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Yamaha AVR-S80 Service Manual page 55

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

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