Brother 7840 W User Guide
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Troubleshooting and routine maintenance91 B Menu access difficulties DifficultiesSuggestions The machine beeps when you try to access the Setup Receive and Setup Send menus. If the Fax key is not illuminated, press it to turn on Fax mode. The Setup Receive setting ( Menu, 2, 1) and Setup Send setting (Menu , 2, 2) are available only when the machine is in Fax mode. Copy quality difficulties DifficultiesSuggestions Vertical black line appears in copies. Black vertical lines on copies are typically caused by dirt or correction fluid on the glass strip, or the corona wire for printing is dirty. (See Cleaning the scanner glass on page 115 and Cleaning the corona wire on page 118.) Printing difficulties DifficultiesSuggestions No printout. „Check that the machine is plugged in and the power switch is turned on. „ Check that the toner cartridge and drum unit are installed correctly. (See Replacing the drum unit on page 125.) „ Check the interface cable connection on both the machine and your computer. (See the Quick Setup Guide .) „ Check that the correct printer driver has been installed and chosen. „ Check to see if the LCD is showing an error message. (See Error and maintenance messages on page 103.) „ Check the machine is online: (For Windows Vista ®) Click the Start button, Control Panel , Hardware and Sound , and then Printers . Right-click Brother MFC-XXXX Printer . Make sure that Use Printer Offline is unchecked. (For Windows ® XP and Windows Server® 2003) Click the Start button and choose Printers and Faxes . Right-click Brother MFC-XXXX Printer . Make sure that Use Printer Offline is unchecked. (For Windows ® 2000) Click the Start button and choose Settings and then Printers . Right-click Brother MFC-XXXX Printer . Make sure that Use Printer Offline is unchecked. The machine prints unexpectedly or it prints garbage. „ Pull out the paper tray and wait until the machine stops printing. Then turn off the machine and disconnect from the power for several minutes. (The MFC- 7840W can be turned off for up to 4 days without losing faxes stored in the memory.) „ Check the settings in your application to make sure it is set up to work with your machine. The machine prints the first couple of pages correctly, then some pages have text missing. „ Check the settings in your application to make sure that it is set up to work with your machine. „ Your computer is not recognising the ma chine’s input buffer’s full signal. Make sure that you connected the in terface cable correctly. (See the Quick Setup Guide .)
92 The headers or footers appear when the document displays on the screen but they do not show up when it is printed.There is an unprintable area on the top and bottom of the page. Adjust the top and bottom margins in your document to allow for this. Scanning difficulties DifficultiesSuggestions TWAIN errors appear while scanning. Make sure that the Brother TWAIN driver is chosen as the primary source. In PaperPort™ 11SE, click File, Scan or Get Photo and choose the Brother TWAIN driver . OCR does not work. Try increasing the scanning resolution. Network scanning does not work. (MFC-7440N and MFC-7840W only) See Network difficulties (MFC-7440N and MFC-7840W only) on page 93. Software difficulties DifficultiesSuggestions Cannot install software or print. Run the Repair MFL-Pro Suite program on the CD-ROM. This program will repair and reinstall the software. Cannot perform ‘2 in 1’ or ‘4 in 1’ printing. Check that the paper size setting in the appl ication and in the printer driver are the same. The machine does not print from Adobe Illustrator. Try to reduce the print resolution. (See Advanced tab in the Software User’s Guide on the CD-ROM.) Paper handling difficulties DifficultiesSuggestions The machine does not load paper. The LCD shows No Paper or a Paper Jam message. „ If there is no paper, load a new stack of paper into the paper tray. „ If there is paper in the paper tray, make sure it is straight. If the paper is curled, you should straighten it. Sometimes it is helpful to remove the paper, turn the stack over and put it back into the paper tray. „ Reduce the amount of paper in the paper tray, and then try again. „ If the LCD shows Paper Jam message and you still have a problem, see Paper jams on page 110. How do I print on envelopes? You can l oad envelopes from the manual feed slot. Your application must be set up to print the envelope size you are usi ng. This is usually done in the Page Setup or Document Setup menu of your application. (See your application’s manual for more information.) Which paper can I use? You can use plain paper, recycled paper, transpa rency and labels that are made for laser machines. (For details, see Acceptable paper and other print media on page 14.) There is a paper jam. (See Paper jams on page 110.) Printing difficulties (continued) DifficultiesSuggestions
