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Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
5.6 Receiver & Speaker trouble
Check Points
-Speaker pin contact
-Audio amp soldering
-SUB PMIC soldering
5. Trouble shooting
- 76 -
AUDIO AMP SUB SYSTEM & SIGNAL DISTRIBUTOR
C302
1u
C312 1u
0R313
OUT+
B5
OUT-
C4
PGND
C5
PVDD
RXIN+
D4
B4
RXIN-
SCL
C3
SDA
B3
B1
VDD
A3
VSS
B2
BIAS
C1N
A4
C1P
A5
D3
GND
HPL
A2
HPR
A1
INA1
D2
INA2
D1
C2
INB1
C1
INB2
D5
C309
MAX9877AEWP_TG45
U303
1u
C305 1u
C308 1u
VBAT
0R314
C304 1u
C301
1u
1u
C315
0R300
C311 1u
HSO_L
HSO_R
BB_SND_L
BB_SND_R
I2C_SCL
SPK_N
SPK_P
i2C_SDA
FM_SND_R
FM_SND_L
SPK
1
2
CN501
C544
47p
100nH
L501
100nH
L500
EVLC18S02015
VA501
VA500
EVLC18S02015
C542
100p
C545
47p
SPK_N
SPK_P
MAIN RECEIVER
+
-
0R100
C102
47p47p
C101
OUT100
R102 0
OUT101
RCV_P
RCV_N
TP1
TP3
TP5
TP6
TP4
TP2