Originally Posted by Cleanupthat
Can someone just please tell me the exact setting in the service menu for the hs420 to adjust a straight line from not being straight on the sides of the picture. Or the setting for a line on the bottom left of the screen curling up a little and top left, curling down. Same with the other side of the screen. Is there an exact setting in the service menu to adjust that????
I believe the service menu items affecting these "linearity" artifacts are in the D-CONV group. Of course tweaking these is partially related to the image that's on your screen, i.e. the amount of overscan you've adjusted for (assuming proper centering and sizing, using a proper test pattern). The amount of curvature/bowing you see is a function of how much extreme-perimiter image you've "cropped" through overscan adjustments. The more image you show, the more the bowing is apparent.
There is some subtlety and delicacy here, and further variability depending on whether or not you've also had a Sony technician apply permalloy magnets to deal with convergence problems. The service menu can only deal with adjustments to deal with horizontal line convergence issues. Convergence problems on vertical lines can only be dealt with using magnets. And inevitably, these magnets will also affect linearity... either intentionally or unintentionally.
So, looking at my adjustments in the D-CONV area, and realizing that my numbers will likely not be entirely useful on your set (since I HAVE had magnets applied to my XBR960 for initial convergence problems), my relevant D-CONV settings (original and adjusted) are as follows:
0-YBWU (45,38) upper Ybow
1-YBWL (43,38) lower Ybow
2-RSAP (31,31) right H amp (offset)
3-RUMB (27,27) right upper middle bow
4-RUBW (24,0) right upper bow
5-RLMB (27,27) right lower middle bow
6-RLBW (23,25) right lower bow
7-LSAP (23,25) left H amp (offset)
8-LUMB (20,11) left upper middle bow
9-LUBW (15,14) left upper bow
10-LLMB (24,26) left lower middle bow
11-LLBW (22,23) left lower bow
Again, my values may be worthless to you because of my "magnet treatment" which also affects linearity as well as convergence (hence the delicacy and individuality of this whole process). Everybody's set is different. But these items are definitely modified in my list, and I know I was very intent on eliminating the initial "bowing" of horizontal lines I observed at both the top and bottom of the screen when I first got my set. In fact, I'd guess EVERYBODY has observed this problem and wants to cure it.
Don't forget that overscan adjustment, including horizontal/vertical centering, sizing and positioning, is also a crucial set of tweaks you need to apply. These service menu items are in 2170D-1, 2170D-2, and then MID3 (for 480p/720p/1080i, anyway). MID2 is part of the 480i setup.