LG 50PC1D Service Manual page 14

9. Adjustment of White Balance
9-1. Required Equipment
(1) Color analyzer (CA-100 or similar product)
(2) Automatic adjustor (with automatic adjustment hour
necessity and the RS-232C communication being possible)
9-2. Connection Diagram of Equipment
for Measuring
216 FULL WHITE
<Fig. 6> Connection Diagram of Automatic Adjustment
9-3. Process of automatic adjustment
(1) As using the white pattern for adjustment the inner part,
HDMI connection need not. But as lower part, the RS-232C
Command is used.
Wb 00 00 Automatic adjustment of white balance start.
Wb 00 10 The start of gain adjustment.(inside pattern)
Ja 00 ff Adjustment Date.
Jb 00 c0
...
Wb 00 1f The end of gain adjustment.
As occasion demands , adjust the offset.
( Wb 00 20(Start) , Wb 00 2f(end))
Wb 00 ff Automatic adjustment of white balance end.
(Disappear the inside pattern)
Caution) When you adjust, automatically, RS-232C
Command is used.
wb 00
00 Automatic adjustment of white balance start.
wb 00
10 The start of gain adjustment.(inside white pattern)
00
wb 1f
The end of gain adjustment.
wb 00 20
The start of Offset adjustment.(inside white pattern)
wb 00
2f The end of Offset adjustment.
wb 00
ff Automatic adjustment of white balance end.
(Disappear the inside pattern)
(Automatic Adjustment)
COLOR
ANALYZER
TYPE; CA-100
CVBS Part
PDP MONITOR
[ [ RS-232C Command
RS-232C COMMAND
[CMD ID DATA]
Cool Mid
R Gain Jg Ja
G Gain Jh Jb
B Gain Ji Jc
R Offset lp
G Offset lq
B Offset lr
9-4. Adjustment of White Balance
(Automatic Adjustment)
Calibrate of the CA-100, then attach sensor to PDP module
O
surface when you adjust.
Manual adjustment is also possible by the following sequence.
O
(1) HEAT RUN at least 30 minutes by pressing the Power only
Key on the Service Remote Control and adjust. and use
power only or tint key and establish BaudRate to 115200.
(2) It must start "
(3) Adjust offset.
9-5. Adjustment of White Balance
(Passivity Adjustment)
(1) HEAT RUN at least 30 minutes by pressing the '7. White-
Pattern' on the Service Remote Control and adjust.
(2) After attaching sensor to center of screen, select '6. White-
Balance' of 'Ez - Adjust' by pressing the ADJ KEY on the
Service R/C. Then enter adjustment mode by pressing the
Right KEY (G). This time white pattern is displayed.
(3) Adjust the High Light using R Gain/G Gain - [Cool].
(B Gain 192, R-Cut/G-Cut/B-Cut: 63/63/65 Fix.)
Adjust the High Light using G Gain/B Gain - [Medium].
(R Gain 192, R-Cut/G-Cut/B-Cut: 65/64/66 Fix.)
Adjust the High Light using G Gain/B Gain - [Warm].
(R Gain 192, R-Cut/G-Cut/B-Cut: 64/64/65 Fix.)
(4) Adjust using Volume +/- KEY.
Value of bright : High Level -> 216gray
[Cool]
X; 0.278±0.0015 Y; 0.279±0.0015
Color temperature: 11000°K ±1000°K
dUV: -3dUV
[Medium]
X; 0.287±0.0015 Y; 0.289±0.0015
Color temperature: 9300°K±1000°K
dUV: -3dUV
[Warm]
X; 0.314±0.0015 Y; 0.318±0.0015
Color temperature: 6300°K±1000°K
dUV: -3dUV
(5) Move the the Ez-Adjust screen by pressing the
and exit the adjustment mode by pressing the ADJ KEY.
- 14 -
(Automatic Adjustment)
CENTER
(DEFAULT)(Hex)
Min
Warm Cool
Jd 00 C0
Je 00 C0
Jf 00 C0
lj Lm 00 3F
lk Lm 00 3F
ll Lo 00 41
00 00", complete "wb 00 ff".
Max
(Hex)
Mid Warm
C0 C0 ff
C0 C0 ff
C0 C0 ff
41 40 7f
40 40 7f
42 41 7f
KEY
V