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(C) White Balance Adjustment (Factory Auto Adjustment); (D) Maximum Brightness Adjustment; Focus Adjustment; Convergence Adjust - NEC MultiSync V720 Service Manual

N0701 series
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3. Adjust VR210, VR230 and VR250 to make X=283, Y=297, with readjusting VR301
(VR307 for Toshiba CRT) to keep the brightness between 1~1.5FL (3.4~5.1 cd/m2).

(C) White Balance Adjustment (Factory Auto Adjustment)

1.9300K (Select the color Mode 9300K)
1) 50*50mm Green block Pattern, Brightness Control set to Max, Contrast Control set
to Max, Adjust [G] gain control to Y=45FL. (154 cd/m2)
2) Change Pattern to Full White, Brightness control set to Min.
3) Adjust [R] gain control, [B] gain control to X=283, Y=297 at the contrast control is
adjusted 15FL (52cd/m2).
4) Check the color tracking shall be X=283 ¡Ó
(17~86cd/m2) condition.
2.7500K (Select the color Mode 7500K)
1) 50*50mm Green block Pattern, Brightness Control set to Max, Contrast Control set
to Max, Adjust [G] gain control to Y=42FL. (144 cd/m2)
2) Change Pattern to Full White, Brightness control set to Min.
3) Adjust [R] gain control, [B] gain control to X=300, Y=315 at the contrast control is
adjusted 15FL (52cd/m2).
3. 6500K (Select the color Mode 6500K)
1) 50*50mm Green block Pattern, Brightness Control set to Max, Contrast Control set
to Max, Adjust [G] gain control to Y=39FL. (134 cd/m2)
2) Change Pattern to Full White, Brightness control set to Min.
3) Adjust [R] gain control, [B] gain control to X=315, Y=325 at the contrast control is
adjusted 15FL (52cd/m2).

(D) Maximum brightness Adjustment

1. Brightness control set to Max., contrast control set to Max
2. Adjust VR306 to Y=31FL(105cd/m2)

(11) Focus Adjustment

(A) Mode: No.16
(B) Pattern: Full 'o' (4dots hole) Pattern, Brightness just cut off, Contrast maximum.
(C) Adjust Focus VR that 'o' mark shall be clearly at 1/4 poit of the diagonal line.

(12) Convergence Adjust

(A) Mode: No. 12
(B) Pattern: Crosshatch.
(C) Use the convergence meter to check whether the convergence is within spec.
Adjust the CPC Magnet to make the convergence within spec.
¡Ó15, Y=297 ¡Ó
¡Ó
¡Ó
¡Ó
19
¡Ó15 between Y=5~25FT-L
¡Ó
¡Ó
¡Ó
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