LG 60LB5900 Service Manual page 13

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)
Color Analyzer Matrix should be calibrated using CS-1000
5.1.3. Equipment connection
5.1.4. Adjustment Command (Protocol)
(1) RS-232C Command used during auto-adj.
RS-232C COMMAND
CMD DATA ID
Wb 00 00
Wb 00 ff
(2) Adjustment Map
Adj. item Command
(lower caseASCII)
CMD1
Cool R Gain j
G Gain j
B Gain j
Medium R Gain j
G Gain j
B Gain j
Warm R Gain j
G Gain j
B Gain j
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Only for training and service purposes
Explanation
Begin White Balance adj.
End White Balance adj.
(internal pattern disappears )
Data Range
(Hex.)
CMD2 MIN MAX
g 00 C0
h 00 C0
i 00 C0
a 00 C0
b 00 C0
c 00 C0
d 00 C0
e 00 C0
f 00 C0
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.
finish as end command "wb 00 ff", and Adj. offset if need
5.1.5.2. Manual adjustment
(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..
pattern will be displayed)
(4-a) Adjust modes (Cool) : Fix the G gain at least 172 and
change the others (R/B Gain).
(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).B
(1) x, y >target
(2) x, y< target
(3) x >target , y< target
(4) x < target , y >target
- In this case, increasing/decreasing of B Gain and R Gain
can be adjusted.
(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 mode
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
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