Brother 7820 N Manual
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Troubleshooting and routine maintenance11 - 16 11 Improving the print quality Examples of poor print qualityRecommendation Faint Check the machine’s environment. Conditions such as humidity, high temperatures, and so on may cause this print fault. (See Choosing a location on page 1-2.) If the whole page is too light, Toner Save mode may be on. Turn off Toner Save mode in the machine’s menu setting or in the printer Properties of the driver. (See Toner Save on page 2-6 or Advanced tab in the Software User’s Guide on the CD-ROM.). — OR — If this problem occurs when making copies or printing received faxes, turn off Toner Save mode in the machine’s menu setting. (See Toner Save on page 2-6.) Clean the laser scanner window and the primary corona wire on the drum unit. (See Cleaning the laser scanner window on page 11-23 and Cleaning the corona wire on page 11-24.) If the print quality has not improved, install a new drum unit. Install a new toner cartridge. (See Replacing the toner cartridge TN-2000 on page 11-25.) Grey backgr ound Make sure that you use paper that meets the recommended specifications. (See About paper on page 1-9.) Check the machine’s environment - high temperatures and high humidity can increase the amount of background shading. (See Choosing a location on page 1-2.) Install a new toner cartridge. (See Replacing the toner cartridge TN-2000 on page 11-25.) Clean the primary corona wire on the drum unit. (See Cleaning the corona wire on page 11-24.) If the print quality has not improved, install a new drum unit. (See Replacing the drum unit (DR-2000) on page 11-28.) Ghost Make sure you use paper that meets our specifications. Rough-surfaced paper or thick print media may cause this problem. (See About paper on page 1-9.) Make sure that you choose the appropriate media type in the printer driver or in the machine’s Paper Type menu setting. (See Basic tab in the Software User’s Guide on the CD-ROM and Setting the Paper Type on page 2-4 in this User’s Guide.) Install a new drum unit. (See Replacing the drum unit (DR-2000) on page 11-28.) Toner specks Make sure that you use paper that meets our specifications. Rough-surfaced paper may cause the problem. (See About paper on page 1-9.) Clean the primary corona wire and the drum unit. (See Cleaning the corona wire on page 11-24 and Cleaning the drum unit on page 11-17.) If the print quality has not improved, install a new drum unit. (See Replacing the drum unit (DR-2000) on page 11-28.) Hollow print Make sure that you use paper that meets our specifications. (See About paper on page 1-9.) Choose Thick paper mode in the printer driver or in the machine’s Paper Type menu setting, or use thinner paper than you are currently using. (See Setting the Paper Type on page 2-4 and Basic tab in the Software User’s Guide on the CD-ROM.) Check the machine’s environment because conditions such as high humidity can cause hollow print. (See Choosing a location on page 1-2.) Clean the primary corona wire on the drum unit. (See Cleaning the corona wire on page 11-24.) If the print quality has not improved, install a new drum unit. (See Replacing the drum unit (DR-2000) on page 11-28.) ABCDEFGH abcdefghijk ABCD abcde 01234 CDEF defgBC bcd23 ABCDEFGH abcdefghijk ABCD abcde 01234 ABCDEFGH abcdefghijk ABCD abcde 01234
Chapter 11 11 - 17 All black Clean the primary corona wire on the drum unit. (See Cleaning the corona wire on page 11-24.) If the print quality has not improved, install a new drum unit. (See Replacing the drum unit (DR-2000) on page 11-28.) White Spots on black text and graphics at 78.5 mm intervals Black Spots at 78.5 mm intervals Cleaning the drum unit Dust, paper powder, glue, and so on may stick to the surface of the photosensitive drum (OPC) and cause black or white spots to appear on printed documents. Make a few copies of a blank, white sheet of paper. (See Making multiple copies on page 8-2.) 1 Remove the drum unit and toner cartridge assembly, and then remove the toner cartridge from the drum unit. 2 Position the print sample in front of the drum unit so you will know the exact position on the drum that is causing the poor print. 3 Turn the black gear on the drum as you check the surface of the OPC drum. Do not touch the OPC drum with your fingers. 4 When you find the substance on the drum surface that matches the print sample, gently dab the surface of the OPC drum with a cotton swab that is lightly dampened with isopropyl alcohol. Do not use a scrubbing or wiping motion because this might damage the drum. Do not try to clean the surface of the OPC drum with a sharp object, such as a ball-point pen, because this might cause permanent damage to the drum unit. If the print quality still has not improved you need to install a new drum. (See Replacing the drum unit (DR-2000) on page 11-28.) Examples of poor print qualityRecommendation 78.5 mm 78.5 mm 78.5 mm 78.5 mm OPC drum surface
