LG Flatron 27UD68P Service Manual page 27

6. Signal composition for adjustment
6.1 I2C (100K BPS)
6.2 COMMUNICATION START
#Until ACK BIT goes LOW, Repeat it.
6.3 Command form.
Command form use DDC2AB standard communication protocol.
START 6E A 50 A LEN A 03 A CMD A 00
a. LEN : DATA BYTE number to send.
b. CMD : Command language that monitor executes.
c. VAL : FOS DATA
d. CS : Dada's CHECHSUM that transmit
e. DELAY : 50MS
f. A : Acknowledge
6.4 Screen adjust command (LENGTH = 84)
No.
1 EEPROM ALL INITIAL
2
3
4
5
6
7
8
9
AUTO_COLOR_ADJUST
COLOR_MODE_CHANG
10
11
12
13
14
15
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Only for training and service purposes
START 6E
Adjustment contents
EEPROM READ
EEPROM WRITE
R GAIN
G GAIN
B GAIN
BRIGHT(Backlight)
FACTORY RESET
E
Elapsed time Clear
Aging On/Off
Input Select
SYSTEM RESET
Select Language
A STOP
CMD(hex ADR VAL(hex)
)
E4 00
E7 Slave
add
E8 Slave Data
add
16 00 00-64
18 00 00-64
1A 00 00-64
10 00 00-64
F0 00
F1 00
F2 00
E9 00
F3 00 FF/00
0xD0
F4 00 0x90
0x91
F5 00
0x00 ~
68 00
0x0F
- 27 -
50Ms
A VAL A CS A STOP
Explanation
00 adjustment Initialization
At EEPROM Read
Write data at EEPROM
Tune Gain
Tune Analog Bright
00 Factory reset
AUTO COLOR Tuning
0
0:Auto color
01 6500K
02 9300K
Aging off &Clear
00
elapsed time
FF:ON / 00:OFF
1:DisplayPort
2:HDMI1
3:HDMI2
00 Restart System
00:English,
01: German
02: French
LGE Internal Use Only