Yamaha RX-A760, Service Manual

Page: 115 / 170

A
1
2
3
4
5
6
7
8
9
10
K J I H G F E D C B L N M
115
RX-V681/RX-A760
DIGITAL 5/7
1
2
3
4
5
6
7
8
N C P U _ P O N
D G N D
C 9 5 0 7
0 . 1 / 1 0 ( B J )
+ 3 . 3 V M M C
N C P U _ P H O L D
N C P U _ V B U S D R V
N C P U _ M I S O
N C P U _ M O S I
N C P U _ A M U T E
D G N D
N C P U _ S D 2
I C 9 5 3
M F I 3 3 7 S 3 9 5 9
1
2
3
4
5678
N C P U _ N _ R S T
H R 9 0 3 1 2 5 C
C B 9 5 3
1
2
3
4
5
6
7
8
N C P U _ S D 3
N C P U _ S D 1
L 9 5 0 4
E X C 2 4 C E 9 0 0 U
1 4
3 2
D G N D
L 9 5 0 3
E X C 2 4 C E 9 0 0 U
1 4
3 2
D G N D
D G N D
N C P U _ N _ I N T
ST95
3
D G N D
N C P U _ B C K
R950
6
no_us
e
N C P U _ S D 0
R950
8
4.7K
N C P U _ M C K
D G N D
N C P U _ W C K
U S B _ V B U S _ P R T
D G N D
R950
7
no_us
e
DGND
DGND
C 9 5 0 6
0 . 1 / 1 0 ( B J )
D S P _ P O N
N C P U _ A D T _ M C K
N C P U _ A D T _ B C K
N C P U _ A D T _ W C K
N C P U _ A D T _ S D O
R 1 1 7 2 H 5 0 1 D - T 1 - F
I C 9 5 1
1
CEorCE
2
GN
D
3
NC
4
VD
D
5
VOUT
C
9
5
0
5
1
0
/
1
0
D G N D
C950
4
10/1
0
+ 5 . 6 V
+ 5 N E T
L 9 5 0 2
B L M 2 1 P G 6 0 0 S N 1 D
+ 3 . 3 V M M C
C 9 5 0 2
n o _ u s e
C 9 5 0 3
n o _ u s e
L 9 5 0 1
E X C 2 4 C E 9 0 0 U
1 4
3 2
D G N D
C 9 5 0 1
1 0 0 0 P ( B )
D950
3
A V R L 1 6 1 A 1 R 1 N T B
D950
1
no_us
e
D G N D
J 9 5 0 1
n o _ u s e
D950
2
A V R L 1 6 1 A 1 R 1 N T B
D G N D
D G N D
C950
9
0.1/10(BJ)
C950
8
0.1/10(BJ)
D G N D
N C P U _ S P I _ S C K
N C P U _ S P I _ M O S I
N C P U _ S P I _ N _ C S
N C P U _ S P I _ M I S O
R 9 5 1 0
3 3
R 9 5 1 2
3 3
R 9 5 1 4
3 3
R 9 5 1 3
3 3
R 9 5 1 1
3 3 X 4
12
4 5
78
3 6
R950
9
22
K
Q 9 5 0 1
D T C 0 4 4 E U B T L
R950
2
10
K
R950
1
10
K
DGND
R 9 5 1 6
1 0 K
N C P U _ A D T _ M U T E
CB95
4
n o _ u s e
1 2 3 4 5 6 7
DGND DGND
R951
8
47
DGND
R951
7
47
+ 3 . 3 V M M C
C B 9 5 2
1 3 4 2 0 3 5 6 0 W 3
1 2
3 4
5 6
7 8
0 1 9
2 1 1 1
4 1 3 1
6 1 5 1
8 1 7 1
0 2 9 1
2 2 1 2
4 2 3 2
6 2 5 2
8 2 7 2
0 3 9 2
2 3 1 3
4 3 3 3
6 3 5 3
8 3 7 3
0 4 9 3
2 4 1 4
4 4 3 4
6 4 5 4
8 4 7 4
0 5 9 4
2 5 1 5
4 5 3 5
6 5 5 5
8 5 7 5
0 6 9 5
C B 9 5 1
P H L
V B 8 5 8 4 0
1
2
3
4
5
L 9 5 0 5
B K P 1 0 0 5 H S 6 8 0 - T
I C 9 5 4
T C 7 S E T 0 8 F U
V +
5 IC954
V -
3
I C 9 5 4
+ 5 N E T
D G N D
C951
0
0.1/10(BJ)
J 9 5 0 2
n o _ u s e
