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Flow Chart of Troubleshooting
9-86
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9-2-14. Abnormal GPS Rx Operation
1. Check
SAW filter input
2. Check
GLNA_ON
3. Check
LNA Output
4. Check
RX_GPS
Operate
Signal = -50dBm
@ANT200
Check F200 PIN4
≥
-80dBm
NO
Change or Resolder
F200, L202, L204,
YES
NO
Check LNA200
PIN5 = 1.8V
Check or Resolder
UCP300, R200
Change or Resolder
LNA200, L200,
L201, C200
NO
RFT100
PIN42 ≥
-80dBm
YES
YES
END
Change or Resolder
C203, C204,
C208, L144
NO
RFT100
PIN42 ≥
-80dBm
YES