Yamaha RX-V461 Service Manual page 77

A B C
VIDEO 1/2
1
Q Q
7
3
0 0
-0.5
4.9
2 0 0
0 INPUT SELECTOR
0
0 0
0 0
0
0
5.0 0
JK301
JK302
0 0
4.9 -5.0
0 0
0 0
0 0
3
0 0
0 0
5.0 0
INPUT
SELECTOR
S VIDEO
JK303
4
5
T E
L 1 3 9 4
6
7
8
9
IC301, 302, 322: MM74HC4051SJX
8-channel analog multiplexer
POINT 4 Pin 3 of IC342
CHANNEL IN/OUT
VCC Y7 Y6 Y5 Y4 Y3 Y2 Y1
16 4 2 5 1 12 15 14
w w w
11
A
.
Binary
B 10
to
Logic 1 of 8
Level Decoder
Conversion with
10
C 9 INHIBIT
INH 6
8 7
GND VEE
D E F
Page 71 B7
1 5 1
6 3
to DSP_CB504
VIDEO
CB306
2 2 9 6 5 1 3
CB307
VIDEO (1)
IC343: MM74HC4053SJX
Triple 2-channel analog multiplexer
IN/OUT
Y0 VCC CY CX BY BX AY AX
13 16 3 5 1 2 13 12
TG
x Logic Binary to a o
TG
TG Level 1 of 2 y OUT/IN
A 11 Conversion Decoders 14
AX or AY
with TG
TG
INHIBIT
i Logic
TG
COMMON 10 Level Binary to TG
3 B OUT/IN
OUT/IN Conversion 15
1 of 2 BX or BY
TG
Decoders TG
Logic with
TG
C 9 Level INHIBIT
TG
Conversion OUT/IN
4
TG Binary to
CX or CY
1 of 2 TG
Logic Decoders
TG INH 6
Level
with
Conversion
INHIBIT
8 7
GND VEE
G H
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5
0
Page 76 K4
to MAIN (4)_CB193
INPUT SELECTOR
0 0
0 -5.0
0 0
0 0
0 0
0 0
0 0
5.0 0
INPUT
SELECTOR
0 5.0
0.1
0
0 0
OUTPUT
0 0.1
0 0.1
AMPLIFIER
0 0
0.6
4.9
0
0 5.0
-5.0
0
-5.0
0 5.0
0
-5.0
0 5.0
0
-5.0
1.5
Q Q
3 7 6
0.6 0.6
0 5.0
0 0 4.9 0
0
0
0 4.9 4.9
0 0
0 0
4.9 4.9
-5.0 0.6
0 4.9
1.5
0
-5.0
0
0
INPUT
-10.8
SELECTOR
VIDEO (2)
IC344: LA73050-TLM-E
6-channel 75-ohm video driver
IC323: KIA79M05PI-U
Voltage regulator
-5V
R7
1.4K
Q8
R18 R19
Q7 4K
5K
R6
7K
u 1 Q10 6 3
Q9
D1 D2
R5
6.2V 6.2V R17
15K
Q11 .
5.4K
Q12
Q6 Q17
Q2 V
OUT
Q16 Q18
R10 Q19 D3
6.2V
3K R11
R15
10K
2K
Q1
Q13
R20
R12 R14
10pF
20K
20pF 600 15K
Q4
Q3 Q5 R4
20K Q14 Q15 Q20
Q21
R8 R9 R13 R21
R1 R2 R3 R16
20K 20K 5K 150
0.05
750 1K 6K
V
IN
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I J K
2 4
8 9 9
Page 79 M8
to HDMI_CB906 (T, G, E models)
W3201
OSD
4
CB321 IC342
W3401
CB341
0
IC344
0
3.3
0
0
3.3
0
IC344
0
0
0 IC344
3.3
0
0
3.3
0
IC344
0
CB342
3 1 5 1 5 0 8 9 2
0
0 IC344
3.3
0
0
CB343 3.3
0
IC344
0
CB322
Page 76 F3
to MAIN (1)_W161
IC342: LC74782JM-8A16-TLM
MF40310 MF40310 The on-screen display controller LSI
3P 100mm 3P 100mm
9 Serial
11 parallel
converter
10
23
IC321: NJM2581M
24
Video amplifier
1
6dB 75
VIN1 1 Driver 14 V+1
AMP
12
BIAS 8
NEE1 2 VOUT1
13
6dB 75
VIN2 3 12 V+2
AMP Driver
Horizontal
6
character
BIAS
VEE2 4 m 11 VOUT2 size
7
register
6dB 75
VIN3 5 Driver 10 V+3
AMP 17
c o Horizontal
character
18
BIAS size
VEE3 6 9 VOUT3
register
19
20
PowerSave 7 REF 8 GND
22
L M N
RX-V461/HTR-6040/RX-V461DAB
2
8 9 9
5.0
1.7
1.0
4.9 0
4.9 -5.0
4.9 0
0 0
0 0
0
0
0 0
4.9 0
OUTPUT AMPLIFIER
4 9 8 2 9 9
IC344
VIDEO (3)
IC324, 325: TC74HC4052AF
Analog multiplexer/demultiplexer
INH VCC
6 16
A 10 LEVEL BINARY TO 1-OF-4
B CONVERTER DECODER WITH INHIBIT
9
GND 8
VEE 7
0X 12 SW
1X 14 SW
13 X-COM
2X SW
15
3X 11 SW
0Y
1 SW INHIBIT B A
0 0 0 0x, 0y
1Y 5 SW
Y-COM
3 0 0 1 1x, 1y
2Y 2 SW
0 1 0 2x, 2y
3Y 4 SW 0 1 1 3x, 3y
1 X X NONE
8-bits
latch
+
command
Horizontal
decoder Vertical Horizontal Vertical 31 inking Display RAM write
character character display display 3rd inversion control address
size size position position control register counter
register register register register register
31 inking
Horizontal Vertical
Horizontal Vertical 3rd inversion
size size Display RAM
dot counter dot counter
counter counter control
register
31 inking 31 inking
3rd inversion 3rd inversion
control control VSS1 1 24 VDD1
register register
Xtal 2 23
IN RST
3 22
Xtal OUT CTRL3
Character Line Decoder
4 21
control control CTAL1 CTRL2
counter counter
BLANK 5 20 SEP IN
Horizontal
character OSCIN 6 19 SEP OUT
Font RAM
size
register OSC OUT 7 18 SEPC
CHARA 8 17 SYN
IN
Character output Shift CS 9 16 VDD1
Timing generator Synchronization
control register
signal generator
Back ground control SCLK 10 15 CV
Horizontal IN
Video output control
character
SIN 11 14 NC
size
register VDD2 12 13
CV OUT
21 4 2 3 5 15 13
# All voltages are measured with a 10MΩ/V DC electronic voltmeter.
# 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.
77