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RM-36
BB Troubleshooting and Manual Tuning Guide
Nokia Customer Care
Legend
If a special low-pass filter designed for measuring digital amplifiers is unavailable, the measurement must be
performed with a current probe and the input signal frequency must be 2kHz.
Figure 62 Differential output waveform of the Ext_in_IHF_out out loop measurement when speaker is connected.
Figure 63 Single-ended output waveform of the HP_in_Ext_out loop when microphone is connected.
Internal earpiece troubleshooting
Before you begin
Familiarize yourself with the
Audio troubleshooting test instructions (Page
6–50).
Issue 1
Company Confidential
Page 6–53
Copyright ©2005 Nokia. All Rights Reserved.
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