Yamaha rx-v561 Service Manual page 64

A B C
RX-V561/HTR-6050
DSP 4/6
1
to DSP 2/6
2
3
DSP 5/6
4
5
6
to DSP 5/6
7
Page 67 F10
to OPERATION (1)_CB202
8
CB408
to DSP 1/6
9
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.
64
D E F
2.6
A/D SELECTOR
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
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
0.1
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
G H
to DSP 3/6
0
0
0
0.8
*
0
to DSP 6/6
A/D SELECTOR
* Destination for A/D port
R416 [ohm]
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
I J K
5.6 k
22 k
2.5-2.8
190-215
U, C
IC402, 403: SN74LV4051APWR
8-channel analog multiplxers/demultiplexers
to DSP 6/6
13
14
11
A
15
12
10
B
9
C
to DSP 1/6, 2/6
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
IC401: ADC084S021 CIMM
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
to DSP 5/6
3
COM
Y0
Y1
Y2
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