Transfer - KIP 9000 Service Manual

3. 2. 7

Transfer

The Transfer Corona takes positive discharging to charge the printing media positively. As the
toner existing on negative Drum surface is attracted to the positive printing media, the toner image
can be transferred onto the media.
The voltage supplied to the Transfer Corona Wire is as follows.
Transfer Corona Wire : +520V +/-30V (When the Insulated Drum is used.)
Printing media
Reference
The Transfer Guide Plate in front of the Transfer Corona is grounded through the Varistor
which keeps only the necessary positive electric charges while dismissing excess charges to
the ground.
1. If the Transfer Guide Plate is directly grounded, the positive electric charges given to the
printing media will escape to the ground through the Transfer Guide Plate. As the printing
media is not enough charged positive, much toner remains on the Drum without being
transferred onto the media. The image looks very light in this case.
2. If the Transfer Guide Plate is completely floated from the ground so as to block the
escape route of the positive electric charges, it collects too much positive charges
because the Transfer Corona exists nearby it. As the Transfer Guide Plate is more
strongly charged positive than required, it attracts the toner flying inside the machine. This
toner attracted onto the Transfer Guide Plate will cause the dirt on the back of the print.
Drum
-50V
-50V
-50V -50V
Transfer Guide Plate
3-12
Positive electric charges
Transfer Corona
K115sm3e1.doc