Maintenance
Xerox Internal Use Only
Phaser 6600 and WorkCentre 6605
Service Manual
6-21
Adjusting the Transfer Roller Bias
The bias voltage applied to the Transfer Roller (BTR2) controls how the toner transfers from the
Transfer Belt to the paper. If the bias voltage is too low, the toner does not transfer properly, producing
light colors and white spots. If the bias voltage is too high, mottling of the image can occur.
Adjusting the Transfer Roller bias requires entering Service Mode and editing NVM using a specific
Chain-Link code. Refer to “NVM Read and Write (Edit NVM)” on page 2-28 for detailed instructions on
editing NVM values. Refer to the table below for the Chain-Link codes associated with 11 different
paper types.
To adjust the Transfer Roller bias:
1.
Identify the paper type that is producing symptoms of mis-adjusted bias.
2.
Enter Service Mode and navigate to
Printer Diag > Engine Diag > NVM Settings > Edit NVM.
3.
Enter the Chain-Link code for the paper identified in step 1. Refer to the table for the appropriate
Chain-Link code.
CAUTION:
In the following step, do not use values higher than 16.
4.
Adjust the value up or down as necessary to a value with the range 1-16. The default setting is 6.
Parameter
Paper Type
Range
Initial
Chain Link
Plain Paper-L
Hole-Punched
or
Colored
1~16
6
746-500
Plain Paper-H
Plain
1~16
6
746-501
Recycled
Recycled
1~16
6
746-503
Heavier Paper-L
Special or
Heavyweight
Cardstock
1~16
6
746-504
Heavier Paper-H
Special or
Heavyweight
Cardstock
1~16
6
746-505
Coated Paper-M
Lightweight
Glossy
Cardstock
1~16
6
746-512
Coated Paper-H
Heavyweight
Glossy
Cardstock
1~16
6
746-513
Envelope
Envelope
1~16
6
746-509
Label-H
Labels
1~16
6
746-507
Содержание WorkCentre 6605
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