i
CONTENTS
CHAPTER I FEATURES AND SPECIFICATIONS
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I-1
1.
SYSTEM REQUIREMENTS
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I-1
2. FEATURES
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I-1
3. SPECIFICATIONS
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I-4
3.1
Printing
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I-4
3.2
Functions
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I-5
3.3
Electrical and Mechanical
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I-6
3.4
Paper Specification
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I-7
3.5
Print Delivery
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I-7
3.6
Paper
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I-7
3.7
Effective Printing Area
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I-8
4.
SAFETY INFORMATION
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I-10
4.1
Laser Safety (110 - 120V Model only))
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I-10
4.2
CDRH Regulations (110 -120V Model only)
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I-10
4.3
Caution for Laser Product
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I-11
CHAPTER II THEORY OF OPERATION
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II-1
1. ELECTRONICS
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II-1
1.1
General Block Diagram
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II-1
1.2
Main PCB Block Diagram
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II-3
1.3
Main PCB
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II-5
1.3.1
CPU Core
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II-5
1.3.2
ASIC
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II-7
1.3.3
ROM
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II-13
1.3.4
DRAM
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II-13
1.3.5
Optional RAM
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II-15
1.3.6
Optional Serial
I/O
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II-16
1.3.7
EEPROM
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II-16
1.3.8
Reset Circuit
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II-17
1.3.9
CDCC I/O
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II-18
1.3.10 Engine I/O
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II-19
1.3.11 Paper Feed Motor Drive Circuit
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II-21
1.4
Panel Sensor PCB
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II-22
1.5
Power Supply
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II-23
2. MECHANICS
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II-24
2.1
Overview
of printing mechanism
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II-24
2.2
Paper Transfer
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II-25
2.2.1
Paper Supply
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II-25
2.2.2
Paper Registration
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II-25
2.2.3
Paper Eject
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II-26
2.3
Sensors
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II-27
2.3.1
Cover Sensor
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II-27
2.3.2
Toner Empty Sensor
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II-27
2.4
Drum Unit
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II-28
2.4.1
Photosensitive Drum
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II-28
2.4.2
Primary Charger
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II-28
2.4.3
Developer Roller
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II-28
2.4.4
Transfer Roller
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II-28
2.4.5
Cleaner Roller
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II-28