19LH250C (CHASSIS:LD91Z) - LG TV Service Manual (repair manual). Page 12

* Check display and sound

- Check Input and Signal items. (cf. work instructions)

1) TV
2) AV (SCART1/SCART2/ CVBS)
3) COMPONENT (480i)
4) RGB (PC : 1024 x 768 @ 60hz)
5) HDMI
6) PC Audio In
* Display and Sound check is executed by Remote control.

<Caution> Not to push the INSTOP KEY after completion if

the function inspection

· W/B Equipment condition

CA210 : CH 9, Test signal : Inner pattern (85IRE)

· Above 5 minutes H/run in the inner pattern. (“power on” key

of adjust remote control)

* Connecting picture of the measuring instrument

(On Automatic control)
Inside PATTERN is used when W/B is controlled. Connect to
auto controller or push Adjustment R/C POWER ON ->
Enter the mode of White-Balance, the pattern will come out.

* 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 (CA210) 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 5minutes.

- Using ‘no signal’ or ‘full white pattern’ or the others,

check the back light on.

• Auto adjustment Map(RS-232C)

RS-232C COMMAND
[CMD

ID DATA]

Wb

00

00

White Balance Start

Wb

00

ff

White Balance End

** Caution **

Color Temperature : COOL, Medium, Warm. 
One of R Gain/G Gain/ B Gain should be kept on 0xC0, and
adjust other two lower than C0. (when R/G/B Gain are all
C0, it is the FULL Dynamic Range of Module)

* Manual W/B process using adjusts Remote control.

• After enter Service Mode by pushing “ADJ” key,
• Enter White Balance by pushing “

G

” key at “6. White

Balance”.

* After done all adjustments, Press “In-start” key and

compare Tool option and Area option value with its BOM, if
it is correctly same then unplug the AC cable. If it is not
same, then correct it same with BOM and unplug AC cable.
For correct it to the model’s module from factory JIG model.

* Push the “IN STOP”key after completing the function

inspection. And Mechanical power switch must be set “ON”.

• Connect D-sub Signal Cable to D-sub Jack.
• Write EDID Data to EEPROM(24C02) by using DDC2B

protocol.

• Check whether written EDID data is correct or not.
* For SVC main Ass’y, EDID have to be downloaded to Insert

Process in advance.

• Connect HDMI Signal Cable to HDMI Jack.
• Write EDID Data to EEPROM(24C02) by using DDC2B

protocol.

• Check whether written EDID data is correct or not.
* For SVC main Ass’y, EDID have to be downloaded to Insert

Process in advance.

- 12 -

Cool 9,300k

ºK

X=0.285(±0.002)

Y=0.293(±0.002)

<Test Signal>

Medium 8,000k

ºK

X=0.295(±0.002)

Inner pattern

Y=0.305(±0.002)

(216gray,85IRE)

Warm

6,500k

ºK

X=0.313(±0.002)

Y=0.329(±0.002)

 

Full White Pattern

COLOR
ANALYZER
TYPE: CA-210

RS-232C Communication

CA-210

RS-232C COMMAND MIN

CENTER

MAX

[CMD ID DATA]

(DEFAULT)

Cool

Mid

Warm

Cool

Mid

Warm

R Gain

jg

Ja 

jd

00

172

192

192

192

G Gain

jh

Jb

je

00

172

192

192

192

B Gain

ji

Jc

jf

00

192

192

172

192

R Cut

64 

64 

64 

128

G Cut

64 

64 

64 

128

B Cut

64 

64 

64 

128