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Service Manual

HP LaserJet 2100

Publication number C4170-90959

First edition, February 1999

Trademark Credits

Adobe and PostScript are trademarks of Adobe Systems Incorporated which may be registered in certain jurisdictions.

Windows is a U.S. registered trademark of Microsoft Corporation.

Warranty

The information contained in this document is subject to change without notice.

Hewlett-Packard makes no warranty of any kind with regard to this material, including, but not limited to , the implied warranties or merchantability and fitness for a particular purpose.

Hewlett-Pack ard shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing, performance, or use of this material.

WARNING

Electrical Shock Hazard

To avoid electrical shock, use only supplied power cords and connect only to properly grounded wall outlets.

Hewlett-Packard Company 11311 Chinden Boulevard Boise, Idaho 83714 U.S.A.

Conventions

This manual uses the following conventions: The names of major printer parts and assemblies are Capitalized.

Color is used to emphasize items which are important to the material under discussion.

NOTE:

CAUTION:

WARNING!

Bold

is used for emphasis, particularly in situations where

Italic type

Notes contain important information set off from the text.

Caution messages alert you to the possibility of damage to equipment or loss of data.

Warning messages alert you to the possibility of personal injury.

is used to indicate related documents or emphasis.

italic

type would be confusing.

C4170-90959

Chapter Descriptions

Chapter 1: Product Information

This chapter describes features of the printer, including locations of external and internal assemblies, and gives safety and regulatory information. Use this chapter to form a basic service approach, and to get technical assistance.

Chapter 2: Operating Requirements

Chapter 2 details site requirements, including space and environmental specifics. The chapter also defines specifications for paper and other media with this printer.

Chapter 3: Printer Configuration

Learn to use the control panel, perform an engine test, and reset the printer. Chapter 3 contains options for configuring the printer through service mode, and also details about installing and using the Remote Control Panel. Network and IR printing is also explained.

Chapter 4: Printer Maintenance

This chapter discusses service check points, procedures for cleaning the printer, and how to use toner cartridges effectively.

Chapter 5: Functional Overview

The functional overview discusses each of the printer’s stages to form and develop an image. This chapter details the engine control system, the formatter system, the paper feed system, and the sequence of printer operation.

Chapter 6: Troubleshooting

Use the systematic troubleshooting process to solve printing problems. This process contains a preliminary troubleshooting flowchart, with explanations of each step throughout the chapter. Explanations include a table with descriptions and recommended actions for all control panel messages, image defect samples, troubleshooting problems with media, and diagrams showing the locations of components that may be causing problems.

Chapter 7: Removal and Replacement

Step-by-step procedures show how to replace field replaceable units (FRUs) in the printer.

Chapter 8: Parts and Diagrams

Exploded view drawings and part number listings are included for all replaceable parts in the printer. The composite table of replaceable parts is sorted alphabetically by part name, and also sorted numerically by part number. Both tables are cross-referenced to the diagrams in the chapter.

C4170-90959

Index

The index is an alphabetical, cross-referenced listing of information found in the main body of the manual.

C4170-90959

Contents

1 Product Information

Printer Description and Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Product Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

External Assembly Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Internal Assembly Locations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Laser Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Laser Statement for Finland . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

LED Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Declaration of Conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Toner Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Ozone Emission . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Environmental Product Stewardship Program . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Protecting the Environment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

FCC Regulations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Service Approach . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Bench Repair Warranty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

HP Express Exchange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Ordering Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Ordering Consumables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Ordering Related Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Technical Assistance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

HP ASAP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

HP FIRST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

HP Audio-Tips. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

HP Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Customer Support Worldwide. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Worldwide Sales and Service Offices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

2 Operating Requirements

Site Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

Operating Environment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Printer Space Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Media Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

General Media Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Guidelines for Selecting Paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

Media Input Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Tray 1 Media Sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

Tray 2 and Optional Tray 3 Paper Sizes. . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Envelope Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Label Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Transparency Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Storing Print Media . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

Shipping Print Media. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Paper Fillers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Testing Media Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

3 Printer Configuration

Using the Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Display LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Job Cancel Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Go Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Printing Demo Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Printing Self-Test/Configuration Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Continuous Self-Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Engine Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Service Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Accessing Service Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Setting the Page Count . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Setting the Cold Reset Default. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Resetting the Printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Cold Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

NVRAM Initialization. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Remote Control Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Installing the Remote Control Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Network Printing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Installing an HP JetDirect EIO Card. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

IR Printing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

4 Printer Maintenance

Service Check Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Cleaning the Printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

General Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Internal Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

Toner Cartridge Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Storage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Handling Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Refilled Toner Cartridges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Recycling Toner Cartridges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Toner Cartridge Weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Toner Cartridge Life Expectancy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Saving Toner with EconoMode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Redistributing the Toner. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

5 Functional Overview

Sequence of Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

Power On Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Timing Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Printer Functionality and Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

Formatter System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

Formatter Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Formatter Subsystems/Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Resolution Enhancement technology (REt - 600 dpi only). . . . . . . . . . . . . . 75

Print Density Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

EconoMode (600 dpi only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Memory Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Printer Job Language (PJL) Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

C4170-90959

Engine Control System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

Laser Scanner Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Paper Feed Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Microswitch Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Motor Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Fusing Assembly Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

Power Supply and Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

Image Formation System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Toner Cartridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Cleaning Stage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

Conditioning Stage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

Writing Stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

Developing Stage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

Transferring Stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

Fusing Stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

Paper Pick and Feed System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

Paper Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

Paper Size Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

Paper Jam Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

6 Troubleshooting

Troubleshooting Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

Preliminary Operating Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

Basic Fault Isolation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

Troubleshooting Process Flow. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

Power On . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

Troubleshooting with Control Panel Messages. . . . . . . . . . . . . . . . . . . . . . . . . . 96

Control Panel LED Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

Paper Handling Problems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

Print Test Pages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

Engine Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

Self-Test / Configuration Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

Paper Jam Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

Media and Paper Handling Problems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

Evaluate the Test Pages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

Status Log Messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

Verify Installed Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

Image Formation Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

Half Self-Test Functional Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132

Drum Rotation Functional Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133

Media Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134

Determine the Problem Source: Paper or Printer. . . . . . . . . . . . . . . . . . . . 134

Isolate a Paper Path. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134

Isolate a Paper Brand. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135

Isolate a Paper Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137

Evaluate Practices of Paper Users. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142

Evaluate Environmental Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142

Communication Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144

Communications Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144

Test Message. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144

EIO Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144

JetDirect Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146

Reference Diagrams. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147

Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147

Sensors and Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148

Component Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150

C4170-90959

7 Removal and Replacement

Removal and Replacement Strategy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156

Required Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157

Parts Removal Tree . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158

Toner Cartridge Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160

Tray 2 Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161

Transfer Roller Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162

Tray 2 Pickup Roller Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165

Tray 2 Pickup Roller Replacement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170

I/O Cover Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174

EIO Card Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174

DIMM Cover Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175

DIMM Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176

Formatter PCB Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177

EIO Shield and Guide Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179

Rear Cover Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180

Fusing Assembly Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182

Fusing Assembly Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185

Fusing Film Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186

Pressure Roller Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188

Engine Controller Assembly Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189

Top Cover Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192

Upper Output Delivery Roller Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . 195

Lower Output Delivery Roller Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . 197

Laser Scanner Assembly Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 198

Transport Belts and Rollers Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200

Transport Belts and Rollers Replacement . . . . . . . . . . . . . . . . . . . . . . . . . 202

Ribbon Cable Harness Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205

Printer Drive Assembly Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207

Main Motor Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209

Motor Plate Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210

Printer Drive Assembly Gear Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . 211

Tray 1 Pickup Roller Assembly Removal . . . . . . . . . . . . . . . . . . . . . . . . . . 212

Tray 1 Separation Pad Assembly Removal . . . . . . . . . . . . . . . . . . . . . . . . 215

Tray 1 Paper Sensor Lever Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217

Tray 1 Paper Sensor Lever Replacement . . . . . . . . . . . . . . . . . . . . . . . . . 219

Tray 1 Solenoid Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221

Tray 2 Pickup Roller Assembly Removal . . . . . . . . . . . . . . . . . . . . . . . . . . 222

Tray 2 Solenoid Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 224

Intermediate PCB Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 225

Registration Assembly Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 228

Fusing Assembly Ground Clip Replacement . . . . . . . . . . . . . . . . . . . . . . . 230

Tray 3 Assembly Connector Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . 231

Left Cover Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 232

Cooling Fan Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233

Toner Cartridge Guide Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 235

Tray 1 Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 237

Tray 1 Pickup Roller Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 240

Tray 1 Separation Pad Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243

DC Bias Voltage Contacts (Leaf Springs) Removal. . . . . . . . . . . . . . . . . . 245

DC Bias Voltage Contacts Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . 248

Tray 3 Cassette Assembly Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250

Tray 3 Pickup Roller Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 251

Tray 3 Paper Feeder Drive Assembly Removal. . . . . . . . . . . . . . . . . . . . . 252

Tray 3 Solenoid Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 254

C4170-90959

8 Parts and Diagrams

External Covers and Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 256

Top Cover Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 258

Internal Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260

Fuser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 266

Printer Drive Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 268

PCB Assembly Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 270

Paper Feeder Drive Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 272

Paper Tray . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 274

Paper Tray Pickup Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 276

Paper Tray External Covers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 278

Paper Tray Internal Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 280

Hardware Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 282

Alphabetical Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 284

Numerical Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 291

C4170-90959

Product Information

Contents

Printer Description and Features - - - - - - - - - - - - - - 2 Identification - - - - - - - - - - - - - - - - - - - - - - - - 4 Specifications - - - - - - - - - - - - - - - - - - - - - - - 5 Product Overview - - - - - - - - - - - - - - - - - - - - - 6 Safety Information - - - - - - - - - - - - - - - - - - - - - 9 FCC Regulations - - - - - - - - - - - - - - - - - - - - - 15 Service Approach - - - - - - - - - - - - - - - - - - - - 16 Technical Assist ance - - - - - - - - - - - - - - - - - - - 18

C4170-90959

Contents

Printer Description and Features

Table 1-1. Printer Description and Features

Print Speed

Print Quality

Paper Handling

Accessories

10 pages-per-minute (In tel 80960J D 66 MHz RISC-b ased f ormatter

●

and 33 MHz BUS). True 1200 by 1200 dots per inch (dpi) text and graphics.

●

Resolution Enhancement technology (REt) (600 dpi only).

●

Adjustable settings to optimize print quality and performance:

●

Best Quality: 1200 by 1200 dpi Faster Performance: 600 by 600 dpi Custom: User Defined Settings

HP UltraPrecise toner cartridge. Cartridge capacity equals

●

approximately 5000 pages at 5% toner cover. Adjustable Tray 1 for letterhead, envelopes, labels, transparencies,

●

custom-sized media, postcards, and heavy paper. Tray capacity equals approximately 100 sheets of standard paper or 10 standard envelopes.

Adjustable 250-sheet Tray 2 for standard sizes of paper.

●

Top output bin (for printing face down).

●

Rear output bin (for printing face up).

●

Straight-through p aper p ath capa bility from Tray 1 to the rear o utput

●

bin. Optional Tray 3 with a 250-sheet capacity.

●

PCL Printer Language and Fonts

PostScript Language Emulation and Fonts

Automatic Language and I/O Switching

Wireless Infrared Printing

Enhanced Input Output (EIO) cards.

●

Three dual in-line memory module (DIMM) slots.

●

PostScript™ Level 2 emulation DIMM. Factory installed on the

●

2100 M and 2100 TN. PCL6 with built-in Intellifont and TrueType scaling, HP-GL/2 vector

●

graphics, and advanced imaging capabilities. Also included are 45 scalable TrueType fonts and one bitmapped Line Printer font.

The HP LaserJet 2100 M and 2100 TN printers include the

●

PostScript Level 2 printer language emulation with 35 built-in PostSc ript langua ge fonts.

When optional printer l anguages (suc h as P ostScript em ulation) are

●

installed, the printer automatically determines and switches to the appropriate language for the print job.

