12.6 Imaging Process Adjustment; Gradation Adjust - Konica Minolta bizhub C360 Service Manual

Field Service Ver. 2.1 Feb. 2012

12.6 Imaging Process Adjustment

12.6.1

Gradation Adjust

• It will not be displayed when the following setting is set to "ON".
→
[Service Mode]
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A. Use
• To make an automatic adjustment of gradation based on the test pattern produced and
the readings taken by the scanner.
• Color reproduction performance becomes poor.
• The imaging unit, drum unit or developing unit has been replaced.
• The image transfer belt unit has been replaced.
✽ The Adj. Values of "Dark" and "Highlight" shown on the gradation adjust screen represent
how much corrections are made to produce an ideal image output. Conv. Value shows
the difference from the ideal image density.
✽ The closer the Conv. Value to 0, the more ideal the image.
Stablizer : Before gradation adjust, perform image stabilization.
Print : Priority is image gradation reproducibility (priority on gradation) as well as
reproducibility of characters and lines (priority on resolution).
Copy : Priority is to increase the number of images that can be stored in the mem-
ory (priority on compression). The adjustment conforms to FEET (non-
screen).
B. Procedure
1. Call the Service Mode to the screen.
2. Touch these keys in this order: [Image Process Adjustment] → [Gradation Adjust].
3. Touch [Stabilizer] and the Start key to perform image stabilization.
NOTE
• Before executing Gradation adjust, be sure to perform Stabilizer.
4. Select Print or Copy and select the paper size on which test pattern is printed.
5. Press the Start key to let the machine produce a test pattern.
NOTE
• When the image stabilization performed in step 3 is NG, the Start key stops func-
tioning.
• When one of the alert codes, P-5, P-6, P-7, P-8, P-9, and P-28 is on the screen and
[Printer] is selected, the Start key stops functioning.
6. Place the test pattern produced on the original glass.
NOTE
• Depending on the size of the test pattern, it is set in a different position. Set the
test pattern according to the instructions displayed on the control panel.
[Image Process Adjustment]
12. SERVICE MODE
→
[Grad/Dev AC Bias V Selection]
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