2-4 Phaser 6300/6350 Color Laser Printer Service Manual
7. Tertiary Transfer: The finished toner image on IDT2 is transferred onto the
print media using the biasing charges supplied by the Transfer Roller. The
conductive Transfer Roller receives a high positive voltage from the HVPS that
puts it at a higher potential than IDT2. Since the Transfer Roller is located behind
the print media, the 4-color toner image is attracted to the high potential and
transfers to the surface of the print media.
8. Cleaning: The IDT2 cleaner consists of a conductive roller brush rotating in
contact with IDT2 after the point where the toner is transferred to the print media.
The cleaner receives a high positive voltage from the HVPS allowing it to
electrically attract any toner particles remaining on IDT2. Toner remaining on
IDT 2 after the image transfer to the print media is temporarily stored in the IDT2
cleaner.
9. Static Elimination: The positive charge on the print media can cause image
quality problems by scattering toner. To prevent this, negative DC voltage from
the HVPS is applied to the back side of the print media by the Detack Saw,
located on the Transfer Roller. This negative charge neutralizes and eliminates
the static charge on the print media resulting from the tertiary transfer.
10. Fixing: The initial image is unstable and easily smeared. To fix the image, the
print media goes through the Fuser where it passes between a pressure belt and
the heat roller. The toner is fused onto the print media by the combination of heat
and pressure.
11. Cleaning: During the general cleaning process, the voltage applied to the IDT
rollers and drums go through a cycle of changes to move the negative and
positive charged toner particles from the cleaners and IDTs and then the Transfer
Roller. The toner stored in the IDT1 cleaner, the IDT 2 cleaner is removed and
deposited into the Imaging Unit waste toner reservoir. Toner from the Transfer
Roller, charge roller and refresher is also removed and deposited into the Transfer
Roller waste toner reservoir. In each case the voltage at the point of attraction is
set high and the voltage at the point of disposal is set to 0V with the result that the
toner is moved to the high potential until at last it is deposited on the Transfer
Roller. Toner is removed from the Transfer Roller by the attached cleaning blade
and deposited in the attached waste toner reservoir.
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