Sharp AJ2000 ユーザーズマニュアル

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When printed lines are not straight, or have blank spaces, follow the steps listed below.

1111

Specify the print quality setting in the printer 
driver.
Select "Print" from the "File" menu of your application, and 
then switch the menu to "Advanced" to select "Sharp 
Special", "Normal", "Best" for the "Print Quality" setting.
If you change the setting from "Draft" to any other option 
and printed lines are still poor, go to step 2.

Reference:

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Align the print head.
Select "Print" from the "File" menu of your application, click 
the "Maintenance" button, and then click the "Start" button 
of "Print alignment patterns" to align the print head.

Reference: