Yamaha RX-V550, Руководство по обслуживанию

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A
1
2
3
4
5
6
7
8
9
10
B C D E F G H I J K L M N
77
RX-V550/HTR-5750/RX-V450/HTR-5740/DSP-AX450
SCHEMATIC DIAGRAM (FUNCTION 2/2) RX-V550
★
All voltages are measured with a 10M
Ω
/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.
★ 電圧は、内部抵抗10MΩの電圧計で測定したものです。
★
s
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、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。
★ 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。
GND
VOUT VIN 3 2
VREF
IC501: NJU7201L55
Voltage Regulator
1
Point 1 Pin 13 of IC502
IC503: 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
IC603, 606, 701: 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
IC607, 608: 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
IC609: 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
IC702: NJM2581M
Video Amp
13 VOUT1
11 VOUT2
9 VOUT3
8 GND
10 V+3
14 V+1
12
V+2
2 NEE1
4 VEE2
6 VEE3
7 PowerSave
5 VIN3
1 VIN1
3 VIN2
75
Ω
Driver
6dB
AMP
BIAS
75
Ω
Driver
6dB
AMP
BIAS
75 Ω
Driver
6dB
AMP
BIAS
REF
IC601, 602, 901: LA7956
Video Switch
1 2 3 4 5 6 7 8 9
VIDEO
OUT
A B VIN1 GND VIN2 VCC VIN3 VIN4
DRIVER
6dB
AMP
CONTROL
4 INPUT 1 OUTPUT
VIDEO SWITCH
Point 2 Cathode of D501 and Pin 12 of IC502
POWER ON
(Connect the power cable)
POWER OFF
(Disconnect the power cable)
A D501
B IC502
1
2
B
A
4.9
4.9
3.9
4.0
4.0 4.0
7.5 4.1
4.1
0 0
4.0
4.9
4.9
5.9
5.9
0.3
0 0
0.1
11.5
3.9 3.9
4.9
5.5
0.5
11.2
0 0
4.9
4.9
4.9
4.9
11.2
11.2
11.5
11.5
5.9
5.9 5.9
5.9
6.5
6.5
6.9
6.9
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0 0
0
4.2
4.2
4.2
1.5
1.1 1.9
5.0
5.7
5.6
5.6
5.6
5.6 4.1 4.8
4.8
4.9
4.9
4.8
4.8
4.7
4.7
4.7
4.7
4.8
4.8 4.8
4.8
4.8
4.8
4.8
4.8
4.8
4.8
-11.6
-11.6
-11.6
4.8
4.1
4.8
4.8
4.8
4.8
4.8
4.7
4.1
0.1
0.1
0.1
0.1
0.1
0.1
0.5
0.5
0
0
0.1
0
0.1
0.1
0.1
0.1
0.1 0.1 0.1
4.7 4.9
4.8 4.8 4.8 4.8 4.7
4.7 4.8 4.8 4.8 4.9
4.9
4.9 4.9 1.5 1.5 4.8 4.8 4.8
2.5 2.4 0
4.8
0
0
0.1 0.1
0 0 4.8
4.8
0.1
0.1
4.9 4.9 4.9 4.9 4.9 4.9 5.0 0 5.1 0.1 0.1
3.7
2.7
0.4
1.5
4.8
4.8
1.2
0
0.9
4.8
4.8
4.8
2.9
0.1
0.4 1.5
5.1
4.9
0
0
0 0
10.0
11.8
1.1
0.1
0.4
-0.5
-0.5
-0.5
-0.4
-0.4
0.4
0
0
0
0
3.6
2.6
2.7
2.7 2.7
4.9
4.9
4.9
4.9
4.9
4.5
-4.9
4.9
0
0.2
0
5.2
5.2
4.9
4.9
-4.9
-4.9
0.3
0.3
-0.3
0.4
0.4
0.4
1.0
-0.6
0.1
0.1
0.1
0.1
0.1
0.1
0.1
-0.4
4.9
4.9
4.9 4.9 4.9
4.9 4.5
4.5
4.5
-1.1
-0.4
-0.6
4.9
5.5 5.5
6.6
0.1
0
6.1
6.4
7.1
4.9
4.9
4.9
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
4.9
-4.9
-4.9
-4.9
-4.9
-4.9
4.8
4.9
0.7
0
MICRO COMPUTER
Y/C MIX
Y/C SEPARATION
S-SIGNAL DETECT
Y-INPUT
SELECTOR
C-INPUT
SELECTOR
INPUT
SELECTOR
Y/Cb/Cr
SELECTOR
x: NOT USED
O: USED / APPLICABLE
x: NOT USED
O: USED / APPLICABLE x: NOT USED
O: USED / APPLICABLE
Page 76
to FUNCTION (1)
F2
P
age 82
to MAIN (2)
H10
P
age 82
to MAIN (1)
F1
Page 80
to OPERATION (1)
E8 Page 75
to DSP
G1
U, C, A models only