With I/O switching, the printer switches back and forth between

●

active I/Os. Fast infrared (IR) printing when printing from an IrDA-compliant

●

device, such as a laptop, notebook computer, or a personal digital assistant (PDA).

JetSend IR enabled devices can also use the IR port.

●

2 Chapter 1 Product Information C4170-90959

Table 1-1. Printer Description and Features (continued)

Interface Connect ion s

Networking Memory and Memory

Expansion

Energy Savings

Economical Printing

IEEE-1284 compliant Type B parallel port

●

Data Transfer Rate: approximately 4 MB/second LocalTalk port

●

Enhanced Input/Output (EIO) Slot

●

Wireless Infrared port (IrDA compliant)

●

Date Transfer Rate: approximately 4 MB/second The printer provides an EIO slot for HP JetDirect print servers.

●

The HP LaserJet 2100 printer co mes with 4 MB of memory and can

●

be expanded to 52 MB using the three available memory (DIMM) slots.

The HP LaserJet 2100 M and 2100 TN printers come with 8 MB of

●

memory and can be expanded to 40 MB with the two available memory (DIMM) slots. The third slot is used for the PostScript language emulation DIMM.

The printer automatically conserves electricity by reducing power

●

consumption when not printing.

●

As an E

NERGY STAR

determined that this product meets E

partner, Hewlett-Packard Company has

NERGY STAR

guidelines for

energy effici enc y. EconoMode (600 dpi only), manual dup lexing, and N-up printing let

●

the user save paper, toner, and time.

Duty Cycle

Approximately 15,000 pages per month.

●

Table 1-2. Comparison of HP LaserJet 2100, 2100 M, and 2100 TN

HP LaserJet 2100

PS DIMM Optional Standard Standard Standard Memory

Maximum Memory JetDirect 600 N print

server

4 MB 52 MB

Optional Optional Standard

HP LaserJet 2100 M HP LaserJet

2100 TN

8 MB 40 MB

C4170-90959

Printer Description and Features

Identification

The serial number and the model number are listed on the identification label located on the rear output bin.

The serial number contains information about the country of origin, the revision level, the production code, and the production number of the printer.

As shown in figure 1-1, the label also contains power rating and regulatory information.

NOTE: These values vary by region.

Figure 1-1 Sample Identification Label

4 Chapter 1 Product Information C4170-90959

Specifications

Table 1-3. Physical Specifications

Height 230mm (9 in.) 309mm (12.2in.) Width 406 mm (15.9 in.) 406 mm (15.9 in.) Depth (body) 420 mm (16.5 in.) 420 mm (16.5 in.) Weight (with toner cartridge) 11.5 kg (25.4 lb.) 14.4 kg (31.7 lb.)

Table 1-4. Electrical Specifications

HP LaserJet 2100 HP LaserJet 2100 with

Optional Tray 3

100-127V (+/- 10%) 50/60Hz (+/- 2Hz)

Typical Power Consumption Printing 225 W (average)

Standby 12 W (instant power save)

Power save mode 12 W Off mode 0 W

Minimum recommended circuit capacity

5 Amps 2.5 Amps

220-240V (+/- 10%) 50/60 Hz (+/- 2Hz)

Printing 225 W (average) Standby 14 W (instant power

save) Power save mode 14 W Off mode 0 W

WARNING! Power requirements are based on the region where the printer is sold. Do not convert operating

voltages. This may damage the printer and void the product warranty.

Table 1-5. Environmental Specifications

Operating Printing Storage/Standby

Temperature

15 degrees to 32.5 degrees C

-20 degrees to 40 degrees C

C4170-90959

(printer and toner cartridge) Relative humidity 10% to 80% 10% to 90%

(59 degrees to 89 degrees F)

(-4 degrees to 104 degrees F)

Table 1-6. Acoustic Emissions (Per ISO 9296)

Operator Position Bystander (1m) Sound Power

Printing (HP LaserJet 2100 at 10 ppm)

Power Save In this mode, the printer is essentially quiet.

55dB(A) L

pAm

48dB(A) L

pAm

WAd

6.2 bels(A)

Specifications

Product Overview

External Assembly Locations

Figure 1-2 External Assembly Locations (1 of 4)

Tray 1

Top cover

Top output bin (face-down)

Expansion trays

Tray 2

DIMM cover

Figure 1-3 External Assembly Locations (2 of 4)

Rear output bin

Engine test

Power receptacle

Figure 1-4 External Assembly Locations (3 of 4)

Toner cartridge

I/O cover

Control panel

Powe r swi tch

6 Chapter 1 Product Information C4170-90959

Figure 1-5 External Assembly Locations (4 of 4)

Tray 3

Tray 3 assembly

C4170-90959

Product Overview

Internal Assembly Locations

Figure 1-6 Internal Assembly Locations (1 of 2)

Laser scanner assembly

Delivery rollers

Fusing film

Figure 1-7 Internal Assembly Locations (2 of 2)

Primary charging roller

Developing cylinder

Toner cartridge

Registration shutter

Tray 1 pickup roller

Tray 1

Registration rollers

Paper feeder (option)

Pressure roller

Fee d belt

Photosensitive drum

Transfer charging roller

Tray 2

Tray 3

Tray separation pads

Tray pickup rollers

8 Chapter 1 Product Information C4170-90959

Safety Information

Laser Safety

The Center for Devices and Radiological Health (CDRH) of the U.S. Food and Drug Administration has implemented regulations for laser products manufactured since August 1,

1976. Compliance is mandatory for products marketed in the United States. The printer is certified as a Class 1 laser product under the U.S. Department of Health and Human Services (DHHS) Radiation Performance Standard according to the Radiation Control for Health and Safety Act of 1968.

Since radiation emitted inside the printer is completely confined within protective housings and external covers, the laser beam cannot escape during any phase of normal user operation.

WARNING! Using controls, making adjustments, or performing procedures other than those specified in

this service manual may result in exposure to hazardous laser radiation.

Laser Statement for Finland

LASERTURVALLISUUS LUOKAN 1 LASERLAITE KLASS 1 LASER APP ARAT

HP LaserJet 2100 -laserkirjoitin on käyttäjän kannalta turvallinen luokan 1 laserlaite. Normaalissa käytössä kirjoittimen suojakotelointi estää lasersäteen pääsyn laitteen ulkopuolelle.

Laitteen turvallisuusluokka on määritetty standardin EN 60825-1 (1993) mukaisesti.

VAROITUS!

Laitteen käyttäminen muulla kuin käyttöohjeessa mainitulla tavalla saattaa altistaa käyttäjän turvallisuusluokan 1 ylittävälle näkymättömälle lasersäteilylle.

VARNING!

Om apparaten används på annat sätt än i bruksanvisning specificerats, kan användaren utsättas för osynlig laserstrålning, som överskrider gränsen för laserklass 1.

C4170-90959

Safety Information

HUOLTO

HP LaserJet 2100 -kirjoittimen sisällä ei ole käyttäjän huollettavissa olevia kohteita. Laitteen saa avata ja huoltaa ainoastaan sen huoltamiseen koulutettu henkilö. Tällaiseksi huoltotoimenpiteeksi ei katsota väriainekasetin vaihtamista, paperiradan puhdistusta tai muita käyttäjän käsikirjassa lueteltuja, käyttäjän tehtäväksi tarkoitettuja ylläpitotoimia, jotka voidaan suorittaa ilman er ikoist yökaluja.

VARO!

Mikäli kirjoittimen suojakotelo avataan, olet alttiina näkymättömälle lasersäteilylle laitteen ollessa toiminnassa. Älä katso säteeseen.

VARNING!

Om laserprinterns skyddshölje öppnas då apparaten är i funktion, utsättas användaren för osynlig laserstrålning. Betrakta ej strålen.

Tiedot laitteessa käytettävän laserdiodin säteilyominaisuuksista:

Aallonpituus 770-7 95 nm Teho 5 mW Luokan 3B laser

LED Safety

The infrared port on the control panel of this printer is classified as a Class 1 LED (light emitting diode) device according to International Standard IEC 825-1 (EN 60825-1). This device is not considered harmful, but the following precautions are recommended.

• Avoid direct eye exposure to the infrared LED beam.

• Be aware that the beam is invisible light and cannot be seen.

• Do not attempt to view the infrared LED beam with any type of optical device.

10 Chapter 1 Product Information C4170-90959

Declaration of Conformity

C4170-90959

Safety Information

Toner Safety

Composed of plastic and minute colored components, toner is a non-poisonous substance. If toner adheres to skin or clothes, remove as much of it as possible with dry tissue paper, and then wash with cold water. Hot water causes toner to gel and become difficult to remove.

NOTE: Avoid letting toner come into contact with vinyl because it easily breaks down the vinyl material.

Material Safety Data Sheet

The Toner Cartridge/Drum Material Safety Data Sheet (MSDS) can be obtained by contacting the HP LaserJet Supplies web site at:

http://www.hp.com/go/msds

If access to the Internet is not available, call the U.S. HP FIRST (Fax Information Retrieval Service Technology) at (1) (800) 231-9300. Use Index number 7 for a listing of the Toner Cartridge/Drum Material/Chemical Safety Data Sheets. Non-US customers should refer to “Technical Assistance” (page 18) for phone numbers and information.

Ozone Emission

The printer uses charging rollers in the electrophotographic process and therefore generates no appreciable ozone gas (O

12 Chapter 1 Product Information C4170-90959

Environmental Product Stewardship Program

Protecting the Environment

Hewlett-Packard Company is committed to providing quality products in an environmentally sound manner. This HP LaserJet printer has been designed with several attributes to minimize impacts on our environment.

This HP LaserJet printer design reduces:

Energy Consumption

Energy usage drops to as little as 12 W (110V) and 14 W (220V) while in low-power (PowerSave) mode. Not only does this save natural resources, but it also saves money without affecting the high performance of this printer. This product qualifies for E

NERGYSTAR

development of energy-efficient office products.

. E

NERGYSTAR

is a voluntary program established to encourage the

NERGY STAR

partner, Hewlett-Packard Company has determined that this product meets E Guidelines for energy efficiency.

is a U.S. registered service mark of the U.S. EPA. As an E

NERGYSTAR

Toner Consum pti on

EconoMode uses significantly less toner, which might extend the working life of the toner cartridge.

Paper Use

Depending on the type of software program in use, users can request for a number of pages of their documents to be printed on one sheet of paper. This N-up printing practice and the printer’s automatic/manual duplexing feature, which provides two-sided printing, can reduce paper usage and the resulting demands on natural resources.

The design of this HP LaserJet printer facilitates the recycling of:

Plastics

Plastic housing parts have markings according to international standards that enhance the ability to identify plastics for recycling purposes at the end of the printer’s life.

C4170-90959

Environmental Product Stewardship Program

HP LaserJet Printing Supplies

In many countries, this product’s printing supplies (e.g., toner cartridge, drum, fuser) can be returned to HP through the HP Planet Partners Printing Supplies Environmental Program. An easy-to-use takeback component of the program is available in over 20 countries. Multilingual program information and instruction are included in every new HP LaserJet Toner Cartridge and Consumables box.

HP Planet Partners

Since 1990, the HP LaserJet Toner Cartridge Recycling Program has collected more than 12 million used LaserJet toner cartridges that otherwise might have been discarded in the world’s landfills. The HP LaserJet toner cartridges go to a collection center and are bulkshipped to our recycling partners who disassemble the cartridge parts for recycling. After a through quality inspection, minor parts, such as nuts, screws, and clips are reclaimed for use in new cartridges. Remaining materials are separated and converted into raw materials for use by other industries to make a variety of useful products.

Paper

This printer is suited for the use of recycled papers when the paper meets the guidelines outlined in the suitable for the use of recycled paper according to DIN 19 309.

