LG 62SX4D-UB Service Manual page 19

13-1. Geometery
(1) When the upper portion of the screen is larger than the
bottom: Adjust Projection lens upward.
(2) When the upper portion of the screen is smaller than the
bottom: Adjust Projection lens downward.
(3) When the horizontal line is tilting in the Cross Pattern:
Engine Base is rotating with the left/right.
13-2. Geometry, Adjustment
(1) When the screen is rotated: Rotate the Engine to adjust
1) Distortion Type: Tilt
2) Adjustment Method:
The adjustments will raise or lower the mount on the
right or left side so the image will be level.
(2) In case of the upper screen size is large bottom screen
size than: upward projector
1) Distortion Type: Keystone
2) Adjustment Method:
To correct figure (A) lower the light engine.
To correct figure (B) raise the light engine.
ADJUSTMENT INSTRUCTIONS
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<Figure (A)>
<Figure (B)>