Block Diagram - Panasonic Su-373 Service Manual

BLOCK DIAGRAM
MAIN IN
OUT
EOIJAL ZER AMp
RIAA
IC201
p H ONO
TUNER
25 1
(4)
CD/AUX
23
TAPE2 / EXT
22
PLAY BACK O—
21
(8)
REC ot-JT
TAPE I
PLAYBACK
shift
IC 201 Leve I
INPUT SELECTOR
Latch circuit
pHONO ON — — ON
Shift regist
TUNER — ON — ON
CD/AUX — ON ON
TAPE — ON — ON
TAPE 2 — — ON ON
) indicates pin NO. of right channel.
0251
Switching
/ remote
0282 0251
REMOTE CONTROL
TUNER
DEC K
0252
IC202
ATTENUATOR
VOLUME CONTROL)
-10 dB
-70 dB
•O
Sift
regist
O dB
-2 dB
0202
0203
13
020'
16
INPUT SELECTOR 'NO
b
a c
1
b
o c
0253
13 12 31 26 27 28 29
O 5
36 37 4? 40
s 10
AUX ) (TUNER) (PHONO)
(TAPE2) (TAPE l)
(LOUDENESS)
s.
ltVOL
(VOL (BAL (BAL.
UP) R chi
KEY MATRIX
0257
0255
1 C301
Muting
TONE AMP
control
Treble
Bo ss
0252
Switching
/ power
0731
20 32
'C 203
MICRO -COMPUTER
18 '9 22 23 24
Z2Sl
0
0
o o
VOLUME 'BALANCE INO
TC601
METER AMP
omporator
6
7
LED power
level meter
0601,603,605,607,609
I c 50
POWER AMP
S14
(REMOTE)
12
Bias
13
OFF
ON
Short
det.
Mute
det.
DC det
ON
18
RLY551
0551
OFF
Relay
drive
0 704
T 701
RECT.
st5
( POWER)
0721, 0722 0721
Regulator
PL 701
HEADPHONES
REMOTE
SPEAKERS
MAIN
AC 120V
60 HZ
(UNSWITCHED)
AC OUTLET
( UNSWI TCHEO)