Adjusting The Convergence; Adjusting With Itc - NEC FP1355 Service Manual

The focus is judged as follows.
Timing
Normal display (All preset)
Reverse display
Resolution: ≤1600x1200
Resolution: ≥1600x1200
(Note 1) Pattern A: Font 7 X 9, Cell 10 X 11, e character
Pattern B: Font 7 X 9, Cell 10 X 11, H character
(Note 2) Focus judgement: Crosshatch pattern should be used for normal display judgement
Core: Judge the ratio of the halo (Center 1:1) and (both side, less than 1:1.5).
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 at that point.
Focus attention point
2.4.9

Adjusting the convergence

2.4.9.1

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, 1600 x 1200) crosshatch pattern
Confirm that the following DDCP default setting is as shown in the table.
OSD group User 5 in section 2.3.3.2
BASIC CONVERGENCE,
Factory mode in section 2.3.3.2 OSD display matrix
All items related to DDCP in FACT 5 to 8
Adjust the horizontal and vertical convergence to the optimum setting with the CRT CP ring,
etc.
(Refer to following drawings.)
R or B
G
B or R
Vertical convergence
Judgment pattern (Note 1) (Note 2)
Crosshatch pattern
Judge with pattern A
Judge with pattern B
2
or more, for one hour or more). Then, adjust with the following
FOCUS
Horizontal convergence
2 - 16
Focus pack
FOCUS1-VR
FOCUS2-VR