Receiver & Speaker Trouble - LG GX500 Service Manual

4. TROUBLE SHOOTING
GX500 Operational Description
GX500 Operational Description
GX500 Operational Description
4.6 Receiver & Speaker trouble
4.6 Receiver & Speaker trouble
Check Points
4.6 Receiver & Speaker trouble
Check Points
-Speaker contact
Check Points
-Audio amp soldering
-Speaker contact
-Audio amp soldering
-Speaker contact
-Audio amp soldering
RCV_P
RCV_N
AMP_IN_L
AMP_IN_R
I2C1_SDA
I2C1_SCL
Figure 4-14. Audio Amp Circuit
Figure 4-14. Audio Amp Circuit
Figure 4-14. Audio Amp Circuit
SPK
47pF
C716
SPK_P
C717
100pF
SPK_N
C715
47pF
LG Electronics
LGE Internal Use Only
LG Electronics
LG Electronics
AUDIO AMP SUB SYSTEM
2V62_VIO
C705 1u
C706 1u
E1
INM+
D1
INM-
C703 220n
C1
INL
C707 220n
C2
INR
C3
BYPASS
A1
I2CVDD
B2
SDA
B3
SCL
C708
0.1uF
C713
2.2u
L704 47n
2
L703 47n
1
CN701
VA701 VA702
L703
L703
L703
U701
U701
U701
Figure 4-16. Audio Amp
Figure 4-16. Audio Amp
84/143
Figure 4-16. Audio Amp
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84/143
84/143
VBAT
FB701
C701
C712
10u
0.1u
A4
LSOUT+
A3
LSOUT-
D2
SET
U701
LM49151TL
E3
HPL
E2
HPR
C711
0.1uF 27pF
C702
C704 C709
2.2uF 2.2uF
L704
L704
L704
C706
C706
C706
Copyright © 2010 LG Electronics. Inc. All right reserved.
Revision A
Revision A
Revision A
SPK_P
SPK_N
HSO_L
HSO_R
C710
27pF
C705
C705
LGE Property
C705
Only for training and service purposes
LGE Property
LGE Property