DOWNLOAD LG 37LK450 (CHASSIS:LA01U) Service Manual ↓ Size: 11.52 MB | Pages: 72 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 : 
32/37/42/47LK450-UB, 32/42/47LK450-NA, 32/42/47LK451-
NB, 32/42/47LK452-NC,32LK330-UB, 32/42LK430-UA,
42/47/55LK520-UA, 32LK330-NB, 42LK430-NA,
42/47/55LK530-NA  

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 CS-1000

(over 26 inch) 

• Standard color coordinate and temperature using CA-

210(CH 9) 

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.  

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

check that the unit goes to Stand-by mode. 

Mode

Color Coordination

Temp

∆

UV

x

y

COOL

0.269

0.273

13000K

0.0000

MEDIUM

0.285

0.293

9300K

0.0000

WARM

0.313

0.329

6500K

0.0000

Mode

Color Coordination

Temp

∆

UV

x

y

COOL

0.269±0.002

0.273±0.002

13000K

0.0000

MEDIUM

0.285±0.002

0.293±0.002

9300K

0.0000

WARM

0.313+0.002

0.329±0.002

6500K

0.0000

32LK450-UB 

18056 19478 55308

2332 

290  AUO 

37LK450-UB 

22152 19478 55306

2332 

290  AUO 

37LK450-UB 

22144 19478 55307

2332 

8450  LGD 

42LK450-UB 

26248 19478 55305

2332 

290  AUO 

42LK450-UB 

26240 19478 55305

2332 

8450  LGD 

32LK430-UA 

18024 19478 51209

2328 

290  AUO 

32LK430-UA 

18016 19478 51209

2328 

8482  LGD 

42LK430-UA 

26216 19478 51209

2328 

290  AUO 

42LK430-UA 

26208 19478 51209

2328 

8450  LGD 

42LK430-NA 

26208 19478 51209

2328 

8194  LGD 

26LK330-UB 

13896 18966 51209

2328 

290  AUO 

26LK330-NB

18966 51209

2328 

34 

AUO

32LK330-UB 

17992 18966 55307

2332 

290  AUO 

32LK330-UB 

17984 18966 55305

2332 

290  LGD 

32LK330-NB

18966 51209

2328 

34 

LGD

32LK330-NB 

18000 18966 51209

2328 

34 

IPS 

42LK520-UA 

26272 19478 55305

2332 

8450  LGD 

42LK530-NA 

26304 19478 55305

2328 

8194  LGD 

47LK520-UA 

34464 19478 55305

2332 

8450  LGD 

47LK530-NA 

34496 19478 55305

2328 

8194  LGD 

55LK520-UA 

46752 19478 55305

2332 

8482  LGD 

55LK530-NA 

46784 19478 55305

2328 

8226  LGD 

32LK450-NA 
32LK451-NB 
32LK452-NC 

18048 19478 55305

2328 

8226  LGD 

42LK450-NA 
42LK451-NB 
42LK452-NC 

26240 19478 55305

2328 

8194  LGD 

47LK450-UB 

34432 19478 55305

2332 

8450  LGD 

47LK450-NA 
47LK451-NB 
47LK452-NC 

34432 19478 55305

2328 

8194  LGD 

13896

17984

- 15 -

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.)