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

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CONTENTS