Yamaha RX-SL80 Service Manual page 60

A B C
RX-SL80
SCHEMATIC DIAGRAM (INPUT 2/2)
1
Page 64 G2 Page 64 K2
to POWER (10) to POWER (11)
2
4.8 -11.8
-11.6
5.0
11.8
0
3 0
0
0
-11.8
0
0
-11.8
0
0
0
0
-12.0
4
FRONT L
0 0
0
0
0
0
5
6
10.5 11.8
10.3
10.3
0
7
5.6 11.8
5.0
5.0
0
8
9
IC418: µPC29M33T-E1
IC417: PQ025EN5MZPH
Voltage Regulator
Voltage Regulator
1 INPUT
Vin 1 3 Vo V IN
Safety Drive
Limiter
2 Vc
Amp.
5
3 OUTPUT GND
10
Excessive Electric
Current Protection
2 GND
60
D E F
Page 59 G1
to DIGITAL
0
-11.8
0
0
0
0 0
0 7.0
0 0
-7.0 0
0 0 0
7.0 0
-11.8
0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 7.0
0 0
0
-7.0
0
2.5 0
0
4.9 0
0 0
0 4.8
2.5
0
0
0
4
5.0
2.5
IC416: PQ1CG21H2F IC414: NJM78M05DL1A
Voltage Regulator Voltage Regulator
INPUT
1 2 V
OUT
Voltage ON/OFF
regulator circuit
PWM COMP.
5
ON/OFF OUTPUT
+
–
Soft
start
Q
F/F R Oscillator
Over current
S
protection
circuit
ERROR AMP.
– 4 Oadj
+
V GND
Over heat REF
protection
circuit
3
COM
G H
Page 63 J8 Page 59 C1
to POWER (4) to DIGITAL
5.6
FRONT L
11.1
0
0
0
0 0 0
0 0
0
0
0
0
0
0 0
0 0 0
-11.3
11.1
0
0
0
0
0
0 0
0 0
0
0
0
0 0
5.6
-11.3
0
0
0 0.1
0
-5.7
CENTER
0 11.1
0
0
SURROUND L
0
0
0
-11.3
11.9 18.8
0
0
0
-12.0 -15.0
7.0 12.0
4.9
7.7 18.2
0
0
7.7
0
-5.0 -18.8
0
-7.7
-7.7
-7.0 -12.2
5.0
0
2.5 4.7
2.5
0
IC413: NJM79M12DL1A IC412: NJM78M12FA
IC415: NJM79M05DL1A Voltage Regulator
Voltage Regulator
INPUT
COMMON
OUTPUT OUTPUT
INPUT
COMMON
I J K
Point r (Pin 29 of IC302)
V : 2V/div, H : 40nsec/div
DC, 1 : 1 probe
0V
-11.9
-11.6
4.8
0
-0.1
-0.1
18.8 -19.5
-0.1
AC 30.6
AC 11.0
AC 5.9
6.2
12.5 0
6.2
3.3 4.7
3.3 4.7
0
0
x: NOT USED
O:USED / APPLICABLE
IC406, 407, 419: TC74HC4053AF
Analog Multiplexer/Demultiplexer
INHIBIT VDD
6 16
A 11 INPUT STATES
LEVEL BINARY TO 1-OF-8 "ON" CHANNEL (S)
B 10 INHIBIT C B A
CONVERTER DECODER WITH INHIBIT
C 0 0 0 0 0X, 0Y, 0Z
9
VSS 0 0 0 1 1X, 0Y, 0Z
8
0 0 1 0 0X, 1Y, 0Z
VEE 7
0 0 1 1 1X, 1Y, 0Z
0X 12 SW
14 X-COM 0 1 0 0 0X, 0Y, 1Z
1X 13 SW
0 1 0 1 1X, 0Y, 1Z
0Y SW
2 0 1 1 0 0X, 1Y, 1Z
Y-COM
15
1Y
1 SW 0 1 1 1 1X, 1Y, 1Z
0Z 1 X X X NONE
5 SW
4 Z-COM
1Z 3 SW
L M N
IC401: BD3842FS-E2
Function Switch
1 24
2 23
LOGIC
3 22
4 21
5 20
19
6
7 18
17
8
9 16
10 15
11 14
12 13
IC402: BA15218F
IC408, 409: µPC4570G2
IC411: NJM2068MD-TE2
Dual OP-Amp.
OUT 1 1 8 +V CC
2
–IN 1 7 OUT 2
+ – + –
+IN 3 6 –IN
1 2
–V 4 5 +IN
CC 2
IC403: BD3815KS
Audio Sound Processor
42 41 40 39 38 37 36 35 34 33 32 31 30 29
43 TONE 28
INFRA GND8
INFLA 44 27 OUTSW
SW1
+
A
INSWA 45 – 26 GND7
B +
–
46 25
INSRA + OUTSR
A –
+
B
INSLA 47 24 GND6
–
+
INCA 48 A 23 OUTSL
–
B +
–
INSBA 49 22 GND5
SW2
+
A –
INFRB 50 A 21 OUTC
B +
B –
+
INFLB 51 20 GND4
A –
A +
INSWB 52 B 19 OUTSB
B –
+
SW3
–
INSRB 53 A 18 VCC
B +
A
–
54 + 17
INSLB B GND3
–
A
INCB 55 B 16 VEE
INSBB 56 15 VDD
LOGIC
1 2 3 4 5 6 7 8 9 10 11 12 13 14
IC404: LC72722PM
RDS Signal Processor
1 5 6
VDDA 3 CLOCK 14 VDDD
PLL
RECOVERY
REFERENCE (57 kHz)
(1187.5 Hz)
VOLTAGE
VSSA 4 15 VSSD
VREF
57 kHz DATA
MPX IN ANTIALIASING SMOOTHING
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 (4.332 MHz)
T1
7 MEMORY
T2 CONTROL
8 TEST SYNC SYNC
T3 DETECT-1 DETECT-2
9 OSC/DIVIDER
T4
10
11 16 17 13 12
IC405: BD3812F-E2
Audio Sound Processor
IN1 1 14 OUT1
+
–
AGND1 2 13 OUT2
IN2 3 12 SEL
+
–
AGND2 4 11 DGND
VEE 5 10 MUTE
AGND3 6 LOGIC 9 DA
VCC 7 8 CL
* All voltages are measured with a 10M Ω /V DC electronic volt meter.
* Components having special characteristics are marked Z 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。
* Z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。
O