Panasonic PT-L720U Service Manual page 31

3. Repeat the following steps until the red, green and blue
crosshatch patterns merge into a white pattern.
Note:
Because the projected picture may move opposite in direction to the move of the LCD panel,
adjust the convergence observing the real projected picture carefully.
4. Reassemble the projector according to the steps 6 through 9 in
the section 6.11. "Replacement of LCD Panel".
7.4.2. Adjustment after Every LCD Panel or LCD Block Replacement
1. Display the green crosshatch pattern and adjust the lens focus.
2. Adjust the LCD panel (G) position to place the center position of
the crosshatch pattern to the center on the screen.
3. Correct the tilt of the green crosshatch pattern.
4. Display the white crosshatch pattern.
5. Adjust the LCD panels (R) and (B) to merge the red and blue
patterns with the green.
7.4.3. Adjustment after LCD Panel (G) Replacement
1. Display the white crosshatch pattern and adjust the lens focus.
2. Adjust the LCD panel (G) to merge the green pattern with the red
and blue ones.
7.4.4. Adjustment after LCD Panel (R) Replacement
1. Display the white crosshatch pattern and adjust the lens focus.
2. Adjust the LCD panel (R) to merge the green pattern with the green
and blue ones.
7.4.5. Adjustment after LCD Panel (B) Replacement
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