Esquema De Circuito Del Filtro De Audio Y Salida De Audio - LG DV497H Manual De Servicio

5. ESQUEMA DE CIRCUITO DEL FILTRO DE AUDIO Y SALIDA DE AUDIO

AOUT_FL R70 3k
C77
220pF
GND
AOUT_FR R80 3k
C80
220pF
GND
AOUT_SR R116 3k
C120
220pF
GND
AOUT_SL R126 3k
C106
220pF
GND
AOUT_LFE R133 3k
C123
220pF
GND
AOUT_C
R140 3k
C112
220pF
GND
JUST FOR 6CH
R68 27K
C76 82pF
R71 GND
R72 1.2K 2
EC23 10uF/16V R73 470 L CH
1
7.5K C78 V_REF
3
U4A
1500pF NJM4558 R74 R75 470 Q21
10K
3904
C130
GND
0.1uF
AVCC12 GND
GND
GND
R78 27K
C79 82pF MUTE
R81 GND
R82 1.2K 6
EC26 10uF/16V R83 470 R CH
7
7.5K C81 V_REF 5
U4B
1500pF NJM4558 R86 470 Q24
R85
10K 3904
GND AVCC12
GND
GND
R148 27K
C105 82pF
R117 GND
7.5K R118 1.2K
2
EC34 10uF/16V R123 470 SR
1
V_REF
C117 3
U8A
1500pF NJM4558 R122 R125 470 Q29
10K
3904
C129
GND
0.1uF
GND
AVCC12 GND
GND
R129 27K
C122 82pF MUTE
R127 GND
R128 1.2K
6
EC31 10uF/16V R131 470 SL
7
7.5K C107 V_REF 5
U8B
1500pF NJM4558 R132 470 Q30
R130
10K 3904
GND AVCC12
GND
GND
R136 27K
C111 82pF
R134 GND
R135 1.2K
2
1 EC32 10uF/16V R138 470 LFE
7.5K C110 V_REF 3
U9A
1500pF NJM4558 R137 R139 470 Q31
10K
3904
C128
GND
0.1uF
GND
AVCC12 GND
GND
R143 27K
C114 82pF MUTE
R141 GND
R142 1.2K 6
7 EC33 10uF/16V R145 470 CENTER
7.5K C113 V_REF
5
U9B
1500pF NJM4558 R146 470 Q32
R144
10K 3904
GND AVCC12
GND
GND
M5V
mute circuit
(
VVCC3
R79
R167
4.7K
4.7K/NC
R84 Q23
3 AUDIO_MUTE
BT3904
4.7K
R87
(
R77
22K 3.3K
GND
+12V AVCC12 V_REF
R89 100 R88 36K
EC28 C84 R90
0.1uF
10k
100uF/25V
GND
GND
SPDIF_OUT R91 200 C87 0.1uF COAXIAL
L CH
R92 C88 R CH
100
10pF R162 22
P+5V
SPDIF_OUT R163 33
C85 C86
EC30
1000pF 1000pF 47uF/16V
GND
GND
JUST FOR 6CH
SL
SR
CENTER
LFE
C124
1000pF
3-31 3-32
Q20
?
3906
R69
22K
R76
Q22 MUTE
10K
EC24 3906
+
?
220uF/16V
GND
EC27
C82 C131
C83
100uF/16V 0.1uF 0.1uF 0.1uF
AOUT_FR
AOUT_FR
AOUT_FL
AOUT_FL
AOUT_SR
AOUT_SR
AOUT_SL
AOUT_SL
AOUT_C
AOUT_C
AOUT_LFE
AOUT_LFE
SPDIF_OUT
SPDIF_OUT 3
P3
RCA/AUDIO OUT
1
2
3
4
5
6
7
8
OPTICAL
9
C132 C121
0.1uF NC
GND
P1
1
2
3
4
5
6
C125 C126 C127
RCA/AUDIO OUT
1000pF 1000pF 1000pF
3
3
3
3
3
3