P
Q
S
R
T
2
1
3
5
7
4
6
IC1
(X09-4952-70) (B/4)
(X09-4952-70) (A/4)
A
IC3
0.6V
2.6V
3.4V
3.4V
-2.1V
3.4V
4.5V
-2.1V
-2.1V
3.9V
4.6V
4.6V
4.6V
4.6V
4.7V
3.0V
4.6V
4.6V
4.6V
9.3V
0.6V
0V
0.3V
1.2V
0.6V
0.6V
0.6V
11.3V
11.8V
0.2V
-12.4V
11.8
11.4V
-12.4V
WH3
WH3
SEL.
INPUT
WH2
E3
FAN CONTROL
CN1
D49
ATT.
-6dB
MUTE
D45
D44
TONE CONT.
ELECTRIC VOL.
Q3
Q4
Q2
Q1
D46
Q48
Q47
MUTE
DRIVE
DRIVE
ATT.
(BOTTOM VIEW)
Q37
Q51
D42
D51
FAN HI
FAN ON
CONT.
FAN
SPEED
ON/OFF
FAN
10V AVR
Q38
Q39
Q50
BUFFER
REC OUT
IC2
(2/2)
(1/2)
IC2
CONTROL
SYSTEM
E4
J5
J2
Rch
CD IN 1
TAPE PLAY 2
TAPE REC 3
J3
Lch
TAPE PLAY 2
CD IN 1
TAPE REC 3
J6
Rch
MD PLAY 2
AUX IN 1
MD REC 3
Lch
AUX IN 1
MD PLAY 2
J7
MD REC 3
R214
10K
-12V
-12V
+12V
+12V
+10V
+10V
+10V
+12V
+12V
-12V
-12V
+12V
+12V
-12V
-12V
-12V
+12V
+5.6V
+5.6V
+12V
-12V
-12V
-12V
+12V
+12V
+B
+B
+12V
+12V
+12V
+12V
+5.6V
+5.6V
+5.6V
+12V
+12V
+B
+12V
-12V
-12V
-12V
-12V
-12V
-12V
-12V
1/4W
+
C140
10u16
1/3
X05-
CN1
51
50
0
0
1
1
0
0
HI
LOW
OFF
FAN MOTOR
FAN ON
FAN HI
Pin No.
u-COM
C130
220P
C129
220P
R172
1K
R171
1K
NC
PLL CLK
PLL DATA
PLL DO
PLL CE
-12V
+12V
GND
Rch
Lch
T. MUTE
6
7
8
9
11
10
4
1
2
3
5
9
7
6
4
5
15
26
31
ATT
MUTE
+5.6V
+12V
-12V
R. IN
A. GND
L. IN
NC
1
2
3
4
5
6
7
8
9
+
C146
47u6.3
R212
100K
8
10
SD
DET
STEREO
SLEVEL
13
14
15
12
11
13
14
12
47K
R43
2.2K
47K
R41
1K
R45
1K
R46
2.2K
R37
+
C31
4.7u16
R39
2.2K
R40
2.2K
150
R191
+
C19
1u50
10K
R29
R30
10K
R189
1K
R190
1K
C137
220P
C138
220P
C29
C27
0.15
0.15
R33
5.6K
R31
2.7K
C21
5600P
C23
0.15
C25
0.15
0.15
C30
C28
R34
5.6K
0.15
0.15
C26
5600P
C22
C24
0.15
+
C32
4.7u16
R35
22K
22K
R36
2.2K
R44
R42
R201 100K
R197
10K
R200
390
R198
1K
R38
2.2K
R194
220K
R192
47K
C142
10u25
R195
3.3K
47K
R193
100K
10K
R204
1K
R202
100K
R196
C143
R199
2.2K
1u50
R203
20
SCL
SDA
LOUT
L
L
L
L
L
LIN
AVDD
10
9
8
7
6
5
4
3
2
1
+
C141
10u16
+
C20
1u50
R32
2.7K
MID OUT
BASS OUT
BASS IN
MID IN
TREBLE
DGND
AGND
ROUT
R
R
R
R
R
RIN
11
12
13
14
15
16
17
18
19
R210
330
R174
820 1W
+
C153
100u16
R213
2.2K
330
R211
Q50
0.01
C132
R26
220K
R25
220K
C16
220P
C62
100P
+
C17
10u25
+
C18
10u25
C61
100P
100P
C131
33
R28
33
R27
+
C13
10u25
+
C14
10u25
C15
220P
-
+
1
8
2
3
+
-
7
4
5
6
C126
0.01
21
23
26
C127
0.01
10
8
5
R170
1K
C128
470P
REC
TAPE
REC
MD
GND
15
16
CLK
C125
220P
R169
100K
C124
220P
R168
100K
ATT
MUTE
+5.6V
+12V
-12V
R IN
A GND
L IN
NC
1
2
3
4
5
6
7
8
9
SBUSY
SDATA
GND
3
2
1
68K
R4
68K
R16
100K
R12
1K
220P
C2
1K
C8
220P
R14
1K
C6
220P
R10
R2
R3
68K
R15
68K
R11
100K
R1
1K
C1
220P
R13
1K
220P
C7
R9
220P
C5
1K
5
R8
68K
8
R24
68K
10
R20
100K
R6
C4
1K
220P
R22
220P
C12
1K
R18
1K
220P
C10
26
23
21
R7
68K
220P
C3
1K
R5
R23
68K
220P
C11
R21
1K
17
18
DATA
NC
ST
13
NC
14
19
20
21
22
23
24
25
MD
12
11
10
8
9
7
6
26
28
27
AUX
TAPE
CD
29
30
VDD
TUNER
R
5
3
4
2
1
VEE
L
100K
R19
C9
1K
220P
R17
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R-SE9/SE9T(K)
1P
98.4.25
14:46
y [ W
17