A
1
2
3
4
5
6
7
8
9
10
B
C
D
E
F
G
H
I
J
K
L
M
N
129
DIGITAL 3/8
RX-V671/HTR-6064/RX-A710
★
All voltages are measured with a 10MΩ/V DC electronic voltmeter.
★
Components having special characteristics are marked
⚠
and must be replaced
with parts having specifications equal to those originally installed.
★
Schematic diagram is subject to change without notice.
IC51
IC51
IC51
CB52
IC52
IC53
IC53
IC54
IC52
: M12L128168A-5TG2T
2 M x 16-bit x 4 banks synchronous DRAM
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
V
DD
DQ0
V
DDQ
DQ1
DQ2
DQ3
DQ4
V
DDQ
DQ5
DQ6
V
SSQ
V
SSQ
DQ7
V
DD
LDQM
WE
CAS
RAS
CS
BA0
BA1
A
10
/AP
A
0
A
1
A
2
A
3
V
DD
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
V
SS
V
SS
DQ15
V
SSQ
DQ14
DQ13
V
DDQ
DQ12
DQ11
V
SSQ
DQ10
DQ9
V
DDQ
DQ8
NC
UDQM
CLK
CKE
NC
A
11
A
9
A
8
A
7
A
6
A
5
A
4
V
SS
L(U)DQM
DQ
Mode
Register
Control Logic
Column
Address
Buffer
and
Counter
Row
Address
Buffer
and
Refresh
Counter
Bank D
Row Decoder
Bank A
Bank B
Bank C
Sense Amplifier
Column Decoder
Data Control Circuit
Latch Circuit
Input and Output
Buffer
Address
Clock
Generator
CLK
CKE
Command Decoder
CS
RAS
CAS
WE
VDD
CE
Pin No.
1
2
3
4
5
Symbol
V
OUT
GND
CE
NC
V
DD
Description
Output Pin of Voltage Regulator
Ground Pin
Chip Enable Pin
No Connection
Input Pin
Vref
5
4
2
1
Current Limit
VOUT
GND
IC54
: R1172H121D-T1-F
CMOS-based positive-voltage regulator IC
1
3
2
5
4
GND
V
CC
IC53
:
TC7SH125FU
Bus buffer
IN A
G
OUT Y
FPGA
FPGA
SDRAM 128 Mbit
FPGA
to DIGITAL 5/8
to DIGITAL 6/8
to DIGITAL 5/8
to DIGITAL 5/8
to DIGITAL 2/8
to DIGITAL 4/8
to DIGITAL 1/8
No replacement part available.
DIGITAL (1)
No replacement part available.
No replacement part available.
DRAFT
