Yamaha RX-V3800 - AV Receiver, Service Manual

Page: 53 / 99

IC701
CB701
IC751
IC752
W751
IC752
IC753
IC753
IC753
IC754
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-V3800/DSP-AX3800
143
★
All voltages are measured with a 10M
Ω
/V DC electronic voltmeter.
★
Components having special characteristics are marked s and must be replaced
with parts having specifications equal to those originally installed.
★
Schematic diagram is subject to change without notice.
NET 2/2
0 2.5
2.5
2.5
2.5
0
0
0
0
0
0 0.1
3.3
2.5
3.3 3.3
3.3
3.3
1.7
1.7
2.5
0.1
3.3
3.3
3.3
3.3
3.3
3.3
0.1
0.1
0
0
0
0.1
0.1
0.1
0.1
0.1
0.1
1.2
1.2
2.5
2.5
2.5
3.3
3.3
3.3
3.3
3.3
3.3
2.5
2.5
0.8
2.5
2.5
0
0
0
0
0
0
3.3
0.1 3.3
3.3
0
A-2
1.6
5.0
0
5.0
5.0
5.0
5.0
5.0
11.8
0.1
0
0.4
0
3.3
0
5.0
0
2.5
2.5
2.5
5.0
0
0
0
3.3
1.6
0.1
2.2
1.7
0
1.7 1.7 1.7
1.7 1.6
A-1
3.3
0.1 0.1
0.1
0
0.1
to DSP_CB562
Page 125 F1
to NET 1/2
to NET 1/2
to NET 1/2
NETWORK
(LAN)
to NET 1/2
PHY CEIVER
AUDIO DAC
DAC for VCXO
IC701 : KSZ8721SL
PHY receiver
Transmitter
NRZ/NRZI
MLT3 Encoder
Clock
Recovery
MII/RMII
Registers
and
Controller
Interface
LED
Driver
4B/5B Encoder
Scrambler
Paraiiei/Serial
10BaseT
Receiver
10/100
Pu/se
Shaper
Adaptive EQ
Base Line
Wander Correction
MLT3 Decoder
NRZI/NRZ
GND
RXDV/PCS_LPBK
GND
GND
VDDC
TXER
TXC/REF_CLK
TXEN
TXD1
TXD2
TXD3
COL/RMII
CRS/RMIII_BTB
VDDIO INT#/PHYAD0
LED0/TEST
LED1/SPD100
LED2/DUPLEX
LED3/NWAYEN
PD#
VDDRX
RX-
RX+
TX+
TX-
FXSD/FXEN
GND
GND
REXT
VDDRCV
GND
GND
VDDTX
GND
XO
XI
VDDPLL
RST#
TXD0
RXC
RXER/ISO
VIDEO
MDIO
MDC
R3D3/PHYAD1
RXD2/PHYAD2
RXD1/PHYAD3
RXD0/PHYAD4
2
3
4
5
6
7
8
10
12
13
15
17
19
21
23
18
20
TXD1
TXD2
TXD3
TXD0
22
24
14
16
11
39
40
41
42
43
44
45
46
47
48
37
36
34
32
30
28
26
31
29
27
25
35
33
38
9
1
RX+
RX-
33
32
TX+
TX-
41
20
19
18
17
14
15
16
22
21
1
2
3
4
5
6
11
9
10
40
PLL
PWRDWN
XI
X0
46
45
4B/5B Decoder
Descrambler
Serial/Parallel
Manchester Decoder
Serial/Parallel
Parallel/Serial
Manchester Encoder
Power
Down or
Saving
Auto
Negotiation
RXD2
RXD1
RXD0
RXC
TXC
COL
CRS
TXER
TXEN
RXER
RXDV
LINK
SPD
COL
FDK
MDIO
MDC
R3D3
IC754 : BH2220FVM-TR
8-bit 3-channel D/A converter
1 AO1
2 AO2
3 AO3
4
8
7
6
5
V
CC
LD
CLK
DI
GND
V
CC
V
CC
V
CC
R-2R
DAC
8bitREG
+
DEC
R-2R
DAC
8bitREG
+
DEC
R-2R
DAC
Power on reset
8bitREG
+
DEC
Serial
Interface
IC752 : NJM4565M
Dual operational amplifier
8
2, 6
3, 5
1, 7
4
V+
–INPUT
+INPUT
V–
OUTPUT
IC753 : SN74LVC3GU04DCTR
Triple inverter gate
1
2
3
4
8
7
6
5
1A
3Y
2A
GND
V
CC
1Y
3A
2Y
(1) Open-drain output for the PCM1782
NOTE: Signal names in parentheses ( ) are for the PCM1781.
Power Supply
Enhanced
Multilevel
Delta-Sigma
Modulator
V
OUT
L
4 /8
Oversampling
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
V
COM
System Clock
AGND
V
CC
ZEROR/ZEROA
(1)
(ZEROA)
ZEROL/NA
(1)
Output Amp
and
Low-Pass Filter
DAC
V
OUT
R
(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
IC751 : PCM1781DBQR
Audio digital-to-analog converter
POINT A-2 Pin 45 of IC701
POINT A-1 Pin 6 of IC753