Nokia 2650 - Audio Internal; Earpiece;Ringer

RH-53/54
Nokia Customer Care 8-System Module
24 COMPANY CONFIDENTIAL Issue 2 06/2005
Copyright © 2005 Nokia. All Rights Reserved.
■ Audio Internal
Earpiece/Ringer
The transducer used both as earpiece and ringer is the 16 mm loudspeaker called MALT. This
solution will implement polyphonic ringing tones.
Figure 5:Earpiece/ringer interface
Interface to
external audio
HFCM
HF
XEARP
XEARN
UEM
100n
4k7
33k
IN-
MALT
Vo1
Vo2
UPP
GENIO14
IN+
BYPASS
470 n
SHUTDOWN
Interface to
DC-out
Vdd
1u
GND
Vbat
33k
4k7
100n
330p
Placed near
UEM
Placed outside
BB-can, near the
connections to
MALT
Not used / NA
330p
EARN
EARP
10
10