3-14 Service Manual
7100-XXX Lexmark confidential until announce edited 1/4/2007
Step 4: Transfer
First transfer
After the first plane of color is developed on the photodeveloper, the high voltage power supply sends
voltage to the transfer unit so the image on the photodeveloper is transferred to the transfer unit. This takes
place by a direct surface-to-surface contact between the photodeveloper and the transfer unit. This is the
first transfer process.
The photodeveloper continues to rotate around and is cleaned and erased. Then, a new charge is put on
the surface. The laser exposes the photodeveloper, and the next color is developed and transferred to the
transfer unit. This process continues until all four planes of color have been transferred to the transfer unit.
Look at callout 4 in the picture below. This is the where the photodeveloper transfers the toner to the
transfer unit and the first transfer of the EP Process.
Note: Never touch the surface of the transfer unit with your bare hand. The oil from your skin will cause a
charge differential on the surface and toner will not stick properly. The result would be repeating blotches of
voids/light print on a page. The transfer unit would need to be replaced.
Note: Don’t use solvents or other cleaners to clean the transfer unit surface. No matter how careful you are,
the surface will be compromised causing scratches or a charge differential that will produce a void or light
blotch on the printed page. The transfer unit would need to be replaced.
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