Printer Gamma Correction - Ricoh V-C3 D081 Field Service Manual

4. Replacement and Adjustments

Printer Gamma Correction

ACC adjustment done at installation is usually sufficient to adjust the color balance for optimum
performance.
• Printer gamma correction is required for fine adjustment to meet a customer requirement.
• The printer gamma curve created during ACC can be modified with SP modes.
• The gamma data for highlight, middle, shadow areas, and IDmax can be adjusted. The adjustable
range is from 0 to 30 (31 steps).
Copy Mode
4
KCMY Color Balance Adjustment
The adjustment uses only "Offset" values.
• Never change "Option" values (default value is 0).
Highlight (Low ID)
Middle (Middle ID)
Shadow (High ID)
ID max
Offset
There are four adjustable modes. You can access these with SP4918 (Man Gamma Adj:
• Copy: Photo (Photo Mode)
• Copy: Letter (Text Mode Full Color)
• Copy: Letter (SC) (Text Single Color Mode)
• Copy: Photo (SC) (Photo Mode Single Color)
514
Levels 2 through 5 in the C4 chart 10-level scale
Levels 3 through 7 in the C4 chart 10-level scale
Levels 6 through 9 in the C4 chart 10-level scale
Level 10 in the C4 chart 10-level scale (affects the entire image density.)
The higher the number in the range associated with the low ID, middle ID, high
ID, and ID max, the greater the density.