32LC4D (CHASSIS:LT73A) - LG TV Service Manual (repair manual). Page 11

* Before adjusting White-balance, the AV ADC should be done.

(1) Color Analyzer (CA-110)

When you adjust LCD color temperature, on Color analyzer
(CA-210), you should use Channel 9 which is Matrix
compensated (White, Red, Green, Blue revised) by CS-
1000 and adjust in accordance with White balance
adjustment coordinate which is specified on the next.

1) Color temperature standards according to CSM and Module.

2) White balance ajdustment coordinate and color temperature

3) PC (for communication through RS-232C) -> UART Baud

rate : 115200 bps

4) Luminance Y AV : upper 200 cd/m

2

) -> Applying to Cool

(2) Connecting picture of the measuring instrument(Automatic)

- Inside Pattern is used when W/B is controlled. Connect to

auto controller or push control R/C IN START -> Enter the
mode of White-Balance, the pattern will come out.

(3) Auto-control interface and directions

1) Adjust in the place where the influx of light like floodlight

around is blocked. (illumination is less than 10 lux).

2) Adhere closely the color analyzer(CA-210) to the module

less than 10cm distance, keep it with the surface of the
module and color analyzer’s prove vertically.(80-100°).

3) Aging time  

- After aging start, keep the power on (no suspension of

power supply) and heat-run over 15 minutes.

- In case of LCD, using ‘no signal’ or ‘full white pattern’

or the others, check the back light on.

One of R Gain / G Gain / B Gain should be kept on 80, and
others are controlled lowering from 80
1) Press ‘power on’ of the control R/C, set heat run to white by

pressing 

G

, and heat run over 15 minutes.

(Set: RS-233 Host: PC, Baud Rate: 115200bps, Download:
Cortez)

2) Zero Calibrate CA-210, and when controlling, stick the

sensor to the center of LCD module surface.

3) Double click In-start key on Controlling R/C and get in ‘white

balance’.

4) Set test-pattern on and display inside pattern. Control is

carried out on three color temperature, COOL, MEDIUM,
WARM. (Control is carried out three times,)

5) When the R/G/B GAIN is 80 on OSD, it is the FULL

DYNAMIC Range of the Module. In order to control white
balance without the saturation of FULL DYNAMIC Range
and DATA, one of R Gain / G Gain / B Gain should be kept
on 80, and other two is controlled lowering from 80.

* Color Temperature: Cool, Medium, Warm

- When R GAIN is set to 80

-> Control G GAIN and B GAIN by lowering from 80. 

- When B GAIN is set to 80

-> Control R GAIN and G GAIN by lowering from 80.

- When G GAIN is set to 80

-> Control R GAIN and B GAIN by lowering from 80.

One of R Gain / G Gain / B Gain should be kept on 80, and
adjust other two lower than 80.
(When R/G/B GAIN are all 80, it is the FULL DYNAMIC
Range of Module) 

- 11 -

CSM

Color Temp.

Cool

11,000K

Medium

9,300K

Warm

6,500K

CS-1000

CA-210(CH 9)

Cool

x

0.276

0.276±0.002

y

0.283

0.283±0.002

Δμv

0.000

0.000

CS-1000

CA-210(CH 9)

Medium

x

0.285

0.285±0.002

y

0.293

0.293±0.002

Δμv

0.000

0.000

CS-1000

CA-210(CH 9)

Warm

x

0.313

0.313±0.002

y

0.329

0.329±0.002

Δμv

0.003

0.003

Type

LT73A

Baud Rate

Data bit

Stop bit

Parity

115200

8

1

None

Protocol

Index

Cmd 1

Cmd 2

Min Value

Max Value

Setting

R-Gain_Normal

j

a

00(00)

128(80)

G-Gain_Normal

j

b

00(00)

128(80)

B-Gain_Normal

j

c

00(00)

128(80)

R-Gain_Warm

d

00(00)

128(80)

G-Gain_Warm

j

e

00(00)

128(80)

B-Gain_Warm

j

f

00(00)

128(80)

R-Gain_Cool

g

00(00)

128(80)

G-Gain_Cool

j

h

00(00)

128(80)

B-Gain_Cool

j

i

00(00)

128(80)

R-Offset_Normal

l

j

00(00)

128(80)

G-Offset_Normal

l

k

00(00)

128(80)

B-Offset_Normal

l

l

00(00)

128(80)

R-Offset_Warm

l

m

00(00)

128(80)

G-Offset_Warm

l

n

00(00)

128(80)

B-Offset_Warm

l

o

00(00)

128(80)

R-Offset_Cool

l

p

00(00)

128(80)

G-Offset_Cool

l

q

00(00)

128(80)

[Fig.2] Connection picture(On Automatic Control)