50PG6900-ZF (CHASSIS:PD84A) - LG TV Service Manual (repair manual). Page 12

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(5) EEPROM DATA READ

1) Signal TABLE

2) Command Set

To read the appointment Address of E2PROM by 128(80h)
-byte

(6) EEPROM Data Write(serial number D/L)

1) Signal TABLE

CMD

: 8Eh 

LENGTH : 84h+Byte
ADH

: E2PROM Slave Address (A0, A2, A4, A6, A8), 

Not 00h (Reserved by Buffer To EEPROM)

ADL

: E2PROM Sub Address (00~FF)

Data

: Write data

CS

: CMD + LENGTH + ADH + ADL + Data_1 + ... + 

Data_n

2) Command Set

* 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,.

Delay : 20ms

3) Command Set

* 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,.