External Microphone Troubleshooting - Nokia RM-761 Service Manual

RM-761; RM-799; RM-800
BB Troubleshooting and Manual Tuning Guide

External microphone troubleshooting

Steps:
1 Connect phone with Phoenix.
2 Open "audio control" window from "Testing –> Audio control", as shown in Figure Phoenix audio control
window above.
3 Select "AV mic to AV ear".
4 Set "Activate" on.
5 Input sound at AV mic port, for example 94dB SPL 1kHz.
6 Check if signal is detected at HS_EAR_L/R pads, shown in Figure PWB audio test points above.
Issue 1
Figure 31 Test arrangement for external microphone
Figure 32 external microphone troubleshooting flow
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