Avtech AV-1023-C, Instructions Manual

Page: 30 / 35

PCB 134B - MAIN BOARD - TIMING A
1 2 3 4 5 6
A
B
C
D
6 5 4 3 2 1
D
C
B
A
Title
Revision Date
24-Mar-2020
Z:\engineering\pcb\134\1023-2002.ddb - 134B\timingA.sch
AV-1023-C, CH A, DELAY AND PW
0
VCC
GND
VCC
A
9
B
10
CLR
11
Cext
6
Rext/Cext
7
Q
5
Q
12
U1B
74221
VCC
R15
1.5K
CCW
W
CW
1
2
3
R4
25K POT
VCC
6
10 1
9
2
5
K5
G5V-1-12VDC
PWA2
6
10 1
9
2
5
K8
G5V-1-12VDC
PWA3
6
10 1
9
2
5
K11
G5V-1-12VDC
PWA4
6
10 1
9
2
5
K16
G5V-1-12VDC
PWA5
6
10 1
9
2
5
K19
G5V-1-12VDC
PWA6
6
10 1
9
2
5
K21
G5V-1-12VDC
PWA7
6
10 1
9
2
5
K2
G5V-1-12VDC
PWA8
R29
100
A
1
B
2
CLR
3
Cext
14
Rext/Cext
15
Q
13
Q
4
U1A
74221
TRIG
VCC
R10
1.5K
CCW
W
CW
1
2
3
R3
25K POT
VCC
6
10 1
9
2
5
K4
G5V-1-12VDC
DA2
6
10 1
9
2
5
K7
G5V-1-12VDC
DA3
6
10 1
9
2
5
K10
G5V-1-12VDC
DA4
6
10 1
9
2
5
K15
G5V-1-12VDC
DA5
6
10 1
9
2
5
K18
G5V-1-12VDC
DA6
6
10 1
9
2
5
K20
G5V-1-12VDC
DA7
C2
0.1uF
COMPL-A
1
2
3
U2A
74ACT86
TTL-A
0V
+3V
0V
+5V
LOW FOR NORM
C4
0.1uF
C7
22pF
C11
270pF
C20
1800+1000+220pF
C24
22000+6800+3300pF
C12
270pF
C21
1800+1000+220pF
C25
22000+6800+3300pF
C30
0.22+0.1uF
C33
2.2uF+1.0uF
C39
22+10uF
C31
0.22+0.1uF
C34
2.2uF+1.0uF
C40
22+10uF
C9
22pF
R16
1K
VCC
C45
47uF,50V,P5570-ND