Service Manual
3. Baseband Section
13
3.3 Audio Section
3.3.1 Audio Scheme
The audio module is mainly for audio input and output. TLV320AIC29 (U3003) is used as the
audio codec to convert and process audio signal and digital signal. The Class AB BTL
amplifier TDA7297SA (U3009) is used to amplify the output audio signal.
Audio Codec
TLV320AIC29
OMAP-L138
MCASP
(ACLKX)
IIS
INT
SPK+/-
EPWM0B
AXR8/15
R261
26-Pin
Interface
MIC0
EXT_MIC1
AXR
0
/7
Key
Voice
A_OUT1
MICIN_HND
CP_IN
SPK
OUT1
AF power AMP
Handset_Audio
SPK
OUT2
RX_Audio
PA_Audio
AMP
AMP
AMP
AMP
AMP
AMP
AMP
AMP
SW
SW
SW
SW
SW
OMAP-L138
MCASP
(ACLKX)
Audio Codec
TLV320AIC29
IIS
R261
MIC0
A_OUT1
MICIN_HND
EXT_MIC2
AXR8/15
Figure 3-6 Diagram of Audio Section
Two MIC Inputs
The system has two MIC inputs from the external interface. The selected MIC will enter the
noise reduction IC for noise elimination to ensure optimal audio fed to the audio codec. The
two MIC inputs can be sampled at the same time and can be transmitted with an independent
slot respectively.
Summary of Contents for RDR9000
Page 1: ...RDR9000U V Service Manual ...
Page 45: ...Service Manual 6 UHF1 400 470 MHz Information 35 6 4 PCB View PCB View Main Board Top Layer ...
Page 46: ...Service Manual 6 UHF1 400 470 MHz Information 36 PCB View Main Board Bottom Layer ...
Page 48: ...Service Manual 6 UHF1 400 470 MHz Information 38 PCB View Rear Board Top Layer ...
Page 146: ...Service Manual 7 UHF3 350 400 MHz Information 136 7 4 PCB View PCB View Main Board Top Layer ...
Page 147: ...Service Manual 7 UHF3 350 400 MHz Information 137 PCB View Main Board Bottom Layer ...
Page 149: ...Service Manual 7 UHF3 350 400 MHz Information 139 PCB View Rear Board Top Layer ...
Page 248: ...Service Manual 8 VHF 136 174 MHz Information 238 8 4 PCB View PCB View Main Board Top Layer ...
Page 249: ...Service Manual 8 VHF 136 174 MHz Information 239 PCB View Main Board Bottom Layer ...
Page 251: ...Service Manual 8 VHF 136 174 MHz Information 241 PCB View Rear Board Top Layer ...
Page 346: ...Service Manual 11 Packing Guide 336 11 Packing Guide Figure 11 1Packing Guide ...
Page 352: ...342 ...