Epson FX-80 Technical Service Data page 36

LOGIC
PIN
IC IC PIN PIN
PIN
PIN
PIN
NO.
1
2 IB NO. 2A
NO. 2A NO.
2C
NO. 3A
NO.
3A
1
(4) (4)
"
P
1
P
13 P
1
P
1
P
13
P
2 P
2
P
14
P
2 H
2
P
14 P
3
P
3
P
15
P
3
P
3 P
15 P
4
P
4 P
16
P
4 P
4 P
16
P
5
P
5
P
17 P
5
L
5 P
17 P
6
P
6 P
18 P
6
P
6 P
18
P
7
P
7 P
19
P
7 H
7
P
19
P
8
L 8
P 20
P
8 L
8
P
20
P
9
H 9 P
21
P
9 H
9 P
21
P
10
P
10 P
22 P
10 L
10 P 22
P
11 P
11
P
23 P
-11 P
11
P 23
P
12
P
12
L
24
H
12 H
12
L
24
H
13
P
13
P
14
P
14 P
15
P
15 L
16
P
16 P
PIN
PIN
PIN PIN
PIN
PIN
PIN
NO.
3B NO. 3B NO.
3B
NO. 3B NO.
3C
4B NO. 5A
NO. 5A
1
P
17 H
33
L
49
P
1
*(3)
P
1
H
15
P
2
P
18 H
34
*
50
P
2 P
H
2 P
16 P
3 P
19 L 35
H
51 P 3 LC3) P
3 P
17
P
4 P
20 P
36 P
52 P
4
L P
4 P
18
P
5
P
21 H(2)
37 H 53 P
5 L P
5
P
19
P
6 P
22 P
38 L 54
P
6
*(3)
P
6 P 20 P
7
P
23 P
39
L 55 P
7
P
H
7 P
21
P
8 P 24 P
40
H 56 P
8 L
L
8
P
22 P
9
H 25
H
41 H 57 P
9
H(3)
H 9 P
23
P
10 H 26
L 42
H
58
P
10 L(3) P
10 P 24 P
11
L 27 P 43
H 59 P
11 H
P
11
P
25
P
12
H 28
H
44
P 60
P
12 L P
12 P
26 P
13 L 29
L 45 P
61
P
13
L
P
13 P
27 P
14 H 30 P
46
P
62 P
14 H P
14
L 28
H
1
15
H
31
P 47
P
63 H
15
H(3)
L 1
1
16 P 32
L 48 P
64 H
1
16 L(3)
H
1 |
o
o
m
r-
-n
x
do
o
m
-o
</)
O
z
NOTE:
Logic probe readings taken with
Printer
On
Line
and
in
self-test
mode
unless otherwise noted.
Switches
SW1
and
SW2
set as
shown
on
schematic.
Logic Probe
Display
L
= Low
H =
High
P
=
Probe
= Open
(No
ights
On)
(1)
High
when
Printhead
at
home
position.
(2)
Low when
Printhead
at
home
position.
(3)
Pulse during
line feed.
(4)
Logic readings
not taken.
(5)
Do
not measure.
25