I'm pretty used to tweaking my Mitusbishi ws-55315, and have messed around with grayscale, overscan, geometry, focus, etc., but one thing I'm not clear on is how to work with the edge focus. It's not bad and it may just be at the limit of what the set is capable of. Anyone have any advice, or have you noticed a falling off of light output and focus at very edge of the screen? Is it just endemic?

And also, I have physically focused the lenses, so what is the point of the electronic focus knobs?

Any help would be appreciated.

I am having the same issue, thank goodness for extended warranty. They have already come out to replace the green picture tube, that did nothing, they are coming back again to look at it next week. Quick question, does focus seem to be getting worse w/ age, because I dont remember it being this bad(convergance lines being so wide). There has to be a fix.I will keep you posted if they come up w/ a solution.

I'm pretty used to tweaking my Mitusbishi ws-55315, and have messed around with grayscale, overscan, geometry, focus, etc., but one thing I'm not clear on is how to work with the edge focus. It's not bad and it may just be at the limit of what the set is capable of. Anyone have any advice, or have you noticed a falling off of light output and focus at very edge of the screen? Is it just endemic?

And also, I have physically focused the lenses, so what is the point of the electronic focus knobs?

Welcome to the forums. You might find this link (//www.keohi.com/keohihdtv/brandspecific/philips/philips_tips.html), which offers servicing tips for some Philips models useful, and likely there are similar sections there for Mits RPTVs. See the large Mits tips sections here, too. The separate beam/astigmatism and electrical focus sections deals with the focus and shape of the electron beams inside the CRTs. Lens focus deals with optically transferring images on CRT phosphors to the mirror, then screen. The beam-shape adjustments help determine how small the three beam spots are (using a crosshatch/dot test pattern).

Find the scan lines once visible on my year-2000 Philips 64PH9905 are no longer visible up close, suggesting they're now overlapping. Yet test pattern images are still sharp, and crosshatch patterns are sharp to the edges of a 64" screen. Seems you'd want the convergence good near the edges first, without decreasing the overscan too much. So, tracking down beam shape and electrical focus adjustments for your model might help there. While cleaning my optics last summer I found the electrical focus and lens adjustments have a very narrow range and didn't improve sharpness. Haven't tried beam/astigmatism adjustments yet. -- John

they now replaced the "focus" module. tv is now worse then it has ever been. Retailer just submitted for replacement. I will be glad to get rid of this POS!