Yamaha DM2000 Service Manual page 72

DM2000
HD74LV4053AFPEL (IS405300)
DSP: IC060, 062
JK2: IC752, 753
Triple 2-Channel
Multiplexer/Demultiplexer
Switches IN/OUT
Y1 1 Y1 V
- do. - Y0
2 Y0
- do. - Z1
3 Z1
Commons OUT/IN
4 Z
Z
Swiches IN/OUT
5 Z0
Z0
Control Inhibit
6 INH
-DC Voltage Supply
7 VEE
- do -
8 V
SS
SN75124NSR (XV930A00)
JK1: IC101
Triple Line Receiver
1A
1
1B
2
2R
3
2S
4
2A
5
2B
6
2Y
7
GND
8
MC26LS30DR2 (XL334A00)
JK1: IC251
Line Driver
SINGLE-ENDED MODE
EIA-423
16
SR-A
Enable AB
2
15
Input A Out A
13
SR-B
3
14
Input B Out B
12
SR-C
6
11
Input C Out C
Enable CD
9
SR-D
7
10
Input D Out D
72
TC74LVX4245FS (XU229A00)
CPU: IC127
DSP: IC010, 011, 021, 022, 028-031
Dual Supply Octal Bus Transceiver
VCCA
+DC Voltage Supply
16
DD
Commons OUT/IN Y
Y
15
- do. - X
X 14
Swiches IN/OUT X1
X1 13
- do - X0
X0
12
Control Input A
A 11
- do. - B
B 10
- do. - C
C 9
SN75C1168NSR (XU073A00)
JK2: IC751, 851
Line Driver/Receiver
Vcc
16
1S
15
1R
14
1Y
13
3A
12
3S
11
3R
10
9 3Y
DIFFERENTIAL MODE
EIA-422
Input A
3
Input B/
15
2
Out A
Enable AB
Input A
Out B
14
11
7 Out C
Input D
Input C/
Out D
10
6 Enable CD
Input D
Vcc 1 Gnd 5
V 8 Mode 4
EE
1 24 VCCB
0
2 VCCB
DIR 1 A 23
A1
3 22 /G
2 B
A2 B1
4
3 D 21
A3
5
4 D 20 B2
A4
6
5 G2 19
B3
A5
7
18
6 G1
B4
A6 8 7 15 B5
17
A7 9 16
8 14
B6
A8 10 9 13 15
B7
GND 11 14
10 12 B8
11
GND 12 13
GND
1B 1 16 Vcc
2
15
1A 1D
3 14
1R 1Y
4
1DE 13 1Z
5
2R 12 2DE
6 11
2A 2Z
7
2B 10 2Y
8
GND 9 2D
1
Vcc 16 SR-A
2 15
Output A
3 Output B
14
Mode 4
13 SR-B
GND 5
12
SR-C
6
11
Output C
7 10 Output D
SR-D
V 8
EE 9
SN75121NSR (XU816A00)
JK1: IC151
Dual Line Driver
1A 1
1B 2
1C 3
1D 4
1E 5
1F 6
1Y 7
GND 8
DS26C32ATMX (XU815A00)
JK1: IC252
JK2: IC502-505, 605
Quad Differential Line Receiver
INPUT A 1
-
+
INPUT A 2
OUTPUT A
3
ENABLE 4
OUTPUT C 5
INPUT C
6
+
-
INPUT C 7
GND 8
Inputs
Operation Vcc V Mode A B C D
EE
Differential 0 0 0
+5.0 GND
(EIA-422-A)
0 1 0
0 X 1
0 1 0
0 0 0
0 1 0
+5.0 -5.0 1 0 0
Single-Ended
(EIA-423-A) 1 1 0
1 0 1
1 0 0
1 0 0
X 0 X X X X X X
X = Don't Care
Z = High Impedance (Off)
16 Vcc
15 2F
14 2E
13 2D
12 2C
11 2B
10 2A
9 2Y
16 Vcc
15
INPUT B
14 INPUT B
13 OUTPUT B
12 ENABLE
11
OUTPUT D
10 INPUT D
INPUT D
9
Outputs
A B C D
0 0 0 1 1 0
0 1 1 0 0 1
0 1 Z Z 0 1
0 0 1 0 1 0
0 1 0 1 0 1
1 X 1 0 Z Z
0 0 0 0 0 0
0 0 1 0 0 0
0 0 0 1 0 0
1 0 0 0 1 0
0 1 0 0 0 1
Z Z Z Z