LG 773E, CB773F-EA, CB773F-NA ADJUSTMENT

ADJUSTMENT

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0GENERAL INFORMATION

All adjustment are thoroughly checked and corrected
when the monitor leaves the factory, but sometimes
several adjustments may be required.
Adjustment should be following procedure and after
warming 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 4.

2) Adjust voltage to 50V

±

0.5Vdc with VR901.

2. Adjustment for High-Voltage.

1) Display cross hatch pattern at Mode 4.

2) DIST.ADJ→CTRL PWM → High Voltage Command.

3) Adjust High Voltage to 25.5kV

±

0.1 kVdc.

4) Press Enter Key.

3. Adjustment for Factory Mode (Preset Mode).

1) Display cross hatch pattern at Mode 1.

2) Run alignment program for CB773F on the IBM
compatible PC.

3) EEPROM → ALL CLEAR→ Y(Yes) command.

<Caution> Do not run this procedure unless the
EEPROM is changed. All data in EEPROM (mode
data and color data) will be erased.

4) Power button of the monitor turn off → turn on.

5) COMMAND → START → Y(Yes) command.

6) DIST. ADJ. → CTRL PWM → TILT command.

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

8) DIST. ADJ. → BALANCE command.

9) Adjust parallelogram as arrow keys to be the best
condition.

10)

DIST. ADJ. → BALANCE command.

11)

Adjust balance of side-pincushion as arrow keys to
be the best condition.

12)

Display cross hatch pattern at Mode 1~4.

13)

DIST. ADJ. → FOS. ADJ command.

14)

Adjust V-SIZE as arrow keys to 230±2mm.

15)

Adjust V-POSITION as arrow keys to center of the
screen.

16)

Adjust H-SIZE as arrow keys to 310±2mm.

17)

Adjust H-POSITION as arrow keys to center of the
screen.

18)

Adjust S-PCC (Side-Pincushion) as arrow keys to be
the best condition.

19)

Adjust TRAPEZOID as arrow keys to be the best
condition.

20)

Save of the Mode.

21)

Save of the System.

22)

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
demagnetization of the CDT.

3) COLOR ADJ. → LUMINANCE command of the
alignment program.

4) Set Brightness and Contrast to Max and Sub­Brightness to 70(46) position.

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

6) COLOR ADJ. → BIAS ADJ. command of the
alignment program.

7) Check whether green color or not at R-BIAS and B­BIAS to min position and G-BIAS to 127(7F) to
position. Adjust G2(Screen) command to 0.4

±

0.05FL of the raster luminance. If it's not green color,
the monitor must be repaired.

8) Adjust R-BIAS and B-BIAS command to x=0.283

±

0.005 and y=0.298±0.005 on the White Balance
Meter with PC arrow keys.

9)

Adjust SUB-Brightnesscommand to 0.4±0.1FL of the
raster luminance.

10)

Display color 15,0 Window pattern (70x70mm) at
Mode 4.

11)

DRIVE ADJ command.

12)

Set SUB-Contrast 100(64) (decimal) position.

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Figure 1. Cable Connection

13)

Set G-DRIVE to 90(5A) at DRIVE of the alignment
program.

14)

Adjust R-DRIVE and B-DRIVE command to white
balance x=0.283

±

0.003 and y=0.298±0.003 on the

White Balance Meter with PC arrow keys.

15)

Adjust SUB-CONTRAST command to 54±2FL of the
color 15,0 box pattern (70x70mm) luminance at
mode 4 and save in color 1.

16)

Display color 15,0 full white patten at Mode 4.

17)

COLOR ADJ. → LUMINANCE → ABL command.

18)

Adjust ABL to 34±1FL of the luminance.

19)

Exit from the program.

5. Adjustment for Focus.

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

2) Adjust two 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