Akai PD-X3780SR, Service Manual

Page: 15 / 23

19
IC LEAD IDENTIFICATION AND INTERNAL DIAGRAMS
OSC03A
OSC1
OSC2
STP
CLOCK
GEN
RESET PC INC PC STACK 8
ROM
16384 x 8 BIT
SYSTEM
CLK
RAM
612 x 4 BIT
INSTRUCTION
DECODER
E H X L
Y ALU ACC
FLAG
FLAG
STK
TEST RESET
INTERRUPT
CONTROL
G
STK
IRQ
DPH
DPL
U-DUS
L-HUS
P
W
C
0
1
A
T
M
R
0
3
B
S
T
P
0
4
A
B
IX
0
3
A
P
IO
1
1
A
P
IO
1
1
A
P
IO
1
1
A
S
IO
0
4
B
S
IO
0
4
B
A
D
C
8
3
A
8
C
H
-8
B
IT
/D
IG
IT
A
L
-IN
IR
Q
IR
Q
IR
Q
S
T
P
IR
Q
S
T
P
P
W
C
T
0
,T
1
W
0
~
W
3
B
IN
P
0
0
~
P
0
3
P
1
0
~
P
1
3
P
2
0
~
P
2
3
S
C
K
0
S
C
K
1
S
IO
0
S
IO
1
A
D
C
0
~
7
S
IN
0
S
IN
1
IR
Q
IR
Q
L
C
D
0
7
A
C
O
M
M
O
N
G
E
N
.
...
...
...
...
...
...
.
B
IA
S
G
E
N
.
...
...
...
...
...
...
D
IS
P.
S
E
C
M
E
N
T
D
R
IV
E
R
C
O
M
0
~
3
S
E
G
0
0
~
0
3
S
E
G
0
4
~
0
7
S
E
G
0
8
~
1
1
S
E
G
1
2
~
1
5
S
E
G
1
6
~
1
9
CPU02A
IC301 BH4453F
BIAS
+
+
MUTE
MUTE
TSD
1
2 3 4
8
7
6
5
OUT1 IN1 GND
VCC OUT2 BIAS
IN2
2
4
.7
K
2
4
.7
K
16.9dB
16.9dB
IC501 BU24590-8W