Background Voltage Margin; Transfer Adjust - Konica Minolta bizhub C450 Service Manual

Field Service Ver. 1.0 Mar. 2005
10.6.8

Background Voltage Margin

Functions • 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 • Use when a foggy background occurs due to a printer problem
Adjustment
Range
Adjustment To make the background level foggier, increase the setting value.
Instructions To make the background level less foggy, decrease the setting value.
Adjustment 1. Call the Service Mode to the screen.
2. Touch these keys in this order: "Imaging Process Adjustment" → "Background Volt-
Procedure
age Margin."
3. Select the color to be adjusted.
4. Enter the new setting from the 10-Key Pad.
5. Touch "END" to return to the "Image Adjust" menu screen.
6. Touch "Stabilizer."
7. Touch "Stabilization Only."
8. Press the Start key to validate the adjustment value.
9. Check the copy 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.
10.6.9

Transfer Adjust

A. 2nd Transfer Adjust
Functions • Adjust the 2nd image transfer output (ATVC) on the 1st page and the 2nd page for
each paper type.
Use • To use when the transfer failure at the trailing edge occurs.
Adjustment
Range
Adjustment To increase the ATVC value (in the direction of a foggier image), decrease the setting
Instructions value.
To decrease the ATVC value (in the direction of a less foggy image), increase the set-
ting value.
Adjustment 1. Call the Service Mode to the screen.
2. Touch these keys in this order: "Imaging Process Adjustment" → "Transfer Adjust."
Procedure
3. Select the side of the image (First side or Second side), on which the transfer failure
at the trailing edge occurs.
4. Select the paper type with the transfer failure at the trailing edge.
5. Enter the new setting from the 10-Key Pad.
6. Touch "END" to validate the adjustment value.
7. Check the copy image for any image problem.
"0" (-5 to +5)
"0" (-5 to +5)
10. Service Mode
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