The design of this HP LaserJet printer facilitates the recycling of:

HP LaserJet Printer F amily Paper Specifications Guide

. Also, this printer is

Printer and Parts

HP provides a product return system for customers in Germany. Many of the functional parts are recovered, tested, and reused as fully warranted service parts. Used parts are not placed into new product manufacturing. Remaining product parts are recycled, if possible. For product return information, contact the local HP Sales and Service office.

To ensure longevity of the HP LaserJet printer, HP provides the following:

Extended warranty

HP SupportPack provides coverage for the HP hardware product and all HP-supplied internal components. The hardware maintenance covers a three-year period from date of the HP product purchase. The customer must purchase HP SupportPack within 90 days of the HP product purchase. Information on HP SupportPack is available in fax format by calling HP FIRST (fax-on-demand service). The document number is 9036. Customers should refer to the front of this manual for appropriate HP FIRST phone numbers and information.

Spare Parts and Consumables Availability

Spare parts and consumable supplies for this product will be made available for at least 5 years after production has been discontinued.

14 Chapter 1 Product Information C4170-90959

FCC Regulations

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy. If this equipment is not installed and used in accordance with the instructions, it may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. The presence of interference can be determined by turning the equipment off and on. If this equipment does cause harmful interference to radio or television communications, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.

• Increase the distance between the equipment and the receiver.

• Connect the equipment to an outlet on a circuit different from that to which the receiver

is located.

• Consult the dealer or an experienced radio/television technician.

NOTE: Any changes or modifications to the printer that are not expressly approved by HP could void

the user’s authority to operate this equipment. Use of a shielded interface cable is required to comply with the Class B limits of Part 15 of

FCC rules.

C4170-90959

FCC Regulations

Service Approach

Bench Repair Warranty

The warranty for this product is “return to bench” for a period of one year from the date of purchase. This means that customers needing warranty repair must return their printer to an HP repair center or an Authorized Service Provider (ASP).

HP Express Exchange

Through Customer Care Centers In the United States and Canada, customers have an option to initiate Express Exchange. Under this option, customers may have a factory refurbished printer sent to them within 24 hours.

1 The customer contacts the local HP Customer Care Center listed in the product

documentation. A technician troubleshoots the situation and determines whether the

printer has actually failed. If so, the technician refers the customer to the HP Service

Center. 2 A representative from the service center requests product and customer information. In

some regions, collateral may also be requested. 3 HP ships a refurbished replacement unit to arrive the next day. (Geographic distance

might prevent next-day shipping.) 4 The customer sends the defective printer to Hewlett-Packard at HP's expense. Customers with on-site support service provided by HP should work directly with the local

Customer Care Center instead of following the steps outlined here. Exchanged units carry the remainder of the original unit’s warranty or 90 days, whichever is

greater. The faster turnaround from HP Express Exchange minimizes downtime over traditional service programs that require the user to ship the failed unit to the manufacturer and then wait for it to be repaired and returned. Because HP pays the shipping charges, the user incurs no hidden costs for the service.

Ordering Parts

Field replaceable part numbers are listed in Chapter 8: Parts and Diagrams. Replacement parts can be ordered from HP’s Parts Direct Ordering or HP’s Parts Center Europe. Addresses and telephone numbers for both organizations are as follows:

Parts Direct Ordering Parts Center Europe

Hewlett-Packard Company Support Materials Organization 8050 Foothills Blvd. Roseville, CA 95678

1-800-227-8164 (U.S. only)

Hewlett-Packard Company Parts Center Europe Wolf-Hirth Strasse 33 D-7030 Boeblingen, Germany

(49 7031) 14-2253

16 Chapter 1 Product Information C4170-90959

Ordering Consumables

Consumables and accessories can be ordered directly from Hewlett-Packard. Telephone numbers for ordering consumables are as follows:

U.S. 1-800-538-8787 Canada 1-800-387-3154 Toronto 416-671-8383 United Kingdom 0734-441212 Germany 0130-3322

Ordering Related Documentation

The following table shows where to order related documentation. Telephone numbers for the various sources are as follows:

PDO (Parts Direct Ordering) 1-800-227-8164 (U.S. only) PCE (Parts Center Europe) 49 7031 14-2253 HPD (HP’s Distribution Center) 303-353-7650 (U.S. only)

Related Documentation

Description Part Number

HP LaserJet Printer Family Paper Specification Guide 5040-9092 HP LaserJet 2100, 2100 M, and 2100 TN Printers User Guide C4170-90901

NOTE: See “Worldwide Sales and Service Offices” (page 21) if a local HP office for the desired region

is not listed here.

C4170-90959

Service Approach

Technical Assistance

HP ASAP

HP ASAP (Automated Support Access Program) provides free technical support information 24 hours a day, 7 days a week. HP ASAP includes HP FIRST and HP Audio-Tips, which are both explained below. HP ASAP requires a touch-tone telephone.

HP FIRST

HP FIRST (Fax Information Retrieval Support Technology) is a telephone-in fax service providing technical information for HP LaserJet users as well as service personnel. Receiving a fax requires a group 3 facsimile machine or fax card. Service-related information includes:

• Service notes (HP Authorized dealers)

• Application notes

• Product data sheets

• Material Safety Data Sheets (MSDS)

• Typeface and accessory information

• Printer support software information

• Toner information

• Driver request form and Software Matrix

HP FIRST, U.S.

To use HP FIRST in the U.S. call HP ASAP and follow the instructions. The telephone number for HP ASAP in the U.S. is 1-800-333-1917. For all other areas, contact the local service provider.

HP FIRST, Europe

To use HP FIRST in Europe, call the local reseller to obtain phone numbers. For English service, call (31) 20-681-5792.

18 Chapter 1 Product Information C4170-90959

HP Audio-Tips

HP Audio-Tips, available within HP ASAP, is an interactive voice response system providing prerecorded answers to the questions most frequently asked by HP LaserJet printer users. Helpful system maps to the HP Audio-Tips recordings are available by fax through HP FIRST.

HP Support

Online Services: World Wide Web URL

Obtaining software utilities, drivers, and electronic Information for U .S. and Canada:

For European English:

HP Service Information:

HP Service Agreements:

and product and support information may be obtained at the following URLs:

in the U.S.: http://www.hp.com in Europe: http://www2.hp.com

America Online

U.S., France, Germany, and UK - Printer drivers, updated HP printer software, and support documentation to help answer questions about HP products are available. Use Keyword HP to start the tour or in the U.S. call 1-800-827-6364 preferred customer #1118 to subscribe.

CompuServe -

interactive sharing of technical information with other members is available on CompuServe’s “HP User’s forums” (GO HP), or call 1-800-524-3388 and ask for representative #51 to subscribe. (CompuServe is also available in the U.K., France, Belgium, Switzerland, Germany, and Austria.)

Phone:

(805) 257-5565

Fax:

(805) 257-6866

For U.K., call (44) (142) 986-5511. For Ireland and outside U.K., call (44) (142) 986-5511.

To locate HP-Authorized Dealers, call 1-800-243-9816 (U.S.) or 1-800-387-3867 (Canada).

Call 1-800-743-8305, option 2 (U.S.) or 1-800-268-1221 (Canada). Extended Service 1-800-446-0522.

- America Online/Bertelsmann is available in the

Printer drivers, updated HP printer software, and

- Printer drivers, updated HP printer software,

Mail:

Hewlett-Pac kard Company P.O. Box 1754 Greeley, CO 80632 U.S.A.

C4170-90959

Technical Assistance

Customer Support Worldwide

Customer Support and Product Repair Assistance for the U.S. and Canada:

European Customer Support Center Language and In-Country Opti on s

Availab le Monday through Friday 8:30–18:00 CET

English

Dutch

French

German

In-Country Support Numbers:

Service Offices” (page 21) for more information.

Ireland: (353) (1) 662-5525 UK: (44) (171) 512-5202 International: (44) (171) 512-5202

Belgium: (32) (2) 626-8806 Netherlands: (31) (20) 606-8751

Belgium: (32) (2) 626-8807

Germany: (49) (180) 525-8143

If the desired country is not listed, see “Worldwide Sales and

Call (1) (208) 323-2551 Monday through Friday from 6 am to 10 pm, Saturday 9 am to 4 pm (Mountain Time).

Call 1-800-243-9816 to locate the nearest authorized HP service provider, or call 208-223-2551 for HP centralized service dispatch.

Norwegian

Danish

Swedish

Italian

Spanish

Polish

Portuguese

Norway: (47) 2211-6299

Denmark: (45) 3929-4099

Sweden: (46) (8) 619-2170

Italy: (39) (2) 264-10350

Spain: (34) (90) 232-1123

Poland: (48-22) 608-77-00

Portugal: (351) (1) 441-7199

20 Chapter 1 Product Information C4170-90959

Worldwide Sales and Service Offices

Argentina Australia

Hewlett-Pac kard Argentina S .A. Montañeses 2140/50/60 1428 Buenos Aires Phone: (54) (1) 787-7100 Fax: (54) (1) 787-7213

Austria Belgium

Hewlett-Packard GmbH Lieblgasse 1 A-1222 Vienna Phone: (43) (1) 25000-555 Fax: (43) (1) 25000-500

Brazil Canada

Edisa Hewlett-Packard SA Alameda Rio Negro 750 06454-050 Alphaville - Barueri-SP

Canada Chile

Hewlett-Pac kard (Canada) Ltd. 5150 Spectrum Way Mississauga, Ontario L4W 5G1 Phone: (1) (905) 206-4725 Fax: (1) (905) 206-4739

Hewlett-Packard Australia Ltd. 31-41 Joseph Street Blackburn, VIC 3130

Hewlett-Pack ard Belgium S.A. NV Boulevard de la Woluwe-Woluwedal 100-102 B-1200 Brussels Phone: (32) (2) 778-31-11 Fax: (32) (2) 763-06-13

Hewlett-Packard (Canada) Ltd. 17500 Trans Canada Highway South Service Road Kirkland, Quèbec H9J 2X8 Phone: (1) (514) 697-4232 Fax: (1) (514) 697-6941

Hewlett-Packard de Chile Avenida Andres Bello 2777 of. 1 Los Condes Santiago, Chile

China Colombia

China Hewlett-Packard Co. Ltd. Level 5, West Wing Office China World Trade Center No. 1, Jian Guo Men Wai Avenue Beijing 100004 Phone: (86) (10) 6262-3888,x. 5450 Fax: (86) (10) 6505-1033

Hewlett-Packard Colombia Calle 100 No. 8A -55 Torre C Oficina 309 Bogotá, Colombia

Czech Republic Denmark

Hewlett-Packard s. r. o. Novodvorsk· 82 CZ-14200 Praha 4

Hewlett-Packard A/S Kongev ejen 25 DK-3460 Birkerød Denmark Phone: (45)3929 4099 Fax: (45) 4281-5810

Far East Region Finland

Hewlett-Packard Asia Pacific Ltd. 17-21/F Shell Tower, Times Square 1 Matheson Street, Causeway Bay Hong Kong Phone: (852) 2599-7777 Fax: (852) 2506-9261 Hardware Repair Center: Phone: (852) 2599-7000 Extended Warranty Support: Phone: (852) 2599-7000 Customer Information Center: Phone: (852) 2599-7066

Hewlett-Packard Oy Piispankalliontie 17 FIN-02200 Espoo Phone: (358) (9) 887-21 Fax: (358) (9) 887-2477

C4170-90959

Technical Assistance

France Germany

Hewlett-Pac kard France 42 Quai du Point du Jour F-92659 Boulogne Cedex Phone: (33) (146) 10-1700 Fax: (33) (146) 10-1705

Hewlett-Packard GmbH Herrenberger Straße 130 71034 Böblingen Phone: (49) (180) 532-6222

Fax: (49) (180) 531-6122

Greece Hungary

Hewlett-Pac kard Hellas 62, Kifissias Avenue GR-15125 Maroussi Phone: (30) (1) 689-6411 Fax: (30) (1) 689-6508

Hewlett-Packard Magyarorszag Kft. Erzsébet királyne útja 1/c. H-1146 Budapest

India Italy

Hewlett-Packard India Ltd. Paharpur Business Centre 21 Nehru Place New Delhi 110 019 Phone: (91) (11) 647-2311 Fax: (91) (11) 646-1117 Hardware Repair Center and Extended Warranty Support: Phone: (91) (11) 682-6000 Fax: (91) (11) 682-6030

Hewlett-Packard Italiana SpA Via Giuseppe di Vittorio, 9 Cernusco Sul Naviglio I-20063 (Milano)

Japan Korea

Hewlett-Pac kard Japan, Ltd. 3-29-21 Takaido-higashi Suginami-ku, Tokyo 168 Phone: (81) (3) 3335-8333 Fax: (81) (3) 3335-8338

Hewlett-Packard Korea 25-12, Yoido-dong, Youngdeungpo-ku Seoul 150-010 Phone: (82) (2) 769-0114 Fax: (82) (2) 784-7084 Hardware Repair Center: Phone: (82) (2) 3270-0700

(49) (180) 525-8143

(82) (2) 707-2174 (DeskJet) (82) (2) 3270-0710

Latin American Headquarters Mexico

5200 Blue Lagoon Drive Suite 950 Miami, FL 33126,USA Phone: (1) (305) 267-4220

Hewlett-Packard de México, S.A. de C.V. Prolongacion Reforma No. 700 Lomas de Santa Fe 01210 México, D.F.

