To adjust geometry, Center the pattern

Calibrating and Adjusting

To adjust geometry

1Display the white cross-hatch test pattern on the CRT.

From the Color Display Test menu, select the white, cross-hatch pattern.

2Preset the front panel brightness control, the top of the two controls to the left of the display, maximum clockwise.

3Preset the front panel contrast control, the bottom of the two controls to the left of the display, to the mechanical center.

4Preset H.SUB SHIFT (RV006) and V.SUB SHIFT (RV008), located on the bottom PC board, to the mechanical centers.

All of the following adjustment potentiometers are located on the PC board on the left side of the display.

•Adjust H.SIZE (RV504) for a 161 mm (6.34 in.) width.

•Adjust V.HEIGHT (RV50) for a 120.5 mm (4.74 in.) height.

•Adjust V.CENT (RV510) for vertical centering.

•Adjust H.CENT (RV503) for horizontal centering.

7Adjust PIN AMP (RV506) to eliminate pincushion distortion in the vertical lines of the cross-hatch pattern as shown in the next figure.

8Remove the left, bottom rail of the mainframe.

The left, bottom rail must be removed in order to access the next adjustment.

9Adjust PIN PHASE (RV505) to eliminate pin phase distortion in the vertical lines of the cross-hatch pattern as shown in the next figure.

10Reinstall the bottom rail.

11Adjust TOP PIN (RV511) so that the top horizontal line is parallel with the center horizontal line.

12Adjust BOTTOM PIN (RV512) so that the bottom horizontal line is parallel with the center horizontal line.

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