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Green Geometry
The Green Geometry must be done first when performing a complete convergence alignment. A Screen Template is necessary to obtain the correct geometry. Failure to use the Screen Template or misalignment of the convergence will result in reduced life of the Convergence amplifiers. Place the Screen template on the TV screen. Select GREEN in the selection menu. The Cursor will appear in the center of the screen as shown below.
When the ACS module has been replaced and Default settings have been loaded, the following procedure should be used to adjust the convergence. Otherwise use the Cursor Up-Down and Right-Left buttons to Navigate to the area to be adjusted. Press the Menu button to adjust then use the Cursor buttons to move the Green cross onto the Template. The adjustment of the cross has two step sizes, large and small. Press the Menu button to toggle between the two. After a point has been adjusted, press the Index button to return to Navigate. When Default settings have been loaded, the leftmost line that is not visible should be adjusted first. Adjust the Vertical line 0 while observing line 1 to make line 1 parallel with the left edge of the screen. The adjustment should only be made in small steps. Do not adjust any one point more than 1/4 the distance of one grid. After the left most line is adjusted, start at the center left of the screen and work to the right, aligning the Horizontal line. When adjusting the Horizontal lines, best results are obtained when working from left to right. After the Center line is adjusted, go to the next line down until all of the lines have been adjusted. Then work from the center up to adjust the Horizontal lines. Using the same method, work from center out to adjust the Vertical lines. At least three passes will be necessary to complete the alignment. Press the Index button to return to the selection menu. When the Green geometry is complete, Store the data. Remove the Template from the screen. Select Red to Green in the selection menu. Using the same method that was used to adjust the Green Grid to the Template, adjust the Red Grid onto the Green Grid. If the set is a later production, select SP RED to center the Red grid onto the Green grid. Exit this mode by pressing the Menu button. Then select the MP RED to adjust the Red onto the Green using the 35-point adjustment. When this is complete, select the RED TO GREEN to perform the 208-point adjustment.