R 9 5 1 9
1 0 0
U S B _ V B U S _ P O N
S T 9 5 1
R P 1 3 0 Q 3 3 1 D - T R - F
I C 9 5 5
n o _ u s e
4
VD
D
2
GN
D
3
VOUT
1
CE/C
E
C951
2
1/25
no_us
e
+ 3 . 3 N B + 5 . 6 V
D G N D
C951
1
1/25
no_us
e
+ 3 . 3 N B
J9504
no_us
e
0
J950
3
R 9 5 2 0
n o _ u s e
R 9 5 0 5
4 7
R 9 5 0 3
4 7
R 9 5 1 5
4 7
R 9 5 0 4
4 7 X 4
+ 5 N E T
0
J 9 5 0 5
+ 5 N E T
0
J 9 5 0 6
IC95
2T
C74LCX245FT(E
L
1
D I R
2
A 1
3
A 2
4
A 3
5
A 4
6
A 5
7
A 6
8
A 7
9
A 8
1
0 G N D
1
1
B 8
1
2
B 7
1
3
B 6
1
4
B 5
1
5
B 4
1
6
B 3
1
7
B 2
18
B 1
19
G
20
V C C
R952
1
no_us
e
D G N D
I C / C B / X L : 9 5 1 - 9 5 9
O H T E R : 9 5 0 1 - 9 6 9 9
S h e e t 5 : N E T
A p p l e C o P r o c e s s o r
E t h e r n e t
N C P U _ M C K : 2 4 . 5 7 6 M H z
D i f f e r e n t i a l I m p e d a n c e 1 0 0 o h m
S U N J U N Z F 2 8 6 7 0
H A N R U N Z F 2 8 6 6 0
U S B p o w e r p r o t e c t i o n
S D A
S C L
R S T
V C C
U S B _ D P
U S B _ D M
U S B _ V B U S
N C P U _ V B U S D R V
E T H _ R X _ M
E T H _ R X _ P
E T H _ T X _ M
E T H _ T X _ P
+ 3 . 3 V M M C
A P _ S D A
A P _ S C L
N C P U _ T X D
N C P U _ R X D
N C P U _ M U T E 1
N C P U _ M U T E 0
N C P U _ N _ R S T
N C P U _ S P I _ N _ C S
N C P U _ S P I _ M I S O
N C P U _ S P I _ M O S I
N C P U _ S P I _ S C K
N C P U _ P H O L D
N C P U _ A D T _ M U T E
D B G _ U A R T _ T X D
N C P U _ N _ I N T
N C P U _ A U P _ M C K X
N C P U _ A U P _ B C K X
N C P U _ A U P _ W C K X
N C P U _ A U P _ S D X 0
N C P U _ A U P _ S D X 3
N C P U _ A U P _ S D X 2
N C P U _ A U P _ S D X 1
N C P U _ Z _ A U P _ M C K X
N C P U _ Z _ A U P _ B C K X
N C P U _ Z _ A U P _ W C K X
N C P U _ Z _ A U P _ S D X 0
N C P U _ A D T _ S D R 0
N C P U _ A D T _ W C K R
N C P U _ A D T _ B C K R
N C P U _ A D T _ M C K R
/ O E O U T
L
H H
D I R
H i Z
L B A
A B
X
L
G N D
D +
F G
U S B
V B U S
D -
: L 9 5 0 1
D i f f e r e n t i a l I m p e d a n c e 9 0 o h m
to 007.sht (DIR/DAC
)
to 007.sh
t
(DIR/DAC)
to 006.sh
t
(DSP
)
to 004.sh
t
(CPU)
G N D
GN
D
DBG_RXD
A s i d e
DBG_LED0 DBG_LED1 N_RS
T
D E B U G
DBG_TXD +3.3VMMC
D B G _ U A R T _ R X D
+ 3 . 3 N B
+ 5 W L A N
T E N 5 + N A L W 5 +
+ 5 N E T
I C 9 5 2
X 7 7 8 7 A 0 : T C 7 4 L C X 2 4 5 F T ( E L
Y G 2 6 3 A 0 : 7 4 L V C 2 4 5 A P W
V
DD
CE
Pin No.
