HP 2700n Service Manual - Page 104
Step 4: developing, Transfer stage, Step 5: media feed, Step 6: image transfer
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Step 4: developing Toner acquires a negative charge as a result of the friction from the developing cylinder rotating against the developing blade. When the negatively charged toner comes in contact with the drum, it adheres to the electrostatic latent image. When the toner is on the drum the image becomes visible. Transfer stage Step 5: media feed The printer generates electrostatic force to pull a sheet of print media to the ETB. The sheet adheres to the belt and travels between the ETB engaged motor and the attraction roller. The attraction roller transfer positive dc bias to the media so that the negatively charged toner can be easily transferred from the drum to the sheet. Figure 4-13 Media feed Step 6: image transfer The ETB carries the positively charged media over the photosensitive drum. As it passes between the transfer roller and the drum, the transfer roller applies a positive dc bias to the belt. The negatively charged media and belt attract the negatively charged toner from the drum surface. This process is repeated for each toner color. 86 Chapter 4 Theory of operation ENWW