Troubleshooting and routine maintenance11 - 18 11 Black toner marks across the page Make sure that you use paper that meets our specifications. (See About paper on page 1-9.) 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 corona wire on page 11-24.) 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. The drum unit may be damaged. Put in a new drum unit. (See Replacing the drum unit (DR-2000) on page 11-28.) 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. (See About paper on page 1-9.) Make sure that you choose the appropriate media type in the printer driver or in the machine’s Paper Type menu setting. (See Basic tab in the Software User’s Guide on the CD-ROM and Setting the Paper Type on page 2-4 in the User’s Guide.) The problem may disappear by itself. Try printing multiple pages to clear this problem, especially if the machine has not been used for a long time. You may clear the problem by wiping the scanner window with a soft cloth. (See Cleaning the laser scanner window on page 11-23.) The drum unit may be damaged. Put in a new drum unit. (See Replacing the drum unit (DR-2000) on page 11-28.) Lines across the page Clean the inside of the machine and the primary corona wire in the drum unit. (See Cleaning the corona wire on page 11-24.) You may clear the problem by wiping the scanner window with a soft cloth. (See Cleaning the laser scanner window on page 11-23.) The drum unit may be damaged. Put in a new drum unit. (See Replacing the drum unit (DR-2000) on page 11-28.) Black lines down the page Printed pages have toner stains down the page. Clean the primary corona wire of the drum unit. (See Cleaning the laser scanner window on page 11-23.) Make sure the primary corona wire’s blue tab is at the home position ( ▲). The drum unit may be damaged. Install a new drum unit. (See Replacing the drum unit (DR-2000) on page 11-28.) The toner cartridge may be damaged. Put in a new toner cartridge. (See Replacing the toner cartridge TN-2000 on page 11-25.) Make sure that a torn piece of paper is not inside the machine covering the laser scanner window. The fixing unit may be smudged. Call Brother or your dealer for service. White lines down the page You may clear the problem by wiping the scanner window with a soft cloth. (See Cleaning the laser scanner window on page 11-23.) The toner cartridge may be damaged. Put in a new toner cartridge. (See Replacing the toner cartridge TN-2000 on page 11-25.) 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 slot, see To load paper or other media in the manual feed slot on page 1-12. The paper tray may be too full. Check the paper type and quality. (See About paper on page 1-9.) Examples of poor print qualityRecommendation 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 A BCDEFG H ab cdefg hijk ABCD abcde 01234
Chapter 11 11 - 19 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 machine very often, the paper may have been in the paper tray too long. Turn over the stack of paper in the paper tray. Also, fan the paper stack and then rotate the paper 180° in the paper tray. Wrinkles or creases Make sure that paper is loaded properly. Check the paper type and quality. (See About paper on page 1-9.) Turn over the stack of paper in the tray or rotate the paper 180° in the input tray. Examples of poor print qualityRecommendation B DEFGH abc efghijk ACD bcde134
Troubleshooting and routine maintenance11 - 20 11 Compatibility If you are having difficulty sending or receiving a fax due to possible interference on the phone line, we recommend that you adjust the Equalization for compatibility to reduce the modem speed for fax operations. 1Press Menu/Set , 2, 0, 1. 2Press ▲ or ▼ to select Basic or Normal (or High*) (*MFC-7820N only). Press Menu/Set . 3Press Stop/Exit . Note ■Basic reduces the modem speed to 9600 bps. Unless interference is a recurring problem on your phone line, you may prefer to use it only when needed. ■ Normal sets the modem speed at 14400 bps. ■ High sets the modem speed at 33600 bps (MFC-7820N only). ■When you change the Compatibility to Basic, the ECM feature is not available. Packing and shipping the machine When you transport the machine, use the packing materials that came with your machine. If you do not pack the machine properly, you could void your warranty. 1Turn off the machine’s power switch. 2Unplug the machine from the telephone wall socket. 3Unplug all the cables and AC power cord from the machine. 4Open the front cover. 5Remove the drum unit and toner cartridge assembly. Leave the toner cartridge installed in the drum unit. 6Place the drum unit and toner cartridge assembly into the plastic bag and seal the bag. 7Close the front cover. 8Wrap the machine in the plastic bag and place it in the original carton with the original packing material. Miscellaneous 1.Compatibility
Chapter 11 11 - 21 9Pack the drum unit and toner cartridge assembly, AC power cord and printed materials in the original carton as shown below: 0Close the carton and tape it shut. Routine maintenance Cleaning the outside of the machine Clean the outside of the machine as follows: 1Pull the paper tray completely out of the machine. CAUTION The drum unit contains toner, so handle it carefully. If toner scatters and your hands or cloths get dirty, immediately wipe or wash it off with cold water. CAUTION ■Use neutral detergents. Cleaning with volatile liquids such as thinner or benzine will damage the outside surface of the machine. ■Do not use cleaning materials that contain ammonia. ■Do not use isopropyl alcohol to remove dirt from the control panel. It may crack the panel.
