Yamaha RX-V461 Service Manual page 70

A B C
RX-V461/HTR-6040/RX-V461DAB
DSP 4/6
1
Q Q
3
to DSP 2/6
2
3
DSP 5/6
4
5
T E
L 1 3
6
to DSP 5/6
7
Page 73 F10
to OPERATION (1)_CB202
8
CB408
to DSP 1/6
9
w w w
to DSP 5/6
10
# All voltages are measured with a 10MΩ/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.
70
D E F
7 1 5
6 3
2.6
0
1.7
1.7
3.3
2.4
3.3
2.6
3.3
3.3
3.3
3.3
3.3
0
0.8
0
0
0
9 4 2 2 9 6 5 1 3
1.7 0
1.5
1.7 0
3.3 0
0
3.3 0.8
0.8 3.3
1.5 1.7
0 0
0.4
3.3
BUS SWITCH
4.9
0
0.1 3.3
0 5.2
0
0
4.9
0
4.9
3.3
0
3.3
4.9
0
0
3.3
x a o
. i
G H
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1 5
0
A/D SELECTOR
0
0
0
0.8
*
0
to DSP 6/6
A/D SELECTOR
* Destination for A/D port
R416 [ohm]
Q Q
3
R410 [ohm]
4ch ADC
DEST (1 pin) [V]
A/D value (3.3 V=255)
Destination
3.3
IC401
3.3
3.3
0.1
0 3.3
0.8 3.3
1.7 3.3
to DSP 2/6
to DSP 2/6
0.1
0
u 1 6 3
y
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I J K
2 4
8 9
6.8 k 8.2 k 8.2 k
7 6 3 1 5 1 5 0 8
5.6 k 2.2 k 1.0 k
1.3-1.7 0.5-0.9 0.2-0.5
100-132 42-69 16-41
T B G, E
to DSP 5/6
IC402, 403: SN74LV4051APWR
8-channel analog multiplxers/demultiplexers
to DSP 6/6
11
A
10
B
m
9
C
to DSP 1/6, 2/6
c o
6
. INH
INPUTS ON
Y4 1 16 V
CC
INH C B A CHANNEL
Y6 2 15 Y2
L L L L Y0
COM 3 14
Y1
L L L H Y1
4
Y7 13 Y0
L L H L Y2
Y5 5 12 Y3
L L H H Y3
INH 6 11
A
L H L L Y4
GND 7 10 B
L H L H Y5
GND 8 9 C
L H H L Y6
L H H H Y7
H X X X None
L M N
2
9 IC401: ADC084S021 CIMM 8 9 9
4-channel, 200 ksps, 8-bit A/D converter
IN1
8-Bit V A
IN2
CS 1 10 SCLK
SUCCESSIVE
MUX T/H
IN3
APPROXIMATION V A 2 9 DOUT
GND
ADC
ADC084S021
GND 3 8 DIN
GND
IN4
IN4 4 7 IN1
IN3 5 6 IN2
SCLK
CS
CONTROL
LOGIC DIN
DOUT
9 2 4 9 8 2 9 9
to DSP 5/6
to DSP 6/6
3
COM
13
Y0
14
Y1
15
Y2
12
Y3
IC404: SN74AHCT245PWR
Octal bus transceivers with 3-state outputs
1
Y4
5
Y5
1
DIR 1 20 V
2 DIR CC
Y6
A1 2 19 OE
4 19
Y7 OE
A2 B1
3 18
A3 4 17 B2
2
A1
A4 5 16 B3
A5 6 15 B4
18
B1
A6 7 14 B5
A7 8 13 B6
9 12
A8 B7
To Seven Other Channels
GND 10 11 B8