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4.5.5 Check RF Rx Level
TP1
ANT101 ANT102
ANT100
56p
SW100
0
G2
ANT
RF
R643
C100
G1
56p
C102
KMS-507
NA
C104
C101
NA
ANT_SEL0
ANT_SEL1
ANT_SEL2
TP2
OUT
50OHM
1
C609
NA
R642
0
C608
1.2p
TX
ANT
8
RX
FL509
SAYDT1G95AF0B00R05
TP3
TP2
Bias1
Test Point (RF Rx Level)
VREG_RFRX_0_2.85V
U100
3
4
OUT2
VCONT
AC_T_N
2
5
GND
IN
1
6
R100
OUT1
VDD
10K
L504
UPG2010TB-E3
C106
NA
33p
RF_OUT
FL508
LMSP54MA-543
11
19
GSM900_RX1
14
20
VC1
GSM900_RX2
15
VC2
16
21
VC3
GSM1800_RX1
22
GSM1800_RX2
13
VDD
23
GSM1900_RX1
1
24
GND1
GSM1900_RX2
2
GND2
4
3
GND3
GSM1800_1900TX
5
6
GND4
GSM900TX
8
7
GND5
UMTS2
10
9
GND6
UMTS1
12
GND7
17
25
GND8
PIN_DIREC1
18
26
GND9
PIN_DIREC2
HDET
4
U106 LMV225TLX
R132
1K
C186
100p
A1
RFIN_EN
B1
GND
R133
PA_ON
10K
ILNA_OUT
L130
C191
12p
L131
1.2nH
C192
L505
1.2p
27nH
VREG_RFRX_1_2.85V
C196
0.1u
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4. TROUBLE SHOOTING
TP3
TP4
TP4
FL101
2
3
C162
R125
G1
O1
1
ILNA_OUT
IN
G2
O2
0
8p
B7827
5
4
L127
3.9nH
0.01u
VREG_RFTX_2.85V
A2
VREG_RFTX_2.85V
VDD
B2
HDET1
OUT
C188
C189
1200p
27p
100nH
C193
680p
RX_QM
C197
10p
RX_QP
RX_IM
RX_IP
C81
C82
0.1u
100p
TP1
C158 22p
IMT_RX_P
L123
1.5nH
C163
0.1u
L124
27nH
L125
1.5nH
C170 22p
IMT_RX_M
IMT_RX_P
IMT_RX_M
13
49
PLNA_OUT
PGND
14
48
ILNA_OUT
GLNA_BIAS
15
47
PLNA_BIAS
GLNA_IN
16
46
R137
PLNA_IN
R_BIAS
17
45
11.3K
ILNA_BIAS
VDDA8
(1%)
18
44
ILNA_IN
SBST
19
43
RFR6250E
VDDRF3
SBDT
20
42
RX_IP
SBCK
U107
21
41
RX_IM
VDDM
22
40
RX_QP
GRX_IP
23
39
RX_QM
GRX_IM
24
38
VDDA2
GRX_QP
37
GRX_QM
R139
0
R140
C198
3300
C199
(PPS)
0.01u
C80
3.9n
470p
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Troubleshooting
