Read LG 42LN5300 / 42LN5390 (CHASSIS:LA32B) Service Manual online
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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) One of R Gain / G Gain / B Gain should be fixed at 192,
and the rest will be lowered to meet the desired value.
(5) Adj. is performed in COOL, MEDIUM, WARM 3 modes of
color temperature.
※
CASE
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
► 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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