Toshiba e-STUDIO4500c Service Manual page 807

August 2006
1. Image Transfer Rollers (
The positive charge applied by the transfer power pack to these sponge rollers
(one for each PCU) pulls the developed images from the drums down onto the
ITB.
2. ITB (Image Transfer Belt)
Receives the toner images from the four drums and holds them until they are
transferred to paper. During a full-color job, all the drums (Y, C, M, K) are in
contact with the ITB. During a black-and-white job, the ITB is lowered and the Y,
C, M drums separate from the ITB and only the black (K) drum contacts the ITB.
3. Transfer Power Pack
Applies the positive bias to the image transfer rollers to pull the developed
toner images off the drums and onto the ITB. Also applies a negative bias to
the ITB bias roller to push the images off the ITB and onto the paper.
4. ITB Drive Roller
The ITB drive motor turns this roller, which drives the ITB belt.
5. ID/MUSIC Sensor Roller
This idle roller is directly opposite the two ID sensors and three MUSIC sensors.
It ensures that the belt is positioned correctly close to the sensors for accurate
readings of the ID sensor patterns and MUSIC patterns on the ITB.
6. Belt Pressure Roller
Presses down on the ITB and paper to hold them in place as they enter the nip
between the PTR and PTR idle roller (this is where the images are transferred
from the ITB to paper).
7. Lubricant Bar
Lubricates the PTR to facilitate cleaning.
8. PTR Cleaning Blade
Removes residual toner on the PTR after the PTR cleaning brush roller cleans
the PTR.
9. PTR Waste Toner Collection Coil
Toner removed from the PTR by the PTR cleaning brush roller and PTR
cleaning blade falls into the rotating coils. It is then moved to the transverse
waste toner collection coil and finally to the waste toner bottle.
10. PTR Cleaning Brush roller
Removes residual toner from the PTR after the image is transferred from the
ITB to paper.
IMAGE TRANSFER AND PAPER TRANSFER
, , ,
Y C M K)
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