Yamaha RX-V461 Service Manual page 52

A B C
VIDEO 1/2
1
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
INPUT SELECTOR
6
D4 VIDEO
7
INPUT SELECTOR
8
J model
9
IC301, 302, 322: MM74HC4051SJX
8-channel analog multiplexer
CHANNEL IN/OUT
VCC Y7 Y6 Y5 Y4 Y3 Y2 Y1 Y0
16 4 2 5 1 12 15 14 13
TG
TG
11
A
TG
Binary TG
B 10 COMMON
to 3
OUT/IN
Logic 1 of 8
TG
Level Decoder
Conversion with
10 TG
C 9 INHIBIT
TG
INH 6 TG
8 7
GND VEE
D E F
Page 73 B7
to DSP_CB504
VIDEO
CB306
OUTPUT
AMPLIFIER
CB307
VIDEO (1)
IC323: KIA79M05PI
Voltage regulator
IC343: MM74HC4053SJX
Triple 2-channel analog multiplexer
IN/OUT
VCC CY CX BY BX AY AX
16 3 5 1 2 13 12
Logic Binary to
TG
Level 1 of 2 OUT/IN
A 11 Conversion Decoders 14
AX or AY D1 D2
with TG
INHIBIT 6.2V 6.2V
Logic
10 Level Binary to TG
B OUT/IN
Conversion 15
1 of 2 BX or BY
Decoders TG
Logic with Q2
C 9 Level INHIBIT
TG
Conversion OUT/IN
4
Binary to
CX or CY
1 of 2 TG
Logic Decoders
INH 6
Level
with
Conversion
INHIBIT
Q1
8 7
GND VEE Q3
R1
750
V
IN
G H
INPUT SELECTOR
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
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)
U, C, R, K, A, L models
IC344: LA73050-TLM-E
6-channel 75-ohm video driver
-5V
R7
1.4K
Q8
R18 R19
Q7 4K
5K
R6
7K
Q10
Q9
R5
R17
15K
Q11
5.4K
Q12
Q6 Q17
V
OUT
Q16 Q18
R10 Q19 D3
6.2V
3K R11
R15
10K
2K
Q13
R20
R12 R14
10pF
20K
20pF 600 15K
Q4
Q5 R4
20K Q14 Q15 Q20
Q21
R8 R9 R13 R21
R2 R3 R16
20K 20K 5K 150
0.05
1K 6K
I J K
Page 78 K4
to MAIN (4)_CB193
W3201
OSD
4
CB321 IC342
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
0
0 IC344
3.3
0
0
CB343 3.3
0
IC344
0
CB322
Page 78 F3
to MAIN (5)_W161
POINT 4 Pin 3 of IC342
IC342: LC74782JM-8A16-TLM
The on-screen display controller LSI
9 Serial
11 parallel
converter
10
23
IC303, 321: 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 11 VOUT2 size
7
register
6dB 75
VIN3 5 Driver 10 V+3
AMP 17
Horizontal
character
18
BIAS size
VEE3 6 9 VOUT3
register
19
20
PowerSave 7 REF 8 GND
22
# 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.
L M N
RX-V461/HTR-6040/DSP-AX461
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
IC344
VIDEO (3)
IC304-306, 324, 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
79