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3-5. AUDIO BLOCK DIAGRAM
MA-325 BOARD (4/5)
(SEE PAGE 4-11,4-19,4-21,4-25)
CN301
1
IC071
MONO
AUDIO HEAD
HEAD SW
2
2
T081, Q081
AUDIO
BIAS ERASE
4
ERASE HEAD
OSC
T091, Q091
CN302
FULL
BIAS ERASE
1
ERASE HEAD
OSC
IC340
AUDIO REC/PB AMP
Hi-Hi
CN502
AUDIO HEAD
PB
11
17
AMP
CH 1
18
VCC
24
CH 2
PB
13
20
AMP
REC CURRENT
12
16
AMP
IC901
BUFFER
CNJ901
L
5
7
LINE-1
AUDIO
IN
3
1
R
CN480
CNJ480
3
L
LINE-2
AUDIO
IN
1
R
IO-64 BOARD (2/2)
(SEE PAGE 4-32)
IC201
(2/2)
NORMAL AUDIO PROCESS
4
80
A-H SW
3
5
Q301
AUTO
BIAS
6
Q092
FULL ERASE
AF SWP
AF SWP
1
AF REC P
MUTE REC
4
AF REC
5
AF REC
3
37
AGC
AMP
9
36
AGC
DET
5
6
3
4
7
8
CN423
L2 (L) AUDIO
3
L2 (R) AUDIO
1
05
3-9
7
4
REC:EP
ALC
PB:EP
REC
3
1
REC
ALC
DET
PB
PB ON
PB
LINE
MUTE
AMP
10
11
PB
MUTE
CTL
IC360
Hi-Fi AUDIO PROCESS
LEVEL
DET
BPF
VCO
LPF
L ch
LPF
NR
BPF
VCO
LPF
R ch
LPF
NR
EVR
OUTPUT
INPUT
SELECT
SELECT
NORMAL
SELECT
2
1
21
44
71
73
75
79
78
77
70
A MUTE
FULL ERASE
FULL ERASE
AF REC P
AF REC P
AF REC
SERVO/SYSTEM
AF REC
(SEE PAGE 3-8)
AF SWP
39
AF ENV
AF SW P
40
AF SWP
41
DATA (IIC)
SDA
42
SCL
CLOCK (IIC)
CN901
CN951
LINE OUT L
1
1
LINE OUT R
3
3
RJ-79 BOARD
(SEE PAGE 4-25)
18
19
15
16
12
20
MOD AUDIO
TUNER
(SEE PAGE 3-11)
TUNER L
TUNER R
3-10
SLV-ED8/ED9
CNJ953
L
LINE-2
AUDIO
OUT
R
CNJ901
L
LINE-1
AUDIO
OUT
R
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