DOWNLOAD LG 19LV2500-UG (CHASSIS:LA01R) Service Manual ↓ Size: 7.76 MB | Pages: 46 in PDF or view online for FREE

- 13 -

5.1.1. Overview 
5.1.1.1. W/B adj. Objective & How-it-works 
(1) Objective: To reduce each Panel’s W/B deviation 
(2) How-it-works: When R/G/B gain in the OSD is at 192, it

means the panel is at its Full Dynamic Range.  In order to
prevent saturation of Full Dynamic range and data, one of
R/G/B is fixed at 192,  and the other two is lowered to find
the desired value.  

(3) Adj. condition: normal temperature 
1) Surrounding Temperature: 25±5°C 
2) Warm-up time: About 5 Min 
3) Surrounding Humidity: 20% ~ 80% 

5.1.2. Equipment 
(1) Color Analyzer: CA-210 (NCG: CH 9 / WCG: CH12 / LED:

CH14) 

(2) Adj. Computer (During auto adj., RS-232C protocol is

needed) 

(3) Adjust Remocon 
(4) Video Signal Generator MSPG-925F 720p/204-Gray

(Model: 217, Pattern: 49)  

• Color Analyzer Matrix should be calibrated using CS-1000 

5.1.3. Equipment connection 

5.1.4. Adjustment Command (Protocol)  
(1) RS-232C Command used during auto-adj. 

Ex) wb 00 00   ->  Begin white balance auto-adj. 

wb 00 10   ->  Gain adj. 
ja 00 ff   ->  Adj. data 
jb 00 c0 
... 
... 

wb 00 1f   -> Gain adj. complete  

*(wb 00 20(start), wb 00 2f(end)) -> Off-set adj. 

wb 00 ff   ->End white balance auto adj. 

(2) Adj. Map
Applied Model : 
19/22LV2500-UG

5.1.5. Adjustment method 
5.1.5.1 Auto WB calibration 
1) Set TV in adj. mode using POWER ONLY (P-ONLY) key 
2) Zero calibrate probe then place it on the center of the

Display 

3) Connect Cable(RS-232C) 
4) Select mode in adj. Program and begin adj. 
5) When adj. is complete (OK Sing), check adj. status pre

mode (Cool, Medium, Warm) 

6) Remove probe and RS-232C cable to complete adj. 

• W/B Adj. must begin as start command “wb 00 00” , and
finish as end command “wb 00 ff”, and Adj. offset if need 

5.1.5.2 Manual adj. method 
1) Set TV in Adj. mode using POWER ON 
2) Zero Calibrate the probe of Color Analyzer, then place it on

the center of LCD module within 10cm of the surface.. 

3) Press ADJ key -> EZ adjust using adj. R/C  6. White-

Balance then press the cursor to the right (KEY

G

). (When

KEY(

G

) is pressed 204 Gray(80IRE) internal pattern will be

displayed) 

4) One of R Gain / G Gain / B Gain should be fixed at 192,

and the rest will be lowered to meet the desired value. 

5) Adj. is performed in COOL, MEDIUM, WARM 3 modes of

color temperature. 

• If internal pattern is not available, use RF input. In EZ Adj.

menu 6.White Balance, you can select one of 2 Test-pattern:
ON, OFF. Default is inner(ON). By selecting OFF, you can
adjust using RF signal in 204 Gray pattern. 

Co lo r An alyzer

 

Co m p ut er

 

Pat t ern Gen erat o r

 

RS -232C 

RS -232C 

RS -232C 

Probe

Signal Source

* If TV internal pattern is used, not needed

Connection Diagram of Automatic Adjustment

RS-232C COMMAND 

[CMD       ID

            DATA] 

Explanation 

Wb 

00 

00 

Begin White Balance adj. 

Wb 

00 

ff 

End White Balance adj. (internal pattern disappears ) 

Adj.

item Command 

(lower case ASCII) 

Data Range 
(Hex.) 

Default 
(Decimal) 

 

 

CMD1 CMD2 MIN  MAX 

 

R Gain 

j 

g 

00 

C0 

172 

G Gain 

j 

h 

00 

i

00 

C0 172 

B Gain 

j

C0 

192 

R Cut 

 

64 

G 

Cut 

   

  64 

Cool 

B 

Cut 

   

  64 

Medium

j a 00 

C0 

192 

G Gain 

j 

b 

00 

C0 

192 

B Gain 

R Gain 

j c 00 

C0 

192 

R 

Cut 

   

  64 

G 

Cut 

   

  64 

B 

Cut 

   

  64 

R Gain 

j 

d 

00 

C0 

192 

G Gain 

j 

e 

00 

C0 

192 

B Gain 

j 

f 

00 

C0 

172 

R 

Cut 

   

  64 

G 

Cut 

   

  64 

Warm 

B 

Cut 

   

  64 

- 14 -

• Adj. condition and cautionary items 
1) Lighting condition in surrounding area 

Surrounding lighting should be lower 10 lux. Try to isolate
adj. area into dark surrounding. 

