DOWNLOAD LG 42LD520 (CHASSIS:LA01B) Service Manual ↓ Size: 6.47 MB | Pages: 71 in PDF or view online for FREE

- 13 -

• HDMI II EDID Table

• Analog RGB EDID Table 

(1) Overview

• W/B adj. Objective & How-it-works

- Objective: To reduce each Panel’s W/B deviation
- How-it-works: When R/G/B gain in the OSD is at 192, it

means the panel is at its Full Dynamic
Range. In order to prevent saturation of
Full Dynamic range and data, one of
R/G/B is fixed at 192, and the other two is
lowered to find the desired value.   

- Adj. condition : normal temperature

1) Surrounding Temperature: 25±5ºC
2) Warm-up time: About 5 Min
3) Surrounding Humidity: 20% ~ 80%

(2) Equipment

1) Color Analyzer: CA-210 (NCG: CH 9 / WCG: CH12)
2) Adj. Computer(During auto adj., RS-232C protocol is

needed)

3) Adjust Remocon
4) Video Signal Generator MSPG-925F 720p/216-Gray

(Model:217, Pattern:78)

-> Only when internal pattern is not available

• Color Analyzer Matrix should be calibrated using CS-1000

(3) Equipment connection MAP

(4) Adj. Command (Protocol)

1) RS-232C Command used during auto-adj.

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.

Co lo r An alyzer

 

Co m p ut er

 

Pat t ern Gen erat o r

 

RS -232C 

RS -232C 

RS -232C 

Probe

Signal Source

* If TV internal pattern is used, not needed

Connection Diagram of Automatic Adjustment

RS-232C COMMAND

Meaning

[CMD

ID

DATA]

wb

00

00

Begin White Balance adj.

wb

00

ff

- 14 -

2) Adjustment Map
Applied Model : 32LD450-UA,  37LD450-UA,  42LD450-UA,

47LD450-UA 

(5) Adj. method

• 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)
4) Select mode in adj. Program and begin adj.
5) When adj. is complete (OK Sing), 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 

• Manual adj. 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 10cm of the
surface..

3) Press ADJ key -> EZ adjust using adj. R/C > 6. White-

Balance then press the cursor to the right (KEY

G

).

(When KEY(

G

) 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) Adj. is performed in COOL, MEDIUM, WARM 3 modes

of color temperature.

- If internal pattern is not available, use RF input. In EZ

Adj. menu 6.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.

* Adj. 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

- 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.

(6) Reference (White Balance Adj. coordinate and color

temperature)

• Luminance: 216 Gray
• Standard color coordinate and temperature using CS-

1000 

• Standard color coordinate and temperature using CA-210

ITEM

Command

Data Range

Default

(Hex.)

(Decimal)

Cmd 1

Cmd 2

Min

Max

Cool

R-Gain

j

g

00

C0

G-Gain

j

h

00

C0

B-Gain

j

i

00

C0

R-Cut

G-Cut

B-Cut

Medium

R-Gain

j

a

00

C0

G-Gain

j

b

00

C0

B-Gain

j

c

00

C0

R-Cut

G-Cut

B-Cut

Warm

R-Gain

j

d

00

C0

G-Gain

j

e

00

C0

B-Gain

j

f

00

C0

R-Cut

G-Cut

Mode

Color Coordination

Temp

∆

UV

x

y

COOL

0.269

0.273

13000K

0.0000

MEDIUM

0.285

0.293

9300K

0.0000

WARM

0.313

0.329

6500K

0.0000

Mode

Color Coordination

Temp

∆

UV

x

y

COOL

0.269±0.002

0.273±0.002

13000K

0.0000

MEDIUM

0.285±0.002

0.293±0.002

9300K

0.0000

WARM

0.313+0.002

0.329±0.002

6500K

0.0000

- 15 -

- HDCP setting is not necessary in Saturn5 model.

(1) Overview

- Option selection is only done for models in Non-USA

- Applied model: LA92A Chassis applied None USA

model(CANADA, MEXICO)

(2) Method

1) Press ADJ key on the Adj. R/C, then select Country

Group Menu

2) Depending on destination, select KR or US, then on the

lower Country option, select US, CA, MX. Selection is
done using +, - KEY

• Method: Press Adj. key on the Adj. R/C, then select Tool
option. 

• After final inspection, press In-Stop key of the Adj. R/C and

check that the unit goes to Stand-by mode.

• After final inspection, Always turn on the Mechanical S/W.

- Check that Power Cord is fully inserted to the SET.

(If loose, re-insert)

- Unit fully inserted Power cord, Antenna cable and A/V

arrive to the auto-check process. 

- Connect D-terminal to AV JACK TESTER
- Auto CONTROLLER(GWS103-4) ON
- Perform GND TEST
- If NG, Buzzer will sound to inform the operator.
- If OK, changeover to I/P check automatically.

(Remove CORD, A/V form AV JACK BOX)

- Perform I/P test
- If NG, Buzzer will sound to inform the operator.
- If OK, Good lamp will lit up and the stopper will allow the

pallet to move on to next process.

• TEST voltage

- GND: 1.5KV/min at 100mA
- SIGNAL: 3KV/min at 100mA

• TEST time: 1 second
• TEST POINT

- GND TEST = POWER CORD GND & SIGNAL CABLE

METAL GND

NEUTRAL

• LEAKAGE CURRENT: At 0.5mArms

Model

Tool 1 Tool 2 Tool 3 Tool 4 Tool5

Menu

32LD450(AUO) 16424 10770 52228

2317

33

2 

HDMI 

32LD450(Sharp) 2 

HDMI

32LD450(LGD)     

2HDMI

37LD450(AUO)

20520 10770 52228   2317

32

2 HDMI

37LD450(LGD)   

2HDMI

42LD450(LGD)

24608 10770 52228

2317

32  

2 HDMI

42LD450(CMO)

2 HDMI

42LD450(AUO)

2 HDMI

47LD450(LGD)

32800 10770 52228

2317

32

2 HDMI

- 16 -

(1) Put the USB Stick to the USB socket 
(2) Automatically detecting update file in USB Stick

- If your downloaded program version in USB Stick is Low,

it didn’t work.

But your downloaded version is High, USB data is
automatically detecting

(3) Show the message “Copying files from memory”

(4) Updating is staring.

(5) Updating Completed, The TV will restart automatically
(6) If your TV is turned on, check your updated version and

Tool option. (explain the Tool option, next stage)

* If downloading version is more high than your TV have,

TV can lost all channel data. In this case, you have to
channel recover. if all channel data is cleared, you didn’t
have a DTV/ATV test on production line.

* After downloading, have to adjust TOOL OPTION again.

1) Push "IN-START" key in service remote controller.
2) Select "Tool Option 1" and Push “OK” button.
3) Punch in the number. (Each model has their number.)