Rf Connector Failure - Nokia 3806 Service Manual

RF connector failure

The RF connector fails when it does not properly connect RF input terminal to RF output terminal during
SMT. If this happens the antenna gain degrades by 25 dB. Check this failure by measuring the
resistance value between the input and output of RF connector, if the value is close to zero, replace the
RF connector.
Note: Do not insert RF cable to RF connector when testing the resistance value. Because the RF
connector is also a switch, when RF cable is inserted, RF output is disconnected from RF input.
RF input terminal – connect to duplexer.
RF output terminal – connect to the antenna pad through antenna match circuit.
RF connector terminal – connect to RF coaxial cable.
Figure 5: RF input / output terminal for main antenna
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COMPANY CONFIDENTIAL
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Antenna Description and Troubleshooting
RM-583
Issue 1