Sharp SF-2014 Service Manual page 82

5) Measure the lead edge void area of each copy.
Void area
mm
1 0 20 30
1/2mm
Black background edge
Paper lead edge
6) Calculate the average void area.
7) Calculate the void area adjustment value from the formula
shown below.
Current set value (99) –
= Adjustment value (Decimal point rounded)
8) Set the adjustment value obtained in procedure 7). (Deci-
mal point rounded off)
9) With the document cover open, make several copies at
100%.
10) Measure the copy lead edge void area.
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.
(Not required for the models without zoom functions.)
12) Check that the void area is within the specified range.
Void area
mm
1 0 20 30
1/2mm
Black background edge
Paper lead edge
Standard:
3
0 mm
0
If the void area is outside the specified range, change the
set value of simulations 45 and repeat procedures 9) to
12).
When the set value is changed by "1," the void area is
changed by about 0.123 mm.
When the set value is made greater, the void area be-
comes greater, and vise versa.
Copy scale image
current void area mm
0.123
Copy scale image
13) Make a copy in the SPF mode and check that the void area
is within the specified range.
Void area
mm
1 0
1/2mm
Black background edge
Paper lead edge
Standard:
3
0 mm
0
If the void area is outside the specified range, check adjust-
ment value C of simulations 50-1 or check the SPF unit
mechanism section.
(End edge void area adjustment) Cassette paper feed mode
1) Set a scale and A4 or 8 1/2" x 11" paper on the document
table as shown below:
B4 or "14 x 8½" paper
2) Execute simulations 45. (C
CB)
The set adjustment value is displayed on the COPIES SE-
LECTED display.
Press the paper feed unit select button to blink the cassette
paper feed lamp and to set the machine to the end edge
void adjustment mode in the cassette paper feed mode.
3) Set the adjustment value to "99."
Enter "99" with the numeric key, and press PRINT button.
4) With the document cover open, make several copies at
100%.
7 – 24
Copy scale image
20 30
0 0 C 45 CB 1