Sharp FO-3150 Service Manual page 48

FO-3150U/C
7. PRINT PROCESS
7-1. Image forming process
Normal paper is used as print paper. A laser beam is used to expose
on the OPC surface to form latent electrostatic images, which are
developed into visible images (toner images) and are transferred on
paper. The basic operation is composed of the five processes: charg-
ing, exposure, development, transfer, and cleaning.
7-2. System diagram
DC-850V
AC600V(P-P)
Main
charger
brush
DC+500V
Separation
electrode
Laser
beam
Scanning
mirror
No.1 ~ No.3
Mirrors
Develo-
ping
roller
Photoconductor
drum
DC-250V
Transfer
roller
DC+3500V
AC600V(P-P)
Laser beam
generator
Toner
DC-310V
Paper
Fig. 7
3 – 4
Image
data
Printer PWB
High voltage
section