Brother Dcp 7020 User Manual
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Troubleshooting and routine maintenance6 - 11 6 Improving the print quality This section provides information on the following topics: Examples of poor print qualityRecommendation Faint Check the DCP’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, turn off Toner Save mode in the DCP menu settings or in the printer driver. (See Toner Save on page 2-2 or Advanced tab in the Software User’s Guide on the CD-ROM.) — OR — If your DCP is not connected to a computer, turn off Toner Save mode in the DCP itself. (See Toner Save on page 2-2.) Clean the laser scanner window and the primary corona wire on the drum unit. (See Cleaning the laser scanner window on page 6-17 and Cleaning the corona wire on page 6-19.) If the print quality has not improved, install a new drum unit. (See Replacing the drum unit (DR-350) on page 6-22.) Install a new toner cartridge. (See Replacing the toner cartridge (TN-350) on page 6-19.) Gray backgr ound Make sure that you use paper that meets the recommended specifications. (See About paper on page 1-8.) Check the DCP’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-350) on page 6-19.) Clean the primary corona wire on the drum unit. (See Cleaning the corona wire on page 6-19.) If the print quality has not improved, install a new drum unit. (See Replacing the drum unit (DR-350) on page 6-22.) Ghost Make sure you use paper that meets our specifications. Rough-surfaced paper or thick print media may cause this problem. Make sure that you choose the appropriate media type in the printer driver or in the DCP’s Paper Type menu setting. (See About paper on page 1-8 and Basic tab in the Software User’s Guide on the CD-ROM.) Install a new drum unit. (See Replacing the drum unit (DR-350) on page 6-22.) Toner specks Make sure that you use paper that meets our specifications. Rough-surfaced paper may cause the problem. (See About paper on page 1-8.) Clean the primary corona wire and the drum unit. (See Cleaning the corona wire on page 6-19 and See Cleaning the drum unit on page 6-12.) If the print quality has not improved, install a new drum unit. (See Replacing the drum unit (DR-350) on page 6-22.) Hollow print Make sure that you use paper that meets our specifications. (See About paper on page 1-8.) Choose Thick paper mode in the printer driver or in the DCP’s Paper Type menu setting, or use thinner paper than you are currently using. (See Basic tab in the Software User’s Guide on the CD-ROM.) Check the DCP’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 6-19.) If the print quality has not improved, install a new drum unit. (See Replacing the drum unit (DR-350) on page 6-22.) All black Clean the primary corona wire on the drum unit. (See Cleaning the corona wire on page 6-19.) If the print quality has not improved, install a new drum unit. (See Replacing the drum unit (DR-350) on page 6-22.) ABCDEFGH abcdefghijk ABCD abcde 01234 CDEF defgBC bcd23 ABCDEFGH abcdefghijk ABCD abcde 01234 ABCDEFGH abcdefghijk ABCD abcde 01234
Chapter 6 6 - 12 White Spots on black text and graphics at 3.1 in. (78.5 mm) intervals Black Spots at 3.1 in. (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 10 to 15 copies of a blank, white sheet of paper. (See Making multiple copies on page 3-1.) If you still see the spots on printed documents after making multiple copies, clean the drum unit as follows: 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. The OPC drum is photosensitive so do not touch it 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-350) on page 6-22.) Examples of poor print qualityRecommendation 3.1 in. (78.5 mm) 3.1 in. (78.5 mm) 3.1 in. (78.5 mm) 3.1 in. (78.5 mm) OPC drum surface
Troubleshooting and routine maintenance6 - 13 6 Black toner marks across the page Make sure that you use paper that meets our specifications. (See About paper on page 1-8.) 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 6-12.) 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-350) on page 6-22.) 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 1-8.) Make sure that you choose the appropriate media type in the printer driver or in the DCP’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 2-1 in this User’s Guide.) The problem may disappear by itself. Try printing multiple pages to clear this problem, especially if the DCP 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 (DR-350) on page 6-22.) Lines across the page Clean the inside of the DCP and the primary corona wire in the drum unit. (See Cleaning the corona wire on page 6-19.) The drum unit may be damaged. Put in a new drum unit. (See Replacing the drum unit (DR-350) on page 6-22.) Black lines down the page Printed pages have toner stains down the page. Clean the primary corona wire of the drum unit. (See Replacing the drum unit (DR-350) on page 6-22.) Make sure the primary corona wire is at the home position ( ▲). The drum unit may be damaged. Install a new drum unit. (See Replacing the drum unit (DR-350) on page 6-22.) The toner cartridge may be damaged. Put in a new toner cartridge. (See Replacing the toner cartridge (TN-350) on page 6-19.) Make sure that a torn piece of paper is not inside the DCP covering the laser scanner window. The fixing unit may be smudged. Call Brother Customer Service at 1-800-284-4329 ( in USA) or 1-877-BROTHER ( in Canada). White lines down the page You may clear the problem by wiping the laser scanner window with a soft cloth. (See Cleaning the laser scanner window on page 6-17.) The toner cartridge may be damaged. Put in a new toner cartridge. (See Replacing the toner cartridge (TN-350) on page 6-19.) 