User Guide

Internal earpiece

The internal earpiece is used in the HandPortable call mode. A dynamic earpiece capsule is connected to the

EM ASIC N2200 differential outputs EarP and EarN. Internal earpiece is placed on UI / Slide Module.

Figure 49 Internal earpiece schematics

Internal speaker

The internal speakers are used in Internal HandsFree (IHF) call mode and for ringing tones. They can also be

used for example with GPS navigation instructions or with Music Player. Two dynamic speakers are connected

to the N2120 stereo amplifier. Signal to the amplifier comes from N2200 outputs XearL and XearR.

Figure 50 Stereo IHF connection

External earpiece

All galvanic accessories are connected to the AV-connector. Any accessory with 3.5mm plug can be used.

Accessory detection mechanism is described in separate chapter. Stereo signal to external earpiece comes

from N2200 outputs XearL and XearR. Attenuation is needed before headphone amplifier in the use case

where ringing tone is played from IHF speakers and earpiece simultaneously.

RM-313

System Module

Page 6 –22 COMPANY CONFIDENTIAL Issue 1