MX-M850 (serv.man36). Section 6 Adjustments - Sharp Copying Equipment Service Manual (repair manual). Page 15

MX-M1100  ADJUSTMENTS  6 – 15

2)

Set the test chart made in the procedure 1) on the document
table, and make a copy on A3 (11” 

✕ 17”) paper. 

3)

Check for any distortion in the main scanning direction.
If the four angles of the copy image (rectangle) is right angles,
there is no distortion. (Work completed)

If there is any distortion in the main scanning direction, perform the
following procedures.
(Left side distortion adjustment)
1)

Turn the horizontal level adjustment screw of the CCD unit. 
(There are two adjustment screws in the front (A) and at the
back (B). Be sure to use only the screw in the front (A))
(When adjusting with the screw at the back (B), use a great
care for generation of shades of images.) 

If the left side inclines to the left: 
Turn the CCD unit horizontal adjustment screw (A) clockwise. 
(When adjusting the adjustment screw (B) on the front frame
side, turn the screw counterclockwise. When adjusting the
adjustment screw on the rear frame side, turn the screw coun-
terclockwise.)

If the left side inclines to the right: 
Turn the CCD unit horizontal adjustment screw (A)  clockwise. 
(When adjusting the adjustment screw (B) on the front frame
side, turn the screw clockwise. When adjusting the adjustment
screw on the rear frame side, turn the screw clockwise.)

2)

Make a copy of the distortion check test chart, and check for
any distortion on the left side.
Repeat the above procedures until the distortion on the left
side is minimized.
Variation 0.7/260mm, 0.5 revolution

(Right side distortion adjustment)
1)

Change the balance of the scanner rail height on the rear
frame side.

Remove the rear upper cabinet. Loosen the scanner rail fixing
screw (red screw) on the left side when viewed from the front
to change the height balance of the left and right sides of the
scanner rail. There are two fixing screws (red screws) of the
scanner rail. 
(NOTE) 
There is a scanner rail also on the front frame side, and it
height balance can be adjusted. However, it is not advisable to
adjust it because many parts must be removed for the adjust-
ment. 
When the right side inclines to the right:
Lift the level of the left side of the rear frame scanner rail. 
(When viewed from the rear frame side)

A

B