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 1-11. The paper tray may be too full. Check the paper type and quality. (See About paper on page 1-8.) 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 abcd efghijk ABCD abcde 01234
Chapter 6 6 - 14 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 DCP 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 1-8.) 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 maintenance6 - 15 6 Packing and shipping the DCP When you transport the DCP, use the packing materials that came with your DCP. If you do not pack the DCP properly, you could void your warranty. The DCP should be adequately insured with the carrier. 1Turn off the DCP’s power switch. 2Unplug the DCP from the AC power outlet. 3Unplug the cable from the DCP. 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 DCP in the plastic bag and place it in the original carton with the original packing material. 9Pack the drum unit and toner cartridge assembly, AC cord and printed materials in the original carton as shown below: Note If you are returning your DCP to Brother as part of the Exchange Service, pack only the DCP. Keep all separate parts and printed materials to use with your “Exchange” DCP. 0Close the carton and tape it shut.
Chapter 6 6 - 16 Routine maintenance Cleaning the outside of the DCP 1Pull the paper tray completely out of the DCP. 2Wipe the outside of the DCP with a soft cloth to remove dust. 3Remove anything that is stuck inside the paper tray. 4Wipe the inside of the paper tray with a soft cloth to remove dust. 5Re-load the paper and put the paper tray in the DCP. CAUTION 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. CAUTION ■Use neutral detergents. Cleaning with volatile liquids such as thinner or benzine will damage the outside surface of the DCP. ■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 maintenance6 - 17 6 Cleaning the scanner glass Turn off the DCP’s power switch and lift the document cover. Clean the scanner glass and white plastic 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. Cleaning the laser scanner window 1Before you clean the inside of the DCP, turn off the DCP’s power switch. 2Open the front cover and pull out the drum unit and toner cartridge assembly. Scanner GlassWhite Plastic Document Cover Glass Strip White Plastic Bar 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 DCP, some internal parts of the machine are extremely HOT! When you open the front cover of the DCP, never touch the shaded parts shown in the diagram below.
Chapter 6 6 - 18 3Gently clean the laser scanner window by wiping it with a clean soft, dry, lint-free cloth. Do not use isopropyl alcohol. 4Put the drum unit and toner cartridge assembly back into the DCP. 5Close the front cover. 6Turn on the DCP’s power switch. CAUTION To prevent damage to the DCP from static electricity, do not touch the electrodes shown below. Laser Scanner Window
Troubleshooting and routine maintenance6 - 19 6 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 DCP. 5Close the front cover. Replacing the toner cartridge (TN-350) 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. 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 DCP and drum unit when you replace the toner cartridge. (See Cleaning the laser scanner window on page 6-17 and Cleaning the corona wire on page 6-19.) CAUTION If you do not return the blue tab to the Home position ( ▼), your printed pages may have vertical black stripes on them.
Chapter 6 6 - 20 How to replace the toner cartridge 1Open the front cover and pull out the drum unit and toner cartridge assembly. 2Hold down the lock lever on the left and pull the toner cartridge out of the drum unit. 3Unpack the new toner cartridge. Place the used toner cartridge into the aluminum bag and discard it according to local regulations. WARNING Just after you use the DCP, 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 DCP from static electricity, do not touch the electrodes shown below. CAUTION ■Place the drum unit on a drop cloth or large piece of disposable paper to avoid spilling and scattering the toner. ■Handle the toner cartridge carefully. If toner scatters on your hands or clothes, immediately wipe it off or wash it with cold water.