Circuit Diagram - LG FM300 Service Manual

7. CIRCUIT DIAGRAM

16 15
L
K
J
CN100 KJA-DC-0-0037
5
C106
I
4 DNI
3
ENJW0002601
H
RESET SWITCH
G
R125 DNI
R126 DNI
VA101
R127 DNI
R128 0
R129 DNI
ESCY0008901
SKHHAPA010
F
E
SWREG_PDRIVE
D
R141
SWREG_NDRIVE
C
SWREG_VFB_SEN
B
VCNTL
VSENSE2P5
A
16 15
LGE Internal Use Only
14 13 12 11
FOR N.P POWER [3.3V/2.16A]
C18
100n
Q1
SI7121DN
EBK61571901
D1
B340A
EAH61438301
EDSY0020101
1
C107 PSD24C-LF C108 C109
0.1u ZD100 10n DNI
2
R101
C17
DNI 0.1u
NP_EN
LTE_EN
VDD_3.3
EXT_POR/
PERST/
GND
C14
10u
VDD_3.3
C133 C134
10u 0.1u
S1 S2 S3
LTE_PWR_EN
R140 G
1 Q102
SI7403BDN
EBK61473001
D1 D2 D3 D4 D5 D6 D7
L102 3.3u
VDD_1.2
NR5040T3R3N
EAP61746101
C135 C156 C136 C111
22u 22u 22u 1u
D1 D2 D3 D4 D5
Q103
SIA426DJ
EBK61591901
G
1
S1 S2
R144 0
VDD_3.3
C139
0.1u
R152 0
2SB1424
EQBP0008701
VDD_2.5
R154 0
C149 C150
0.1u 10u
14 13 12 11
10 9 8 7
R14 100K
R102 100K
R8 2.7K
R11 100K
30 L100
VIN5
21
LX3
1 20 2.2u
FB LX2
2 19
V5V PGND6 C101 C102
3 U2 18 C9
AGND1 PGND5 22u 22u
SC424 10n
C3 4 17 C1
VOUT EUSY0369702 PGND4
5 16 DNI
1u VIN PGND3
6 15
VLDO LX1
7
BST C12
31
LX4 47p
C8
2.2u
C4 1u
C15
10u
NP_EN
C115
DNI
VA100
SPPH410100
ESPY0001701
FOR LTE MODULE POWER [3.75V/2.16A]
R13 DNI
R103 100K
R7 2.7K
R12 100K
30 L101
VIN5
21
LX3
1 20 2.2u
FB LX2
2 19
V5V U1 PGND6
C10 C119
3 18
AGND1 PGND5
SC424 10n 22u
4 17 C2
C19 C6
VOUT PGND4
5 EUSY0369702 16 DNI
100n 1u
VIN PGND3
6 15
VLDO LX1
7 C11
BST
31 47p
C7 LX4
2.2u
C5 1u
C13
10u
LTE_EN
C126
DNI
KRX102U
EQBA0000601
+2.6V_LEVEL_TRANSLATOR
VDD_2.6_LT
VDD_3.3
RP104K261D
U103
4 1
VDD VOUT
3 2
LT_EN
CE_NC GND
DNI R153
C146 C148
EUSY0353701
1u
1u
10 9 8 7
- 74 -
6 5 4 3 2
VDD_3.3
Power LED(White)
67-21-L9C-W4556W1X1B2-2T
C104
LD100
R104
22u
C103 10
0.1u EDLM0009901
C110
DNI
3
R114 2 Q100
PWR_LED
1K UMT2222A
1
EQBN0005301
C116
DNI
VDD_3.75
C120 C105
22u 22u
C121
0.1u
TRANSFORMER
VDD_2.5
R133 0 1 14
PORT1_TDP TD+ TX-
FB100 220 2 15 R134 75
V_CTR1 CM2
R135 0 3 16
PORT1_TDN TD- TX+
R137 0 6 11
PORT1_RDP RD+ RX+
7 10
U104
V_CTR2 CM1
8 9
PORT1_RDN R138 0
RD- RX-
4 13
NC1 NC4
5 12
NC2 NC3
ELCP0009412
TLA-6T118LF
C153 C152 C151 C154 C128 C129 C130 C131 C132
8.2p 8.2p 8.2p 8.2p 0.1u 10u 10u 0.1u 0.1u
RJ-45 CON
CN101
G1 G3
9
1
P1_RDP
2
P1_RDN
3
P1_TDP
C137 1n 4
R146 75
5
6
P1_TDN
C138 1n 7
R148 75
8
G2 G4
10
ENZY0030801
85507-5001
6 5 4 3 2
7. CIRCUIT DIAGRAM
1
L
K
J
I
H
G
F
E
P1_TDN
C127 1n
P1_TDP
P1_RDP D
P1_RDN
C
B
A
1
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