Yamaha AVR-S80 Service Manual page 55

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