Sony CFD-980 Service Manual page 33

QQ
3 7 63 1515 0
IC703 BA6898S
32 31
1 2
TE
L 13942296513
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.
http://www.xiaoyu163.com
30 29 28 27
LEVEL
SHIFT
– +
–
– +
LEVEL
SHIFT
3 4 5 6
IC706 MB814400C
DQ1
1
DQ2
2
WE
3
WRITE
CLOCK
GENERATOR
CLOCK
GENERATOR
2
CLOCK
GENERATOR
1
MODE
RAS
4
CONTROL
A9
5
A0
9
A1
x ao 10
y
A2
11
A3
12
i
VCC
13
http://www.xiaoyu163.com
8
26 25 24 23
OP-AMP
+
LEVEL
SHIFT
10
7 8 9
Q Q
3 6 7 1 3
DATA INPUT
DATA OUTPUT
BUFFER BUFFER
4M BIT
SENSE AMP
COLUMN
MEMORY
DECODER I/O GATE
CELL
ROW
DECODER
PRE-
ADDRESS
BUFFER DECODER
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.
— 49 —
2 9 9 4 2 8
22 21 20 19
LEVEL
SHIFT
+ –
REGULATOR
BIAS
T.S.D.
MONITOR
– +
11 12 13 14
1 5 0 5 8 2 9 9 4
VSS
26
25 DQ4
DQ3
24
CAS
23
OE
22
BOARD
BIAS
GENERATOR
REFRESH
ADDRESS
COUNTER
m
A8
18
A7
17
A6
co 16
15
A5
A4
14
9 9
18 17
DRIVER-MUTE
50K
15 16
2 8 9 9