Инструкции По Обслуживанию для HP color laserjet 2550 series

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Step 10: roller charging (transfer-belt cleaning roller)
The transfer-belt cleaning roller, to which a dc positive bias is applied, imparts a positive
charge to the residual toner on the transfer belt. This positive charge is stronger than the
positive charge applied in step 8, so the earlier charge now behaves like a negative charge.
Figure 4-25.
Step 9: roller charging (transfer belt cleaning roller)
ENWW
Image-formation system
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