LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
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U404
R413
C444
C458
R420
FB404
FB405
R415
R417
EUSY0303901
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
Schematic of voice path
U404
FB404
FB405
R417
R415
C444
R413
R420
C458