Nokia RM-761 Service Manual page 58

RM-761; RM-799; RM-800
BB Troubleshooting and Manual Tuning Guide
2 Open "audio control" window from "Testing –> Audio control", as shown in Figure Phoenix audio control
window above.
3 Select "HP mic to AV ear".
4 Set "Activate" on.
5 Input sound at microphone port, for example 94dB SPL 1kHz.
6 Check if signal is detected at HS_EAR_L/R pads, as shown in Figure "PWB audio test points" above.
Figure 25 Test arrangement for microphone
Figure 26 Internal microphone troubleshooting flow
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