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Copyright
2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
ADJUSTMENT INSTRUCTION
1. Coverage
Apply to 19" monitor made in Monitor Factory(Kumi Korea) or
made in accordance with the standard of Kumi Factory
process.
2. Appointment
2.1 Adjustment must be done as fixed sequence, and
adjustment sequence can be modified after agreement
with the responsible R&D engineer considering mass-
production condition.
2.2 Power : AC100~240 Voltage (Free)
2.3 Input signal : As Product Standard (Signal ROM :
LB800K Ver1.6)
2.4 Warm-up Time : Over than 30 minutes
2.5 Adjustment equipment : White balance equipment (CA-
110), Display adjust equipment, VG-813(or VG819),
Oscilloscope, PC (More than 486 computer ) & White
balance adjust program.
3. Adjustment
3.1 Overview
Use factory automation equipment and adjust automatic
movement. But, do via passivity adjust in error
occurrence.
3.2 Adjustment order(refer to the Adjustment standard and
adjustment command table)
3.2.1 Board Assembly Line
Connect input signal to 15pin D-sub.
Check the firmware version & model name. And
write the firmware code to the serial Flash ROM by
ISP.
Ready for adjustment : check whether adjustment
command works normally or not and the operating
state of each mode.
Check the display state of gray color when 256 gray
scale pattern is embodied.
Read by EEPROM Read Command to check
whether initial value is correct or not.
3.2.2 Total Assembly Line
Input analog signal. (1280x1024@60Hz)
Write HDCP Key to EEPROM(24C16) by using
DDC2AB protocol & HDCP Adjusting Jig equipment
(Address 0xAC 80, 292 bytes)
If error is occurred, write and check again.
Ready : Heat-run during 30 minutes in the state with
signal.
Connect input signal to D-sub.
Default value before adjustment : Contrast "70" ,
Brightness "100(Max)"
3.2.3 Adjustment of Horizontal/Verticality screen position,
Clock and Clock Phase at each Mode.
There is no special factory mode adjustment.
Writing initial value of EEPROM in Board Assembly
line is adjusting Preset Mode and Reset mode.
(EEPROM is initialized when AC Power is ON first.)
If the change of FOS data is needed after M.P, it is
possible by writing Mode Data with EEPROM write
command or modifying the Mode Data in MICOM
itself.
# Caution) Must keep power-on more than 3 seconds after
AC Power-on first time.
3.2.4 Color coordinates adjustment and Luminance
adjustment.
3.2.4.1 Color coordinates adjustment
Monitor Contrast / Brightness
- Contrast : 70
- Brightness : 100(Max)
CA-110 : Set "Channel 9"
Signal Generator : At cut-off and drive ‡ 16 step
pattern for ADC (Program No.: 31)
- Output Voltage : 700 mVp-p
- Output Mode : Mode 12 ( SXGA 60 Hz)
mode Setting.
3.2.4.2.Adjustment : Board Assembly Line
Input 16 step pattern for ADC (Program No.31
(Mode 12,Pattern 11)). (Video level : 700mVp-p)
Adjust by commanding AUTO_COLOR_ADJUST
Confirm "Success" message in Screen or Check
the data of 0xFE,0xFF address of
EEPROM(0xA6) is 0xAA after waiting 5 seconds.
If there is "FAULT" message or the data of
0xFE,0xFF address of EEPROM(0xA6) is not
0xAA, do adjust again.
If all Adjustment is completed, the values of
6500K, User Color and 9300K are saved
automatically.
3.2.4.3. Confirm at Total Assembly Line: adjustment
Check the data of 0xFE,0xFF address of
EEPROM(0xA6) is 0xAA.
If the data of 0xFE,0xFF address of
EEPROM(0xA6) is not 0xAA, do adjust again by
3.2.4.2.
3.2.4.4. Adjust PRESET 9300K Color coordinates and
Adjust PRESET 6500K Color coordinates .
Set as Aging mode ON, by commanding
AGING_ON/OFF command code.
Select Module that is being used in present
production by commanding MODULE SELECT.
Send SYSTEM RESET command to set Module
data.
Input Full White Pattern (Video level : 700 mVp-p)
Set as 9300K by commanding
COLOR_MODE_CHANGE Command code.
Adjust to meet x = 0.283 °æ 0.004,
y=0.298°æ0.004, and confirm.
Save 9300K Color by commanding COLOR
SAVE Command code.
Set as 6500K by commanding
COLOR_MODE_CHANGE Command code.
At first, Check °‚uv.
If °‚uv is under 0.005, Do not any adjustment.
If not. Adjust to meet x=0.313°æ0.007,
y=0.329°æ0.007
Save 6500K Color by commanding COLOR
SAVE Command code.
Set as sRGB by commanding
COLOR_MODE_CHANGE Command code.
Adjust to meet Y = 180 °æ 10, and confirm.
Save sRGB Color by commanding COLOR SAVE
Command code.
