Yamaha HTR-5740 Service-Handbuch - Seite 28

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Yamaha HTR-5740 Service-Handbuch
A
B
C
SCHEMATIC DIAGRAM (FUNCTION 2/2)
RX-V550
1
2
4.9
-4.9
4.8
4.9
4.9
0.7
0
4.9
3
4.9
-4.9
4.9
4.9
Y/Cb/Cr
0
0
SELECTOR
0
4.9
0
-4.9
0
0
0
4.9
0
0
-4.9
0
0
4.9
-4.9
0
4
0
4.9
0
0
0
5
6
C-INPUT
SELECTOR
7
Y-INPUT
SELECTOR
11.5
5.9
5.9
8
5.2
6.5
6.9
0.1
0
11.5
5.9
5.9
5.2
6.5
6.9
0.1
Y/C SEPARATION
0
9
0.1
4.9
4.9
4.9
0.1
0.1
0.1
-0.4
0.1
4.5
-0.6
4.5
-1.1
4.9
0.1
0
0
-4.9
0.3
-4.9
0.3
-0.4
0.1
10
# All voltages are measured with a 10MΩ/V DC electronic volt meter.
# Components having special characteristics are marked s and must be replaced
s
with parts having specifications equal to those originally installed.
# Schematic diagram is subject to change without notice.
D
E
F
x: NOT USED
O: USED / APPLICABLE
INPUT
IC702: NJM2581M
Video Amp
SELECTOR
PowerSave
11.2
5.5
5.5
4.9
IC601, 602, 901: LA7956
6.1
6.6
Video Switch
0.1
0
11.2
7.1
6.4
4.5
4.9
4.9
0
0
0
0
0
0
0
0
-4.9
0
0
0.4
0
0
0
4.9
4.2
0
0
0
1.5
S-SIGNAL DETECT
-0.5
4.9
2.7
2.7
0
2.7
2.6
3.6
0.1
0
4.9
0
4.9
0.1
0
0.1
0
0.1
0
4.5
4.9
Y/C MIX
4.9
4.9
4.9
0
0
0.4
1.0
0.1
-0.6
-0.3
0.4
0.4
0
0.2
0
0.1
G
H
x: NOT USED
O: USED / APPLICABLE
6dB
75Ω
VIN1
1
Driver
14
V+1
AMP
BIAS
2
NEE1
13
VOUT1
75Ω
VIN2
3
6dB
12
V+2
AMP
Driver
BIAS
VEE2
4
11
VOUT2
6dB
75Ω
VIN3
5
Driver
10
V+3
AMP
BIAS
VEE3
6
9
VOUT3
7
REF
8
GND
6dB
AMP
5.0
4 INPUT 1 OUTPUT
DRIVER
CONTROL
VIDEO SWITCH
1
2
3
4
5
6
7
8
9
VIDEO
A
B
VIN1
GND
VIN2
VCC
VIN3
VIN4
OUT
5.6
10.0
4.9
5.6
5.1
0
5.6
5.6
4.1
4.8
4.2
4.2
1.9
1.1
1.1
-0.5
0.1
0.4
-0.4
-0.4
-0.5
U, C, A models only
0
IC607, 608: TK15420M
Video Amp
OUT A
1
8
VCC
2
–IN A
7
OUT B
+
–
+
–
+IN A
3
6
–IN B
VEE
4
5
+IN B
IC609: TC74HCU04AF
Hex Inverters
1A
1
14
VCC
1Y
2
13
6A
2A
3
12
6Y
IC603, 606, 701: TC74HC4053AF
2Y
4
11
5A
Analog Multiplexer/Demultiplexer
3A
5
10
5Y
INHIBIT
VDD
3Y
6
9
4A
6
16
GND
7
8
4Y
A
11
LEVEL
BINARY TO 1-OF-8
B
10
CONVERTER
DECODER WITH INHIBIT
C
9
VSS
8
VEE
7
0X
12
SW
1X
13
SW
0Y
SW
2
1Y
1
SW
0Z
5
SW
1Z
3
SW
I
J
K
Point 1 Pin 13 of IC502
x: NOT USED
O: USED / APPLICABLE
Page 76
to FUNCTION (1)
11.8
5.7
A
0
0.1
2
4.8
0
0
4.8
4.7
4.8
4.7
2.9
2.7
MICRO COMPUTER
1.5
0.4
3.7
4.7
0.1
4.7
1.5
4.8
0.4
4.8
0
0.9
4.8
4.8
0
1.2
1
4.8
4.9
B
4.9
4.8
4.8
Page 80
E8
to OPERATION (1)
IC501: NJU7201L55
Voltage Regulator
VIN
2
3
VOUT
INPUT STATES
"ON" CHANNNEL (S)
INHIBIT
C
B
A
0
0
0
0
0X, 0Y, 0Z
0
0
0
1
1X, 0Y, 0Z
14
X-COM
0
0
1
0
0X, 1Y, 0Z
0
0
1
1
1X, 1Y, 0Z
Y-COM
0
1
0
0
0X, 0Y, 1Z
VREF
15
0
1
0
1
1X, 0Y, 1Z
0
1
1
0
0X, 1Y, 1Z
4
Z-COM
1
0
1
1
1
1X, 1Y, 1Z
GND
1
X
X
X
NONE
L
M
N
RX-V550/HTR-5750/RX-V450/HTR-5740/DSP-AX450
Point 2 Cathode of D501 and Pin 12 of IC502
A D501
B IC502
POWER ON
POWER OFF
(Connect the power cable)
(Disconnect the power cable)
F2
4.8
4.8
-11.6
4.8
4.8
-11.6
4.8
4.8
-11.6
4.8
4.1
4.8
4.8
0
0
4.8
4.8
4.8
4.8
4.8
0.1
4.1
4.7
0.1
0.5
0.1
0.1
0.1
0.5
0.1
Page 75
G1
to DSP
1
5
6
VDDA
3
+
CLOCK
14
VDDD
IC503: LC72722
PLL
RECOVERY
REFERENCE
(57kHz)
(1187.5Hz)
RDS Decoder
VOLTAGE
VSSA
4
15
VSSD
VREF
57kHz
ANTIALIASING
SMOOTHING
DATA
MPX IN
2
bpf
19
RDS-ID
FILTER
FILTER
DECODER
(SCF)
DO
20
CL
21
18
SYNC
RAM
ERROR CORRECTION
SYNC/EC
DI
22
CCB
(24 BLOCK DATA)
(SOFT DECISION)
CONTROLLER
24
SYR
CE
23
CLK(4.332MHz)
T1
7
MEMORY
CONTROL
T2
8
SYNC
SYNC
TEST
DETECT-1
DETECT-2
T3
9
OSC/DIVIDER
T4
10
11 16 17
13
12
77