LG LM-X120HM, Service Manual

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2019/4/8
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* * * * * * * * * * * * * *
* *
The linear detection range is 0~-39dBm,
coupling factor is 22~27dB.
No Connection, for PN test
[12] [12] [12] [12] [12] [12] [12] [12] [12] [12] [12] [12] [12] [12] [12] [12]
[12]
[12]
[12]
[12]
Put LC filter (default L=0R, C=NC) close to PMIC output
due to harmonic rejection.
For phone, remove 0R to avoid low slew rate.
For EVB, put test point.
6dB Attenuator
[12,22]
[22]
[33]
Power domain of MT6177M
4.7uF close to RFIC for better Ripple Performance
C1305
0.1uF
C1304
0.1uF
C1303
0.1uF
C1302
0.1uF
C1301
0.1uF
1 2
R1315
2K
C1306
0.1uF
C1307
4.7uF
C1308
4.7uF
1 2
R1316
0
1 2R1318
0
1
2R1317
0
XO
DRX
TXO
PRX
BSI
PRX(I/Q) TX(I/Q)
MT6177M
DRX(I/Q) DET(I/Q)
J3
RX2_BBIP
G4
EN_BB
G1
RCAL
L2
XO_IN
L1
VIO
J4
RX2_BBIN
L4
RX2_BBQP
K4
RX2_BBQN
B7 PRX3
H1
BSI_EN
K1
BSI_CLK
H2
BSI_D0
J1
BSI_D1
J2
BSI_D2
L5
RX1_BBIP
K5
RX1_BBIN
J6
RX1_BBQP
J5
RX1_BBQN
H12
TX_BBIP
J12
TX_BBIN
L12
TX_BBQP
K12
TX_BBQN
K2
GND
L9
DET_IP
K9
DET_IN
K7
DET_QP
K8
DET_QN
A7 PRX4
B6 PRX5
A5 PRX6
B5 PRX7
B4 SWHB
B3 SWLB
A2 DRX1
A1 DRX2
B2 DRX3
B1 DRX4
C2 DRX5
D1 DRX6
D2 DRX7
E1 DRX8
D12 TXO1
C12 TXO2
A12 TXO3(2G)
A10 TXO4(2G)
C11 TXO5
A4 PRX8
B10
TX_GND
C10
TX_GND
D10
TX_GND
D11
TX_GND
F10
STX_MON
L7
TXDET1
G2
VDD_RXHF
E3
VDD_RXLV
J10
VDD_STXHF
L11
VDD_STXLV
F12
VDD_TXHF
C3
GND
D3
GND
F3
GND
G3
GND
H3
GND
C4
GND
D4
GND
E4
GND
F4
GND
H4
GND
C5
GND
E5
GND
F5
GND
G5
GND
H5
GND
C6
GND
D5
GND
D6
GND
E6
GND
F6
GND
G6
GND
H6
GND
C7
GND
D7
GND
E7
GND
F7
GND
G7
GND
H7
GND
J7
GND
C8
GND
D8
GND
E8
GND
F8
GND
G8
GND
H8
GND
J8
GND
B9
GND
C9
GND
D9
GND
E9
GND
F9
GND
G9
GND
H9
GND
J9
GND
E10
GND
G10
GND
H10
GND
K10
GND
L10
GND
E11
GND
F11
GND
G11
GND
H11
GND
J11
GND
K11
GND
E12
GND
G12
GND
A8 PRX2
B8 PRX1
E2 DRX9
F2 DRX10
B12
TX_GND
U1301
RF-TR-MT6177
1
2
R1331
300
R1330
15
1
2
R1314
300
GND
GND
GND
RF_LTE_HB_TX_RFIC [14]
RF_LTE_MB_TX_RFIC
[14]
RF_2G_HB_TX_RFIC
[15]
RF_2G_LB_TX_RFIC [15]
RF_LTE_LB_TX_RFIC
[14]
LTE_DRX_BB0_IP
[3]
LTE_DRX_BB0_IN
[3]
LTE_DRX_BB0_QP
[3]
LTE_DRX_BB0_QN
[3]
LTE_PRX_BB0_IP
[3]
LTE_PRX_BB0_IN
[3]
LTE_PRX_BB0_QP
[3]
LTE_PRX_BB0_QN
[3]
LTE_TX_BB0_IP
[3]
LTE_TX_BB0_IN
[3]
LTE_TX_BB0_QP
[3]
LTE_TX_BB0_QN
[3]
LTE_DET_BB0_IP
[3]
LTE_DET_BB0_IN
[3]
LTE_DET_BB0_QP
[3]
LTE_DET_BB0_QN
[3]
RFIC0_BSI_D1 [3]
RFIC0_BSI_D0 [3]
RFIC0_BSI_CK [3]
RFIC0_BSI_EN [3]
RF_2G_HB_TX_RFIC
RFIC0_BSI_EN
RFIC0_BSI_D0
RFIC0_BSI_CK
RF_LTE_MB_TX_RFIC
RF_LTE_HB_TX_RFIC
RFIC0_BSI_D1
RF_2G_LB_TX_RFIC
LTE_PRX_BB0_QP LTE_PRX_BB0_IN LTE_PRX_BB0_IP LTE_DET_BB0_QP LTE_DET_BB0_IN LTE_DET_BB0_IP LTE_TX_BB0_QN LTE_TX_BB0_QP LTE_TX_BB0_IN LTE_DRX_BB0_IP LTE_DET_BB0_QN LTE_DRX_BB0_QN LTE_DRX_BB0_QP LTE_DRX_BB0_IN LTE_TX_BB0_IP LTE_PRX_BB0_QN
GND
VRF18_RFIC
VRF18_RFIC
GND
VRF12_RFIC
GND
VRF18_RFIC
GND
VRF12_RFIC
GND
VRF18_RFIC
VRF12_RFIC
VRF18_RFIC
VRF18_RFIC
VRF12_RFIC
VIO18_RFIC
GND
GND
SRCLKENA1 [3,8]
PMIC_CLK_RF [8]
GND
GND
RF_TXDET[15]
N58683668
VIO18_RFIC
VIO18_PMU VIO18_RFIC
VRF18_RFIC VRF18_PMU
VRF12_RFIC VRF12_PMU
GND
GND
RF_LTE_LB_TX_RFIC
RF_B38_DRX_RFIC [16]
RF_B1_DRX_RFIC
[16]
RF_B3_DRX_RFIC
[16]
RF_B7_DRX_RFIC [16]
RF_B40_DRX_RFIC [16]
RF_B5_DRX_RFIC [16]
RF_B28_DRX_RFIC [16]
RF_B20_DRX_RFIC [16]
RF_B8_DRX_RFIC
[16]
RF_B40/B41_PRX_RFIC
[14]
RF_B2_PRX_RFIC [15]
RF_B20/17_PRX_RFIC
[15]
RF_B1_PRX_RFIC
[15]
RF_B4/66_PRX_RFIC
[15]
RF_B28_PRX_RFIC
[15]
RF_B8_PRX_RFIC [15]
RF_B5_PRX_RFIC [15]
RF_B7_PRX_RFIC
[15]
RF_B3_PRX_RFIC
[15]
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