Read LG 42LV770S (CHASSIS:LD12D) Service Manual online
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3.7. CI+ Key checking method
Check whether the key was downloaded or not at ‘In Start’
menu. (Refer to below).
menu. (Refer to below).
=> Check the Download to CI+ key value in LGset.
3.7.1. Check the method of CI+ Key value
(1) Check the method on Instart menu.
(2) Check the method of RS232C Command.
(2) Check the method of RS232C Command.
1) Into the main assembly mode (RS232 : aa 00 00)
2) Check the key download for transmitted command.
(RS232 : ci 00 10)
3) Result value
- Normally status for download : OKx
- Abnormally status for download : NGx
- Abnormally status for download : NGx
3.7.2. Check the method of CI+ Key value (RS232)
1) Into the main assembly mode (RS232 : aa 00 00)
2) Check the method of CI+ key by command (RS232 : ci
00 20)
3) Result value
i 01 OK 1d1852d21c1ed5dcx
3.8. WIFI MAC ADDRESS CHECK
(1) Using RS232
(2) Check the menu on in-start
4. Manual Adjustment
4.1. ADC Adjustment
ADC adjustment is needed because of OTP(Auto ADC adjustment)
4.2. EDID(The Extended Display Identification
Data)/DDC(Display Data Channel) download
(1) Overview
It is a VESA regulation. A PC or a MNT will display an
optimal resolution through information sharing without any
necessity of user input. It is a realization of “Plug and Play”.
optimal resolution through information sharing without any
necessity of user input. It is a realization of “Plug and Play”.
(2) Equipment
- Since embedded EDID data is used, EDID download JIG,
HDMI cable and D-sub cable are not need.
- Adjust remote control
(3) Download method
1) Press ADJ key on the Adjustment remote control, then
select “12.EDID D/L”, By pressing Enter key, enter EDID
D/L menu.
D/L menu.
2) Select [Start] button by pressing Enter key, HDMI1/
HDMI2/ HDMI3/ HDMI4/ RGB are Writing and display
OK or NG.
OK or NG.
(4) EDID DATA
A
HDMI
A
RGB
CMD 1
CMD 2
Data 0
A
A
0
0
CMD 1
CMD 2
Data 0
C
I
1
0
CMD 1
CMD 2
Data 0
A
A
0
0
CMD 1
CMD 2
Data 0
C
I
2
0
CI+ key Value
H-freq(kHz)
V-freq.(Hz)
Transmission
[A][I][ ][Set ID][ ][20][Cr]
[O][K][X] or [NG]
0x00 0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x0A 0x0B 0x0C 0x0D 0x0E 0x0F
0x00
00
FF
FF
FF
FF
FF
FF
00
1E
6D
ⓐ
ⓑ
0x01
ⓒ
01
03
80
10
09
78
0A
EE
91
A3
54
4C
99
26
0x02
0F
50
54
A1
08
00
71
40
81
C0
81
0
81
80
95
0
0x03
90
40
A9
C0
B3
00
02
3A
80
18
71
38
2D
40
58
2C
0x04
45
00
A0
5A
00
00
00
1E
66
21
50
B0
51
00
1B
30
0x05
40
70
36
00
A0
5A
00
00
00
1E
00
00
00
FD
00
39
0x06
3F
1F
52
10
00
0A
20
20
20
20
20
20
ⓓ
0x07
ⓓ
01
ⓔ1
0x00
02
03
37
F1
4E
10
1F
84
13
05
14
03
02
12
20
21
0x01
22
15
01
26
15
07
50
09
57
07
ⓕ
0x02
ⓕ
0x03
ⓕ
E3
05
03
01
01
1D
80
18
71
1C
16
20
58
0x04 2C
25
00
A0
5A
00
00
00
9E
01
1D
00
80
51
D0
1A
0x05
20
6E
88
55
00
A0
5A
00
00
00
1A
02
3A
80
18
71
0x06
38
2D
40
58
2C
45
00
A0
5A
00
00
00
1E
00
00
00
0x07
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
ⓔ2
0x00 0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x0A 0x0B 0x0C 0x0D 0x0E 0x0F
0x00
0
FF
FF
FF
FF
FF
FF
0
1E
6D
ⓐ
ⓑ
0x01
ⓒ
01
03
68
10
09
78
0A
EE
91
A3
54
4C
99
26
0x02
0F
50
54
A1
08
00
71
40
81
C0
81
00
81
80
95
00
0x03
90
40
A9
C0
B3
00
02
3A
80
18
71
38
2D
40
58
2C
0x04
45
00
A0
5A
00
00
00
1E
66
21
50
B0
51
00
1B
30
0x05
40
70
36
00
A0
5A
00
00
00
1E
00
00
00
FD
00
3A
0x06 3E
1E
53
10
00
0A
20
20
20
20
20
20
ⓓ
0x07
ⓓ
0
ⓔ3
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