Text preview for : Adjustment.pdf part of LG 775FTFB775BE-Ultra Flatron 775FTFB775BE-Ultra.part2



Back to : Flatron 775FTFB775BE-Ultr | Home

ADJUSTMENT
GENERAL 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.

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 230±2mm. 13) Adjust V-POSITION as arrow keys to center of the screen. 14) Adjust H-SIZE as arrow keys to 310±2mm. 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 4 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 demagnetization of the CDT. 3) Set Brightness max and SUB-Brightness to 120 (Decimal) position. 4) Display color 0,0 pattern at Mode 4. 5) COLOR ADJ. LUMINANCE command of the alignment program. 6) COLOR ADJ. BIAS ADJ. command of the alignment program. 7) Check whether blue color or not at R-BIAS and B-BIAS to min position and G-BIAS to 130(decimal) to adjust Sub-Brightness to 0.2±0.05FL of the raster luminance. Check it's not blue color. 8) Adjust R-BIAS and B-BIAS command to x=0.283± 0.02 and y=0.298±0.02 on the White Balance Meter with PC arrow keys. 9) Adjust SUB-Brightness command to 0.3±0.1FL of the raster luminance. 10) Display color 15,0 box pattern (70x70mm) at Mode 4. 11) Set Contrast max and SUB-Contrast to max position. 12) DRIVE ADJ command. 13) Set G-DRIVE to 150 (decimal) at DRIVE of the alignment program.

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 165V±0.5Vdc with VR901. 2. Adjustment for High-Voltage. 1) Display cross hatch pattern at Mode 4. 2) Adjust Anode voltage to 26kV+0.1kV, 26kV-0.2kV with VR701. 3. Adjustment for Factory Mode (Preset Mode). 1) Display cross hatch pattern at Mode 1. 2) Run alignment program for FB775B 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.

- 14 -

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 50±1FL 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 32±1FL of the luminance. 19) Exit from the program.

5. Adjustment for Focus. 1) Set the Brightness and Contrast to max position. 2) Display H character in full screen at Mode 4. 3) Adjust two Focus control on the FBT that focus should be the best condition.

Monitor to be adjusted

A
VIDEO SIGNAL GENERATOR
d

IBM Compatible PC
15 10 5
se

9 11 6 1 5

6 1

C
13 25 1 14

tu

No

RS

23

PARALLEL PORT
5V OFF ON

Control Line

RA

C

LL

EL

2C

F
Power inlet (required)
220

PA

5V ON 4.7K 4.7K 4.7K 74LS06 74LS06

VG

S MO NI

A

CS T

Power Select Switch (110V/220V) Power LED

PO WE R

5V

R

V-S

TO

YN

E
OFF

B

E ST Switch

B
F V-Sync On/Off Switch (Switch must be ON.)

Figure 1. Cable Connection

- 15 -