Yamaha RX-V757 Service Manual page 46

A B C
SCHEMATIC DIAGRAM (SUBTRANS)
1
TO POWER CABLE
5.0
~
5.0 ~
~
~
~
4.9
5.2
2
0 ~
5.0
~
~
0.2
0 5.0 ~
0.2 ~
0
0 ~ ~
~ ~
~
0 ~ ~
0 ~
0
~ ~
~
~
0
~ 1.0 1.0 10.0
0.8
~ 0
0.1
0.1
3
4
5
C-INPUT SELECTOR
0 4.7
0 0
0 0
0 0
0
0 4.9
-4.9 0
0 0
Y-INPUT SELECTOR
0 4.7
0 0
0 0
0 0
0
0 4.9
6
-4.9 0
0 0
7
4.8
4.8
0.9
0.1
-0.6
0.2
8
IC601, 602 : MM74HC4051SJX
Analog Multiplexers/Demultiplexers
INHIBIT VDD
IC402 : TC4013BP IC609, 903 : TC74HCU04AFEL 6 16
Dual D Flip Flop Hex Inverters
A
11
LEVEL
B 10
CONVERTER
C 9
VSS
8
1A 1 14 V VEE
1 DD 7
1Q 14 VDD
Q X0 13
1Y 2 13 6A
2 13
1Q Q 2Q
X1 14
Q
3 2Q 2A 3 12 6Y
1CP CP Q 12 X2 15
4 2Y 4 11 5A X3 12
9 1CL CL CP 11 2CP
X4 1
5 3A 5 10 5Y
1DATA D CL 10 2CL
X5 5
1PR 6 3Y 6 9 4A
PR D 9 2DATA
X6 2
2PR
VSS 7 PR 8 V SS 7 8 4Y X7 4
IC603, 604 : MM74HC4053SJX
Analog Multiplexers/Demultiplexers
VDD
16
X-COMMON
14
A 11 OUT C IN 12 OX
OUT C IN 13 IX
B 10 OUT C IN 2 OY
10
OUT C IN 1 IY
C 9
OUT C IN 5 OZ
CONTROL INPUTS "ON" CHANNEL
INHIBIT C B A 0X (Pin 12), 0Y (Pin 2), 0Z (Pin 5)
OUT C IN 3 IZ
(Pin 6) (Pin 9) (Pin 10) (Pin 11) 1X (Pin 13), 1Y (Pin 1), 1Z (Pin 3)
L L L L 0X, 0Y, 0Z
INH 6 Z-COMMON L L L H 1X, 0Y, 0Z
4
L L H L 0X, 1Y, 0Z
L L H H 1X, 1Y, 0Z
15 Y-COMMON L H L L 0X, 0Y, 1Z
L H L H 1X, 0Y, 1Z
L H H L 0X, 1Y, 1Z
L H H H 1X, 1Y, 1Z
8 7
H * * * NOTE
VSS VEE * Don't Care
D E F
HTR-5860
TO POWER TRANSFORMER
~
~
AC 152.6
Page 93 E-8 Page 94 C-9
~
TO SUBTRANS (3) CB601 TO CONVERSION (1) CB705
0
AC 7.5
~ ~
Page 94 J-3
10.0
TO CONVERSION (2) CB832
Page 87 L-5
Page 93 G-3
10.0
TO FUNCTION (2) CB902
TO SUBTRANS (3) CB603
Page 93 I-3
TO SUBTRANS (2) CB462
0.7
S-SIGNAL DETECTOR
4.8
0
0.7 4.8
-0.1
0 0 0.7
4.8
0 0.9
0 0.3 2.5 2.5 2.5
-0.1 -0.5
0 4.3
-4.9 4.3
0 4.7
-0.2
-0.5 0 0 0 4.7
-0.2
0
-4.9
0
VIDEO DRIVER
0 4.7
0 -0.1
4.8
0 0
0 -0.1
4.1
0 4.7
-4.9 0
0 4.7
4.1
0 -4.9 0
-4.9 -4.9 -1.0
-4.9 -4.9
-1.8
0 4.7
0.5
0 -0.1
3.6 0
0 -0.1
0 4.7
-4.9 0
0 4.7
0 -4.9
4
Y/C MIX
4.8
-0.4 4.8 4.8 4.8
0.2
-0.2
0.9 1.6
0
0.6 0.3 0.9
0.5
1.0
0.5
-4.9
ON SCREEN
Page 93 D-2
TO SUBTRANS (8) CB445
BINARY TO 1-OF-8
DECODER WITH INHIBIT
SW
SW
INPUT STATES
"ON" CHANNEL (S)
SW INHIBIT C B A
0 0 0 0
0
SW 3 X
0 0 0 1 1
0 0 1 0 2
SW
0 0 1 1 3
SW 0 1 0 0 4
0 1 0 1 5
SW
0 1 1 0 6
SW 0 1 1 1 7
1 X X X NONE
IC606 : LC74781-9798
On-screen Display Controller
CS
SERIAL 8 BIT
LATCH
SIN +
PARALLEL COMMAND
DECODER
SCLK CONVERSION
HORIZONTAL VERTICAL DIRECTION
DIRECTION CHARACTER SIZE
CHARACTER SIZE
REGISTER REGISTER
RST
HORIZONTAL VERTICAL
SIZE COUNTER SIZE COUNTER
VDD1
VSS1
VDD2
CHARA
SYNCHRONOUS
DISTINCTION
OSC IN CHARACTER
OUTPUT
DOT CLOCK
OSC OUT GENERATOR
TIMING
GENERATOR
SYN IN
COMPLEX
SYNCHRONOUS SYNCHRONOUS
SEP C SIGNAL
SEPARATION SEPARATION
CONTROL
SEP OUT
CTRL
SEP IN
2
CTRL3
G H
Page 87 B-2
TO FUNCTION (1) CB302
X: NOT USED
Page 94 B-3
Page 87 B-2
TO CONVERSION (1) CB704
TO FUNCTION (1) CB301
Page 93 D-3
TO SUBTRANS (7) CB447
REGULATOR
2.5 2.5 2.5
4.7 4.3
Page 90 G-10
0 0 4.8
TO MAIN (2) CB122
0
0 4.4 4.8
0.9
0.5
0.9
-0.5 0 0 Page 90 F-1
