Adjustment - LG LCD 782LS Service Manual

All adjustment are thoroughly checked and corrected
when the monitor leaves the factory, but sometimes
several minor adjustment may be required.
Adjustment should be following procedure and after
warming up for a minimum of 10 minutes.
• Alignment appliances and tools.
- IBM compatible PC
- Programmable Signal Generator.
(eg. VG-819 made by Astrodesign Co.)
- E(E)PROM with each mode data saved.
1. Adjustment Start
1) Display any pattern at any Mode.
2) Run alignment program for LB782G on the IBM
compatible PC.
3) Select EEPROM
4) This will make all data to default state.
5) Select COMMAND
and Enter.
D
Video Signal
Generator

ADJUSTMENT

ALL INIT command and Enter.
PRESET START command
IBM
Compatible PC
C
A Power LED
E ST Switch
B
F V-Sync On/Off Switch
(Switch must be ON.)
Figure 1. Cable Connection
2. Adjustment for White Balance
1) Display Black pattern at SXGA/60Hz.
2) Set External Bright to MAX position and Contrast to
80 Position.
3) Select PRESET START
and Enter.
4) No attempt to manually adjust, BIAS data is auto-
matically adjusted and saved to the EEPROM.
5) Display Full White pattern at SXGA/60Hz.
6) Select DRIVE CAL command and Enter.
7) 9300K are automatically adjusted and
saved to the EEPROM.
8) Select PRESET EXIT command and Enter.
3. Adjustment for EDID
1) Use this procedure only when there is some
probelm on EDID data.
2) Connect the D-sub cable.
3) Select EEPROM
Enter.
15
10
5
PARALLEL PORT
OFF ON
5V
F
Power inlet (required)
Power Select Switch
(110V/220V)
- 11 -
BIAS CAL command
EDID(A) WR command and
A
9 6
5 1
11
6
1
13
25
ON
5V
E
4.7K
OFF
74LS06
B
C
1
14
5V
4.7K
4.7K
74LS06