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LOGIC
CHART
PIN
IC
PIN
IC
PIN
IC
PIN
IC
IC
IC
IC
IC
IC
NO.
4A
NO.
6A
NO.
6A
NO.
7A
8A
IB
2B
3B
5B
1
H
1
H
17
P
1
L
H
P(1)
P(2)
P(2)
L
2
P
2
P
18
P
2
P
P
P(2)
P
P
P(1)
3
H
3
P
19
P
3
P
H
P(1)
P(4)
H
P
4
H
4
P
20
L
4
P
H
P(2)
P
H
P
5
P
5
P
21
P
5
P
P
P(1)
P(4)
H
P(1)
6
P
6
P
22
P
6
P
P
P(2)
P
H
P(1
7
H
7
P
23
P
7
P
H
L
L
L
P
8
H
8
P
24
P
8
P
H
P(2)
P(2)
P
P
9
P
9
P
25
P
9
P
P
P(1)
P(1)
P(4)
P(1)
10
L
10
P
26
P
10
L
L
P(2)
P(2)
P
L
11
L
11
P
27
H
11
P
H
P(1)
P(1)
P(4) P
12
P
12
P
28
H
12
P
P
P(2)
P
P
P(1)
13
H
13
P
13
P
H
P(1)
P(1)
P(1) P
14
H
14
L
14
P
L
H
H
H
P(1)
15
P
15
P
15
P
P
P(1)
16
P
16
P
16
P
P
P(1)
17
H
17
P
L
P
18
H
18
P
L
P
19
P
19
P
P
P(1)
20
H
20
H
H
H
PIN
IC
PIN
IC
PIN
IC
PIN
IC
PIN
IC
IC
IC
NO.
7B
NO.
7B
NO.
7B
NO.
7B
NO.
9B
9C
IOC
1
L(1)
21
P(2)
41
H
61
P
1
L
P(1)
(5)
2
H
22
P(2)
42
H
62
P
2
L
H(2)
3
H
23
P(1)
43
H
63
H
3
H
L
4
L
24
L
44
P
64
H
4
H
H
5
H
25
H
45
P(1)
5
L
L(1)
6
H
26
P
46
L
6
L
H(2)
7
P(2)
27
P
47
P(1)
7
L
L
8
P(1)
28
H
48
P
8
L
L
9
P(2)
29
P
49
P(1)
9
H
H
10
P(1)
30
P
50
P
10
L
H
11
P(4)
31
P
51
P
11
L
L
12
P(4)
32
L
52
P
12
L
L
13
P(4)
33
L
53
P
13
H
H
14
P(4)
34
H
54
P
14
H
H
15
P(4)
35
*
55
P
15
16
H
36
H
56
P
16
17
P(1)
37
H
57
P
17
18
H
38
H
58
P
18
19
H(2)
39
*
59
P
19
20
H
40
H
60
P
20
o
o
CO
o m
x z
00
o
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
lights
On)
(1)
Probe
indicates
H when
printhead
is
at
home
position.
(2)
Probe
indicates L
when
printhead
is
at
home
position.
(3)
No
indication
when
printhead
is
at
home
position.
(4)
Probe
indicates
P
during
line
feed.
(5)
No
logic
reading taken.
13
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