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RM-509; RM-510; RM-511
RF Troubleshooting
Figure 29 BT antenna
GPS antenna functionality
The GPS antenna is a ceramic SMT type. The GPS antenna as such is built up with the ceramic SMT component
and the wires on the PWB which can be seen on top face. This structure (ceramic component plus wires) is
tuned with two tuning components to the GPS frequency of 1575 MHz.
Figure 30 GPS antenna and main antenna contact clips
Antenna troubleshooting
Main antenna
Check that the GND and feed pads take proper contact to the C-Clips on the main PWB. Also check visually that
all the matching components are soldered on the flex. In case of damage, the whole antenna module needs
to be replaced.
If only low band or high band is working properly, it may indicate a faulty matching network. Defects in the
solderings or breaks in the wiring of matching should be seen. In this case, also antenna module needs to
be replaced.
Page 4 –28
COMPANY CONFIDENTIAL
Issue 2
Copyright © 2009 Nokia. All rights reserved.
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