Brother Mfc 8370dn User Manual
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120 Improving the print qualityC 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 153.) White lines down the page„Wipe the laser scanner windows with a dry, lint-free soft cloth. (See Cleaning the laser scanner window on page 144.) „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 150.) „The drum unit may be damaged. Put in a new drum unit. (See Replacing the drum unit on page 153.) 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 22 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 98.) „The drum unit may be damaged. Put in a new drum unit. (See Replacing the drum unit on page 153.) 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 humidity can increase the amount of background shading. (See Choosing a location on page 98.) „The toner cartridge may be damaged. Put in a new toner cartridge. (See Replacing a toner cartridge on page 150.) „The drum unit may be damaged. Put in a new drum unit. (See Replacing the drum unit on page 153.) ABCDEFGH abcdefghijk ABCD abcde 01234 ABCDEFGH abcdefghijk ABCD abcde 01234 ABCDEFGH abcdefghijk ABCD abcde 01234
Troubleshooting and routine maintenance 121 C 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 standard paper tray on page 10.) „If you are using the MP tray, see Loading paper in the multi-purpose tray (MP tray) on page 11. „The paper tray may be too full. „Check the paper type and quality. (See Acceptable paper and other print media on page 14.) Ghost„Make sure that you use paper that 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 correct 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 153.) „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 standard paper tray on page 10.) „Turn over the stack of paper in the paper tray or rotate the paper 180° in the paper tray. Examples of poor print qualityRecommendation ABCDEFGH abcdefghijk ABCD abcde 01234 B DEFGH abc efghijk ACD bcde 134
122 Envelope creases„Make sure that the envelope levers inside the back cover are pulled down when you print the envelopes. 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. Examples of poor print qualityRecommendation ABCDEFGEFGHIJKLMN
Troubleshooting and routine maintenance 123 C Curled„Turn the paper over in the paper tray, and print again. (excluding Letterhead paper) If the problem remains, slide the Anti-Curl Switch as follows: 1 Open the back cover. 2 With one hand, use the tab (1) to lift the roller assembly, then use your other hand to slide the Anti-Curl Switch (2) in the direction of the arrow. 3 Close the back cover. „Lift up the Output Tray Support Flap (1). „Choose Reduce Paper Curl mode in the printer driver. (See Other Print Options (For Windows®) or Print Settings (For Macintosh) in the Software Users Guide on the CD-ROM.) Examples of poor print qualityRecommendation 21 1
124 White Spots on black text and graphics at 94 mm intervals Black Spots at 94 mm intervals„Make ten copies of a blank, white sheet of paper. (See Making multiple copies on page 78.) If the problem is not solved, the drum unit may have glue from a label stuck on the OPC drum surface. Clean the drum unit. (See Cleaning the drum unit on page 146.) „The drum unit may be damaged. Put in a new drum. (See Replacing the drum unit on page 153.) 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 98.) „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 26 or Advanced tab in the Software User’s Guide on the CD- ROM.) „Clean the scanner window and the corona wire of the drum unit. (See Cleaning the laser scanner window on page 144 and Cleaning the corona wire on page 145.) „The toner cartridge may be damaged. Put in a new toner cartridge. (See Replacing a toner cartridge on page 150.) „The drum unit may be damaged. Put in a new drum unit. (See Replacing the drum unit on page 153.) Toner specks„Make sure that you use paper that 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 145 and Cleaning the drum unit on page 146.) „The drum unit may be damaged. Put in a new drum unit. (See Replacing the drum unit on page 153.) „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
Troubleshooting and routine maintenance 125 C All black„Clean the corona wire inside the drum unit by sliding the blue tab. Be sure to return the blue tab to the home position (a). (See Cleaning the corona wire on page 145.) „The drum unit may be damaged. Put in a new drum unit. (See Replacing the drum unit on page 153.) „The fuser unit may be contaminated. Call your Brother dealer for service. 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 146.) „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 150.) „The drum unit may be damaged. Put in a new drum unit. (See Replacing the drum unit on page 153.) 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 144 and Cleaning the corona wire on page 145.) „The drum unit may be damaged. Put in a new drum unit. (See Replacing the drum unit on page 153.) Black lines down the page Printed pages have toner stains down the page„Clean the corona wire inside the drum unit by sliding the blue tab. Be sure to return the blue tab to the home position (a). (See Cleaning the corona wire on page 145.) „The toner cartridge may be damaged. Put in a new toner cartridge. (See Replacing a toner cartridge on page 150.) „The drum unit may be damaged. Put in a new drum unit. (See Replacing the drum unit on page 153.) „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
126 Poor fixing„Open the back cover and make sure that the two blue levers on the left and right hand sides are in the up position. „Choose Improve Toner Fixing mode in the printer driver. (See Other Print Options (For Windows®) or Print Settings (For Macintosh) in the Software User’s Guide on the CD-ROM.) If this selection does not provide enough improvement, choose Thicker Paper in Media Type settings. Examples of poor print qualityRecommendation ABCDEFGH abcdefghijk ABCD abcde 01234
Troubleshooting and routine maintenance 127 C Setting Dial Tone detectionC When you send a fax automatically, by default your machine will wait for a fixed amount of time before it starts to dial the number. By changing the Dial Tone setting to Detection you can make your machine dial as soon as it detects a dial tone. This setting can save a small amount of time when sending a fax to many different numbers. If you change the setting and start having problems with dialling you should change back to the default No Detection setting. a Press Menu, 0, 5. bPress a or b to choose Detection or No Detection. Press OK. cPress Stop/Exit. Telephone line interferenceC If you are having difficulty sending or receiving a fax due to possible interference on the telephone line, we recommend that you adjust the Equalization for compatibility to reduce the modem speed for fax operations. aPress Menu, 2, 0, 1. bPress a or b to choose Basic(for VoIP), Normal or High. „Basic(for VoIP) cuts the modem speed to 9600 bps. and turns the error correction mode (ECM) off. For a standard telephone line: If you regularly experience interference on your standard telephone line try this setting. If you are using VoIP: VoIP service providers offer fax support using various standards. If you regularly experience fax transmission errors try this setting. „Normal sets the modem speed at 14400 bps. „High sets the modem speed at 33600 bps. Press OK. cPress Stop/Exit. Note When you change the Compatibility to Basic(for VoIP), the ECM feature is not available.
