Technics SX-KN6500 Service Manual page 79

SCHEMATIC DIAGRAM-1
A
MAIN CPU CIRCUIT
A[0-25]
D[0-31]
DSP.RST
CP.GATE
SELF.LED
FDC.TC
PMUT
MACSEL
CP.CLK
PC.TX
PC.RX
MIDI.TX
MIDI.RX
CP.DATA
LORST
HDD.CS
EXP.CS0
EXP.CS1
PQRT.EXP
HDD.LOCS
TGCS
JIGU.CS
FDC.CS
FDC.DACK
ADSPAB
LCD.CS
ADSPCS
DSP.FLAG0
HDD.INT
FDC.INT
TOC.SNS
PP.INT
RDD.INDEX
SNS
DSP.RDY
LCD.WAIT
WE2
WE3
CLK1
R/NW
RE
BUSCLK
FDC.DRQ
NOTE:
The number which noted at the connectors on the schematic diagram as
"SCHEMATIC DIAGRAM-1" or "SCHEMATIC DIAGRAM-2"
indicates the schematic diagram serial number located on the left corner in the schematic diagram.
R46 4.7K
R2
Q1
100K
2SB709AR
C3
D3
R45 R1 0.22
MA111TX
1K 1K
D2
MA111TX
IC1
+3.3D
C1
TC74VHC138F
0.1
(3 TO 8 DECORDER)
16
VCC
7
7
6
9 A0 1
10 5 A1 2
11 4 A2
3
Y
12 3
CS2 4
2
13 CS3 5
1
14 CS1 6
15 0
VSS
8
IC2
+3.3D
TC74VHC139F
C2
(2 TO 4 DECORDER)
0.1
16
VCC
9 2Y3 1Y3 7
10 2Y2 1Y2 6
11 2Y1 1Y1 5
2Y0 1Y0
12 4
15 2E 1E
1
14 2DA 1DA
2
13 2DB 1DB 3
GND
8
+3.3D
Q2
2SD601AQ
IC3
TC74VHC139F
C8
(2 TO 4 DECORDER)
0.1
R4
4.7K
16
VCC
9 2Y3
10 2Y2
2Y1
11
12 2Y0
15 2E
X 14 2DA
Y 2DB
13
GND
Q
8
R
S
+3.3D
Z1
4.7Kx8
Z2
47x4
X
W
+3.3D
1Y3 7
1Y2 6
1Y1
5
A
1Y0 4 B
C
D
1E
1
E
1DA
2
F
1DB G
3
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
IC5
TC7SH02FU
(2 INPUT NOR GATE)
GND VCC
1 2 3 4 5
+3.3D
R40 470
R17 4.7K