1
2
3
4
5
Symbol
CE
GND
NC
V
DD
V
OUT
Description
Chip Enable Pin ("H" Active)
Ground Pin
No Connection
Input Pin
Output Pin
Vref
5 4
2 1
Current Limit
V
OUT
GND
IC951
: R1172H501D-T1-F
Voltage regulator
IC954
: TC7SET08FU
2 input AND gate
1
2
3
IN A
IN B
GND 4
5
OUT Y
VCC
A
L
L
H
H
B
H
L
H
L
Y
H
L
L
L
IC952
: TC74LCX245FT
Low-Voltage Octal Bus Transceiver
A1
A2
A3
A4
A5
A6
A7
A8
1
2
3
4
5
6
GND
DIR
OE
B1
B2
B3
B4
B5
B6
B7
B8
Vcc
7
8
9
10
20
19
18
17
16
15
14
13
12
11
to Network module
DIGITAL (1)
to DIGITAL 4/7
to DIGITAL 7/7
to DIGITAL 7/7
to DIGITAL 6/7
NETWORK
(NET)
RESISTOR
REMARKS
NO MARK PARTS NAME
CARBON
CARBON
METAL
METAL
METAL
FIRE
CEMENT
SEMI
FILM RESISTOR
FILM RESISTOR
OXIDE FILM RESISTOR
FILM RESISTOR
PLATE RESISTOR
PROOF CARBON FILM RESISTOR
MOLDED RESISTOR
VARIABLE RESISTOR
(P=5)
(P=10)
CHIP RESISTOR
REMARKS
CAPACITOR
PARTS NAME
NO
NO
MARK
MARK
ELECTROLYTIC CAPACITOR
CERAMIC CAPACITOR
POLYESTER FILM CAPACITOR
POLYSTYRENE FILM CAPACITOR
MICA CAPACITOR
POLYPROPYLENE
FILM CAPACITOR
SEMICONDUCTIVE CERAMIC CAPACITOR
P
TANTALUM CAPACITOR
TUBULAR
S
CAPACITOR CERAMIC
FILM SULFIDE POLYPHENYLENE
CAPACITOR
N O T I C E
U.S.A
G
CANADA
STANDARD
L
CHINA
AUSTRALIA
SINGAPORE
KOREA
GENERAL
U
C
T
A
K
R
JAPAN
(model)
B BRITISH
J
SOUTH EUROPE E
V
TAIWAN
F RUSSIAN
P LATIN AMERICA
S BRAZIL
H THAI
No replacement
part available.
Page 118 K7
to OPERATION (1)_W310
(RX-V681)
Page 121 J7
to OPERATION (12)_W309
(RX-A760)
4.975V
3.323V
4.987V
3.323V 0.000V 3.323V 3.281V 0.000V 0.000V 0.000V
4.987V
4.987V
Details of colored lines
Red / full line: Power supply (+)
Red /dashed line: Power supply (-)
Orange:
Signal detect
Yellow: Clock
Green: Protection detect
Brown: Reset signal
Blue: Panel key input
RX-V681 RX-A760
★
All voltages are measured with a 10M
Ω
/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.