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Alignment and Adjustments
1-4-6 Static Focus Adjustment
PRECAUTION
1. Select the �DYNAMIC� video mode. 2. Input a crosshatch pattern. 3. Cover the lenses that are not being adjusted. 4. Connect a convergence jig and read data. 5. Adjust the lens for best focus. (See Fig, 4-1) 5. Green lens adjustment: Set the lens at the point where Blue just changes to Red. If the color aberration is irregular throughout the picture screen, adjust the lens to show Red color aberration (approximately 1~3 mm area) within a 3-block grid around the horizontal center-line. If the color aberration is irregular, adjust the lens as shown in the diagram below. (Accurate alignment of Green is important for overall color quality.) 6. Red lens adjustment Set the Red lens at the point where Orange becomes Crimson. 7. Blue lens adjustment Set the Blue lens at the point where Purple becomes Green.
P L1 L2
4. When the lens is turned clockwise, the color aberration will change as follows: Lens R G B Color Aberration Change Orange - Crimson Blue - Red Purple - Green
STATIC FOCUS (CONTINUED)
Vary the focus pack VR (Red, Blue) on the front cabinet. Adjust the TV for best possible focus around the center of the crosshatch pattern, without losing overall screen balance. Figure Crosshatch Pattern Examine these points together.
Examine these points together
Fig. 4-1 Crosshatch Pattern.
RED ABERRATION BLUE ABERRATION L1, L2_ P <
1-4-7 Lens Focus Adjustment
PRECAUTIONS
1. Do this adjustment after the static focus adjustment and the tilt adjustment. 2. Select the �DYNAMIC� video mode. (Contrast:100, Brightness:50) 3. Input a crosshatch pattern.
Fig. 4-2 Color Aberration
ADJUSTMENT
1. Loosen the lens screws. 2. Cover the two lenses that are not being adjusted. 3. Adjust the lens, observing the color aberration vertically and horizontally within 3 blocks of the center of the crosshatch pattern.
