Sharp AL-1215 Service Manual page 73

(1) Lead edge adjustment
1) Set a scale to the center of the paper lead edge guide as shown
below, and cover it with B4 or 8 1/2" x 14" paper.
2) Execute SIM 50 - 01
3) Set the print start position (AE lamp ON) (A), the lead edge void
amount (TEXT lamp ON) (B), and the scan start position (PHOTO
lamp ON) (C) to 0, and make a copy of a scale at 100%.
4) Measure the image loss amount (R mm) of the scale image.
Set C = 10 X R (mm). (Example: Set the value of C to 30.)
When the value of C is increased by 10, the image loss is
decreased by 1mm. (Default: 50)
5) Measure the distance (H mm) between the paper lead edge and
the image print start position.
Set A = 10 X H (mm). (Example: Set the value of A to 50.)
When the value of A is increased by 10, the image lead edge is
shifted to the paper lead edge by 1mm. (Default: 50)
6) Set the lead edge void amount to B = 50 (2.5mm).
When the value of B is increased by 10, the void amount is
increased by about 1mm. For 25 or less, however, the void amount
becomes zero. (Default: 50)
(Example)
Distance between paper lead
edge and image: H = 5mm
5mm
10mm
(2) Image rear edge void amount adjustment
1) Set a scale to the rear edge section of A4 or 11" x 8 1/2" paper size
2) Execute SIM 50 - 01 to select the image rear edge void amount
3) Make a copy and measure the void amount of image rear edge.
4) If the measurement value is out of the specified range, change the
Note: The rear edge void cannot be checked with the first sheet after
(3) Center offset adjustment
1) Set the self-made test chart for the center position adjustment so
Image loss:
R = 3mm
• Test chart for the center position adjustment.
2) Execute SIM 50 - 10 to select the print center offset (cassette
AL-1551CS ADJUSTMENTS 9 - 3
as shown in the figure below, and cover it with B4 or 8 1/2" x 14"
paper.
B4 or 8 1/2" × 14" paper
adjustment mode.
The set adjustment value is displayed on the copy quantity display.
Void amount (Standard value: 2 3mm)
Scale image
set value and repeat the adjustment procedure.
The default value is 50.
entering the simulation mode, the first sheet after turning off/on
the power, or the first sheet after inserting the cassette. Use the
second or later sheet to check the rear edge void.
that its center line is aligned with the center mark of the document
guide.
Draw a line at the center of A4 or 8 1/2" x 11" paper in the paper
transport direction.
Document guide
paper feed) adjustment mode.
The set adjustment value is displayed on the copy quantity display.
A4 size rear edge
Paper rear edge
Center
Copy paper
(A4 or 8 1/2" × 11")