5) Loosen the copy lamp unit/No.2/3 mirror unit drive pulley
setscrew in the side where No.2/3 mirror unit does not make
contact with No.2/3 mirror unit positioning plate.
6)
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 in the same side of the loosened setscrew.
When it makes contact with No.2/3 mirror unit positioning
plate, tighten and fix the setscrew.
7)
Manually turn the copy lamp unit/No.2/3 mirror unit drive
gear to bring No.2/3 mirror unit into contact with the
positioning plate, and perform the procedure of step 4).
Repeat procedures of steps 4) to 7) until the parallelism of
No.2/3 mirror unit is properly set.
8)
With No.2/3 mirror unit positioning plate in contact with
No.2/3 mirror unit, bring the copy lamp unit into contact with
the optical unit right frame.
Under the above condition, put the scale on the copy lamp
unit projection to check parallelism and fix the copy lamp
unit to the drive wire.
Procedures 1) to 8) are for adjustment of mechanical horizontal
parallelism. The copy lamp unit and No.2/3 mirror are fixed to
the specified positions and the mechanical horizontal parallelism
of No.2/3 mirror is adjusted.
Then the optical horizontal parallelism must be adjusted in the
following procedures.
9)
Set the image distortion check chart on the document table,
and make a reduction copy (75%) on an A4 or 11" x 8 1/2"
paper with the document cover open.
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 procedure.
Loosen the setscrew of the copy lamp unit/No.2/3 mirror
unit drive pulley in the front or the rear frame.
Set screw
Scanner unit drive pulley
Copy lamp unit projection
Scale
50mm
Front side
Image distortion
check chart
LL
LR
LL and LR: Distance between the copy
image horizontal line and
theedge of the black
background.
Black background
Set screw
Scanner unit drive pulley
9 – 7
www.freeservicemanuals.info
1/11/16
Published in Heiloo, Holland.
