Background Margin; Transfer Output Adj - Konica Minolta Magicolor 8650 Service Manual

Field Service Ver. 2.0 Nov. 2007
10.9.3

Background 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 • The default setting is 0.
Range
Adjustment To make the background level foggier, decrease the setting value.
Instructions To make the background level less foggy, increase the setting value.
1. Select [Service Mode] → [ProcessAdjustment] → [Background Margin].
Setting/
Procedure 2. Select the color to be adjusted.
3. Enter the new setting from the
4. Press the Menu/Select to return to the [ProcessAdjustment] menu screen.
5. Select [Stabilization].
6. Select [StabilizationOnly].
7. Press the Menu/Select key to validate the adjustment value.
8. Check the printed 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.
10.9.4

Transfer Output Adj

A. 1st Transfer
Functions • Adjust the output value for the 1st image transfer voltage.
Use • To use when white spots appeared.
Adjustment • The default setting is 0.
Range
Adjustment Adjust the output value for the 1st image transfer voltage by;
Instructions Increasing it: Increase the setting value (white spots will decrease)
Decreasing it: Decrease the setting value
1. Select [Service Mode] → [Test Mode] → [Halftone Pattern] to output the red or green
Setting/
Procedure test pattern.
See P.224
2. When the test pattern image has white spots, adjust with the following procedure.
3. Select [Service Mode] → [ProcessAdjustment] → [TransferOutputAdj] → [1st Trans-
fer].
4. Select the color.
5. Change the setting value using the
6. Press the Menu/Select key to set the adjustment value.
Gradually increase the adjustment value to the acceptable white spots level while
checking the test pattern.
NOTE
• PC Drum memory may occur by taking measure to white spots occurred by
increasing the 1st image transfer voltage to adjust it.
Check the image on the test print when adjusting.
Confidential – for internal use only, do not distribute
-5 to +5 (step: 1)
and keys.
-8 to +7 (step: 1)
and keys.
10. Service Mode
237