Sharp FO-4500, Service Manual

Page: 64 / 192

10. DEVELOPMENT
Toner is applied to the invisible static image on the PC Drum and a
toner image is created on the surface.
The development is the process of creating a toner image on the PC
Drum by applying toner onto the invisible static electricity image.
8
6
4
1
5
3
7
V (Developing Bias)
PWB-F
PWB-A
CN1
CN4
8
1
1
8
B
V (Lower Seal Bias)
S
V (Toner Blade Bias)
BL
4
7
2
V terminal
(DC-330V)
B
V terminal
(DC-550V)
BL
V terminal
(DC-287V)
S
Fig. 11
Part Name Function
1. Toner Hopper Contains toner.
2. Toner Agitating Screw Agitates the toner in the Toner Hopper and sends the toner to the Toner Transport Roller.
3. Toner Transport Roller Transports the toner to the Sleeve Roller.
4. Doctor Blade Spreads a thin, even coat of toner over the Resin Sleeve. The toner is negatively charged when passing
between this Blade and the Resin Sleeve.
5. Sleeve Roller Rotates the Resin Sleeve.
6. Resin Sleeve Carries the toner to the PC Drum surface for development.
7. Bias Seal Carries the toner remaining on the Resin Sleeve and neutralizes charge.
8. PC Drum Exposed to laser to create an invisible image and rotates to carry the developed image to the paper surface.
FO-4500H
3 – 7