Yamaha RX-V740, Руководство по обслуживанию

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A B C D E F G H I J K L
RX-V740/RX-V740RDS/DSP-AX740
RX-V640/RX-V640RDS/HTR-5660/DSP-AX640/DSP-AX640SE
83
1
2
3
4
5
6
7
8
9
SCHEMATIC DIAGRAM (FUNCTION 2/2) RX-V740/RX-V740RDS/DSP-AX740
IC707, 709, 822: TC74HC4053AF
Analog Multiplexer/Demultiplexer
16
VDD
6
INHIBIT
11
15
14
9
A
C
B
8 VSS
7
VEE
12
0X
13
1X
2 0Y
1 1Y
5
0Z
3
1Z
LEVEL
CONVERTER
10
BINARY TO 1-OF-8
DECODER WITH INHIBIT
SW
SW
SW
SW
SW
SW
4
Z-COM
X-COM
Y-COM
INPUT STATES
INHIBIT
0
0
0
0
0
0
0
0
1
"ON" CHANNNEL (S)
0X, 0Y, 0Z
1X, 0Y, 0Z
0X, 1Y, 0Z
1X, 1Y, 0Z
0X, 0Y, 1Z
1X, 0Y, 1Z
0X, 1Y, 1Z
1X, 1Y, 1Z
NONE
C
0
0
0
0
1
1
1
1
X
B
0
0
1
1
0
0
1
1
X
A
0
1
0
1
0
1
0
1
X
IC602: NJM78L05A-T3
Voltage Regulator
INPUT
OUTPUT
GND
IC603: LC72722
RDS Decoder
+
REFERENCE
VOLTAGE
57kHz
bpf
(SCF)
CCB
TEST
PLL
(57kHz)
ANTIALIASING
FILTER
SMOOTHING
FILTER
RAM
(24 BLOCK DATA)
ERROR CORRECTION
(SOFT DECISION)
SYNC/EC
CONTROLLER
SYNC
DETECT-1
DATA
DECODER
CLOCK
RECOVERY
(1187.5Hz)
MEMORY
CONTROL
OSC/DIVIDER
VREF
CLK(4.332MHz)
SYNC
DETECT-2
VDDA
VSSD
VDDD
RDS-ID
SYNC
SYR
VSSA
MPX IN
DO
CL
DI
CE
T1
T2
T3
T4
T5 T6 T7
X IN
VREF FL OUT C IN
X OUT
3 14
15
19
18
24
1 5 6
4
2
20
21
22
23
7
8
9
10
11 16 17 13 12
IC705, 706: TK15420M
Video Amp
– +
1
2
3
4 5
– +
6
7
8 OUT A
–IN A
+IN A
VEE
VCC
OUT B
–IN B
+IN B
IC701, 702, 801: TC74HC4051AFEL
Analog Multiplexer/Demultiplexer
16
VCC
6
INHIBIT
11
3
9
A
C
B
8
GND
7
VEE
13 0
14 1
15
2
12
3
1
4
5
5
LEVEL
CONVERTER
10
BINARY TO 1-OF-8
DECODER WITH INHIBIT
SW
SW
SW
SW
SW
SW
2
6
4 7
SW
SW
COM
INPUT STATES
INHIBIT
0
0
0
0
0
0
0
0
1
"ON" CHANNNEL
0
1
2
3
4
5
6
7
NONE
C
0
0
0
0
1
1
1
1
X
B
0
0
1
1
0
0
1
1
X
A
0
1
0
1
0
1
0
1
X
IC703: LA7109
75
Ω
Video Driver
35
VOUT1
33 VOUT2
31 VOUT3
30 MUTE4
29 -VCC4
32 DR CTL2
36
+VCC1
34
GND
2 NFB1
4 VIN2+
6 -VCC1
7
VIN3+
8
NFB3
28
N.C.
27
N.C.
26 +VCC2
9 N.C.
10 N.C.
11 VIN4+
5 NFB2
1
VIN1+
3 MUTE1
DR 6dB
DR 6dB
DR 6dB
25 VOUT4
23 VOUT5
21 VOUT6
20 MUTE3
19 -VCC3
22 DR CTL1
26
24
GND
12 NFB4
14 VIN5+
16
-VCC2
17
VIN6+
18
NFB6
15 NFB5
11
13 MUTE2
DR 6dB
DR 6dB
DR 6dB
IC704: LC74781-9798
On Screen Display Controller
CS 9
RST 23
VSS1 1
SIN 11
SCLK 10
OSCIN 6
OSCOUT 7
SYNIN 17
SEPC 18
SEPOUT 19
CHARA 8
VDD2 12
SEPIN 20
CTRL3 22
4
CTRL1 XtalIN XtalOUT BLANK CVIN CVOUT CTRL2
21 2 3 5 15 13
VDD1 24
Serial
parallel
converter
8-bits
latch
+
command
decoder
Horizontal
character
size
register
Horizontal
size
counter
Horizontal
display
position
register
Horizontal
dot
counter
Vertical
display
position
register
Vertical
dot
counter
Blinking
and inversion
control
register
Blinking
and inversion
control
circuit
Blinking
and inversion
control
register
Blinking
and inversion
control
register
Character
control
counter
Line
control
counter
Timing generator
Synchronisation
signal generator
Character output control
Background control
Video output control
Display
control
register
RAM
write
address
counter
Display
RAM
Vertical
character
size
register
Vertical
size
counter
Decoder
Font
RAM
Shift
register
Decoder
Horizontal
character
size
register
Horizontal
character
size
register
Horizontal
character
size
register
Horizontal
character
size
register
IC708: TC74HCU04AF
Hex Inverters
1A
1Y
2Y
VCC
6A
1
2
3
4 11
2A 6Y
5A
12
13
14
3A
3Y
5Y
4A
5
6
7 4Y 8
9
10
GND
15 VOUT1
13 VOUT2
11 VOUT3
10
MUTE3
9
-VCC2
12 MUTE2
16 +VCC
14 GND
2
NFB1
4 VIN2+
6 -VCC1
7 VIN3+
8 NFB3
5 NFB2
1 VIN1+
3 MUTE1
DR 6dB
DR 6dB
DR 6dB
IC802: LA7108M
Video Amp IC821: LA7104M
Video Amp
15 VOUT1
13 VOUT2
11
VOUT3
10 MUTE2
9 -VCC2
12 DR CTL
16 +VCC
14
GND
2 NFB1
4 VIN2+
6 -VCC1
7
VIN3+
8
NFB3
5 NFB2
1 VIN1+
3 MUTE1
DR 6dB
DR 6dB
DR 6dB
Y SELECTOR
Cb SELECTOR
Cr SELECTOR
INPUT
SELECTOR
Y-INPUT SELECTOR
Y/C MIX
VIDEO DRIVER
C-INPUT
SELECTOR
ON
SCREEN
S-SIGNAL DETECTOR
MICRO COMPUTER
★
All voltages are measured with a 10M
Ω
/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.
