Imaging Process Adjustment; X-Rite Calibration (Gradation Adjust); D Max Density - Konica Minolta bizhub C250P Service Manual

Field Service Ver. 2.0 Mar. 2006

17.7 Imaging Process Adjustment

17.7.1

X-Rite Calibration (Gradation Adjust)

Functions • To make an automatic adjustment of gradation based on the test pattern produced
and the readings taken by the Scanner
Use • Color reproduction performance becomes poor.
• The IU has been replaced.
• The Image Transfer Belt Unit has been replaced.
• Gradation Mode
• Resolution Mode
Setting/
See P.51
Procedure
17.7.2

D Max Density

Functions • To adjust gradation, color, and image density to target reproduction levels by varying
the maximum amount of toner sticking to paper through auxiliary manual fine-adjust-
ment of gamma of each color after Gradation Adjust.
Use • An image quality problem is not corrected even after Gradation Adjust has been run.
Adjustment
"0" (-10 to +10)
Range
Adjustment To increase the maximum amount of toner sticking, increase the setting value.
Instructions To decrease the maximum amount of toner sticking, decrease the setting value.
Setting/ 1. Call the Service Mode to the screen.
2. Click these keys in this order: [Imaging Process Adjustment] → [D Max Density].
Procedure
3. Select the color to be adjusted.
4. Enter the new setting from the 10-key Pad.
5. Click [END] to return to the [Process] menu screen.
6. Click [Stabilizer].
7. Click [Stabilizer Mode].
8. Press the Start key to validate the adjustment value.
9. Check the print image for any image problem.
NOTE
• If the setting value has been changed, be sure to run an image stabilization
sequence to make valid the new value.
: It gives the highest priority to gradation performance of
the image as it adjusts.
: It gives the highest priority to reproduction performance
of letters and lines as it adjusts.
17. Jig Soft
225