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
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
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
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 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
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
P
age 91
to MAIN (1)
E1
P
age 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
4.9
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
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
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
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
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.
