User Guide

Figure 46 Internal microphone circuitry in UI flex PWB

Figure 47 Internal microphone circuitry in engine PWB

External microphone

Galvanic accessories are connected to the system connector.

Accessory audio mode is automatically enabled/disabled during connection/disconnection of dedicated

phone accessories.

Figure 48 External microphone circuitry

Internal earpiece

The internal earpiece is used in the HandPortable (HP) call mode. A dynamic 8 mm earpiece capsule is

connected directly to the EM ASIC (N2200) differential outputs EarP and EarN through the flip flexi PWB and

micro coaxial cable (X6 - X8900).

Internal speaker

The internal speaker is used in Internal HandsFree (IHF) call mode.

A dynamic 16 mm speaker is connected to the EM ASIC (N2200) outputs HFSpP and HFSpN through the flip

flexi PWB and micro coaxial cable (X6 - X8900).

The IHF amplifier integrated in N2200 is a Digital Pulse Modulated Amplifier (DPMA).

RA-6

System Module

Issue 1 COMPANY CONFIDENTIAL Page 6 –25