3. TROUBLE SHOOTING
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3.8.2 Checking GPS RF Signal path
START
No
No
No
Not good
OK?
Check next step
Check TP1 Signal exist?
Check TP2 Signal exist?
Check TP3 Signal exist?
Check Transceiver physical damage
or soldering condition
Check CN1002 (Antenna feeding clip)
oldering
Check FL1005
Check U1005
Replace U1002
Yes
Yes
Yes
DNI
C1102
C1051
100p
L1020
DNI
DNI
L1019
R1011
10
L1021
6.8n
820
R1012
C1058
1p
C1060
33p
C1059
100n
C1046
8.2n
6.8p
C1061
FL1005
10
8
9
4
7
5
1
6
3
2
G1
G2
G4
ANT
G3
G7
GPS/GLONASS_OUT
Non-GPS/GLONASS_OUT
G5
G6
2.2n
L1025
+2.7V_L18_RF_SW_GPS
L1017
0.5p
1n
L1022
100p
C1048
CN1002
MBV62521801
FEED
CN1001
MBV62521801
FEED
L1023
1.8n
U1005
4
5
3
6
2
7
1
8
GND4
VD
D
VCTR
L
RFIN
GND3
GND1
RFOUT
GND2
GNSS_ELNA_EN
WTR_GPS_IN
LNA+Filter
TP1
TP2
TP3