Printer Gamma Correction; Copy Mode - Ricoh D143 Field Service Manual

• After you transport or move the machine (you should do the forced line position adjustment if
you install the machine at the user location.) if the machine is pre-installed at the workshop
and moved to the user location,
• When you open the drum positioning plate
• When you remove or replace the motors, clutches, and/or gears related to the drum/
development/transfer sections
• When you remove or replace the image transfer belt, image transfer belt unit or laser optical
housing unit

Printer Gamma Correction

• The ACC is usually sufficient to adjust the color balance to get the best print output. You only need
the printer gamma correction to fine-tune to meet user requirements.
Use SP modes if you want to modify the printer gamma curve created with ACC. You can adjust the
gamma data for the following:
• Highlight
• Middle
• Shadow areas
• IDmax.
The adjustable range is from 0 to 30 (31 steps).

Copy Mode

- 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
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.
Image Adjustment
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