Repair manual

CALIBRATION & ADJUSTMENTS
5-13
D. Electrical Focus Adjustment
Done at depot facilities only.
Equipment Needed:
CRT Collimation Master 12991
Digital Palette Gentest Diskette
Host Computer
Setup:
Bring up the “tennis court” pattern by selecting DP.GTI from the Gentest menu.
Precedure:
1. Install the CRT Collimator on the Digital Palette using the thumbscrews to secure it.
Refer to Digital Palette Collimation procedure (Figure 5-10).
2. Turn the focus wheel on the collimator while looking through the collimator
eyepiece. Look in the eyepiece and focus the collimator until the phosphors on the
screen are the sharpest possible. Look at the center cross pattern.
3. When the sharpest image is obtained, adjust R36 focus (Figure 5-2) for optimal
focus.