Troubleshooting and routine maintenance93 B Print quality difficulties DifficultiesSuggestions Printed pages are curled. „Low quality thin or thick paper or not printing on the recommended side of the paper could cause this problem. Try turning over the stack of paper in the paper tray. „ Make sure that you choose the Paper Type that suits the print media type you are using. (See Acceptable paper and other print media on page 14.) Printed pages are smeared. The Paper Type setting may be in correct for the type of print media you are using, or the print media may be too thick or have a rough surface. (See Acceptable paper and other print media on page 14 and Basic tab in the Software User’s Guide on the CD-ROM .) Printouts are too light. „If this problem occurs when making copies or printing received faxes, set Toner Save mode to off in the machine menu settings. (See Toner Save on page 23.) „ Set Toner Save mode to off in the Advanced tab in the printer driver. (See Advanced tab in the Software User’s Guide on the CD-ROM .) Network difficulties (MFC-7440N and MFC-7840W only) DifficultiesSuggestions Cannot print over a wired Network. If you are having Network problems see the Network Users Guide on the CD- ROM for more information. Make sure your machine is powered on and is on-line and in Ready mode. Print the Network Configuration list to see your current Network settings. (See How to print a report on page 66.) Reconnect the LAN cable to the hub to verify that the cable and network connections are good. If possible, try connecting the machine to a different port on your hub using a diffe rent cable. If the connections are good, the lower LED of the back panel of the machine will be green.
94 The network scanning feature does not work. The network PC Fax Receive feature does not work. The network printing feature does not work.(For Windows® only) The firewall setting on your PC may be rejecting the necessary network connection. Follow t he instructions below to configure Windows ® Firewall. If you are using other personal firewall software, see the User’s Guide for your software or contact the software manufacturer. For Windows ® XP SP2 users: aClick the Start button, Control Panel , Network and Internet Connections and then Windows Firewall . Make sure that Windows Firewall on the General tab is set to On. bClick the Advanced tab and Settings... button of the Network Connection Settings . cClick the Add button. dTo add port 54925 for network scanning, enter the information below: 1. In Description of service : Enter any description, for example “Brother Scanner”. 2. In Name or IP address (for example 192.168.0.12) of the computer hosting this service on your network: Enter “Localhost”. 3. In External Port number for this service : Enter “54925” 4. In Internal Port number for this service : Enter “54925”. 5. Make sure UDP is chosen. 6. Click OK. eClick the Add button. fTo add port 54926 for network PC Fax, enter the information below: 1. In Description of service : Enter any description, for example “Brother PC Fax”. 2. In Name or IP address (for example 192.168.0.12) of the computer hosting this service on your network: Enter “Localhost”. 3. In External Port number for this service : Enter “54926”. 4. In Internal Port number for this service : Enter “54926” 5. Make sure UDP is chosen. 6. Click OK. gIf you still have trouble with your network connection, click the Add button. hTo add port 137 for network scanning, network printing and network PC Fax receiving, enter the information below: 1. In Description of service : - Enter any description, for example “Brother PC Fax receiving” 2. In Name or IP address (for example 192.168.0.12) of the computer hosting this service on your network: Enter “Localhost”. 3. In External Port number for this service : Enter “137”. 4. In Internal Port number for this service : Enter “137”. 5. Make sure UDP is chosen. 6. Click OK. iMake sure if the new setting is added and is checked, and then click OK. Network difficulties (MFC-7440N and MFC-7840W only) (continued) DifficultiesSuggestions
