Yamaha RX-V2300 Service Manual page 89

A B
SCHEMATIC DIAGRAM (VIDEO) RX-V1300/RX-V1300RDS/HTR-5590/DSP-AX1300
1
IC601: TK15420M
Video Amp
OUT A 1 8 VCC
–IN A 2 7 OUT B
+ – + –
+IN A 3 6 –IN B
VEE 4 5 +IN B
IC608: TC74HCU04AFEL
Hex Inverters
1A 1 14 VCC
1Y 2 13 6A
2A 3 12 6Y
2
2Y 4 11 5A
5
3A 10 5Y
3Y 6 9 4A
GND 7 8 4Y
Page 85 C8 Page 85 C8
to FUNCTION to FUNCTION
3
4
5
C-INPUT SELECTOR
0
4.7
0
0
0 0 4.8
0 0.2
-4.8
0
0.2
0 0
0 0
Y-INPUT SELECTOR
0 4.7
0
6 0
0 4.8
0
-4.8 0.2
0
0 0.2
0
0
0 0
7
4.7
4.7
0.2
1.0
-0.5
0.3
8
# All voltages 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.
9
C D E
0.2 4.8
0.2
TP00385
Page 87 H5
to OPERATION
4.7
0
0.1
0.1
0 0
0 4.7
4.7
2.6
0
4.2
-4.8
4.2 S-SIGNAL DETECTOR
0 4.7
1.0 1.0
0.7 0
1.2 1.2
0.7
0
-4.8
0.2
0
0.2 0.2
0.2 4.7
0.2 0.1
3.5 0
0.1
0.2
0.2 4.7
-4.8 0.1
0.2 4.7
0.2 -4.8
-4.8 -4.8
-4.8 -4.8
0.2 4.7
0.2 0.1
0.2 0
3.5 0.1
0.2 4.7
-4.8 0.1
0.2 4.7
0.2 -4.8
4.7
4.7 4.7
C1740S
(R/S)
1.0 1.7
0.2
1.7 0.4 1.0 C1740S
(R/S)
1.0 0.5
1.0
F G
0 4.8
0 0
INPUT
0 0
0 0
SELECTOR
0 0
0 4.8
-4.8 0
0 0
0
0
0 0
3.5 0
0
0 0
3.5
4.8 4.8
0 33
0 0
0 -4.8
0 0
0
4.8
-4.8
Cb
SELECTOR
0
0
0
0
0
-5.0
0
2.6
2.6 2.6 2.5
4.7
0 4.2
4.7 0
0
0
0 3.4 3.8
SYNC SIGNAL DETECTOR
4.7
4.0
0.9
1.1
4.0
0.3
-0.7
0.1
0 -0.4
-0.5
-0.4
-0.3
0
ON
SCREEN
&3 IC601
H I
RX-V2300/DSP-AX2300/RX-V1300/RX-V1300RDS/HTR-5590/DSP-AX1300
IC581: LC72722
RDS Decoder
1 5 6
VDDA 3 CLOCK
+ PLL
RECOVERY
REFERENCE (57kHz)
(1187.5Hz)
VOLTAGE
VSSA 4
VREF
57kHz
ANTIALIASING SMOOTHING DATA
MPX IN 2 bpf
FILTER FILTER DECODER
(SCF)
DO 20
CL 21
RAM ERROR CORRECTION SYNC/EC
DI 22 CCB (24 BLOCK DATA) (SOFT DECISION) CONTROLLER
CE 23
T1 CLK(4.332MHz)
7 MEMORY
CONTROL
T2 8 SYNC SYNC
TEST
T3 9 OSC/DIVIDER DETECT-1 DETECT-2
T4 10
11 16 17 13 12
IC582: M62320FP
I/O Expander
16 15 14
SCL 2
I 2 C Bus Interface
SDA 3
Shift Register 1 SO
Output Data Input/Output
8 8 8
Output I/O Setting I/O Setting
Data Latch Register Register
8 8 8
Reset
Input Data
VDD 13 Power On
I/O Port
Reset
GND 8
12 11 10 9 7 6 5 4
IC602, 603: MM74HC4051N
IC702: MM74HC4051SJX
8-Channel Analog Multiplexer
IN/OUT
VCC Y7 Y6 Y5 Y4 Y3 Y2 Y1 Y0
16 4 2 5 1 12 15 14 13
A 11
B 10
Logic Binary to 1
Level of 2 Decoders
Conversion with INHBIT
9
C
INH 6
8 7
GND VSS
IC607: MM74HC4053N
Triple 2-Channel Analog Multiplexer
IN/OUT
VCC CY CX BY BX AY AX
16 3 5 1 2 13 12
TO
Logic
Binary to 1
Level
A 11 of 2 Decoders YG
Conversion
with INHBIT
Logic TG
10
B Level
Conversion Binary to 1
of 2 Decoders TB
Logic with INHBIT
C 4 Level
Conversion TC
Logic Binary to 1
INH 9 Level of 2 Decoders TG
Conversion with INHBIT
8 7
GND VSS
Y
SELECTOR
4.9 0 4.9 IC609: LA7109
-5.0 0 75Ω Video Driver
0
IC610: LC74781-9798
0 0 4.9
On Screen Display Controller
0 -5.0 0 VIN1+ +VCC1
0 4.9 1 36
0 -5.0 0
0 4.9 0
NFB1 2 6dB DR 35 VOUT1
CS 9
4.8
Serial
MUTE1 3 34 GND SIN 11
parallel
converter
VIN2+ 4 33 VOUT2
SCLK 10
6dB DR
NFB2 5 32 DR CTL2
6
-VCC1 31 VOUT3
RST 23
VIN3+ 7 6dB DR 30 MUTE4
8
NFB3 29 -VCC4
VDD1 24
N.C. 9 28 N.C.
