Nokia RM-243 Service Manual

Figure 47 Internal earpiece circuitry
Internal speaker
Internal speaker is used for Internal HandsFree (IHF) call mode, video call, ringing tones, FM radio and music
listening.
One dynamic 11x15mm speakers is connected to Avilma ASIC’s outputs HFSPP/HFSPN.
Figure 48 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 from the right channel
audio output. XearLC and XearRC are the ground pins if the output works in a single-ended operation.
RM-243
System Module and User Interface
Issue 1 COMPANY CONFIDENTIAL Page 6 –21
Copyright © 2007 Nokia. All rights reserved.

Nokia RM-243 Specifications

General

Brand	Nokia
Model	RM-243
Category	Handhelds
Language	English