Troubleshooting and routine maintenance95 B The network scanning feature does not work. The network PC Fax Receive feature does not work. The network printing feature does not work. (continued)For Windows Vista® users: aClick the Start button, Control Panel , Network and Internet , Windows Firewall and click Change settings . bWhen the User Account Control screen appears, do the following. „ Users who have administrator rights: Click Continue. „ For users who do not have administrator rights: Enter the administrator password and click OK. cMake sure that Windows Firewall on the General tab is set to On. dClick the Exceptions tab. eClick the Add port... button. fTo add port 54925 for network scanning, enter the information below: 1. In Name : Enter any description. (for example “Brother Scanner”) 2. In Port number : Enter “54925”. 3. Make sure UDP is chosen. Then click OK. gClick the Add port... button. hTo add port 54926 for Network PC Fax, enter the information below: 1. In Name : Enter any description. (for example “Brother PC Fax”) 2. In Port number : Enter “54926”. 3. Make sure UDP is chosen. Then click OK. iMake sure that the new setting is added and is checked, and then click Apply . jIf you still have trouble with your network connection such as network scanning or printing, check File and Printer Sharing box in the Exceptions tab and then click Apply. Your computer cannot find your machine. For Windows ® users: The firewall setting on your PC may be rejecting the necessary network connection. For det ails, see the instruction above. For Macintosh ® users: Re-select your machine in the Device Selector application located in Macintosh HD/Library/Printers/Brother/Utilities/ DeviceSelector or from the Model pop-up menu of ControlCenter2. Network difficulties (MFC-7440N and MFC-7840W only) (continued) DifficultiesSuggestions
96 Improving the print qualityB Examples of poor print qualityRecommendation 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 Acceptable paper and other print media on page 14.) „ Make sure that you choose the appropriate media type in the printer driver or in the machine’s Paper Type menu setting. (See Acceptable paper and other print media on page 14 and Basic tab in the Software User’s Guide on the CD-ROM .) „ The problem may disappear by itself. Print multiple pages to clear this problem, especially if the machine 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 125.) White lines down the page „ Wipe the laser scanner windows with a soft cloth. (See Cleaning the laser scanner window on page 116.) „ Make sure that a torn sheet of paper is not inside the machine covering the scanner window. „ The toner cartridge may be damaged. Put in a new toner cartridge. (See Replacing a toner cartridge on page 122.) „ The drum unit may be damaged. Put in a new drum unit. (See Replacing the drum unit on page 125.) Hollow print „ Make sure that you use paper that meets our specifications. (See Acceptable paper and other print media on page 14.) „ Choose Thick paper mode in the printer driver, choose Thick in the machine’s Paper Type menu setting or use thinner paper than you are currently using. (See Paper type on page 21 and Basic tab in the Software User’s Guide on the CD-ROM .) „ Check the machine’s environment. Conditions such as high humidity can cause hollow print. (See Choosing a location on page 80.) „ The drum unit may be damaged. Put in a new drum unit. (See Replacing the drum unit on page 125.) Grey background „ Make sure that you use paper that meets our specifications. (See Acceptable paper and other print media on page 14.) „ Check the machine’s environment. Conditions such as high temperatures and high humidit y can increase the amount of background shading. (See Choosing a location on page 80.) „ The toner cartridge may be damaged. Put in a new toner cartridge. (See Replacing a toner cartridge on page 122.) „ The drum unit may be damaged. Put in a new drum unit. (See Replacing the drum unit on page 125.) ABCDEFGH abcdefghijk ABCD abcde 01234 ABCDEFGH abcdefghijk ABCD abcde 01234 ABCDEFGH abcdefghijk ABCD abcde 01234
Troubleshooting and routine maintenance97 B Page skewed„ Make sure that the paper or other print media is loaded correctly in the paper tray and that the guides are not too tight or too loose against the paper stack. „ Set the paper guides correctly. (See Loading paper in the paper tray on page 9.) „ The paper tray may be too full. „ If you are using the manual feed slot, see Loading paper in the manual feed slot on page 10. „ Check the paper type and quality. (See Acceptable paper and other print media on page 14.) Ghost „ Make sure that you use paper th at meets our specifications. Rough- surfaced paper or thick paper may cause the problem. (See Acceptable paper and other print media on page 14.) „ Make sure that you choose the corre ct media type in the printer driver or in the machine’s Paper Type menu setting. (See Acceptable paper and other print media on page 14 and Basic tab in the Software User’s Guide on the CD-ROM .) „ The drum unit may be damaged. Put in a new drum unit. (See Replacing the drum unit on page 125.) „ The fuser unit may be contaminated. Call your Brother