-0.6 TO MAIN (1) W10
0.2
REGULATOR
-0.6
-0.5
0
10.0 5.6 5.6 4.9
0
5.6 5.1
5.6 4.9
L
4.5
4.7
2
Page 89
TO OPERATION (1) CB801
HORIZONTAL VERTICAL FLASHING & DISPLAY RAM
DISPLAY DISPLAY CONVERSION CONTROL WRITE
POSITION POSITION CONTROL ADDRESS
REGISTER REGISTER REGISTER REGISTER COUNTER
HORIZONTAL VERTICAL FLASHING & DISPLAY
DOT COUNTER DOT COUNTER CONVERSION DECODER RAM
CONTROL
CIRCUIT
HORIZONTAL VERTICAL
DISPLAY POSITION DISPLAY POSITION
DETECTION DETECTION
CHARACTER LINE
CONTROL CONTROL DECODER
COUNTER COUNTER
FONT ROM
ON SCREEN
SYNCHRONOUS CHARACTER OUTPUT CONTROL
SHIFT
SIGNAL BACKGROUND CONTROL REGISTER
GENERATOR VIDEO OUTPUT CONTROL
(Specifications for the beginnings of production) /
（生産初期の仕様）
CTRL XTAL XTAL BLANK CV CV
1 IN OUT IN OUT
I J K
X: NOT USED
X: NOT USED
Page 93 E-3 Page 87 L-1 Page 87 C-1
TO SUBTRANS (3) CB602 TO FUNCTION (1) CB303
TO FUNCTION (2) CB901
SW
4.9
-12.0 4.9
4.9
-12.0 4.9
4.9
-12.0 4.9
4.9
4.9 4.2
0
0
4.9
4.9
4.9 0.1
4.9 0.1
4.9 0.1
0 4.9 4.9
CPU
4.9 4.9
2.1 0 4.9
0 4.9 4.9
4.9 4.9
0.4
2.1 3 0
CH 2 2
0.4 4.9
4.9 4.9
1.0 4.9
4.9 4.2
4.9 4.9
0 4.9
3.6 0.1
4.9 0
4.9 0.1
4.9
4.9 0.1
4.9
3
CH 1
4.9 4.9
4.3
0.1 5.0
0.1
4.9
0
D-8 Page 85 J-1
TO DSP CB1
4
IC901 : M35012-133SP
On-screen Display Controller
0.1/16 1 2 18
TIMING
SIGNAL
SEPARATION TUNING
330
SIGNAL
CS 3 SELECTOR
OSC
INPUT (DISPLAY)
SCK 4
CONTROL
H COUNTER
SIN 5
DATA ADDRESS DISPLAY
CONTROL CONTROL POSITION
DETECTOR
TIMING
GENERATOR
DISPLAY
CONTROL ADDRESS READ
REGISTER CONTROL
DISPLAY
DISPLAY DATA MEMORY
CONTROL
V DD 1 20
BLANKING SHIFT
DISPLAY CHARACTER ROM
AC 6 CIRCUIT REGISTER
V SS 11
V DD 2 7
L M N
RX-V757/DSP-AX757/DSP-AX757SE
RX-V657/HTR-5860
IC607, 608 : TK15420M
Video Amp
OUT 1 1 8 +V CC
–IN 2 7 OUT
1 2
+ – + –
+IN 1 3 6 –IN 2
–V CC 4 5 +IN 2
IC605 : LA7109
75Ω Video Driver
VIN1+ 1 36 +VCC1
NFB1 VOUT1
2 6dB DR 35
MUTE1 3 34 GND
Page 87 E-1
VIN2+ VOUT2
TO FUNCTION (1) CB304 4 33
NFB2 5 6dB DR 32 DR CTL2
–VCC1 6 31 VOUT3
VIN3+ MUTE4
7 30
NFB3 8 6dB DR 29 –VCC4
N.C. N.C.
9 28
N.C. 10 27 N.C.
VIN4+ 11 26 +VCC2
NFB4 VOUT4
12 6dB DR 25
MUTE2 13 24 GND
VIN5+ VOUT5
14 23
NFB5 15 6dB DR 22 DR CTL1
–VCC2 16 21 VOUT6
VIN6+ MUTE3
17 20
NFB6 18 6dB DR 19 –VCC3
Point w (Pin 13 of IC451)
Point e
CH 1 : Cathode of D452
CH 2 : Pin 12 of IC451
U, C only
↑ ↑
AC POWER ON AC POWER OFF
(Connect the power cable) (Disconnect the power cable)
↑
AC POWER ON
(Connect the power cable)
Point r (Pin 3 of IC606)
19
* All voltages are measured with a 10M Ω /V DC electronic volt meter.
TUNING 17 OSC IN * Components having special characteristics are marked Z and
SIGNAL
OSC 16 OSC OUT
must be replaced with parts having specifications equal to
those originally installed.
* Schematic diagram is subject to change without notice.
TIMING
GENERATOR
8 CVIDEO
NTSC * 電圧は、内部抵抗10MΩの電圧計で測定したものです。
VIDEO 9 LECHA
OUTPUT
10 CVIN * Z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、
12 P0
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。
13 P1
14 P2
* 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ございます。
15 P3
93