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- 13 -

- 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

· Press the PIP key of th ADJ remote control.(This PIP key is

hot key to enter the VCOM adjuting mode)

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

G

” key at “10. V-

Com”

· As pushing the right or the left key 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.)

· Push the “OK” key to store value. Then the message “Saing

OK” is pop.

· Press the exit key to finish VCOM adjustment.

(Visual Adjust and control the Voltage level)

- When pressing IN-STOP key by SVC remocon, Red LED are

blinked alternatively. And then Automatically turn off.

(Must not AC power OFF during blinking)

Confirm whether is normal or not when between power
board’s ac block and GND is impacted on 1.5 kV(dc) or 2.2
kV(dc) for one second.

• Press “Power on” key of service remocon.

(Baud rate : 115200 bps)

• Connect RS232 Signal Cable to RS-232 Jack.
• Write Serial number by use RS-232.
• Must check the serial number at the Diagnostics of SET UP

menu. (Refer to below).

CMD : A0h
LENGTH : 85~94h (1~16 bytes)
ADH : EEPROM Sub Address high (00~1F)
ADL : EEPROM Sub Address low (00~FF)
Data : Write data
CS : CMD + LENGTH + ADH + ADL + Data_1 +…+ Data_n
Delay : 20ms

* Description

FOS Default write : <7mode data> write
Vtotal, V_Frequency, Sync_Polarity, Htotal, Hstart, Vstart, 0,
Phase
Data write : Model Name and Serial Number write in

EEPROM,.

A. Serial number D/L is using of scan equipment.
B. Setting of scan equipment operated by Manufacturing

Technology Group.

C. Serial number D/L must be conformed when it is produced

in production line, because serial number D/L is mandatory
by D-book 4.0.

No. Adjust 

mode 

CMD(hex)

LENGTH(hex) 

Description 

1 

EEPROM WRITE 

A0h 

84h+n 

n-bytes Write (n = 1~16) 

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

* Manual Download (Model Name and Serial Number)

If the TV set is downloaded by OTA or Service man, Sometimes
model name or serial number is initialized.(Not always)
There is impossible to download by bar code scan, so It need
Manual download.
1) Press the ‘instart’ key of ADJ remote controller.
2) Go to the menu ‘5.Model Number D/L’ like below photo.
3) Input the Factory model name(ex 42LD450-ZA) or Serial

number like photo.

4) Check the model name Instart menu -> Factory name

displayed (ex 42LD450-ZA)

5) Check the Diagnostics (DTV country only) -> Buyer model

displayed (ex 42LD450)

- 14 -

- 15 -

- 16 -

GMA(1~8)

P701, P702 

MINI LVDS

IC601

MAX9668ETP

IC101

SATURN7M

IC603

MAX17113

IC600

TPS62110

PANEL_VCC

12V

PANEL_VCC

12V

GVST

GCLK[1:6]

GVDD_EVEN/ODD

VGH 27V

VGL -5V

VDD_LCM

16V

HVDD 8V

VST

CLK[1:6]

VDD_EVEN/ODD

AMP_SDA / SCL

VCOM

VCOM_FB

POL

SOE

IC602

TPS65192

VCC_LCM

3.3V

P-GAMMA Block

LEVEL Shift Block

Mini LVDS Data L(6 bit)

POWER Block

IC301

H5TQ1G63BFR

DDR3 SDRAM 

VGH  27V

VGL -5V

VDD_LCM 16V

VCC_LCM 3.3V

VDD_LCM 16V

VCC_LCM 3.3V

HI

GH=VGH

Low

=

VGL

Mini LVDS Data R(6 bit)

C-MA[0:12], C-MDQL[0:7], C-MDQU[0:7]

VDD_LCM

16V

VCC_LCM

3.3V

GIP Model

VGL -5V