DOWNLOAD LG 55LEX8-ZA (CHASSIS:LD03S) Service Manual ↓ Size: 6.7 MB | Pages: 57 in PDF or view online for FREE

- 13 -

A

Standard color coordinate and temperature using CA-
210(CH 9)

Step 1) Turn on TV.
Step 2) At the Local Dimming mode, module Edge Backlight

moving right to left Back light of IOP module moving.

Step 3) Confirm the Local Dimming mode.
Step 4) Press “exit” key

- Why need Vcom adjustment?

A

The Vcom (Common Voltage) is a Reference Voltage of
Liquid Crystal Driving.
-> Liquid Crystal need for Polarity Change with every frame.

- Adjust sequence

A

Press the PIP key of the ADJ remote control. (This PIP
key is hot key to enter the VCOM adjusting mode)

(Or After enter Service Mode by pushing “ADJ” key, then
Enter V-Com Adjust mode by pushing “

G

” key at “10.V-Com”)

A

As pushing the right or the left button on the remote
control, And find the V-COM value Which is no or
minimized the Flicker.

(If there is no flicker at default value, Press the exit key
and finish the VCOM adjustment.)

A

Push the OK key to store value. Then the message
“Saving OK” is pop.

A

Press the exit key to finish VCOM adjustment.

- Equipment : RF Remote control for test, IR-KEY-Code

Remote control for test

- You must confirm the battery power of RF-Remote control

before test(recommend that change the battery per every lot) 

- Sequence (test)

1) if you select the ‘start key(Mute)’ on the controller, you

can pairing with the TV SET.

2) You can check the cursor on the TV Screen, when select

the ‘OK’ Key on the controller 

3) You must remove the pairing with the TV Set by select

‘Vol+(STOP) Key’ on the controller

(Pattern Generator MSHG-600, MSPG-6100 [Support HDMI 1.4])
* HDMI mode No. 872, pattern No. 83)
1) Please input 3D test pattern like below

2) When 3D OSD appear automatically, then select OK button.

3) Don’t wear a 3D Glasses, Check the picture like below.

Mode

Color Coordination

Temp

∆UV

x

y

COOL

0.269 ± 0.002

0.273 ± 0.002 13000 K

0.0000

MEDIUM

0.285 ± 0.002

0.293 ± 0.002

9300 K

0.0000

WARM

0.313 ± 0.002

0.329 ± 0.002

6500 K

0.0000

Local Dimming Demo (Edge LED Model)

Local Dimming Demo (IOP & ALEF Model)

Row  Li ne

Column  Line

C

LC

C

ST

S

Y

S

T

E

M

Gat

e

 Driv

e

 IC

So urce D r i v e  I C

Ti m i n g  
Co nt r o ll e r

Po w e r  
Blo ck

V

COM

Ga mma
Re f e r e nce V o ltage

Gamm a Reference
Volta ge

Data (R ,G,B ) & C ont ro l s ignal

Con t rol si gnal

Data (R ,G,B ) &
Con t rol si gnal

In
te

rf

a

c

e

TFT

Po w e r  I n p u t

Power Input

Da t a  I n p u t

Da t a  I n p u t

V

COM

Liquid 
Crys tal

V

COM

[Visual Adjust and control the Voltage level]

- 14 -

(1) Start 3D pattern inspection
(2) If IR emitter emitter signal is correctly received to IR

receiver, the lamp of IR tester turn on

(1) Overview

- Option selection is only done for models in Non-EU.
- Applied model: LD03S Chassis applied EU model.

(2) Method

1) Press ADJ key on the Adj. Remote Control, then select

Country Group Menu.

2) Depending on destination, select Country Group Code

04 or Country Group EU then on the lower Country
option, select US, CA, MX. Selection is done using +, -
or 

GF

KEY.

- Method : Press Adj. key on the Adj. Remote Control, 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.

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

• TEST time: 1 second
• TEST POINT

- GND TEST = POWER CORD GND & SIGNAL CABLE

METAL GND

NEUTRAL

• LEAKAGE CURRENT: At 0.5 mArms

Measurement condition:
1. RF input: Mono, 1 KHz sine wave signal, 100 % Modulation
2. CVBS, Component: 1 KHz sine wave signal 0.4 Vrms
3. RGB PC: 1 KHz sine wave signal 0.7 Vrms

<IR Tester Lamp turned off(NG)>

<IR Emitter inspection>

<IR Tester Lamp turned on(OK)>

No.

Item

Min. Typ. Max. Unit

1.  Audio practical max

7

W

EQ Off

Output, L/R

AVL Off

(Distortion=10 %

Vrms Clear Voice Off

max Output)

2. Speaker 

(8 

Ω

10.0 15.0

W

EQ On

Impedance)

AVL On

Clear Voice On

- 15 -

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 starting.

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 control.
2) Select "Tool Option 1" and Push “OK” button.
3) Push in the number. (Each model has their number.)

- 16 -