50PA4900-SD (CHASSIS:PB21A) - LG TV Service Manual (repair manual). Page 11

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7. Default Service option.
7.1. ADC-Set.
■ R-Gain adjustment Value (default  128)
■ G-Gain adjustment Value (default  128)
■ B-Gain adjustment Value (default  128)
■ R-Offset adjustment Value (default  128)
■ G-Offset adjustment Value (default  128)
■ B-Offset adjustment Value (default  128)
7.2. White balance. Value.
7.3. Temperature Threshold
■ Threshold Down Low 
20
■ Threshold Up Low      
23
■ Threshold Down High 
70
■ Threshold Up High   
75
8. Touch Pen Operating check
 
      (Pen touch model only)
- applied model : 42/50PA4900 ,50/60PA6900
(1)  Press Pen mode hot key to insert check mode in POWER 
ONLY condition. 
(Green Pen mode key on center of remocon)
(2)  Pen check mode : You can see a 2X5 matrix. (Checker 
have to use right-hand.)
(3)  2X5 Matrix construction : When the screen is divided by 
fixel in 16:9, matrix is applicable 14th,15th fixel in row, 3rd 
~ 7th fixel in colume. And they are numbered from 1 to 10. 
(TV & Jig Monitor is numbered samely.)
(4)  When checker touched a box numbered 3 of Pen touch 
TV, same box of JIG monitor blinks three times.
9. USB DOWNLOAD(*.epk file download)
■ Put the USB Stick to the USB socket
■ Press Menu key, and move OPTION 
■ Press “FAV” Press 7 times
■ Select download file (epk file)
■ After download is finished, remove the USB stick.
■  Press “IN-START” key of ADJ remote control, check the 
S/W version.
Center(Default)
COOL
Mid
Warm
R Gain
192
192
192
G Gain
192
192
192
B Gain
192
192
192
R Cut
64
64
64
G Cut
64
64
64
B Cut
64
64
64
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