Install the No. 1 and No. 2 scanner units to the specified posi-
tions, adjust the mechanical horizontal parallelism, and perform
the final adjustment while making copies.
II.
Purpose
The purpose of this adjustment is to reduce horizontal image
distortion by setting the horizontal optical axis of the copier and
the No. 1 and No. 2 scanner unit horizontal optical axis in paral-
lel with each other.
III.
Note
Before starting this adjustment, the following items must have
been completed. If not, this adjustment cannot reduce image
distortion.
*
The lens unit right angle adjustment must have been com-
pleted.
*
The No. 4/5 mirror unit right angle adjustment must have
been completed.
IV.
Cases when the adjustment is required
1) When the No. 1 and No. 2 scanner units are disassembled or
their part is replaced.
2) When the scanner unit drive section is disassembled or its
part is replaced.
3) When the copy image is distorted as shown below:
V.
Necessary tools
*
Screwdriver (+)
*
Hex wrench
*
Scale
*
Test chart for distortion adjustment (Make a chart shown
below by yourself.)
Draw a rectangle on a paper (B4 or 8 1/2" x 14") as shown
below.
Be sure to make four right angles.
VI.
Adjustment procedure
1) Remove the right upper side cabinet and the document refer-
ence plate.
2) Remove the document glass.
3) Loosen the fixing screw of the No. 1 scanner unit wire.
4) Manually turn the scanner unit drive gear to bring No. 2
scanner unit into contact with No. 2 scanner unit positioning
plate. When No.2 scanner unit makes contact with No.2
scanner unit positioning plate in the rear frame side simul-
taneously, the mechanical parallelism of No.2 scanner unit is
proper.
If one side of No.2 scanner unit makes contact with No.2
scanner unit positioning plate and the other side does not,
the parallelism is improper.
If the parallelism is improper, perform the procedure of step
5).
5)
Loosen the scanner unit drive pulley setscrew in the side where
No.2 scanner unit does not make contact with No.2 scanner unit
positioning plate.
Document
Copy A
Copy B
L=10mm
Document
reference plate
Document table glass
Right upper side cabinet
Wire fixing screw
Wire fixing screw
Scanner unit drive pulley
Set screw
7 – 9
