Laser Exposure; Development .1; Drum Cleaning - Epson EPL-5000 Service Manual

2.1.1.3 Laser Exposure

Laser exposure is the process of creating an invisible static electric image on the PC drum with laser
beams emitted from the printhead unit.
mirror counterclockwise to produce a laser light scan. (One side of the
The SOS (start of scan) sensor detects the laser rays from the SOS mirror and outputs the SOS
signals to make the starting position of each line of the image uniform.
Laser
Invisible
image
2.1.1.4 Development
is the process of creating a toner image on the PC drum by applying toner to the
Development
invisible static electric
image.
sleeve. When the toner passes between the doctor blade and the flexible sleeve, it becomes
negatively charged.
the development with the developing bias voltage.
No positive toner is transported, and the doctor blade is charged to prevent printing from having a
foggy background.
Resin Sleeve
PC Drum

2.1.1.5 Drum Cleaning

After the image is transferred onto paper, any remaining toner on the
cleaning blade and collected in the used toner bottle.
Rev.
mirror motor (scanner motor) rotates the four-sided
Sos
Figure 2-6. Laser Exposure
doctor blade spreads a thin, even coat of toner over the flexible
flexible sleeve transports toner to the surface of the PC drum and controls
Figure 2-7. Development
Manual
mirror
Print Head
Motor
Doctor
+
*
*
Sleeve
drum is scraped off by the
produces one scan.)
'
+
PC Orum
Roller
2-5