Adjusting The Convergence; Adjusting With Itc - NEC DPro2070SB Service Manual

(6) After inputting check timing No. 5 in user mode and operates AUTO-ADJUST function,
confirm the focus with "e" character pattern in reverse. If "e" character is indistinct, repeat
step (1) to readjust.
*Adjustment votlage max value:
DBF-H-AMP H width: 396mm: 430V
DBF-V-AMP V width: 297mm: 200V
The focus is judged as follows.
Normal display (All preset)
Reverse display
Resolution: 1600x1200
Resolution: >1600x1200
(Note 1) Pattern A: Font 7 ×9, Cell 10×11, e character
(Note 2) Focus judgement: Crosshatch pattern should be used for normal display judgement
Halo
Focus attention point
2.4.8

Adjusting the convergence

2.4.8.1

Adjusting with ITC

Before adjusting the center mis-convergence and axial mis-convergence, carry out sufficient
full white aging (100cd/m
timing.
Timing: No. 12 (106.25kHz/85Hz,1600x1200) crosshatch pattern
Confirm that the following DDCP default setting is as shown in the table of 2.3.2.2 Factory
mode (OSM display matrix).
All items of OSM group USER5 and FACT2 of Factory mode
Adjust the horizontal and vertical convergence to the optimum setting with the CRT CP ring,
etc.
(Refer to following drawings.)
R o r B
G
B or R
Vertical convergence
Timing Judgment pattern (Note 1) (Note 2)
Pattern B: Font 7 ×9, Cell 10×11, H character
The ratio of core : Halo is as follows.
Should be 1 : 0.5 or less at the center of the picture.
Should be 1 : 1.5 or less at the both sides of the picture
To judge the reverse display, do not carry out a relative evaluation with the other point on the
screen. Instead, judge whether the e (H) character can be read distinctly at that point.
Core
2 or more, for one hour or more). Then, adjust with the following
Crosshatch pattern
Judge with pattern A
Judge with pattern B
Core
Halo
Focus pack
FOCUS1-VR
FOCUS
FOCUS2-VR
Horizontal convergence
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