User Guide

Figure 117 Internal speaker circuitry

External earpiece

Galvanic accessories are connected to the AV connector.

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

phone accessories.

The Avilma ASIC provides two output channels in either single-ended or differential format. The Avilma ASIC

outputs XearL and XearLC form the left channel audio output and XearR and XearRC the right channel audio

output. XearLC and XearRC are the ground pins if the output works in a single-ended operation.

Figure 118 External earpiece and microphone circuitry

Vibra circuitry

Vibra is used for the vibra alarm function.

The vibra motor is connected to the Avilma ASIC VibraP and VibraN Pulse Width Modulated (PWM) outputs.

RM-135

Nokia Customer Care System Module and User Interface

Page 7 –34 COMPANY CONFIDENTIAL Issue 1