LG StudioWorks 520Si Owner's Manual page 34

GENERAL INFORMATION
All adjustment are thoroughly checked and corrected
when the monitor leaves factory, but sometimes several
minor adjustment may be required.
Adjustment should be following procedure and after
warming up for a minimum of 30 minutes.
• Alignment appliances and tools.
- Programmable Signal Generator.
(eg. VG-819 made by Astrodesign Co.)
- E(E)PROM with each mode data saved.
- Digital Voltmeter.
- White Balance Meter.
- Luminance Meter.
ADJUSTMENT PROCEDURE & METHOD
Set Contrast ( ) and Brightness (
position.
1. Adjustment for B + Voltage
1) Display cross hatch pattern at Mode 1.
2) Adjust VR901 to 14±0.2Vdc at D922 cathode voltage.
2. Adjustment for High Voltage
1) Display cross hatch pattern at Mode 1.
2) Adjust D804 cathode voltage to 63 ± 0.2Vdc with VR801.
3. Adjustment for Screen Image (Factory Mode)
Install adaptor and cable for adjustment such as figure 1
and run alignment program on DOS for IBM compatible
PC.
1) Set ST Switch to OFF of the adaptor.
E
(Refer to see Figure 1.)
2) Display cross hatch pattern at Mode 1.
3) Adjust horizontal size (
alignment program or +, – buttons on the monitor to
270 ± 1mm.
4) Adjust horizontal position (
alignment program or +, – buttons on the monitor to
center of the screen.
5) Adjust vertical size (
alignment program or +, – buttons on the monitor to
195 ± 1mm.
6) Adjust vertical position (
alignment program or +, – buttons on the monitor to
center of the screen.
7) Adjust side-pincushion (
alignment program or +, – buttons on the monitor to
be the best condition.
ADJUSTMENT
) volume to max
) with H-SIZE in the
) with H-POSI in the
) with V-SIZE in the
) with V-POSI in the
) with S-PCC in the
- 12 -
8) Adjust trapezoid (
alignment program or +, – buttons on the monitor to
be the best condition.
9) Display from Mode 2 to Mode 5 and repeat above
adjustment.
4. Adjustment for White Balance and Luminance.
1) Set the White Balance Meter.
2) Demagnetize CDT with the demagnetizer. (external
degaussing coil).
3) Adjust H x V size to 270 ± 2mm x 195 ± 2mm.
4) Display color 0,0 pattern at Mode 1.
5) Set Brightness (
max position.
6) Set VR302 (G-BIAS) and VR312 (R-BIAS) to min
and VR322 (B-BIAS) to center position.
7) Adjust Screen control on the FBT to 0.9~1FL of the
raster luminance.
8) Adjust VR302 (G-BIAS) and VR312(R-BIAS) to
x=0.283 ± 0.01 and y=0.298 ± 0.01.
9) Adjust Screen control on the FBT to 0.3~0.4FL of the
raster luminance.
10) Display color 15,0 box pattern (70 x 70mm) at Mode 1.
11) Set Brightness (
max position.
12) Adjust VR311 (G-DRIVE) to 55 ± 1FL of the box
pattern luminance.
13) Adjust VR301 (R-DRIVE) and VR321 (B-DRIVE) to
x=0.283 ± 0.003 and y=0.298 ± 0.003.
14) Set Brightness (
max position.
15) Display color 15,0 full white patten at Mode 1.
16) Adjust VR503 (ABL) to 33 ± 1FL of the luminance.
5. Adjustment for Focus.
1) Display H character in the full screen at Mode 4.
2) Adjust two Focus control on the FBT that should be
the best condition.
) with TRAPEZOID in the
), Contrast ( ) volume to
), Contrast ( ) volume to
), Contrast ( ) volume to