Table of Contents
Advertisement
Customer Care
8.3 Earpiece/Loudspeaker
8.3.1 Mechanical
The speakermodule is designed to provide optimal performance for mobile handsfree and
sound ringer. Plus independent from mobile leakage sound performance. Therefore
speakermodule is a system that has a closed front volume with sound-outlets towards the
ear of the user. Backvolume of Speakermodule is using the unused air between the
antenna and the PCB. Backvolume is just used for resonance, there is no sound output
from backvolume. The speakermodule is glued to the lightguide and contacted via two
bending springs to the PCB. The lightguide itself is screwed with six screws via the PCB
to the mounting frame lower part. Two of the six screws are located besides of the
connection of speakermodule and lightguide. Therefore a good and reliable connection
between speakermodule and PCB should be provided.
8.3.2 Electrical
The internal and external Loudspeaker (Earpiece) is connected to the voiceband part of
the
EGOLD+
(
) via audio amplifier inside the ASIC (D361). Input
Analog Interface B1, C1
EPN1_FIL - EPP1_FIL.
Output for external loudspeaker
AUDIO_L - AUDIO_R,
for internal
Loudspeaker
EPP! – EPN1.
The ringing tones are generated with the loudspeaker too. To
activate the ringer, the signal
RINGIN
from the EGOLD+ (
) is used
Miscellaneous,D16
to ASIC
from Smarti IC
EGOLD+
V 1.0
Page 49of 52
ICM MP CCQ GRM
SL55
06/03
Company Confidential © Copyright Siemens AG
Advertisement
Table of Contents
