Yamaha VS-10 Service Manual page 39

A B
SCHEMATIC DIAGRAM ( 1/2 DIGITAL )
C page E-42/J-40
1
1
MAIN (1)
IC1 : NJM2904M
Dual OP-Amp
V–
Q1 Q6
Q2 Q3
Q5
–
Q4
Q7
INPUTS
Q11
Q13
+
Q12
Q10
Q8 Q9
2
5.1
0
0 0
0
5.1
0.1 0
0
5.1
0 0.1
0
2.3
3 0 0
0 5.1
0
0
5.1
5.1
0.7
0
0
4
0 0 0 0
0
0
0
0
0
0
0
5.1
5.1 0
5.1
2.5
3
5.1
0 2.5 2.5
5
4.8 2.4
6
7
D
DIGITAL (2)
7
page E-45/J-43
8
PIN CONNECTION DIAGRAM OF TRANSISTORS, DIODES AND ICS.
DTC143EKA 2SC4391 1SS355 NJM2904M HD74HC02FPEL
2SC3326 MA8051-M M5220FP
Anode
DTC144EKA MA8062-H S-29390AFJA
2SA1037
C
8 4
14
9 E
B 1
C Cathode
B
E
C D E
IC2 : HD74HC02FPEL
Quad 2 Input NOR
14 13 12 11 10 9 8
OUTPUT
1 2 3 4 5 6 7
3.2
2.5
2.5
1.6
0
2.5
2.4
0.7
5.1
0
3.2
0
0
0
0
0
0
5.1
5.1
0
2.4
Point 3
Pin 3 of IC3
YM3436DK YSS918D-F IS61C1024-20J
80 51
CS4227-KQ M3021BFCFP
81
33 23 50
34 22
7
44 100
12 31 32
1
1
1 11 1 30
F G
Point 4
Pin 28 of IC6
0
2.5
2.5
0
0
0
2.5
2.5
2.5
3.2
0
5.0
0
5.0
0 0
5.0 1.5
2.5
0
4.8
0
0
0
IC14 : uPC29M33T-E1
Voltage Regulator
1 INPUT
Safety Drive
Limiter
Amp.
3 OUTPUT
Excessive Electric
Current Protection
2 GND
IC6 : CS4227-KQ
6ch 20bit CODEC
3 4 5 6 7 40 19
PDN 8 CONTROL PORT VOLTAGE
REFERENCE
DAC#1
LRCK VOLUME
44 43 42 41 40 39 38 37 36 35 34 37 CONTROL
DAC#2
DATAUX 1 33 SDIN2 SCLK 38 VOLUME
CONTROL
HOLD 2 32 SDIN3
SDIN1 34
SCL/CCLK 3 31 CLKOUT DAC#3 VOLUME
CONTROL
SDA/CDOUT 4 30 OVL
AD1/CDIN XTO SDIN2 33
5 29 DAC#4 VOLUME
AD0/CS 6 28 XTI CONTROL
SDIN3 32
SPI/I2C 7 27 DEM
DAC#5 VOLUME
PDN 8 26 AOUT6
CONTROL
AIN3R AOUT5 SDOUT1 36
uPC29M33T-E1 9 25
DAC#6
AIN3L 10 24 AOUT4 VOLUME
SDOUT2 35 CONTROL
AIN2L 11 23 AOUT3 MONO
ADC
12 13 14 15 16 17 18 19 20 21 22 OVL 30 LEFT
MUX INPUT
ADC
GAIN
RIGHT
16 ADC
DEM 27 DEM
AGND1 CLOCK OSC/ AUXILIARY INPUT
18 DIVIDER
20 31 28 29 2 1 44 43 41
3: IN
1: OUT
2: COM
H I
0
0
0
24.1
-23.6
0
0
0
0
0
0
2.3
24.1
2.3
0
4
5.1
0
-23.6
0
2.3
0
-0.1
2.3
SW L
2.3
REAR L
0
0
0
24.1
-23.6
0
0
0
2.3 2.3
2.3 2.3
2.3
2.3
24.1
24.1
-23.6
-23.6
2.3 2.3
2.3 2.3
2.3 2.3
IC7 : IS61C1024-20J
128k x 8 High-speed CMOS Static RAM
16 CMOUT
NC 1 32 VCC
A16 2 31 A15 512 X 2048
AOUT1 A0 - A16 DECODER
21
A14 3 30 CE2 MEMORY ARRAY
22 AOUT2 A12 4 29 WE
A7 5 28 A13
23 AOUT3
VCC
A6 6 27 A8
AOUT4 GND
24 A5 7 26 A9
25 AOUT5 A4 8 25 A11 I/O
A3 9 24 OE I/O0 - I/O7 DATA COLUMN I/O
26 AOUT6
A2 10 23 A10
CIRCUIT
15 AINAUX
A1 11 22 CE1
14 AIN1L
A0 12 21 I/O7
13 AIN1R
CE1
I/O0 13 20 I/O6
12 AIN2R
11 AIN2L CE2 CONTROL
I/O1 14 19 I/O5
10 AIN3L
I/O2 15 18 I/O4 OE CIRCUIT
9 AIN3R
GND 16 17 I/O3
WE
39
J K L
VS-10
IC8~12 : M5220FP
Dual OP-Amp
1 8
OUT1 +Vcc
–IN1 2 7 OUT2
+ – + –
+IN1 3 6 –IN2
–Vcc 4 5 +IN2
CENTER L
page E-42/J-40
C
1
MAIN (1)
MAIN L
DIGITAL (1)
E-44/J-42