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SCHEMATIC DIAGRAM-1
A
MAIN 1/4 CIRCUIT
A[0-25]
D[0-31]
IORST
PWM
CP.GATE
SELF.LED
FDC.TC
PMUT
MACSEL
CP.CLK
PC.TX
PC.RX
MIDI.TX
MIDI.RX
CP.DATA
PORT.EXP
LCD.NIOCS
TGCS
JIGU.CS
FDC.CS
FDC.DACK
LCD.MMCS
LRQO
D98.INT
FDC.INT
TOC.SNS
FDC.INDEX
SNS
LCD. WAIT
WE2
WE3
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.
+3.3D
R2
4.7K
R4
100K
C2
Q1
0.22
2SB709ARTX
D2
MA111TX
R1
R3
1K
1K
D1
MA111TX
+3.3D
C1
0.1
IC1
16
TC74VHC138F
VCC
(3 TO 8 DECORDER)
7
7
6
A0
9
1
10
5
A1
2
11
4
A2
3
Y
12
3
CS2
4
13
2
CS3
5
1
CS1
14
6
15
0
GND
8
SX-PR1000 MAIN 1/4 SCHEMATIC DIAGRAM
+3.3D
Q2
2SD601AQ
A
B
C
D
Z6
R6
E
4.7Kx8
4.7K
F
G
H
+3.3D
I
J
K
Z9
L
4.7Kx8
M
N
O
P
+3.3D
Q
R
Q
S
T
Z12
R
U
4.7Kx8
S
V
W
X
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