Yamaha YMC-700 Service Manual page 82

A B C
YMC-700/YMC-500
DIGITAL 8/8
1
Q Q
3
2
to DIGITAL 5/8
to DIGITAL 4/8
3
3.4 3.4
0.4 0.4
4
5
T E
L 1 3
6
to DIGITAL 1/8
7
8
CB382
9
Page 87 L7
to MAIN_W2001
w w w
10
★ All voltages are measured with a 10MΩ/V DC electronic voltmeter.
★ Components having special characteristics are marked
and must be replaced
with parts having specifications equal to those originally installed.
★ Schematic diagram is subject to change without notice.
82
D E F
7 1 5
6 3
to DIGITAL 5/8
AD
CONVERTER
3.3
3.2
3.3
3.3
0 3.3
3.3 3.3
2.3
3.3
IC381
2.3
2.3 3.3 0
0.4 3.3
3.3 1.9
3.3
1.2
0.4 3.3
0 0
0 3.3
0 0
IC382
SELECTOR1
9 4 2 2 9 6 5 1 3
to DIGITAL 4/8
CB383
SUB
WOOFER
Page 83 B4
to OPERATION (2)_CB154
IC381: ADC084S021 CIMM
x a o
4-channel, 200 kSPS, 8-bit A/D converter
. i
IN1
8-Bit
IN2
SUCCESSIVE
MUX T/H
IN3 APPROXIMATION
ADC
GND
IN4
CONTROL
LOGIC
G http://www.xiaoyu163.com H
YMC-700 YMC-500
1 5
0
POINT J XL381 (Pin 7 of IC383)
JK381
6.2
IR BLASTER
3.3
IC383
J
3.3
to DIGITAL 7/8
3.3
IC386 3.3
3.3
IC386
IC386 3.3 0.9
0
0 0
3.3
3.3
to DIGITAL 5/8
0
IC386
3.3
3.3 3.0
Q Q
3 7
to DIGITAL 5/8
CB384
FRONT L
CENTER SURROUND L
Page 85 B6
to MAIN_CB50
IC382: SN74LV4051APWR
u 1 6 3
y
8-channel analog multiplexers/demultiplexers
3
COM
13
Y0
V A
CS 1 10 SCLK 14
11 Y1
A
V A 2 9 DOUT
GND
15
ADC084S021 Y2
GND 3 8 DIN
Y4 1
12
IN4 4 7 IN1 10 Y3
B Y6 2
IN3 5 6 IN2 COM 3
1
Y4 Y7 4
SCLK
Y5 5
5
CS 9 Y5 INH 6
C
DIN GND 7
2 GND 8
Y6
DOUT
4
6
Y7
INH
I J K
REMOTE CONTROL
OUT1/2
OUT3/IN
2 4
8 9
JK382
6.2 0 6.2 0 6.2
0
6.2 6.2 6.2
6.0 6.2 6.2 6.0 6.2 6.2 6.0 6.2
3.3 0
6.2
0
0
0.9
0
0
to DIGITAL 4/8
6 3 1 5 1 5 0 8
CB381
CB385
ANALOG IN
Page 86 E9 Page 84 N6
to MAIN_CB101 to MAIN_W1
m
c o
IC384: NJM2386DL3-05 (TE1)
IC385: 74LVC245APW,118
Low dropout voltage regulator with ON/OFF control
Octal bus transceiver with direction pin
. with 5 V tolerant input/outputs (3-state)
V
IN V
OUT
DIR
A0
A1
INPUTS ON
16 V Bandgap
CC CHANNEL
INH C B A Reference A2
15 Y2
L L L L Y0
14 Y1 A3
L L L H Y1
13 ON/OFF
Y0 Cont
L L H L Y2 control A4
12
Y3
L L H H Y3
11 A A5
L H L L Y4
10 Over Voltage Thermal Over Current
B
L H L H Y5 Protection Protection Protection A6
9 C
L H H L Y6
A7
GND
L H H H Y7
GND
H X X X None
L M N
2
9 8 9 9
IC384
6.2 5.1
0
9 2 4 9 8 2 9 9
to DIGITAL 4/8
IC386: 74LVC125APW
Quad buffer/line driver with 5 V tolerant input/outputs 3-state
1OE 1 14 Vcc
1 20 Vcc
1A 2 13 4OE
2 19 OE
3 18 B0 1Y 3 12 4A
4 17 B1 2OE 4 11 4Y
5 16 B2
2A 5 10 3OE
6 15 B3
2Y 6 9 3A
7 14 B4
GND 7 8 3Y
8 13 B5
9 12 B6
10 11 B7