Yamaha HTR-6230, Service Manual

Page: 76 / 99

★
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.
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-V365/HTR-6230
76
DSP 4/6
IC402
IC401
IC403
CB408
IC404
0
3.4
3.4
0
0.2
0
0
1.7
0
0.8
0
5.0
3.4
3.4
0.6
0
0.2
3.3
3.3
0.5
0.6
0.6
0
3.4
0.2
5.0
5.0
0.2
5.0
0
3.3 0
0
0
3.4
5.1
1.7
3.4
2.9
1.7
3.3
3.4
0.8
1.1
3.4
0.2
3.3
0.6
3.3
3.4
3.3
3.3
0
0
0
0.9
0
1.8
1.2
3.3
1.7
3.3
3.4
3.3
3.3
3.4
3.3
3.4
3.4
1.8
1.7
0
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 multiplexers/demultiplexers
IC401 : ADC084S021 CIMM
4-channel, 200 ksps, 8-bit A/D converter
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
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
to DSP 1/6
to DSP 5/6
to DSP 5/6
to DSP 1/6, 2/6
to DSP 2/6
to DSP 6/6
to DSP 5/6
B, G, E, F models
to DSP 6/6
to DSP 5/6
to DSP 2/6
to DSP 6/6
to DSP 2/6
4ch ADC
BUS SWITCH
A/D SELECTOR
A/D SELECTOR
to DSP 5/6
*
R406 [ohm]
R407 [ohm]
DEST (1 pin) [V]
A/D value (3.3 V=255)
Destination
1.5 k
8.2 k
2.6-3.0
206-226
U, C
3.3 k
6.8 k
2.0-2.4
162-182
R, L
4.7 k
5.6 k
1.6-2.0
129-149
T
6.8 k
3.9 k
1.0-1.4
83-103
K, A
8.2 k
2.2 k
0.5-0.9
44-64
B, G, E, F
*
Destination for A/D port
to OPERATION (1)_CB202
Page 79 F10