Yamaha RX-V740 Service Manual page 86

A B
RX-V740/RX-V740RDS/DSP-AX740
RX-V640/RX-V640RDS/HTR-5660/DSP-AX640/DSP-AX640SE
SCHEMATIC DIAGRAM (FUNCTION 1/2)
1
2
3
4
5
6
7
# All voltages are measured with a 10MΩ/V DC electric volt meter.
8
# 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.
9
86
C D E
DSP-AX640SE
Page 87 D4
to FUNCTION (4)
MAIN L
0 0
0 0
0 0
0 0
INPUT L
0 0
INPUT L
0 0
0 0
0 0
0 0
0 0
0 0
0 -5.6
0 0
0 5.6
0 0
0 0
0 0
CENTER
0 0
0 0
0
0 0
0 0 0 0
0 0
0 0
0 0
INPUT/
0
REC OUT 0
0
SELECTOR
REAR L
0
0
0
0
0 0
5.6
0
0
-5.6
5.6 5.6
0
0 0
-5.6
IC301: BD3841FS
Function Switch
32 31 30 29 28 27 26 25 24 23 22 21 20
LOGIC
F-SW1: INPUT FUNCTION 1
F-SW2: INPUT FUNCTION 2
1 2 3 4 5 6 7 8 9 10 11 12 13
F G
Page 87 E4
to FUNCTION (4)
11.8
0 0
0 3 8
0 0
1
0 2
0
ELECTRIC
VOLUME
2.6 0
2.6 2.6
0 2.6
2.5 2.6
0 6 2.6 5.1
7
0 0
0 5
0 0 0
4 4.9 0
0 0
0 2.4
-12.0
4.2 4.9
0 0
0 0
0 0
0 0
0 0
2.5 0
2.2 2.6
0 2.6
2.5 2.6
2.6 5.1
0 0
0 0
0 0
4.9 0
0 0
0 2.4
0 0
4.7 4.9
0
0
11.8
0 3 8
1
0 2
0
2.6 0
2.6 2.6
0 2.6
2.6 2.6
2.6 5.1
0 6
7 0 0
0 5 0
4.9 0
4
0 2.4
-12.0
4.9 4.9
0
0
11.8
2.6 0
0 3
8
1 2.6 2.6
0 2
0 0 2.6
2.6 2.6
2.6 5.1
0 0
4.9 0
0 2.4
4.9 4.9
0 6
0
7 0
0
5 0
4
5.1 11.9
-12.0
5.1
5.7
5.7
5.7
0
5.6 5.6
5.6 5.6 5.6 5.6 5.6
5.6 5.6
0 0 0 0 0 0
-5.6 -5.6 -5.6
IC302, 303: TC74HC4052AF
Analog Multiplexer/Demultiplexer
INH VCC
6 16
INHIBIT B
19 18 17
0 0
A LEVEL BINARY TO 1-OF-4 0 0
10
B CONVERTER DECODER WITH INHIBIT 0 1
9
GND 0 1
8
VEE 1 X
7
0X
12 SW
1X 14 SW
13 X-COM
2X 15 SW
3X 11 SW
0Y 1 SW
1Y SW
5
3 Y-COM
2Y 2 SW
3Y 4 SW
14 15 16
H I
Page 81 F1 Page 89 A6
to DSP to OPERATION (6)
MUTE
0
0 0
-11.9
11.8
0 0 6
8 0
7
0 5
0
0
0 3
1 -11.9
0
2 0 0
4
0
-12.0
MUTE
0
0
0
-11.9
0
0 0
0
0
0 0
-11.9
0
0
MUTE
0 0
0
0 -11.9
0
0
0
0
0
11.8
0 3 8
1 -11.9
0
2 0
0
0 6
7
0 5 0
4
0
-12.0
-11.9 -11.9
0
11.8
0 3 8
1
MUTE
0 2
0
5.6
0 6
7
0 5 0 5.6 5.6 5.6 5.6 0 0 SHIFT
4
REGISTER
-12.0
0 5.6 5.6 0 5.6 5.6
0
11.8
0 5 8
7
0 6
0
0 2
1
0 3 0
4
-12.0
5.6 5.6 5.6 5.6
5.6 0 5.6 0
0 0 0 0
-5.6 -5.6
IC304, 305, 319, 320: TC74HC4053AF
Analog Multiplexer/Demultiplexer
INHIBIT VDD
6 16
INPUT STATES
A
INHIBIT
0 0x, 0y
A
11
1 1x, 1y 0
LEVEL BINARY TO 1-OF-8
B 10
0 2x, 2y CONVERTER DECODER WITH INHIBIT 0
1 3x, 3y C 9 0
X NONE
VSS 8 0
VEE 0
7
0
0X 12 SW
14 X-COM
0
1X 13 SW
0
0Y SW
2
1
15 Y-COM
1Y SW
1
0Z SW
5
4 Z-COM
1Z SW
3
J K
Page 89 C3
to OPERATION (4)
IC312, 313, 315: NJM2068MD
IC314, 316~318: µPC4570G2
Dual OP-Amp.
OUT 1 1 8 +V CC
–IN 2 7 OUT
1 2
+ – + –
+IN 3 6 –IN
1 2
–V CC 4 5 +IN 2
0
IC310: TC74HC164AF
0 8-Bit Shift Register
CK 8
SERIAL INPUT A 1
SERIAL INPUT B 2
D CK
R
Q Q
3 QA
D CK
R
Q Q
4 QB
D CK
R
Q Q
5 QC
D CK
R
Q Q
6 QD
CLR 9
D CK
R
Q Q
10 QE
D CK
R
Q Q
11 QF
5.6
D CK
R
Q Q
0
12 QG
0
D CK
R
Q Q
-5.6 13 QH
IC306~309: YAC520-EE2
Stereo Digital Volume Controller
VREF
+
–
LIN2 12
LIN1 11 9 LOUT
Vref
Generator
256 &
"ON" CHANNNEL (S) VREF
C 8
B A Reset
pulse
0 0 0 0X, 0Y, 0Z Generator
0 0 1 1X, 0Y, 0Z DVSS 4 Reset ICN
L 17
0 1 0 0X, 1Y, 0Z DVDD 3 16 TE
18 ZCEN
0 1 1 1X, 1Y, 0Z
Zero Cross Control
1 0 0 0X, 0Y, 1Z 2 SDATAO
AVSS 13 Detection Register
1 0 1 1X, 0Y, 1Z 20 SDATAI
AVDD 6 R S/P
16
Register CSN
19
1 1 0 0X, 1Y, 1Z
1 SCLK
1 1 1 1X, 1Y, 1Z
256
X X X NONE
RIN1 15 7 ROUT
RIN2 14
VREF
L