Introduction To Acoustics Troubleshooting - Nokia RM-70 Service Manual

RM-70
BB Troubleshooting and Manual Tuning Guide Nokia Customer Care

Introduction to acoustics troubleshooting

Acoustics troubleshooting
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 speakers radiates from left and right sound holes located on both sides of
the device. Microphone is located at the bottom, 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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