NEC MultiSync V920, Service Manual

Page: 12 / 67

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(12) FOCUS Adjust:
(A) Adjust H.parabola Vp-p by OSM H-Focus control.
>
53K H.para : 90% ~ 100%
<
53K H.para : 80% ~ 90%
Check T303 output Vp-p.
H.para : 350 Vp-p (Max. 500 Vp-p)
Hitachi V.para : 190 Vp-p (Max. 190 Vp-p)
Samsung V.para : 150 Vp-p (Max.150 Vp-p)
(B) MODE: 79.9kHz 1280*1024(75)
(C) PATTERN: CROSSHATCH
(D) Adjust Focus VR(S), horizontal line must be clearly. (FBT center VR)
Adjust Focus VR(D), vertical line must be clearly. (FBT up VR)
(13) Convergence Adjust:
(A) MODE: 79.9kHz 1280*1024(75)
(B) PATTERN: CROSSHATCH.
(C) Adjustment: Use the convergence meter to check the spec. if can not follow the spec,
adjust Yoke coil to make be follow the spec.
(14) Automatically adjust:
Adjust H-SIZE, V-SIZE, H-PHASE, V-PHASE, PINCUSHION, TRAPEZOID R.G.B. GAIN by
factory product line automatic adjustment system¢wsystemER9300 ,ER2300)(Adjust NO.
1~14MODE).
H.SIZE : 356
+
3mm
H.SIZE : 267
+
2mm
H.POSI :
+
2mm
H.POSI :
+
2mm
(15) White Balance Adjustment (set VR304 in the central of VR)
(A) MODE: 80kHz 1280*1024
(B) PATTERN: ALL BLACK
(C) Make External Degauss
(D) Video signal off (0Vp-p), Brightness set to Max, check screen at the brightness 1~1.5FL.
(4.2
+
0.8 cd/m²), or adjust VR304 at brightness 1~1.5FL.(4.2
+
0.8 cd/m²)
X = 0.283 ± 0.01
y = 0.297 ± 0.01
Y = 4.2 ± 0.8 cd/m²
(16) White Balance Check and ABL Adjust:
(A) MODE: 80kHz 1280*1024(75)
(B) PATTERN: CENTER BLOCK(WINDOW)