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RM-626
Cellular RF troubleshooting
Figure 22 GSM/WCDMA antennas
Bluetooth and WLAN RF interfaces are connected to one common antenna flex. RF feed from the main PWB
to the BT/WLAN antenna flex is realized by two C-clips. Similar contact manner is also used for the GPS antenna.
Figure 23 WLAN/Bluetooth and GPS antennas
Antenna troubleshooting
Cellular antenna
GSM/WCDMA antenna performance should be normal if the antenna contact pads take a proper contact to
the corresponding C-clips on the small adapter PWB (see the figure below), the antenna flex assembly is
visually intact, both coaxial cables are properly connected (both ends) and the cables are undamaged. Check
that the C-clips are clearly open and the matching capacitor C7000 (12pF) has been soldered to the PWB.
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