Correcting The Longitudinal Distortion - Sharp SF-2030 Service Manual

Value shown
on the label

(7) Correcting the Longitudinal Distortion

Use this procedure when replacing the mirror base driving wire.
L a
Original
1 Set an A3-size or 11" x 17" blank paper on the original table
while applying the paper end to the glass retaining plate and
aligning the paper side edge with the front frame, as shown in
the right figure.
2 Use an A3-size or 11" x 17" copy paper to take a full-size copy
with the original cover opened.
3 Measure the width of solid at front and rear ends of the copy
paper.
Test
command
48-01
1.0 60
1.1 61
1.2 62
1.3 63
1.4 64
1.5 65
1.6 66
1.7 67
1.8 68
1.9 69
2.0 70
2.1 71
2.2 72
2.3 73
2.4 74
2.5 75
2.6 76
2.7 77
2.8 78
2.9 79
3.0 80
3.1 81
3.2 82
3.3 83
3.4 84
3.5 85
3.6 86
3.7 87
(Lens value input vs. test command input)
Feeding direction
Copy
Test
Test command 26-09
command
Zoom correction
48-01
(No.4/5 mirror)
=↵
45
45
8
46
46
47
47
7
48
48
49
49
6
50
50
51
51
5
52
52
53
53
4
54
54
55
55
3
56
56
57
57
2
58
58
L b
Apply paper front end
to glass retaining plate
Glass retaining plate
7 – 12
Test command 26-08
Zoom correction (lens)
8
7
6
5
4
3
2
A3-size or 11" x 17" blank paper
Align paper side edge
with front frame