Oki MC770 series, Maintenance Manual

Page: 75 / 487

45584901TH Rev.1
4-12 /
Oki Data CONFIDENTIAL
Twin color print
Color specified for
twin color print
Item to be adjusted
Remarks
Black Yellow Magenta Cyan
Black 8023-0 - - - The larger the value is, the darker
the color to be adjusted becomes.
Acceptable values: 0 to 255
(Default: 128)
8023-1 - - -
8023-2 - - -
Cyan - 8024-0 8025-0 8026-0
- 8024-1 8025-1 8026-1
- 8024-2 8025-2 8026-2
Magenta - 8027-0 8028-0 8029-0
- 8027-1 8028-1 8029-1
- 8027-2 8028-2 8029-2
Yellow - 8030-0 8031-0 8032-0
- 8030-1 8031-1 8032-1
- 8030-2 8031-2 8032-2
Red - 8033-0 8034-0 8035-0
- 8033-1 8034-1 8035-1
- 8033-2 8034-2 8035-2
Green - 8036-0 8037-0 8038-0
- 8036-1 8037-1 8038-1
- 8036-2 8037-2 8038-2
Blue - 8039-0 8040-0 8041-0
- 8039-1 8040-1 8041-1
- 8039-2 8040-2 8041-2
Notes:
• Be sure that this adjustment be made after performing

P. 4-7 “4.3.1 Automatic gamma
adjustment”.
• Changing the adjustment setting influences the adjacent density area slightly.
E.g.: When the value of the medium density is larger, the adjacent areas in the low density
and high density range will become slightly darker.
<Procedure>
The procedure is the same as that of

P. 4-9 “4.3.2 Gamma balance adjustment (Black
Mode)”.
<Range of the density area (low density, medium density, high density)>
The color from the 1st to the 14th stage (low density), from the 15th to the 22th stage (medium
density), from the 23th to the 26th stage (high density) in “Patch chart for gamma adjustment ([71]
[FAX])” output in

P. 4-7 “4.3.1 Automatic gamma adjustment” can be used as a guide for the
range of the density area influenced by the adjustment with the printer driver and the change of
the adjustment value (low density, medium density, and high density (Refer to

P. 4-10 “Fig. 4-2 “).