Cleaning the drum unit. Brother 5450DN, HL-5450DNT, HL-5450DN

Routine Maintenance

Cleaning the drum unit

If your printout has white or black dots at 94 mm intervals, the drum may have foreign material, such as glue from a label stuck on the drum surface. Follow the steps below to solve the problem.

a Make sure that the front cover is closed and the power cord is plugged in.

b Turn on the machine and wait until the machine is in Ready mode.

c Press Go two times. The machine will print the drum dot check sheet.

d Leave the machine turned on for 10 minutes for the internal fan to cool the extremely hot parts inside the machine.

e Turn off the machine.

f Press the front cover release button and then open the front cover.

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5 g Take out the drum unit and toner cartridge assembly.

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Routine Maintenance

WARNING

After you have just used the machine, some internal parts of the machine will be extremely hot. Wait for the machine to cool down before you touch the internal parts of the machine.

Important

• We recommend that you put the drum unit and toner cartridge assembly on a piece of disposable paper or cloth in case you accidentally spill or scatter toner.

• Handle the drum unit and toner cartridge assembly carefully. If toner scatters on your hands or clothes, immediately wipe or wash it off with cold water.

• To prevent damage to the machine from static electricity, DO NOT touch the electrodes shown in the illustration.

5 h Push down the green lock lever and take the toner cartridge out of the drum unit.

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Routine Maintenance i Turn the drum unit as shown in the illustration. Make sure that the drum unit gear (1) is on the left hand side.

1 j Use the numbered markers next to the drum roller to find the mark. For example, a dot in column 2 on the check sheet would mean that there is a mark in the “2” region of the drum.

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Routine Maintenance k Turn the drum unit gear toward you by hand while looking at surface of the suspected area.

l When you have found the mark on the drum that matches the drum dot check sheet, wipe the surface of the drum gently with a cotton swab until the mark on the surface comes off.

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Important

DO NOT clean the surface of the photosensitive drum with a sharp object or any liquids.

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Routine Maintenance m Put the toner cartridge back into the drum unit until you hear it lock into place. If you put the cartridge in correctly, the green lock lever on the drum unit will lift automatically.

Note

Make sure that you put in the toner cartridge properly or it may separate from the drum unit.

n Put the drum unit and toner cartridge assembly back into the machine.

5 o Close the front cover of the machine.

p Turn on the machine.

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