User Guide

External earpiece troubleshooting

Troubleshooting flow

External microphone 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 speaker(s). 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 (located under the battery cover) radiates from the sound holes on

the battery cover. The microphone is located inside the fold (in the lower block) at the bottom right corner.

RM-443

BB Troubleshooting and Manual Tuning Guide

Issue 2 COMPANY CONFIDENTIAL Page 3 –35