SHARP AR5012
Service Manual

(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) 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 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

A4 size rear edge

2) Execute SIM 50 - 01 to select the image rear edge void amount adjustment mode. The set adjustment value is displayed on the copy quantity display. 3) Make a copy and measure the void amount of image rear edge. 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) 4) If the measurement value is out of the specified range, change the set value and repeat the adjustment procedure. The default value is 50. Note: The rear edge void cannot be checked with the first sheet after 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.

Void amount (Standard value: 2 3mm)

Scale image Paper rear edge

(Example) Distance between paper lead edge and image: H = 5mm Image loss: R = 3mm

(3) Center offset adjustment
1) Set the self-made test chart for the center position adjustment so that its center line is aligned with the center mark of the document guide. � Test chart for the center position adjustment. Draw a line at the center of A4 or 8 1/2" x 11" paper in the paper transport direction.
Document guide

5mm

10mm

Center Copy paper (A4 or 8 1/2� � 11�)

2) Execute SIM 50 - 10 to select the print center offset (cassette paper feed) adjustment mode. The set adjustment value is displayed on the copy quantity display.

AR-5012 ADJUSTMENTS 9 - 3