Transfer Output Fine Adjustment - Konica Minolta bizhub C650 Service Manual

Field Service Ver. 8.0 Jun. 2008
10.6.6

Transfer Output Fine Adjustment

A. Primary transfer adj.
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
Setting/ 1. Call the Service Mode to the screen.
2. Select [Test Mode] → [Halftone Pattern] to output the red or green test pattern.
Procedure
See P.537
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 [Primary transfer adj.].
6. Select the color.
7. Change the setting value using the [+] / [-] keys.
8. 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 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.
B. Secondary transfer adj.
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 • The default setting is 0.
Range
Adjustment To increase the ATVC value (in the direction of a foggier image),
Instructions increase the setting value.
To decrease the ATVC value (in the direction of a less foggy image),
decrease the setting value.
Setting/ 1. Call the Service Mode to the screen.
2. Touch these keys in this order: [Imaging Process Adjustment] → [Transfer Output
Procedure
Fine Adjustment].
3. Select [Secondary transfer adj.].
4. Select the side of the image (1st side or 2nd side), on which the transfer failure
occurs.
NOTE
• For envelopes and long paper, only 1st side can be selected.
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5. Select the paper type with the transfer failure.
6. Enter the new setting from the [+] / [-] keys.
7. Touch [END] to validate the adjustment value.
8. Check the print image for any image problem.
-8 to +7 (step: 1)
-8 to +7 (step: 1)
10. Service Mode
465
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