Originally Posted by Gecko85
I have a question about adjusting the screen. The left side of the picture is cut off a bit. Happens on all devices (Tivo, Apple TV, etc.)
On my Sony, though, the left side of the screen starts right up against the left-most boxes, actually cutting part of them off (including cutting off the first part of the "R" in the word "Rented" at the top...)
I've gone into the service menu and tried adjusting HPOS and HSIZ (both of which are in CXA2170D-2) to no avail. HPOS moves the entire picture left or right, but doesn't reveal the cut off part on the left. Everything, cut off and all, just shifts to the right. HSIZ stretches the existing picture in or out, but also doesn't reveal the part that's being cut off.
I'm sure there's a setting in there somewhere to shift the actual content over to the right, revealing the part that's currently cut off, but I don't know what that would be.
The real discussion on "tweaks" can be found in the main thread on "Sony Service Codes"
. Of course that's got about 3000 posts starting back in 2005. So it will take a little searching and reading to find what you want.
But here is a quote from one of my own posts in that thread
, on the subject of your question... namely how to adjust the picture so that it has the correct height and width, as well as being centered properly on the screen.
The key is that there are TWO sets of controls, much like you have in Photoshop.
- You adjust the "possible maximum image size", both horizontally and vertically, by increasing the "canvas size" (which is like the background on top of which the actual image is then presented) to fill the screen. This uses VPOS and VSIZ in 2170D-1, and HPOS and HSIZ in 2170D-2.
- Then you play with the "actual image size" presented on top of the "canvas". This uses VDHP, VDHS, VDVE and VDVS in the MID3 group.
Assuming you're into the service menu (and are familiar with how it is entered, used, saved, and exited), the primary recipe approach i
kd-34xbr960.zip 33k .zip file
s fundamentally twofold: (1) use the VPOS and VSIZ items in the 2170D-1 group, and the HPOS and HSIZ items in the 2170D-2 service menu group, to adjust the "background raster" (aka "canvas") in both horizontal and vertical directions. Then (2) in the MID3 group you use 0 (VDHP horizontal position), 1 (VDHS horizontal size), 2 (VDVE vertical position) and 3 (VDVS vertical size) to manipulate the 1080i/720p "image" on top of the "background" (i.e. within the "background raster").
2170D-1 and 2170D-2 are used to adjust the "canvas" to reach to the physical edges of the screen, so that the image then placed on top of it can utilize all available screen real estate. MID3 is used for the 1080i and 720p image size and placement adjustments, within the background raster area set by 2170D-1 and 2170D-2. You position and size the image over the background so that it is fully visible and reaches to the extreme edges of the background for 0% overscan. Then you enlarge it just a bit more in all four directions (using the test pattern on your screen as the guide) to "crop" out the video noise which you may see at 0% overscan, losing perhaps 1-2% of the image in this final "overscan" adjustment.
As you get into each part of the adjustments, clicking up or down one unit at a time so that you see the precise results of your tweak, you focus on getting the extreme outer edge of the test pattern rectangle visible on your screen. When you're done (at 0% overscan), the complete rectangle should be totally visible on all four sides. No wasted screen, and nothing eliminated (at 0% overscan).
There is an assumption that you have a proper 16:9 overscan test pattern on your screen, the best of which can be found attached to this post
which if you can connect your PC to your HDTV is ideal. If you have a video card like ATI Radeon 9800 Pro, it has a second DVI head and you can connect it to your Sony with a DVI-to-HDMI cable setup. Or, you can get the ATI DVI-to-component adapter and connect the second head to your Sony with component video cables.
Otherwise, you can use Avia or DVE DVD's to display geometry and overscan test patterns, though at 480p. Using DVE, you can go to Title 12 (Display Setup Patterns) and then Chapter 17 (1:33 overscan pattern), with the latter "spread" to 16:9 by the MODE button on your remote.
"Blow-by-blow" as well as instructions for service menu entry, exit and use, can be found in this post
A bit more editorializing can be found in this post
Hope this helps.