Yamaha RX-V800 Service Manual page 53

A B
SCHEMATIC DIAGRAM (VIDEO)
1
INPUT SELECTOR
2
0 0
0
0
0
0
0
0
0
0
4.9 0
0
0
-4.9
-4.9
-0.1 0
0
3.2
3
0
-0.1
0
3.1
4.9
0
1.0 0
0.4 0
4.9
4
5
C-INPUT
SELECTOR
4.9
0 0 0
0
0 0
0
0 4.8
0
0
0
0
0
0 0
0
0 0
1.6
0
0
0
-4.8
0
6
0
0
0 0
Y-INPUT
SELECTOR 0
0
3.1
0
0
-4.7
0
0
-4.7
-4.7
0
0
3.1
0
0
0
0
7
4.9 4.9
1.0 0
-0.7
0.4
0
0.7
0
8
9
C D E
E-66/J-62
D5
4.9
4.9
0
-4.8
9 0
-4.8 0
0 0
0
0
0
0 0
0
4.9 0
0
4.9 Y SELECTOR
0
0
0
0
0 0
0
0
0
Cb SELECTOR
Cr SELECTOR
0
0
0 0
0
0
0
E-66/J-62
C1
4.9
0 0
1.0
4.9
0 2.6 2.6
2.6
2.6
0 4.9
2.6 2.6
-4.8 0
1.0 0 0
4.9 4.8
4.9
1.0
4.5
1.6 1.0
0 0
0
0 4.9
0 4.9
0 4.5
0 0
0
-4.8 0
4.5
0 0 4.8
4.9
0
0
4.8
4.9
-0.1 4.3
0
0.8
4.8 0.8
4.3
-0.5 0
-0.1 0.8
3.1
-0.9
-4.7
0.2
-4.7 -1.6 -0.6
-4.7
-0.5
4.8
-0.1
0 -0.6
4.8
-0.1
0
3.1
-4.7
1
ON
4.9 SCREEN
1.7
1.0
1.0
1.0
1.7
All voltage are measured with a 10MΩ /V DC electric volt meter.
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.
F G
46.6 46.5
46.6 47.1
25.4
46.1
0
45.2
45.1 46.4
0
0
-0.6
-0.6 0
45.2
45.2 46.0
0 0
-0.6
0
-0.6
FRONT L
45.1
45.1
45.1
E-62/J-58
I6 0 0
-0.6 -0.6
CENTER
REAR L
45.0
45.0 45.0
0 0
-0.6 -0.6
4.9
0
4.5
4.3
4.3
45.2
46.6
45.2
0
0
-0.6
-0.6
-11.9
0
Point 1 Pin 3 of IC610
H I
IC601: TK15420M IC602, IC603, IC702: TC74HC4051AP
Video Amp Analog Multiplexer/Demultiplexer
OUT A 1 8 VCC
–IN A 2 7 OUT B
+ – + –
+IN A –IN B
3 6
VEE 4 5 +IN B
IC607, IC752: TC74HC4053AP
Analog Multiplexer/Demultiplexer
INHIBIT VDD
6 16
A 11
LEVEL BINARY TO 1-OF-8
B 10
CONVERTER DECODER WITH INHIBIT
C 9
VSS 8
VEE
7
45.8
0X 12 SW
1X SW
13
1.0
0Y 2 SW
22P/630
1Y
1 SW
0Z 5 SW
1Z 3 SW
IC610: LC74781-9798
On Screen Display Controller
CS 9
8-bits
Serial
latch
SIN 11 +
45.6
parallel command
converter decoder
Horizontal Vertical Horizontal
SCLK 10
character character display
1.0
size size position
22P/630 register register register
RST 23
Horizontal Vertical Horizontal
size size dot
counter counter counter
VDD1 24
Blinking
and inversion
VSS1 1
control
register
46.1 VDD2 12
Character
CHARA 8
control
1.0
-11.9
counter
0
1.0 Horizontal
0 character
1.0 size
Horizontal
OSCIN register
0 6
character
1.0
size
OSCOUT
0 7
register
1.0
0
Timing generator
1.0
SYNIN 17 Horizontal
Horizontal
45.7
character character
46.5 SEPC 18
size size
0
register
SEPOUT 19 register
SEPIN 20
CTRL3
22
4
45.7
CTRL1 CTRL2
1.0
IC609: LA7109
IC611: BU2092
75Ω Video Driver
Serial In/Parallel Out Driver
VIN1+ +VCC1
1 36
NFB1 2 6dB DR 35 VOUT1
DATA
CLOCK
MUTE1 3 34 GND
VIN2+ 4 33 VOUT2
6dB DR
NFB2 5 32 DR CTL2
-VCC1 6 31 VOUT3
46.1
VIN3+ 7 30 MUTE4
6dB DR
1.0
8
NFB3 29 -VCC4
N.C. 9 28 N.C.
