LG U990 Service Manual page 70

3.10.7.2 Audio Mode
There are three audio modes (Voice call, speaker phone, MIDI/MP3).
MODE
Voice Call
Speaker phone
MIDI
MP3
Audio & Sound Main Component
There are 8 main components in KU990.
Component
1 MSM6280
2 Audio Codec
3 Analog Switch
4 Speaker
5 Receiver
6 Main MIC
7 CAM MIC
8 Ear MIC
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Only for training and service purposes
Device Description
Receiver Mode Receiver Voice Call
Loud Mode Speaker Phone
Headset Headset Voice Call
Loud Mode Speaker Phone
Loud Mode Speaker MIDI Bell
Headset Headset MIDI Bell
Loud Mode Speaker MP3
Headset Headset MP3
Table. Audio Mode
Maker Part No.
MSM6280
WM8983
NC7SB3157L6X
EMS1634APB1
EMR0906SP
SPM0204HE5-PB
SPOB-413S42-
RC3310BC
HC-MQD-LG059
Table. Audio main component list
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3. TECHNICAL BRIEF
Note
Base-Band Modem
ADC/DAC, AB class SPK AMP
Analog Switch for MIC BIAS
8 ohm Speaker
32 ohm receiver
-42 dB microphone
-42 dB microphone
Ear MIC
LGE Internal Use Only