Hitachi 46W500 Training page 88

DP-3X CHASSIS RED AND BLUE RASTER OFFSET ADJUSTMENT
INFORMATION:
Raster Offset is necessary to conserve Memory allocation.
It is very important to remember that the Red is offset Left of Center and Blue is offset Right of center.
Please use the following information to accurately offset Red and Blue from center.
Also see Overlay Dimensions for further details.
Preparation for adjustment:
• With Power Off, press the Service Only switch on the Convergence PWB. While holding the Service Only
Switch down, press the Power On button and Release. DCU Grid will appear without convergence correc-
tion. NOTE: After entering DCAM, with each press of the Service Only Switch, the picture will toggle be-
tween Video mode and DCU Grid.
• Video Control should be set at Factory Preset condition.
• Static Focus adjustment should be finished.
Adjustment Procedure
1. Turn the centering magnets of Red, Green and Blue and adjust so that the center point of the cross-hatch
pattern satisfies the diagram and Offset Value Table below. (DCU data is cleared). Remember Green is
Centered. Red is to the left of Green and Blue is to the right of Green as indicated below.
•
All Vertical positions are geometric center of screen.
•
Parameters are +/- 2mm.
Geometric Vertical Center
Offset Value Table
SCREEN SIZE
46 inch
51 inch
57 inch
65 inch
Red
Red Offset
Geometric Horizontal
Red Offset
20mm
20mm
20mm
20mm
Blue
Blue Offset
Green
Blue Offset
35mm
25mm
25mm
25mm
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