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observe the tv if its focusing well..if not the,the horizontal stage is defective..if the focusing is ok,you need to set the unit to service mode to make the adjustment nessesary to fixed the problem..or sometimes ther is an internal adjustment..if you are lucky enought
To answer your concern, all you have to do is to change the setting of your aspect ratio on your TV.
Here is my suggested way to procede:
1. Apply 1080i signal, which should produce an oversized HD image on ColorStream1or 2. 2. Select an HD channel that is broadcasting standard 4:3 image, not wide screen. 3. Switch to the Service Mode ( Please refer to the above links). In the Service mode, press channel up/down to find the Adjustment parameters needed for the following steps.
4. Adjust HIT with volume up/down control for the image height to 22.5 inches.
6. Adjust WID for image width of 30 inches, (22.5*4/3) 7. Adjust HPOS to center the image. 8. Adjust PARA and TRAP to minimize geometric distortion. 9. Switch into Convergence mode and Adjust VLIN to get equally spaced horizontal grid lines. 10. Measure the length of the central grid lines and note the number of horizontal and vertical grid lines. This information is used to create an overlay grid. 11. Create the overlay grid on 40x25 x0.003 inch clear Acetate sheet, which you can get at the Art Supply store for under $2. Draw the grid with a fine line erasable pen. Draw vertical and horizontal lines through the center of the sheet so that the lengths are the same as the central grid lines. Now draw the grid so that it has the same number of lines as the convergence grid but are equally spaced, with the outer ones at the ends of the central lines. 12. Cut off about 1/4 inch from the right side of the sheet so that the sheet can lay flat against the screen, which is slightly less than 40 inches. 13. Put a reference mark on the TV frame 2.5 inches down from the upper left side of the screen. 14. Place the overlay on the screen so that the upper edge lines up with the reference mark. The overlay sticks by electrostatic attraction. 15. Use convergence controls to remove grid distortion and converge grid colors. Refer to the Anamorphic link for details. 16. Enjoy 1080i.
Other Comments: I didn't realize I could create the overlay grid before placing the Acetate sheet on the TV screen, until I finished drawing the grid with the sheet placed on the screen. I added grid lines as called for in the procedure. I'm sure this method took much longer no only to draw the lines but some of them were difficult to see.
Part way through the convergence procedure, I became concerned that the image width was off since I did my screen adjustment with wide screen image. Thus, I decided to repeat that step with a 4:3 screen.
I confirmed the need to press 7 often to save results since after I adjusted one grid color without it, I accidentally hit a key that switched me out of convergence mode and when I switched back, all settings were gone.
Another mistake I made was not realizing that the cursor color determines which grid gets moved.
Has the image been "zoomed" into? This is usually the result of a image that has been adjusted to fill the screen. This is not the same as adjusting the aspect ratio as that would still show the entire image even if distorted. When the image is cropped or is missing information, a zoom feature is usually the culprit.
If this isn't the problem, you maybe able to adjust the TV's horizontal/vertical placement through the TV's onscreen menu but only if it provides that option. Do you see other channels that appear to fit properly? I have seen certain channels not fit correctly while others do and this is due to the signal, not your TV.
Found some relevant info on how to adjust your video settings... You might want to give it a try!
4.12 PC Input Picture Adjustment
The Picture Adjust menu operates in the same
way for the PC Input as for the DTV / TV input in
section 4.2 for Backlight, Contrast, Brightness and
Color Temperature. 4.12.1 Auto Adjust
When the MENU button is pressed, the On Screen
Display (OSD) appears on the PICTURE ADJUST
page. Press the button to highlight the Auto
Press the button for the LCD HDTV to adjust to
the PC signal timing automatically. 4.12.2 H-SIZE
Press the button to highlight the H-Size selection.
Press the button to start adjusting the horizontal size of the picture. Use the or button to adjust
the horizontal size. 4.12.3 Horizontal Shift
Press the button to highlight the Horizontal Shift selection.
Press the button to start adjusting the horizontal position of the picture. Use the or button to
adjust the horizontal position. 4.12.4 Vertical Shift
Press the button to highlight the Vertical Shift selection.
Press the button to start adjusting the vertical position of the picture. Use the or button to adjust
the vertical position. 4.12.5 Fine Tune
Press the button to highlight the Fine Tune selection.
Press the button to start tuning the to the PC signal. Use the or button to adjust the tuning
4.14.1 Understanding Viewing Features
Your LCD HDTV features four viewing modes and Picture-In-Picture (PIP)/Picture-by-Picture (POP) mode.
You can switch viewing modes using the remote control. 4.14.2 Viewing Modes Normal Mode
The original 4:3 aspect ratio (1.33:1 source) is preserved, so black bars are
added to the left and right of the display image. Standard TV broadcasts are
displayed with a 4:3 Aspect Ratio. Movies in 4:3 Aspect Ratio may be referred
to as pan-and-scan or full frame. These movies were originally filmed in 16:9
(widescreen), and then modified to fit a traditional TV screen (4:3). Wide Mode
When watching a standard broadcast or full-frame movie in this mode,
the display image is stretched proportionately to fill the TV screen.
When watching a widescreen (1.78:1 source) program or movie, the
display image fills the TV screen. If you are watching a widescreen
(1.85:1 or 2.35:1 source) program or movie, there will still be black
bars at the top and bottom. Zoom Mode
When watching a widescreen (1.78:1, 1.85:1, or 2.35:1 source)
program or movie, the display image is zoomed proportionally to fill the
width of the screen. The top and bottom are cut off to remove most of
the source material’s black bars. This mode is good for programs or
movies with sub-titles. Panoramic Mode
When watching a standard broadcast or full frame movie in this mode,
the 4:3 Aspect Ratio (1.33:1 source) display image is stretched
horizontally on the left and right sides to fill the TV screen. The center
of the image is not stretched.
Note: Viewing modes are saved based on input. For example, you lasted watched a DVD in widescreen mode and then watched TV in standard mode. When you switch back to DVD input, the viewing mode will return to widescreen.