Aiwa XR-MSK3 Service Manual page 27

IC, LH5V2RN1
A17 30
A16 2
A15 8
A14 29
28
A13
A12 4
A11 25
A10 23
26
A9
ADDRESS ADDRESS
27
A8
BUFFER DECODER
A7 5
A6 6
A5 7
8
A4
A3 9
A2 10
A1 11
12
A0
TIMING
CE 22 BUFFER
CIRCUIT
OE 24 BUFFER
32
VCC GND
IC, MSM54V16258B/BSL
29
OE
16
RAS
31
LCAS
30
UCAS
18
A0~A3
21
24
A4~A8
28
Vcc 22
VSS 23
MEMORY MATRIX
(262.144 X 8bit)
COLUMN
SELECT
SENSE AMP
BUFFER
16 13 14 15 17 18 19 20 21
Timing
Generator
Burst
Address
Counter
Column
9
Address
Buffer
Internal
Refren
Address
Control Clock
Buffer
Internal
Row
9 9
Address
Decoders
Counter
Drivers
On-chlp
Vdd Generator
IC, BA5915FP
28 27 26
10k
10k
LEVEL SHIFT
LEVEL SHIFT
6.65k
10k
10k
10k
10k
1 2 3
WE
15
I/O
Controller
I/O
Controller
9 Column Decoders
Sense Amp
16
Word
Memory
Colls
-27-
25 24 23 22
10k VCC VCC
10k
10k
T.S.D
6.65k
CH1
MUTE
10k
N.C N.C
4 5 6 7
Output
8
8
Buffers
8
Input
8
8
Buffers
I/O
16
Selector
Input
8
8
Buffers
8
Output
8 8
Buffers
21 20 19 18 17 16 15
10k 10k
10k
10k
6.65k
LEVEL SHIFT
LEVEL SHIFT
6.65k
10k
10k
10k 10k
8 9 10 11 12 13 14
2
DQ0~DQ3
5
7
DQ4~DQ7
10
35
DQ8~DQ11
38
40
DQ12~DQ15
43