Sony XES-Z50 Service Manual page 108

IC804 MBM29F400BA-70PFTN-MA02
A15
1
A14
2
A13
3
X
A12
4
DECODER
A11
5
A10
6
A9
7
ADDRESS
A8
LATCH
8
Y
DECODER
NC
9
NC
10
STB
WE CONTROL
11
CIRCUIT
RESET
12
13 NC
14 NC
RY/BY
15
16 NC
A17
17
A7
18
RY/BY
A6
BUFFER
19
A5
20
A4
21
A3
22
A2
23
A1
24
IC805 CXK516100TM-70LL-TL
A4
1
A3
2
A2
3
A1
4
A0
5
CE
6
I/O1
7
I/O2
8
I/O3
9
I/O4
10
VCC
MEMORY
11
MATRIX
GND
12
512 x 1024
I/O5
13
I/O6
14
I/O7
15
I/O GATE
I/O8
I/O
16
COLUMN
BUFFER
DECODER
WE
17
A15
18
A14
19
A13
20
A12
21
22 NC
4,194,304
CELL
MATRIX
Y GATE
I/O
BUFFER
DATA
LATCH
STB
LOW VCC
DETECTOR CIRCUIT
WRITE/ERASE
PULSE TIMER
WRITE CIRCUIT
ERASE CIRCUIT
CHIP ENABLE/
OUTPUT ENABLE
CIRCUIT
LEVEL
SHIFT
& CONTROL
BUFFER
MEMORY
ROW
MATRIX
DECODER
512 x 1024
I/O GATE
PRE
COLUMN
DECODER
DECODER
LEVEL
SHIFT &
BUFFER
A16
48
BYTE
47
46
GND
DQ15/A–1
45
DQ7
44
DQ14
43
DQ6
42
DQ13
41
DQ5
40
DQ12
39
DQ4
38
37
VCC
DQ11
36
DQ3
35
DQ10
34
DQ2
33
DQ9
32
DQ1
31
DQ8
30
DQ0
29
OE
28
GND 27
CE
26
A0
25
A5
44
A6
43
A7
42
OE
41
UB
40
LB
39
I/O16
38
I/O15
37
I/O14
36
I/O13
35
GND
34
VCC
33
I/O12
32
I/O11
31
I/O
I/O10
BUFFER
30
I/O9
29
NC
28
A8
27
A9
26
A10
25
A11
24
23
NC
– 159 –