LG 575N, 575C, CB575BN, CB575BC ADJUSTMENT

ADJUSTMENT

- 14 -

GENERAL INFORMATION

All adjustment are thoroughly checked and corrected

when the monitor leaves the factory, but sometimes sev-

eral adjustments may be required.

Adjustment should be following procedure and after warm-

ing up for a minimum of 30 minutes.

• Alignment appliances and tools.

- IBM compatible PC.

- Programmable Signal Generator.

(eg. VG-819 made by Astrodesign Co.)

- EPROM or EEPROM with saved each mode data.

- Alignment Adaptor and Software.

- Digital Voltmeter.

- White Balance Meter.

- Luminance Meter.

- High-voltage Meter.

AUTOMATIC AND MANUAL DEGAUSSING

The degaussing coil is mounted around the CDT so that

automatic degaussing when turn on the monitor. But a

monitor is moved or faced in a different direction, become

poor color purity cause of CDT magnetized, then

press

DEGAUSS on the OSD menu.

ADJUSTMENT PROCEDURE & METHOD

-Install the cable for adjustment such as Figure 1and run

the alignment program on the DOS for IBM compatible PC.

-Set external Brightness and Contrast volume to max position.

1. Adjustment for B

+

Voltage.

1) Display cross hatch pattern at Mode 3.

2) Adjust voltage to 194V

±

0.5Vdc with VR901.

2. Adjustment for High-Voltage.

1) Display cross hatch pattern at Mode 3.

2) Adjust FBT voltage to 24kV

±

0.1Vdc with

VR701.

3. Adjustment for Horizontal Raster Center.

1) Display cross hatch pattern at Mode 3.

2) Adjust the raster should be center of the screen with

SW701.

3. Adjustment for Factory Mode (Preset Mode).

1) Display cross hatch pattern at Mode 1.

2) Run alignment program for StudioWorks 575N, 575C

on the IBM compatible PC.

3) Power button of the monitor turn off

→ turn on.

4) COMMAND → START → Y(Yes) command.

5) DIST. ADJ. → TILT command.

6) Adjust tilt as arrow keys to be the best condition.

7) DIST. ADJ. → BALANCE command.

8) Adjust balance of side-pincushion as arrow keys to

be the best condition.

9) DIST. ADJ. → BALANCE command.

10)

Adjust parallelogram as arrow keys to be the best

condition.

11)

DIST. ADJ. → FOS. ADJ command.

12)

Adjust V-SIZE as arrow keys to 200

±

1mm.

13)

Adjust V-POSITION as arrow keys to center of the

screen.

14)

Adjust H-SIZE as arrow keys to 270

±

1mm.

15)

Adjust H-POSITION as arrow keys to center of the

screen.

16)

Adjust S-PCC (Side-Pincushion) as arrow keys to be

the best condition.

17)

Adjust TRAPEZOID as arrow keys to be the best

condition.

18)

Display from Mode 1 to Mode 6 and repeat above

from number

12)

to

17)

.

19)

PRESET EXIT → Y (Yes) command.

4. Adjustment for White Balance and Luminance.

1) Set the White Balance Meter.

2) Press the DEGAUSS on the OSD menu for demagneti-

zation of the CDT.

3) Set SUB-Brightness to 110(decimal) and G-BIAS to

130(decimal), and R-BIAS and B-BIAS to min posi-

tion.

4) Display color 0,0 pattern at Mode 3.

5) COLOR ADJ. → LUMINANCE command of the

alignment program.

6) COLOR ADJ. → BIAS ADJ. command of the align-

ment program.

7) Adjust screen control on the FBT to 0.2±0.05FL of

the raster luminance. If it’s not green color, the mon-

itor must repair.

8) Adjust R-BIAS and B-BIAS command to x=0.281

±

0.002 and y=0.311

±

0.002 on the White Balance

Meter with PC arrow keys.

9)

Display color 15,0 box pattern (70x70mm) at Mode 3.

10)

Set Contrast and SUB-Contrast to 200(decimal)

position.

11)

DRIVE ADJ command.

12)

Set G-DRIVE to 160 (decimal) at DRIVE of the align-

ment program.

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Figure 1. Cable Connection

13)

Adjust R-DRIVE and B-DRIVE command to white

balance x=0.281

±

0.002 and y=0.311

±

0.002 on the

White Balance Meter with PC arrow keys.

14)

Adjust SUB-CONTRAST command to 55

±

0.5FL of

the color 15,0 box pattern (70x70mm) luminance at

mode 3 and save in color 1.

15)

Display color 15,0 full white patten at Mode 3.

16)

COLOR ADJ. → LUMINANCE → ABL command.

17)

Adjust ABL to 40

±

0.5FL of the luminance.

18)

Exit from the program.

5. Adjustment for Focus.

1) Display H character in full screen at Mode 4.

2) Adjust Focus control on the FBT that focus should be

the best condition.

220

Monitor to be

adjusted

Video

Signal

Generator

IBM

Compatible PC

Parallel Port

Power inlet (required)

Power LED

ST Switch

Power Select Switch

(110V/220V)

Control Line

Not used

RS232C

PARALLEL

V-SYNC

POWER

ST

VGS

MONITOR

E

E

V-Sync On/Off Switch

(Switch must be ON.)

F

F

A

A

B

B

C

C

15

10

5

5

69

1

1

1

14

13

25

6

5V

5V

5V

4.7K

4.7K

4.7K

74LS06

74LS06

OFF ON

OFF

ON

11