LG M4224C Service Manual

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Copyright LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
C
2008
(4) DDC Command set
7.4 DDC command protocol
7.4.1 Signal Table
7.4.2 E
2
PROM Data Write
7.4.2.1 Signal Table
LEN : 84h + Byte
CMD : 8Eh
ADH : E
2
PROM Slave Address (A0, A2, A4, A8),
Not 00h (Reserved by Buffer to E
2
PROM )
ADL : E
2
PROM Sub Address ( 00~ FF)
Data : Write data
7.4.2.2 Command Set
- use
• EDID write : 16-byte by 16-byte, 8 order (128-byte)
write(TO “00 – 7F” of “EEPROM Page A4”)
• FOS Default write : 16-mode data
(HFh,HFl,VF,STD,HP,VP,Clk,ClkPh,PhFine) write
• Random Data write : write the appointment Address of
E2PROM
7.4.3 E
2
PROM Data Read
7.4.3.1 Signal Table
7.4.3.2 Command Set
- use: Read the appointment of E2PROM by 128(80h)-byte.
Delay 150ms
----------------------------------------------------------------------
128 Bytes
STOP
A A D1 6F
STOP
START
A
A
A
Dn
A A A 50 6E 03 CMD ADH84 START A A ADL A CS
No. contents CMD ADH ADL Details
1 EEPROM READ E7 A0 0 0-Page 0~7F Read
2 80 0-Page 80~FF Read
3 A2 0 1-Page 0~7F Read
4 80 1-Page 80~FF Read
5 A4 0 2-Page 0~7F Read
6 80 2-Page 80~FF Read
7 A6 0 3-Page 0~7F Read
8 80 3-Page 80~FF Read
Adjustment
STOP
AAA AA 50 6E 03 CMD ADH84+n START ADL
A
CS
A
AData_1 A . . . Data_n A
No. Adjustment contents CMD(hex) LEN Details
1 EEPROM WRITE E8 94 16-Byte Write
2 84+n n-byte Write
STOP
AAAA A 506E 03 CMD ADR84 START A A VAL A CS
No.
Adjustment
content
CMD
(HEX)
ADR
VALUE detail
1
Aging On/Off F3
00 FF/00 FF : ON / OO : OFF
2
Input select F4
00
0x 10 : TV
0x 20 : AV1
0x 21 : AV2
0x 40 : Component1
0x 41 : Component2
0x 60 : RGB
0x 90 : HDMI1
0x 91 : HDMI2
3
R GAIN 16
00 - C0
4
G GAIN 18
00 - C0
5
B GAIN 1A
00
00 - C0
Gain Adjustment
Color temp.:COOL
6
R GAIN 16
00 - C0
G GAIN 18
00 - C0
B GAIN 1A
01
00 - C0
Gain Adjustment
Color temp.:Medium
R GAIN 16
00 - C0
G GAIN 18
00 - C0
B GAIN 1A
02
00 - C0
Gain Adjustment
Color temp.:Warm
00
01
CSM mode F2
00
02
AUTO ADC F1
00 0, 1, 2
0: Offset Adjustment
1: Gain Adjustment
2: Offset and Gain Adjustment
EEPROM Read E7
00 00 EEPROM read
EEPROM Write E8
00 data EEPROM write
COOL
Medium
Warm
77
8
9
10
11
12
13
14
15

LG M4224C Specifications

General

Brand	LG
Model	M4224C
Category	Monitor
Language	English