LG LM805L-WL, Service Manual

Page: 15 / 49

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ADJUSTMENT
DVI-D Connector
220
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
V-Sync On/Off Switch
(Switch must be ON.) F
A
B
C
5V
E
F
A
B
C
15
10
5
5
6 9
1
1
1
14
13
25
6
5V
5V
4.7K
4.7K
4.7K
74LS06
74LS06
OFF ON
OFF
ON
11
Figure 1. Cable Connection
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 30 minutes.
• Alignment appliances and tools.
- IBM compatible PC
- Programmable Signal Generator.
(eg. VG-819 made by Astrodesign Co.)
- Oscilloscope.
- White Balance Meter. (CA-110)
1. Adjustment for Factory Preset Mode
No read to adjust FOS data for Factory Preset Mode.
2. Adjustment for White Balance
1) Set External Bright to MAX position and Contrast to
MAX position.
2) Display Color 0,0 pattern at Mode 15.
3) Press Menu key, Vp key, Right key of Remote
controller or Menu Buttons in sequence.
4) Select “WHITE BALANCE ADJUST” and Press SET
key.
5) After “INPUT WHITE PATTERN” message, Display
Color 15, 0 pattern at Mode 15.
6) No attempt to manually adjust, BIAS and Drive data
is automatically adjustde and saved to the EEPROM.
7) After “OK” message, Press SET KEY.
8) Select “SERVICE MODE EXIT” and Press SET KEY.
3. DDC Data Write Procedure-Analog
1) Use this procedure only when there is some
problem on Analog EDID data.
2) Run alignment program for LM805L on the IBM
compatible PC.
3) Select EEPROM
→
Analog EDID write command
and Enter.
4) This will write the Analog EDID data to EEPROM.
4. DDC Data Write Procedure-Digital
1) Use this procedure only when there is some
problem on Digital EDID data.
2) Run alignment program for LM805L on the IBM
compatible PC.
3) Select EEPROM
→
Digital EDID write command
and Enter.
4) This will write the Digital EDID data to EEPROM.