Norcent LT2790BK, Руководство по обслуживанию

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27’’ LCD TV Norcent LT2790BK
50
9.3 Audio Board
LIN
LOUT_N
C49 NC
R36
R25
100 1/10W
R24 0 1/3W
D3
M
LL4
148
C39
0.47uF
36
SPK_R+
TPA3100D2
ROUT+
C27
1uF
L10 NC/600 OHM
1 2
R31
0 1/10W
VREG
LOUT-
Q5
2SC2412KR
C30
1uF
CN6
CONN
1
2
3
4
R38
VREG
C25 1uF
Close to IC
+20V
GAIN0
SHUTDOWN
U2
NJM2199M
1
2
3
4
5
6
7
14
13
12
11
10
9
8
FIL1
FIL2
FIL3
VOL2
VOL1
Vref IN
Vref
LIN
RIN
LOUT
ROUT
MODE
GND
V+
0
PGND
L ( 0V~0.8V )
R35
1.2K 1/10W
D4
MLL4148
D2
MLL4148
3k Ohm
R3
NC
AGND
ROUT_N
1
PGND
H ( 2V ~ VDD )
C12 1uF
GAIN0
L5 NC/600 OHM
1 2
L2
22uH
0
RO
UT
+
C2
0.001uF
1k Ohm
RIN
D12V
C48 NC
0
LOU
T
-
R8
1M
1
/10W
MUTE
+
C51
10uF/25V
1k Ohm
+
C4
4
100
uF
/35V
SIGNAL & CONTROL INPUT
T2091-C-X-X-1-060906 C
PAGE 01 AUDIO POWER AMP.
Custom
1 2 Tuesday , September 05, 2006
Title
Size Document Number Rev
Date: Sheet of
+
C52
10uF/25V
R35
R23 0 1/3W
ROUT
D
12V
A
R21 0 1/3W
GAIN0
1
LOUT+
+ C16 10uF/25V
L1 NC/600 OHM
1 2
U1
TPA3100D2PHPR
1
2
3
4
5
6
7
8
9
10
11
12
13 14 15 16 17 18 19 20 21 22 23 24
25
26
27
28
29
30
31
32
33
34
35
36
37 38 39 40 41 42 43 44 45 46 47 48
GND
RINN
RINP
AGND
LINP
LINN
GAIN0
GAIN0
GAIN1
MSTR/SLV
SYNC
GND
GN
D
RO
S
C
VR
E
G
VB
YP
AG
N
D
BS
L
P
LOU
T
P
LOU
T
P
LOU
T
N
LOU
T
N
BS
L
N
GN
D
GND
PVCCL
PVCCL
PGNDL
PGNDL
VCLAMPL
VCLAMPR
PGNDR
PGNDR
PVCCR
PVCCR
GND
GN
D
BS
R
N
RO
UT
N
RO
UT
N
RO
UT
P
RO
UT
P
BS
R
P
S
HUT
DO
WN
MU
T
E
FA
U
LT
AV
C
C
AV
C
C
R28
10K 1/10W
R37
SRS_H
H ( 2V~VDD )
TPA3100D2
MUTE
L13 NC/600 OHM
1 2
LOUT
R12
10K 1/10W
C14 4.7uF
20
1
ACTIVE
C22 4.7uF
C13 0.01uF
+
C26
220uF/35V
NC
CN7
CONN
1
2
3
4
5
6
L ( 0V~0.8V )
L6 NC/600 OHM
1 2
SRS_H
C
36
1uF
+20V
R5
1K 1/10W
26
TPA3100D2
R1
6
47K
1/
10
W
C3
0.47uF
C9
1uF
0
ACTIVE
3k Ohm
GAIN1
R37
1.2K 1/10W
R2
NC
C10 0.033uF
FAULT
+20V
R10 NC
L12 NC/600 OHM
1 2
AGND
VREG
D1
RLZ6.8B
1
2
L8 NC/600 OHM
1 2
1
C8 0.
22uF
U3
NC/NJM2761RB2
1
2
3
4
5
6
7
8
9
10
V+
OUTa
INa
INT
VREF SENSE
SW
INb
OUTb
GND
C
45
1uF
AGND
FAULT
0
LOUT_N
RIN
C31
10uF/16V
C37
0.1uF
L4
22uH
C50 NC
MUTE
SHUTDOWN
R22 0 1/3W
R1
8
22
K
1/
1
0W
PGND
Q1
2SC2412KR
+20V
R14
33K 1/10W
C38
0.001uF
R6
10K 1/10W
PGND
L ( 0V~0.8V )
LIN LOUT
ACTIVE
R1
9
N
C
R33 NC/0
R1
10K 1/10W
C6
0.
22uF
+
C15
220uF/35V
C46 NC
H ( 2V~VDD )
C20 0.33uF
GAIN ( dB )
C19 4.7uF
C4
0.001uF
RO
UT
-
Q2
NC
+20V
ROUT
SPK_L+
8 Ohm speak
R9
4
7K
1/
10W
R4
10K
1/
10W
R7
0
1
/10W
R26
NC/0
L9
22uH
L11
22uH
C5
0.1uF
R3
0
10
K
1/
1
0W
LIN
ROUT
C3
4
0.
22uF
LOU
T
+
C4
2
4.7
uF
D12V
C40
0.001uF
CN3
CONN
1
2
+20V
R2
0
N
C
R36
3.3K 1/10W
L3 NC/600 OHM
1 2
PGND
LOUT
RIN
R1
7
100K
1/
10
W
R34 NC
NC
C3
5
0.0
1
uF
R1
5
47K
1/
10
W
16 Ohm speak
R38
3.3K 1/10W
ROUT-
SHUTDOWN
GAIN1
C23 1uF
C7
4.
7
uF
+ C18 10uF/25V
C3
2
0.
1
uF
FAULT
L7
100uH +-20%
C1
0.1uF
CN1
CONN
1
2
3
AGND
R13 10K 1/10W
C4
3
N
C
SPK_L-
SPK_R-
C28 1uF
R32
0 1/10W
AUDIO POWER SUPPLY INPUT
0
C47 NC
C17 0.47uF
+
C29
100uF/25V
C11 4.7uF
+20V
GAIN1
ROUT_N
MUTE_H
Q3
NC
R11 NC
D12VA
PGND
32
PGND
SHUTDOWN
C41
0.1uF
R2
9
3.
3
K
1/
10W
C3
3
0.
22uF