Konica Minolta bizhub C658 Service Manual page 881

bizhub C658/C558/C458/C368/C308/C258
Function
Utility mode
Print function (printer driver
settings)
(2) Procedure
1. Call the Service Mode to the screen.
2. Select [Printer (resolution)] or [Printer (Gradation)].
3. Select the color to be corrected.
4. Load one of Tray 1, Tray 2, Tray 3, and Tray4 with A4 paper. (Load one of them with Letter only if [Marketing Area] is [US].)
5. Press the Start key to let the machine produce a test pattern.
6. Place the test pattern produced on the original glass.
7. Press the Start key and scan the test pattern.
8. If the scanning finishes successfully, start the 2nd scanning following the instruction on the control panel.
9. Set the test pattern rotated by 180 degrees on the original glass.
10. Press the Start key and scan the test pattern.
11. If the scanning finishes successfully, press [Print Test Pattern] to output the adjusted test pattern.
12. Check the adjusted test pattern.
13. To apply the adjusted correction value, press [Reflect Adj Values], then [Reflect] and [OK].
NOTE
▪ Select [Do Not Reflect] and press [OK] not to apply the adjusted correct value. In this case, the corrected value is not
applied but stored.
▪ Touching [Initialization] clears a stored correction value.
5.6.4 Max Image Density Adj
(1) Use
• 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-adjustment of gamma of each color after gradation adjust.
• An image quality problem is not corrected even after gradation adjust has been run.
(2) Default setting
• 0
(3) Setting range
• -10 to +10 (step: 1 *)
*: 1 step corresponds to 0.03 in density difference.
(4) Procedure
1. Call the Service Mode to the screen.
2. Touch [Imaging Process Adjustment] -> [Max Image Density Adj].
3. Select [Copy] or [Printer].
4. Select the color to be adjusted.
5. Enter the new setting from the 10-key pad and [+/-].
• To increase the maximum amount of toner sticking, increase the setting value.
• To decrease the maximum amount of toner sticking, decrease the setting value.
6. Touch [END] to return to the [Imaging Process Adjustment] menu screen.
7. Touch [Stabilizer].
8. Touch [Stabilization Only].
9. Press the Start key to validate the adjustment value.
10. 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.
5.6.5 Image Background Adj
(1) Use
• To adjust the highlight portion (fog level) to the target reproduction level by making an auxiliary manual fine-adjustment of γ of each color
after gradation adjust.
• Use when a foggy background occurs due to a printer problem.
(2) Default setting
• 0
(3) Setting range
• -5 to +5 (step: 1*)
*: 1 step corresponds to 10 V.
(4) Procedure
1. Call the Service Mode to the screen.
2. Touch [Imaging Process Adjustment] -> [Image Background Adj].
3. Select the color to be adjusted.
4. Enter the new setting from the 10-key pad and [+/-] key.
[User Settings] -> [Printer Settings] -> [Basic Settings] -> [Color
Setting]
[Printer Settings] -> [Quality] -> [Color Setting]
Menu
I-111
I ADJUSTMENT/SETTING > 5. SERVICE MODE
Correction value adjusted items
• [Document]
• [Photo]
• [DTP]
• [Web]