Yamaha AVR-S80, Service Manual

Page: 55 / 86

A B C D E F G H I J K L
AVR-S80/NX-SW80
55
AVR-S80 SCHEMATIC DIAGRAM (MAIN)
1
2
3
4
5
6
7
8
9
★
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.
x: NOT USED
O: USED / APPLICABLE
Point 2 emitter of Q2
and collector of Q1
POWER ON
(Connect the power cord)
POWER OFF
(Disconnect the power cord)
A Q2 E
B Q1 C
Point 1 Pin 13 of IC1
SELECTOR
Page 57
to SUB (3)
K3 Page 57
to SUB (4)
B2 Page 56
to DSP
F1
IC2: NJM78L05A-T3
Voltage Regulator
INPUT
OUTPUT
GND
IC3: LC78211
Analog Function Switch
1
2
3
4
5
6
7
8
9
10
11
30
29
28
27
26
25
24
23
22
21
20
19
16
12
18
17
14
15
13
LEVEL SHIFTER
LATCH
CONTR
OL
SHIFT REGISTER
ZZ
ZZ
ZZ
L1
L2
L3
L4
LCOM1
L5
L6
L7
L8
RES
S
VDD
VSS
VEE
LCOM2
LCOM3
R1
R2
R3
R4
RCOM1
RCOM2
RCOM3
R5
R7
R8
D1
CL
CE
R6
IC4, 25~27, 29~32: NJM2068MD
IC28 : BA15218F
Dual OP-Amp.
– +
OUT
1
–IN
1
–V
CC
+V
CC
OUT
2
1
2
3
4 5
+IN
1
–IN
2
+IN
2
– +
6
7
8
INPUT
OUTPUT
COMMON
IC5: NJM78M12FA
IC9: NJM7805FA
Voltage Regulator
IC6: NJM79M12FA
IC8: NJM79M05FA
Voltage Regulator
COMMON
OUTPUT
INPUT
IC7: NJM78M05FA
Voltage Regulator
V
OUT
V
IN
GND
12 LIN2
9 LOUT
8 VREF
VREF
VREF
256
256
Reset
Vref
Generator
&
Reset
pulse
Generator
2 SDATAO
20 SDATAI
19 CSN
1
SCLK
16 TE
18 ZCEN
S/P
Register
Control
Register
L
Zero Cross
Detection
IC34~36: YAC520-EE2
Stereo Digital Volume Controller
11 LIN1
4 DVSS
3 DVDD
13 AVSS
6
AVDD
17 ICN
+
–
R
14 RIN2
7 ROUT 15 RIN1
+
–
16
MAIN (2)
MAIN (1)
SELECTOR
MAIN CPU
POWER DOWN DETECT
RESET
VOLTAGE
MONITOR
MUTE
VOLUME CONTROL
PRE MUTE
BASS
BOOST
P
age 57
to SUB (3)
K6
P
age 57
to SUB (3)
K7
Page 57
to SUB (1)
B4
P
age 57
to SUB (4)
B3
※ J5はDGNDの接続変更用です。
* J5 is used when changing connection of DGND.
8
8
4
4
8
4
8
4
4
8
8
4
8
4
8
4
8
4
2
DVD/CD L (ANALOG IN)
FRONT L
REAR L
CENTER
1
0.1
0
0
0
0
0
0
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0
0.1
0.1
0.1
0
0.1
0.1
0.1
0
0
0
0
0
11.8
-12.1
11.8
-12.1
11.8
0
0
0
0
0
11.8
11.7
-12.1
-12.0
-12.0
11.7
0.2
0.2
0.1
0.1
0.1
11.6
-12.0
0.1
0.1
0
0
0.1
0.1
11.4
0.1
0
0
0.1
-11.7
0.1
0.1
0.1
-11.9
-11.9
0.1
0.1
0
-12.0
11.6
0.1
0.1
5.0
4.4
0.1
0
0
0.1
0.1
5.1
-12.0
11.6
0.2
0.2
-12.0 11.6
0.1
0
0
0.2 0.2
0
0
0.2
0.2
0.2
0.2
5.0
4.4
3.9
3.9
3.9
-18.1
0
0
0
0
0
0.1
0.1
0
0
0.1
5.0
12.8
12.8
17.1
0
0
0
0
-17.8
17.1
-11.8
8.9
17.0
4.4
4.2
0
10.7
-49.1
-33.9 -33.9
-18.1
-5.2
10.7
-30.2
-22.7
-30.2
-30.8
-49.1
-5.2
-5.2
0
0
10.7
6.3
8.4
5.7
5.7
12.7
0
0
0
0
0
0
0
0
0
0
0
4.9
4.9
4.9
4.9
0
0
0
0
3.9
0
0
0
4.8
4.5
0
5.0
5.0
0
2.9
3.9
0
0
5.1
4.9
4.9
4.9
4.9
0
0
0
4.9
0 4.9 0 0 4.9
0
0.2 4.9
0 0 5.0
4.8 0.1 4.9 4.7
0
4.2
0
4.9 4.9 2.1
0
2.4 5.0
0 0
0
0 ~ ~ ~ 0 0 0 0
0 4.9
0
0 5.0 0 0 0 0 0 4.8 0 4.8 4.8 4.8 4.8 0 0 0 0 0.1 4.6
4.8
0
5.0
0 6.2
0
13.0
8.4
3.7
17.1
0
0.7
11.8
-12.1
5.1
-5.0
5.0
0
10.2
9.0
0
0
0
4.8
5.7
0
6.3
5.1
4.9
12.7
12.0
6.2
6.8
5.0
0
0
0
0
0.8
0.8
0.1
0.1
0
0
0.8
0.8
0.1
0.1
0
0
0.8
0.8
0.2
0.2
5.1
4.9
0
0.1
0.1
0.1
0
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0
2.6
2.6
2.6
5.1
0
0
5.1
0
0
2.6
2.6
0
2.6
2.6
4.9
0
0.1
4.9
0
2.6
2.6
2.6
5.1
0
0
5.1
0
0
2.6
2.6
0
2.6
2.6
4.9
0
0.1
4.9
0
2.6
2.6
2.6
5.1
0
0
5.1
0
0
2.6
2.6
0
2.6
2.6
4.9
0
0.1
4.9
11.8
5.1
0
0 0
0 0
AC5.4
AC8.5
AC28.9
AC12.3
A
B
EUROPEAN