Maintenance

This category describes how to perform routine cleaning operations, and replace a toner cartridge.



Cleaning the Machine

Note the following before cleaning your machine:

  • Make sure no document is stored in memory, then turn OFF the main power switch and disconnect the power cord.
  • Use a soft cloth to avoid scratching the components.
  • Do not use tissue paper, paper towels, or similar materials for cleaning; they can stick to the components or generate static charges.

Remark
  • Never use volatile liquids such as thinner, benzene, acetone, or any other chemical cleaner to clean the machine. These can damage the machine components.
  • When you turn OFF the main power switch, the data stored in memory will be retained for approximately 5 minutes. To check the jobs stored in memory, see the following:

Exterior

Interior

Fuser Roller

Scanning Area


Exterior

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Clean the exterior of the machine.

  1. Turn OFF the main power switch and disconnect the power cord.
  1. Wipe the machine's exterior with a clean, soft, lint-free cloth dampened with water or diluted dishwashing detergent solution.
  1. Wait for the machine to dry, then reconnect the power cord and turn ON the main power switch.


Interior

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Clean the machine's print area periodically to prevent toner powder and paper dust from accumulating inside.

  1. Turn OFF the main power switch and disconnect the power cord.
  1. Hold the front side of the operation panel with your hands.
  1. Lift the scanning platform (A) until it is locked. (You will hear an audible "click.")
  1. Hold the grip (A) on the right front side of the toner cover.
  1. Open the toner cover.
  1. Remove the toner cartridge.
  • Do not touch the rollers and parts which have labels "CAUTION! Hot surface avoid contact" on. They become very hot during use.
  • To avoid exposing the toner cartridge to light, place it in its protective bag or wrap it in a thick cloth.

  • Do not open the drum protective shutter (A) on the toner cartridge. Print quality may deteriorate if the drum surface is exposed to light or is damaged.
  • Always hold the toner cartridge by its handle.
  1. Use a clean, soft, dry, lint-free cloth to remove any toner or paper debris from the machine's interior.
  • Do not touch the fixing assembly (A) as it becomes very hot during use.
  • Do not touch the transfer roller (B) as this can damage the machine.

  • If loose toner comes into contact with your skin or clothing, wash with cold water. Warm water will set the toner.
  1. Hold the toner cartridge by its handle (A).
  1. Insert the toner cartridge so that the protrusion (A) on the right side of the toner cartridge fits into the guide (B) located on the right side of the machine and slide it down parallel to the guide.
  1. Push the toner cartridge to make sure it is properly set in the machine.
  1. Hold the grip (A) on the right front side of the toner cover.
  1. Close the toner cover.
  1. Lower the scanning platform.
  • Be careful not to get your fingers caught.
  • If you cannot close the toner cover, do not force it to close. Open the cover and make sure the toner cartridge is properly set in the machine.
  1. Reconnect the power cord and turn ON the main power switch.


Fuser Roller

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If black streaks appear with printing, the fuser roller in the main unit may be dirty. Should this occur, clean the fuser roller in the following procedure. The roller should also be cleaned each time the toner cartridge is replaced. Load a sheet of blank A4 paper into the multi-purpose tray and start cleaning.


Remark
  • Use standard paper as the cleaning paper.
  • Cleaning the roller takes approximately 130 seconds.
  • When some jobs are stored in memory, this function is not available.
  1. Press [Menu].
  1. Press [] or [] to select <ADJUST./CLEANING>, then press [OK].
  1. Load a sheet of blank A4 paper in the multi-purpose tray.

  • For MF4380dn/MF4370dn/D450


  • For MF4350d/MF4340d/MF4330d/
    MF4320d/D440

  1. Press [] or [] to select <FIX. UNIT CLEANING>, then press [OK].

Cleaning starts.

  • Throw away the cleaning paper after use.


Scanning Area

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Keep the scanning area clean to avoid dirty copies or faxes to be sent.


Platen Glass

ADF (For MF4380dn/D450)

ADF (For MF4370dn/MF4350d/MF4330d/D440)


Platen Glass

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Clean the platen glass and the underside of the ADF by following the procedure below.

  1. Open the ADF.
  1. Clean the platen glass and the underside of the ADF with a cloth dampened with water. Then, wipe the area with a soft, dry cloth.
  • Do not dampen the cloth too much, as this may tear the document or damage the machine.
  1. Close the ADF.
  • Be careful not to get your fingers caught.


ADF (For MF4380dn/D450)

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If your documents have black streaks or appear dirty after copying them using the ADF, this may be caused by pencil lead rubbing off the documents and onto the roller. Clean the ADF scanning area and roller.

