LG 55LV355C-UA Service Manual page 44

EXT_SPEAKER OUT
+3.5V_ST
IC1900
NL17SZ08DFT2G
004:AN28;005:Z8;016:T13 R1900
10K
1 5
POWER_DET
R1901
10K
2
POWER_ON/OFF1
3 4
+3.5V_ST
R10076 R1970
005:AL16;019:AL18
0 100
SUB_MUTE
R10077
0
SPK_OUT_MUTE
C
OPT
1K
B Q1970
MMBT3904(NXP)
R1971
OPT E
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
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+24V
BLM18PG121SN1D
L1980
C1900
0 . 1 u F
C1905
22uF C1909
0 . 1 u F
35V
50V
R1903
10K
R1904
10K
IC1901
TPA3124D2PWPR
PVCCL_1
1
OPT
R10079
0 SD
2
EXT_AMP_SD
R10078
PVCCL_2
0 3
AMP_RESET
MUTE
4
C1906
002:U7
1uF LIN
5
EXT_SPK_L
C1907
002:U7
1uF RIN
6
EXT_SPK_R
BYPASS
7
AGND_1
8
AGND_2
9
PVCCR_1
C1902 10
1uF
50V
VCLAMP
11
PVCCR_2
C1903
12
1uF
50V
C1908
0 . 1 u F
50V
C10063 C10064
0 . 1 u F 10uF
50V 35V
PGNDL_2 C1919
24
47uF
25V
PGNDL_1
23
L10055 R1909 C1915 C1917 10K
R1912
22.0uH 4.7K 2 . 2 u F 2 . 2 u F
LOUT
22 50V 50V
C1911
0 . 2 2 u F
BSL
L10056
21 25V
22.0uH
C1916 C1918
R1910
2 . 2 u F 2 . 2 u F
4.7K
AVCC_2
50V 50V
20
AVCC_1
19
C1920
OPT 47uF 10K
R1905 25V R1911
OPT
10K
GAIN0
R1907
18
10K
GAIN1
17
R1906 R1908
BSR
10K 10K
16
C1910
0 . 2 2 u F
ROUT
25V
15
PGNDR_2
14
PGNDR_1
13
C1912
C1913 C1914
0 . 1 u F 22uF 10uF
50V 35V 35V
EXT_SPEAKER
JK1990
PEJ027-01
E_SPRING
3
T_TERMINAL1
6A
B_TERMINAL1
7A
R_SPRING
4
T_SPRING
5
B_TERMINAL2
7B
T_TERMINAL2
6B
EXT_OUT_L
EXT_OUT_R EXT_SPEAKER_MUTE
EXT_OUT_L
Q1980
2SC3052
RT1P141C-T112
R1980 Q1982
2K
EXT_OUT_R 3
2
Q1981
2SC3052
R1981
2K
GP2R
PCMCI
+3.3V_Normal
R1990
100K
R1991 100
EXT_SPK_DET
EXT_OUT_R
EXT_OUT_L
C1990 C1991
1uF 1uF
OPT
OPT
+3.5V_ST
R1982
10K
005:AL16;019:E22
SUB_MUTE
1
C1980
0 . 1 u F
20101023
20
LGE In t e r n a l Us e On l y