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- Path: sparky!uunet!stan!not-for-mail
- From: kucharsk@solbourne.com (William Kucharski)
- Newsgroups: rec.video
- Subject: Sony: Geometric Distortion and other tradeoffs...
- Date: 28 Jan 1993 18:38:03 -0700
- Organization: Solbourne Computer, Inc., Longmont, CO
- Lines: 66
- Distribution: na
- Message-ID: <1ka1prINNncq@anthrax.solbourne.com>
- References: <199301272036.AA22307@europa.eng.gtefsd.com> <1993Jan27.225730.1302@cmkrnl.com>
- NNTP-Posting-Host: anthrax-fddi.solbourne.com
-
- While reading article <1993Jan27.225730.1302@cmkrnl.com>, I noticed that
- jeh@cmkrnl.com said the following:
- >There are adjustments in the "service menu" for pincushion distortion in
- >*vertical* lines (imagine the above illustration, NOT turned on its side), but
- >in horizontal lines it is corrected by moving these funny little permanent
- >magnets around on the back of the CRT. Moving these magnets also affects
- >convergence. The trouble with that tradeoff is that you'll notice convergence
- >errors all the time.
-
- Yes, yes!! I went through this same brain damage when I bought my 27XBR15. I
- went through two sets, up and down my apartment stairs, before realizing that
- I should try them (three more!) out in the store first.
-
- The two major problems:
-
- 1) Out of five sets, the picture on four was rotated more than two or
- three degrees (e.g. the yoke wasn't quite straight).
-
- 2) Out of five sets, all five experienced the distortion of horizontal
- lines at the corners of the screen. I had an actual Sony factory
- service person work on it, but he never did get the lines straight
- (the best he got was sort of a __---__ in the corners where the "---"
- was where the magnet was) and the convergence was so horridly off that
- I exchanged that one for yet another new one.
-
- Finally, I just set up two or three in the store (a high-end audio/video
- dealer, that's why they were willing to put up with all this) and picked
- the "best" one.
-
- BTW, the horizontal curve definitely IS caused by varying magnetic
- fields, as they exhibited a slightly different amount of bend in place
- in my apartment than they did on my dealer's floor.
-
- Other notes:
-
- 1) I also looked at a Proton; it was skewed (rotated yoke) and also
- exhibited slight geometric distortion (though not as much as any
- of the XBRs).
-
- 2) The Sony 25" XBR Pro Monitor (~$1500 for monitor ONLY) seemed to
- get it right, but it was only 25" and I wanted a 27" set.
-
- 3) Ever since I became sensitized I haven't seen a major maker of large
- sets that hasn't exhibited the rotated yoke/picture or geometric
- distortion problems or both on sets I've seen on display. This
- includes Proton, RCA ("normal" and "ProScan"), NAD, Mitsubishi and
- Panasonic (including the GA00 sets).
-
- I talked to the Sony tech about this and he said that ALL monitors have this
- problem, and perhaps that's true, as even the 19" Color Trinitron monitor
- I'm currently viewing has some problems along these lines. I eventually
- went with the Sony anyway as it had the best picture, the features I wanted
- (PIP and Channel Scan), and most importantly of all, Remote Service Mode so
- I could adjust overscan myself.
-
- Would I purchase another Sony? Yes. The picture is great, and, unfortunately,
- none of the other television manufacturers I've seen have it right either. And
- none of the other brands have the Remote Service Mode so you don't either have
- to wait around all day for the service tech (who usually knows less about your
- set than you do) or muck with pots located (seemingly) a few millimeters from
- the flyback.
- --
- | William Kucharski, Solbourne Computer, Inc. | Opinions expressed herein
- | Internet: kucharsk@solbourne.com Ham: N0OKQ | are MINE alone, NOT those
- | Snail Mail: 1900 Pike Road, Longmont, CO 80501 | of Solbourne Computer, Inc.
- | President, "Just the Ten of Us" Fan Club | "Dittos from Longmont, CO"
-