  1. Turn OFF the main power switch and disconnect the power cord.
  1. Open the ADF cover.
  1. Clean the rollers (A) inside the ADF with a cloth dampened with water. Then wipe the area with a soft, dry cloth.
  • Do not dampen the cloth too much, as this may tear the document or damage the machine.
  1. Close the ADF cover.
  • Be careful not to get your fingers caught.
  1. Reconnect the power cord and turn ON the main power switch.


ADF (For MF4370dn/MF4350d/MF4330d/D440)

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If your documents have black streaks or appear dirty after copying them using the ADF, this may be caused by pencil lead rubbing off the documents and onto the roller. Clean the ADF scanning area and roller.

  1. Turn OFF the main power switch and disconnect the power cord.
  1. Open the ADF cover.
  1. Clean the rollers (A) inside the ADF with a cloth dampened with water. Then wipe the area with a soft, dry cloth.
  • Do not dampen the cloth too much, as this may tear the document or damage the machine.
  1. Close the ADF cover.
  • Be careful not to get your fingers caught.
  1. Reconnect the power cord and turn ON the main power switch.


Replacing the Toner Cartridge

This section describes how to replace or handle the toner cartridges and precautions on storing them.


When a Message Appears

Redistributing Toner

Replacing the Toner Cartridge with a New One


When a Message Appears

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Toner cartridges are consumable products. If the toner is running low or out during printing, a message appears in the display.


Message When it is Displayed Contents and Remedies
TONER LOW
PREPARE NEW TONER*
The toner is running low.
  • Distribute toner in the toner cartridge. (See "Redistributing Toner")
  • It is recommended that you replace the toner cartridge before printing a large amount of data.
OUT OF TONER
CHANGE TONER
The toner is running out.
  • Distribute toner in the toner cartridge.
  • If the message persists, replace the toner cartridge. (See "Replacing the Toner Cartridge with a New One")
  • It is recommended that you replace the toner cartridge before printing a large amount of data.

* MF4380dn/MF4370dn/MF4350d/MF4340d only


Redistributing Toner

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When the toner is running low, the message <TONER LOW/PREPARE NEW TONER> appears on the display, redistribute toner in the toner cartridge. We recommend that you prepare a new toner cartridge for future replacement with ease.


Remark
  • Do not touch the rollers and parts which have labels "CAUTION! Hot surface avoid contact" on. They become very hot during use.
  • When <CONT. PRINTING> is set to <ON>, the printed documents may be light or blurred because of lack of toner. The data is erased when the documents are printed out, so you cannot print the same documents again. (See "FAX SETTINGS (MF4380dn/MF4370dn/MF4350d/MF4340d Only).")
  1. Hold the front side of the operation panel with your hands.
  1. Lift the scanning platform (A) until it is locked. (You will hear an audible "click.")
  1. Hold the grip (A) on the right front side of the toner cover
  1. Open the toner cover.
  1. Remove the toner cartridge.
  • Do not touch the rollers and parts which have labels "CAUTION! Hot surface avoid contact" on. They become very hot during use.
  1. Gently rock the toner cartridge several times to evenly distribute toner inside.
  1. Hold the toner cartridge by its handle (A).
  • Do not open the drum protective shutter on the toner cartridge. Print quality may deteriorate if the drum surface is exposed to light or is damaged.
  • Always hold the toner cartridge by its handle.
  1. Insert the toner cartridge so that the protrusion (A) on the right side of the toner cartridge fits into the guide (B) located on the right side of the machine and slide it down parallel to the guide.
  1. Push the toner cartridge to make sure it is properly set in the machine.
  1. Hold the grip (A) on the right front side of the toner cover.
  1. Close the toner cover.
  1. Lower the scanning platform.
  • Be careful not to get your fingers caught.
  • If you cannot close the toner cover, do not force it to close. Open the cover and make sure the toner cartridge is properly set in the machine.


Replacing the Toner Cartridge with a New One

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When the message <OUT OF TONER /CHANGE TONER> appears, replace the toner cartridge with a new one.

When toner empty error occurs while receiving fax, printing fax is interrupted and the received data will be stored in the memory. If you set <CONT. PRINTING> to <ON>, you can keep printing fax documents or reports without replacing the toner cartridge. (See "FAX SETTINGS (MF4380dn/MF4370dn/MF4350d/MF4340d Only).")


