source or tv? reference image isnt full on 30XS955

[jeri534]

so Im trying to fix my overscan issue and Im using a scaling picture, but even when I squeeze the picture to where I can see its past the overscan the picture isnt complete...heres a picture

http://home.comcast.net/~teh534/overscan.jpg

[Myke256]

That's what it's supposed to look like. Now you need to align the picture so the red part is on the edge of the monitor all the way around

[jeri534]

On the on the source image it shows the arrows...on the left and right

http://www.tigerdave.com/images/testpatterns/1920x1080_overscan.gif

[kny3twalker]

do you need a better picture? cause that looks really underscanned

you do not want the overscan less than 5%

[jeri534]

I know, I did that to show that its clearly not showing the whole picture.

If you see the picture posted above yours you can see that it shows all 4 points of the arrows, but my TV does not..is that normal for a tv to do that? Shouldnt it show it just like the picture I posted?

[DSperber]

Adjusting overscan really has two components: (1) horizontal and vertical size and position of the "background raster" onto which the image will be overlaid, and (2) horizontal and vertical size and position of the image on top of that background raster, spreading it and sliding it so that the image completely fills the background raster. So BOTH the background raster and image on top of it must be positioned and sized identically to maximize and optimize screen usage and also accomplish the target overscan value.

I feel you should adjust the background first, and the foreground image second, although I admit it's a tough task dealing with the first before the second is also adjusted. So, you will inevitably go through several iterations and cycles of adjustment to both parts, before you find the sweet spot. Believing the background is good and moving on to the image, you may then find when you come back to the background that some revisions are needed. Then you return to the image, and now need to tweak it as well. Etc., etc. Perfectly normal process.

Yes, a bit complex, but with a decent test pattern and some patience, tweaking the right TWO sets of service menu items will get you where you want to be. You need to sort of "slide things around and resize as needed", until you see the uniformity and approximate overscan percentage (around all four edges) that you're shooting for. 0% overscan is generally unwise on a CRT, but 1-2% is fine and does not eliminate too much picture real estate so that score bars, crawls, etc. are cropped. But it's really up to your taste, as long as you don't crop too much (eliminating lots of genuine content) or too little (allowing digital video noise to be seen around one or more of the edges).

Check this (http://www.avsforum.com/avs-vb/showthread.php?p=6723557&&#post6723557) post, and the referenced imedded post links, for detailed instructions on how to do this. Also it includes another test pattern (overscan.zip) for you to try which does not have the nice coloring of your pictured pattern but can also serve as an excellent convergence and H/V linearity reference. Eventually you will work your way down to this post (http://www.avsforum.com/avs-vb/showthread.php?p=6346890&&#post6346890) which provides the step-by-step for using the 2170D-1, 2170D-2 and MID3 service menu items to do the job.

The important trick is to click the relevant service menu items just one unit at a time while you're watching carefully, to gauge its effect and to see if that particular item's adjustment is still needed or not, or is still inadequate or is now excessive. Then, when you're temporarily satisfied with that one, you should adjust its "opposite" (i.e. affecting the opposite edge). This "adjustment in opposing pairs" technique will allow you to easily see when one adjustment has impacted its opposite and take immediate corrective action on the original item, while your brain is fully concentrating on that particular horizontal or vertical component of the size/position process.

And, even when you think you're finished, it's a good idea to go back and revisit all the items again, and click them up or down one unit just to be sure you've really found the optimal combination of all settings and haven't accidentally loused up an earlier one you thought was good by a later adjustment to something else. When you're done, even one click up or down for any item will have an obvious and visible negative effect (to your eye) on the test pattern's appearance (though it may be tiny, since this is only a one unit click). There will be some cropping, or asymmetrical appearance, that will tell you you've just broken something and that the original setting was indeed ideal.

[jeri534]

The second link you posted showed this

Once at MID3, you use 0 (VDHP horizontal position), 1 (VDHS horizontal size), 2 (VDVE vertical position) and 3 (VDVS vertical size) to manipulate the "image" on top of the "background" (i.e. within the "background raster"). Again, use 3/6 buttons to adjust one unit at a time up or down and watch what happens on the screen. It will be obvious what you're doing and what effect you're having.


But in my MID3 I dont have those values to change....

[nick2003]

If your not seeing the same thing on your HD Cable or DVD's then this is the fault of the computers video settings and not the tv, look in your video card settings for overscan adjustment and also set a custom resolution that fits the tv perfectly in powerstrip. Theres also overscan controls in powerstrip but you'll need to do the top and bottom of the screen in your video card settings cause i don't think powerstrip will adjust that just the sides. And like DSperber said the background raster is whats causing the arrows to disapear. If you can't find the settings in MID3 you might half to try a couple clicks in each entry and move it back to the default if it doesn't do anything and if your not 100% that you've got it right then just shut the tv off and back on without saving.

[SurfingMatt27]

[QUOTE=kny3twalker]do you need a better picture? cause that looks really underscanned

you do not want the overscan less than 5%[/QUOTE]

Agreed, the overscan is there for a reason if i were you i would leave it alone since if you fiddle with it you will ruin your stretchmodes.

You want to keep it at 5% anyways since overscan is needed to hide flaws that your not supposed to see in some material.

Mine came out of the fatcory with perfect 5% overscan, all i had to do was position the picture using HPOS and now the picture is perfectly in place.

You also don't want to mess with overscan because it makes letterboxed material more smaller.