Schematic Diagram - LG L1718S-BN - - 17" LCD Monitor Service Manual

1. DC to DC
U101
VCC5V
LD1117AL-3.3V
3
VIN VOUT
+
U102
LD1117AL-1.8V
3
VIN VOUT
VCC5V
Q101
S
R105 20K
PANEL_ENABLE
+
CN105
2x4PIN
8
7
6
5
4
3
2
1
1
1
2
2
3
3
4
4
5
5
4500-05
CN106
2. Input
CN103
DZ11AA1-HW6
11 1 R
6
12 2 G
7
13 3 B
8
14 4
9
15 5
10
VCC3.3
R
TVS101
BAV99 G
TVS102
BAV99 B
TVS103
BAV99 DETECT
TVS104
BAV99

SCHEMATIC DIAGRAM

VCC3.3
2
VCC3.3
+
VCC1.8
2
VCC1.8
+
VLCD
AP2305GN
VLCD
D
G
+
Q103
PMBT3904 Q107
2N7002K
FB107 BEAD60OHM
FB108 BEAD60OHM
FB109 BEAD60OHM
R124 100
R126/NC 100
R111/NC 0
R104/NC 0
FB101
SBK121Y
U103
AT24C02N-10SI
1 8
A0 VCC
2 7
A1 WP
3 6
A2 SCL
4 5
GND SDA
VCC3.3
3,4
ON/OFF R110 4K7
Q106
CCFL_ENABLE
PMBT3904
4
VCC3.3
1
LED_GREEN
4
Q102
PMBT3906
LED_AMBER_2 100
R101
VCC3.3
1
LED_AMBER
Q105
PMBT3906
LED_GREEN_2 R107 220
Key _AUTO
Key _DOWN
Key _MENU
Key _UP
Key _POWER
LED_AMBER_2
LED_GREEN_2
R113 56 1% C112 47n/25V
R114 100 C113 47n/25V
R116 56 1% C114 47n/25V
R117 100 C115 47n/25V
R119 56 1% C116 47n/25V
R120 100 C117 47n/25V
R121 470 C118 47n/25V
R122 4K7
DETECT
R125 100
R127 100
R129 100
R130 100
R131 100
R132 100
2
PC5V_VGA
3
1
VCC3.3
D103 BAV70
DDCA_SCL
DDCA_SDA
32
VCC5V
1
1
2
2
3
3
Brightness
4
4
5 ON/OFF
5
6
6
4500-06
CN101
VCC5V
R190
0
R188
Brightness
4K7/NC
Dimmer
C165/NC
Q104
PMBT3904/NC
1u/16V
RIN
GNDR
GIN
GNDG
BIN
PC5V_VGA
GNDB
SOG
VCC3.3
DET_VGA
DDCA_SCL_I
DDCA_SCL
VSY NC
HSY NC
DDCA_SDA_I
DDCA_SDA
4