Epson FX-80 Technical Service Data page 37

LOGIC
(Continued)
PIN
PIN PIN
NO. 5B 6A 6B 7A
78 7C 8A 88 8C NO. 9B NO.
9B
.
1
P
L
H
H
P P
LCI) L L
1
H(2)
21
P
2
P P
L P P P H<2>
H L 2
(5)
22 P
3
*
P
H H H P
H L L 3 (5) 23
P
4 L P
H H L P L L P
4
H 24 H
5
P P
L
P
L
H P H
P
5
H 25 H
6 P P
H
P
L
L
P
L P 6 P 26 H
7 L P L H L
L L L
P
7 L 27 H
8 L P L(1)
H H
P
L L L 8
P
28 H
9 H P H(2) P
H
P
H H H 9
P 29
H
10 L L H L L H
H
H P
10
P 30 H
11
H P P H H L
L L
P
11
P
31 H
12 H
P H(2)
P H
L L H
P
12
P 32
L
13 L P
H H
L H H
L
P
13
P 33 L
14
H
P H
H H H H H H 14
P 34
L
15
P
P
H 15
P 35 L(3)
16
P
P
H
16
P 36
L
17
P
H
17
P
37 L
18
P
H
18
P
38
H
19
1
2 °
P P
19
P
39
P
H H 20 L 40 H
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
=
Pulse
*
= Open
(No
lights
On)
(1)
Probe
indicates
H
when
Printhead
is at
home
position.
(2)
Probe
indicates L
when
Printhead
is
at
home
position.
(3)
Probe
indicates
P
during
line
feed.
(4)
Logic readings
not taken.
(5)
Do Not Measure.
26