Yamaha DM1000 Service Manual page 61

SN75C1168NSR (XU073A00)
JK1: IC203
JK2: IC701
Line Driver/Receiver
1
1B 16 Vcc
2
15
1A 1D
3
14
1R 1Y
4 13
1DE 1Z
5 12
2R 2DE
6
11
2A 2Z
7
2B 10 2Y
8 9
GND 2D
TC7SH04FU (XS775A00)
JK1: IC255, 256
MAIN: IC025, 101, 139, 145, 603
Inverter Gate
NC 1 5 VCC
IN A 2
3 4
GND OUT Y
MC26LS30DR2 (XL334A00)
JK1: IC002
Line Driver
SINGLE-ENDED MODE DIFFERENTIAL MODE
EIA-423
16
SR-A
Enable AB
2
15
Input A Out A
Input A
13
SR-B
3
14
Input B Out B
12
Input D
SR-C
6
11
Input C Out C
Enable CD
9
SR-D
Vcc
7
10
Input D Out D
V
EE
DS26C32ATMX (XU815A00)
JK1: IC001
Quad Differential Line Receiver
1
INPUT A
INPUT A 2
OUTPUT A 3
ENABLE
4
OUTPUT C
5
INPUT C 6
INPUT C
7
GND
8
TC7SH08FU (XR680A00)
MAIN: IC024
2 Input AND Gate
IN B
1
IN A
2
3
GND
1
EIA-422 Vcc
Input A 2
3
Input B/
15
3
2
Out A
Enable AB
Out B
14
Mode
4
GND 5
11
7 Out C
Input C/
Out D
6
10
Enable CD
6
Input D
7
1 Gnd 5
V
8 Mode 4 8
EE
16 Vcc
-
+
15
INPUT B
14 INPUT B
13
OUTPUT B
12
ENABLE
11
OUTPUT D
+
-
10 INPUT D
INPUT D
9
Vcc
5
4
OUT Y
16 SR-A
Operation
15
Output A Differential
(EIA-422-A)
14 Output B
13
SR-B
12
SR-C
Single-Ended
(EIA-423-A)
11
Output C
10 Output D
SR-D
9
X = Don't Care
Z = High Impedance (Off)
DM1000/MB1000/SP1000
TC7S04F (XM182A00)
ADA: IC954
HAAD: IC951
Inverter Gate
NC 1 5 VDD
IN 2
3 4
VSS OUT
TC7SH32FU (TE85L) (XW633A00)
MAIN: IC023, 026
TC7SET32FU (XW814A00)
MAIN: IC146
Input OR Gate
Vcc
IN B
1 5
IN A
2
3 4
OUT Y
GND
Inputs
Vcc V Mode A B C D
EE
0 0 0 0 0
+5.0 GND
0 1 0 0 1
0 X 1 0 1
0 1 0 0 0
0 0 0 0 1
0 1 0 1 X
1 0 0 0 0
+5.0 -5.0
1 1 0 0 0
1 0 1 0 0
1 0 0 1 0
1 0 0 0 1
X 0 X X
X X X X
Outputs
A B C D
0 1 1 0
1 0 0 1
Z Z 0 1
1 0 1 0
0 1 0 1
1 0 Z Z
0 0 0 0
1 0 0 0
0 1 0 0
0 0 1 0
0 0 0 1
Z Z Z Z
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