LG OLED55B6 Series Service Manual page 23

▪ RS-232C Command used during auto-adjustment.
RS-232C COMMAND
[CMD ID DATA]
wb 00 00
wb 00 10
wb 00 1f
wb 00 20
wb 00 2f
wb 00 ff
Ex) wb 00 00 → Begin white balance auto-adj.
wb 00 10 → Gain adj.
ja 00 ff → Adj. data
jb 00 c0
...
...
wb 00 1f -> Gain adj. complete
*(wb 00 20(Start), wb 00 2f(end)) → Off-set adj.
wb 00 ff -> End white balance auto-adj.
▪ Adj. Map
Adj. Command
(lower
caseASCII)
CMD1 CMD2
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
4.2.5. Adj. method
(1) Auto adj. method
1) Set TV in adj. mode using POWER ON key.
2) Zero calibrate probe then place it on the center of the
Display.
3) Connect Cable.(RS-232C to USB)
4) Select mode in adj. Program and begin adj.
5) When adj. is complete (OK Sign), check adj. status pre
mode.(Warm, Medium, Cool)
6) Remove probe and RS-232C cable to complete adj.
▪ W/B Adj. must begin as start command "wb 00 00", and
finish as end command "wb 00 ff", and Adj. offset if need.
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Only for training and service purposes
Explanation
Begin White Balance adj.
Gain adj.(internal white pattern)
Gain adj. completed
Offset adj.(internal white pattern)
Offset adj. completed
End White Balance adj.
(internal pattern disappears)
Data Range Default
(Hex.) (Decimal)
MIN MAX
g 00 C0 TBD
h 00 C0 TBD
i 00 C0 TBD
a 00 C0 TBD
b 00 C0 TBD
c 00 C0 TBD
d 00 C0 TBD
e 00 C0 TBD
f 00 C0 TBD
(2) Manual adjustment 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 10 cm of the surface.
3) Press ADJ key → EZ adjust using adj. R/C → 7. White-
Balance then press the cursor to the right(key ►).
(When right key(►) is pressed 216 Gray 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) Adjustment is performed in COOL, MEDIUM, WARM 3
modes of color temperature.
** G-fix adjustment
Adjust modes (Cool), Fix the G gain to 172 (default data)
and change the others (G/B Gain).
Adjust two modes(Medium / Warm), Fix the one of R/G/B
gain to 192 (default data) and decrease the others.
If internal pattern is not available, use RF input. In EZ Adj.
menu 7.White Balance, you can select one of 2 Test-
pattern: ON, OFF. Default is inner(ON). By selecting OFF,
you can adjust using RF signal in 216 Gray pattern.
▪ Adjustment 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
- PDP: Color Analyzer (CA-100, CA-100+, CA210) probe
should be firmly attached to the Module
- LCD: 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.
4.2.6. Reference(White balance adjusmtment
coordinate and color temperature)
▪ Luminance : 206 Gray
▪ Standard color coordinate and temperature using CS-1000
(over 26 inch)
Coordinate
Mode
x
Cool 0.271
Medium 0.286
Warm 0.313
▪ Standard color coordinate and temperature using CA-210(CH 14)
Mode
x
Cool 0.271±0.002
Medium 0.286±0.002
Warm 0.313±0.002
- 23 -
Temp
y
0.270 13000K
0.289 9300K
0.329 6500K
Coordinate
Temp
y
0.270±0.002 13000K
0.289±0.002 9300K
0.329±0.002 6500K
LGE Internal Use Only
∆uv
0.0000
0.0000
0.0000
∆uv
0.0000
0.0000
0.0000