Panasonic SA-HT280 Service Manual page 89

AUDIO
PHONO
CD
TV IN
IN
VCR
OUT
REC
(OUT)
TAPE
PLAY
(IN)
VIDEO
TV IN
DVD IN
VCR IN
3
X2
(26)
AN6558F
IC451
2
(27)
X1
PHONO EQ
AMP
4
(25)
X3
5
(24)
6
X4
(23)
7
X5
(22)
8
X6
(21)
9
(20)
10
X7
(19)
11
X8
(18)
Level shift
A
Latch circuit
Shift register
SIGNAL SELECTOR
6
GND2
Q352
14
-B1 REGULATOR -V
1
3
2
12
13
D354
TC9163AN
IC401
SIGNAL SELECTOR
(AUDIO)
28
V +B1
DD
1
Vss -B1
NJM4580DD
IC402
12
(17)
Buffer
amp.
14
GND
13
15
16
NJM2279D
IC351
(VIDEO)
7
GND1
Q351
8
+V REGULATOR
5
4
10
11
D353
+B1
VCR OUT
MONITOR
OUT