Remark
  • Do not touch the rollers and parts which have labels "CAUTION! Hot surface avoid contact" on. They become very hot during use.
  • When <CONT. PRINTING> is set to <ON>, the printed documents may be light or blurred because of lack of toner. The data is erased when the documents are printed out, so you cannot print the same documents again. (See "FAX SETTINGS (MF4380dn/MF4370dn/MF4350d/MF4340d Only).")
  1. Hold the front side of the operation panel with your hands.
  1. Lift the scanning platform (A) until it is locked. (You will hear an audible "click.")
  1. Hold the grip (A) on the right front side of the toner cover.
  1. Open the toner cover.
  1. Remove the toner cartridge.
  1. Take out the new toner cartridge from the protective bag.
  • Do not open the drum protective shutter (A).

  • Save the protective bag. You may need it later when you remove the toner cartridge from the machine.
  1. Gently rock the toner cartridge several times to evenly distribute toner inside.
  1. Place the toner cartridge on a flat surface and pull the seal completely out.
  • If toner is adhered on the removed seal, be careful that your hands or clothes do not get dirty from touching the toner.
  • Do not pull the seal out at an angle.

  1. Hold the toner cartridge by its handle (A).
  • Do not open the drum protective shutter on the toner cartridge. Print quality may deteriorate if the drum surface is exposed to light or is damaged.
  • Always hold the toner cartridge by its handle.
  1. Insert the toner cartridge so that the protrusion (A) on the right side of the toner cartridge fits into the guide (B) located on the right side of the machine and slide it down parallel to the guide.
  1. Push the toner cartridge to make sure it is properly set in the machine.
  1. Hold the grip (A) on the right front side of the toner cover.
  1. Close the toner cover.
  1. Lower the scanning platform.
  • Be careful not to get your fingers caught.
  • If you cannot close the toner cover, do not force it to close. Open the cover and make sure the toner cartridge is properly set in the machine.


Adjusting the Machine

This section describes how you can adjust the settings of the machine to improve print quality and to prevent paper jams, which may occur when a variety of functions are used. It is recommended that you perform these settings regularly to prevent a number of problems from occurring.


Reducing Blur (Special Mode T)

Improving Print Quality (Special Mode U)

Reducing Paper Curl (Special Mode V)

Adjusting Toner Fixing (Special Mode Y)

Reducing Fog (Special Mode Z)


Reducing Blur (Special Mode T)

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Sets whether to prevent blur from appearing on the printouts for copying, receiving info, and reports.

The default settings is <OFF>


Remark
  • When this setting is set to <ON>, the density of printouts may become light.
  1. Press [Menu].
  1. Press [] or [] to select <ADJUST./CLEANING>, then press [OK].
  1. Press [] or [] to select <SPECIAL MODE T>, then press [OK].
  1. Press [] or [] to select <ON> or <OFF>, then press [OK].
  • <OFF>: Does not prevent blur from appearing on the printouts for copying, receiving info, and reports.
  • <ON>: Prevents blur from appearing on the printouts for copying, receiving info, and reports.
  1. Press [Stop/Reset] to return to the standby mode.


Improving Print Quality (Special Mode U)

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Select to improve print quality in high temperature and high humidity conditions or in low temperature and low humidity conditions.

The default settings is <OFF>.

  1. Press [Menu].
  1. Press [] or [] to select <ADJUST./CLEANING>, then press [OK].
  1. Press [] or [] to select <SPECIAL MODE U>, then press [OK].
  1. Press [] or [] to select <OFF>, <MODE1>, or <MODE2>, then press [OK].
  • <OFF>: Select in normal condition.
  • <MODE1>: Select to improve print quality in low temperature and low humidity conditions, or when using thick paper or an envelope.
  • <MODE2>: Select to improve print quality in high temperature and high humidity conditions.
  1. Press [Stop/Reset] to return to the standby mode.


Reducing Paper Curl (Special Mode V)

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Sets whether to prevent small size paper (B5, A5, EXECUTIVE, etc.) from being curled.

The default settings is <OFF>.

  1. Press [Menu].
  1. Press [] or [] to select <ADJUST./CLEANING>, then press [OK].
  1. Press [] or [] to select <SPECIAL MODE V>, then press [OK].
  1. Press [] or [] to select <ON> or <OFF>, then press [OK].
  • <OFF>: Does not prevent small size paper (B5, A5, EXECUTIVE, etc.) from being curled.
  • <ON>: Prevent small size paper (B5, A5, EXECUTIVE, etc.) from being curled.
  1. Press [Stop/Reset] to return to the standby mode.


Adjusting Toner Fixing (Special Mode Y)

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Sets to enhance the fixing characteristics of toner under the conditions of a low temperature environment.

The default settings is <OFF>.


