6. Repeat steps for green only. 7. Set VIDEO �C_OFF� DAC from 00 to 03, and project only blue. 8. Repeat steps for blue only.
16.2.1. Focus - Optical lens adjustment
Optical adjustments NOTE: This adjustment normally should not require resetting unless the lens has been replaced or adjustment has changed.
1. Optical focus adjustment is located on the top of each CRT lens system. Loosen the adjustment knurled locking knob.
Optical lens focus adjustment
2. Turn the PTV ON. Apply and view a crosshatch with dots pattern. 3. Adjust each lens focus for best focus while viewing each CRT. 4. Cover the red and blue CRT, projecting green only. Rotate the green lens for best focus around screen center area. 5. Do the same for the red focus lens while projecting red only. 6. Repeat for blue. 7. Align VM coils.
