Panasonic SA-HT280 Service Manual page 71

SCHEMATIC DIAGRAM-5
B
SURROUND CIRCUIT
R1929
100
E
R1930
100
0V
65 CS42
D
R1935 100 4.9V
66
F
R1936 100 0V
67
D
R1937 100 0V
68
E
R1934 100 0V
69
H
R1931 100 0V
70
G
R1932 100 0V
71
F
R1933 100 0V
72
K
C1906 0.01
73
4.9V
74
R1938 100 0V
75
A
R1939 100 0V
76
B
0V
77
R1941 100 0V
78
C
0V
79
R1945 0V
80
100
C
R1942
100
B
R1943
100
I
4.9V
4.9V
10K 0V
47K
Q1901
RVTDTC114YST
RESET
Q1703
2SC1740SSTA
POWER SUPPLY
R1708 R1709
330
330
12.8V
6.2V
R1707
820
2.6V
:POSITIVE VOLTAGE LINE
:NEGATIVE VOLTAGE LINE
64 63 62 61 60 59 58 57 56 55 54 53 52 51 50
S CLK
S OUT
S IN
CS49
C CLK
CD IN
IC1901
SCD OUT
M38B57MCA232
AVss
SYSTEM CONTROL
VREF
VOLUME
REQS
POWER
REQ M
PDN
CS RESET
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
1 3
M L H G
2 CF1901
Q1902
2SA933SSTA
C1904 POWER SUPPLY
50V1
4.2V 4.9V
R1905
4.9V
270
5.5V
IC1701
PQ30RV11
REGULATOR
1 2 3 4
4.9V 2.6V 1.3V
R1715
3.9K
R1712
3.9K
C1705
50V1
D1706
RVD1SS133TA
4.9V
:FM/ AM SIGNAL LINE
:CENTER SP SIGNAL LINE
49 48 47 46 45 44 43 42 41
40
39
38
37
36
35
34
33
0V R1920
32
0V R1919
31
0V R1918
30
4.9V
MUTE A
29
-VP
28
0V RVD1SS133TA
DAT S
27
0V
CLK S
26
0V
STB S
25
R1917
1K
C1911
1000P
A J
M
R
S
H
T
V
U
Q1701 R1702
4.7
4.9V 8.1V
5.5V
Q1702
R1701
4.7
4.9V 8.1V
5.5V
Q1701
2SD2137PQTA
REGULATOR
Q1702
2SD2374PQAU
REGULATOR
4.9V
:SURROUND SP SIGNAL LINE
:SUB WOOFER SIGNAL LINE
1K
1K
1K
D1903
CN1201
L DVD L
1
DVD R To
2
Q
A.GND CIRCUIT
3
A.GND (CP1201)
4
A.GND
5 on SCHEMATIC
W S IN L
6 DIAGRAM-12
X S IN R
7
CN1202
VR PS
7
VR REF To
4.9V 6
ST SEL CIRCUIT
5
DT SEL (CP1202)
4
CK SEL
3 on SCHEMATIC
-B(1)
-16.2V 2 DIAGRAM-12
+B(1)
14.4V 1
CN1203
1 SW OUT
2 SL OUT To
3 SR OUT CIRCUIT
4 C OUT (CP1203)
5 L DOUT
on SCHEMATIC
6 A.GND
DIAGRAM-12
7 R DOUT
A
CN1204
CM RQS
7
B
CM RQM To
6
C
CM DO CIRCUIT
5
D
CM DI (CP1204)
4
E
CM CK
3 on SCHEMATIC
F
MUTE S
2 DIAGRAM-12
SD
1
C1215
0.1
W1205
1
GND
A
2
SW DSP
O
3
SW LPF IN
G
4
SW FMIX To
F
5
L DSP TERMINAL
E
6
R DSP
CIRCUIT
7
+B(9)
(CN1205) on
8
R DIN
SCHEMATIC
9
L DIN
DIAGRAM-1
10
V
DD
G
11
DT VR
CK VR
12
H
CN702
J
+B(4) To
9.2V 3
TORANSFORMER
N +B(4) CIRCUIT(W702)
2
on SCHEMATIC
GND
1 DIAGRAM-16
O
G
MAIN
G
MAIN
G
MAIN
G
MAIN
A
IN/OUT
POWER