Remark
  • When this setting is set to <ON>, first copy time and the time to resume from the Sleep mode may take longer.
  1. Press [Menu].
  1. Press [] or [] to select <ADJUST./CLEANING>, then press [OK].
  1. Press [] or [] to select <SPECIAL MODE Y>, then press [OK].
  1. Press [] or [] to select <ON> or <OFF>, then press [OK].
  • <OFF>: Does not enhance the fixing characteristics of toner under the conditions of a low temperature environment.
  • <ON>: Enhance the fixing characteristics of toner under the conditions of a low temperature environment.
  1. Press [Stop/Reset] to return to the standby mode.


Reducing Fog (Special Mode Z)

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Sets whether to reduce fog appearing on the printouts for copying, receiving info, and reports.
The default settings is <OFF>.


Remark
  • When this setting is set to <ON>, the density of printouts may become light.
  1. Press [Menu].
  1. Press [] or [] to select <ADJUST./CLEANING>, then press [OK].
  1. Press [] or [] to select <SPECIAL MODE Z>, then press [OK].
  1. Press [] or [] to select <ON> or <OFF>, then press [OK].
  • <OFF>: Does not reduce fog appearing on the printouts for copying, receiving info, and reports.
  • <ON>: Reduces fog appearing on the printouts for copying, receiving info, and reports.
  1. Press [Stop/Reset] to return to the standby mode.


Transporting the Machine

This section describes the required procedures before transporting the machine.


For MF4380dn/MF4370dn/D450

For MF4350d/MF4340d/MF4330d/MF4320d/D440


For MF4380dn/MF4370dn/D450

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Follow this procedure to avoid vibration damage to the machine when transporting it over a long distance.

  1. Turn OFF the main power switch.
  1. Disconnect the power cord and all the cables from the back of the machine.
  1. If you are using the output tray extension, fold the paper stopper, and then push the output tray extension into the machine.
  1. Hold the front side of the operation panel with your hands.
  1. Lift the scanning platform (A) until it is locked. (You will hear an audible "click.")
  1. Hold the grip (A) on the right front side of the toner cover.
  1. Open the toner cover.
  1. Remove the toner cartridge.
  • To avoid exposing the toner cartridge to light, place it in its protective bag or wrap it in a thick cloth.
  • Do not open the drum protective shutter on the toner cartridge. Print quality may deteriorate if the drum surface is exposed to light or is damaged.
  • Always hold the toner cartridge by its handle.
  1. Hold the grip (A) on the right front side of the toner cover.
  1. Close the toner cover.
  1. Lower the scanning platform.
  • Be careful not to get your fingers caught.
  1. Remove the dust cover from the paper cassette.
  1. Open the front panel of the paper cassette.
  1. Remove the paper from the paper cassette.
  1. Remove the paper cassette by lifting up the front-end of the paper cassette and pulling it forward.
  1. Detach the Document feeder tray.

For MF4380dn/D450, Skip to step 17.

  1. Make sure all the covers are closed.
  1. Grip the handles on both sides of the machine and lift it carefully, as shown in the illustration below.
  • Do not lift the machine by any of its attachments. Dropping the machine can cause personal injury.
  • If you have a back problem, make sure to check the weight of this machine before carrying. (See "Specifications.")


For MF4350d/MF4340d/MF4330d/MF4320d/D440

Return to Overview

Follow this procedure to avoid vibration damage to the machine when transporting it over a long distance.

  1. Turn OFF the main power switch.
  1. Disconnect the power cord and all the cables from the back of the machine.
  1. If you are using the output tray extension, fold the paper stopper, and then push the output tray extension into the machine.
  1. Hold the front side of the operation panel with your hands.
  1. Lift the scanning platform (A) until it is locked. (You will hear an audible "click.")
  1. Hold the grip (A) on the right front side of the toner cover.
  1. Open the toner cover.
  1. Remove the toner cartridge.
  • To avoid exposing the toner cartridge to light, place it in its protective bag or wrap it in a thick cloth.
  • Do not open the drum protective shutter on the toner cartridge. Print quality may deteriorate if the drum surface is exposed to light or is damaged.
  • Always hold the toner cartridge by its handle.
  1. Hold the grip (A) on the right front side of the toner cover.
  1. Close the toner cover.
  1. Lower the scanning platform.
  • Be careful not to get your fingers caught.
  1. Remove the dust cover from the paper feeding tray.
  1. Remove the paper from the paper feeding tray.
  1. Store the dust cover inside the machine.
  1. Push the paper guide rail, and then close the paper feeding tray.
  1. Detach the Document feeder tray.

For MF4340d and MF4320d, Skip to step 17.

  1. Make sure all the covers are closed.
  1. Grip the handles on both sides of the machine and lift it carefully, as shown in the illustration below.
  • Do not lift the machine by any of its attachments. Dropping the machine can cause personal injury.
  • If you have a back problem, make sure to check the weight of this machine before carrying. (See "Specifications.")