Receiver & Speaker Trouble - LG KC780 Service Manual

5. TROUBLE SHOOTING
5.6 Receiver & Speaker trouble
Check Points
-Speaker/Receiver or components soldering
-Audio amp / Analog switch soldering
LGE Internal Use Only
SPK / RECEIVER
SPK_EAR_P
SPK_EAR_N
C101
VA100
47p
ICVL0505101V150FR
VAUX_2V9
VBAT
VIO_2V62
C205
4.7u
C218 C209
22u
1u
0.1u
C211
A6
A5
B2
F6
G6
R206
26M_TVOUT
F5
DNI
MCLK_ATI
G5
I2S_CLK
F4
I2S2_TX
F3
I2S_SDO
G4
I2S_WS
E4
I2S2_WA0
G2
G3
G1
C231 1u D3
FM_SND_L
C232 1u C5
SND_L
C233
1u C6
MIC_N
C234 1u
B6
MIC_P
C237 1u D5
HS_MIC_N
C238 1u E5
HS_MIC_P
C239 1u D4
FM_SND_R
C240 1u D6
SND_R
R214
F2
100K
F1
I2C_SCL
E3
I2C_SDA
E2
VBAT
C254 C255
0.1u 39p
U206
NLAS5223BMNR2G
1
2
SPK_P
3
SPK_EAR_P
4
SPK_SEL
5
EAR_P
R227
200K
TP3
CN100
L100
100nH
C100
27p L101
100nH
C102
VA101
47p
ICVL0505101V150FR
Stereo DAC & AMP Stereo DAC & AMP
C212
0.1u
U203 WM8990ECS_RV
B3
AVDD HPGND
A3
HPVDD AGND
E6
SPKVDD DGND
B1
DCVDD SPKGND
DBVDD
MCLK
C3
BCLK VMID
A2
ADCDAT MICBIAS
DACDAT
DACLRC
ADCLRC_GPIO1
D1
LOP
C2
GPIO3_BCLK2 LON
GPIO4_DACLRC2
GPIO5_DACDAT2
B4
LIN1 LOUT
B5
LIN2 ROUT
LIN3_GPI7
LIN4_RXN
A4
OUT3
C4
RIN3_GPI8 OUT4
TP1
RIN4_RXP
RIN1
A1
RIN2 SPKP
C1
SPKN
CSB_ADDR
C241
SCLK 47p
E1
SDIN ROP
D2
RON
MODE
TP2
10
VCC NO2 SPK_N
9
NO1 COM2 SPK_EAR_N
8
COM1 IN2 SPK_SEL
7
IN1 NC2 EAR_N
6
NC1 GND
- 82 - Copyright © 2008 LG Electronics. Inc. All right reserved.
1
2
C222
2.2u
VMIC
HSO_L
HSO_R
SPK_P
SPK_N
C242
47p
Only for training and service purposes