Table Of Contents - Brother HL-600 Service Manual

CHAPTER I FEATURES AND SPECIFICATIONS
1 FEATURES .................................................................................................................... I-1
2 SPECIFICATIONS ............................................................................................................... I-2
2.1 Printing .................................................................................................................... I-2
2.2 Functions ................................................................................................................... I-2
2.3 Electrical and Mechanical .......................................................................................... I-2
2.4 Paper Specification .................................................................................................... I-4
2.5 Print Delivery ............................................................................................................. I-4
2.6 Paper .................................................................................................................... I-4
2.7 Effective Printing Area ............................................................................................... I-5
3 SAFETY INFORMATION .................................................................................................... I-7
3.1 Laser Safty (110 - 120V Model only) ......................................................................... I-7
3.2 CDRH Regulations (110 - 120V Model only) ............................................................. I-7
3.3 Caution for Laser Product .......................................................................................... I-8
CHAPTER II THEORY OF OPERATION
1 ELECTRONICS .................................................................................................................. II-1
1.1 General Block Diagram ............................................................................................. II-1
1.2 Main PCB Block Diagram ......................................................................................... II-2
1.3 Main PCB.................................................................................................................. II-3
1.3.1 CPU ............................................................................................................ II-3
1.3.2 ASIC ........................................................................................................... II-4
1.3.3 ROM ........................................................................................................... II-7
1.3.4 RAM ........................................................................................................... II-7
1.3.5 Optional RAMs ........................................................................................... II-8
1.3.6 Optional Serial I/O ...................................................................................... II-8
1.3.7 EFPROM .................................................................................................... II-9
1.3.8 Reset Circuit ............................................................................................... II-9
1.3.9 CDCC I/O ................................................................................................... II-9
1.3.10 Engine I/O ................................................................................................ II-10
1.4 Driver PCB .............................................................................................................. II-11
1.4.1 Paper Feed Motor Drive Circuit ................................................................ II-11
1.4.2 Solenoid (Pick-up,Clutch), Erase Lamp, Fan Motor Drive Circuit ............ II-11
1.4.3 Operation Panel ....................................................................................... II-12
1.4.4 Scanner Motor, Laser Sensors(Registration, Paper Eject, Toner),
Thermistor, High-voltage Power Supply ................................................... II-12
1.5 Power Supply .......................................................................................................... II-13
2 MECHANICS ................................................................................................................. II-14
2.1 Overview of printing mechanism ............................................................................. II-14
2.2 Paper Transfer ........................................................................................................ II-15
2.2.1 Paper Supply ............................................................................................ II-15
2.2.2 Paper Registration .................................................................................... II-15
2.2.3 Paper Eject ............................................................................................... II-16
2.3 Sensors ................................................................................................................. II-17
2.3.1 Multi Purpose Tray (MPT) Sensor ............................................................ II-17
2.3.2 Cover Sensor ........................................................................................... II-17
2.3.3 Toner Empty Sensor ................................................................................ II-17
2.4 Process Unit ........................................................................................................... II-18
2.4.1 Photosensitive Drum ................................................................................ II-18
2.4.2 Primary Charger ....................................................................................... II-18
2.4.3 Developer Roller ....................................................................................... II-18
2.4.4 Transfer Roller .......................................................................................... II-18
2.4.5 Cleaner Blade ........................................................................................... II-18
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