II.
Purpose
The purpose of this adjustment is to fit the displayed copy mag-
nification ratio with the actual copy magnification ratio.
III.
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
*
Vertical copy magnification adjustment
IV.
Cases when the adjustment is required
1) When the lens and the mirror unit are disassembled or the
part is replaced.
2) When the scanner 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 copy image distortion adjustment is performed.
7) When the center position of copy image is adjusted.
8) When the focus is adjusted.
V.
Necessary tools
*
Screwdriver (+)
*
Scale
VI.
Adjustment procedure
1) Set the scale on the document table as shown below. (Use a
long scale for precise adjustment.)
2) Set the copy magnification ratio to 100%.
3) Make a copy on A3 or 11" x 17" paper.
4) Measure the length of the copied scale image.
5) Calculate the horizontal copy magnification ratio.
Horizontal copy magnification ratio =
Copy image size
Original size
x 100 (%)
6) Check that the actual copy magnification ratio is within the
specified range (100
±
0.8%).
If it is out of the specified range, perform the following proce-
dures.
7) Execute simulations 48-2. (C
→
0
→
0
→
C
→
48
→
CB
→
2
→
CB)
The set horizontal copy magnification ratio will be displayed
in the COPIES SELECTED display.
8) Enter a new horizontal copy magnification ratio with the
numeric key and press PRINT button. The above procedure
changes the lens home position and the horizontal copy
magnification ratio.
When the copy magnification ratio is set to a larger value, the
actual copy magnification ratio becomes larger.
When the copy magnification ratio is set to a smaller value,
the actual copy magnification ratio becomes smaller.
Repeat procedures 1) to 8) until the horizontal copy magnifica-
tion ratio in the normal (100%) copy mode is within the specified
range.
VII.
Troubles caused by improper adjustment
100
110
120
130
150
140
mm
1/2mm
JAPAN
HARDDENCD
STAINLESS
Shizuoka
100
110
120
130
150
140
mm
1/2mm
JAPAN
HARDDENCD
STAINLESS
Shizuoka
110
1 0
2 0
1 0
2 0
Original scale
Paper feed
direction
Reference
Comparison point
Copy
Scale
7 – 17
