Yamaha AX-V765, Руководство по обслуживанию

Страница: 116 / 156

A
1
2
3
4
5
6
7
8
9
10
B C D E F G H I J K L M N
RX-V765/HTR-6270/AX-V765
116
DIGITAL 4/5
★
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.
● 電圧は、内部抵抗 10MΩの電圧計で測定したものです。
● ⚠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ございます。
IC66
IC65
IC61
IC62
IC63
IC67
IC67
IC67
IC67
IC68
CB61
CB64
CB62
CB63
2.5
0
0
0
0
3.4
1.7
1.7
1.7
1.3
3.4
3.4
3.4
3.3
3.3
0.4
0
0
0
0
1.7
1.7
1.7
1.3
5.1
0
1.3
1.3
0
0
0
0
1.7
1.7
2.5
2.6
0
0
3.3
0
0
5.1
0
0
0
0
5.1
5.1
0
10.3 5.1
4.9
2.6
2.6
2.6
2.5
0
0
0
0
1.3
1.3
1.3
2.5
2.5
2.5
2.5
2.5
2.5
2.5
1.7
1.7
1.7
1.7
1.7
1.7
0
3.4
0
0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
3.4
0.5
5.0
3.3
3.4
0
0
0
3.3
3.3
3.4
2.6
5.1
5.0
0.2
0.2
5.3
12.0
-11.9
0
0
0
0.4
0.4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
3.4
3.4
5.0
5.0
5.0
5.0
5.0
-11.8
-11.8
-11.8
-11.8
-0.4
-0.4
3.3
1.0
1.3
0
0.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
SUBWOOFER
SURROUND L
CENTER
SURROUND BACK L
FRONT L
FL/FR
C/SW
SL/SR
SBL/SBR
DIGITAL IN
ANALOG IN
DIGITAL IN
IC62 : TC74VHC157FT
Quad 2-channel multiplexer
SELECT 1
1A 2
1B 3
1Y 4
2A 5
2B 6
2Y 7
GND 8
Vcc 16
ST 15
4A 14
4B 13
4Y 12
3A 11
3B 10
3Y 9
A S G
B A
Y B
A Y
B A
Y Y B
IC65 : PCM1680DBQR
Audio digital-to-analog converter
Output Amp and
Low-Pass Filter
System Clock
Manager
Enhanced
Multilevel
DeltaœSigma
Modulator
DAC
Serial
Input
I/F
Function
Control
I/F
System Clock
Zero Detect Power Supply
DAC
Output Amp and
DAC
DAC
Output Amp and
DAC
Output Amp and
DAC
Output Amp and
V
OUT
1
V
OUT
2
V
OUT
3
V COM
V OUT 4
V
OUT
5
V
OUT
6
Low-Pass Filter
Low-Pass Filter
Low-Pass Filter
Low-Pass Filter
Low-Pass Filter
Output Amp and
A
GND2
V
CC
2
A
G
ND1
V
CC
1
DGND
V
DD
ZER
O1
ZER
O2
BCK
LRCK
DATA1 (1, 2)
DATA2 (3, 4)
DATA3 (5, 6)
DATA4 (7, 8)
MS/ADR
MC/SCL
MD/SDA
MSEL
SCK
8
Oversampling
Digital Filter
With
Function
Controller
DAC
Output Amp and
DAC
Output Amp and
V OUT 7
V OUT 8
Low-Pass Filter
Low-Pass Filter
(1) Open-drain output for the PCM1782
NOTE: Signal names in parentheses ( ) are for the PCM1781.
Power Supply
Enhanced
Multilevel
Delta-Sigma
Modulator
VOUTL
Oversampling
4 x 8
Digital
Filter
With
Function
Control
Audio
Serial
Port
BCK
LRCK
DATA
Serial
Control
Port
Zero Detect
(TEST)
SCK
System
Clock
Manager
MC (DEMP1)
MS (DEMP0)
Output Amp
and
Low-Pass Filter
MD (MUTE)
DAC
VCOM
System Clock
AGND
V
CC
ZEROR/ZEROA
(1)
(ZEROA)
ZEROL/NA
(1)
Output Amp
and
Low-Pass Filter
DAC
VOUTR
(FMT)
ZEROA
V
OUT
L
V OUT R
V
COM
AGND
V
CC
NC
TEST
16
15
14
13
12
11
10
9
FMT
DEMP0
DEMP1
MUTE
SCK
DATA
BCK
LRCK
1
2
3
4
5
6
7
8
IC61 : PCM1781DBQR
Audio digital-to-analog converter
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
V
IN
L
V
IN
R
V
REF
1
V REF 2
V
CC
AGND
PDWN
BYPAS
TEST
LRCK
MODE1
MODE0
FMT1
FMT0
OSR
SCKI
V
DD
DGND
DOUT
BCK
IC66 : PCM1803DBR
Stereo A/D converter
BCK
VINL
Reference
VREF1
VREF2
VINR
Delta-Sigma
Modulator
Delta-Sigma
Modulator
x 1/64, x 1/128
Decimation
Filter
With
High-Pass Filter
Power Supply
AGND VCC VDD DGND
Clock and Timing Control
Serial
Interface
Mode/
Format
Control
LRCK
DOUT
FMT0
FMT1
MODE0
MODE1
BYPAS
OSR
PDWN
SCKI
TEST
IC67 : TC74VHCT08AFT
Quad 2-input AND gate
Vcc 14
4B
4A
4Y
3B
3A
3Y
1A 1
2
3
13
12
11
10
9
8
4
5
6
7
1B
1Y
2A
2B
2Y
GND
IC63 : NJM78M05DL1A (TE1)
Voltage regulator
INPUT
OUTPUT
GND
1
3
2
5
4 GND
V
CC
IC68 : TC7SH08FU
2-input AND gate
IN A
IN B
OUT Y
(U model)
8 ch DAC
2 ch ADC
2 ch DAC
SELECTOR
to DIGITAL 3/5
to DIGITAL 3/5
to DIGITAL 2/5
to DIGITAL 3/5
C601
RX-V765/AX-V765
HTR-6270
HTR-6270
0.1/16
10/25
to OPERATION (2)_CB452
Page 119 B3
to OPERATION (2)_CB455
Page 119 D3
to OPERATION (2)_CB458
Page 119 E3