LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TECHNICAL BRIEF
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Figure . Audio part schematics
EUSY0303901
HEADPHONE AMP
R420
15K
C451
1u
R413
15K
R415
68
R417
68
GRM36X5R223K16PT
22n
C455
600
FB405
C458
220n
1u
C452
C450
4.7u
_SHDN
4
2
C1P
INL+
15
INL_
14
7
INR+
INR_
8
OUTL
12
OUTR
10
3
PGND
PVDD
1
5
PVSS
P_G
17
SGND
6
13
SVDD1
9
SVDD2
11
SVSS
16
U404
MAX9722BETE
C1N
GRM36X5R223K16PT
22n
C454
220n
C444
1u
C457
FB404
600
MIDI_3.3V
HP_AMP_EN
HP_EAR_L
HP_EAR_R
MIDI_EAR_L
MIDI_EAR_R