Output Technology LaserMatrix LM2405, Руководство оператора

Страница: 119 / 249

Operator's Guide 6-17
Dirty Charging Corona Wire
The charging corona wire in the drum cartridge pre-charges the drum to
-700 vdc. The laser beam selectively discharges portions of the drum so
that toner can be attracted to the invisible, latent image.
A dirty charging corona wire in the drum cartridge fails to pre-charge that
portion of the drum so that toner is attracted to this uncharged area. A
dirty charging corona wire causes dark and usually very distinct vertical
black streaks on the printout.
Cleaning Charging Corona Wire
To clean the charging corona wire, first read and heed the preceding
Cautions, and then proceed as follows:
1. Turn off printer.
2. Open top cover of printer.
3. Locate corona cleaning brush in the drum cartridge and lift off the
brush. (See the following illustration.)
4. Lift off plastic cover over charging corona wire.
5. Gently (because corona wires are easily broken) move the corona
cleaning brush from left to right along each of the four sections of the
exposed corona wire.
Take care not to contaminate the grid below the wire with dirt, but do
not attempt to use the brush to clean the grid.