47LW6500-UA (CHASSIS:LA12C) - LG TV Service Manual (repair manual). Page 12

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This spec. sheet applies to LA12C Chassis applied LCD TV
all models manufactured in TV factory .

2.1   Because this is not a hot chassis, it is not necessary

to use an isolation transformer. However, the use of
isolation transformer will help protect test instrument.  

2.2   Adjustment must be done in the correct order.  
2.3  The adjustment must be performed in the

circumstance of  25±5°C of temperature and 65±10%
of relative humidity   

2.4   The input voltage of the receiver must keep

100~240V~, 50/60Hz.  

2.5    The receiver must be operated for about 5 minutes

prior to the adjustment when module is in the
circumstance of over 15. In case of keeping module
is in the circumstance of 0°C, it should be placed in
the circumstance of above 15°C for 2 hours  In case
of keeping module is in the circumstance of below -
20°C, it should be placed in the circumstance of
above 15°C for  3 hours. 

• Caution 
When a still image is displayed for 20 minutes or longer
(especially where W/B scale is strong.  Digital pattern 13ch
and/or Cross hatch pattern 09ch), there can some
afterimage in the black level area. 

(1) ADC adjustment: Component 480i, 1080p / RGB-PC 1080p
(2) EDID downloads for HDMI and RGB-PC 

• Remark 

- Above adjustment items can be also performed in Final

Assembly if needed. Adjustment items in both PCBA and
final assembly stages can be checked by using the
INSTART Menu  1.ADJUST CHECK. 

(1) White Balance adjustment 
(2) RS-232C functionality check 
(3) Factory Option setting per destination 
(4) Shipment mode setting (IN-STOP) 
(5) GND and HI-POT test  

(1)Tool option menu, USB Download (S/W Update, Option

and Service only) 

(2) Manual adjustment for ADC calibration and White balance. 
(3) Shipment conditions, Channel pre-set 

4.1.1. Overview 
• ADC adjustment is needed to find the optimum black level

and gain in Analog-to-Digital device and to compensate RGB
deviation. 

4.1.2. Equipment & Condition 
1) Jig (RS-232C protocol) 
2) MSPG-925 Series Pattern Generator(MSPG-925FS) 

- Resolution : 480i Comp1 (MSPG-925FS: model-209,

pattern-65) 

- Resolution : 1080p Comp1 (MSPG-925FS: model-225,

pattern-65) 

- Resolution : 1080p RGB (MSPG-925FS: model-225,

pattern-65) 

- Pattern : Horizontal 100% Color Bar Pattern 
- Pattern level : 0.7±0.1 Vp-p 
- Image  

4.1.3. Adjustment 
4.1.3.1 Adjustment method  
• Using RS-232, adjust items listed in 3.1 in the other

shown in “4.1.3.3” 

4.1.3.2 Adj. protocol  
Ref.) ADC Adj. RS232C Protocol_Ver1.0 

4.1.3.3. Adj. order 
• aa 00 00  [Enter ADC adj. mode] 
• xb 00 40  [Change input source to Component1

(480i/1080p)] 

• ad 00 10  [Adjust 480i//1080p Comp1] 
• xb 00 60  [Change input source to RGB(1920*1080)] 
• ad 00 10  [Adjust 1920*1080 RGB] 
• ad 00 90  End adj. 

Chassis 

Model Name 

Module type Local dimming THX

Remark 

47/55/65LW6500-UA 

32/42/47/55LW5700-UE 

42/47/55LW5600-UA 

42/47/55LW5700-NA 

LA12C 

42/47/55LW6500-NB 

Edge LED 

O 

(Except AUO) 

X  1 point W/B adjustment 

Protocol

 Command 

Set ACK 

Enter adj. mode 

aa 00 00 

a 00 OK00x 

Source change 

xb 00 40 
xb 00 60  

b 00 OK40x (Adjust 480i /1080p Comp1 ) 
b 00 OK60x (Adjust 1920*1080 RGB) 

Begin adj. 

ad 00 10 

 

Return adj. result 

 

OKx (Case of Success) 
NGx (Case of Fail) 

Read adj. data 

(main) 
ad 00 20  
 
(sub ) 
ad 00 21 

(main) 
000000000000000000000000007c007b006dx 
 
(Sub) 
000000070000000000000000007c00830077x 

Confirm adj. 

ad 00 99 

NG 03 00x (Fai l)
NG 03 01x (Fai l)
NG 03 02x (Fai l)
OK 03 03x (Success) 

End adj. 

aa 00 90 

a 00 OK90x