DOWNLOAD LG 32LV2500-UG (CHASSIS:LA01M) Service Manual ↓ Size: 10.34 MB | Pages: 51 in PDF or view online for FREE

- 17 -

4.2.4.2.1.2. 8BIT 

4.2.4.2.2. HD Model 

- 18 -

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% 
4) Before White balance adjustment, Keep power on status,

don’t power off 

5.1.1.2. 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. 

5.1.2. 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) 

-> Only when internal pattern is not available 

* 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. 

(2) Adjustment Map 

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 

TBD

TBD

TBD

TBD

TBD

TBD
TBD

TBD
TBD
TBD

TBD
TBD

TBD

TBD

TBD

TBD

TBD

TBD

G Gain 

j 

h 

00 

i

00 

C0 

B Gain 

j

C0 

R Cut 

 

G 

Cut 

   

 

Cool 

B 

Cut 

   

 

Medium

j a 00 

C0 

G Gain 

j 

b 

00 

C0 

B Gain 

R Gain 

j c 00 

C0 

R 

Cut 

   

 

G 

Cut 

   

 

B 

Cut 

   

 

R Gain 

j 

d 

00 

C0 

G Gain 

j 

e 

00 

C0 

B Gain 

j 

f 

00 

C0 

R 

Cut 

   

 

G 

Cut 

   

 

Warm 

B 

Cut 

   

 

- 19 -

5.1.5. Adjustment method 
5.1.5.1 Auto WB calibration 
(1) Set TV in ADJ mode using P-ONLY key (or POWER ON

key)  

(2) Place optical probe on the center of the display 

- It need to check probe condition of zero calibration before

adjustment.  

(3) Connect RS-232C Cable  
(4) Select mode in ADJ Program and begin a adjustment.  
(5) When WB adjustment is completed with OK message,

check adjustment status of pre-set mode (Cool, Medium,
Warm)  

(6) Remove probe and RS-232C cable.  

• 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. 

5.1.6 Reference (White Balance Adj. coordinate and color

temperature) 

•  Luminance: 204 Gray, 80IRE 
•  Standard color coordinate and temperature using CS-1000

(over 26 inch) 

• Standard color coordinate and temperature using CA-

210(CH 14) 

• Standard color coordinate and temperature using CA-

210(CH-14) – by aging time 

* Only Edge-LED LGD Module 

5.2.2. Country Group selection   
(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  

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

- 20 -

5.2.3. Tool Option inspection    
• Press Adj. key on the Adj. R/C, then select Tool option.

(1) Check the POWER CABLE and SIGNAL CABE insertion

condition 

(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.   

 

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