Brother MFC 8440 User Manual
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TROUBLESHOOTING AND ROUTINE MAINTENANCE 12 - 20 Black toner marks across the page The drum unit may be damaged. Put in a new drum unit. (See Replacing the drum unit on page 12-34.) Make sure that you use paper that meets our specifications. (See About paper on page 2-1.) If you use label sheets for laser printers, the glue from the sheets may sometimes stick to the OPC drum surface. Clean the drum unit. (See Cleaning the drum unit on page 12-27.) Do not use paper that has clips or staples because they will scratch the surface of the drum. If the unpacked drum unit is in direct sunlight or room light, the unit may be damaged. White lines across the page Make sure that you use paper that meets our specifications. A rough surfaced paper or thick print media can cause the problem. Make sure that you select the appropriate media type in the printer driver. The problem may disappear by itself. Try printing multiple pages to clear this problem, especially if the printer has not been used for a long time. The drum unit may be damaged. Put in a new drum unit. (See Replacing the drum unit on page 12-34.) Li ne s across the pa ge Clean the inside of the printer and the primary corona wire in the drum unit. (See Cleaning the drum unit on page 12-27.) The drum unit may be damaged. Put in a new drum unit. (See Replacing the drum unit on page 12-34.) Black lines down the page Printed pages have toner stains down the page. Clean the primary corona wire of the drum unit. Make sure the primary corona wire cleaner is at the home position ( ▲). The drum unit may be damaged. Install a new drum unit. (See Replacing the drum unit on page 12-34.) The toner cartridge may be damaged. Put in a new toner cartridge. (See Replacing the toner cartridge on page 12-28.) Make sure that a torn piece of paper is not inside the printer covering the scanner window. The fixing unit may be smudged. Call Customer Service. White lines down the page You may clear the problem by wiping the scanner window with a soft cloth. (See Cleaning the printer on page 12-26.) The toner cartridge may be damaged. Put in a new toner cartridge. (See Replacing the toner cartridge on page 12-28.) Page skewed Make sure the paper or other print media is loaded properly in the paper tray and that the guides are not too tight or too loose against the paper stack. Set the paper guides correctly. If you are using the manual feed tray (or the multi-purpose tray). (See How to load paper on page 2-5.) The paper tray may be too full. Check the paper type and quality. (See About paper on page 2-1.) Curl or wave Check the paper type and quality. High temperatures and high humidity will cause paper to curl. If you don’t use the printer very often, the paper may have been in the paper tray too long. Turn over the stack of paper in the paper tray. Also, try fanning the paper stack and then rotating the paper 180° in the paper tray. Try printing using the straight-through output path. (See How to load paper on page 2-5.) Examples of poor print qual ityRecommendation ABCDEFGH abcdefghijk ABCD abcde 01234 ABCDEFGH abcdefghijk ABCD abcde 01234 ABCDEFGH abcdefghijk ABCD abcde 01234 ABCDEFGH abcdefghijk ABCD abcde 01234 ABCDEFGH abcdefghijk ABCD abcde 01234 ABCDEFG H ab cdefg hijk ABCD abcde 01234
12 - 21 TROUBLESHOOTING AND ROUTINE MAINTENANCE Wrinkles or creases Make sure that paper is loaded properly. Check the paper type and quality. (See About paper on page 2-1.) Try printing using the straight-through output path. (See How to load paper on page 2-5.) Turn over the stack of paper in the tray or try rotating the paper 180° in the input tray. The drum unit is a consumable item and it is necessary to replace it periodically. Examples of poor print qualityRecommendation B DEFGH abc efghijk ACD bcde134
TROUBLESHOOTING AND ROUTINE MAINTENANCE 12 - 22 Packing and shipping the MFC Whenever you transport the MFC, use the packing materials that came with your machine. If you do not pack the MFC correctly, you may void your warranty. 1Turn the MFC power switch off. 2Unplug the MFC from the telephone wall jack. 3Unplug the MFC from the AC outlet. Lock the Scanner Lock 4Push the Scanner Lock Lever down to lock the scanner. This lever is located on the left of the scanner glass. Caution Damage caused to your MFC by failure to lock the scanner before moving and shipping may void your warranty. 5Open the front cover. Scanner Lock Lever
12 - 23 TROUBLESHOOTING AND ROUTINE MAINTENANCE 6Remove the drum unit and toner cartridge assembly. Leave the toner cartridge installed in the drum unit. 7Place the drum unit and toner cartridge assembly into the plastic bag and seal the bag. 8Close the front cover. Fold down the face-down output tray flap. Remove the telephone line cord. 9Wrap the MFC in the plastic bag and place it in the original carton with the original packing material.
