Service manual

8) Enter the measure values in procedure 7) into the formula
below to calculate adjustment value A and adjustment
value B.
A = 8.2423 x (L1 – L2)
B = 16.0568 x L2 – 7.9661 x L1
9) Set the adjustment values obtained in procedure 8).
10) Execute simulations 50-1 to make several copies at each of
129% and 64%.
11) Measure the distance from the paper lead edge to the copy
image lead edge of each copied papers (129% and 64%),
and calculate the average value.
12) Check that the difference between the distance from the
copy paper lead edge to the copy image lead edge of
129% copy and that of 64% copy is in the range of 0 ± 1.0
mm.
If the difference is out of the above range, change adjust-
ment value A and repeat procedures 10) and 12) until the
difference is within the above range.
If adjustment value A is improper, the copy image lead
edge position fluctuates in proportion to the copy mag-
nification ratio.
13) Make a 100% copy, and check that the copy image lead
edge is in the range of 0 ±1.5 mm from the paper lead edge
position reference.
If it is out of the above range, change adjustment value B
and repeat procedure 13) until it is within the above range.
L2
10 20 30 40
50
60 70
Scale image lead edge
Reduction copy (x 0.64)
10 20 30
mm
1/2mm
LA
Scale image lead edge
Enlargement copy (x 1.54)
LA-LB
=±1.0mm
LB
10 20 30 40
50
60 70
Scale image lead edge
Reduction copy (x 0.64)
10 20 30
0±1.0mm
mm
1/2mm
Copy scale image
Paper lead edge
7 – 20