Yamaha HTR-4064 Service Manual page 101

A B C
VIDEO 1/3
1
2
COMPONENT
VIDEO
MONITOR
OUT
3
AV 1
4
5 AV 2
6
AV 3
7
AV 4
AV 5
AV 6
8
AV OUT
MONITOR OUT
9
10
D E F
VIDEO (1)
VIDEO DRIVER
0 0
0 -4.9
5.1 0
0 -4.9
5.1 0
0 -4.9
5.1 0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
5.1
0
-4.9
CB301
Page 98 F8
to OPERATION (8)_CB464
(J model)
0
0
0
0
0 0
0
0 0
COMPOSITE
SELECTOR
0
0
0 -4.9
5.0 0
0 0
0 0
0 0
0 0
5.1 0
3.3
0
0
IC305
0
0
IC305
0
0
3.3
G H I
5.1
COMPOSITE
SELECTOR
0 0
-4.9 0
0 0
0 0 0 0
3.3 3.3 3.3 3.3
0 0 0 0 0 0 0 0
-4.9
-4.9 -4.9
5.1 0 5.1 0
IC305
0 0
-4.9
VIDEO DRIVER
to VIDEO 2/3
IC304
IC304
IC304
-0.3
0
0
J K L
IC301: NJM2581M
IC302: TC74HC4051AFEL
Video amplifier
8-channel analog multiplexer/demultiplexer
6dB 75
VIN1 1 14 V+1
AMP Driver
BIAS
NEE1 2 13 VOUT1
A
3 6dB 75
VIN2 Driver 12 V+2
AMP
B
BIAS
VEE2 11 VOUT2
4
6dB 75
VIN3 5 10 V+3
AMP Driver C
BIAS
VEE3 6 9 VOUT3
INH
PowerSave 7 REF 8 GND
4 1
6 2
COM 3
7 4
5 5
INH 6
V EE
GND 8
CB303 CB304
5.1
3.3
3.2
Page 94 E8
0
3.4
to DIGITAL_CB52
3.4
3.4
IC303: TC74HC4053AF
1.0
Analog multiplexer/demultiplexer
1.1
0
-0.3
INHIBIT VCC
6 16
A 11
LEVEL BINARY TO 1-OF-8
B 10 CONVERTER
DECODER WITH INHIBIT
C 9
8
GND
7
VEE
12 SW
0X
13 SW
1X
0Y 2 SW
1Y SW
1
0Z
5
3
CB302
5.1
0
0
0
0
0
0
0
5.0
0
0
0
Page 103 B8
3.3
to VIDEO (2)_CB381
★ All voltages are measured with a 10MΩ/V DC electronic voltmeter.
★ Components having special characteristics are marked
with parts having specifications equal to those originally installed.
★ Schematic diagram is subject to change without notice.
● 電圧は、内部抵抗 10MΩの電圧計で測定したものです。
● 印のある部品は、安全性確保部品を示しています。部品の交換が必要な場合、
パーツリストに記載されている部品を使用してください。
● 本回路図は標準回路図です。改良のため予告なく変更することがあります。
M N
RX-V471/HTR-4064
COM
OUT C IN 0
1
2
3
4
5
6
OUT C IN 7
16 Vcc
15 2
14 1
13 0
12 3
11 A
7 10 B
9 C
INPUT STATES
"ON" CHANNEL (S)
INHIBIT C B A
0 0 0 0 0X, 0Y, 0Z
0 0 0 1 1X, 0Y, 0Z
0 0 1 0 0X, 1Y, 0Z
0 0 1 1 1X, 1Y, 0Z
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
SW
Z-COM
4
SW
IC305: LA73050-TLM-E
6-channel 75-ohm video driver
and must be replaced
101