128 Error and maintenance messagesC As with any sophisticated office product, errors may occur and consumable items may need to be replaced. If this happens, your machine identifies the error or required routine maintenance and shows the appropriate message. The most common error and maintenance messages are shown below. You can clear most errors and perform routine maintenance messages by yourself. If you need more help, the Brother Solutions Center offers the latest FAQs and troubleshooting tips. Visit us at http://solutions.brother.com/ . Error MessageCauseAction 20 Sheet LimitThe ADF output tray has reached its maximum capacity.Do one of the following: „To send the pages scanned so far, press 1.Send. „To delete the scanned pages, press 2.Delete. If you send the pages already scanned and want to send the remaining pages, remove the scanned sheets from the ADF output tray, then dial the fax number (if you are sending a fax) and press Start. Access ErrorThe device is removed from the USB direct interface while the data is processing.Press Stop/Exit. Reinsert the device and try to print with Direct Print. BT Call Sign On (U.K. only)BT Call Sign is set to On. You cannot change the Receive Mode from Manual to another mode.Set BT Call Sign to Off. (See BT Call Sign (U.K. only) on page 54.) Cartridge ErrorThe toner cartridge is not installed correctly.Pull out the drum unit, take out the toner cartridge and put it back into the drum unit again. Comm.ErrorPoor telephone line quality caused a communication error.Try sending the fax again or try connecting the machine to another telephone line. If the problem continues, call the telephone company and ask them to check your telephone line. Connection FailYou tried to poll a fax machine that is not in Polled Waiting mode.Check the other fax machine’s polling setup.
Troubleshooting and routine maintenance 129 C Cooling Down Wait for a whileThe temperature of the drum unit or toner cartridge is too hot. The machine will pause its current print job and go into cooling down mode. During the cooling down mode, you will hear the cooling fan running while the LCD shows Cooling Down, and Wait for a while.Make sure that you can hear the fan in the machine spinning and that the exhaust outlet is not blocked by something. If the fan is spinning, remove any obstacles that surround the exhaust outlet, and then leave the machine turned on but do not use it for several minutes. If the fan is not spinning disconnect the machine from the power for several minutes, then reconnect it. (The machine can be turned off for up to 60 hours without losing faxes stored in the memory. See Transferring your faxes or Fax Journal report on page 133.) Cover is OpenThe front cover is not closed completely.Close the front cover of the machine. Cover is OpenThe fuser cover is not closed completely or paper was jammed in the back of the machine when you turned on the power.„Close the fuser cover of the machine. „Make sure paper is not jammed inside the back of the machine, and then close the fuser cover and press Start. Cover is OpenThe ADF cover is not closed completely.Close the ADF cover. The ADF is open while loading a document.Close the ADF cover of the machine and press Stop/Exit. DisconnectedThe other person or other person’s fax machine stopped the call.Try to send or receive again. Document JamThe document was not inserted or fed correctly, or the document scanned from the ADF was too long.See Document jams on page 134 or Using the automatic document feeder (ADF) on page 20. Drum ErrorThe corona wire on the drum unit needs to be cleaned.Clean the corona wire on the drum unit. (See Cleaning the corona wire on page 145.) The drum unit has reached the end of its life.Replace the drum unit. (See Replacing the drum unit on page 153.) Duplex DisabledThe duplex tray is not installed properly.Remove the duplex tray and install it again. Fuser ErrorThe temperature of fuser unit does not rise at a specified temperature within specified time.Turn the power switch off, wait a few seconds, and then turn it on again. Leave the machine for 15 minutes with the power on. The machine can be turned off for up to 60 hours without losing faxes stored in the memory. (See Transferring your faxes or Fax Journal report on page 133.) The fuser unit is too hot. Jam DuplexThe paper is jammed in the duplex tray.(See Paper jams on page 135.) Error MessageCauseAction