FD Trinitron Questions

[SDevil33]

Are all Trinitron monitors fuzzy with text around the outside? Is there any way to remedy this, using setting changes or something like that? Will KDS refund my monitor or only replace it with the same model? Also, I ordered my KDS AV-195TF from Onvia before they changed to inpower. Will Onvia still take my monitor back and refund it or replace it with a different monitor made by Samsung or Viewsonic? Thanks for your input.

-Sundevil33-

 

[MinniePin]

>>Are all Trinitron monitors fuzzy with text around the outside?
no. it shouldn't be. every Trinitron I've worked with is nice & clear. exception of few that was defective. I can't tell you the return policy for Onvia as I've never returned anything to them.

good luck

 

[Ronstang]

I had 3 KDS AV 195TF's. Every one of them had bad geometry along with fuzzy text on the outside. Flat monitors are harder to focus on the edges of the screens because the screen is farther away from the color guns than in the middle of the sreen. But good electronics should remedy this. I don't know if KDS has the good electronics because All 3 of mine were bad.

If you read Onvia's return policy it states that it will not take ANY monitors back, you must deal with monitor problems directly with the manufacturer. If your concern is the fuzzy text on the outside edges then you might be out of luck with KDS also.......read your manual......if I remember correctly is states that a SLIGHTLY out of focus condition occurs normally at the edges of the screen. I guess it really depends upon their idea o slightly.

 

[Nih]

got a viewsonic EF70 myself, I don't see any blurryness at all. But a very small geometry problem does exist.

 

[Biggs]

Well sometimes you get lucky and get a Trinitron that has a more "tolerable" fuzzy edges/text thingy. Just like a processor where some overclock far more than others.

 

[hadoken]

That is not normal. Trinitrons do get really dark as they get old tho.

 

[hans007]

on an FD trinitron you should expect some geometry problems in the corners. I'm on an av195tf right now, and text is prefect. I'm on a matrox g400 though, maybe its your vid card. My av195tf (a refurbished one at that, upgraded from my broken vs19sn) is great up to 1920x1440@60hz, but i run it at 1600x1200@85hz.

 

[Gosharkss]

Fuzzy text as you describe it is most likely not a picture tube issue. Focus falling off in the corners is a common on all picture tubes and is more likely to be a convergence problem. If it is a convergence problem, check your user manual and see if your monitor has convergence controls. Go to the following web site http://www.csf.org.uk here you will find a monitor test pattern program that may help you align your convergence.

Miss-convergence has a direct effect on the monitor's apparent focus. Unfortunately, convergence is a spec that few manufacturers publish.

There is a reason that the original televisions had almost round picture tubes and that today the IMAX theaters use a domed screen. In general it is easier keep focus and convergence consistent if you project a beam onto the inside of a curved surface. Almost every monitor has better focus in the center of the screen than at the edges. This is because the beam is at right angles to the screen. The trick is to keep focus uniformly good over the entire screen. This is also why almost all-flat screen monitors are curved on the inside.

Try this experiment. Take a flashlight and aim it straight at a wall you will see the spot the beam creates is sharp and round. Now aim the flashlight up into the corner of the wall. You will see the beam shape change to a more oval shape and spread out. In general terms this is what's happening in your CRT monitor. The flatter the surface the more the beam spreads out or defocuses. Now imagine that you are in an IMAX domed theater. If you shine the flashlight at any portion of the inside of the dome, the beam shape and size stays much more consistently focused.

Yes manufacturers have developed technology (dynamic focus circuits, etc.) that does a good job at improving beam shape and size in the corners of the screen. However no circuit or technique can make the beam 100% accurate.

 

[Strych9]

I had Onvia take back a defective Sony monitor not too long ago without any problems. Give it a try.