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4. TROUBLE SHOOTING
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Copyright © 2012 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
PART 2
RGR6240 GPS RF Receiver
1. Check TP2 is 1.3V
2. Check TP2 is 1.8V
3. Check TP3 has same waveform Whit next page
TP1
TP2
TP3
60
FB701
C720
100p
51
R713
10u
C714
C723
22p
FL702
1575.42MHz
4
5
1
3
2
G1 O1
IN
G2 O2
100p
C716
R707
2.2
VREG_TCXO_2.85V
R711
51
60
FB702
C718
1n
C719
10p
10
R708
1u
C721
120p
C724
DNI
C727
0.1u
C717
U701
E3
E1
D
4
D
2
C4
C1
A3
A1
C3
E5
A5
A4
E4
B4
B3
D
1
B2
B5
E2
D
5
D
3
C5
C2
B1
A2
VDD_D
1
VDD_D
2
VDD_A
1
VDD_A
2
VDD_A
3
VDD_A
4
VDD_A
5
SSBI
TCXO
PLL_CA
P
ADC_CLK
BLANK
RF_P
DI
DQ
RF_N
RBIAS
GND
1
GND
2
GND
3
GND
4
GND
5
GND
6
GND
7
GND
8
6.8n
L705
C733
10n
3.9n
L703
L708
9.1n
1n
C715
C725 33p
L704
9.1n
C722
10n
C726
DNI
VREG_MSME_1.8V
C732 33p
R712
51
100p
C730
VREG_RFRX2_1.3V
DNI
L707
R714
100K
U702
4
3
5
2
6
1
7
PGND
NC1
VDD
RF_IN
RF_OUT
NC2
VSD
GPS_ADC_Q
GPS_ADC_CLK_XO
GPS_SSBI
GPS_ADC_I
XO_OUT_GP2
GPS_LNA_EN
10K
close to RGR6240
TP1
TP2
TP3