10
N.C. 27 N.C.
VSS1 1
VIN4+ 11 11 26 26 +VCC2
NFB4 12 6dB DR 25 VOUT4
VDD2 12
CHARA 8
MUTE2 13 GND
24
VIN5+ 14 23 VOUT5
6dB DR
NFB5 15 22 DR CTL1 Horizontal
OSCIN 6
character
-VCC2 16 21 VOUT6 size
OSCOUT 7
register
17
VIN6+ 6dB DR 20 MUTE3
SYNIN 17
Horizontal
NFB6 18 19 -VCC3
character
SEPC 18
size
SEPOUT 19 register
SEPIN 20
IC701: LA7108M
CTRL3 22
Cr SELECTOR
Video Amp
0 5.8
0 0
0 0
VIN1+ 1 16 +VCC
0 0
0 0
IC705: BU2092
0 0
NFB1 2 6dB DR 15 VOUT1
Serial In/Parallel Out Driver
0 0
0 4.8
3
MUTE1 14 GND
Vss 1
DATA 2
VIN2+ 4 13 VOUT2
CLOCK 3
6dB DR
LCK 4
NFB2 5 12 MUTE2
Q0 5
Q1
6
-VCC1 6 11 VOUT3
Q2 7
Q3 8
7
VIN3+ 6dB DR 10 MUTE3
Q4 9
NFB3 8 9 -VCC2
0 5.8
0 0
0 0
0 0
0 0
0 0 IC751, 753, 754: TC74HC4052AF
0 0
Analog Multiplexer/Demultiplexer
0 4.8
INH VCC
6 16
INHIBIT
A LEVEL BINARY TO 1-OF-4
10
CONVERTER DECODER WITH INHIBIT
B 9
GND 8
VEE
7
0X 12 SW
1X 14 SW
X-COM
13
2X 15 SW
3X 11 SW
0Y 1 SW
1Y 5 SW
Y-COM
3
2Y 2 SW
TK15420MTL 3Y 4 SW
AD8056AR
J K L
14 VDDD
15 VSSD
19 RDS-ID
18 SYNC
24 SYR
TG
TG
TG
TG
COMMON
3
OUT/IN
TG
TG
TG
TG
OUT/IN
AX or AY
OUT/IN
BX or BY
x: NOT USED
O: USED / APPLICABLE
OUT/IN
CX or CY
8-bits
latch
+
command
decoder Horizontal Vertical Horizontal Vertical Blinking RAM
Display
write
character character display display and inversion
control
size size position position control adress
register
register register register register register counter
Blinking
Horizontal Vertical Horizontal Vertical
and inversion Display
size size dot dot
RAM
control
counter counter counter counter
circuit
Blinking Blinking
and inversion and inversion
control control
register register
Character Line
Decoder
control control
counter counter
Horizontal
character
Font
size
RAM
register
Character output control
Synchronization
Shift
Timing generator Background control
signal generator register
Horizontal Video output control
character
size
register
4 21 2 3 5 15 13
CTRL1 CTRL2 XtalIN XtalOUT BLANK CVIN CVOUT
18 VDD
17 OE
Control 16 Q11
Circuit
15 Q10
14 Q9
Q8
13
12 Q7
11 Q6
10 Q5
IC752: NJM2581M
Video Amp
B A 6dB 75Ω
VIN1 1 14 V+1
AMP Driver
0 0 0 0x, 0y
0 0 1 1x, 1y
BIAS
0 1 0 2x, 2y NEE1 2 13 VOUT1
0 1 1 3x, 3y
1 X X NONE
6dB 75Ω
VIN2 3 12 V+2
AMP Driver
BIAS
VEE2 4 11 VOUT2
6dB 75Ω
VIN3 5 10 V+3
AMP Driver
BIAS
VEE3 6 VOUT3
9
PowerSave 7 REF 8 GND
89