Troubleshooting and routine maintenance11 - 22 11 2Wipe the outside of the machine with a soft cloth to remove dust. 3Remove any paper that is in the paper tray. 4Wipe the inside and the outside of the paper tray with a soft cloth to remove dust. 5Re-load the paper and put the paper tray firmly back in the machine. Cleaning the scanner glass Turn off the machine’s power switch and lift the document cover. Clean the scanner glass and the white plastic surface underneath the document cover with isopropyl alcohol on a soft lint-free cloth. In the ADF unit, clean the white plastic bar and the scanner glass strip under it with isopropyl alcohol on a lint-free cloth. Document Cover White Plastic Surface Glass Strip White Plastic Bar
Chapter 11 11 - 23 Cleaning the laser scanner window 1Before you clean the inside of the machine, turn off the machine’s power switch. Unplug the telephone line cord first, and then unplug the power cord from the electrical socket. 2Open the front cover and pull out the drum unit and toner cartridge assembly. 3Gently clean the laser scanner window by wiping it with a clean soft dry lint-free cloth. Do not use isopropyl alcohol. CAUTION ■Do not use isopropyl alcohol to clean the laser scanner window. ■Do not touch the laser scanner window with your fingers. WARNING Just after you have used the machine, some internal parts of the machine are extremely HOT! When you open the front cover of the machine, never touch the shaded parts shown in the diagram below. CAUTION To prevent damage to the machine from static electricity, do not touch the electrodes shown below. Laser Scanner Window
Troubleshooting and routine maintenance11 - 24 11 4Put the drum unit and toner cartridge assembly back into the machine. 5Close the front cover. 6Plug the machine’s power cord back into the electrical socket first, and then plug in the telephone line cord. Turn on the machine’s power switch. Cleaning the corona wire We recommend placing the drum unit and toner cartridge assembly on a cloth or large disposable paper to avoid spilling and scattering toner. 1Open the front cover and pull out the drum unit and toner cartridge assembly. 2Clean the primary corona wire inside the drum unit by gently sliding the blue tab from right to left several times. 3Return the blue tab and snap it into the Home position ( ▼). 4Reinstall the drum unit and toner cartridge assembly in the machine. 5Close the front cover. CAUTION If you do not return the blue tab to the Home position ( ▼), your printed pages may have vertical black stripes on them.
Chapter 11 11 - 25 Replacing the toner cartridge TN-2000 The toner cartridge can print up to 2,500 pages. When the toner cartridge is running low, the LCD shows Toner Low. Actual page count will vary depending on your average type of document (i.e., standard letter, detailed graphics). Note It is a good idea to keep a new toner cartridge ready for use when you see the Toner Low warning. Discard the used toner cartridge according to local regulations, keeping it separate from domestic waste. You can also check our ecology website www.brothergreen.co.uk for recycling information. 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 machine and drum unit when you replace the toner cartridge. (See Cleaning the laser scanner window on page 11-23 and Cleaning the corona wire on page 11-24.) How to replace the toner cartridge 1Open the front cover and pull out the drum unit and toner cartridge assembly. WARNING Just after you use the machine, some internal parts of the machine will be extremely HOT! Never touch the shaded parts shown in the illustration. CAUTION To prevent damage to the machine from static electricity, do not touch the electrodes shown below.