LG Nexus 5 Service Manual

3. TROUBLE SHOOTING
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Check TP1
Check TP1 
Signal Exist?Check the DRX Level
Yes
Yes
Yes
No
No
No
Check the U2004
(WTR1605L-1)
Check TP2 
Signal Exist?Check the FL2003
Check TP3 
Signal Exist?
Check the FL2008
(B20 DRx SAW Filter)   

3. TROUBLE SHOOTING
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3.6 GPS Trouble shooting
3.6.1 GPS IC Component
Reference No.DescriptionReference No.Description
FL2011SAW FilterU2005GPS LNA
FL2009GPS & B7/41 DiplexerSW2001RF SWITCH
ANT2003GPS ANT (Signal)U2004WTR1605L
ANT2002GPS ANT (GND)
U2004
BOT   

3. TROUBLE SHOOTING
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3.6.2 GPS SIGNAL PATH 
BOT
BOT
U2004
GPS INMGPS INP
16G32G
D820
D821
12 C
D E F G
H J
K
LM
N
B
A
1 P
N
A
BC
D H
G
FE M
L
K
J
1
14
1
9
9
10
11
20
D
3
A
1
3233
64
3536
70
17
18
34
2021
40
15
16
30
J10000
U13000
L200
0
R102 5
C2088
L7002
U1007
C106 9
C13050
L2032
U5001
L7000
C13012 C2082
L203
7
C2091
C1023
C1 1001
C106 1
C4124
FL1001
C6057
C2026
C9026
C2041
R11012...

3. TROUBLE SHOOTING
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3.6.3 Checking GPS 
START
Check the connection
between Antenna & C-Clip
1. Replace antenna on battery cover,
or, C-Clip on PCB.
2. Remove the foreign substance in ANT2003
No
Yes
Yes
Check WTR1605L
Yes
Check TP1
C2073, C2074 = 2.7V
Check TP2
19.2MHz Clock exist?
The problem may be refer to PMIC block,
Check PM8941.
Check 19.2MHz XTAL. (X6000) 
No
No   

3. TROUBLE SHOOTING
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BOT
Schematic of GPS LNA Block
16G32G
D820
D821
12 C
D E F G
H J
K
LM
N
B
A
1 P
N
A
BC
D H
G
FE M
L
K
J
1
14
1
9
9
10
11
20
D
3
A
1
3233
64
3536
70
17
18
34
2021
40
15
16
30
J10000
U13000
L200
0
R102 5
C2088
L7002
U1007
C106 9
C13050
L2032
U5001
L7000
C13012 C2082
L203
7
C2091
C1023
C1 1001
C106 1
C4124
FL1001
C6057
C2026
C9026
C2041
R11012
SC1202 1C13059
L2017...

3. TROUBLE SHOOTING
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TOP
X6000
U6002
(PM8941)
BOT
U2004
TP2   

3. TROUBLE SHOOTING
- 127 -Copyright © 2013 LG Electronics. Inc. All right reserved.Only for training and service purposesLGE Internal Use Only
Schematic of WTR1605L
R20194.75K
DNI
C2078
0
R2017100p
C2027
86 100
45
89 80 93 60 79 120 105 121 88 114 96 71 70 62 56
GNSS_BB_IP
GNSS_BB_IM
GNSS_BB_QP
GNSS_BB_QM
DNC4
DNC5
GP_DATA2
GP_DATA1
GP_DATA0
XO_IN
VTUNE_PRX
RBIAS
DNC3
SSBI_PRX_DRX
SSBI_TX_GNSS
RX_ON
RF_ON
DNC1
XO_OUT_A0
RF_ON0
RX_ON0
WTR_GNSSBB_I_P
WTR_GNSSBB_I_M
WTR_GNSSBB_Q_P
WTR_GNSSBB_Q_M...

3. TROUBLE SHOOTING
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3.7 WIFI/BT Trouble shooting
3.7.1 WIFI/BT IC Component
Reference No.DescriptionReference No.Description
FL13000DiplexerU130012.4G SP3T+LNA
FL13001SAWU130025G SP2T+LNA
U13000WIFI/BT ChipX13000Crystal
BOT
U13000
U13001
U13002
FL13001
FL13000
X13000   

3. TROUBLE SHOOTING
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3.7.2 WIFI/BT Signal Path_Tx / Rx
Tx Path
Rx Path
BOT
U13000
U13001
U13002FL13001
2.4G5G
FL13000
ANT
X13000   

3. TROUBLE SHOOTING
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3.7.3 WIFI/BT Signal Path_Tx
Tx Path
BOT
U13000
U13001
U13002FL13001
2.4G
ANT Matching
5G
FL13000
ANT
X13000