White Balance Adjustment - LG 24LN451B Service Manual

4.4. White balance adjustment

-Equipment
1) Color Analyzer: CA-210 (LED Module : CH 14)
2) Adj. Computer(During auto adj., RS-232C protocol is
needed)
3) Adjust Remocon
RGB_Gains are fixed data for each model.
Insert RS-232C Jack which is connected with PC for White
Balance or equivalent device.
* Total Assembly line should be check whether the color
coordinate(x,y) data refer to below table were meet or not.
Color Cool 13,000k
Temperature
Medium 9,300k
Warm 6,500k
Luminance Cool Min : 80
(cd/m²)
Medium Min : 80
Warm Min : 70
*Note : x,y coordinates are drifted about 0.007 after 30 mins
heat-run. So checking color coordinate within 5-min at
total assembly line, consider x,y coordinates might be
up to 0.007 than x,y target of each color temperature.
*Note : Manual W/B process using adjusts Remote control.
1) After enter Service Mode by pushing "ADJ" key,
2) Enter "White Balance" by pushing "►" key at "White Bal-
ance".
* When doing Adjustment, Please make circumstance as
below.
Copyright © LG Electronics. Inc. All right reserved.
Only for training and service purposes
°K X=0.276 (±0.03) <Test Signal>
Y=0.275 (±0.03) Inner pattern
(204gray,80IRE)
°K X=0.290 (±0.03)
Y=0.298 (±0.03)
°K X=0.318 (±0.03)
Y=0.334 (±0.03)
Typ : 110 <Test Signal>
Inner pattern
Typ : 110
(204gray,80IRE)
Typ : 110
4.5. DPM Operation check
■ Measurement Condition: 100~240V@ 50/60Hz
1) Set Input to RGB-PC and connect D-sub cable to set –
RGB Mode. Set Input to HDMI(with Input Label set to PC)
and connect HDMI cable to set – HDMI Mode
2) Cut off H sync or V sync of signal.
3) Check DPM operation refer to the below table.
Operating Condition
Power S/W On Sleep mode -
RGB,HDMI
■ HDMI2 DPM Operating condition with MHL
-Input Label: HDMI (PC&DVI Mode)
DPM
4.6. Model Name & SW Version & Adjust
check.
* Press the 'Instart' key of ADJ remote controller
4.6.1. Model Name& SW Version Check
1) Check 'Model Name'.
2) Check 'S/W Version' (Refer to the IC Ver. in the BOM)
4.6.2. Adjust Check
1) Check 'Country Group'
2) Check 'Area Option'
3) Check 'Tool Option' (Refer to the BOM Comments)
4) Check 'Adjust ADC[Comp&RGB]' is OK.
5) Check 'EDID[RGB&HDMI]' is OK.
* After check all, Press the 'EXIT' key of ADJ remote controller
to go out SVC menu.
4.7. Outgoing condition Configuration
* After all function test., press IN-STOP Key by SVC Remote
controller. And make Outgoing Condition
- 12 -
Sync Video LED
(H/V) (SET)
Off/Off Off Amber
MHL Cable HDMI & HDMI to DVI Cable
X O
LGE Internal Use Only
Wattage
(W)
1