39LN549E (CHASSIS:LA3AA) - LG TV Service Manual (repair manual). Page 9

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4.2. EDID Download
4.2.1. Overview
▪  It  is  a  VESA  regulation. A  PC  or  a  MNT  will  display  an 
optimal  resolution  through  information  sharing  without  any 
necessity of user input. It is a realization of “Plug and Play”.
4.2.2. Equipment
(1)  Since EDID data is embedded, EDID download JIG, HDMI 
cable is not need.
(2) Adjust by using remote controller
4.2.3. Download method 
(1) Press Adj. key on the Adj. R/C.
(2) Select EDID D/L menu.
(3) By pressing Enter key, EDID download will begin
(4)  If Download is successful, OK is display, but If Download is 
failure, NG is displayed.
(5) If Download is failure, Re-try downloads.
   ※
Caution :  When  EDID  Download,  must  remove  HDMI 
Cable.
4.2.3.1. Models for EDID Data
2D
8bit-HD
8bit-FHD
(PCM)
32LN541C-UA
39/42/47/55
LN541C-UA
LN549E-UA
4.3. Tool Option Input
- Input Model Tool Option according to BOM
5. Final Assembly Adjustment
5.1. White Balance Adjustment
5.1.1. Overview
5.1.1.1. W/B adj. Objective & How-it-works
(1) Objective: To reduce each Panel’s W/B deviation
(2)  How-it-works:  When  R/G/B  gain  in  the  OSD  is  at  192,  it 
means the panel is at its Full Dynamic Range.
▪ Case : Cool Mode
  -  To  adjust  the  white  balance  without  the  saturation,  G  gain 
should  be  adjust  at  least  172  and  change  the  others  (R,B 
Gain)
  ※
  When R or B gain is over 255, G gain can be adjust below 
172)
▪ Case : Medium / Warm Mode
  -  To adjust the white balance without the saturation, Fix the 
one  of  R/G/B  gain  to  192  (default  data)  and  decrease  the 
others.
(3) Adj. condition: normal temperature
- Surrounding Temperature: 25±5 ºC
- Warm-up time: About 5 Min
- Surrounding Humidity: 20% ~ 80%
-  Before  White  balance  adjustment,  Keep  power  on  status, 
don’t power off
5.1.1.2. Adj. condition and cautionary items
(1)  Lighting condition in surrounding area surrounding lighting 
should  be  lower  10  lux. Try  to  isolate  adj.  area  into  dark 
surrounding.
(2)  Probe  location:  Color Analyzer  (CA-210)  probe  should  be 
within  10cm  and  perpendicular  of  the  module  surface  
(80°~ 100°)
(3) Aging time
-  After  Aging  Start,  Keep  the  Power  ON  status  during  5 
Minutes.
-  In  case  of  LCD,  Back-light  on  should  be  checked  using  no 
signal or Full-white pattern.
5.1.2. Equipment
(1)  Color Analyzer: CA-210 (NCG: CH 9 / WCG: CH12 / LED: 
CH14)
(2)  Adj.  Computer(During  auto  adj.,  RS-232C  protocol  is 
needed)
(3) Adjust Remocon
(4)  Video  Signal  Generator  MSPG-925F  720p/204-Gray 
(Model:217, Pattern:49)
      → Only when internal pattern is not available
     ※  Color  Analyzer  Matrix  should  be  calibrated  using 
CS-1000
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