91
Date:
May 7, 1996
Sheet
5
o
f
11
Size
Document Number
REV
B
ZD5015
C
Title
SCHEMATIC, MAIN BOARD 9180
(404) 587-4040
Roswell, Georgia 30076
33 Mansell Court
AVL Scientific Corp.
2
1
D8
1N4004
2
1
D9
1N4004
2
1
D10
1N4004
PHASEA
PHASEB
PHASEC
+VS
+VS
+VS
IN1
2
ENA
1
IN2
9
IN3
12
ENB
11
IN4
19
OUT1
3
OUT2
8
OUT3
13
OUT4
18
GND
5
GND
6
GND
15
VSS
20
VS
10
GND
16
SENSE1
4
SENSE2
7
SENSE3
14
SENSE4
17
U9
L293E
1
2
C46
100uF/50V
1
2
C41
0.1uF
2
1
D7
1N4004
+VS
SGND
SGND
PUMP DRIVER
A
4
INH1
5
B
6
C
7
INH2
8
D
9
SENSE1
14
SENSE2
13
VREF
15
CW/CCW
17
STEP
18
HALF/FULL
19
RESET
20
CONTROL
11
ENABLE
10
GND
2
VS
12
OSC
16
SYNC
1
HOME
3
U10
L297
1
2
C42
0.1uF
1
2
C45
0.1uF
+VS
VCC
SGND
SGND
PUMPSTEP
VCC
1
2
R23
22K
1
2
C43
3.3nF
1
2
C47
10uF/16V
PUMPEN
VCC
SGND
1
2
C44
0.1uF
ZS1
DIP20
ZS2
DIP20
1
2
R24
10K 1%
1
2
R32
562 1%
VCC
SGND
1
2
R25
1
1
2
R26
1
2
1
D11
1N4004
SGND
SGND
SGND
SGND
2
1
D12
1N4004
2
1
D13
1N4004
2
1
D14
1N4004
PHASED
SGND
SGND
SGND
DOOR
2
3
7
85
6
41
U11
LM311N
1
2
R28
10K
1
2
R29
10K
1
2
R33
2.2K
1
2
R31
100K
VCC
VCC
VCC
DOOR SWITCH DETECT
1
2
R30
33K
VCC
SGND
SGND
DCLOSED
SGND
DGND
GND
1
2
R27
100
DLED+
VCC
SBC PCB - PUMP MOTOR DRIVER/DOOR DETECT - 9180, 81