Yamaha HTR-4064 Service Manual page 92

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A
B
C
RX-V471/HTR-4064
DIGITAL 2/6
1
POINT A XL31 (Pin 3)
2
3
4
5
6
7
CB31
8
9
IC32: M12L128168A-5TG2T
2 M x 16-bit x 4 banks synchronous DRAM
CLK
Clock
Generator
CKE
Row
Address
Address
Buffer
Mode
and
Register
Refresh
Counter
10
Column
CS
Column Decoder
Address
RAS
Buffer
CAS
and
Counter
Data Control Circuit
WE
92
D
E
F
3.4
1.6
0
A
to DIGITAL 1/6
No replacement part available.
サービス部品供給なし
3.4
0
3.4
0
3.4
0
IC34
3.4
0
0
3.4
FPGA
0
3.4
0
3.4
0
3.4
0
3.4
0
0
3.4
0
3.4
0
3.4
0
0
3.4
3.4
0
0
3.4
0
3.4
0
3.4
0
0
3.4
3.4
0
0
3.4
0
0
1.3
1.3
0
1.3
1.3
0
1.3
0
1.3
0
1.3
1.3
0
0
1.3
1.3
0
3.4
0
0
3.4
3.4
3.4
3.2
3.4
3.4
3.2
3.4
3.2
3.1
0
V
DD
1
54
V
SS
IC33: R1172H121D-T1-F
2
53
DQ15
DQ0
V
3
52
V
SSQ
CMOS-based positive-voltage regulator IC
DDQ
51
DQ14
DQ1
4
DQ2
5
50
DQ13
Bank D
V
SSQ
6
49
V
DDQ
Bank C
DQ3
7
48
DQ12
V
DD
4
Bank B
DQ4
8
47
DQ11
V
9
46
V
DDQ
SSQ
DQ5
10
45
DQ10
44
DQ9
DQ6
11
Bank A
V
12
43
V
SSQ
DDQ
DQ7
13
42
DQ8
V
14
41
V
DD
SS
LDQM
15
40
NC
CE
1
WE
16
39
UDQM
Sense Amplifier
L(U)DQM
CAS
17
38
CLK
18
37
CKE
RAS
Pin No.
Symbol
CS
19
36
NC
35
BA0
20
A
11
1
CE
BA1
21
34
A
9
2
GND
A
10
/AP
22
33
A
8
DQ
A
23
32
A
3
NC
0
7
A
1
24
31
A
6
V
4
DD
25
30
A
A
2
5
V
A
26
29
A
4
5
OUT
3
28
V
V
DD
27
SS
G
H
No replacement part available.
サービス部品供給なし
0
0
0
0
0
0
IC34
0
0
0
0
0
FPGA
0
0
0
0
0
0
0
0
0
0
0
1.3
0
0
0
0
0
0
0
0.9
0
0
0
1.3
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1.8
2.8
1.6
2.8
0
2.8
0
2.8
0
2.8
2.8
2.8
2.8
2.8
5
V
OUT
IC35: TC7SH125FU
Vref
Bus buffer
Current Limit
2
GND
G
1
5
V
CC
Description
IN A
2
Chip Enable Pin
Ground Pin
OUT Y
GND
3
4
No Connection
Input Pin
Output Pin of Voltage Regulator
I
J
K
No replacement part available.
サービス部品供給なし
1.0
0
1.8
1.8
IC34
0
1.8
1.8
FPGA
1.8
1.8
1.6
3.2
1.8
1.8
0
2.3
3.2
2.3
1.7
2.3
1.7
2.3
1.4
2.8
1.8
1.8
0
1.8
0
2.3
3.2
2.8
3.3
2.8
3.2
1.8
1.8
0
2.8
0
2.8
2.8
0
2.8
3.2
2.8
3.2
2.8
3.2
1.9
0
1.5
0
3.1
1.3
3.2
1.3
2.3
1.8
2.5
1.8
1.3
0
2.3
0
2.5
0
3.3
3.2
1.8
3.2
1.8
3.2
1.8
0
3.4
1.4
1.7
1.6
1.8
3.4
3.4
1.8
3.3
3.4
1.6
1.6
IC35
3.4
0
SDRAM
IC32
★ All voltages are measured with a 10MΩ/V DC electronic voltmeter.
★ Components having special characteristics are marked
with parts having specifications equal to those originally installed.
★ Schematic diagram is subject to change without notice.
L
M
N
to DIGITAL 1/6
to DIGITAL 4/6
1.3
1.8
IC33
0
1.8
● 電圧は、内部抵抗 10MΩの電圧計で測定したものです。
and must be replaced
印のある部品は、安全性確保部品を示しています。部品の交換が必要な場合、
パーツリストに記載されている部品を使用してください。
● 本回路図は標準回路図です。改良のため予告なく変更することがあります。

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