Yamaha RX-V461 - AV Receiver, Service Manual

Page: 45 / 57

CB408
IC404
IC403
IC402
IC401
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-V461/HTR-6040/DSP-AX461
72
★
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.
DSP 4/6
2.6
0
3.3
3.3
3.3
0.8
0
0
0
0
0
1.5
1.7
1.7
1.7
3.3
3.3
3.3
3.3
3.3
3.3
3.3
5.2
3.3
3.3
3.3
1.7
1.7
3.3
3.3
3.3
0.8
1.5
0
0
0
0
0
0.8
3.3
0.4
1.7
0
0
*
0
0.2
0.2
0
0.8
3.3
0.1
3.3
3.3
3.3
4.9
4.9
4.9
4.9
2.4
2.6
0
0
0
0
0.1
0
0
0
0
0
0
0.1
0.8
IC404 : SN74AHCT245PWR
Octal bus transceivers with 3-state outputs
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
DIR
A1
A2
A3
A4
A5
A6
A7
A8
GND
V
CC
OE
B1
B2
B3
B4
B5
B6
B7
B8
DIR
OE
A1
B1
To Seven Other Channels
1
2
19
18
IC402, 403 : SN74LV4051APWR
8-channel analog multiplxers/demultiplexers
IC401 : ADC084S021 CIMM
4-channel, 200 ksps, 8-bit A/D converter
IN1
IN2
IN3
MUX T/H
VA 8-Bit
SUCCESSIVE
APPROXIMATION
ADC
GND
IN4
GND
SCLK
CONTROL
LOGIC
CS
DIN
DOUT
CS 1
VA 2
GND 3
IN4 4
IN3 5
SCLK
ADC084S021
10
DOUT 9
DIN 8
IN1 7
IN2 6
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Y7
COM
INH
C
B
A
11
10
9
6
3
13
14
15
12
1
5
2
4
1
2
3
4
5
6
7
8 9
10
16
15
14
13
12
11
Y4
Y6
COM
Y7
Y5
INH
GND
GND
VCC
Y2
Y1
Y0
Y3
A
B
C
INPUTS ON
CHANNEL
INH
L
L
L
L
L
L
L
L
H
L
L
L
H
H
H
H
X
C
L
L
H
H
L
L
H
H
X
L
H
L
H
L
H
L
H
X
L
Y1
Y2
Y3
Y4
Y5
Y6
Y7
None
Y0
B A
to DSP 3/6
to DSP 2/6
to DSP 2/6
to DSP 1/6
to DSP 5/6
DSP 5/6
to DSP 6/6
to DSP 5/6
to DSP 2/6
to DSP 5/6
to DSP 6/6
to DSP 1/6, 2/6
4ch ADC
A/D SELECTOR
A/D SELECTOR
BUS SWITCH
3.3 k
4.7 k
1.8-2.1
133-163
L
R416 [ohm]
R410 [ohm]
DEST2 (2 pin) [V]
A/D value (3.3 V=255)
Destination
1.5 k
3.3 k
2.1-2.4
164-189
J
5.6 k
22 k
2.5-2.8
190-215
U, C
1.0 k
8.2 k
2.8-3.1
216-239
R
6.8 k
3.3 k
1.0-1.3
70-99
K
100 k
(open)
3.1-3.3
240-255
A
*
Destination for A/D port
to OPERATION (1)_CB202
Page 75 F10