LG KS20 Operating Instructions Manual page 68

3. TECHNICAL BRIEF
Voice Call Receiver Mode Path
MSM7200
(U100-1)
Voice Call Receiver Mode is routed as below
MSM7200 EAR1ON,EAR1OP -> Analog Switch( U400) -> Receiver
LGE Internal Use Only
Headset
AMP
(U402)
AMP
(U401)
Voice
Voice + MP3 + MIDI
- 70 -
Head_Set
Analog
switch
(U400)
Receiver and
Loud Speaker
MIC
Head_set MIC
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