LG TracFone LG840G Service Manual page 74

PART 2
RGR6240 GPS RF Receiver
1. Check TP2 is 1.3V
2. Check TP2 is 1.8V
3. Check TP3 has same wave-
form Whit next page
GPS_SSBI
C843
XO_OUT_GP2
TP3
C846
B9417
2 3
C851 FL803
G1 O1
1
IN
G2 O2
100p
1575.42MHz
5 4
C854
LGE Internal Use Only
C835
10u
10n
C844
C845
22p
120p
L807
9.1n
33p
C847
C848
DNI
DNI
L810
9.1n
33p
R806
2.2
C836
1n
ADC_CLK
E4
U803
RF_P
RGR6240
E5
RF_N
EUSY0374001
- 74 - Copyright © 2012 LG Electronics. Inc. All right reserved.
4. TROUBLE SHOOTING
TP3
TP2
VREG_RFRX2_1.3V
TP1
C837 C838 C839
100p 0.1u 1n
R807
10
C841 C842
100p 1u
R809
B3
51
B4
BLANK
R811 51
A4
DI
R812 51
A5
DQ
C3
RBIAS
R814
10K
close to RGR6240
Only for training and service purposes
TP1
VREG_MSME_1.8V
TP2
GPS_ADC_CLK_XO
GPS_ADC_I
GPS_ADC_Q