Brother International HL-1070 Service Manual - Page 4

Contents, I Features And Specifications, Ii Theory Of Operation - usb driver

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CONTENTS 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-6 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 (Warnhinweis für Laserdrucker 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-2 1.3 Main PCB ...II-3 1.3.1 CPU Core ...II-3 1.3.2 ASIC ...II-5 1.3.3 ROM ...II-7 1.3.4 Flash Memory ...II-7 1.3.5 DRAM ...II-8 1.3.6 Optional RAM ...II-9 1.3.7 Optional Serial I/O ...II-10 1.3.8 EEPROM ...II-10 1.3.9 Reset Circuit ...II-11 1.3.10 Parallel I/O ...II-11 1.3.11 Engine I/O...II-12 1.3.12 Paper Feed Motor Drive Circuit II-14 1.3.13 USB I/O...II-14 1.4 Driver PCB ...II-14 1.5 SW Panel PCB...II-14 1.6 Power Supply ...II-15 1.6.1 Low-voltage Power Supply II-15 1.6.2 High-voltage Power Supply, SR PCB II-16 2. MECHANICS...II-17 2.1 Overview of Printing Mechanism II-17 2.2 Paper Transfer ...II-18 2.2.1 Paper Supply ...II-18 i

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i
CONTENTS
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-6
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 (Warnhinweis für Laserdrucker)
.........................................................
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-2
1.3 Main PCB
......................................................................................................................................
II-3
1.3.1 CPU Core
.......................................................................................................................
II-3
1.3.2 ASIC
...............................................................................................................................
II-5
1.3.3 ROM
...............................................................................................................................
II-7
1.3.4 Flash Memory
.................................................................................................................
II-7
1.3.5 DRAM
.............................................................................................................................
II-8
1.3.6 Optional RAM
.................................................................................................................
II-9
1.3.7 Optional Serial I/O
........................................................................................................
II-10
1.3.8 EEPROM
......................................................................................................................
II-10
1.3.9 Reset Circuit
.................................................................................................................
II-11
1.3.10 Parallel I/O
..................................................................................................................
II-11
1.3.11 Engine I/O
...................................................................................................................
II-12
1.3.12 Paper Feed Motor Drive Circuit
..................................................................................
II-14
1.3.13 USB I/O
.......................................................................................................................
II-14
1.4 Driver PCB
..................................................................................................................................
II-14
1.5 SW Panel PCB
............................................................................................................................
II-14
1.6 Power Supply
..............................................................................................................................
II-15
1.6.1 Low-voltage Power Supply
...........................................................................................
II-15
1.6.2 High-voltage Power Supply, SR PCB
...........................................................................
II-16
2. MECHANICS
.......................................................................................................................................
II-17
2.1 Overview of Printing Mechanism
................................................................................................
II-17
2.2 Paper Transfer
............................................................................................................................
II-18
2.2.1 Paper Supply
................................................................................................................
II-18