42LD320H (CHASSIS:LB0AW) - LG TV Service Manual (repair manual). Page 14

- Adjust sequence

· Press the PIP key of the Adjustment 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”)

· 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

“Saving OK” is pop.

· Press the exit key to finish VCOM adjustment.

(Visual Adjust and control the Voltage level)

- When pressing IN-STOP key by Service remote control, 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 remote control.

(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.

* 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 on the Adjustment remote control.
2) Go to the menu ‘5.Model Number D/L’ like below photo.
3) Input the Factory model name(ex 32LD322H-ZA) or Serial

number like photo.

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

displayed. (ex 32LD322H-ZA)

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

displayed. (ex 32LD322H)

- 14 -

No. Adjust 

mode 

CMD(hex)

LENGTH(hex) 

Description 

1 

EEPROM WRITE 

A0h 

84h+n 

n-bytes Write (n = 1~16)