Table Of Contents - Brother HL-1020 Service Manual

CHAPTER I FEATURES AND SPECIFICATIONS ..........................................I-1
1. FEATURES .........................................................................................................................I-1
2. SPECIFICATIONS ..............................................................................................................I-3
2.1 Printing.......................................................................................................................................I-3
2.2 Functions ...................................................................................................................................I-3
2.3 Electrical and Mechanical ..........................................................................................................I-4
2.4 Paper Specification ....................................................................................................................I-5
2.5 Print Delivery..............................................................................................................................I-5
2.6 Paper .........................................................................................................................................I-6
2.7 Effective Printing Area ...............................................................................................................I-7
3. SAFETY INFORMATION ....................................................................................................I-9
3.1 Laser Safety (110 - 120V Model only) .......................................................................................I-9
3.2 FDA Regulations (110 - 120V Model only) ................................................................................I-9
3.3 Caution for Laser Product........................................................................................................I-10
CHAPTER II THEORY OF OPERATION ........................................................ II-1
1. ELECTRONICS..................................................................................................................II-1
1.1 General Block Diagram.............................................................................................................II-1
1.2 Main PCB Block Diagram .........................................................................................................II-4
1.3 Main PCB..................................................................................................................................II-7
1.3.1 CPU Core ....................................................................................................................II-7
1.3.2 ASIC ............................................................................................................................II-9
1.3.3 ROM ..........................................................................................................................II-15
1.3.4 DRAM ........................................................................................................................II-16
1.3.5 Optional RAM ............................................................................................................II-17
1.3.6 Optional Serial I/O .....................................................................................................II-18
1.3.7 EEPROM ...................................................................................................................II-18
1.3.8 Reset Circuit ..............................................................................................................II-19
1.3.9 CDCC I/O .................................................................................................................. II-19
1.3.10 Engine I/O..................................................................................................................II-21
1.3.11 Paper Feed Motor Drive Circuit .................................................................................II-23
1.4 Panel Sensor PCB ..................................................................................................................II-24
1.5 Power Supply..........................................................................................................................II-24
1.5.1 Low-voltage Power Supply ........................................................................................II-24
1.5.2 High-voltage Power Supply, SR PCB........................................................................II-25
2. MECHANICS....................................................................................................................II-26
2.1 Overview of Printing Mechanism ............................................................................................II-26
2.2 Paper Transfer........................................................................................................................II-27
2.2.1 Paper Supply .............................................................................................................II-27
2.2.2 Paper Registration.....................................................................................................II-27
2.2.3 Paper Eject ................................................................................................................II-28
CONTENTS
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