Yamaha RX-V1500 Service Manual page 84

A B C
RX-V1500/DSP-AX1500
SCHEMATIC DIAGRAM (VIDEO)
1
2
VIDEO(6)
Page 80 E10 Page 80 F10
to FUNCTION to FUNCTION
3
4
VIDEO(5)
5
INPUT SELECTOR
6
0.1 5.3
0.1 0.1
0.1 0.1
0
0.1
0 0.1
0 0.1
0 0.1
0
0.1
INPUT SELECTOR
0 5.3
0 0.1
0.1 0.1
0 0.1
0.1 0.1
0 0.1
0 0.1
0
0.1
7
8
5.3
5.3 5.3
0
0.1 0.1
0.1
-0.6 0
0.4
0
1.4
0
-4.8
VIDEO(1)
9
Point 4 Pin 3 of IC511
10
84
D E F
0
5.5 11.5 5.4
0
5.5 0
5.5 5.5 5.6
5.5 4.0
0
5.5 0 5.2
5.5 5.6
0 0
0
0
VIDEO(2)
Page 81 I3
to OPERATION (3)
5.3 5.3
4
0
5.3
0 0.1
0 5.3
0.1 0.1
0.1 1.1 2.8
2.9 2.9
0.1 1.1 2.9 2.9
0 1.4
0 4.8
-4.8 4.8
0 5.3
SELECTOR
0
1.4 0.1 0.1 0 0 0 0
0 0.1
0
8 0.1
-4.8 0
0
0 5.3
0 0 5.3
4.6
4.0 0
0.9
0 0
0
5.3 0.9
4.6 -0.4
-4.8 0
0 5.3 0.1
-1.1
0.3
0 4.8
-4.8 4.8 0.5 -1.8
-4.8 4.8 -0.4
0 5.3
0 0
0
3.9
0 0
0 5.3
-4.8 0
5.3
0
-4.8
4
ON
SCREEN
5.3 5.3 5.3
0.1 1.1 1.8
1.1 0.5 1.1
1.1
1.1
-0.6
IC551: M62320FP IC552: LC72722
I/O Expander RDS Decoder
16 15 14 1 5 6
VDDA
3 +
REFERENCE
SCL 2 VOLTAGE
I 2 C Bus Interface
VSSA 4
SDA 3 VREF
Shift Register
1 SO
57kHz
ANTIALIASING SMOOTHING
Output Data Input/Output MPX IN
2 bpf
FILTER FILTER
(SCF)
8 8 8
DO 20
Output I/O Setting I/O Setting
CL 21
RAM ERROR CORRECTION
Data Latch Register Register
DI CCB (24 BLOCK DATA) (SOFT DECISION)
22
CE 23
8 8 8
CLK(4.332MHz)
Reset T1 7 MEMORY
Input Data
CONTROL
T2 8
TEST
VDD 13 Power On
T3
I/O Port 9 OSC/DIVIDER
Reset
GND 8
T4 10
12 11 10 9 7 6 5 4 11 16 17 13
G H
INPUT SELECTOR
0 5.6
0 0
0 0
0 0.2
0 0
0 5.5
-5.0 0.1
0 0.1
0 1
15
0 2 0.2 3
5.6
4
11 0
4.0 5
10
0
0 7
13
0
0 8
12
0
4.4
5.4
5.4
1.1 0
0.5
-5.0
-5.0
VIDEO(3)
4.8 4.8 4.4
3.9
3.9 4.4
0.4
0
-0.5
-0.5
0
VIDEO(4)
VIDEO(8)
IC601, 612: TK15420M IC602, 603, 703: MM74HC4051SJX
Video Amp 8-Channel Analog Multiplexer
VCC Y7 Y6 Y5
OUT A 1 8 VCC 16 4 2
CLOCK
PLL 14 VDDD
RECOVERY
(57kHz)
(1187.5Hz)
–IN A 2 7 OUT B
+ – + –
15 VSSD
A 11
+IN A 3 6 –IN B
DATA
19 RDS-ID
DECODER 4 5
VEE +IN B
B 10
Logic Binary to 1
Level of 2 Decoders
18 SYNC Conversion with INHBIT
SYNC/EC
C 9
CONTROLLER
24 SYR
INH 6
SYNC SYNC
DETECT-1 DETECT-2
8 7
GND VSS
12
I J K
VIDEO(7)
FRONT R
FRONT L
x: NOT USED
O: USED / APPLICABLE
IC607, 610: MM74HC4053SJX
Triple 2-Channel Analog Multiplexer
IN/OUT IN/OUT
Y4 Y3 Y2 Y1 Y0 VCC CY CX BY BX AY AX
5 1 12 15 14 13 16 3 5 1 2 13 12
TG TO
Logic
TG Binary to 1
A 11 Level
of 2 Decoders YG
Conversion
TG with INHBIT
Logic TG
TG COMMON
3 B 10 Level
OUT/IN Conversion Binary to 1
TG of 2 Decoders TB
Logic with INHBIT
TG
C 4 Level
Conversion TC
TG
Binary to 1
Logic
TG of 2 Decoders TG
INH 9 Level
Conversion with INHBIT
8 7
GND VSS
L M N
★ All voltages are measured with a 10MΩ/V DC electronic 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.
