42LV5400 (CHASSIS:LA12E) - LG TV Service Manual (repair manual). Page 14

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• 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