Nokia 6610i Service Manual
RM-37
Company confidential
7-System Module and User Interface
CCS Technical Documentation
Page 38
©Nokia Corporation.
Issue 1 04/2004
by the UEM and the earpiece driver in UEM is a bridge amplifier. In RM-37, 8mm PICO
type earpiece is used.
type earpiece is used.
Figure 13: Internal speaker
IHF Speaker & Stereo Audio Amplifier
Integrated Hands Free Speaker, 16mm MALT, is used to generate speech audio, alerting
and warning tones in RM-37. Audio amplifier is controlled by the UPP. Speaker capsule is
mounted in the C-cover. Spring contacts are used to connect the IHF Speaker contacts to
the main PWB.
and warning tones in RM-37. Audio amplifier is controlled by the UPP. Speaker capsule is
mounted in the C-cover. Spring contacts are used to connect the IHF Speaker contacts to
the main PWB.
Figure 14: Digital Interface of Audio Amplifier
Common mode
choke
EARP
EARN
UEM
Output
Mode
Select
Mode
Select
Digital
Volume
Control
Volume
Control
Bias
Bypass
Rin
Lin
EN
CLK DATA
Lout -
Lout +
Rout -
Rout +
out -
out +
VBAT
GND
Phone In HS
Cs = 1 uF
Radio audio
IHF Speaker
Radio audio
Stereo Headset
Amplifier
Amplifier
Amplifier
SPI
Phone In IHF