Brother 1240, HL-1030, 1250 service manual CN1 CN2 DEV1

Page 211

Appendix 22B. High-voltage Power Supply PCB Circuit Diagram (NEW)

TRANSCH2

TRANSFB

 

2

 

D109

R125

R124

 

R123

TRANSCH1

TRANSFF

 

1

 

R92

R90

R81

R93

Q83

 

R82

 

 

 

 

 

 

 

 

 

CN1

 

CN2

DEV1

DEVCH

DEV2

 

0V

CHG

+24V

+24V

0V

4

5

8

 

6

3

7

2

1

 

 

 

 

 

 

R1

 

 

 

 

 

 

 

R2

 

 

 

R21

R35

 

 

 

 

R3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Q6

 

 

R22

 

R31

 

D1

R4

 

 

 

 

 

 

R8

 

 

 

Q102

R95 R94

Q82

 

 

R5

Q21

Q28

R6

 

 

R134

 

 

 

R127

R126 R105

R104

 

VR101

 

C101 R106

 

 

 

 

 

 

C108 R102

 

C102

R128

R129

R107

R114

 

 

 

 

 

D101

R115

C107

 

Q101

D103

R108

 

 

 

B101

 

 

 

C103

 

 

D81

 

R84

R83

 

 

 

 

 

 

 

 

 

R85

 

 

 

IC81

 

R86

C81

 

 

 

 

 

 

 

 

 

 

R101

C87

 

 

 

R88

 

 

R91

 

 

D85

R103

C83

C82

R87

 

 

 

 

 

 

 

 

 

D86

D84

 

R89

 

Q81

 

 

D83

 

 

 

 

Z51

VR51

C51

R51

R24

 

 

 

 

 

 

 

 

R9

R7

R11

 

 

R10

 

R23

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C2

 

R33

 

R32

 

 

 

 

 

 

 

Q3

 

 

 

 

R26

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R12

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C5

Q5

 

R13

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R27

 

 

 

 

 

 

 

 

 

 

Q2

 

 

 

 

 

 

 

 

 

C3

Q4

 

 

 

 

 

 

 

 

 

 

 

D2

+

 

 

 

C22

 

 

R25

 

 

 

 

R15

 

R14

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R16

D3

 

 

 

 

 

 

 

 

 

 

C4

 

 

R18

 

Q29

 

R34 VR21

 

 

 

 

 

D4

 

 

Q1

C1+

C21

R36

 

 

 

 

 

 

 

R17

 

 

PC21

 

 

 

 

 

 

 

 

 

 

C25

 

 

 

 

D5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R43

VR22

 

 

 

 

 

 

 

 

 

 

B1

 

Q22

 

 

R44

R45

R46

R47

R48

R49

 

 

 

 

 

 

 

D25

D24

 

 

 

 

 

 

DB2

 

 

DB1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R131

R130

 

Q103

R133

R132

R113

R112

 

C105

D104

C104

C106

R110 R109

 

 

B102

DB82

DB81

 

CB82

CB81

RB81

 

 

RB82

 

 

GRID

C26

Q27

 

Q24

 

 

 

RB1

 

 

 

CB2 CB1

 

 

 

 

D23

Q26

Q25

RB2

 

R50

 

 

CHG

 

C28

 

 

 

 

 

DEV

 

R121

D108

 

 

R120

R122

D110

NAME

High-voltage PS Circuit

A - 33

Page 210 Page 212
Image 211
Page 210 Page 212
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 Versatile Paper Handling FeaturesHigh Resolution and Fast Print Speed Quick Print SetupEnvironment-Friendly Enhanced Memory ManagementBar Code Print for HL-1250/1270N only Network Feature for HL-1270N onlyIsbn UPC-A UPC-E EAN-8 HL-1250/1270N OverviewFront View Rear View HL-1030/1240Printing 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 Print a test Install the drum unitFor Windows Users with No CD-ROM Drive Load paperConnect 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 Data AlarmControl Panel Operation Drum ReadyData Toner LED Indications Alarm LED IndicationsDrum LED Indications Operation Description Other Control FeaturesSleep mode Control Panel Button OperationsTest print mode Preparing the BR-net Board Network Board Operation for HL-1270N onlyConnect the Ethernet cable LED green Link activity Print configurationFactory default setting LED functionsElectronics 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 ProblemOperator Calls Operator Calls & Service CallsService Calls LED Indication Error RemedyHow the LEDs indicate an error See ‘M-11 Service B’Error Messages in the Status Monitor Error MessagesError Message Remedy Error RAM ErrorNV-RAM Error Main Motor ErrorError Message Printouts Paper Loading Problems Paper ProblemsProblem Remedy Clearing jammed paper Paper JamsCauses & countermeasures Problem Type of Jam Cause RemedyUser Check Paper Feeding ProblemsDouble feeding Wrinkles or creasesCurl 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 PCB No AC power suppliedNo DC power supplied MalfunctionsNo 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/IPFor the demo printer Inspection ModeTest Print Mode Type of mode FunctionType of inspection Inspection ModeReady Factory inspection modeAlarm DrumTroubleshooting 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 Solenoid Assy REF.NO Code QTY Description Symbol RemarkMain Motor Assy TAPTITE, CUP S M3X6Frame / Drive Unit Bearing JointConductor Bearing Paper Feeder Fixing UNIT, 115V SP Cleaner Roller AssyCleaner Spring REF.NO Code QTY Description RemarkFixing Unit Pressure Plate Spring Paper IndicatorPaper Tray ASSY, LGL SP Pressure Plate ASSY, LGLPressure Roller Holder Paper Tray Assy 3 SPPaper Tray ASSY, LEG SP Paper Cassette Model Plate Rear CoverTOP Cover 10 UL9142001 1 Second Eject Roller AssyCovers Main PCB ASSY, HL-1240 PB SP Main PCB ASSY, HL-1030 SPMain PCB ASSY, HL-1240 SP Main PCB ASSY, HL-1240 HEB SPHL-1030 HL-1240 HL-1250 HL-1270/1270N LJ8330001 1 Protection Tube Engine PCB Assy A, 1240 SPEngine PCB Assy A, 1250 SP LOW-VOLTAGE PS ASSY, 115V SPEngine PCB AC CORD, Chli AC CORD, UL/CSAAC Cord ASSY, SAA AC Cord ASSY, SEVHigh Voltage Power Supply PCB Setup GUIDE, NOR Setup GUIDE, FRASetup GUIDE, GER Setup GUIDE, NLAccessories CARTON, HL-1240 US Accessory CartonCARTON, HL-1030 EU CARTON, HL-1030 canPacking Materials Torx Screw Driver Tool no Tool Name RemarkMolykote PG-662 ADD
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