2) Probe location : Color Analyzer (CA-210) probe should be

within 10cm and perpendicular of the module surface (80°~
100°) 

3) Aging time 
- After Aging Start, Keep the Power ON status during 5

Minutes. 

- In case of LCD, Back-light on should be checked using no

signal or Full-white pattern. 

5.1.6 Reference (White Balance Adj. coordinate and color

temperature) 

(1) Luminance: 204 Gray, 80IRE 
(2) Standard color coordinate and temperature using CA-

210(CH 14) 

America due to rating 

• Applied model: LA01U Chassis applied None USA

model(CANADA, MEXICO) 

5.3.2 Method  
(1) Press ADJ key on the Adj. R/C, and then select Country

Group Menu 

(2) Depending on destination, select KR or US, then on the

lower Country option, select US, CA, MX.  Selection is
done using +, - KEY 

• Method: Press Adj. key on the Adj. R/C, then select Tool

option.  

5.6.1 Test equipment

(1) Pattern Generator MSHG-600 or MSPG-6100 (HDMI 1.4

support) 

(2) Pattern: HDMI mode (model No. 872, pattern No. 83) 

5.6.2 Test method
(1) Input 3D test signal as Fig.1. 

(2) Press ‘OK” key as a 3D input OSD is shown. 

(3) Check pattern as Fig2 without 3D glasses. (3D mode

without 3D glasses)

Mode

Color Coordination

Temp

∆

UV

x

y

COOL

0.285±0.002

0.293±0.002

9300K

0.0000

MEDIUM

0.295±0.002

0.305±0.002

8000K

0.0000

WARM

0.313+0.002

0.329±0.002

6500K

0.0000

Model

Tool1

Tool2

Tool3

Tool4

Tool5

Menu

22LV2500-UG 10024

18954

55337

2588

16640

AUO

19LV2500-UG 5928

18954

55337

2588

16640

AUO

Fig.1

<HDMI Mode 872, Pattern No.83

Fig.2

<OK in 3D mode without 3D glasses>

Fig.3

<NG in 3D mode without 3D glasses>

- 15 -

(1) Press  ‘TILT’ Key of the Adj. R/C and check moving

patterns. The black bar patterns moves from top to
boeeom. If a local dimming function  does not work, a
whole screen shows full white.

(1) After final inspection, press In-Stop key of the Adj. R/C and

check that the unit goes to Stand-by model.

6.1.1. GND & HI-POT auto-check preparation  

(1) Check the POWER CABLE and SIGNAL CABE

insertion condition 

6.1.2. GND & HI-POT auto-check  

(1) Pallet moves in the station. (POWER CORD / AV
CORD is tightly inserted) 
(2) Connect the AV JACK Tester. 
(3) Controller (GWS103-4) on. 
(4) GND Test (Auto)  

- If Test is failed, Buzzer operates. 
- If Test is passed, execute next process (Hi-pot test).

(Remove A/V CORD from A/V JACK BOX)  

(5) HI-POT test (Auto) 

- If Test is failed, Buzzer operates. 
- If Test is passed, GOOD Lamp on and move to next

process automatically. 

• TEST voltage

- GND: 1.5KV/min at 100mA
- SIGNAL: 3KV/min at 100mA

• TEST time: 1 second
• TEST POINT

- GND TEST = POWER CORD GND & SIGNAL CABLE

METAL GND

NEUTRAL

• LEAKAGE CURRENT: At 0.5mArms

Step 1) Turn on the TV. 
Step 2) Press EYE button in adjust remote control. 
Step 3) Stay 6 seconds with Eye Q sensor hidden located on

the front of the set. 

Step 4) Check the “Sensor Data” on the screen and check

whether the value is lower thanafter 6 seconds, the
value does not go below 10, Eye Q sensor is not
working properly. Then, change the sensor. 

Step 5) Remove hand from the Eye Q II sensor and stay for 6

seconds. 

Step 6) Check whether the “Back Light (xxx)” value has risen

on the screen. If after 6 seconds and the value still
does not go high, the eye Q II sensor is not working
properly. Replace the sensor. 

 

<Step1>

<Step2>

<Step3>

<Step4>

<Step5>

- 16 -

1.  Put the USB Stick to the USB socket  
2.  Automatically detecting update file in USB Stick 
- If your downloaded program version in USB Stick is Low, it

didn’t work.  But your downloaded version is High, USB data
is automatically detecting 

3.  Show the message “Copying files from memory” 

4.  Updating is starting. 

5.  Updating Completed, The TV will restart automatically 
6.  If your TV is turned on, check your updated version and

Tool option. (Explain the Tool option, next stage) 

* If downloading version is more high than your TV have, TV
can lost all channel data. In this case, you have to channel
recover. if all channel data is cleared, you didn’t have a
DTV/ATV test on production line. 

* After downloading, have to adjust TOOL OPTION again. 
1. Push "IN-START" key in service remote controller. 
2. Select "Tool Option 1" and Push “OK” button. 
3. Punch in the number. (Each model has their number.)