Middle East/Africa Netherlands

ISB HP Response Center Hewlett-Packard S.A. Rue de Veyrot 39 P.O. Box 364 CH-1217 Meyrin - Geneva Switzerland Phone: (41) (22) 780-4111

Hewlett-Packard Nederland BV Startbaan 16 NL-1187 XR Amstelveen Postbox 667 NL-1180 AR Amstelveen

New Zealand Norway

Hewlett-Pac kard (NZ) Limited Ports of Auckland Building Princes Wharf, Quay Street P.O. Box 3860 Auckland Phone: (64) (9) 356-6640 Fax: (64) (9) 356-6620

Hewlett-Packard Norge A/S Postboks 60 Skøyen Drammensveien 169 N-0212 Oslo Phone: (47) 2273-5600 Fax: (47) 2273-5610

22 Chapter 1 Product Information C4170-90959

Poland Russia

Hewlett-Packard Polska Al. Jerozolimskic 181 02-222 Warszawa Phone: (48-22) 608-7700 Fax: (48-22) 608-7600

AO Hewlett-Packard Business Complex Building #2 129223, Moskva, Prospekt Mira VVC

Singapore Spain

Hewlett-Pac kard Singapore (Sales) Pte Ltd 450 Alexandra Road Singapore (119960) Phone: (65)275-3888 Fax: (65)275-6839 Hardware Repair Center and Customer Information Center: Phone: (65) 272-5300 Extended Warranty Support: Phone: (65) 272-5333

Hewlett-Packard Española, S.A. Carretera de la Coruña km 16.500 E-28230 Las Rozas, Madrid

Sweden Switzerland

Hewlett-Pac kard Sverige AB Skalholtsgatan 9 S-164 97 Kista Phone: (46) (8) 444-2000 Fax: (46) (8) 444-2666

Hewlett-Packard (Schweiz) AG In der Luberzen 29 CH-8902 Urdorf/Zürich

T aiwan Thailand

Hewlett-Pac kard Taiwan Ltd.| 8th Floor 337, Fu-Hsing North Road Taipei, 10483

Hewlett-Packard (Thailand) Ltd. 23-25/f Vibulthani Tower II| 2199 Rama 4 Rd, Klongton Klintoey, Bangkok 10110 Thailand Hardware Repair Center and Extended Warranty Support Contact: Phone: (66) (2) 661-3900 ext. 6001/ 6002 Customer Information Center: Phone: (66) (2) 661-3900 ext. 3211 Fax: (66) (2) 661-3943

C4170-90959

Turkey United Kingdom

Hewlett-Pac kard Company Bilgisayar ve Ölçüm Sistemleri A.S. 19 Mayis caddesi Nova Baran Plaza K.12 80220 Sisli-Istanbul Phone: (90) (212) 224-5925 Fax: (90) (212) 224-5939

Hewlett-Packard Ltd. Cain Road Bracknell Berkshire RG12 1HN Phone: (44) (134) 436-9222 Fax: (44) (134) 436-3344

Venezuela

Hewlett-Packard de Venezuela S.A. Los Ruices Norte 3A Transversal Edificio Segre Caracas 1071 Phone: (58) (2) 239-4244 Fax: (58) (2) 239-3080

Technical Assistance

24 Chapter 1 Product Information C4170-90959

Operating Requirements

Contents

Site Requirements - - - - - - - - - - - - - - - - - - - - 26 Media Specifications - - - - - - - - - - - - - - - - - - - 28

C4170-90959

Contents

Site Requirements

Operating Environment

The electrical and environmental specifications listed in “Specifications” (page 5) must be maintained to ensure the proper operation of this printer. Consider the following points before installing the printer:

• Install in a well-ventilated, dust-free area.

• Install on a level, flat, and continuous surface which can support the printer’s weight.

Make sure all four printer feet are level. Do not install on carpet or other soft surfaces.

• Ensure adequate power supply circuitry. Electrical specifications are listed in

“Specifications” (page 5).

• Install where there is stable temperature and humidity, with no abrupt changes (away

from water sources, humidifiers, air conditioners, refrigerators, or other major

appliances). Environmental specifications are listed in “Specifications” (page 5).

• Install away from direct sunlight, areas with vibration, open flames, ultrasonic heaters,

ammonia fumes, or magnets and devices that emit a magnetic field. If the printer is

placed near a window, make sure the window has a curtain or blind to block any direct

sunlight.

• Maintain enough space around the printer for proper access and ventilation. See

“Printer Space Requirements” (page 27) for more information.

26 Chapter 2 Operating Requirements C4170-90959

Printer Space Requirements

Figure 2-1 Printer Space Requirements

C4170-90959

Site Requirements

Media Specifications

General Media Specifications

NOTE: Advise users always to test a sample of paper before purchasing large quantities. Paper

suppliers should understand the requirements specified in the

Paper Specification Guide

The HP LaserJet 2100 printer accepts a variety of media, such as cut-sheet paper (including up to 100% recycled fiber content paper), envelopes, labels, transparencies, and customsize paper. Properties such as weight, composition, grain, and moisture content are important factors affecting printer performance and output quality. Paper that does not meet the guidelines outlined in this manual can cause the following problems:

• Poor print quality.

• Increased paper jams.

• Premature wear on the printer, requiring repair.

NOTE: Some paper may meet all of the guidelines in this manual and still not produce satisfactory

results. This might be the result of improper handling, unacceptable temperature and humidity levels, or other variables over which Hewlett-Packard has no control.

and this chapter.

HP LaserJet Printer Family

CAUTION: Using paper that does not meet HP specifications may cause problems for the printer, requiring

repair. This repair is not covered by the Hewlett-Packard warranty or service agreements.

28 Chapter 2 Operating Requirements C4170-90959

Guidelines for Selecting Paper

To achieve the best possible results, use only copier-grade 24 lb (90 g/m2) paper. Make sure the paper is of good quality, and free of cuts, nicks, tears, spots, loose particles, dust, wrinkles, voids, and curled or bent edges.

The following problems with paper can cause print quality deviations, jamming, or even damage to the printer.

Table 2-1. Guidelines for Selecting Paper

Symptom Problem with Paper Solution

Poor print quality or toner adhesion, problems with feeding

Dropouts, jamming, curl Stored improperly Store paper flat in its moisture-

Increased gray background shading, printer wear

Excessive cur l, problems with feeding

Jamming, damage to printer Cutouts or perforations Do not use paper with cutouts

Problems with feeding Ragged edges Use good quality paper

Too moist, too rough, too smooth, or embossed; faulty paper lot

Too heavy Use lighter paper; use the rear

Too moist, wrong grain direction, or short-grain construction

Try another kind of paper, between 100-250 Sheffield, 4-6% moisture content

proof wrapping

output bin Use the rear output bin

Use long-grain paper

or perforations

C4170-90959

Media Specifications

Media Input Options

The printer comes with two paper trays. By default, the printer draws first from Tray 1. If Tray 1 is empty, the printer draws from Tray 2 (or optional Tr ay 3 if it is installed).

Tray 1

Tray 2

Optional Tray 3

30 Chapter 2 Operating Requirements C4170-90959

Tray 1 Media Sizes

Tray 1 adjusts for sizes from 76 by 127 mm (3 by 5 in.) to 216 by 356 mm (8.5 by 14 in.). Tra y 1 should be used when printing the following:

• Envelopes

• Labels

• Transparencies

• Custom-sized media or cardstock

• Postcards

Table 2-2. Tray 1 Media Sizes

Tray 1 Dimensions Weight Capacity

Minimum Size (custom)

Maximum Size (custom)

76 by 127 mm (3 by 5 in.)

216 by 356 mm (8.5 by 14 in.)

60 to 163 g/m 43 lb bond)

(16 to

100 sheets of 80 g/m2 (20 lb bond) paper

Transparency Same as minimum and

maximum paper sizes listed above.

Labels Thickness:

Envelopes

Thickness: .10 to .14 mm (0.0039 to 0.0055 in.)

.10 to .14 mm (0.0039 to 0.0055 in.)

Up to 90 g/m

(16-24 lb)

75 typical

50 typical

Up to 10

NOTE: The printer supports a wide range of media sizes. Check the printer software for supported

sizes. Capacity may vary depending on media weight and thickness and on environmental conditions. Smoothness should be between 100 to 250 (Sheffield).

For information about measuring basis weight, see “Basis Weight Field Test” (page 39). For information about measuring caliper, see “Caliper Field Test” (page 40). For information about smoothness, see “Paper Finish Field Test” (page 41)

NOTE: Users may experience some paper jams when using any media with a length less than

178 mm (7 in.). This may be caused by paper that has been affected by environmental conditions. For optimum performance, make sure that users are storing and handling the paper correctly.

C4170-90959

Media Specifications

Tray 2 and Optional Tray 3 Paper Sizes

Tray 2 and optional Tray 3 have settings for the paper sizes shown in the following table. Use only standard copier paper when printing from Tray 2 or optional Tray 3. Other types of printable media might jam when printing from Tray 2 or optional Tray 3.

Table 2-3. Tray 2 and Optional Tray 3 Paper Sizes

Tray 2 or Tray 3 Dimensions Weight Capacity

Letter 216 by 279 mm

(8.5 by 11 in.)

A4 210 by 297 mm

(8.3 by 11.7 in.)

Executive 1 91 by 267 mm

(7.3 by 10.5 in.)

Legal 216 by 356 mm

(8.5 by 14 in.)

B5 (ISO) 176 by 250 mm

(6.9 by 9.9 in.)

B5 (JIS) 182 by 257 mm

(7.2 by 10 in.)

A5 148 by 210 mm

(5.8 by 8.2 in.)

8.5 x 13 in. 216 by 330 mm (8.5 by 13 in.)

60 to 105 g/m 28 lb bond)

(16 to

250 sheets of (80 g/m2) (20 lb bond) paper

NOTE: Capacity may vary depending on media weight and thickness and on environmental

conditions.

For information about measuring basis weight, see “Basis Weight Field Test” (page 39).

