Laser unit adjustment is to fix parallelogram images that developed as a result of the laser operation, by means of adjusting the physical angle of the laser unit itself. This adjustment must be done after the skew-correction for the paper feed unit.

If parallelogram images are caused by the scanner after doing the laser unit adjustment, scanner unit adjustment must also be performed to correct this.

  1. Enter into the SP mode.
  2. Using SP2-109-003, output a trimming pattern to measure the parallelogram.
    • It is not necessary to do this step if output image is developed properly.

    • If the laser unit causes a parallelogram image, there is a slanted line in the main-scan direction, and there is a straight line in the sub-scan direction.

  3. Remove the laser unit (Laser Unit).
  4. Paste the adjustment sheet(s) on the reference points located on the back side of the laser unit (two points on the inside and/or one point on the front side).

    • A set of four sheets is provided as service parts. The number of sheets to be pasted depends on the condition of the image.
    • If lines slant down to the left [A], paste one or two sheets on the front side.
    • If lines slant down to the right [B], paste one or two sheets at each position on the rear side.
    • Adjustable amount: 0.5mm – 0.6mm/sheet

  5. Do step 1 and 2 again to check that there is no parallelogram image.