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RM-609
BB Troubleshooting and Manual Tuning Guide
FM radio testing
Steps
1. Set signal generator parameters:
• FM modulation on
• Frequency 100MHz
• FM deviation 22kHz
• Modulation frequency 1kHz
• RF level should be varied during the test to obtain good audio signal quality
• Connect suitable antenna to signal generator
Note:
You may alternatively use a known good FM radio broadcast as a test signal.
2. Attach the Nokia headset to the phone's AV connector.
3. Use Scroll button to autotune to the radio frequency.
4. Set volume to suitable level.
5. Check audio quality with a headset.
GPS troubleshooting
GPS layout and basic test points
The GPS components are located on the bottom side of the PWB. The GPS chip and associated components
are in a can which does not have a removable lid. Satellite signals are picked up by the GPS antenna in the
B-cover. The signal is then routed through a diplexer and then a filter before being processed by the GPS5350
receiver ASIC.
GPS settings for Phoenix
Quick Test window
This test will perform 3 tests in one: Self test, Oscillator Test and CW Test and will provide a Pass/Fail Response
for each. The HW Self Test confirms basic communication with the GPS ASIC. The oscillator test confirms the
frequency accuracy of the GPS TCXO against the Ref_Clk. The CW Test confirms end-to-end connectivity
between the GPS antenna and the GPS ASIC. It also contains a receive button.
Before this test is performed a known good phone should be tested in order to calibrate the setup. The signal
level of the Signal Generator should be adjusted so a reading of SNR 35 dB is achieved with the reference
unit. A good starting point is to set up the signal generator to -50 dBm.
These checks are part of
Issue 1
GPS failure troubleshooting .
COMPANY CONFIDENTIAL
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