3-2-31
2A3/4
Maintenance
item No.
Description
U091
Method
1 Press the print key. The screen for selecting an item is displayed.
2 Select the item to be operated. The selected item is displayed in
reverse.
3 Press the print key. Operation starts.
Scanning is performed under the selected conditions and the result is
displayed.
When scanning is performed before shading, the scan value at the
machine center should be slightly different from those at the machine
front and rear. When scanning is performed after shading, there should
be no difference between respective values. Any differences between
the values at machine front and rear indicates that scanner problem
causes the fixing unevenness.
If the displayed results indicate no shading problems, the fixing
unevenness (uneven copy density) is caused by factors other than in
the scanner section (shading or CCD).
If a black line appears, the cause may assumed to be based on the
results of the scanning operation before shading: if a white line
appears, they may be assumed based on the results of the scanning
operation after shading. Note that depending on the thickness and
location of the black or white line, it may not be possible to use this
method to determine the cause. This is because the displayed values
obtained from scanning at the limit of nine points are insufficient to
provide significant information.
Figure 3-2-4
4 Press the stop/clear key. The screen for selecting an item is displayed.
Completion
Press the stop/clear key. The screen for entering a maintenance item is
displayed.
Display
SHD BEFORE
SHD AFTER
Operation
Performs scanning before shading and displays the result.
Performs scanning after shading and displays the result.
: 011 024 015
: 001 000 000
: 004 004 000
20 mm from the machine left
200 mm from the machine left
400 mm from the machine left
Machine center
100 mm from the machine
center toward machine front
100 mm from machine
center toward machine rear
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