LG 43LX310C Service Manual page 33

External Speaker
EXT SPK AMP
+3.5V_ST
EXT_SPK
R3402
47K
EXT_SPK_DET
HEAD_PHONE
C
R3400
Q3400
47K
B
HP_DET MMBT3904(NXP)
P
HEAD_PHONE
E
EXT_SPK
R3401
1K
AMP_RESET
SIDE_HP_MUTE
EXT_SPK
HP_EXT_SPK_LOUT
EXT_SPK
HP_EXT_SPK_ROUT
Close to AMP IC
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
Copyright 2015 LG Electronics Inc. All rights reserved.
Only for training and service purposes
A13.2V
EXT_SPK
L3400
UBW2012-121F
EXT_SPK
C3405
0.1uF
50V
Close to Pin3
EXT_AMP_14Y
IC3400
TPA3124D2PWPR
PVCCL_1 PGNDL_2
1 24
SD PGNDL_1
2 23
PVCCL_2 LOUT
3 22
EXT_SPK
R3403
MUTE BSL
10K
4 21
LIN AVCC_2
C3401
5 20
1uF
10V
RIN AVCC_1
C3402
6 19
1uF
10V
BYPASS GAIN0
7 18
AGND_1 GAIN1
8 17
AGND_2 BSR
9 16
PVCCR_1 ROUT
10 15
VCLAMP PGNDR_2
11 14
PVCCR_2 PGNDR_1
12 13
C3400 C3403 C3404
1uF 1uF 0.1uF
50V 50V 50V
EXT_SPK EXT_SPK EXT_SPK Close to Pin10
EXT_SPK EXT_SPK
C3408 C3410
0.1uF 10uF
50V 35V
Close to Pin1
Close to AMP IC
EXT_SPK
EXT_SPK
L3401 OPT
C3411
C3413
22.0uH R3408
0.47uF
4.7K 0.47uF
50V
EXT_SPK
50V
C3407
0.22uF
50V
EXT_SPK
OPT
EXT_SPK
R3409 C3412 C3414
0.47uF
22.0uH 4.7K 0.47uF
50V
EXT_SPK
L3402 50V
EXT_SPK
R3404
10K
R3406
OPT 10K GAIN1 GAIN0 AMP GAIN
EXT_SPK
0 0 20dB
0 1 26dB
1 0 32dB
R3413
R3407
10K 1 1 36dB
10K
C3406 EXT_SPK
OPT
0.22uF
50V
EXT_SPK
C3409
0.1uF
50V
EXT_SPK
Close to Pin19,20
EXT_AMP_15Y_CI
IC3400-*1
PAM8124
PVCCL_1 PGNDL_2
1 24
SD PGNDL_1
2 23
PVCCL_2 LOUT
3 22
MUTE BSL
4 21
LIN AVCC_2
5 20
RIN AVCC_1
6 19
BYPASS GAIN0
7 18
AGND_1 GAIN1
8 17
AGND_2 BSR
9 16
PVCCR_1 ROUT
10 15
VCLAMP PGNDR_2
11 14
PVCCR_2 PGNDR_1
12 13
C3415
47uF
25V
EXT_OUT_L
EXT_SPK
EXT_SPK
10K
R3410
C3416
47uF
25V
EXT_OUT_R
EXT_SPK
EXT_SPK
10K
R3411
EXT SPK Jack
EXT_SPK
JK3400
PEJ034-01
E_SPRING
3
R_SPRING
4
T_SPRING
5
B_TERMINAL2
7B
T_TERMINAL2
6B
EXT_OUT_R
EXT_OUT_L
EXT_SPK_DET
OPT
VA3400
5.6V
LGE Internal Use Only