B. Instrument alignment.
1. Defection presets.
Control pots VR101, VR401, VR403 Focus VR are set at middle point, screen VR set to MIN.
2. Power adjustment.
2.1 Input crosshatch pattern at 31K 640×480, beam current set at 0µA.
2.2 Adjust VR101 until DC = 75V0.3V at TP201.
2.3 Adjust VR403 until voltage at TP208 = 63V0.3V for LG CRT.
63.5V0.3V for SDI CRT.
3. Size & Geometry Adjustment.
3.1 Raster Centering.
3.1.1 Input cross hatch pattern at 60K 1024*768 Hz mode.
3.1.2 Adjust contrast to 10FL, adjust screen just raster visible.
3.1.3 Adjust VR401 to center raster on screen such that the horizontal distance from the midpoint of the left
display edge to the left bezel edge is within 2mm of the distance from the midpoint of the right display
edge to the right bezel edge.
3.2 Picture size.
Input mode 1 ~ 12 signal adjust V-size, H-size to achieve.
H-sizeΚ310mm2mm.
V-sizeΚ230mm2mm.
3.3 Picture position.
Input mode 1~12 adjust V-position, H-position such
that the picture is centered with the screen.
3.4 Geometry adjustment.
3.4.1 Input mode 1~12.
3.4.2 Pincushion and barrel distortion.
3.4.3 Trapezoid and parallelogram distortion trapezoid
/ parallelogramЉ1.5mm.
3.4.4 Rotate adjustment.
h
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