Yamaha RX-V740, Service Manual

Page: 85 / 152

A B C D E F G H I J K L
RX-V740/RX-V740RDS/DSP-AX740
RX-V640/RX-V640RDS/HTR-5660/DSP-AX640/DSP-AX640SE
85
1
2
3
4
5
6
7
8
9
SCHEMATIC DIAGRAM (FUNCTION 2/2)
IC707, 709, 822: TC74HC4053AF
Analog Multiplexer/Demultiplexer
16
VDD
6
INHIBIT
11
15
14
9
A
C
B
8
VSS
7 VEE
12 0X
13 1X
2
0Y
1
1Y
5
0Z
3 1Z
LEVEL
CONVERTER
10
BINARY TO 1-OF-8
DECODER WITH INHIBIT
SW
SW
SW
SW
SW
SW
4 Z-COM
X-COM
Y-COM
INPUT STATES
INHIBIT
0
0
0
0
0
0
0
0
1
"ON" CHANNNEL (S)
0X, 0Y, 0Z
1X, 0Y, 0Z
0X, 1Y, 0Z
1X, 1Y, 0Z
0X, 0Y, 1Z
1X, 0Y, 1Z
0X, 1Y, 1Z
1X, 1Y, 1Z
NONE
C
0
0
0
0
1
1
1
1
X
B
0
0
1
1
0
0
1
1
X
A
0
1
0
1
0
1
0
1
X
IC602: NJM78L05A-T3
Voltage Regulator
INPUT
OUTPUT
GND
IC603: LC72722
RDS Decoder
+
REFERENCE
VOLTAGE
57kHz
bpf
(SCF)
CCB
TEST
PLL
(57kHz)
ANTIALIASING
FILTER
SMOOTHING
FILTER
RAM
(24 BLOCK DATA)
ERROR CORRECTION
(SOFT DECISION)
SYNC/EC
CONTROLLER
SYNC
DETECT-1
DATA
DECODER
CLOCK
RECOVERY
(1187.5Hz)
MEMORY
CONTROL
OSC/DIVIDER
VREF
CLK(4.332MHz)
SYNC
DETECT-2
VDDA
VSSD
VDDD
RDS-ID
SYNC
SYR
VSSA
MPX IN
DO
CL
DI
CE
T1
T2
T3
T4
T5 T6 T7
X IN
VREF FL OUT C IN
X OUT
3 14
15
19
18
24
1 5 6
4
2
20
21
22
23
7
8
9
10
11 16 17 13 12
IC705, 706: TK15420M
Video Amp
– +
1
2
3
4 5
– +
6
7
8 OUT A
–IN A
+IN A
VEE
VCC
OUT B
–IN B
+IN B
IC701, 702, 801: TC74HC4051AFEL
Analog Multiplexer/Demultiplexer
16
VCC
6
INHIBIT
11
3
9
A
C
B
8
GND
7
VEE
13 0
14 1
15
2
12
3
1
4
5
5
LEVEL
CONVERTER
10
BINARY TO 1-OF-8
DECODER WITH INHIBIT
SW
SW
SW
SW
SW
SW
2
6
4 7
SW
SW
COM
INPUT STATES
INHIBIT
0
0
0
0
0
0
0
0
1
"ON" CHANNNEL
0
1
2
3
4
5
6
7
NONE
C
0
0
0
0
1
1
1
1
X
B
0
0
1
1
0
0
1
1
X
A
0
1
0
1
0
1
0
1
X
IC703: LA7109
75
Ω
Video Driver
35
VOUT1
33 VOUT2
31 VOUT3
30 MUTE4
29 -VCC4
32 DR CTL2
36
+VCC1
34
GND
2 NFB1
4 VIN2+
6 -VCC1
7
VIN3+
8
NFB3
28
N.C.
27
N.C.
26 +VCC2
9 N.C.
10 N.C.
11 VIN4+
5 NFB2
1
VIN1+
3 MUTE1
DR 6dB
DR 6dB
DR 6dB
25 VOUT4
23 VOUT5
21 VOUT6
20 MUTE3
19 -VCC3
22 DR CTL1
26
24
GND
12 NFB4
14 VIN5+
16
-VCC2
17
VIN6+
18
NFB6
15 NFB5
11
13 MUTE2
DR 6dB
DR 6dB
DR 6dB
IC708: TC74HCU04AF
Hex Inverters
1A
1Y
2Y
VCC
6A
1
2
3
4 11
2A 6Y
5A
12
13
14
3A
3Y
5Y
4A
5
6
7 4Y 8
9
10
GND
15 VOUT1
13 VOUT2
11 VOUT3
10
MUTE3
9
-VCC2
12 MUTE2
16 +VCC
14 GND
2
NFB1
4 VIN2+
6 -VCC1
7 VIN3+
8 NFB3
5 NFB2
1 VIN1+
3 MUTE1
DR 6dB
DR 6dB
DR 6dB
IC802: LA7108M
Video Amp IC821: LA7104M
Video Amp
15 VOUT1
13 VOUT2
11
VOUT3
10 MUTE2
9 -VCC2
12 DR CTL
16 +VCC
14
GND
2 NFB1
4 VIN2+
6 -VCC1
7
VIN3+
8
NFB3
5 NFB2
1 VIN1+
3 MUTE1
DR 6dB
DR 6dB
DR 6dB
INPUT
SELECTOR
Y-INPUT SELECTOR
Y/C MIX
VIDEO DRIVER
C-INPUT
SELECTOR
S-SIGNAL DETECTOR
MICRO COMPUTER
★
All voltages are measured with a 10M
Ω
/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.
