Brother 1240, HL-1030, 1250 service manual Disassembly Procedure, AC Cord

Page 73

CHAPTER 4 DISASSEMBLY AND RE-ASSEMBLY

3.DISASSEMBLY PROCEDURE

3.1AC Cord

(1)Disconnect the AC cord from the printer AC inlet.

Printer

AC cord

Fig. 4-1

3.2Drum Unit

(1)Open the front cover and remove the drum unit from the printer.

Drum unit

Fig. 4-2

4-3

Image 73

Contents SM-PRN001 Model HL-1030/1240/1250/1270NPage Preface Table of Contents Theory of Operation Disassembly and RE-ASSEMBLY Troubleshooting Periodic MaintenanceIndex Manufacturedc ManufacturedkFor Finland and Sweden IEC 825 220-240V Model onlyAchtung Safety InformationDefinitions of WARNINGS, Cautions and Notes High Resolution and Fast Print Speed FeaturesQuick Print Setup Versatile Paper HandlingEnvironment-Friendly Enhanced Memory ManagementBar Code Print for HL-1250/1270N only Network Feature for HL-1270N onlyIsbn UPC-A UPC-E EAN-8 Front View OverviewRear View HL-1030/1240 HL-1250/1270NPrinting SpecificationsDIB CPU FunctionsElectrical and Mechanical Paper Network for HL-1270N onlyFeedable paper General Print delivery Paper cassette capacityPrinting Area Print guaranteed areaEffective printing area Monarch COM10Power Supply Conditions Required for InstallationEnvironment Unpacking For Windows Users Install the PrinterInstallation and Basic Operation For Windows Users with No CD-ROM Drive Install the drum unitLoad paper Print a testConnect the printer and the computer Install the printer driver from floppy diskInstall the USB driver Using the USB Interface for Windows 98 onlyConnect the USB interface cable Installation and Basic Operation Set the PC printer port For Macintosh iMac and Power Macintosh with USB Users OnlyLoad Paper into the Paper Cassette Paper HandlingLoad Paper Manually To print on both sides of the paper from the paper cassette Two Side Printing Manual DuplexingInstallation and Basic Operation Control Panel Operation AlarmDrum Ready DataData Toner LED Indications Alarm LED IndicationsDrum LED Indications Sleep mode Other Control FeaturesControl Panel Button Operations Operation DescriptionTest print mode Preparing the BR-net Board Network Board Operation for HL-1270N onlyConnect the Ethernet cable Factory default setting Print configurationLED functions LED green Link activityElectronics General Block DiagramRAM 4MB HL-1250HL-1270N Shows a general block diagram of the HL-1270N printerMain PCB Block Diagram USB I/O CPU Core Reset Circuit Asic HL-1030/1240 Main PCBHL-1250/1270N Theory of Operation 2 ROM HL-1030/1240 Two 32 Mbits ROMs x 16 bit are fitted Dram HL-1030/1240 Flash ROM for HL-1270N onlyTwo 16M-bit DRAMs x 16 bits are used as the RAM Optional RAM HL-1250/1270N PCI bus HL-1270N Optional serial I/O HL-1250Eeprom HL-1030/1240 Reset circuit HL-1030/1240Engine I/O HL-1030/1240 BR-net PCB for HL-1270N only Engine PCBLow-voltage power supply GND High-voltage power supplyOverview of Printing Mechanism MechanicsPCB Paper supply Paper TransferPaper registration Paper eject SensorsCover sensors a and B Toner Cartridge Drum UnitCharging Print ProcessExposure stage Developing Fixing stage TransferTAPTITE, CUP S Safety PrecautionsScrew PCBs Disassembly FlowAC Cord Disassembly ProcedurePaper Cassette Taptite, Torx pan M3x8 Disassembly and RE-ASSEMBLY Side guide L Side guide R Paper cassette Paper cassette Release lever extension spring Lock lever ➀ ➁ Network Board for HL-1270N only Front Cover Top Cover Main Cover Tray extension flap Main cover Laser Unit Drive Unit Main motor Assy Grease Molykote PG-662 1 rice-grain size Fixing Unit Fixing unit Main frame Concavity Remove the fixing unit cover from the fixing unit frame Halogen lamp Taptite, pan M3x10 Heat roller bearing Washer Heat roller gear Heat roller gear Heat roller bearing Embossment Heat roller cleaner Fixing unit frame Cleaner spring Hooks Thermistor Fixing unit frame Taptite, cup M3x12 Fixing unit frame First eject roller Idle gear PR2000057 26B Base Plate Ground wire Plastic chute Slit Main frame Lower Tray Relay PCB Assy for HL-1250/1270N only Main PCB AssyLow-Voltage Power Supply PCB Assy 30A PCB Assy Engine PCB Assy / High-Voltage Power Supply PCB AssyToner sensor light Solenoid Assy Panel PCB AssyClutch lever spring For paper feed roller Step Cassette guide L/F Taptite, cup M3x6 Fan Motor Assy Toner Sensor PCB Assy Light Reception Toner Sensor PCB Assy Light EmissionPaper Pick-up Roller Assy Paper Feed Roller Assy 70a Outer ChutePacking Consumable Parts Replacement ProcedureToner Cartridge Periodic Maintenance Assy Periodical Replacement PartsCleaning the Printer Exterior Periodical CleaningCleaning the Drum Unit Clean the Electrical Terminals Cleaning the Scanner WindowMtbf / Mttr Periodic Maintenance Initial Check IntroductionTroubleshooting Printer does not print Printed page has a problem Identify the ProblemService Calls Operator Calls & Service CallsLED Indication Error Remedy Operator CallsHow the LEDs indicate an error See ‘M-11 Service B’Error Messages in the Status Monitor Error MessagesError Message Remedy NV-RAM Error RAM ErrorMain Motor Error ErrorError Message Printouts Paper Loading Problems Paper ProblemsProblem Remedy Clearing jammed paper Paper JamsCauses & countermeasures Problem Type of Jam Cause RemedyDouble feeding Paper Feeding ProblemsWrinkles or creases User CheckCurl or Wave SkewSubsection 10.1 ‘Test Print Software Setting ProblemsUnable to print from application software under DOS HL-1240/1250/1270N only Value or alphabet following ‘BR’ is a product ID No DC power supplied No AC power suppliedMalfunctions PCBNo paper supplied Main motor does not rotateFixing heater temperature failure Insufficient output from high-voltage power supply unitBD failure Fuser failure Scanner failurePCB 24V DC? Engine interface error ROM error / D-RAM error / NV-RAM errorPCI BUS error HL-1270N only Image Defect Examples Image DefectsLight Troubleshooting Image DefectDark Completely blank All black Dirt on the back of paper How to clean the pressure rollerBlack and blurred vertical streaks Black vertical streaks in a gray background Black and blurred horizontal stripesWhite horizontal stripes White vertical streaksPoor fixing Faulty registrationFaint print Image distortionWhite spots Photosensitive drum Black band Black spotsHollow print Gray backgroundHorizontal lines Downward fogging of solid blackGhost Light rainToner specks Drum unit Location of Grounding ContactsPrinter body & Paper cassette Printer prints unexpectedly or it prints garbage Incorrect PrintoutFor HL-1250/1270N only User Check For DOS environment only User Check For connecting by RS-232C/422A on HL-1250 onlyInstallation Problem Network Problem for HL-1270N onlyIntermittent Problem Unix Troubleshooting TCP/IP TroubleshootingWindows 