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Description
Test Point
1
RX_2.85V
2
GPS_MODE
3
SAW Input
4
SAW Input
5
LNA Input
6
SAW output
Table 25 GPS RF troubleshooting test points Shown in Figure 46.
GPS Path Troubleshooting
Troubleshooting flow
Check DC test point in the
Check DC test point TP2 in
Check TP3 in the Table 25.
Check TP4 in the Table 25.
Check TP5 in the Table 25.
Check TP6 in the Table 25.
Page 4-22
2.8V
2.6V
Atten 3dB
Atten 7dB
Gain 5~15dB
Atten 3dB
GPS path test
procedure
Table 25.
Is it ok ?
Yes
the Table 25.
Is it ok ?
Yes
Is it ok?
Yes
Is it ok?
Yes
Is it ok?
Yes
Is it ok?
Yes
End
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Value
1. Check U403 , U205
No
2. Check soldering point of the peripheral circuit
3. Change defect component
1. Check U301
No
2. Check soldering point of the peripheral circuit
3. Change defect component
1. Check Carkit
No
2. Check soldering point of the peripheral circuit
3. Change defect component
1. Check SAW101
No
2. Check soldering point of the peripheral circuit
3. Change defect component
1. Check U103
2. Check soldering point of the peripheral
No
circuit
3. Change defect component
1. Check F201
2. Check soldering point of the peripheral
No
circuit
3. Change defect component
RM-384
RF Troubleshooting
Check
component
U403,U205
U301
RF connector
SAW 101
U103
F201
Issue1
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