Check Earpiece Using "Ext Microphone In Hp Speaker Out" Loop; Check Ihf & Ringing Tone Function Using "Buzzer - Nokia RH-64 Service Manual

RH-64
Baseband troubleshooting

Check earpiece using "Ext microphone in Hp 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 "Ext microphone in Hp speaker out"
4. Select "Loop" as "On"
5. Input signal to XMICP/N pads, as shown in Figure PWB audio test points above, for example 100 mVpp, 1 kHz.
6. Check if sound is heard in earpiece.
Check IHF & ringing tone function using "Buzzer"
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. In "Buzzer" area, select suitable signal to be played, for example 1 kHz, Strength 5"
4. Select "Volume" as "On"
5. Check if sound is heard in IHF.
9243363 (Issue 1)
Figure 95 Test arrangement for microphone
Figure 96 Test arrangement for of earpiece
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