AL-1000, AL-1010 (serv.man11). AL1000 Adjustments - Sharp Copying Equipment Service Manual (repair manual). Page 7

10) Check the horizontal image distortion.

If LL = LR, there is no horizontal distortion

11) If LL is not equal to LR, perform the following proce-

dure.
Loosen the setscrew of the copy lamp unit/No.2/3 mirror
unit drive pulley in the front or the rear frame. 

12) Without moving the copy lamp unit/No.2/3 mirror unit

drive pulley shaft, manually turn the copy lamp
unit/No.2/3 mirror unit drive pulley whose setscrew was
loosened, and adjust the parallelism of copy lamp
unit/No.2/3 mirror unit. 

13) Tighten the set screw of the copy lamp unit/No.2/3 mir-

ror unit drive pulley. 

14) Check the image distortion in the same manner as step

10).
Repeat procedures 11) to 14) until horizontal image dis-
tortion is eliminated.

I. Summary

In this adjustment, the left and right balance is adjusted by
changing the left and right balance of the No. 2 scanner unit
frame on the front frame side.

II. Note

●

Horizontal image distortion adjustment

III. Cases when the adjustment is required

1) When the copy lamp unit/No.2/3 mirror unit drive section

is disassembled or its part is replaced. 

2) When the copy image is distorted as follows:

IV. Necessary tools

●

Screwdriver (+)

●

Screwdriver (–)

●

Scale

●

Test chart for distortion adjustment (Make by yourself.)
Draw a rectangle on A4 or 8 1/2

″

 

×

 11

″

 paper as shown

below:
Be sure to make four right angles. 

V. Adjustment procedure

1) Set the test chart for image distortion adjustment on the

document glass, and make a normal copy on a paper of
A4 or 8 1/2

″

 

×

 11

″

.

2) Check image distortion in the right and the left sides.

If the both vertical lines are in parallel with each other,
the right-left distortion balance is proper. (However, there
may be some distortion.)

2)

If all the four angles are right angles, there in no distor-
tion and the following procedures are not required. 

LL

LR

LL and LR: Distance between the copy
                   image horizontal line and 
                   the edge of the black 
                   background.

Black background

Set screw

Scanner unit drive pulley

Document

Copy C

Copy D

L

L

L

L

L = 10mm

Greater distortion

Smaller distortion

AL-1000/1010

9-3