Ricoh B132 - Adjustment Reference for Gamma Correction

IMAGE ADJUSTMENTS
SM 3-187 B132/B200
Replacement &
Adjustment
Adjustment Reference For Gamma Correction
The following tables show the adjustment reference for gamma correction. The
tables show the level of the color scale on the C4 test chart and on the tone control
test sheet printed in the printer SP mode. For example, for K at text mode, grade
12 on the tone control test sheet should be the same as grade 7 on the C4 chart.
Normally, it is not necessary to adjust the gamma data as shown in the table since
ACC adjusts the gamma curve automatically. The fine-tuning of color balance by
gamma data adjustment is necessary only when the results of ACC and Color
Calibration do not meet customer requirements.
C4 test chart 1 2 3 4 5 6 7 8 9 10
600 x 600 - 1 3 5 6 9 10 11 16 -
1800 x 600 - 1 3 5 6 8 10 11 16 -
Photo
1200 x 1200 - 1 3 4 6 8 10 12 15 16
600 x 600 - 1 3 5 6 9 10 11 16 -
1800 x 600 - 1 3 5 6 9 10 12 16 -
K
Test
sheet
Text
1200 x 1200 - 1 3 5 6 9 11 12 15 16
C4 test chart 1 2 3 4 5 6 7 8 9 10
600 x 600 - 1 3 5 6 9 10 12 13 14
1800 x 600 - 1 3 5 6 8 10 11 12 13
Photo
1200 x 1200 - 1 3 4 5 8 10 11 12 13
600 x 600 - 1 3 4 5 8 10 11 12 13
1800 x 600 - 1 3 5 6 9 10 11 12 14
C
Test
sheet
Text
1200 x 1200 - 1 3 4 5 9 10 11 12 13
C4 test chart 1 2 3 4 5 6 7 8 9 10
600 x 600 - 1 4 6 8 11 12 14 16 -
1800 x 600 - 1 4 6 8 11 12 15 16 -
Photo
1200 x 1200 - 1 4 6 7 10 12 14 16 -
600 x 600 - 1 4 6 7 10 12 14 16 -
1800 x 600 - 1 4 6 8 11 13 14 16 -
M
Test
sheet
Text
1200 x 1200 - 1 4 6 7 10 12 13 16 -
C4 test chart 1 2 3 4 5 6 7 8 9 10
600 x 600 1 3 4 9 11 12 14 15 16 -
1800 x 600 1 3 5 8 10 11 14 15 16 -
Photo
1200 x 1200 1 3 5 8 10 11 14 15 16 -
600 x 600 1 2 5 8 10 11 14
14/
15
15 16
1800 x 600 1 3 6 9 10 12 14 15 16 -
Y
Test
sheet
Text
1200 x 1200 1 2 4 7 9 10 13 15 16 -