Change Of Color - Konica Minolta bizhub PRO C6501 Troubleshooting Manual

17 Change of color

[Symptom]
When ambient environment or media changes, color changes.
[Probable cause]
Image forming process features changes due to the change of environment (temperature and
humidity) and media and effect of previous job coverage.
[Solution]
Perform Auto gamma Adjustment from utility menu or service mode then calibration.
・ If color change at highlight part is remarkable, perform Auto gamma adjustment, perform
printer gamma offset adjustment, then controller calibration in order.
Auto gamma adjustment
・ Service mode => [02 Process Adjustment] => [02 Drum Peculiarity Adj.] => [03 Auto
gamma adjustment]
・ Utility/Counter => [03 Machine Admin. Setting] => [01 System Setting] => [05 Expert
Adjustment] => [08 Execute Adjust Operation] => [Automatic Gamma Adj.]
Printer gamma offset adjustment
・Utility/Counter => [03 Machine Admin. Setting] => [01 System Setting] =>[ 05 Expert
Adjustment] => [07 Quality Adjustment] => [ 01 Printer Gamma Offset Adj.]
Calibration (Refer to
・ Follow to procedure specified for each controller.
perform calibration using the actual paper with the specific setting of paper type and
paper weight.
CAUTION: Please note that Printer Gamma Offset Adj. result affects both copy and printer
gradations.
Table of contents
34. Calibrtaion Procedure)
To perform accurate calibration,
22