HP 8562E, Service Manual

Page: 58 / 482

2. Display Adjustment
Press then set the to -70 and the
LOG
to 1. This
should almost completely fill the screen with the noise floor. Press Adjust
GAIN until the intensity at the center of the screen is about medium. It
should be fully illuminated, but not so bright that it burns the screen (15 on a
photometer/radiometer).
17. Press (CAL), MORE of 2 , and
CRT PATTERN.
Locate the dot just below the
HP logo. Adjust ASTIG for the smallest round dot possible.
18. Adjust COARSE FOCUS and DDD for the best focus of the characters
at the center of the screen.
19. Adjust Z FOCUS for the best focus of the test pattern outside box.
20. Adjust X FOCUS for best focus of the characters at the corners of the test
pattern.
21. Repeat steps 17 through 20 to obtain the best overall focus quality.
2-18 Adjustment Procedures