LG 29UM68, Service Manual

Page: 23 / 37

- 2
3
-
Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
6. Signal composition for adjustment
6.1 I2C (100K BPS)
6.2 COMMUNICATION START
START 6E A STOP 50Ms
#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 VAL A CS A STOP
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. Adjustment contents CMD
(hex)
ADR VAL(hex) Explanation
1 EEPROM ALL INITIAL E4 00 00 adjustment Initialization
2 EEPROM READ E7 Slave
add
At EEPROM Read
3 EEPROM WRITE E8 Slave
add
Data Write data at EEPROM
4 R GAIN 16 00 00-64
Tune Gain 5 G GAIN 18 00 00-64
6 B GAIN 1A 00 00-64
7 BRIGHT(Backlight) 10 00 00-64 Tune Analog Bright
8 FACTORY RESET F0 00 00 Factory reset
9
COLOR_MODE_
CHANGE
F2 00
01 WARM(6500K)
02 COOL(9300K)
10 Elapsed time Clear E9 00 00
Aging off &Clear
elapsed time
11 Aging On/Off F3 00 FF/00 FF:ON / 00:OFF
12 Input Select F4 00
0x80
0xD0
0x90
0x91
1:DVI DIGITAL
2:DisplayPort
3:HDMI1
4:HDMI2
13 SYSTEM RESET F5 00 00 Restart System
14 Select Language 68 00
0x00 ~
0x0F
00:English,
01: German
02: French
03: Spanish