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AUDIO
D-Class DUO Speaker AMP
L501
1
2
2.2u
VBATT
C501
C502
10u
B4
A3
A2
A1
10u
C506
47n
D3
HPH_R
IN-
C505
47n
FB501
60
D2
IN+
OUT+
B1
U501
C509
0
FB503
60
B2
GAIN
OUT-
C1
B3
AGC
C510
DNI
D4
ENB
SPK_AMP_R_EN
C3
END
C513
C514
33p
33p
A4
C2
C4
D1
VBATT
C517
2.2u
A2
HPVDD
B3
C519
1u
HPH_L
A4
INL-
GND
B1
C518
1u
B4
INL+
A3
EAR_L
OUTL
HPH_R
C521
1u
D4
D3
EAR_R
INR-
U503
OUTR
C520
1u
C4
INR+
D2
B2
C522
GAIN
CPP
C523
+1V8_VIO_MTK
D1
C1
HI-Z
CPN
1u
2.2u
C3
A1
C2
Headset_AMP_EN
C524
1u
2
R502
2
3.5pi Ear Jack Connector
R506
1
2
HOOK_DETECT
10K
EARMIC_BIAS
HS_JACK_DET
R509
EARMIC_N
2.2K
EAR_L
C529
EAR_R
DNI
L503
100n
FM_ANT
EARMIC_P
C530
C531
33p
33p
MAIN GND
LGE Internal Use Only
L502
1
2
2.2u
VBATT
C503
10u
C504
B4
A3
A2
A1
10u
C508
47n
SPK_RP
D3
HPH_L
IN-
C507
47n
D2
B1
FB502
60
IN+
OUT+
SPK_RN
U502
0
C511
B2
GAIN
OUT-
C1
FB504
60
B3
AGC
C512
DNI
D4
ENB
C3
SPK_AMP_L_EN
END
C515
C516
33p
33p
A4
C2
C4
D1
Cutoff Freq. 320Hz, 15.5dB Gain
+1V8_VIO_MTK
HS_JACK_DET
STATE
R516
HIGH(DEFAULT)
UNMATING
1
2
LOW
MATING
47K
J501
S/W_Detect
FB508
1800
R511
10
FB509
1800
SPK_L
R512
10
FB510
1800
SPK_R
GND
MIC
FB511
1800
2
2
2
C533
C534
1
47p
47p
L504
1
1
100n
R513
DNI
2
1
1
2
1
1
2
Close to 3.5pi ear-jack
R515
0
FM_RX_IN_N
R514
0
HP_AMP_SGND
SPK_LP
SPK_LN
Receiver
CN501
FB505
600
Contact Type
RCV_P
1
FB506
600
2
RCV_N
RevB 1800 -> 600
1
1
33p
33p
2
2
C527
C528
- 156 -
6. CIRCUIT DIAGRAM
Sub Mic
changed to BSE
MIC501
1
VMIC
P
2
G1
3
MIC2_N
FB507
C535
G2
4
MIC2_P
O
1800
1u
C525
C526
1
33p
33p
VA501
R517
2
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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Troubleshooting