32 Chapter 2 Operating Requirements C4170-90959

Envelope Specifications

Envelope construction is critical. Envelope fold lines can vary considerably, not only between manufacturers, but also within a box from the same manufacturer. Successful printing on envelopes depends upon the quality of the envelopes. When selecting envelopes, consider the following components:

• Weight: The weight of the envelope paper should not exceed 105 g/m jamming may occur.

• Construction: Prior to printing, envelopes should lie flat with less than 6 mm (0.25 in.) curl, and should not contain air.

• Condition: Envelopes should not be wrinkled, nicked, or otherwise damaged.

• Temperature: Envelopes should be compatible with the heat and pressure of the printer.

• Size: Envelopes must be within the following size ranges.

Minimum Maximum

76 by 127 mm (3 by 5 in.)

216 by 356 mm (8.5 by 14 in.)

NOTE: Use only Tray 1 to print envelopes.

Some paper jams might occur when using any media with a length less than 178 mm (7 in.). This might be caused by paper that has been affected by environmental conditions.

Envelopes might meet the general specifications listed in table 2-4 and still not print satisfactorily because of the printing environment or other variables over which HP has no control.

(24 lb) or

C4170-90959

Table 2-4. Envelope Specifications

Description Specification

Paper Paper used for envelope construction must meet the paper

specifications listed in this manual and the

Specifications Guide

Basis Weight 16 to 27 lb (60 to 100 g /m2), s ingle thic kne ss . J amm ing migh t resul t if

27 lb (100 (page 39).

Finish Avoid using envelopes with adhesive exposed to the printer.

Envelopes m ust be fo lded accurately (+/- 0.04 in.) so that there are no more than two thicknesses of paper anywhere along the leading edge. All folds must be well scored and sharply creased, and construction must be tig ht (not b agg y). A v oid using env elo pes tha t are stuck together with excess seam gum.

g/m

(except for those listed below).

) is exceeded. See “Basis Weight Field Test”

HP LaserJet Printer Paper

Media Specifications

Table 2-4. Envelope Specifications (continued)

Description Specification

Fusing Compatibility All inks, adhesives, and other material s used in the en v e lope m ust b e

compatible with the heat and pressure of the fusing process. Materials must not discolor, melt, offset, or release hazardous emissions when heated to 200 degrees Celsius (392 degrees Fahrenheit) for 0.1 second. See “Fusing Compatibility Field Test” (page 43).

Curl (Pre-printed) Envelopes must lie flat, with no more than 5 mm (0.2 in.) curl across

the entire surface. See “Curl Field Test” (page 42).

Caliper 0.084 to 0.14 mm (.0034 in. to .0056 in.), single thickness. See

“Caliper Field Test” (page 40).

Envel ope s wit h Adhe sive Strips or Flaps

Envelopes with a peel-off adhesive strip or with more than one flap that folds over to seal must use adhesives compatible with the heat and pressure in the printer. The extra flaps and strips might cause wrinkling, creasing, or jams and may even damage the fuser.

Envelope Storage

Proper storage of envelopes contributes to print quality. Envelopes should be stored flat. If air is trapped in an envelope, creating an air bubble, then the envelope may wrinkle during printing.

34 Chapter 2 Operating Requirements C4170-90959

Envelopes with Double Side Seams

Double side-seam construction has vertical seams at both ends of the envelope rather than diagonal seams. This style may be more likely to wrinkle. Be sure the seam extends all the way to the corner of the envelope as illustrated below.

Envelope Margins

The following gives typical address margins for a commercial #10 or DL envelope.

Table 2-5. Envelope Margins

Type of Address Top Margin Left Margin

Return address 15 mm (0.6 in.) 15 mm (0.6 in.) Delivery address 51 mm (2 in.) 89 mm (3.5 in.)

NOTE: For the best print quality, position margins no closer than 15 mm (0.6 in.) from the edges of

the envelope. Avoid printing over the area where the envelope seams meet.

C4170-90959

Media Specifications

Label Specifications

When selecting labels, consider the quality of each component:

• Adhesives: The adhesive material should be stable at 200 degrees C (392 degrees F), which is the printer’s fusing temperature.

• Arrangement: Only use labels with no exposed backing between them. Labels can peel off sheets with spaces between the labels, causing serious jams.

• Curl: Prior to printing, labels must lie flat with no more than 13 mm (.5 in.) of curl in any direction.

• Condition: Do not use labels with wrinkles, bubbles, or other indications of separation.

CAUTION: To avoid damaging the printer, use only labels recommended for laser printers.

To prevent serious jams, always use Tray 1 to print labels and always use the rear output bin. Never print on the same sheet of labels more than once or print on a partial sheet of labels.

Table 2-6. Label Specifications

Description Specification

Adhesive Must not be on any external surfaces of the label before, during, or

after printing. Label construction and die-cutting must not let labels peel off during transport, printing, or fusing.

Caliper Must not exceed 0.19 mm (0.007 in.). See “Caliper Field Test”

(page 40). Curl In ream: flat within 5 mm (0.2 in.). See “Curl Field Test” (page 42). Surface Resistivity 2.0 to 15 x 10 to the 10th ohm square. See “Tools and Suppliers”

(page 43). Volume Resistivity 1.2 to 15 x 10 to the 11th ohm-centimeter. See “Tools and Suppliers”

(page 43) Finishing Precision Cut sheet within 0.79 mm (0.031 in.) of nominal and +0.20 degrees

square. Fusing Comp atibility All adhesives, carrier sheets, top sheets, and other materials used in

label construction mu st be compatible wi th the heat and pressure of

the fusing process. Materials must not discolor, melt, offset, or

release hazardous emissions when heated to 200 degrees Celsius

(392 degrees Fahrenheit) for 0.1 second. See “Fusing Compatibility

Field Test” (page 43). Packaging Moisture-proof wrap to preserve properties. Shelf Life One year, maximum, stored at 22 degrees Celsius (72 degrees

Fahrenheit) and 50 percent relative humidity.

36 Chapter 2 Operating Requirements C4170-90959

Transparency Specifications

Transparencies used in the printer must be able to withstand 200 degrees C (392 degrees F), the printer’s fusing temperature. To avoid damaging the printer, use only transparencies recommended for use in laser printers, and print transparencies to the top output bin.

CAUTION: To avoid jams, print transparencies to the top output bin only.

Table 2-7. Transparency Specifications

Description Specification

Surface Resistivity 2.0 to 15 x 10 to the 10th ohm square. See “Tools and Suppliers”

(page 43). Volume Resistivity 1.2 to 15 x 10 to the 11th ohm-cm. See “Tools and Suppliers”

(page 43). Finishing Precision Cut sheet within 0.79 mm (0.031 in.) of nominal and +0.20 degrees

square. Fusing Compatibility Transparency materials must be compatible with the heat and

pressure of the fusing process. Materials must not discolor, melt,

offset, or release hazardous emissions when heated to 200 degrees

Celsius (392 degrees Fahrenheit) for 0.1 second. See “Fusing

Compatibility Field Test” (page 43). Caliper 0.100 to 0.110 mm (.0039 to .0043 in.). See “Caliper Field Test”

(page 40).

Storing Print Media

Ideally, the printing and paper storage environment should be at or near room temperature, and not too dry or too humid. Remember paper is hygroscopic; it absorbs and loses moisture rapidly.

Heat works with humidity to damage paper. Heat causes the moisture in paper to evaporate, while cold causes it to condense on the sheets. Heating systems and air conditioners remove most of the humidity from a room. As a paper package is opened and used, it loses moisture, causing streaks and smudging. Humid weather or water coolers can cause the humidity to increase in a room. As paper is opened and used it absorbs any excess moisture, causing light print and dropouts. Also, as paper loses and gains moisture it can distort. This can cause paper jams.

As a result, paper storage and handling are as important as the paper-making process itself. Paper storage environmental conditions directly affect the feed operation.

Users should not purchase more paper than can be easily used in a short time (about 3 months). Paper stored for long periods may experience heat and moisture extremes, which can cause damage. Planning is important to prevent damage to a large supply of paper.

C4170-90959

Unopened paper in sealed reams can remain stable for sev er al months before use. Opened packages of paper have more potential for environmental damage, especially if they are not wrapped with a moisture-proof barrier.

Media Specifications

The paper storage environment should be properly maintained to ensure optimum printer performance. The required condition is 20 degrees to 24 degrees C (68 degrees to 75 degrees F), with a relative humidity of 45% to 55%. The following guidelines should be helpful when evaluating the paper's storage environment:

• Paper should be stored at or near room temperature.

• The air should not be too dry or too humid (due to the hygroscopic properties of paper).

• The best way to store an opened ream of paper is to rewrap it tightly in its moisture-proof wrapping. If the printer environment is subject to extremes, unwrap only the amount of paper to be used during the day's operation to prevent unwanted moisture changes.

Shipping Print Media

When shipping print media through different environments, plastic wrap all cartons on the shipping pallet. When shipping media across bodies of water, wrap individual cartons as well. Packaging must protect the media from physical damage.

Paper Fillers

Additional chemicals and fillers are frequently added to paper during the manufacturing process. These may affect the paper strength, pick resistance, printability, bulk, feel and color.

An emulsion containing wax, rosin, starch, or other non-water soluble materials is added to the paper pulp to help control penetration by water and other liquids. Dyes are added and the paper may be bleached. Bleaching is a multi-step process using such chemicals as hydrogen peroxide and chlorine dioxide. This transforms the paper from its original brownish state to the desired color.

Finely ground fillers, such as clay, talc, and calcium carbonate may be added to even out the “peaks and valleys” which occur in the paper mixture, and serve as brighteners. Over time, these fillers can build up on internal assemblies of the printer such as rollers or the toner cartridge. This buildup can eventually cause paper jams and print defects. To minimize this risk, peri odically clean the printer according to the pr ocedures covered in Chapter 4: Printer Maintenance.

Testing Media Specifications

The following tests describe ways to qualify the media with respect to the specifications listed in this manual and the “Tools and Suppliers” (page 43) for help in obtaining tools needed to perform these tests.

HP LaserJet Printer F amily Paper Specifications Guide.

See

38 Chapter 2 Operating Requirements C4170-90959

Basis Weight Field Test

The basis weight should be indicated on the ream label. If the label is not available, a simple field test can identify the basis weight of paper. The basis weight of paper is equal to the weight of 2000 sheets of paper, or 4 full reams. Weigh a full ream on a postal scale and then multiply that weight by 4. Or weigh 10 sheets of paper, divide that weight by 10, multiply by 2000, and then divide by 16.

Table 2-8. Determining Basis Weight of Paper

Amount Formula

4 reams weight = basi s weight 1 ream weight x4 = basis weight 10 sheets (weight divided by 10) x 2000 and then divide by 16 = basis weight

Example:

10 sheets weigh 1.6 oz.

0.16 oz. x 2000 = 320 oz.

16 oz./lb = 20 lb paper

320 oz.

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Media Specifications

Paper Weight Equivalence Table

Use this table to determine approximate equivalent points in weight specifications other than U.S. bond weight. For example, to determine the equivalent of 20 lb U.S. bond weight paper in U.S. cover weight, locate the bond weight (in row 3, second column) and scan across the row to the cover weight (in the fourth column). The equivalent is 28 lb.

Table 2-9. Paper Weight Equivalence

U.S. Post Card thickness (mm)

U.S. Bond Weight (lb)

U.S. Text/ Book Weight (lb)

U.S. Cover Weight (lb)

U.S. Bristol Weight (lb)

U.S. Index Weight (lb)

U.S. Tag Weight (lb)

Europe Metric Weight (g/m2)

Japan Metric Weight (g/m2)

1 16 41 22 27 33 37 60 60 2 17432429353964

64 3 20 50 28 34 42 46 75 75 4 215430364449 5 22563138465181

80 80

81 6 24 60 33 41 50 55 90 90 7 276837455561 8

28 70 39 49 58 65 105 105

100 100

9 32 80 44 55 67 74 120 120

10 34 86 47 58 71 79 128 11

36 90 50 62 75 83 135 135

128

12 .18 39 100 55 67 82 91 148 148 13 .19 42 107 58 72 87 97 157 14

.20 43 110 60 74 90 100 163 163

157

15 .23 47 119 65 80 97 108 176 176 16 53 134 74 90

110 122 199 199

NOTE: U.S. Post Card measurements are approximate. Use for reference only.

