Checking Transceiver Dc Power Supply Circuit Block - LG -D620 Service Manual

3.2 Checking Transceiver DC Power Supply Circuit Block

TP3(1.8V)
+1V8_VREG_L10
+2V05_VREG_L9
TP2(2.05V)
WTR0_TX_LB1_OUT
WTR0_TX_LB2_OUT
WTR0_TX_LB3_OUT
WTR0_TX_MB2_OUT
WTR0_TX_MB3_OUT
WTR0_TX_MB4_OUT
WTR0_TX_HB1_OUT
R1500
WTR0_TX_HB2_OUT
WTR0_PDET_IN C1539 33p
18
WTR0_PRX_LB1_IN
WTR0_PRX_LB2_IN
WTR0_PRX_LB3_IN
WTR0_PRX_MB1_IN
WTR0_PRX_MB2_IN
WTR0_PRX_MB3_IN
WTR0_PRX_HB1_IN
LGE Internal Use Only
U1500
<Main Top>
162
TX_LB1_OUT
153
TX_LB2_OUT
163
TX_LB3_OUT
154
TX_LB4_OUT
146
TX_MB1_OUT
138
TX_MB2_OUT
139
TX_MB3_OUT
155
TX_MB4_OUT
130
TX_HB1_OUT
121
TX_HB2_OUT
117
PDET_RFFB
102
PRX_LB1_IN
92
PRX_LB2_IN
73
PRX_LB3_IN
65
PRX_LB4_IN
51
PRX_MB1_IN
43
PRX_MB2_IN
27
PRX_MB3_IN
9
PRX_HB1_IN
- 39 -
3. TROUBLE SHOOTING
TP1(1.225V)
TP2(2.05V)
TP3(1.8V)
NOTE1
U1500
WTR1625L
Copyright © 2014 LG Electronics. Inc. All right reserved.
TP1(1.225V)
+1V225_VREG_L1
160
TX_BB_IM WTR0_TXBB_I_N
151
TX_BB_IP WTR0_TXBB_I_P
161
TX_BB_QM
WTR0_TXBB_Q_N
152
TX_BB_QP WTR0_TXBB_Q_P
108
PRX_BB_IM
WTR0_PRXBB_I_N
99
PRX_BB_IP
WTR0_PRXBB_I_P
97
PRX_BB_QM WTR0_PRXBB_Q_N
107
PRX_BB_QP WTR0_PRXBB_Q_P
86
DRX_BB_IM
WTR0_DRXBB_I_N
76
DRX_BB_IP WTR0_DRXBB_I_P
68
DRX_BB_QM WTR0_DRXBB_Q_N
61
DRX_BB_QP
WTR0_DRXBB_Q_P
60
WTR0_GNSSBB_I_P
GNSS_BB_IP
53
WTR0_GNSSBB_I_N
GNSS_BB_IM
67
WTR0_GNSSBB_Q_P
GNSS_BB_QP
85
WTR0_GNSSBB_Q_N
GNSS_BB_QM
Only for training and service purposes