How To Maintain Consistent Color During Continuous Printing - Konica Minolta bizhub PRO C6501 Troubleshooting Manual

11 How to maintain consistent color during continuous
printing
[Symptom]
Inconsistent color
[Solution]
C6500 series have 3 correction items to adjust the color. Aim the stable color optimum for the
target depending on the job size and machine usage by combining correction items and
interval.
<Correction items>
Color correction performed between jobs
Automatic gamma adjustment
►
Adjustment cycle : 1000 prints
Adjustment duration : 210 to 240 seconds
CAUTION: Even the adjustment cycle 1000 prints comes, the adjustment is performed
only after 1minute interval between jobs.
Color correction that is done during a job （It is performed only if stability is selected in
Utility menu => [03 Machine Admin. Setting] => [01 System setting] => [05 Expert adjustment]
=> [07 Quality adjustment] => [04 Image quality stability]]
Maximum density correction (D-Max)
►
Duration: approx 3 seconds (Performing only during printing the job)
Gamma correction
►
Duration : approx. 27 seconds (Performing only during printing the job.)
* Correction performing interval is roughly the following prints.
Max density
correction
200 prints
Gamma
correction
N×15
CAUTION: For the gamma correction, if total prints of a job does not reach to the set interval,
the counter for the correction is cleared. (With default setting). If counter clear is
not desirable, change the DipSW 24-0 from 1 (clear at the beginning of the job) to
0 (no clear at the beginning of the job). However, please note that job output
timing and correction timing sometimes overlaps and nothing is output for 30
seconds occasionally.
Table of contents
-2 -1
100 prints
-2 -1
N×10
N: Number of prints set for the max density correction.
Frequency
Normal
50 prints 30 prints
Frequency
Normal
N×8 N×5
15
+1 +2
10 prints
+1 +2
N×3