Brother HL-1020, HL-820, HL-1040 manual Contents

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-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

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