T R O U B L E S H O O T I N G A N D M A I N T E N A N C E

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3Wipe the electric terminals with isopropyl alcohol on a cotton swab.

4Wipe the gears with a clean dry cloth.

5Gently wipe the scanner window and the toner sensor with a clean soft dry cloth. Do NOT use isoproply 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.

1Carefully turn the drum unit upside down.

2Clean the primary corona wire inside the drum unit by gently sliding the tab from right to left several times.

3Return 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.

4Install the drum unit into the fax machine.

See “Replacing the Drum Unit” on pages 117–121.

5Close the top cover.

6Plug in the power cord.

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Brother FAX 3750, FAX 2750 manual 111, Cleaning the Drum Unit