Metric Sizes

For metric size paper (A4), use the following method to determine basis weight. Take 16 sheets of A4 paper and weigh them. One square meter of paper contains

approximately 16 A4 size sheets. Compare this weight to the appropriate weight in “Paper Weight Equivalence” (page 40).

Caliper Field T e st

Specification: The specified caliper differs with the type of media used. See “Operating Requirements” (page 25) for additional information.

Caliper can be measured in the field using a micrometer.

40 Chapter 2 Operating Requirements C4170-90959

CAUTION: Never use the coarse adjustment end of the micrometer when measuring for caliper. The

coarse adjustment will compress the paper fibers, resulting in an inaccurate reading. For example, if the fibers are compressed, 6 mil paper could measure as little as 3 mils. Always use the fine adjustment to measure caliper.

Using the fine adjustment, slide the micrometer along the edge of the paper and measure at one end. To double-check the accuracy of the reading, always measure again at the opposite end of the paper.

Paper Finish Field Test

Paper finish, or smoothness, can be accurately measured with a Sheffield meter. If this tool is not available, use a new U.S. dollar bill as a benchmark for comparing paper texture. A dollar bill has a finish of 350 Sheffields, which is 100 over specifications. if paper feels as rough as a dollar bill, it is recommended that users do not continually use this paper in the printer.

Moisture Content Field Test

Specification: Use paper with 4-6% moisture content. A ream or sheet of paper may be measured with a moisture meter. In general, only evaluate

the customer’s storage environment when trying to determine if excess moisture or dryness is the cause of a problem with paper.

Grain Field Test

The grain direction is usually specified on the ream label (written out "long" or "short"). The paper dimensions listed on the label also indicate grain direction. For example, short grain letter size paper will read "11 x 8.5" and long grain will read "8.5 x 11."

If the grain direction is not included on the ream label, it can be determined by a simple wet test. Cut a small square from the corner of a sheet of paper, wet it, and observe the manner in which it curls.

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Media Specifications

Envelopes should have a diagonal grain, which gives them the best stability. To determine this, cut a square section from one corner of an envelope. Wet this section and observe the manner in which it curls. Two opposite corners should curl toward each other.

Figure 2-2 Long, Short, and Diagonal Grain Curl

Curl Field Test

To check for paper curl, place a single sheet of paper onto a flat surface and measure curl at the greatest deflection, holding a ruler perpendicular to the flat surface.

Figure 2-3 Measuring Curl

Cut Edge Condition Field Test

The condition of the cut edge can be easily observed with an eye loop. Under magnification, a good edge will appear even. A poorly cut edge will show fraying, jagged edges, compressed fibers, and other damage.

Furnish (Fiber Composition) Field Test

Specification: Use paper made form 100% chemical wood pulp and /or cotton fiber. Recycled paper made with no more than 5% groundwood is also acceptable.

42 Chapter 2 Operating Requirements C4170-90959

Read the ream label to determine the fiber composition of the paper. Paper is usually specified as xerographic bond (suitable for copiers or laser printers) or cotton bond. Cotton bond paper of 25%, 50% or 100% will be indicated on a watermark. If paper is less than 25% cotton bond, the watermark will not indicate a percentage. A wood pulp test kit may also be used to test fiber composition.

Fusing Compatibility Field Te st

Inspect the rollers for colored ink build-up from pre-printed logos or letterhead, and for toner build-up or spots. Inspect printed output for repetitive defects and smearing. If necessary, have users contact the forms vendor to ensure paper’s fusing compatibility with HP LaserJet printers.

Tools and Supp liers

Hewlett-Packard neither warrants nor recommends a particular manufacturer, supplier, or tool. Products are subject to change and HP has no control over such changes. However, the following table of tools and their suppliers is provided for convenience.

Table 2-10. Tools and Suppliers

Tool Part Number Supplier Address

Paper Moisture Meter

Single Sheet Clamp Probe Temperature / Humidity Meter #3T331 Industrial Motor Service

Sheffield Tester: Precisionaire Column

Sheffield Tester: Smoothcheck Gauge Wood Pulp Test Kit

pH Test Kit Resistivity Test Tool:

Precision Current / Resistance Meter Resistivity Test Tool: Surface Resistivity Probe

2RRDMP

2R43E

TM 58-25-01

TM 58-25-02 4280-2

4360-2

278 96117-1

Mitchell Instrument 1570DDD Cheroke St. San Marcos, CA 92069-2433

2000 Albright Montgomery, IL 60538

TMI Testing Machines Inc. 400 Bayview Avenue Amityville, NY 11701 (516)842-5400

Shape Products 1127 57th Avenue Oakland, CA 94621 (800)444-0015

Monroe Electronics 100 Housel Avenue PO Box 100 Lyndonville, NY 14098 (800) 821-6001

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Media Specifications

44 Chapter 2 Operating Requirements C4170-90959

Printer Configuration

Contents

Using the Control Panel - - - - - - - - - - - - - - - - - 46 Engine Test - - - - - - - - - - - - - - - - - - - - - - - 50 Service Mode - - - - - - - - - - - - - - - - - - - - - - 51 Resetting the Printer - - - - - - - - - - - - - - - - - - - 54 Remote Control Panel - - - - - - - - - - - - - - - - - - 55 Network Printing - - - - - - - - - - - - - - - - - - - - - 56 IR Printing - - - - - - - - - - - - - - - - - - - - - - - - 57

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Contents

Using the Control Panel

As shown in figure 3-1, this printer’s control panel has only two buttons: JOB C Pressing one of these buttons or a combination of the two does the following:

• Cancels print jobs.

• Resumes printing when the printer is paused.

• Prints a demo page or a self test/configuration page.

• Initiates a continuous self test.

• Performs a cold reset or an NVRAM initialization.

• Reveals secondary information (for example, LED messages). Other printer configurations must be performed via PJL commands or using the LaserJet

configuration utility. See “Service Mode” (page 51) for more information.

Figure 3-1 HP LaserJet 2100 Control Panel LEDs

ANCEL

and GO.

Display LEDs

The control panel LEDs provide both status and error messages via distinct light patterns. See Chapter 6: Troubleshooting for more information.

Job Cancel Button

Press JOB C print job is cleared from both the printer and the computer, and then return to ready. This might take some time, depending on the size of the print job.

• If J

OB CANCEL OB CANCEL

the printer will return to the ready state.

to cancel the current print job. The control panel LEDs will cycle while the

ANCEL

is accidentally pushed, the job must be reprinted.

is pushed when the printer is idle, the top panel status lights will cycle and

Go Button

• Press GO to resume printing when the printer is paused or when unprinted data is still in the printer.

• Press G

to clear some printer errors.

46 Chapter 3 Printer Configuration C4170-90959

Printing Demo Page

To print the demo page, press the GO button when the printer is in the ready state.

Figure 3-2 HP LaserJet 2100 Demo Page

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Using the Control Panel

Printing Self-Test/Configuration Page

The configuration page lists many of the current settings and properties of the printer. To print the configuration page, press and release the G simultaneously when the printer is ready. If an EIO card is installed, a JetDirect Configuration Page also prints (see figure 3-4).

Configuration Page Elements

Figure 3-3 HP LaserJet 2100 Self-Test/Configuration Page

and JOB C

ANCEL

buttons

1 Printer Information lists the name, formatter number, serial number, firmware

datecode, page count, LocalTalk information (name, node ID, and network number), PostScript Level 2 emulation wait timeout, and HP JetSend address.

2 Installed Personalities and Options lists the installed printer languages (PCL, PCLXL,

and PostScript Level 2 emulation) and the options installed in each of the three DIMM slots and the EIO slot.

3 Memory lists total memory, available memory, I/O buffering information, and resource

saving information.

4 Status Log lists the PJL status code and the corresponding page count. (The status log

only appears when errors have been registered.)

5 Settings lists settings for copies, paper, wide A4, courier, orientation, form, manual

feed, Resolution Enhancement technology (REt), resolution, personality, I/O timeout, reprint, font (source, number, pitch, symbol set, and line term), PostScript Level 2 emulation error reporting, tray (multipurpose tray designation, tray locking, auto continue, density, and tray mode), and I/O buffer.

48 Chapter 3 Printer Configuration C4170-90959

Figure 3-4 HP LaserJet 2100 JetDirect Configuration Page

1 General Information lists the HP JetDirect number, firmware revision, LAN hardware

address, selected port, manufacturing ID, I/O card status, and network statistics (unicast packets, total packets, bad packets, framing errors received, packets transmitted, unsendable packets, transmit collisions, and transmit late collisions).

2 Protocol Information lists TCP/IP status and configuration, the HP Web JetAdmin

server name, Novell NetWare status and configuration, AppleTalk status and configuration, and DLC/LLC status.

Continuous Self-Test

To initiate a continuous self-test, first turn the printer power off. After the power is off press and hold the G for 15 or more seconds (after 15 seconds all of the LEDs turn on). The continuous self-test begins once the G released, the LEDs cycle one after another. As the continuous self-test pages print, the Ready LED blinks. The printer prints self-test/configuration pages until the J button is pressed.

button. Turn the printer power back on and continue to hold the GO button

button is released (anytime after 15 seconds). When the GO button is

OB CANCEL

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Using the Control Panel

Engine Test

The engine test can be used to verify that the print engine is functioning correctly. The formatter PCB is completely bypassed during an engine test; therefore, this test is useful for isolating problems. The engine test prints a full page of horizontal lines across the entire printable area. The engine test page is also useful for checking registration.

To print an engine test page, use a long, non-conductive object to press the engine test button shown in figure 3-5. A single page is printed.

WARNING! Do not use an electrically conductive object to press the engine test button.

Do not insert any object into the opening next to the power cord socket as shown in figure 3-5. This is not the engine test button.

Figure 3-5 Engine Test Button

50 Chapter 3 Printer Configuration C4170-90959

Service Mode

In Service Mode the following can be preformed:

• Print a Service Mode Self-Test.

• Verify and set the page count. See “Setting the Page Count” (page 53) for information.

• Set the Cold Reset Default. See “Setting the Cold Reset Default” (page 53) for information.

• Set the Demo Page=True/False Used to remove the demo page from the service mode self-test.

• Set the Diagnostic Functions On or Off. For software developers use only.

Accessing Service Mode

Use PJL commands to enter service mode and perform various service mode configurations. Users must use the exact character and case specified for PCL printer commands. The following are elements of a typical printer command:

• Escape character (begins escape sequence)

• Parameterized character

• Group character

• Value field (contains both alpha and numeric characters)

• Termination character (uppercase)

Escape sequences may be combined into one escape sequence string. There are three important rules to follow when combining code:

1 The first two characters after the

must be the same in all of the commands to be combined.

2 When combining escape sequences, change the uppercase (termination) character in

each individual escape sequence to lowercase.

3 The final character of the combined escape sequence must be uppercase.

character (the parameterized and group characters)

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Service Mode

Entering Escape Characters

Printer commands always begin with the escape character (

). The following table shows

how the escape character can be entered from various DOS software applications.

DOS Software Application Entry What Appears

Lotus 1-2-3 and Symphony Type \027 027 Microsoft Word for DOS Hold down ALT and type 027 on

the numeric keypad WordPerfect for DOS Type <27> <27> MS-DOS Edit Hold down CTRL-P, and press

ESC MS-DOS Edlin Hold down CTRL-V, and press [ ^[ DBASE Type ?? CHR(27)+"command" ?? CHR(27)+" "

<--

Table 3-1 shows how to use PJL commands to enter service mode and perform various service mode configurations.

