Printer Gamma Correction; Copy Mode - Gestetner B147 Service Manual

3.2.5 PRINTER GAMMA CORRECTION

NOTE: Normally, the ACC is enough to adjust the color balance to achieve the
optimum print output. The printer gamma correction is only required for
fine-tuning to meet user requirements.
The printer gamma curve created during ACC can be modified using SP modes.
The gamma data for highlight, middle, shadow areas, and IDmax can be adjusted.
The adjustable range is from 0 to 15 (16 steps).

Copy Mode

KCMY Color Balance Adjustment
The adjustment uses only "Offset" values.
NOTE: 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 (SP4-918-009):
• Copy Photo mode
• Copy Letter mode
• Copy Letter (Single Color) mode
• Copy Photo (Single Color) mode
SM
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.
3-7
IMAGE ADJUSTMENT
B146R967.WMF
B147/B149/B190