Internal handsfree (IHF) troubleshooting
Troubleshooting flow
Acoustics troubleshooting
Introduction to acoustics troubleshooting
Acoustics design ensures that the sound is detected correctly with a microphone and properly radiated to
the outside of the device by the speaker. The acoustics of the phone include three basic systems: earpiece,
integrated handsfree (IHF) and microphone.
The sound reproduced from the earpiece eradiates through a single hole on the front cover (A-cover). The
sound reproduced from the IHF speaker radiates from the sound hole located on the backside on the bottom
part of the phone. The inlet for the microphone can be found in the keymat area.
RM-781
BB Troubleshooting and Manual Tuning Guide
Issue 1 COMPANY CONFIDENTIAL Page 3 – 43
Copyright © 2011 Nokia. All rights reserved.
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