Yamaha RX-V540 Service Manual page 81

A B
SCHEMATIC DIAGRAM (FUNCTION 1/2)
1
2
3
4
5
6
0.2 0.2
-11.9
-11.9
0 0
MUTE
7
IC301: BD3841FS IC302: BD3815KS
Function Switch Audio Sound Processor
32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17
LOGIC
8
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
F-SW1: INPUT FUNCTION 1
*
F-SW2: INPUT FUNCTION 2
9
C D E
RX-V440/RX-V440RDS/HTR-5640/HTR-5640RDS/DSP-AX440
0.1 0
0 0.1
0 0.1
0 -6.9
0 0
0 7.0
0 0.1 INPUT/
0 0
REC OUT
0 0
SELECTOR
0 0
0 0
0 0
0 0
0 0
0
0
0
0
0
AUDIO
0
SOUND
0
PROCESSOR
0
0
0
0
0
0 7.0
0
0 -6.9
0
IC303: BD3812F-E2
Audio Sound Processor
42 41 40 39 38 37 36 35 34 33 32 31 30 29
TONE
INFRA 43 28 GND8
IN1 1
INFLA 44 27 OUTSW
SW1
+
AGND1 2
A
INSWA 45 – 26 GND7
+
B
–
3
INSRA 46 25 OUTSR IN2
+
A –
B +
INSLA 47 – 24 GND6
AGND2 4
+
INCA 48 A 23 OUTSL
+ – 5
B VEE
–
49 22
INSBA GND5
SW2
+
AGND3 6
A –
50 21
INFRB A + OUTC
B
B –
7
INFLB 51 + 20 GND4 VCC
–
A
A
B +
INSWB 52 19 OUTSB
B –
+
SW3
–
INSRB 53 A 18 VCC
+
B
A
–
+
INSLB 54 B 17 GND3
–
A
INCB 55 B 16 VEE
INSBB 56 15 VDD
LOGIC
1 2 3 4 5 6 7 8 9 10 11 12 13 14
F G
Page 82 D3 Page 78 F1
to FUNCTION (4) to DSP
11.7
0
7.7
0
0
6.8
-6.8
0
-6.8 0
0 0
-6.8
-7.6
-12.0
0
0
0
0
0
MAIN L 0
-11.9
0
0
CENTER
0
0
0
0
0
0
0
0
0 0 0
0.1
0 0 0
0 7.0
0.1
0 0 0
-6.9 0
0 0 REAR L
7.0
0
0.1
0.1
IC305, 306: TC74HC4053AF
Analog Multiplexer/Demultiplexer
INHIBIT VDD
6 16
14 OUT1
+
A 11
–
LEVEL BINARY TO 1-OF-8
13 OUT2
B 10
CONVERTER DECODER WITH INHIBIT
C 9
12
SEL
VSS 8
+
– VEE
7
11 DGND
0X 12 SW
10 1X 13 SW
MUTE
0Y 2 SW
LOGIC
9 DA
1Y 1 SW
0Z SW
5
8
CL
1Z
3
# All voltages are measured with a 10MΩ/V DC electric volt meter.
# 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.
H I
RX-V540/RX-V540RDS/HTR-5650/HTR-5650RDS/DSP-AX540
RX-V440/RX-V440RDS/HTR-5640/HTR-5640RDS/DSP-AX440
Page 83 A7
to OPERATION (1)
11.7
0.1
0.1
0.1
0.1
0.1
0
0
0
0.1
0.1 0
0
0.1 0
0.1
0.1 0
-11.9
0
MUTE
11.7
0
0
0
5.7
1.5K
0
0
-5.6
1.5K
11.7
0.1
0.1
-11.9
IC307: NJM2068MD
IC308, 309: µPC4570G2
Dual OP-Amp.
INPUT STATES OUT 1 1 8 +V
"ON" CHANNNEL (S)
INHIBIT C B A
–IN 2 7 OUT
1
0 0 0 0 0X, 0Y, 0Z
+ – + –
0 0 0 1 1X, 0Y, 0Z
+IN 3 6 –IN
1
0 0 1 0 0X, 1Y, 0Z
0 0 1 1 1X, 1Y, 0Z –V CC 4 5 +IN
0 1 0 0 0X, 0Y, 1Z
14 X-COM
0 1 0 1 1X, 0Y, 1Z
0 1 1 0 0X, 1Y, 1Z
15 Y-COM
0 1 1 1 1X, 1Y, 1Z
1 X X X NONE
4 Z-COM
SW
J K L
Page 83 J4
to OPERATION (4)
Page 88 A5
to POWER (1)
CC
2
2
2
81