LG 42LY750H Service Manual page 45

EXT_SPEAKER_AMP
MAIN_AMP_RESET
R8600
100
R8601
10K
B
EXT_SPK_MUTE
OPT
EXT_SPK_LOUT_MAIN
EXT_SPK_ROUT_MAIN
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 © 2014 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
+24V_AMP
L8600
BLM18PG121SN1D L8604
BLM18PG121SN1D
C8609
C8606 0.1uF
50V
0.1uF
R8603 50V
100
IC8600
TPA3124D2PWPR
+3.5V_ST
PVCCL_1 PGNDL_2
R8602 1 24
10K
SD PGNDL_1
2 23
C L8602
22.0uH
PVCCL_2 LOUT
Q8600
3 22
MMBT3904(NXP)
C8607
OPT
E 0.22uF
MUTE BSL
4 21 50V
C8600 L8603
1uF
22.0uH
10V LIN AVCC_2
5 20
RIN AVCC_1
6 19
C8601
1uF
BYPASS GAIN0
10V 7 18
C8602 AGND_1 GAIN1
1uF 8 17
50V
AGND_2 BSR
9 16
C8608
0.22uF
PVCCR_1 ROUT 50V
10 15
VCLAMP PGNDR_2
11 14
C8603
PVCCR_2 PGNDR_1
1uF 12 13
50V
C8604 C8605
4.7uF 0.1uF
50V 50V
C8610
4.7uF
50V
C8616
100uF
25V
EXT_OUT_L
C8612 C8614
R8608
1uF 0.47uF
4.7K
50V 50V
C8613 C8615
R8609 C8617
1uF 0.47uF
4.7K 100uF
50V 50V
25V
EXT_OUT_R
R8604
10K
R8606
OPT
10K
OPT
R8605 R8607
10K
10K
EXT_SPK OUT(Single End)
JK8600
PEJ034-01
E_SPRING
3
EXT_OUT_R
OPT
R8611
C8618
470K
100pF
50V OPT
R_SPRING
4
T_SPRING
5
EXT_OUT_L
+3.3V_NORMAL OPT
B_TERMINAL2
7B R8614
C8619
470K
100pF
OPT
T_TERMINAL2 50V
6B
R8612
15K
EXT_SPK_DET
C8672
1uF
10V
EXT_SPK_DET
Connected Disconnected
High
Low
xxLY750H-ZA 2013.12.27
EXT_SPK 86
LGE Internal Use Only