NEC MultiSync V520 Service Manual

(5) B+ Adjustment
(A) MODE: No. 12.
(B) Pattern: Full white. (Brightness just cut off)
(C) Adjust VR101 to make the cathode of D112 has 13.6V.
(D) Check other power source should be 78
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¡Ó2V, 6.2V
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¡Ó0.3V, 53.5V
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¡Ó1.5V, -11.5
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¡Ó0.5V.
(6) X-RAY Test
(A) Mode: No.12
(B) Pattern: Normal Crosshatch (Brightness just cut off)
(C) Test
1. Use Hi-Voltage probe
2. Adjust VR102 until X-RAY protector is operated, then check the protection voltage
should be 29.5kV or less.
3. After X-RAY protection test, turn back the VR102 position to center.
(7) H. V. Adjustment
(A) Mode: No. 12
(B) Pattern: Full White(Brightness just cut off)
(C) Adjust VR102 to make the cathode of D114 has 116.0V (Toshiba, Samsung CRT), 115V
(LG CRT)
(D) Check the high voltage is 24.5kV
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¡Ó1kV.
(8) H-Raster Center Adjustment
(A) Mode: No. 18
(B) Pattern: Crosshatch Reverse
(C) Adjust the Brightness Control that the background can be visible.
(D) Change SW301 position to make the mostly near center background position.
(9) Mode 11 Pre-Adjustment
(A) Mode: No. 12
(B) Pattern: Crosshatch
(C) Enter to Factory mode. Adjust H-phase, V-center, H-size, V-size, Pincushion, Trapezoid,
Bow, Parallelogram, and rotation to make Picture Position Center and Picture Size
270*203mm.
(10) White Balance Adjustment
(A) Setting
Enter Factory Mode,
Mode: No. 12, Pattern: Full White.
Warm up 30 min.
Make External Degauss.
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NEC MultiSync V520 Specifications

General

Brand	NEC
Model	MultiSync V520
Category	Monitor
Language	English