7) Loosen the fixing screw of No.4/5 mirror unit drive lever to
change the position of No.4/5 mirror unit drive lever or No.4/5
mirror unit.
In this case, do not shake No.4/5 mirror unit, just change its
position.
*
In zooming, the adjustment is made by changing the relative
positions of the gear and the cam.
8) Make a copy and check that the resolutions are in the
specified range.
If any resolution is out of the specified range, repeat proce-
dures 1) to 8).
(5) Copy magnification ratio adjustment
The copy magnification ratio adjustment must be performed in the
vertical direction and in the horizontal direction.
Firstly perform the vertical copy magnification ratio adjustment, then
perform the horizontal copy magnification ratio adjustment.
a. Vertical copy magnification ratio adjustment
I.
Summary
The lens home position is changed voluntarily with simulations
48-1 to adjust the vertical copy magnification ratio.
The vertical copy magnification ratio adjusted in this procedure
is used for the horizontal copy magnification ratio adjustment.
II.
Note
Before performing this adjustment, the following adjustments
must have been completed. If not, this adjustment cannot be
performed properly.
*
Image distortion adjustment
*
Focus adjustment
The vertical magnification ratio adjustment must be performed in
advance to the horizontal copy magnification ratio adjustment.
Never reverse the sequence. (The horizontal copy magnification
ratio is based on the vertical copy magnification ratio.)
III.
Cases when the adjustment is required
1) When the lens and the mirror unit are disassembled or the
part is replaced.
2) When the copy lamp unit/No.2/3 mirror unit drive section is
disassembled or the part is replaced.
3) When the main PWB is replaced.
4) When the RAM in the main PWB is replaced.
5) When "U2" trouble occurs.
6) When the position of the lens home position sensor is
changed.
7) When the lens home position sensor is replaced.
8) When the copy image distortion adjustment is performed.
9) When the center position of copy image is adjusted.
10) When the focus is adjusted.
VI.
Necessary tools
*
Screwdriver (+)
*
Scale
V.
Adjustment procedure
1) Set the scale vertically on the document table. (Use a long
scale for precise adjustment.)
2) Set the copy magnification ratio to 100%.
3) Make a copy on A4 or 8
1
⁄
2
" x 11" paper.
4) Measure the length of the copied scale image.
9 – 11
www.freeservicemanuals.info
1/11/16
Published in Heiloo, Holland.
