Acoustics Troubleshooting; Introduction To Acoustics Troubleshooting - Nokia MOBILE TERMINAL Service Manual

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BB Troubleshooting and Manual Tuning Guide

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 includes three basic systems: earpiece,
Integrated Hands Free (IHF) and microphone.
The sound reproduced from the earpiece radiates through a single hole on the front cover (A-cover). The
sound reproduced from the IHF speaker radiates through a single sound hole located at the top of the phone.
The microphone is located on the left corner of the USB connector at the bottom of the phone.
For a correct functionality of the phone, all sound holes must be always open. When the phone is used, care
must be taken not to close any of those holes with a hand or fingers. The phone should be dry and clean,
and no objects must be located in such a way that they close any of the holes.
Issue 1 COMPANY CONFIDENTIAL Page 3 –67
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