Kenwood AR-304 Service Manual page 12

P
QQ
AUDIO UNIT
3 7 63 1515 0
(X09-6XXX-XX)
(A/8)
1
CN7
DET 15
S LEVEL 14
SD 13
STEREO 12
R ch 11
GND 10
X05-
CN1
2
1/3
L ch 9
A +15V 8 +B
-15V 7 B
T MUTE 6
PLL DT 5
PLL CLK 4
PLL CE 3
PLL DO 2
CH SP 1
3
J1
L 1
PHONO
TE
L 13942296513
R 2
4
J2
L 1
CD
R 2
L 3
AUX
5
R 4
L
5
MD/TAPE
REC OUT
R
6
J3
L 1
MD/TAPE
PLAY IN
R 2
6
3
L
TAPE2/MONITOR
REC OUT
www
4
R
L 5
TAPE2/MONITOR
PLAY IN
R 6
7
Q
CN8
31 30 29 28 27 26 25
W155
10
+15V
12
13
C122
0.01
14.7V
+
R
+
14.2V
-14.9V
31
16
15
27
L
14
-14.9V
W156
15V
R1 C3
1K 10u16
+
R2 C4
1K 10u16
+
R17
1K
R18
25
1K
R91
5
1K
R92
24
1K
R21
11
1K
R22
17
1K
R19
1K
R20
21
1K
14.7V
IC4
(1/2)
C115
R25 4.7u35
1
+
1K
C116
R26 4.7u35
+
1K
x ao
(2/2)
R23
7
1K
. i
OUTPUT BUF.
R24
1K
R
24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
16
PHONO EQ AMP +15V
14.7V 0V
IC1
0V
(1/2)
R5
100 8 C123
3
4.7u35
1
0V 2
+
R7 C11 0.012 C13 3300P
+ 360
R9 270K R11 22K
R10 270K R12 22K
+ R8
C12 0.012 C14 3300P
Q Q
360
C124
0V 6
3 6 7
R6 4.7u35
7
100
0V 5
+
0V
4
IC1
15V
(2/2)
-14.9V
C132
4700P
C130 0.82
C128 5600P
C34 3.3u50
+15V
8
3
2
C83 100P
R199 220K
R40
12K
R84 220K
IC4
R200 220K R38 13K
u163
y
6 C84 100P R74 39K
R50 6.8K
5
4
-14.9V
+15V
15V
S
2 9 9 4
8
9 8 7 6 5 4 3 2 1
+5.6V
21
+15V
IC3
INPUT
SELECTOR
C105
100P
15V
R15
100
3
Q45
C42
100P
R16
1 3 1 5 0 5 8 2 9
100
26
IC2
(BOTTOM VIEW)
0V
E.VOL
24
23
0V 22
21
BVOL
SELECT
20
T
150K
N
19
S
0V 18
12K
0V 17
150K
0V 16
15
14
13
12
12K
0V 11
10
9
NC3
8
NC2
7
NC1
6
0V 5
m
4
INPUT
3
0V 2
co
0V 1
PORT OUTPUT
.
T
2 8
9 9
+5.6V
30V
15V
+15V
C79
1000P
R156
D28
1.2K
1/4W
C107
Q45
10u35
+7V
AVR
8.0V
R183
D1
470
9 4 2 8 9 9
C108
10u35
MICROCOMPUTER
INTERFACE
TONE
PASS
0 1
-7.6V
+15V
15V
7V