ABCDEFGH I JKL
RX-V740/RX-V740RDS/DSP-AX740
RX-V640/RX-V640RDS/HTR-5660/DSP-AX640/DSP-AX640SE
87
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
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
75Ω 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
DR6dB
DR6dB
DR6dB
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
DR6dB
DR6dB
DR6dB
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
4Y8
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
DR6dB
DR6dB
DR6dB
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
DR6dB
DR6dB
DR6dB
Y SELECTOR
Cb SELECTOR
Cr SELECTOR
INPUT
SELECTOR
Y-INPUT SELECTOR
Y/C MIX
VIDEO DRIVER
C-INPUT
SELECTOR
S-SIGNAL DETECTOR
MICRO COMPUTER
★ 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.
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 89
to OPERATION (1)
G8 Page 81
to DSP
E1
Page 91
to MAIN (1)
E1 Page 91
to MAIN (2)
F6
Page 86
to FUNCTION (1)
E2 Page 86
to FUNCTION (1)
F2
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
DSP-AX640SE
4
A
5
B
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
4.913.2
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
4.90
0
0
0
0
4.9
0
4.9
0
0
0
0-4.9
00
-4.9
4.9
0
0
4.9
0
0
0
4.9
0
0
0
4.9
-4.9
0
0
0
0
0.6
4.9
4.9
0
0
0
0
0
0
0
0
0
4.9
4.9
-4.9
0
2.6
0
0.1
0
0
0
00 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
2.62.6
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
00
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
00
0
0
0
0
0
0
0
00
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
4.9
0
0
0
0
0
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.
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