Toshiba 50PH46P Service Manual page 17

Adjustment items
Focus adjustment (Conditions)
- User adjustment: Dynamic mode, Cinema mode
- To be performed after centering magnet adjustment.
- Signal : Lens: R .... Crosshatch (PAL)
Electrical focus :
(Adjustment)
1. Common item
1) Make coarse adjustments in advance on the lens focus and electrical
focus of each R, G, and B tube.
2. G adjustment
1) Set to the G monochrome by lens cap.
2) Receive the image of crosshatch.
3) Adjust the G electric focus.
Adjust the G electrical focus by the focus volume of focus block (Z410)
so that the screen center will come to optimum focus. (Although the G
electrical focus is to be adjusted to allow the scanning lines in the center
of the screen to be seen most clealy, if G alignment and astigmatism are
inferior with the appearance of vertical and horizontal flares in the center
of and around the screen and if the lines become thicker, adjust to the
best point observing the entire screen.)
4) Adjust the G lens focus.
Keep an eye on the center of the crosshatch pattern and adjust so that
the screen center will become clear.
As a rough guide to decrease unevenness, adjust so that red flares on
both sides of the crosshatch line will come to 1mm in thickness.
5) Repeat 3, 4, and attempt to further improve the focus quality.
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Adjusting methods
G .... Crosshatch (PAL)
B .... Crosshatch (PAL)
R .... Crosshatch (PAL)
G .... Crosshatch (PAL)
B .... Crosshatch (PAL)