Table 3-1. PJL Service Mode Commands

PJL Command Description

EC%-12345X@PJL Start PJL job. @PJL SET SERVICEMODE=HPBOISEID Enter Service Mode

@PJL SET PAGES=0 Set page count [= xxxxx] @PJL SET CRPAPER=LETTER Sets cold reset page size [=Letter/A4] @PJL SET SKIPDEMO=FALSE Skips demo/PCL type page [=true/false] @PJL SET DIAGNOSTICS-OFF Sets diagnostics [=OFF/ON] (for ISV use) @PJL SET SERVICEMODE=EXIT Exits Service Mode DEFAULT PAPER=LETTER Selects user paper size default @PJL RESET Performs PJL reset E

%-12345X Exits PJL mode

ECZ Prints self test/configuration page

E Re set s the printer

52 Chapter 3 Printer Configuration C4170-90959

Setting the Page Count

The page count is stored in the printer’s non-volatile memory (NVRAM). If it is necessary to replace the formatter PCB, the page count should be reset to the printer’s original page count to reflect the age of the print engine. Before removing the old formatter PCB, print a self-test/configuration page to verify the current page count of the printer, if possible. See “Printing Self-Test/Configuration Page” (page 48) for information.

Table 3-2. Setting the Page Count Via PJL Service Mode Commands

PJL Command Description

EC%-12345X@PJL Start PJL job. @PJL SET SERVICEMODE=HPBOISEID Enter Service Mode

@PJL SET PAGES=0 Set page count [= xxxxx] @PJL SET SERVICEMODE=EXIT Exits Service Mode @PJL RESET Performs PJL reset E

%-12345X Exits PJL mode

Z Prints self test/configuration page

ECE Re set s the printer

Setting the Cold Reset Default

The customization variable will determine the default paper size after a cold reset. This is set to A4/Letter at the manufacturer. This variable may need to be reset when replacing the formatter.

Table 3-3. Setting the Cold Reset Default Via PJL Service Mode Commands

PJL Command Description

EC%-12345X@PJL Start PJL job. @PJL SET SERVICEMODE=HPBOISEID Enter Service Mode

@PJL SET CRPAPER=LETTER Sets cold reset page size [=Letter/A4] @PJL SET SERVICEMODE=EXIT Exits Service Mode @PJL RESET Performs PJL reset E

%-12345X Exits PJL mode

Z Prints self test/configuration page

ECE Re set s the printer

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Service Mode

Resetting the Printer

Cold Reset

To perform a cold reset, turn the printer power off, then press and hold the JOB C button. Turn the printer power back on and after all the LEDs come on release the J

A cold reset changes most system parameters in NVRAM to the factory defaults. The J

an NVRAM initialization is performed instead of a cold reset.

button.

ANCEL

button must be released within 20 seconds after all of the LEDs come on; otherwise,

ANCEL

NVRAM Initialization

An NVRAM initialization reinitializes NVRAM and sets all system parameters to the factory defaults. To perform an NVRAM initialization, turn the printer power off, then press and hold the J

OB CANCEL

button for 20 or more seconds after all of the LEDs come on. The NVRAM initialization starts once the J

seconds). The control panel cycles the LEDs from front to back until the NVRAM initialization is complete.

button. Turn the printer power back on and continue to hold the JOB C

OB CANCEL

button is released (anytime after 20

ANCEL

54 Chapter 3 Printer Configuration C4170-90959

Remote Control Panel

The Remote Control Panel (RCP) lets users view and modify the printer's default settings from the computer. This is useful if DOS software applications are running that do not support some or all of the needed printer features.

Once the DOS RCP is installed, start it with the following command: At the DOS prompt, switch to the drive and directory where the RCP is located (by default

C:\HPLJUTIL), type RCP and press E

Installing the Remote Control Panel

The DOS Remote Control Panel may already be installed. If it is not, to install the DOS Remote Control Panel, follow these steps:

1 Be sure that the HP LaserJet printer and cables are set up and connected to the PC

according to the instructions in the

2 Make sure that the printer is plugged in and ready to print. 3 Insert the HP LaserJet DOS Utilities disk into the flexible disk drive (usually A: or B:). 4 At the DOS prompt, switch to the drive where the HP LaserJet DOS Utilities disk is

located (for example, A:). If installing from the CD-ROM, switch to the drive and directory where the DOS Utilities are located (for example, D:\ENGLISH\DOS).

NTER

HP LaserJet 2100 Printer User Guide

5 At the DOS prompt, type INSTALL and press E 6 Follow the instructions on the screen.

Once the DOS utilities are installed, run the installation program again with the following command: At the DOS prompt, switch to the drive and directory where the utilities are located (by default C:\HPLJUTIL), type INSTALL and press E

NTER

C4170-90959

Remote Control Panel

Network Printing

Installing an HP JetDirect EIO Card

1 Turn the printer off, and disconnect the power cord. 2 Open the interface cable door by pressing on the release tabs. Disconnect all interface

cables.

3 Locate the EIO Slot. Firmly insert the HP JetDirect EIO card into the EIO slot. Twist in

the retaining screws.

4 Attach the appropriate network cable to the EIO card. 5 Reinstall the interface cable(s) power cord. Reinstall the interface cable door. Turn the

printer on.

NOTE: Print a PCL configuration page to check that the HP JetDirect EIO card appears as an installed

option.

56 Chapter 3 Printer Configuration C4170-90959

IR Printing

The infrared (IR) port is located on the lower right corner of the printer. This port is compliant with the specifications determined by the Infrared Data Association (IrDA). On the right side of the IR port is a status light that indicates when the port is active. The IR port transmits data at speeds of up to 4 MB per second. When the IR connection is established, the IR status light comes on. If the connection is broken or when the print job is complete, the IR status light goes off.

The following is required to use the IR port:

• A computer or personal digital assistant (PDA) equipped with an IrDA-compliant port.

• An infrared port driver that allows printing from the computer to the printer using the IR port and the IrDA communication protocol.

• A printer driver to generate data for the printer.

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IR Printing

58 Chapter 3 Printer Configuration C4170-90959

Printer Maintenance

Contents

Service Check Points- - - - - - - - - - - - - - - - - - - 60 Cleaning the Printer - - - - - - - - - - - - - - - - - - - 61 Toner Cartridge Information- - - - - - - - - - - - - - - - 64

C4170-90959

Contents

Service Check Points

Periodic replacement parts are the parts that should be changed at regular intervals. Failure of these parts can seriously affect the printer’s performance. These parts should be replaced during a regular service visit closest to the end of the part’s expected life.

The following parts should be replaced after approximately 150,000 pages of use:

• Fusing Assembly

• Transfer Roller

• Separation Pads (Tray 1, Tray 2, and Tray 3)

• Pickup Rollers (Tray 1, Tray 2, and Tray 3)

• Output Feed Rollers (Upper and Lower)

• Transport Belts and Rollers

See Chapter 7: Removal and Replacement for procedures on removing and replacing these parts.

Variables such as media, environment, and usage can cause premature wear of these parts. See Chapter 2: Operating Requirements for information on suitable media, environment, and usage conditions.

60 Chapter 4 Printer Maintenance C4170-90959

Cleaning the Printer

To maintain print quality, f ollow the general cleaning procedure every time the toner cartridge is changed or whenever print quality problems occur. Keep the printer as free from dust and debris as possible.

General Cleaning

WARNING! Turn the printer off and unplug the power cable before cleaning the printer.

CAUTION: To prevent damage, do not expose the toner cartridge to light for more than a few minutes.

Place a piece of paper over the top of the toner cartridge to shield it while it is out of the printer.

• Clean the outside of the printer with a lightly water-dampened cloth.

• Clean the inside of the printer with a dry, lint-free cloth:

• Transfer Roller

• Tray 1 Pickup Roller

• Tray 1 Separation Pad

• Registration Shutter

• Transfer Guide Unit

• Feed Belt/Feed Guide Unit

• Fusing Assembly Entrance Guide

Do not use ammonia-based cleaners on or around the printer. While cleaning the printer, be careful not to touch the transfer roller’s sponge (located underneath the toner cartridge). Skin oils on the transfer roller’s sponge can cause print quality problems.

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Cleaning t he Printer

Internal Cleaning

During the printing process, paper, toner and dust particles can accumulate inside the printer. Over time, this buildup can cause print quality problems such as toner specks or smearing. This printer has two internal cleaning modes that can correct and prevent these types of problems.

Engine Cleaning

NOTE: For best results, use a transparency during this process. If a transparency is not available,

use copier grade paper and not bond or rough paper.

This process uses a transparency from Tray 1 to remove dust and toner from the paper path. Use this process if toner specks or dots appear on printouts. This process will provide a blank page which should be discarded.

NOTE: During the engine cleaning process, the printer pulls the transparency into the printer and

then stops . This is not a jam. The transparency will be slowly stepped through the printer to complete the engine cleaning.

Figure 4-1 Print Sample for Engine Cleaning

To Start Engine Cleaning

1 Make sure the printer is turned on and in the ready state. Load a transparency in Tray 1. 2 Press and hold the G

10 seconds. Release the buttons when the lights flash.

3 Press the G 4 Discard the blank page produced from the engine cleaning process.

button.

and JOB C

buttons until all lights flash. This will take about

ANCEL

62 Chapter 4 Printer Maintenance C4170-90959

Toner Cartridge Cleaning

This process cleans the photosensitive drum inside the toner cartridge. Use this process if blurred, faded or smeared printouts occur. This process takes about 10 minutes.

Figure 4-2 Print Sample for T oner Cartridge Cleaning

NOTE: Make sure the toner cartridge is not empty when using this process. This process consumes

toner and if used often can reduce toner cartridge life. A nearly empty toner cartridge might also cause print defects.

To Start Toner Cartridge Cleaning

1 Make sure the printer is turned on and in the ready state. 2 Press and hold the G

and JOB C

buttons until all lights flash. This will take about

ANCEL

10 seconds. Release the buttons when the lights flash.

3 Press the J

OB CANCEL

button.

To stop the toner cartridge cleaning process, turn the printer off.

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Cleaning t he Printer

Toner Cartridge Information

Toner cartridges contain components which are sensitive to light, temperature, and humidity. Make sure the user follows the recommendations in this section to ensure the highest quality and longest life of HP toner cartridges.

Storage

The toner cartridge (C4096A) should not be removed from its package until installation. The shelf life of a cartridge in an unopened package is approximately 2.5 years. The shelf life of a cartridge in an opened package is approximately 6 months. The expiration date of the toner cartridge is stamped on the cartridge box.

If cartridges are stored, the storage environment should meet the conditions listed in the following table:

Table 4-1. Storing Toner Cartridges

Category Temperature Humidity

Operating 10 to 32.5 degrees C

(50 to 90.5 degrees F)

Storage -20 to 40 degrees C

(-4 to 104 degrees F)

If the toner cartridge must be removed from the printer, always store the cartridge as follows:

• Inside the protective bag in which it was originally packaged.

• In a dark cabinet, away from direct sunlight.

• Correct side up and in a horizontal position (not standing on end).

• In a temperature listed in the table above.

• Away from ammonia or other organic solvent fumes.

CAUTION: Never ship the printer with a toner cartridge installed. Excessive vibration during shipping can

cause toner to leak, contaminating the printer. Never e xpose the toner cartridge to direct sunlight, or to room light for more than a few minutes.

Bright light and direct sunlight can permanently damage a toner cartridge.

35 to 85% RH

15 to 90% RH

64 Chapter 4 Printer Maintenance C4170-90959

Handling Instructions

• Before installing a cartridge, evenly distribute the toner. See “Redistributing the Toner” (page 68) for instructions.