Point
3
Pin 12 of IC603 Point
4
Pin 13 of IC601
Point
5
Emitter of Q601 and collector of Q602
POWER ON
(Connect the power cord)
POWER OFF
(Disconnect the power cord)
A
B
Q601 E
Q602 C
Page 88
to OPERATION (1)
G8 Page 81
to DSP
E1
P
age 91
to MAIN (1)
E1
P
age 91
to MAIN (2)
F6
Page 90
to VIDEO
D1 Page 84
to FUNCTION (1)
E2 Page 84
to FUNCTION (1)
F2
x: NOT USED
O: USED / APPLICABLE
3
5
6
8
1
2
13
12
11
10
15
3
3
2
6
5
8
7
1
1
7
8
4
3
2
6
5
RX-V640/RX-V640RDS/HTR-5660/DSP-AX640
Y SELECTOR
Cb SELECTOR
Cr SELECTOR
3
4
A
5
B
4.9
4.9
0
4.9 4.5 4.9 0.3 0.9 4.9
0
4.7
0
4.9 4.9
0
0.9 4.9 4.9 4.9
4.9
4.9
4.9
0.9
0
4.8 4.9 2.4
0
2.3 4.9 4.5
0.1
0
0.2
0
0
0.1
4.9
4.9
0
0
4.9
0
4.9
4.9
4.9
4.9
4.9
4.2
0.9
4.9
4.9
4.9 4.9
4.9
0 0 0 0 0
4.9
0
4.9 4.9
0
4.9 4.9 4.9 4.9 4.9 4.9 4.9
0
0.2
0
4.8
4.9
4.9
0
0
0
4.9
4.8
4.9
0
0
0
0
4.9
0.7
1.0
4.8
4.9
0
4.9
0
1.9
4.9
4.9
4.9
1.9
0
0
0
4.7
13.2
12.5
0.6
4.9
4.7
4.9 4.9
7.5
7.5
0
7.0
13.1
4.9 13.2
0.6
0
0
0
0
0
4.9
0
0
0
-11.9
4.9
4.9
-11.9
4.9
4.9
-11.9
4.9
4.9
-11.9
4.9
4.9
-11.9
4.9
4.9
11.7
5.6
5.0
0.6
2.3
11.7
2.9
0
2.3 2.3 4.5
0
2.3
2.2
0 0
2.0
1.8 4.9
0 0 0 0
5.0
4.9
0
0 0 0 0
4.9
0
4.9
0 0 0
0
-4.9
0
0
-4.9
4.9
0
0
4.9
0
0
0
4.9
0
0
0
4.9
-4.9
0
2.6
0
0.1
0
0
0
0 0 0
0
0
0
0
0
0
4.9
4.9
4.9
4.9
4.4
-0.3
0.9
4.9
4.2
-1.8
4.2
-0.1
-0.4
4.2
2.6
2.6 2.6
4.9
1.0
1.3
4.9
-0.6
1.7
1.0
1.0
0
4.9
1.0
1.0
0.5
0.5
0
0
0
0
0
0
0
0 0
0
4.9
0.2
4.9
0.9
1.0
1.0
-0.6
0.9
0 0
4.9
4.9
0 0 0 0 0 0 0
0 0 0 0 0 0
-4.9
0
4.9
0 0 0 0 0 0 0
0 0 0 0 0 0
-4.9
0
0 0
0
-4.8
1.0
-4.8
4.9
-4.8
0.1
0
0.1
4.8
-4.8
-4.8
-4.8
0
4.8
0
0
0
4.8
0
4.8
0
0
0
0
0
-4.8
-4.8
-4.8
-4.8
0
0
0
0
0
0
0
0
0 0
0
0
0
0
0
0
0
0 0
0
0
0
4.9
-4.8
4.4 0
-4.8
0 4.9
4.9
4.4
5.0
5.0
5.0
5.0
-4.9
-4.9
-4.9
-4.9
0
0
0.6
4.9
4.9
0
0
0
4.9
0
0
0
0
0
0
0
0
0
0
0
0
0
4.9
4.9
-4.9
0
0
GND
VOUT3
V+3
VOUT2
V+2
VOUT1
V+1
NJM2581M
PS
VEE3
VIN3
VEE2
VIN2
VEE1
VIN1
Note: IC821 LA7104M for P.W.B. A to D version.
NJM2581M for P.W.B. E or later version.