IC705: BU2092
Serial In/Parallel Out Driver
Vss 1 18 VDD
DATA 2 17 OE
CLOCK 3 Control 16 Q11
Circuit
LCK 4 15 Q10
Q0 5 14 Q9
Q1 6 13 Q8
Q2 7 12 Q7
Q3 Q6
8 11
Q4 9 10 Q5
IC701: LA7108M
Video Amp
VIN1+ 1 16 +VCC
NFB1 2 15 VOUT1
6dB DR
3
MUTE1 14 GND
VIN2+ 4 13 VOUT2
6dB DR
NFB2 5 12 MUTE2
-VCC1 6 11 VOUT3
VIN3+ 7 MUTE3
6dB DR 10
8
NFB3 9 -VCC2
IC611: LC74781-9798
On Screen Display Controller
CS 9
8-bits
Serial
latch
SIN 11 +
parallel
command
converter decoder Horizontal Vertical Horizontal Vertical Blinking RAM
SCLK 10 Display
write
character character display display and inversion
control
size size position position control address
register counter
register register register register register
RST 23
Blinking
Horizontal Vertical Horizontal Vertical
Display
VDD1 24 and inversion
size size dot dot
control RAM
counter counter counter counter
circuit
VSS1 1
VDD2 12
Blinking Blinking
and inversion and inversion
control control
register register
CHARA 8
Character Line
Decoder
control control
counter counter
Horizontal
character
size Font
Horizontal RAM
OSCIN 6 register
character
size
OSCOUT 7
register Shift
Character output control
Synchronisation register
Timing generator Background control
signal generator
SYNIN 17 Horizontal
Horizontal Video output control
character character
SEPC 18
size size
register
SEPOUT 19 register
SEPIN 20
CTRL3 22
4 21 2 3 5 15 13
CTRL1 CTRL2 XtalIN XtalOUT BLANK CVIN CVOUT
IC609: LA7109
75Ω Video Driver
VIN1+ +VCC1
1 36
NFB1 2 VOUT1
6dB DR 35
3
MUTE1 34 GND
VIN2+ 4 33 VOUT2
6dB DR
NFB2 5 32 DR CTL2
-VCC1 6 31 VOUT3
VIN3+ 7 6dB DR 30 MUTE4
IC608: TC74HCU04AFEL
NFB3 8 29 -VCC4
Hex Inverters
N.C. 9 28 N.C.
1A 1 14 VCC
N.C. 10 27 N.C.
1Y 2 13 6A
VIN4+ 11 11 26 26 +VCC2
OUT/IN 2A 3 12 6Y
NFB4 12 VOUT4
AX or AY 6dB DR 25
2Y 4 11 5A
13
MUTE2 24 GND
OUT/IN
3A 5 10 5Y
BX or BY
VIN5+ 14 23 VOUT5
3Y 6 9 4A
6dB DR
GND 7 8 4Y NFB5 DR CTL1
OUT/IN 15 22
CX or CY
-VCC2 16 21 VOUT6
17
VIN6+ 6dB DR 20 MUTE3
NFB6 18 19 -VCC3