LG U8550 Service Manual page 237

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8. CIRCUIT DIAGRAM
1
2
A
CID0
CID1
CID2
CID3
B
CID4
CID5
CID6
CID7
IND_SINK
CIRES_N
SYSCLK1
I2C_DAT
I2C_CLK
CIVSYNC
CIHSYNC
CIPCLK
DCIN_3
KEYIN1
KEYIN2
KEYIN3
CPO_LTC_LCDBL
LEFT
C
CENTER
RIGHT
D
TP1
TP2
TP3
E
1
2
LGIC(42)-A-5505-10:01
3
4
LD2
R3
0
LEBB-S14H
LD1
R4
0
LEBB-S14H
CN2
51 52
1
50
2
49
3
48
4
47
5
46
6
45
7
44
8
43
9
42
10
41
11
40
12
39
13
38
14
37
15
36
16
35
17
34
18
33
19
32
20
31
21
30
22
29
23
28
24
27
25
26
53 54
R11
0
AXK8L50125BG
CN3
HEADER
1
20
R12
10
2
19
R10
0
3
18
C4
4
17
5
16
MAIN-to-LCD Connector
6
15
1u
7
14
C5
8
13
9
12
10
11
1u
AXK720145G
VGA Camera Connector
TP4
TP5
TP6
3
4
5
6
7
R6
0
EARP
C3
NA
R7
0
EARM
C1
C2
NA
NA
VDIG
CN1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
AXK8L40125G
Header
LCD Connector
Iss.
Notice No.
Date
Name
5
238
8
9
PDID7
PDID6
PDID5
PDID4
PDID3
PDID2
PDID1
PDID0
LCDWRX
LCDCSX_MAIN
LCDCSX_SUB
LCDRDX
LCDRESX
VGA_IO_OFF
LCDRS
MLED1
MLED2
MLED3
MLED4
MLED5
G1
40
39
38
37
36
35
34
33
32
31
VDIG
30
29
R9
28
OLD - NA
27
NEW - 0R
R1
26
0
25
24
100K
23
22
21
G2
Section
Date
Sign & Name
U8550(GD32)
MODEL
04/26
Designer
JS Lee
2005
Checked
DRAWING
NAME
Approved
DRAWING
LG Electronics Inc.
NO.
10
A
B
C
D
Sheet/
Sheets
1/1
U8550 LCD FPCB-1.0
enter draw_number
LG Electronics Inc.

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