55LW9800-DA (CHASSIS:LT12D) - LG TV Service Manual (repair manual). Page 14

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This spec sheet is applied to LT12C 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    Before adjustment, execute Heat-Run for 5 minutes

at RF no signal.   

1) MAC Address, ESN Key and Wide-vine Key D/L 
2) LAN Test( Ping-Test ) 
3) Main S/W program download : Using USB Memory stick 
4) Input Tool - Option 
5) Download EDID : EDID data are automatically

downloaded when adjusting the Tool Option. 

6) ADC Calibration – RGB & Component 
7) Check SW Version 

4.1.1.  Equipment & Condition  

1) Play file: keydownload.exe 
2) Key Write: Com 1,2,3,4 and 115200 (Baudrate) 
3) Barcode: Com 1,2,3,4 and 9600 (Baudrate)  

4.1.2.  Process 

1) Execute “keydownload.exe” on PC 
2) Select the download items. 
3) Mode check: Online only 
4) Check the test process 
- DETECT  MAC_WRITE  ESN_WRITE  WIDEVINE_WRITE
5) Play: START 
6) Check of result: Ready, Test, OK or NG