Protective-glass cleaners
Each laser/scanner has two openings that allow the laser beam to pass to the surface of the photosensitive
drum. These openings are covered by protective glass. When the protective glass gets dirty (for example, by
paper dust or toner) a protective-glass cleaner (PGC) cleans them.
NOTE: When a glass is dirty, streaks appear on the printed page in the process direction.
The PGC is a cleaning pad that slides along the laser shutter. With the front door open, the laser shutter is
positioned over the glass. As a toner cartridge is inserted, the cleaning pad is pushed down and wipes the
glass. When the front door is closed after cartridge insertion, the laser shutter (and PGC) move away from the
glass that allows the laser beam to pass through the glass.
When the front door is opened, the laser shutter and PGC move back into position over the glass. When the
cartridge is pulled out, the cleaning pad is returned to its starting position at the front of the cartridge
opening.
Figure 1-10 Protective-glass cleaners (PGCs)
ENWW Laser/scanner system 25
To Next Page
Loading...