Acoustics Troubleshooting; Introduction To Acoustics Troubleshooting - Nokia RM-164 Service Manual

RM-164
BB Troubleshooting and Manual Tuning Guide

Acoustics troubleshooting

Introduction to acoustics troubleshooting

Note: Always make sure all openings are clean and all contact pads are intact and make contact. If
audio still does not work, please continue to the electronic audio troubleshooting (2nd diagram
where applicable).
Acoustics design ensures that the sound is detected correctly with a microphone and properly radiated to
the outside of the device by speaker(s). The acoustics of the phone includes three basic systems: earpiece,
Integrated Hands Free (IHF) and microphone.
The sound reproduced from the earpiece readiates through a single hole on the front cover (A-cover). The
sound reproduced from the IHF speaker radiates from a single sound hole located 3 cm below the power key.
The microphone is located at the hinge, next to the system connector.
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.
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