Yamaha RX-V671 Service Manual page 143

A B C
RX-V671/HTR-6064/RX-A710
VIDEO 1/3
1
CB301
2
AV 1
COMPONENT
3
VIDEO
AV 2
4
AV 3
VIDEO
AV 4
5
AV 5
AV 6
AV OUT
6
7
8
COMPONENT
VIDEO
9
MONITOR OUT
VIDEO
10
144
D E F
IC301
IC301
IC305
W3001
IC305
G H I
IC310
IC310
IC310
IC305
IC302
IC301
J K L
to VIDEO 2/3
IC301-303: TC74HC4053AF
Analog multiplexer/demultiplexer
INHIBIT
A 11
B 10
C 9
8
GND
VEE 7
12
0X
13
1X
2
0Y
1Y 1
0Z 5
3
IC305: LA73050-TLM-E
6-channel 75-ohm video driver
CB302
Page 138 I10
to OPERATION (2)_CB455
IC307: TC74HC4051AFEL
8-channel analog multiplexer/demultiplexer
A
B
C
INH
IC308: LC709004A-TLM-E
I/O-expander for microcontroller
DIN 2 Serial/parallel converter/shift register
CLK#
3
CS# 4
RES# 21
port 0 I/O buffer
24
Page 128 B1
to DIGITAL (1)_CB21
CB303
VIDEO (1)
M N
VCC
6 16
INPUT STATES
"ON" CHANNEL (S)
LEVEL BINARY TO 1-OF-8
INHIBIT C B A
CONVERTER
DECODER WITH INHIBIT
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
SW
14 X-COM 0 1 0 0 0X, 0Y, 1Z
SW
0 1 0 1 1X, 0Y, 1Z
SW
0 1 1 0 0X, 1Y, 1Z
Y-COM
15
0 1 1 1 1X, 1Y, 1Z
SW
1 X X X NONE
SW
Z-COM
4
SW
IC306: NJM2581M
Video amplifier
75
VIN1 1 6dB V+1
AMP Driver 14
BIAS
NEE1 2 13 VOUT1
6dB 75
VIN2 3 Driver 12 V+2
AMP
BIAS
VEE2 4 11 VOUT2
75
VIN3 5 6dB 10 V+3
AMP Driver
BIAS
VEE3 6 9 VOUT3
7 REF
PowerSave 8 GND
COM
OUT C IN 0
1
4 1 16 Vcc
2
6 2 15 2
3
COM 3 14 1
4
7 4 13 0
5 5 5 12 3
6 INH 6 11 A
V EE 7 10 B
OUT C IN 7
GND 8 9 C
IC310: FHP3350IM14X
Triple voltage feedback amplifier
NC or DISABLE1
1 14 OUT2
14 DOUT
2
NC or DISABLE2 13 -IN2
15 VDD
NC or DISABLE3 3 12
+IN2
19 VSS
+Vs 4 11 -Vs
+IN1 5
10 +IN3
-IN1 6 9 -IN3
I/O control/output register
OUT1 7 8 OUT3
port 1 I/O buffer
17 15 8
★ All voltages are measured with a 10MΩ/V DC electronic voltmeter.
★ Components having special characteristics are marked
and must be replaced
with parts having specifications equal to those originally installed.
★ Schematic diagram is subject to change without notice.