DOWNLOAD LG 55LD650H (CHASSIS:LA05A) Service Manual ↓ Size: 12.3 MB | Pages: 65 in PDF or view online for FREE

- 13 -

(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.

2) Adjustment Map
Applied Model : LA02B Chassis ALL MODELS 

(5) 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 

(6) 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.

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

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

- 14 -

* 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.

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

temperature)

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

1000 (over 26 inch) 

• Standard color coordinate and temperature using CA-

210(CH 14) 

- HDCP setting is not necessary in This Chassis.  

For downloading the MAC address which be allotted on
each LAN Card. 

5.5.1 Adjustment Method  

1)  Connecting the TV set and the PC which has MAC

Address Writing program through  The RS232C cable.  

2)  Editing the macaddress.txt 
(Inserting start MAC address at top low. )
(Inserting start MAC address at bottom low. )

Launch MAC Address Writing program and set just like

below picture.(1) 

3) Click the LOAD button for reading the MAC address.(2) 

(SAVE : Saving the current MAC Address      

CLEAR : Initializing the space which insert MAC

Address. )

4) Click  the  “ MAC Address” button to write current MAC

Address.(3) 

5)  In case of being downloaded normally, you can see the

(4) message with “ OK” in the window.  

6) In case of being downloaded normally, MAC address

increased one by one  automatically. So the next set,
just click the “ MAC Address‚  ” button after  connecting
the port. 

(Whenever be finished, the program saves the MAC
Address in “ macaddress.txt” file automatically.) 

Mode

Color Coordination

Temp

∆

UV

x

y

COOL

0.276

0.283

11000K

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

0.276±0.002

0.283±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 -

* For confirm works normally the LAN card through PING

TEST.  

5.6.1 Adjustment Method (PCB Ass’ y Level)  
1) Connecting the LAN to Ass’ y and then turn on the Power. 
2) Press the ADJ Key in the adjustment remote controller.  
3) Press the “ 11. ACAP PING TEST” in EZ ADJUST menu to

check the Network works well.   

5.6.2 Adjustment Method (Ass’ y Line Level) 
1) Connecting the LAN port in SET to the PC which has the

PING Test program through a Cross LAN Cable. (PC LAN
IP setting : 12.12.2.3)  

2) Launch the PING Test program and confirm the program

Setting.  (Checking the TV’ s IP is set 12.12.2.2 in program.
Don’ t check the Modem.)  

3) Press the Power Only Key in the adjustment remote

controller.   (Setting the TV IP) 

4) Click  the  “ RUN” button of program, and then program

display “ OK” or “ NG” like  a below picture. 

* For clear the IP setting after the adjustment, press the
INSTOP button.  

America due to rating 

• Applied model: LA05A Chassis applied None USA

model(CANADA, MEXICO) 

5.7.2 Method   

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

Group Meun 

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

Menu 

32LD650H 17985 1576 35104

512

2 HDMI, CAN Tuner, 2 RCA 

37LD650H 22097 1576 35104

512

2 HDMI, CAN Tuner, 2 RCA 

42LD650H 26193 1576 35104

512

2 HDMI, CAN Tuner, 2 RCA 

- 16 -

Measurement condition: 
1. RF input : Mono, 1KHz sine wave signal, 100%

Modulation 

2. CVBS, Component : 1KHz sine wave signal 0.4Vrms 

3. RGB PC : 1KHz sine wave signal 0.7Vrms 

(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.)

No Item  Min 

Typ 

Max 

Unit 

1. Audio practical max

9.0 10.0 

12.0  W  EQ 

Off 

Output, L/R 

AVL Off 

(Distortion=10%  

8.5 

8.9 

9.8 

Vrms

Clear 

max Output) 

Voice Off

2. Speaker (8

Ω

TDB TDB  W  EQ 

On 

Impedance) AVL 

On

Clear 

Voice On 

Power Status 

Main B/D Shipping Condition 

AC Swithch condtion

Chassis Module Assembly ON N/A 

Front Module Assembly

N/A OFF 

Factory incoming 

ON 

OFF 

Final Assembly 

ON 

ON 

Ship-Out OFF 

ON