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IC301 BA6287F-T1
OUT1
1
VM
2
DRIVER
TSD
VCC
3
CONTROL LOGIC
POWER
SAVE
FIN
4
IC502 KM62256DLG-7LT
LEVEL
A14
1
BUFFER
SHIFT
A12
2
A7
3
A6
4
A5
5
A4
6
A3
7
LEVEL
BUFFER
SHIFT
8
A2
9
A1
10
A0
I/O1
11
LEVEL
I/O2
12
BUFFER
SHIFT
I/O3
13
14
GND
8
GND
7
OUT2
DRIVER
6
VREF
5
RIN
28 VCC
27
26 A13
25 A8
24
MEMORY
ROW
MATRIX
23 A11
DECODER
512X512
22 OE
21 A10
I/O GATE
20 CE
COLUMN
DECODER
19 I/O8
18 I/O7
17 I/O6
16
15
I/O BUFFER
IC302 BA8272F-E2
14
13
12
1
2
3
IC601 TC9464FN-EL
24
23
22
21
WE
INTERFACE
CIRCUIT
A9
DIGITAL FILTER CIRCUIT
ATTENUATOR OPERATIONAL CIRCUIT
DEEMPHASIS FILTER CIRCUIT
D-∆ MODULATION CIRCUIT
TEST
CIRCUIT
I/O5
I/O4
1
2
3 4
– 43 –
11
10
9
8
RESET
SWITCH
4
5
6
7
20
19
18
17
16
15
MICROCOMPUTER
OSC
INTERFACE
CIRCUIT
TIMING
GENERATOR
OUTPUT
OUTPUT
CIRCUIT
CIRCUIT
ANALOG
ANALOG
FILTER
FILTER
5
6
7
8
9
10
14 13
11
12
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