DOWNLOAD LG 55LV5400 (CHASSIS:LA12E) Service Manual ↓ Size: 7.95 MB | Pages: 79 in PDF or view online for FREE

- 13 -

5.1.1. Overview 
5.1.1.1. W/B adj. Objective & How-it-works

- Objective: To reduce each Panel’s W/B deviation
- 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.   

- Adj. condition : normal temperature

1) Surrounding Temperature: 25±5ºC
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 

• Lighting condition in surrounding area surrounding lighting

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

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

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

• Aging time 

1) After Aging Start, Keep the Power ON status during

5 Minutes. 

2) 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/216-Gray

(Model:217, Pattern:78) 

-> Only when internal pattern is not available

5.1.3. Equipment connection 

5.1.4. Adjustment Command (Protocol) 

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

2) Adjustment Map

5.1.5. Adjustment method 

• Auto adj. method

1) Set TV in adj. mode using POWER ON 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 (Warm, Medium, Cool)

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 

5.1.6 Reference (White Balance Adj. coordinate and color
temperature) 

• Luminance: 216 Gray
• Standard color coordinate and temperature using CS-

1000 

• Standard color coordinate and temperature using CA-210

(CH 14)

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

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

- 14 -

• Standard color coordinate and temperature using CA-

210(CH 14) – by aging time 

1) Edge/IOP LED models 

•  THX Adjustment (THX certified model only) 

Several THX certified models have to adjust White
Balance 5 point at warm mode only. 

1) Adjust 100 IRE White Balance 
2) Adjust Max Brightness of Back Light Unit to approach

120cd. 

3) Adjust Gamma 2.2 IRE(80, 60, 40, 20) with Max

Brightness. 

4) Set R, G, B Gain at 10 IRE to 0, 0, 0 
5) Complete 5 Point Gamma and White Balance

Adjustment  

5.2.1. Overview 

•  Tool option selection is only done for models in Non-USA

• Applied model: LA12E Chassis applied to CANADA and

MEXICO 

5.3.1. Edge LED models with local dimming 
(1) Press  ‘TILT” key of the Adj. R/C and check moving

patterns. The black bar patterns moves from left to right.    

If local dimming function does not work, a whole screen
shows full white. 

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

check that the unit goes to Stand-by mode. 

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

Model 

Tool 1  Tool 2  Tool 3

Tool 4  Tool 5  Tool 6

42LV5500 32998 

4161 7295 21897 8781 665 

47LV5500 33000 

4161 7295 21897 8781 665 

55LV5500 33003 

4161 7295 21897 8781 665 

42LV5500_AUO 37094 4161  7295 21897  8781  665 

55LV5500_AUO 37099 4161  7295 21897  8781  665 

- 15 -

(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 staring.

(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

- 16 -

2.1.1. 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 

1) After Aging Start, Keep the Power ON status during 5 Minutes. 
2) In case of LCD, Back-light on should be checked using no signal or Full-white pattern. 

2.1.2 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/216-Gray (Model: 217, Pattern: 78)  

2.1.3 Adjustment    
(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 216 Gray 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 216 Gray pattern. 

2.2.1. Audio input condition     

(1) RF input: Mono, 1KHz sine wave signal, 100% Modulation 
(2) CVBS, Component: 1KHz sine wave signal (0.4Vrms) 
(3) RGB PC: 1KHz sine wave signal (0.7Vrms) 

2.2.2. Specification