running brightness way too high for nighttime viewing).
Can't say it was really worth it for our situation as far as blacks vs hassle & risk go, but, it is now off my mind as something to try. Those with sets that have much lower hours and are willing should try it, it was really that hard at all. Just be OCD about what you're doing so you don't screw anything up.
Edit: Mob-Rules: It doesn't appear to have the tweaks:
The thread creator/op might have a better idea of that though.
I opened my pn51F5500. It has the vscan pot, vs adj, and va adj. Although I found the sector for Yrr I saw no pot. I have ordered the Service Manual anyway to see if by lowering the voltage I can squeeze out some darker blacks or adjust the yrr electronically.
Did you try to tweak your TV? If you did what are the results?
I am thinking of tweaking my pn60f5570 which is the same model but for European market (and size 60" pentile).
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