Brother HL-720 manual Printed pages are blurred at the center or either edge

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English: HL-YL User’s Guide, Chapter 6

USER’S GUIDE

Question

Printed pages are blurred at the center or either edge.

Fig. 6-14 Blurred Page

Ghost images show up on printed pages.

Fig. 6-15 Ghost Images

Recommendation

Certain environmental conditions such as humidity, high temperatures, etc. may cause this situation to occur.

∙Make sure that the printer is placed on a flat, horizontal surface.

∙Remove the drum unit with the toner cartridge installed. Try shaking them from side to side.

∙You may clear the problem by wiping the scanner windows with a soft cloth. (See “Cleaning the Printer Interior and Drum Unit.”)

If the same problem occurs after cleaning and Drum lamp is still on, replace the drum unit with a new one.

∙Turn the print density dial counterclockwise for lighter images. See “ADJUSTING THE PRINT DENSITY” in Chapter 5.

∙Make sure that you use paper that meets the specifications. Rough surface or thick media can cause the problem.

✒Note

The drum unit is a consumable, and it is necessary to replace it periodically.

6–14

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Contents Please read this manual thoroughly before using the printer Brother Laser PrinterShipment of the Printer Laser Printer HL-700 Series User’s Guide Trademarks Compilation and Publication NoticeDefinitions of Warnings, Cautions, and Notes To Use the Printer SafelyTable of Contents Maintenance Index-1Regulations Industry Canada Compliance Statement For Canada OnlyRadio Interference 220-240 V Model Only Declaration of Conformity For Europe Geräuschemission / Acoustic Noise Emission For Germany Only Important Wiring Information For U.K. only Finding Out How to Use the Printer About the GuidebooksAbout Your Printer Printer Overview Paper SupportDpi Resolution and 6 ppm Printing Speed FeaturesVersatile Paper Handling USER’S Guide Enhanced Memory Management Environment-Friendly Economy Printing ModeSleep Mode Power Save Mode Low Running CostOperating and Storage Environment Power SupplyEnvironment Introduction Blank Paper Type Paper SpecificationsPaper Size Fan the Paper Straighten the Paper Envelopes MULTI-PURPOSE Sheet Feeder Loading Paper into the Feeder Opening the Feeder Loading Paper or Envelopes in the FeederMoving the Paper Guide Closing the Feeder Two Side Printing Manual Duplexing When you load more than one sheet of paper manually When you load one sheet of paper manuallyManual Feed Slot Paper Handling Output Tray and Paper Support Wire Opening the Output Tray Extending the Extension Support WireLamps and Switch Ready Paper LampData Toner Lamp Alarm LampDrum Lamp Other Control Features SwitchTest Print Mode Lamp Lit Choice FunctionChapter Options Selecting the RS-422A Apple or RS-232C IBM Serial InterfaceSetting the Serial Interface Parameters Selecting the RS-422A Apple Or RS-232C IBM Serial InterfaceDTR only BitsBit OffConnecting the Serial Interface Cable NoneOptions Memory Board Chapter Maintenance Replacing the Toner CartridgeRemoving the Drum Unit Turning the Lever to Close the Shutter Removing the Old Toner Cartridge Installing the Toner Cartridge Into the Drum Unit Replacing the Drum Unit Drum Unit Nearly at the End of its Life10 Removing the Drum Unit ∙ Do not remove the starter sheet 12 Removing the Toner Cartridge15 Installing the Drum Unit Adjusting the Print Density 17 Adjusting the Print Density DialCleaning the Printer Cleaning the Printer ExteriorCleaning the Printer Interior and Drum Unit 20 Turning off the Switch and UnpluggingToner Sensor Electric Terminal Gears Scanner Window 23 Cleaning the Primary Corona Wire 24 Removing the Drum Unit Assembly RE-PACKING the Printer25 Placing the Drum Unit in the Plastic Bag Alarm Indications AT a Glance Operator CallsUSER’S Guide Troubleshooting Service Calls NV-RAMPaper Jams Locating Paper Jam PositionDo Not Pull the Jammed Paper from the Output Tray Paper Jam near the Drum Unit Question Setting Up the Printer HardwareSetting Up the Printer for Windows RecommendationSetting Up the Printer for DOS For HL-730 series Only Paper Handling Printing Print Quality White Stripes or Faint ImagesToner scatters and stains the printed Printed pages are blurred at the center or either edge Printer Specifications Appendix aFunctions Electrical and Mechanical Parallel Interface Specifications Fig. A-1 Parallel Interface Cable Resident Fonts For HL-730 series Only Symbol SETS/CHARACTER Sets For HL-730 series Only IBM mode Epson mode HP modeHP LaserJet IIP HP LaserJet IIP, Epson FX-850, IBM Propritner XL USER’S Guide Index Sleep mode Slide switch For USA & Canada Only UL6857001 a