User Guide

Figure 130 Audio block diagram

Earpiece

The earpiece is driven by differential signals from UEMEK (EARP & EARN). It makes contact with the PWB via

spring contacts.

Microphone

Two inputs are used from UEMEK, one for the normal internal microphone and the other for the headset. The

third microphone input is used for FM. The microphone bias block in UEMEK generates bias voltages for

handportable and handsfree/headset microphones. The microphone makes contact with the PWB via spring

contacts.

Button vibra

The button vibra is a new concept vibra. The rated voltage is 3.2 volt and it needs a sweep frequency (140 to155

Hz, 5Hz at 20ms steps) to reach the resonance frequency.

RM-13/33

System Module Description Nokia Customer Care

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