IC751: LA7104M
N.C. 10 N.C.
27
Video Amp
VIN4+ 11 11 26 26 +VCC2
NFB4 12 6dB DR 25 VOUT4
VIN1+
13
MUTE2 24 GND
NFB1
VIN5+ 14 23 VOUT5
6dB DR
MUTE1
NFB5 DR CTL1
15 22
-VCC2 16 21 VOUT6
VIN2+
VIN6+ 17 6dB DR 20 MUTE3
NFB2
NFB6 18 -VCC3
19
-VCC1
VIN3+
NFB3
R268, 275, 282
19 C266
20 R254, 261
J K L
RX-V800/RX-V800RDS/HTR-5280/DSP-AX8
IC608: TC74HCU04AP
Hex Inverters
INPUT STATES 1A 1 14 V
DD
"ON" CHANNNEL (S)
INHIBIT C B A
2
0 0 0 0 0X, 0Y, 0Z 1Y 13 6A
0 0 0 1 1X, 0Y, 0Z
0 0 1 0 0X, 1Y, 0Z 2A 3 12 6Y
0 0 1 1 1X, 1Y, 0Z
2Y 4 11 5A
X-COM 0 1 0 0 0X, 0Y, 1Z
14
0 1 0 1 1X, 0Y, 1Z
3A 5 10 5Y
0 1 1 0 0X, 1Y, 1Z
15 Y-COM
0 1 1 1 1X, 1Y, 1Z
3Y 6 9 4A
1 X X X NONE
4 Z-COM
V 7 8 4Y
SS
Vertical Blinking RAM
Display
display and inversion write
control
position control adress
register
counter
register register
Blinking
Vertical
and inversion Display
dot
RAM
control
counter
circuit
Blinking
and inversion
control
register
Line
Decoder
control
counter
Font
RAM
Character output control
Synchronization Shift
Background control
signal generator register
Video output control
21 2 3 5 15 13
XtalIN XtalOUT BLANK CVIN CVOUT
IC701: LA7108M
Video Amp
Vss 1 18 VDD
VIN1+ 1 16 +VCC
2 17 OE
3 Control 16 Q11
Circuit NFB1 2 6dB DR 15 VOUT1
LCK 4 15 Q10
Q0 5 14 Q9
3
MUTE1 14 GND
Q1 6 13 Q8
Q2 7 12 Q7
Q3 Q6 VIN2+ 4 13 VOUT2
8 11
Q4 9 10 Q5
6dB DR
NFB2 5 12 MUTE2
-VCC1 6 11 VOUT3
7
VIN3+ 6dB DR 10 MUTE3
NFB3 8 9 -VCC2
1 16 +VCC
2 6dB DR 15 VOUT1
3 GND
14
4 13 VOUT2
6dB DR
DR CTL
5 12
6 11 VOUT3
7 MUTE2
6dB DR 10
8 9 -VCC2
2200/6.3 2200/6.3 2200/6.3 2200/6.3
UR81922 UR81922 UR81922 UR81922
270 270
HC65527 HC65527
E-66/J-62