32LN549E (CHASSIS:LA3AA) — LG TV Service Manual (repair manual). Page 10

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5.1.3. Equipment connection
5.1.4. Adjustment Command (Protocol)
(1) RS-232C Command used during auto-adj
RS-232C COMMAND
Explanation
CMD
DATA
ID
Wb
00
00
Begin White Balance adj.
Wb
00
ff
End White Balance adj. 
(internal pattern disappears )
(2) Adjustment Map
Adj. item
Command
(lower case ASCII)
Data Range
(Hex.)
Default
(Decimal)
CMD1
CMD2
MIN
MAX
Cool
R Gain
j
g
00
C0
172
G Gain
j
h
00
C0
172
B Gain
j
i
00
C0
192
R Cut
128
G Cut
128
B Cut
128
Medium
R Gain
j
a
00
C0
192
G Gain
j
b
00
C0
192
B Gain
j
c
00
C0
192
R Cut
128
G Cut
128
B Cut
128
Warm
R Gain
j
d
00
C0
192
G Gain
j
e
00
C0
192
B Gain
j
f
00
C0
172
R Cut
128
G Cut
128
B Cut
128
5.1.5. Adjustment method
5.1.5.1. Auto WB calibration
(1)  Set TV  in ADJ  mode  using  P-ONLY  key  (or  POWER  ON 
key)
(2) Place optical probe on the center of the display
    -  It need to check probe condition of zero calibration before 
adjustment.
(3) Connect RS-232C Cable
(4) Select mode in ADJ Program and begin a adjustment.
(5)  When  WB  adjustment  is  completed  with  OK  message, 
check  adjustment  status  of  pre-set  mode  (Cool,  Medium, 
Warm)
(6) Remove probe and RS-232C cable.
  W/B Adj.  must  begin  as  start  command  “wb  00  00”  ,  and 
finish as end command “wb 00 ff”, and Adj. offset if need.
5.1.5.2. Manual adj. method
(1) Set TV in Adj. mode using POWER ON
(2)  Zero Calibrate the probe of Color Analyzer, then place it on 
the center of LCD module within 10cm of the surface..
(3)  Press ADJ  key  ->  EZ  adjust  using  adj.  R/C  ->  6.  White-
Balance then press the cursor to the right (KEY►).
      (When  KEY(►)  is  pressed  204  Gray(80IRE)  internal 
pattern will be displayed)
(4-a)  Adjust  modes  (Cool)  :  Fix  the  G  gain  at  least  172  and 
change the others (R/B Gain).
 If R or B gain is over 255, G gain can be adjust below 172.
(4-b)  Adjust  two  modes  (  Medium  /  Warm)  :  Fix  the  one  of 
R/G/B gain to 192 (default data) and decrease the others
 CASE : Cool mode
First adjust the coordinate far away from the target value(x, y).
(1) x, y > target
(2) x, y < target
(3) x >target ,  y < target
(4) x < target ,  y > target
-  Every 4 case have to fit y value by adjusting B Gain and then 
fit x value by adjusting R-Gain 
-  In this case, increasing/decreasing of B Gain and R Gain can 
be adjusted
► How to adjust
(1)  Fix  G  gain  at  least  172  : Adjust  R,  B  Gain  (In  Case  of 
Mostly Blue Gain Saturation) 
(2)  When  R  or  B  Gain  >  255,  Release  Fixed  G  Gain  and 
Readjust
 CASE Medium / Warm
First adjust the coordinate far away from the target value(x, y).
(1) x, y > target
i) Decrease the R, G. 
(2) x, y < target
i) First decrease the B gain, 
ii) Decrease the one of the others.
(3) x > target ,  y < target
i) First decrease B, so make y a little more than the target.
ii) Adjust x value by decreasing the R
(4) x < target ,  y > target
i) First decrease B, so make x a little more than the target.
ii) Adjust x value by decreasing the G
Color Analyzer 
Computer 
Pattern Generator 
 
Signal Source 
Probe 
RS-232C 
RS-232C 
RS-232C 
If TV internal pattern is used, not needed 
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