Point
3
Pin 12 of IC603 Point
4
Pin 13 of IC601
Point
5
Emitter of Q601 and collector of Q602
Point
2
Pin 3 of IC704
POWER ON
(Connect the power cord)
POWER OFF
(Disconnect the power cord)
A
B
Q601 E
Q602 C
Page 88
to OPERATION (1)
G8 Page 81
to DSP
E1
P
age 91
to MAIN (1)
E1
P
age 91
to MAIN (2)
F6
Page 90
to VIDEO
D1 Page 82
to FUNCTION (1)
E2 Page 82
to FUNCTION (1)
F2
x: NOT USED
O: USED / APPLICABLE
3
5
6
8
1
2
13
12
11
10
15
3
3
2
6
5
8
7
1
1
7
8
4
3
2
6
5
2
3
4
A
5
B
4.9
4.9
0
4.9 4.5 4.9 0.3 0.9 4.9
0
4.7
0
4.9 4.9
0
0.9 4.9 4.9 4.9
4.9
4.9
4.9
0.9
0
4.8 4.9 2.4
0
2.3 4.9 4.5
0.1
0
0.2
0
0
0.1
4.9
4.9
0
0
4.9
0
4.9
4.9
4.9
4.9
4.9
4.2
0.9
4.9
4.9
4.9 4.9
4.9
0 0 0 0 0
4.9
0
4.9 4.9
0
4.9 4.9 4.9 4.9 4.9 4.9 4.9
0
0.2
0
4.8
4.9
4.9
0
0
0
4.9
4.8
4.9
0
0
0
0
4.9
0.7
1.0
4.8
4.9
0
4.9
0
1.9
4.9
4.9
4.9
1.9
0
0
0
4.7
13.2
12.5
0.6
4.9
4.7
4.9 4.9
7.5
7.5
0
7.0
13.1
4.9 13.2
0.6
0
0
0
0
0
4.9
0
0
0
-11.9
4.9
4.9
-11.9
4.9
4.9
-11.9
4.9
4.9
-11.9
4.9
4.9
-11.9
4.9
4.9
11.7
5.6
5.0
0.6
2.3
11.7
2.9
0
2.3 2.3 4.5
0
2.3
2.2
0 0
2.0
1.8 4.9
0 0 0 0
5.0
4.9
0
0 0 0 0
4.9
0
4.9
0 0 0
0
-4.9
0
0
-4.9
4.9
0
0
4.9
0
0
0
4.9
0
0
0
4.9
-4.9
0
5.0
5.0
5.0
5.0
-4.9
-4.9
-4.9
-4.9
0
0
0.6
4.9
4.9
0
0
0
4.9
0
0
0
0
0
0
0
0
0
0
0
0
0
4.9
4.9
-4.9
0
0
2.6
0
0.1
0
0
0
0 0 0
0
0
0
0
0
0
4.9
4.9
4.9
4.9
4.9
4.4
4.4
-0.3
0.9
4.9
4.2
-1.8
4.2
-0.1
-0.4
4.2
2.6
2.6 2.6
4.9
1.3
0
0.9 4.9 2.0
0
4.9
0
1.9 4.9 4.9
0.2 4.7
2.4 2.4
2.5
2.3 0
4.9
0
0.1
4.9
1.0
1.3
4.9
-0.6
1.7
1.0
1.0
0
4.9
1.0
1.0
0.5
0.5
0
0
0
0
0
0
0
0 0
0
4.9
0.2
4.9
0.9
1.0
1.0
-0.6
0.9
0 0
4.9
4.9
0 0 0 0 0 0 0
0 0 0 0 0 0
-4.9
0
4.9
0 0 0 0 0 0 0
0 0 0 0 0 0
-4.9
0
0 0
0
-4.8
1.0
-4.8
4.9
-4.8
0.1
0
0.1
4.8
-4.8
-4.8
-4.8
0
4.8
0
0
0
4.8
0
4.8
0
0
0
0
0
-4.8
-4.8
-4.8
-4.8
0
0
0
0
0
0
0
0
0 0
0
0
0
0
0
0
0
0 0
0
0
0
4.9
-4.8
4.4 0
-4.8
0 4.9
4.9
4.4
GND
VOUT3
V+3
VOUT2
V+2
VOUT1
V+1
NJM2581M
PS
VEE3
VIN3
VEE2
VIN2
VEE1
VIN1
Note: IC821 LA7104M for P.W.B. A to D version.
NJM2581M for P.W.B. E or later version.