95/98 Peer to Peer Print LPR Troubleshooting Windows NT/LAN Server TCP/IP TroubleshootingInternet Print TCP/IP Troubleshooting AppleTalk Troubleshooting Novell Netware TroubleshootingApple TCP/IP Printing System 8.6 or later Web Browser Troubleshooting TCP/IPTest Print Mode Inspection ModeType of mode Function For the demo printerType of inspection Inspection ModeAlarm Factory inspection modeDrum ReadyTroubleshooting Troubleshooting Biuk Appendix 1. Serial NO. Descriptions0 0 1 0 Appendix 2. Diameter / Circumference of Rollers Media type setting All models Appendix 3. Print Speeds with Various SettingsMedia type setting HL-1240 demo model Print Configuration for HL-1240/1250/1270N only Appendix 4. HOW to Know Drum Unit Life & page CounterFig. A-2 Test Print for HL-1030 onlyHow to calculate drum unit life How to Read the Drum Unit LifeHow to Read the Page Counter Fig. A-4 How to Read the Maintenance InformationFig. A-7 Troubleshooting for Printer won’t print Appendix 5. HOW to USE the SELF-DIAGNOSTICS ToolsFig. A-10 DiagnosticsIf you click the OK button in , the dialog box below appears Fig. A-13 Printer InformationItems Descriptions Appendix 6. Nvram Default ValueFig. a Appendix 7. Paper Cassette Information for Europe onlyAppendix 8. Connection Diagram, HL-1030/1240 Appendix 9. Connection Diagram, HL-1250 Appendix 10. Connection Diagram, HL-1270N Appendix 11. Main PCB Circuit Diagram, HL-1030/1240 1/2 Appendix 12. Main PCB Circuit Diagram, HL-1030/1240 2/2 Appendix 13. Main PCB Circuit Diagram, HL-1250/1270N 1/5 Appendix 14. Main PCB Circuit Diagram, HL-1250/1270N 2/5 Appendix 15. Main PCB Circuit Diagram, HL-1250/1270N 3/5 Appendix 16. Main PCB Circuit Diagram, HL-1250/1270N 4/5 Appendix 17. Main PCB Circuit Diagram, HL-1250/1270N 5/5 Appendix 18A. Engine PCB Circuit Diagram OLD Appendix 18B. Engine PCB Circuit Diagram NEW Appendix 19. Network Board Circuit Diagram, HL-1270N Low-voltage PS Circuit 110 Low-voltage PS Circuit 220 High-voltage PS Circuit CN1 CN2 DEV1 Electrode helical spring / Chute High-voltage power supply PCB / Engine PCBIndex Electrical terminal 22,4-30 2-10, 4-4, A-16 1-4 Index PL-PRN001 Parts Reference ListB48K056 201A REF.NO Code ’TY Description Symbol RemarkContents Main Motor Assy REF.NO Code QTY Description Symbol RemarkTAPTITE, CUP S M3X6 Solenoid AssyFrame / Drive Unit Bearing JointConductor Bearing Paper Feeder Cleaner Spring Cleaner Roller AssyREF.NO Code QTY Description Remark Fixing UNIT, 115V SPFixing Unit Paper Tray ASSY, LGL SP Paper IndicatorPressure Plate ASSY, LGL Pressure Plate SpringPressure Roller Holder Paper Tray Assy 3 SPPaper Tray ASSY, LEG SP Paper Cassette TOP Cover Rear Cover10 UL9142001 1 Second Eject Roller Assy Model PlateCovers Main PCB ASSY, HL-1240 SP Main PCB ASSY, HL-1030 SPMain PCB ASSY, HL-1240 HEB SP Main PCB ASSY, HL-1240 PB SPHL-1030 HL-1240 HL-1250 HL-1270/1270N Engine PCB Assy A, 1250 SP Engine PCB Assy A, 1240 SPLOW-VOLTAGE PS ASSY, 115V SP LJ8330001 1 Protection TubeEngine PCB AC Cord ASSY, SAA AC CORD, UL/CSAAC Cord ASSY, SEV AC CORD, ChliHigh Voltage Power Supply PCB Setup GUIDE, GER Setup GUIDE, FRASetup GUIDE, NL Setup GUIDE, NORAccessories CARTON, HL-1030 EU Accessory CartonCARTON, HL-1030 can CARTON, HL-1240 USPacking Materials Torx Screw Driver Tool no Tool Name RemarkMolykote PG-662 ADD

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