Stabilizer - Konica Minolta bizhub C250 Service Manual

Field Service Ver. 1.0 Jul. 2005
B. 1st Transfer Adjust
Functions • Adjust the output value for the 1st image transfer voltage.
Use • To use when white spots appeared.
Adjustment
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
Setting/ 1. Call the Service Mode to the screen.
2. Select [Test Mode] → [Halftone Pattern] to output the red or green test pattern.
Procedure
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3. When the test pattern image has white spots, adjust with the following procedure.
4. Touch these keys in this order: [Imaging Process Adjustment] → [Transfer Output
Fine Adjustment].
5. Select [1st transfer Adjust].
6. Change the setting value using the [+] / [-] keys.
7. Touch [OK] 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 (94mm pitch) 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 or the color chart when adjusting.
• The value for the 1st image transfer adjustment will be reset when the new
transfer belt unit is detected. The value will be 0.
10.6.5

Stabilizer

A. Stabilization Only
Functions • The image stabilization sequence is carried out without clearing the historical data of
image stabilization control.
Use • Use if an image problem persists even after Gradation Adjustment has been exe-
cuted.
• When D Max Density and Background Voltage Margin of Service mode are changed.
Setting/ 1. Call the Service Mode to the screen.
2. Touch these keys in this order: [Imaging Process Adjustment] → [Stabilization Only].
Procedure
3. Press the Start key to start Stabilizer.
The Start key turns orange and stays lit up orange during the Stabilizer sequence.
4. Stabilizer is completed when the Start key turns green.
"0" (-5 to +5)
10. Service Mode
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