Sharp SF-1120 - Manual (Page 82)

E. Horizontal copy magnification ratio adjustment
a. This adjustment is performed to meet the displayed magnifica-
tion ratio with the actual one.
b. This adjustment must be performed in the following cases:
• When the main PWB is replaced.
• When the EEPROM in the main PWB is replaced.
• When the mirror motor is replaced.
• When self diag. U2 occurs.
The scanning speed of the mirror base is changed to adjust the
horizontal (paper transport direction) copy magnification ratio.
(1)
Put a scale on the original table as shown in the figure below,
and execute simulation 48-02. The machine starts warming up
and the ready lamp lights up. At the same time, the previously
set value ( 1
∼ 99) is displayed. Under this state, make a nor-
mal copy and calculate the copy magnification ratio.
(2) Replace the displayed value with the copy magnification ratio
correction rate obtained in (1).
(Input value) = (Previously set value) / (Copy magnification
ratio correction rate [%])
×
10
(Example) When the previously set value is 25, the input
values of examples 1 and 2 are as follows:
• Example 1: 35 = 25 + (1 × 10)
• Example 2: 15 = 25 + (–1 × 10)
Enter the input value and press the print switch. The value
is stored and the ready lamp lights up.
(3) Cancel simulation 48-02.
Note: Input correction can be made in the range of 1 – 99
(simulation set range).
10 20 30 40 50 60 70 80 90 50 100 110 120130 140
Scale
Space
Blank paper
10 20 90 100 110
10 20 90 100 110
10 20 90 100 110
Eg1:
Copy A, of
which length
is shorter
than original
Scale
(Original)
Eg2:
Copy B, of
which length
is longer
than original
7 – 8