Toshiba e-STUDIO 5540C Service Manual page 136

3.13 Transfer unit
3.13.1 General Descriptions
Transfer is a process of decaling a toner image from the photoconductive drum onto paper.
A toner image formed on the photoconductive drum is temporarily transferred onto the transfer belt,
and the toner image is then transferred from the transfer belt onto paper. The first transfer from the
drum to the transfer belt is called the 1st transfer, and the second transfer from the transfer belt to paper
is called the 2nd transfer. To form a color image, the images of yellow (Y), magenta (M), cyan (C) and
black (K) are transferred and overlaid on the transfer belt in order, and then the overlaid images are
transferred onto paper.
After the completion of the 2nd transfer, the residual toner on the transfer belt is scraped off by the
transfer belt cleaning blade and then transported to the waste toner box.
Waste toner auger
Cleaning facing roller
Cleaning facing roller cleaning pad
Tension roller
1st transfer roller ( Y )
1st transfer roller ( M )
Drum
( Y )
Lift roller
Transfer belt contact/release
detection sensor
Transfer belt cleaning blade
e-STUDIO5540C/6540C/6550C/5560C/6560C/6570C
OUTLINE OF THE MACHINE
2nd transfer facing roller
2nd transfer facing roller cleaning pad
1st transfer roller ( C )
1st transfer roller ( K )
Drum
Drum
( C )
( M )
Image quality sensor
Image position aligning sensor
(front/center/rear)
Transfer belt cam motor
2nd transfer roller
contact/release detection sensor
Fig. 3-50
2nd transfer roller
Transfer belt
Drum
( K )
2nd transfer roller
cleaning blade
2nd transfer roller lubricant unit
© 2011 - 2015 TOSHIBA TEC CORPORATION All rights reserved
3 - 88
2nd transfer side paper
clinging detection sensor
TRU waste toner amount
detection sensor
TRU waste toner box