Technics SX-KN6500, Service Manual

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SCHEMATIC DIAGRAM-17
MAIN DSP CIRCUIT
A
A
B
A
B
6
4
7
3 A1
A0
5
2
16
17
18
A3
A2 B2
B1
B0
A5
A4
8 A6
A7
20
10
VCC
R302
+3.3D
4.7K
C303
0.1
GND
34
1
19
B3
B5
B4
B6
11
15
12
13
14
B7
OE
DIR
9
6
4
7
3 A1
A0
5
2
16
17
18
A3
A2 B2
B1
B0
A5
A4
8 A6
A7
20
10
VCC
GND
34
1
19
B3
B5
B4
B6
11
15
12
13
14
B7
OE
DIR
9
6
4
7
3 D1
D0
5
2
17
18
19
D3
D2 Q2
Q1
Q0
D5
D4
8 D6
D7
20
10
VCC
GND
34
1
11
Q3
Q5
Q4
Q6
12
16
13
14
15
Q7
CK
OE
9
C
D
C
D
P
O
N
M
L
K
I
J
f
e
d
c
b
a
Z
Y
TC74VHC245F
(BUS TRANSCEIVER)
H
G
F
E
D
C
B
A
X
W
V
U
T
S
R
Q
X
W
V
U
T
S
R
Q
H
G
F
E
D
C
B
A
TC7WH125FU
(DUAL 3 STATE BUFFER)
TC74VHC245F
(BUS TRANSCEIVER)
TC74VHC574F
(D TYPE FLIP- FLOP)
R301
+3.3D
4.7K
C301
0.1
+3.3D
C302
0.1
GND VCC
1 2 3 4 5
IC301 IC303
IC302
IC22
DSP.RST
DSP.FLAG0
TC7SH32FU
(2 INPUT OR GATE)
IC21
+3.3D
VCC
GND
Y2
A1
G1
G2
Y1
A2
1
2
3
4
8
7
6
5
C305
3P
C304
3P
R303
10K
R304
47
X301
30MHz
+3.3D
MTMG
LRCKX
BCKX
SDIE[0-3]
ADSPAD
WE2
RE
ADSPCS
DSP.RDY
D[0-31]
SDOE[0-3]