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He's referring to convergence.
"Chip" wrote in message om... This is the first I have heard about the TV sets needing to be refocused. |
"JDeats" wrote in message m... Convergence/Focus is something has has to be adjusted regularly on all CRT based rear-projection sets. It isn't difficult to do (the owners manual will explain the process quite well), it's just a little time consuming. Generally speaking, the more points of convergence a set has the more acurate it can be focused. For example almost all Mitsubishi's offer 90-point convergence tweaking outside the service menu (this means you'll have 90 points to test and correct if you discover color problems), other brands generally offer less (e.g. JVC and RCA typically offer only 9-point convergence outside their service menu). Some manufactuers (Sony, Hitachi, Toshiba, to name a few) offer auto focus on some of their models which do an alright job, but they all require manual fine tuning if you want the absolute best quality picture the set is capable of. I talk about convergence tweaking a bit in my buyers faq: http://hdtv.0catch.com Just a correction Focus and convergence are two separate issues. Focus is a professional adjustment to make sure that painted electron beam dot each CRT is as tight and symmetrical as possible. Convergence is aligning those 3 dots from each tube so their optical outputs land precisely on top of each other. Very few sets offer user adjustment of focus. |
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