Adjustment - LG LB504N-XL 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.
- Alignment Adapter and Software.
1. Adjustment for Factory Preset Mode
1) Run alignment program for LB504N on the IBM
compatible PC.
2) Select EEPROM All Init. command and Enter.
3) Display cross hatch pattern at Mode 1.
4) Select EDID WRITE command and Enter.
Video Signal
Generator

ADJUSTMENT

IBM
Compatible PC
C
Power Select Switch
(110V/220V)
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 color 0,0 pattern at Mode 13.
2) Set External Bright to MAX position and Contrast to
MAX Position.
3) Select PRESET START → BIAS CAL command
and Enter.
4) No attempt to manually adjust, BIAS data is auto-
matically adjusted and saved to the EEPROM.
5) Display color 15,0 pattern at Mode 13.
6) Select DRIVE CAL command and Enter.
7) Color 1 (9300K) and Color 2 (6500K) are
automatically adjusted and saved to the EEPROM.
8) Select PRESET EXIT command and Enter.
15
10
5
PARALLEL PORT
OFF ON
5V
F
Power inlet (required)
- 13 -
A
9 6
5 1
11
6
1
13
25
5V
ON
5V
E
4.7K
OFF
74LS06
B
C
1
14
4.7K
4.7K
74LS06