Text preview for : Adjustment.pdf part of LG 775FT FB775F-EA Flatron 775FT FB775F-EA
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ADJUSTMENT
GENERAL INFORMATION
All adjustment are thoroughly checked and corrected 7) Adjust tilt as arrow keys to be the best condition
when the monitor leaves the factory, but sometimes 8) DIST. ADJ. BALANCE command.
several adjustments may be required. 9) Adjust parallelogram as arrow keys to be the best
Adjustment should be following procedure and after condition.
warming up for a minimum of 30 minutes. 10) DIST. ADJ. BALANCE command.
11) Adjust balance of side-pincushion as arrow keys to
· Alignment appliances and tools. be the best condition.
- IBM compatible PC. 12) DIST. ADJ. FOS. ADJ command.
- Programmable Signal Generator.
13) Adjust V-SIZE as arrow keys to 230±2mm.
(eg. VG-819 made by Astrodesign Co.)
14) Adjust V-POSITION as arrow keys to center of the
- EPROM or EEPROM with saved each mode data.
- Alignment Adaptor and Software. screen.
- Digital Voltmeter. 15) Adjust H-SIZE as arrow keys to 310±2mm.
- White Balance Meter. 16) Adjust H-POSITION as arrow keys to center of the
- Luminance Meter. screen.
- High-voltage Meter. 17) Adjust S-PCC (Side-Pincushion) as arrow keys to be
the best condition.
AUTOMATIC AND MANUAL DEGAUSSING 18) Adjust TRAPEZOID as arrow keys to be the best
The degaussing coil is mounted around the CDT so that condition.
automatic degaussing when turn on the monitor. But a 19) PRESET EXIT Y (Yes) command.
monitor is moved or faced in a different direction, become
poor color purity cause of CDT magnetized, then press 4. Adjustment for White Balance and Luminance.
DEGAUSS on the OSD menu.
1) Set the White Balance Meter.
ADJUSTMENT PROCEDURE & METHOD 2) Press the DEGAUSS on the OSD menu for demagnetization
- Install the cable for adjustment such as Figure 1and run of the CDT.
the alignment program on the DOS for IBM compatible PC. 3) Set EXT- Brightness max and Sub-Brightness to 120
- Set external Brightness and Contrast volume to max position. (78h) position.
4) Display color 0,0 pattern at Mode 4.
1. Adjustment for B+ Voltage. 5) COLOR ADJ. LUMINANCE command of the
1) Display cross hatch pattern at Mode 4. alignment program.
2) Adjust C961 (+) voltage to 49V ± 0.5V with VR901. 6) COLOR ADJ. BIAS ADJ. command of the
alignment program.
2. Adjustment for High-Voltage. 7) Check whether R-BIAS and B-BIAS to min position
1) Display cross hatch pattern at Mode 4. and G-BIAS to 0.2±0.05FL of the raster luminance.
2) Adjust Anode voltage to 25.8kV+0.1kV. Check it's not green color.
8) Adjust R-BIAS and B-BIAS command to x=0.283±
3. Adjustment for Factory Mode (Preset Mode). 0.015 and y=0.298 ±0.015 on the White Balance
1) Display cross hatch pattern at Mode 1~4. Meter with PC arrow keys.
2) Run alignment program for FB775F on the 9) Adjust SUB-Brightness command to 0.3±0.1FL of the
IBM compatible PC. raster luminance.
3) EEPROMALL CLEARY(YES) command. 10) Display color 15,0 window pattern (70x70mm) at Mode 4.
Do not run this procedure unless the 11) Set Contrast max and SUB-Contrast to 105 (69)
EEPROM is changed. position.
All data in EEPROM (mode data and color data)will 12) DRIVE ADJ command.
be erased. 13) Set G-DRIVE to 90(5A) (decimal) at DRIVE of the
4) Power button of the monitor turn off turn on. alignment program.
5) COMMAND START Y(Yes) command. 14) Adjust R-DRIVE and B-DRIVE command to white
6) DIST. ADJ. TILT command. balance x=0.283±0.015 and y=0.298±0.015 on the
White Balance Meter with PC arrow keys.
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15) Adjust SUB-CONTRAST command to 50±1FL of the 5. Adjustment for Focus.
raster luminance at the save in color 1.
1) Display H character in full screen at Mode 4.
16) Display color 15,0 full white patten at Mode 4.
2) Adjust two Focus control on the FBT that focus
17) COLOR ADJ. LUMINANCE ABL command. should be the best condition.
18) Adjust ABL to 32±1FL of the luminance.
19) Exit from the program.
Monitor to be
adjusted
A
VIDEO IBM
Compatible PC 9 6
SIGNAL 5 1
15 11
GENERATOR 10 6
5 1
C
d
se
tu
PARALLEL PORT
2C
13
No
1
23
RS
25 14
OFF ON
EL
Control Line
5V
LL
C
RA
F
PA
Power inlet (required)
220 5V
Power Select Switch
R
VG
WE
S 4.7K
(110V/220V)
PO
ON 5V 4.7K
A
ST
MO Power LED E
NC
NI
TO 74LS06
Y
V-S
R 4.7K
OFF
74LS06
E ST Switch
B
B
F V-Sync On/Off Switch
(Switch must be ON.)
Figure 1. Cable Connection
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