Lens Focus Adjustment - Samsung SP43R1HL1X/XEC Service Manual

2-5-5 Lens Focus Adjustment

PRECAUTIONS
1. Do this adjustment after the static focus adjustment and
the tilt adjustment.
2. Select the "STANDARD" video mode.
(Contrast:100, Brightness:50)
3. Input a crosshatch pattern.
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.
4. When the lens is turned clockwise, the color aberration
will change as follows:
Lens Color Aberration Change
R Orange - Crimson
G Blue - Red
B Purple - Green
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.
Samsung Electronics
Alignment and Adjustments
Fig. 4-2 Color Aberration
2-31