Sharp MX-M200D Service Manual page 27

1) Making of a test sheet
Make test sheet by drawing parallel lines at 10mm from the both
ends of A3 (11" x 17") white paper as shown below. (These lines
must be correctly parallel to each other.)
Parallel line
10mm
10mm
2) Make a normal (100%) copy of the test sheet on A3 (11" x 17")
paper. (Fit the paper edge with the glass holding plate edge.)
3) Measure the distances (La, Lb, Lc, Ld) at the four corners as shown
below.
La
Paper exit
direction
Lb
When La = Lb and Lc = Ld, no need to perform the procedures 4) and 5).
4) Move the mirror base F rail position up and down (in the arrow
direction) to adjust.
Note:Do not adjust the rail on the rear side.
If the rail on the rear side is adjusted, an error may occur.
Only the rail on the front side can be adjusted.
Parallel line
10mm
10mm
White paper
Lc
Ld
MX-M200D ADJUSTMENT 6-7
When La > Lb
Shift the mirror base B rail upward by the half of the
difference of La - Lb.
When La < Lb
Shift the mirror base B rail downward by the half of the
difference of Lb - La.
Example: When La = 12mm and Lb = 9mm, shift the mirror
base B rail upward by 1.5mm.
When Lc > Ld
Shift the mirror base B rail downward by the half of the
difference of Lc - Ld.
When Lc < Ld
Shift the mirror base B rail downward by the half of the
difference of Ld - Lc.
When moving the mirror base rail, hold the mirror base rail
with your hand.
<Adjustment specification>
La = Lb, Lc = Ld
5) After completion of adjustment, manually turn the mirror base drive
pulley, scan the mirror base A and mirror base B fully, and check that
the mirror bases are not in contact with each other.
* If the mirror base rail is adjusted to extreme, the mirror base may
contact the frame or original glass. Be careful to avoid this.
(5) Main scanning direction (FR direction) magnification
ratio adjustment (SIM 48-1)
Note:Before performing this adjustment, be sure the CCD unit is within
specification.
1) Put a scale on the original table as shown below.
2) Execute SIM 48-1.
3) After warm-up, shading is performed and the current set value of the
main scanning direction magnification ratio is displayed on the
display section in 2 digits.
4) Select the mode and press the [START] key again.
5) Manual correction mode (TEXT indicator ON)
Enter the set value and press the [START] key.
The set value is stored and a copy is made.