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Appendix.
Rx Flow Chart & Solution
6-A) Check Placement of U103
6-B) Check U107(Mobile Switch) Pin 1,2 (S/W Signal Line) Using Spectrum Analyzer
Yes
RF Output ?
6-C) Check U103 Pin 9, 16, Using Spectrum Analyzer.
Yes
RF Output ~ -70dbm ?
RX Path Working !
GSM Handsets Lab.
No
No
66
Check Soldering
Replace U107
6-B) Test!!
Replace U103
6-C) Test!!
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