Step 4A: First Transfer - Olivetti d-Color MF920 Service Manual

Step 4a: First transfer

When the latent images are developed on each Photoconductor, the high-voltage power supply sends voltage to
the 1st Transfer Rollers inside the ITU (D).
The charge difference between the developed toner image on the Photoconductor surface and the 1st Transfer
Roller causes the images to transfer to the surface of the ITU belt for each color. This takes place by a direct
surface-to-surface contact between the Photoconductors and the ITU belt.
Service tips
•
Never touch the surface of the ITU belt 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. Then the ITU belt will have to be replaced.
•
Don't use solvents or other cleaners to clean the ITU belt 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. Then the ITU belt will need to be replaced.
Y112730-2 3-61
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