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1-4 Printer and Troubleshooting Overview
6 Activating paper
As the image is being developed, a sheet of paper is transported to the photoconductor
belt. The PCL board controls this activity. A series of paper pick-up, feed, and timing
rollers guide the paper so the developed image is properly registered with the leading
edge of the sheet.
7 Transferring the image to the paper
Next, the paper contacts the surface of the photoconductor belt. Above the paper and
the belt is the transfer corona, which has a high positive charge, and attracts the devel-
oped image from the belt to the surface of the paper. At this point, you can remove the
printed image to verify print quality, but the toner is not yet fused.
8 Fusing the image to the paper
The vacuum transport unit advances the paper with the developed image to the fuser
unit where heat and pressure bond the toner to the paper. The finished print then
arrives at the paper output tray.
9 Cleaning routine
After a print is made, the photoconductor belt must be cleaned for the next print. The
belt first passes the erase lamp where any remaining latent image is erased. The belt
continues to the cleaning unit where a charged brush rotates against the surface to
remove any residual toner. This toner is recycled to the developer unit for reuse.
Figure 1-1. Cycle of Operation
Toner
Photoconductor
Developer Unit
LED Printhead
Charge Corona
Cleaner
Vacuum Transport
Fuser Unit
Erase Lamp
Transfer Charger
Paper Input
Paper
Output
3
4
5
6
9
8
7
Bitmap
RAM
2
IGS
SI
1
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