5-49
– MD-39 Board –
IC1900
LB1644
1
2
3
6
7
9
10
11
8
14
13
15
16
V
Z
1
IN4
IN1
OUT4
OUT1
V
CC
2
GND
12
GND
V
CC
1
IN2
IN3
OUT2
5
GND
4
GND
OUT3
V
Z
2
INPUT LOGIC BLOCK
INPUT LOGIC BLOCK
PRE
DRIVER
PRE
DRIVER
TSD
IC1901
STA506A
SWITCH
SWITCH
SWITCH
SWITCH
1
2
3
4
5
6
7
8
9
10
IC1902
LM339NS-E20
1
2
4
3
5
6
7
14
13
11
2
10
9
8
1 OUT
2 OUT
2 IN–
2 IN+
1 IN–
1 IN+
VCC
3 OUT
4 OUT
4 IN+
4 IN–
3 IN+
3 IN–
GND