dealer for service. Wrinkles or creases „ Check the paper type and quality. (See Acceptable paper and other print media on page 14.) „ Make sure that paper is loaded correctly. (See Loading paper in the paper tray on page 9.) „ Turn over the stack of paper in the tr ay or rotate the paper 180° in the input tray. Poor fixing „ Choose Improve Toner Fixing mode in the printer driver. (See Device Options (For Windows ®) or Print Settings (For Macintosh®) in the Software User’s Guide on the CD-ROM .) If you print only a few pages, change the printer driver setting in Media Type to a thin setting. Examples of poor print qualityRecommendation ABCDEFGH abcdefghijk ABCD abcde 01234 B DEFGH abc efghijk ACD bcde134 ABCDEFGH abcdefghijk ABCD abcde 01234
98 Curled or wavy„ Check the paper type and quality. High temperatures and high humidity will cause paper to curl. „ If you do not use the machine 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. White Spots on black text and graphics at 75 mm intervals Black Spots at 75 mm intervals „ Make ten copies of a blank, white sheet of paper. (See Making multiple copies on page 68.) If the problem is not solved, the drum unit may have glue from a labe l stuck on the OPC drum surface. Clean the drum unit. (See Cleaning the drum unit on page 120.) „ The drum unit may be damaged. Put in a new drum. (See Replacing the drum unit on page 125.) Examples of poor print qualityRecommendation 75 mm 75 mm 75 mm 75 mm
Troubleshooting and routine maintenance99 B 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 80.) „ If the whole page is too light, Toner Save mode may be on. Turn off Toner Save mode in the machine menu settings or Toner Save mode in the printer Properties of the driver. (See Toner Save on page 23 or Advanced tab in the Software User’s Guide on the CD- ROM .) „ Clean the scanner window and the co rona wire of the drum unit. (See Cleaning the laser scanner window on page 116 and Cleaning the corona wire on page 118.) „ The toner cartridge may be damaged. Put in a new toner cartridge. (See Replacing a toner cartridge on page 122.) „ The drum unit may be damaged. Put in a new drum unit. (See Replacing the drum unit on page 125.) Toner specks „ Make sure that you use paper th at meets our specifications. Rough- surfaced paper may cause the problem. (See Acceptable paper and other print media on page 14.) „ Clean the corona wire and the drum unit. (See Cleaning the corona wire on page 118 and Cleaning the drum unit on page 120.) „ The drum unit may be damaged. Put in a new drum unit. (See Replacing the drum unit on page 125.) „ The fuser unit may be contaminated. Call your Brother dealer for service. All black „ Clean the corona wire inside the drum unit by sliding the green tab. Be sure to return the green tab to the home position ( a). (See Cleaning the corona wire on page 118.) „ The drum unit may be damaged. Put in a new drum unit. (See Replacing the drum unit on page 125.) „ The fuser unit may be contaminated. Call your Brother dealer for service. Examples of poor print qualityRecommendation ABCDEFGH abcdefghijk ABCD abcde 01234 CDEF d efg BC b cd 23 ABCDEFGH abcdefghijk ABCD abcde 01234
100 Black toner marks across the page „ Make sure that you use paper that meets our specifications. (See Acceptable paper and other print media on page 14.) „ If you use label sheets for laser machines, the glue from the sheets may sometimes stick to the OPC drum surface. Clean the drum unit. (See Cleaning the drum unit on page 120.) „ 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 toner cartridge may be damaged. Put in a new toner cartridge. (See Replacing a toner cartridge on page 122.) „ The drum unit may be damaged. Put in a new drum unit. (See Replacing the drum unit on page 125.) Line across the page „ Clean the laser scanner window and the corona wire inside the drum unit. (See Cleaning the laser scanner window on page 116 and Cleaning the corona wire on page 118.) „ The drum unit may be damaged. Put in a new drum unit. (See Replacing the drum unit on page 125.) Black lines down the page Printed pages have toner stains down the page „ Clean the corona wire inside the drum unit by sliding the green tab. Be sure to return the green tab to the home position ( a). (See Cleaning the corona wire on page 118.) „ The toner cartridge may be damaged. Put in a new toner cartridge. (See Replacing a toner cartridge on page 122.) „ The drum unit may be damaged. Put in a new drum unit. (See Replacing the drum unit on page 125.) „ The fuser unit may be smudged. Call your Brother dealer for service. Examples of poor print qualityRecommendation ABCDEFGH abcdefghijk ABCD abcde 01234 ABCDEFGH abcdefghijk ABCD abcde 01234 ABCDEFGH abcdefghijk ABCD abcde 01234