3. TROUBLE SHOOTING
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Only for training and service purposes
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3.2 Checking Transceiver DC Power Supply Circuit Block
4. Trouble Shooting
4. 2. Checking Transceiver
DC Power Supply
Circuit Block
Test Point
TP3(1.8V)
TP1(1.225V)
TP2(2.05V)
U1500
Circuit Diagram
TP1(1.225V)
TP3(1.8V)
TP2(2.05V)
13
R1500
15
R1501
330
22n
L1507
8.2n
L1508
DN
I
C1510
100n
C1504
100n
C1505
C1506
100n
100n
C1507
C1508
100n
100n
C1511
C1512
100n
100p
C1517
+1V8_VREG_L10
+2V05_VREG_L9
1u
C1500
4.7u
C1501
100n
C1515
C1514
100n
C1516
100n
C1522
100n
C1518
100n
100n
C1519
100p
C1502
10u
C1524
4.75K
R1503
TOL=0.01
100n
C1520
C1521
100n
100n
C1523
DN
I
C1509
DN
I
C1513
+1V225_VREG_L1
DN
I
C1503
TX_BB_IP
TX_BB_IM
TX_BB_QP
TX_BB_QM
DAC REF
PRX_BB_IP
PRX_BB_IM
PRX_BB_QP
PRX_BB_QM
DRX_BB_IP
DRX_BB_IM
DRX_BB_QP
DRX_BB_QM
GNSS_BB_IP
GNSS_BB_IM
GNSS_BB_QP
GNSS_BB_QM
VDD_DIO
VDD_RF1_G_B
B
VDD_RF1_G_LNA
VDD_RF1_G_PLL VDD_RF1_G_VCO
VDD_RF1_P_PLL
VDD_RF1_P_VCO
VDD_RF1_S_PLL VDD_RF1_S_VCO
VDD_RF1_T_D
A
VDD_RF1_T_L
O
VDD_RF1_T_SYN
VDD_RF1_T_UPC
VDD_RF2_D_B
B
VDD_RF2_P_B
B
VDD_RF2_P_VCO VDD_RF2_S_VCO
VDD_RF2_T_B
B
VDD_RF2_T_D
A
VDD_RF2_T_PLL
VDD_RF2_T_VCO
VDD_RF2_X
O
TX_LB1_OUT
TX_LB2_OUT
TX_LB3_OUT
TX_LB4_OUT
TX_MB1_OUT
TX_MB2_OUT
TX_MB3_OUT
TX_MB4_OUT
TX_HB1_OUT
TX_HB2_OUT
PDET_RFFB
PRX_LB1_IN
PRX_LB2_IN
PRX_LB3_IN
PRX_LB4_IN
PRX_MB1_IN
PRX_MB2_IN
PRX_MB3_IN
PRX_HB1_IN
PRX_HB2_IN
PRX_HB3_IN
PRX_HMB4_IN
RTUNE
DNC
VDD_RF2_FBR
X
VDD_RF2_PRX
VDD_RF1_T_VCO
VDD_RF1_P_HB_LO
VDD_RF1_D_LB VDD_RF1_P_LB VDD_RF1_D_LO
M
VDD_RF1_D_LB_LO
VDD_RF1_D_M
B
VDD_RF1_D_HB
VDD_RF1_P_HMB_LO
VDD_RF1_P_HMB
59
52
68
93
74
163
154
146
138
139
155
130
151
160
60
53
67
152
79
90
78
48
85
123
137
121
161
117
135
115
136
54
98
102
80
62
162
153
147
157
126
114
127
99
71
37
18
17
116
100
149
129
92
73
65
51
25
108
107
31
72
38
14
11
22
57
34
97
76
86
103
9
27
43
61
U1500
19
5
R150
2
330
WTR0_PRX_MB3_IN
WTR0_PRX_LB3_IN
WTR0_PRX_LB2_IN
WTR0_PRX_MB1_IN
WTR0_PRX_HMB4_IN
WTR0_PRX_MB2_IN
WTR0_TX_MB2_OUT
WTR0_TX_MB3_OUT
WTR0_TX_LB1_OUT
WTR0_TX_MB4_OUT
WTR0_TX_LB2_OUT
WTR0_TX_LB3_OUT
WTR0_TX_HB1_OUT
WTR0_PRX_HB3_IN
WTR0_TXBB_Q_N
WTR0_TXBB_I_P
WTR0_TXBB_I_N
WTR0_TXBB_Q_P
WTR0_PRXBB_Q_P
WTR0_PRXBB_Q_N
WTR0_PRXBB_I_P
WTR0_PRXBB_I_N
WTR0_GNSSBB_Q_N
WTR0_GNSSBB_I_N
WTR0_GNSSBB_I_P
WTR0_GNSSBB_Q_P
WTR0_DRXBB_Q_P
WTR0_DRXBB_Q_N
WTR0_DRXBB_I_P
WTR0_DRXBB_I_N
WTR0_TX_HB2_OUT
WTR0_PRX_LB4_IN
WTR0_PRX_HB1_IN
WTR0 DAC IREF
WTR0_PRX_LB1_IN
93, 74
52, 59
57
14
38
25
136
135
115
149
48
78
103
147 116
157
62
80
129
79
90
126
100
NOTE1
NOTE1
NOTE2
TP2(2.05V)
TP1(1.225V)
TP3(1.8V)