TROUBLESHOOTING AND ROUTINE MAINTENANCE 12 - 24 10Pack the drum unit and toner cartridge assembly, telephone line cord, AC cord and printed materials in the original carton as shown below: 11Close the carton and tape it shut. If you are returning the MFC to Brother as part of the Exchange Service, pack only the MFC. Keep all separate parts to use with your ‘Exchange’ machine.
12 - 25 TROUBLESHOOTING AND ROUTINE MAINTENANCE Routine maintenance Cleaning the scanner Turn the MFC power switch off and lift the document cover. Clean the scanner glass and glass strip with dry cloth and the white film with isopropyl alcohol on a lint free cloth. If the screen still displays a scanner error, call Brother Customer Service for assistance at 1-800-284-4329 ( in USA) or 1-877-BROTHER ( in Canada). White Film Document Cover Glass strip White film
TROUBLESHOOTING AND ROUTINE MAINTENANCE 12 - 26 Cleaning the printer Caution ■Do not use isopropyl alcohol to remove dirt from the control panel. It may crack the panel. ■ Do not use isopropyl alcohol to clean the laser scanner window. ■ Do not touch the scanner window with your finger. ■ The drum unit contains toner, so handle it carefully. If toner scatters and your hands or clothes get dirty, immediately wipe or wash it off with cold water. 1Turn the MFC power switch off and open the front cover. 2Remove the drum unit and toner cartridge assembly. WARNING Just after you have used the MFC, some internal parts of the machine are extremely HOT! When you open the front cover of the MFC, never touch the shaded parts shown in the diagram below. 3Gently clean the scanner window by wiping it with a clean soft dry cloth. Do not use isoproply alcohol. Front view HOT! Laser Scanner Window
12 - 27 TROUBLESHOOTING AND ROUTINE MAINTENANCE Cleaning the drum unit We recommend placing the drum unit and toner cartridge assembly on a cloth or large disposable paper to avoid spilling and scattering toner. 1Clean the primary corona wire inside the drum unit by gently sliding the blue tab from right to left several times. 2Return the blue tab and snap it into the Home position ( ▼). Caution If the blue tab is not at Home position ( ▼), printed pages may have vertical stripes. 3Reinstall the drum unit and toner cartridge assembly into the MFC. (See Replacing the drum unit on page 12-34.) 4Close the front cover. 5Plug in the power cord first, then the telephone cord. Corona Wire Tab Home Position( ▼)
TROUBLESHOOTING AND ROUTINE MAINTENANCE 12 - 28 Replacing the toner cartridge The MFC can print up to 6,700 pages using a high yield toner cartridge. When the toner cartridge is running low, the LCD shows Toner Low . The MFC is supplied with a standard toner cartridge that must be replaced after approximately 3,500 pages. Actual page count will vary depending on your average type of original (i.e., standard letter, detailed graphics). Discard the used toner cartridge according to local regulations, keeping it separate from domestic waste. Be sure to seal the toner cartridge tightly so toner powder does not spill out of the cartridge. If you have questions, call your local waste disposal office. We recommend that you clean the MFC when you replace the toner cartridge. It is a good idea to keep a new toner cartridge ready for use when you see the Toner Low warning.
12 - 29 TROUBLESHOOTING AND ROUTINE MAINTENANCE How to replace the toner cartridge WARNING Just after you use the MFC, some internal parts of the machine will be extremely HOT! So, never touch the shaded parts shown in the illustration. 1Open the front cover and pull out the drum unit. Caution ■ Place the drum unit on a drop cloth or large piece of disposable paper to avoid spilling and scattering the toner. ■ To prevent damage to the MFC from static electricity, do not touch the electrodes shown below. HOT!