39Test printThis self-diagnosis is practiced to print test patterns built in PU. Other test patterns are stored in the controller.This print should not be used to check the print quality. To diagnose abnormal images, follow Section 7.1. Activate the self-diagnostic mode (Level 1), press and hold down the MENU+ or MENU key, until "TESTPRINT" appears in the upper line of the display section, and then, press the ENTER key.(The MENU+ keyincrements a test item, and the MENU- key decrements a test item.)2. The lower line of the display section shows the set items that are applicable to the test print only. Press andhold down the MENU+ or MENU- key, until the corresponding item appears, and press the ENTER key. (TheMENU+ key increments a test item, while the MENU- key decrements a test item.) (If the set values of the itemsare not necessary (Default settings), go on to Item 5.)3. When the ENTER key is depressed after holding down the MENU+ or MENU- key in Item 2 above, a set item isdisplayed in the upper line of the display section, and a set value, in the lower line. Pressing the MENU+ keyincrements the set value, and pressing the MENU- key decrements it (the set value finally displayed will beapplied). Pressing the BACK key defines the value and restores Item 2. Repeat Item 3, as needed.*Shaded areas are default settingsNotes!PAGE setup - After shifting the digit of the set value with the MENU+ key or MENU- key, press the ONLINE key.The set value will be incremented. Pressing the CANCEL key decrements it.