Actually Chuck, I think you're referring to a 19" LCD and Samsung makes a
couple of 19" LCDs - the 900-series (910 and 913) and the 190-series (192
and 193). The models vary a little in contrast ratio and brightness.
Jamie
Fort Myers, FL
-----Original Message-----
From: olympus-owner@xxxxxxxxxx [mailto:olympus-owner@xxxxxxxxxx] On Behalf
Of Chuck Norcutt
Sent: Thursday, December 01, 2005 4:05 PM
To: olympus@xxxxxxxxxx
Subject: [OM] Re: [OT] Help with monitor problem
Just to make it clear the Samsung SymcMaster 753DF is a flat screen CRT.
As best I can recall it's probably about 3 years old. Actually, I
just looked up the sales slip and see that my memory is not so good.
It's actually 4-1/2 years old which I guess is a bit past middle age for
a CRT monitor. Maybe it's a little tired. Certainly could have drifted
by now but I also think this problem has been there a long time. I
discovered it maybe a month after buying it and should have taken it
back but didn't. Maybe the problem is worse today and more noticeable.
I also just noticed that the horizontal size variation isn't as smooth
from center to edge as I thought. The maximum size (on the left side
only) is actually reached about 80% to the edge from the center. It
then begins to diminish again.
Anyhow, the monitor has all sorts of soft controls. I've tried all of
them (including degauss and vertical linearity in the geometry section)
No changes I could see but I think I should spend a bit more time with
the vertical linearity to see if I can correct the vertical size problem.
Monitor is running at 75Hz. One possible signal contamination problem
is that it's hooked up to an old A-B switch box. It's not really needed
any more and I should remove it but right now I'm not up to crawling
through the rat's nest of cables in the back.
Maybe it's time for a new Samsung 213T LCD monitor. Actually, I don't
need a screen quite that large. Is there a 219T? Tom? Jamie?
Chuck Norcutt
Jeff Keller wrote:
> Make sure that there aren't any power cords near the video cable or
wrapped
> around the monitor. The 60Hz can couple into the signal changing what you
> see. Also try changing your refresh rate setting. If it is 60 Hz coupling
> in, you should see the distortion change when the refresh rate is changed.
>
> It is very odd that the vertical size changes. If it is a CRT do you have
a
> deguass button?
>
> If you have an LCD with a digital connection option it should be much
better
> than the analog connection. (Sorry Bill, analog isn't always better) Also
a
> digitally created image (freecell) should show perfect geometry on a LCD
> screen with a digital connection. There is nothing to stretch.
>
> -jeff
>
> ----Original Message Follows----
> From: Chuck Norcutt <chucknorcutt@xxxxxxxxxxx>
>
> I
> I have a 17" Samsung SynMaster 753DF monitor and an NVIDIA GeForce2 Pro
> display adapter. The monitor produces a stable image with good color
> and contrast but has always exhibited a problem wherein the horizontal
> size of the image varies with horizontal placement on the screen. It's
> normally not a problem and generally not noticeable unless looking at
> detailed, rectangular things like architectural images.
>
> snip
>
> From my limited
> knowledge of such things I assume the hozizontal oscillator is changing
> frequency as it moves across the screen.
>
> Surprisingly, I just now noticed (by measurement and not by eye) that
> there is a similar problem in the vertical axis but this problem is not
> symmetrical about the center. Cards at the very top of the screen are
> 16mm tall and only 14mm tall at the bottom of the screen.
>
> I just went to examine the monitor on my wife's computer (even cheaper
> stuff than my cheap stuff) and see that the horizontal size problem is
> there as well and even more exaggerated. The vertical size, however, is
> consistent from top to bottom.
>
>
> Chuck Norcutt
>
>
>
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