47LW9800-UA (CHASSIS:LA12D) - LG TV Service Manual (repair manual). Page 13

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- 13 -
ADJUSTMENT INSTRUCTION
1. Application range 
This spec. sheet applies to LA12D Chassis applied LCD TV
all models manufactured in TV factory 
2. Specification
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 still image is displayed for a period of 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. 
3. Adjustment items
3.1 Final assembly adjustment    
• EDID/DDC download   
• White Balance adjustment  
• RS-232C functionality check 
• Factory Option setting per destination 
• Ship-out mode setting (In-Stop)
3.2 Etc 
• Ship-out mode  
• Tool option menu 
• USB Download(S/W Update, Option, Service only)  
3.3. Automatic Adjustment  
3.3.1 ADC Adjustment (GP3 BCM35230) 
3.3.1.1 Overview 
• ADC adjustment is needed to find the optimum black level
and gain in Analog-to-Digital device and to compensate RGB
deviation. 
3.3.1.2 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 : 1920*1080 RGB (MSPG-925FS: model-225,
pattern-65) 
- Pattern : Horizontal 100% Color Bar Pattern 
- Pattern level : 0.7±0.1 Vp-p 
- Image  
3.3.1.3 Adjustment 
3.3.1.3.1 Adjustment method 
• Using RS-232, adjust items listed in 3.1 in the other
shown in “4.1.3.3” 
3.3.1.3.2 Adj. protocol 
Ref.) ADC Adj. RS232C Protocol_Ver1.0 
3.3.1.3.3 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 
42/47/55LW7500-NB 
Edge LED
O 
X
 
1 point W/B adjustment 
42/47/55LW7700-NA 
47/55LW7700-UA 
ALEF 
O
TB
O
D
TBD 
47/55LW9500-NA 
47/55LW9600-NA 
ALEF 
O 
X 
1 point W/B adjustment 
60LW9600-NA 
IOP LED 
O 
X 
1 point W/B adjustment 
LA12D 
47/55/60LW9500-UA 
ALEF/IOP 
LED 
O
5 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 
Display
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