LG GX500 - Receiver & Speaker Trouble

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4. TROUBLE SHOOTING
GX500 Operational Description Revision A
LG Electronics 84/143 LGE Property
4.6 Receiver & Speaker trouble
Check Points
-Speaker contact
-Audio amp soldering
U701
C705 C706
L704L703
Figure 4-14. Audio Amp Circuit
Figure 4-16. Audio Amp
C712
0.1u
VBAT
C702
0.1uF
10u
C701
C704
2.2uF
1uC705
1uC706
1
07L
Hu1.0
207L
H
u
1.0
C708
0.1uF
C709
2.2uF
U701
LM49151TL
4E
4D 3D
4C 2A
E2B3
B2
A1
C3
E3
C2
D2C1
A3D1
A4E1
4B
1B
DDV D
D
V
S
L
INM+ LSOUT+
INM- LSOUT-
INL SET
INR
HPL
BYPASS
I2CVDD
SDA
SCL HPR
DNG
SSVPC
N
1
C
P1C
DN
GP
C
27pF
C710C711
27pF
FB701
2V62_VIO
2.2u
C713
smh
oK0
0
1
20
7
R
220nC703
220nC707
SPK_N
SPK_P
RCV_N
RCV_P
HSO_L
HSO_RI2C1_SCL
I2C1_SDA
AMP_IN_L
A
MP_IN_R
AUDIO AMP SUB SYSTEM
CN701
2
1
C715
47pF
47pF
C716
C717
100pF
VA701
L703 47n
VA702
L704 47n
SPK_N
SPK_P
SPK
GX500 Operational Description Revision A
LG Electronics 84/143 LGE Property
4.6 Receiver & Speaker trouble
Check Points
-Speaker contact
-Audio amp soldering
U701
C705 C706
L704L703
Figure 4-14. Audio Amp Circuit
Figure 4-16. Audio Amp
GX500 Operational Description Revision A
LG Electronics 84/143 LGE Property
4.6 Receiver & Speaker trouble
Check Points
-Speaker contact
-Audio amp soldering
U701
C705 C706
L704L703
Figure 4-14. Audio Amp Circuit
Figure 4-16. Audio Amp