Oki MC770 series, Maintenance Manual

Page: 78 / 487

45584901TH Rev.1
4-15 /
Oki Data CONFIDENTIAL
4.3.9 “PureBlack/PureGray” threshold adjustment (Twin color mode)
<Adjustment Mode (05)>
Code Item to be adjusted Remarks
8213 Text The larger the value is, the wider the color range to be
printed only with the black toner becomes. The smaller
the value is, the narrower this color range becomes.
Acceptable values: 1 to 255
8214 Graphics
8215 Image
<Procedure>
The procedure is the same as that of

P. 4-13 “4.3.4 Adjustment of faint text”.
4.3.10 “PureBlack/PureGray” threshold adjustment (PS)
<Adjustment Mode (05)>
Original mode
Item to be
adjusted
Remarks
General
Photo-
graphic
Present-
ation
Line art
Color
profile
8252-0 8252-1 8252-2 8252-3 8252-4 Text The larger the value is, the wider the
color range to be printed only with the
black toner becomes. The smaller the
value is, the narrower this color range
becomes.
Acceptable values: 1 to 255
8253-0 8253-1 8253-2 8253-3 8253-4 Graphics
8254-0 8254-1 8254-2 8254-3 8254-4 Image
<Procedure>
The procedure is the same as that of

P. 4-9 “4.3.2 Gamma balance adjustment (Black Mode)”.
4.3.11 “PureBlack/PureGray” threshold adjustment (XPS)
<Adjustment Mode (05)>
Original mode
Item to be
adjusted
Remarks
General
Photo-
graphic
Present-
ation
Line art
Color
profile
8249-0 8249-1 8249-2 8249-3 8249-4 Text The larger the value is, the wider the
color range to be printed only with the
black toner becomes. The smaller the
value is, the narrower this color range
becomes.
Acceptable values: 1 to 255
8250-0 8250-1 8250-2 8250-3 8250-4 Graphics
8251-0 8251-1 8251-2 8251-3 8251-4 Image
<Procedure>
The procedure is the same as that of

P. 4-9 “4.3.2 Gamma balance adjustment (Black Mode)”.