Nokia RM-305 - Check Microphone Using Hp Microphone in Ext Speaker Out Loop; Check Earpiece Using Ext Microphone in Hp Speaker Out Loop

Figure 22 PWB audio test points
Check microphone using "Hp microphone in Ext speaker out" loop
Steps
1. Connect phone with Phoenix.
2. Open “audio test” window from “Testing -> Audio test”, as shown in
Figure Phoenix audio test window
above.
3. Select “Hp microphone in Ext speaker out”
4. Select “Loop” as “On”
5. Input sound at microphone port, for example 94dB SPL 1kHz.
6. Check if signal is detected at XEarL/R pads, shown in Figure PWB audio test points above.
Figure 23 Test arrangement for microphone
Check earpiece using "Ext microphone in Hp speaker out" loop
Steps
1. Connect phone with Phoenix.
RM-305; RM-306
Baseband troubleshooting
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