Introduction to RF troubleshooting
All measurements should be done using:
• spectrum analyser with a high-frequency high-impedance passive probe (LO-/reference frequencies and
RF power levels)
• oscilloscope with a 10:1 probe (DC-voltages and low frequency signals)
The RF section of the phone is around RF ASIC N7505, TX FEM N7520, and all of this RF section is built inside
of non-removable shields A7506, A7507. Therefore, the engine will be replaced after carefully checked power
and receiver tuning at antenna port.
RF key component placement
RM-88
RF Troubleshooting and Manual Tuning Guide Nokia Customer Care
Issue 1 COMPANY CONFIDENTIAL Page 7 –5
Copyright © 2006 Nokia. All rights reserved.
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