Sony CDX-C90 Service Manual page 67

IC4 MB814400C-70PFTN (SERVO BOARD)
DQ1 1
DQ2
2
WE
3
WRITE
CLOCK
GENERATOR
CLOCK
GENERATOR
2
CLOCK
GENERATOR
1
MODE
RAS
4
CONTROL
A9
5
A0
9
A1
10
A2
11
A3 12
VCC
13
IC7 BA6797FP-E2
28
LEVEL
VCC/2
1
DATA INPUT DATA OUTPUT
BUFFER BUFFER
4M BIT
SENSE AMP
COLUMN
MEMORY
DECODER I/O GATE
CELL
ROW
DECODER
REFRESH
ADDRESS PRE-
ADDRESS
DECODER
BUFFER
COUNTER
27 26 25 24
VCC/2 VCC/2
– +
IN
LEVEL SHIFT
SHIFT
IN
–
+
VCC/2
2 3 4 5 6
IC601 BA6195FP-YT2
26 VSS
25 DQ4
25 24
DQ3
24
–
CAS
23
22 OE
BOARD
BIAS
GENERATOR
A8
18
17 A7
A6
16
15 A5
14 A4
23 22 21 20 19 18
VCC VCC
7 8 9 10 11 12
– 92 –
23 22 21 20 19
THERMAL
SHUT DOWN
DRIVER
MUTE
+
+
IN
–
1 2 3 4 5 6 7 8 9 10 11
17 16 15
VCC/2 VCC/2
+ –
IN
LEVEL SHIFT
SHIFT
LEVEL
IN
+ –
VCC/2 VCC/2
13 14
18 17 16 15 14
LEVEL SHIFT
+ –
– + + –
12 13