151
TROUBLESHOOTING AND MAINTENANCE
1
Open the top cover.
2
Remove the drum unit assembly.
3
Wipe the electric terminals with isopropyl alcohol on a cotton swab.
4
Wipe the gears with a clean dry cloth.
5
Gently wipe the scanner window and the toner sensor with a clean
soft dry cloth. Do not use isopropyl alcohol to clean the scanner
window or the toner sensor.
Cleaning the Drum Unit
We recommend you place the drum unit on a drop cloth or large piece of
disposable paper to avoid spilling and scattering toner.
1
Turn the drum unit upside down carefully.
2
Clean the primary corona wire inside the drum unit by gently sliding
the tab from right to left several times.
3
Return the tab to the home position (mark position) before
reinstalling the drum unit.
Home Position ()
Tab Corona Wire

CAUTION

If you do not position the tab at the home position, printed pages may
have vertical stripes.
4
Install the drum unit into the machine.
See the section “Replacing the Drum Unit” in this chapter.
5
Close the top cover.
6
Plug in the power cord.
7
Connect the telephone line.