Konica Minolta bizhub C250 Service Manual page 258

Field Service Ver. 3.0 Aug. 2006
(7) Gradation Adjustment
• It will not be displayed when the following setting is set to "ON".
[Service Mode] → [Imaging Process Adjustment] → [Dev. Bias Choice]
• It will not be displayed when the following setting shows that Management Device 1 is
2
mounted during the device power is OFF or no authentication is set.
[Service Mode] → [Billing Setting] → [Management Function Choice]
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.
• Printer (Gradation)
• Printer (Resolution)
• Copy
Adjustment NOTE
1
• Before conducting the Gradation Adjustment, make sure to turn Main power
Procedure
OFF to stabilize the image. Wait for more than ten seconds and turn power
back ON.
1. Call the Administrator Setting to the screen.
2. Touch [System Setting] → [Expert Adjustment] → [Gradation Adjustment].
3. Select the appropriate mode for the Gradation Adjustment.
4. Press the Start key to let the machine produce a test pattern.
5. Place the test pattern produced on the Original Glass.
6. Place ten blank sheets of A3 paper on the test pattern and lower the Original Cover.
7. Press the Start key. (The machine will then start scanning the test pattern.)
8. Touch [OK] and repeat steps from 2 through 7 twice (a total of three times).
• If the image is faulty, perform the troubleshooting procedures for image problems.
: 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.
: It gives the highest priority to increasing the number of
images to be stored in the memory as it adjusts.
8. Utility Mode
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