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45584901TH Rev.1 4-7 /Oki Data CONFIDENTIAL4.3 Image Quality Adjustment (Printing Function)4.3.1 Automatic gamma adjustmentWhen the reproduction of gradation is not appropriate, the gradation reproducibility of all colorsY, M, C and K can be corrected by performing this automatic gamma adjustment. In casethe gradation reproduction of the image checked is not satisfactory, make this adjustment asdescribed below at parts replacement.When unpacking or any of the following parts has been replaced, be sure to make this adjustment:• Drum unit• Transfer belt unit• SRAM board (CU board)• PU board• HDDNotes:Be sure to perform this adjustment after performing P. 4-2 “4.1.2 Performing densitycorrection”.(1) While pressing [0] and [5] simultaneously, turn the power ON. → Adjustment Mode(2) Select the A4/LT Tray. Key in the pattern number and press the [FAX] button to output a “Patchchart for adjustment”.600dpiPattern No. Paper type Remarks70 Plain paper Used when the code 8004-0 is performed74 Thick paper 5 Used when the code 8004-2 is performed76 Thick paper 1 Used when the code 8004-3 is performed78 Thick paper 2 Used when the code 8004-4 is performed80 Thick paper 3 Used when the code 8004-5 is performed82 Thick paper 4 Used when the code 8004-6 is performed86 Special paper 4 to 6 Used when the code 8004-8 is performed88 User type Used when the code 8004-9 is performed90 Plain (Thin) Used when the code 8004-10 is performedNotes:However, this is applied to all paper types when 05-8008 is performed.1200dpiPattern No. Paper type Remarks230 Plain paper Used when the code 8005-0 is performed234 Thick paper 5 Used when the code 8005-2 is performed236 Thick paper 1 Used when the code 8005-3 is performed238 Thick paper 2 Used when the code 8005-4 is performed240 Thick paper 3 Used when the code 8005-5 is performed242 Thick paper 4 Used when the code 8005-6 is performed246 Special paper 4 to 6 Used when the code 8005-8 is performed248 User type Used when the code 8005-9 is performed250 Plain (Thin) Used when the code 8005-10 is performedNotes:However, this is applied to all paper types when 05-8009 is performed.
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