Checking Transceiver Dc Power Supply Circuit Block - LG -D802 Service Manual

3.2 Checking Transceiver DC Power Supply Circuit Block

TP1(1.3V)
TP1(1.3V)
+1V3_VREG_L4
TP2(1.8V)
+1V8_VREG_S3A
TX_OUT_B7
TX_OUT_GSMHB
TX_OUT_B1_B2
TX_OUT_B4
TX_OUT_B5
TX_OUT_GSMLB
TX_OUT_B17
LGE Internal Use Only
TP2(1.8V)
U2002
TP3(2.05V)
STAR CONNECTION
103
TX_HB
95
TX_MB4
112
TX_MB3
119
TX_MB2
126
TX_MB1
133
TX_LB4
141
TX_LB3
132
TX_LB2
140
TX_LB1
BOT
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3. TROUBLE SHOOTING
TP3(2.05V)
+2V05_VREG_L15
130
TX_BB_IP
WTR_TXBB_I_P
138
TX_BB_IM WTR_TXBB_I_M
131
TX_BB_QP
WTR_TXBB_Q_P
139
TX_BB_QM WTR_TXBB_Q_M
109
DAC_REF
WTR_DAC_IREF
84
PRX_BB_IP
WTR_PRXBB_I_P
92
PRX_BB_IM
WTR_PRXBB_I_M
91
Only for training and service purposes