El Davicho
09-08-09, 03:31 PM
I've been trying forever to get this thing right, but I'm starting to feel like there is just no way to get consistant geometry on this thing. I find (using a cross hatch pattern) that it is either bowed a little in the center edges (horizontal) or the the top and bottom corners are curved a little. Also, the top right corner will always curve in if the top left is straight.
I've also noticed that if I've got a row of circles on the bottom of the screen, the circles are circular on the outside, but narrow a bit toward the center of the screen.
My question is, is it possible that these things are just flaws in the screen? Are these irregularities normal in CRT displays?
Gregg Loewen
09-08-09, 04:13 PM
normal in consumer crt devices...even after expert correction.
El Davicho
09-08-09, 04:26 PM
normal in consumer crt devices...even after expert correction.
Good to know. Any general advice as to what is important to get right? I'm guessing symetry should be priority?
Oh, and is it a good idea to have the same % overscan for the V and H?
I usually shrink the screen in a bit ( be careful as this can damage certain tubes) so I can see the edges of the raster: straighten things up and then ease it back out correcting as i go.
El Davicho
09-08-09, 06:56 PM
I usually shrink the screen in a bit ( be careful as this can damage certain tubes) so I can see the edges of the raster: straighten things up and then ease it back out correcting as i go.
Ooh...that can damage screens? In what way? I shrunk mine down pretty small to see how warped it gets on the edges...would I know if this messed things up?
I'm probaby just going to restore geometry to factory settings and focus on getting the overscan correct. My question is, in order to keep the geometry squared from the overscan adjusting, should I make the vertical and horizontal keep the same % overscan?
Ooh...that can damage screens? In what way? I shrunk mine down pretty small to see how warped it gets on the edges...would I know if this messed things up?
I'm probaby just going to restore geometry to factory settings and focus on getting the overscan correct. My question is, in order to keep the geometry squared from the overscan adjusting, should I make the vertical and horizontal keep the same % overscan?
yes ideally centre it up and make it the same all the way round I usually just use a ruler and a grid pattern but i usually minimise overscan anyway.
if you focus the guns too small it can trip out the shurtdown on some TVs. If the scan area is small the energy of the beam is concentrated in a smaller area and more likely to burn the tube. It will probably shut off before this happens but you may not be able to easily get the picture back.
El Davicho
09-09-09, 09:38 AM
OK, one more question and I can call it a day.
When I set overscan to about 2.5% on all sides, I find that my PS2 games (which are the primary purpose of this TV) goes to the edge vertically, but horizonally I have a good 1/2" or more of space on the sides. I would like it to fill the screen...if I bump up the H-Size to compensate do I have to do the same for the V-Size or will I be ok just adjusting the one axis?