LG 32LY560M Service Manual page 34

EXT_SPEAKER_AMP
+3.5V_ST
4.7K
R1802
R1803
SUB_MUTE
MMBT3904(NXP)
EXT_AMP_L
220K
330pF R1800
C1801
EXT_AMP_R
330pF 220K
C1800 R1801
CLOSE TO MSTAR
External Amp Switching
+24V
Ext_SPK_Switch
C1820
0.1uF
50V
Ext_SPK_Switch
R1816
10K
EXT_SPK_DET
Ext_SPK_Switch
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 right reserved.
Only for training and service purposes
+24V External_SPK_VCC
+3.5V_ST
4.7K
R1804
C1807
0.1uF
50V
10K
C
B
Q1800
IC1800
E
TPA3124D2PWPR
PVCCL_1 PGNDL_2
1 24
R1805
10K
SD PGNDL_1
2 23
R1806
10K
PVCCL_2 LOUT
3 22
C1808
0.22uF
MUTE BSL
R1807 50V
4 21
C1802
10K
1uF
OPT
10V LIN AVCC_2
5 20
C1803
1uF
10V RIN AVCC_1
6 19
BYPASS GAIN0
7 18
AGND_1 GAIN1
8 17
AGND_2 BSR
9 16
C1809
0.22uF
PVCCR_1 ROUT
50V
10 15
C1804
1uF
50V
VCLAMP PGNDR_2
11 14
C1805
PVCCR_2 PGNDR_1
1uF 12 13
50V
C1806
0.1uF
50V
Ext_SPK_Switch_NEW
D
Q1802-*1
G
AO3407B
S
External_SPK_VCC
Ext_SPK_Switch Ext_SPK_Switch
C1821 R1818
2.2uF 22K
50V
Ext_SPK_Switch_old
S
G
Ext_SPK_Switch
Ext_SPK_Switch
R1817 L1803 3.3uH
Q1802
27K
D
AO3407A CPI2520NHL3R3ME 2520
C
B MMBT3904(NXP)
Ext_SPK_Switch
Q1801
C1823 C1824 C1825
0.01uF 3.3uF 0.01uF
E
50V 50V 50V
Ext_SPK_Switch Ext_SPK_Switch
C1810
C1811
0.1uF
4.7uF
50V 50V
EXT_OUT_L
L1801
C1812 C1814
R1812
22.0uH
10K
0.47uF 0.47uF
4.7K
R1823
25V 25V
C1813 C1815
R1813
0.47uF 0.47uF
4.7K
22.0uH 25V 25V
L1802
EXT_OUT_R
10K
R1824
R1808
10K
R1810
OPT
10K
R1809
R1811
10K
10K
Pillow PWM AMP
+5V_Normal
10K
R1819
PILLOW_MUTE_INV
018:AB11
022:AF17
B
PILLOW_MUTE
Q1803
2SC3052
Pillow_SPK_Lineout
+3.5V_ST
R1825
15K
EXT_SPK_NON_CI
100 R1814
EXT_SPK_DET
C1818
10V
EXT_SPK_CI
1uF
R1814-*1
0
EXT_OUT_L
1/16W
5%
EXT_OUT_R
C1819 C1822 10V
1uF 1uF
OPT 10V
OPT
+24V
10K
C1832
R1821
0.1uF
50V
IC1801
C
TPA3124D2PWPR
4.7K
B
R1820
Q1804
C 018:X12 4.7K
E
2SC3052 PVCCL_1 PGNDL_2
PILLOW_MUTE_INV
1 24
R1827
SD PGNDL_1
E 2 23
PVCCL_2 LOUT
3 22
R1822
MUTE BSL
0
4 21
C1829
002:N8 0.1uF LIN AVCC_2
5 20
C1830
0.1uF 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
C1826 C1831
C1827 C1828
0.1uF
1uF 1uF 10uF
50V
25V 25V 35V
6B
T_TERMINAL2
7B
B_TERMINAL2
5
T_SPRING
4
R_SPRING
3
E_SPRING
PEJ034-01
JK1800
Gain 1 Gain 0
(dB)
0 0
20
1
0 26
1 0
32
1 1
36
C1835
C1837
0.1uF
10uF
50V
35V
PILLOW_OUT
L1807 R1830
C1841
C1839
22.0uH 4.7K
0.47uF 0.47uF
25V 25V
L1808
22.0uH
C1842
C1840
R1831
0.47uF 0.47uF
4.7K
25V
25V
C1843
200
22uF
25V R1834
C1834
0.22uF
25V
R1828
OPT
10K
R1832
10K
OPT
R1829 R1833
10K 10K
C1833
0.22uF
25V
C1836
C1838
0.1uF 10uF
50V 35V
XXLY570H-UA 2013/10/22
Ext Speaker Block 13
LGE Internal Use Only