• Do not touch the surface of the photosensitive drum in the cartridge. Protect the drum from light and contamination.

• Do not expose the cartridge to unnecessary vibrations or shock.

• Do not expose the photosensitive drum to strong light. Blurred areas on the page might indicate that the drum has been exposed to light for too long. This causes permanent damage to the photosensitive drum. Replace the cartridge.

• Never manually rotate the drum, especially in the reverse direction; it can cause internal damage and toner spills.

Cleaning Spilled Toner

Defective toner cartridges can develop leaks. In addition, after a paper jam has occurred, some toner might remain on the rollers and guides inside the printer. The pages that print immediately after the jam might pick up this toner.

To clean skin and clothing if toner spills, remove as much toner as possible with dry tissue, then wash with cold water. Hot water causes toner to permanently set into clothing.

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Toner Cartridge Information

Refilled Toner Cartridges

HP Policy on Non-HP Toner Cartridges

Hewlett-Packard Company cannot recommend use of non-HP toner cartridges, either new, refilled, or remanufactured. Because they are not HP products, HP cannot influence their design or control their quality.

While Hewlett-Packard Company does not prohibit the use of refilled toner cartridges during the warranty period or while under a maintenance contract, we do not recommend their use for the following reasons:

• Hewlett-Packard has no ability to ensure that a refilled toner cartridge functions at the high level or reliability of a new HP toner cartridge. Hewlett-Packard also cannot predict the long term effect of the different toner formulations found in refilled cartridges.

• Hewlett-Packard has no control over the print quality of a refilled toner cartridge. The print quality of HP toner cartridges influences the customer’s perception of the printer.

• Repairs resulting from the use of refilled toner cartridges may not be covered under the HP warranty or maintenance contract.

Recycling Toner Cartridges

In many countries, this product’s printing supplies (e.g., toner cartridge, drum, fuser) can be returned to HP through the HP Planet Partners Printing Supplies Environmental Program. An easy-to-use takeback component of the program is available in over 20 countries. Multilingual program information and instructions are included in every new HP LaserJet Toner Cartridge and Consumables box.

For more information, call (1) (800) (340-2445) (U.S. Only) or visit the HP LaserJet Supplies website:

U.S.:http://www.hp.com/ljsupplies/environment_main.html Europe: http://www.hp.com/pays/eur_supplies/english/planetpartners

Non-US customers should call the local HP Sales and Service Office for further information regarding availability of the HP Planet Partners Printing Supplies Environmental Program.

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Toner Cartridge Weights

The weight of a toner cartridge when full and empty is as follows:

Full: 1130 grams (39.86 oz) Empty: 925 grams (3 2.63 oz)

Toner Cartridge Life Expectancy

The life of the toner cartridge depends on the amount of toner used in each print job. When printing text at 5% coverage, an HP LaserJet 2100 toner cartridge lasts an average of 5,000 pages. This assumes the default print density setting and EconoMode is off (default settings).

Saving Toner with EconoMode

Toner cartridge usage can be extended by using the printer’s EconoMode feature. EconoMode can be turned on or off through the driver or HP LaserJet Configuration Utility.

• EconoMode functions in portrait orientation only.

• EconoMode does not function at 1200 dpi.

• Some software applications might refer to EconoMode as “draft mode.”

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Toner Cartridge Information

Redistributing the Toner

When toner is low, faded or light areas may appear on a printed page. To temporarily improve print quality, redistribute the toner. The cartridge will need to be replaced soon. To redistribute toner:

WARNING! Avoid reaching too far into the printer. The adjacent fusing area may be hot.

1 Remove the toner cartridge from the printer. 2 Rotate the toner cartridge and gently shake from side to side to redistribute the toner.

(Do not tip the cartridge on end, or it might leak.) If toner gets on clothing, wipe it off with a dry cloth and wash clothing in cold water. (Hot

water sets toner into fabric.)

CAUTION: To prevent damage, do not expose the toner cartridge to light for more than a few minutes.

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Functional Overview

Contents

Sequence of Operation- - - - - - - - - - - - - - - - - - 70 Timing Diagram - - - - - - - - - - - - - - - - - - - - - 72 Printer Functionality and Operation - - - - - - - - - - - - 73 Engine Control System - - - - - - - - - - - - - - - - - - 79 Paper Pick and Feed System - - - - - - - - - - - - - - - 89

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Contents

Sequence of Operation

The formatter system and the Engine Controller Assembly system share information during printer operation. The Engine Controller Assembly-Intermediate PCB-Formatter connector forms a link which operates as a data bus. This lets printer status, command information, and dot-image data to be passed between the two systems. The events described in the table below and shown in “Timing Diagram” (page 72) take place during normal printer operation.

Table 5-1. Print Period Descriptions (see “Timing Diagram” (page 72))

Period Timing Purpose

WAIT From the time power is switched on to

the end of the main motor’s initial rotation.

Standby (STBY)

Initial Rotation (INTR)

PRINT From the end of the INTR period until 2

Last Rotation (LSTR)

From the end of the WAIT period until the input of the PRINT signal from the Formatter. OR: From the end of the Last Rotation period until either the input of the PRINT signal from the Formatter or the power is switched off.

From the i nput of th e PRINT signa l from the Formatter until the paper reaches the top-of-page sensor.

seconds after the top-of-page sensor detects the trailing edge of the paper.

From the completion of printing until the main motor stops rotating.

Returns to the INTR period if the Formatter sends another PRINT si gnal. Otherwise, returns to the STBY period.

Clears the drum surface potential and cleans the Transfer Roller.

Also detects whether or not the toner cartridge is installed.

Maintains the printer in a ready state.

Stabilizes the sensitivity of the photosensitive drum in preparation for printing.

Forms images on the photosensitive drum based on the /VDO signal from the Formatter and transfers the image to the paper.

Delivers the last sheet of paper. Also cleans the Transfer Roller.

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Power On Sequence

The sequence from power on until the printer enters the STBY period is as follows:

1 Power on. 2 CPU initialization. 3 Video interface communication start. 4 Fusing heater drive. 5 Main motor and fan drive.

Determines the paper detection status of each sensor in the printer immediately before driving the main motor, and assesses a paper jam if residual paper is detected.

6 High voltage control.

Determines whether or not the toner cartridge is installed, and if so cleans the transfer charging roller after the primary charging AC bias is turned on.

7 Residual paper check.

After starting the main motor, checks again for residual paper in the printer. If it finds paper, the printer assesses a paper jam or automatically delivers the residual paper according to the situation.

8 Failure/abnormality check.

In the steps above, the printer detects any door open condition, fan motor failure, or fusing assembly failure when they occur.

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Sequence of Operation

Timing Diagram

Figure 5-1 Timing Diagram

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Printer Functionality and Operation

There are four major systems that make up the HP LaserJet 2100 printer and allow it to operate. Each system works independently to accomplish its task, but must be coordinated with the other systems to successfully produce a printed page. Understanding these systems, their function, and how they interact with each other is the key to troubleshooting any problem. Detailed information regarding the troubleshooting of the HP LaserJet 2100 is included in Chapter 6: Troubleshooting.

The HP LaserJet 2100 printer’s four major systems are as follows:

• “Formatter System” (page 74) - Receives print data from the host, processes the image, and transfers it to the Engine Control System. The Formatter System also provides the interface between the user and the printer (Control Panel).

• “Engine Control System” (page 79) - Monitors and controls all of the printer’s mechanical and electrical subsystems. It is the center of the printer’s operation.

• “Image Formation System” (page 82) - Produces the actual physical image on the page.

• “Paper Pick and Feed System” (page 89) - Moves paper or other print media through the printer from one of the selected input trays (T ra y 1, 2, or 3) to the selected output bin (top or rear).

Figure 5-2 Printer Functionality Divided into Systems

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Printer Functionality and Operation

Formatter System

The Formatter System is responsible for the following:

• Receiving and processing data from the various printer interfaces.

• Monitoring control panel input and relaying printer status information (through the control panel and the I/O).

• Developing and coordinating data placement and timing with the print engine.

• Storing font information and macros.

• Communicating with the host computer.

The Formatter receives data from the I/O and converts it into a dot image. The Formatter then sends a PRINT signal to the Engine Controller Assembly. The Engine Controller Assembly synchronizes the Image Formation System with the Paper Feed System, and signals the Formatter to send the print image data. The Formatter sends the print image data (dots) in the form of a VIDEO signal and the printing process begins.

Figure 5-3 Formatter System Block Diagram

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Formatter Hardware

The formatter system contains the following:

• CPU. 66 MHz Intel 80960JD with a 33 MHz bus.

• Read Only Memory (ROM). Stores the dot patterns of internal character sets (fonts) in addition to storing microprocessor control programs.

• Random Access Memory (RAM). Stores printing and font information received from the host system, and can also serve to temporarily store a full page of print image data before the data is sent to the print engine. Note that adding memory will not increase I/O buffer space or cause the printer to print more pages per minute.

• Non-Volatile Memory (NVRAM). Stores information about the I/O and print environment configuration. The printer keeps the contents of NVRAM when the power is turned off or disconnected. (As in other HP LaserJet printers, downloaded fonts and macros are saved in conventional RAM and are lost when power is turned off.)

•Interfaces

• Parallel Interface. Receives incoming data through its IEEE1284 B interface

connector. The IEEE1284 B interface provides high-speed, two-way communication between the printer and the host, letting the user change printer settings and monitor the printer’s status from the host computer.

• LocalTalk I/O. Implements the AppleTalk networking protocol through the LocalTalk

hardware. The LocalTalk network cable (HP P/N 92215N) is connected through an 8pin DIN connector on the printer's I/O panel.

• EIO. PCI-based Enhanced Input/Output (EIO) slots support a wide range of print

servers and other add-on devices. HP JetDirect EIO cards provide high-speed communication for network printing over Ethernet, Ethernet and LocalTalk, Token Ring, or Fast Ethernet networks.

Formatter Subsystems/Features

Resolution Enhancement technology (REt - 600 dpi only)

• Contains circuitry for Resolution Enhancement technology (REt), which modifies the standard video dot data on its way to the Engine Controller Assembly to produce smoothed black-to-white boundaries. The default is On.

Print Density Adjustment

• Affects the line width (boldness) of the print image. This is accomplished by varying the developer DC bias, which controls the amount of toner applied to the photosensitive drum. Settings range from 1 (lightest) to 5 (darkest). The default is 3.

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Formatter Subsystems/Features

EconoMode (600 dpi only)

• Uses approximately 50% less toner than standard mode printing by reducing the dot density. Users can adjust EconoMode, which can also be thought of as draft mode, through software applications. The default setting is Off. EconoMode does not affect print speed or memory usage.

Figure 5-4 EconoMode Printing Versus Standard Mode Printing

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Memory Management

This printer uses various methods to conserve and make the most of available memory. Several of these methods are explained below.

Memory Enhancement techn ology (MEt)

MEt enhances the printer's standard memory through a variety of font and data compression methods. MEt also automatically compresses fonts for desktop publishing applications. MEt is available in all printing modes (PCL 5e, PCL XL,and HP PS emulation). When printing graphics, MEt analyzes each page as it is being printed and automatically applies a variety of compression techniques to print the complete page at the correct resolution.

Image Adapt

Image Adapt uses a compression technique to allow printing of full-page graphics using the printer's base memory. Image Adapt is only used in PCL 5e (PCL XL and HP PS emulation do not require Image Adapt). The available settings are Auto, On, and Off. The default is Auto.

If Image Adapt is used some data may be lost. To see if there has been some loss of graphic detail, print a self test page and check the Image Adapt Used line in the Printer Information section. If the printer invoked Image Adapt since the last time the self test was printed (or the last time the printer was turned off and on), that line reads "Image Adapt Used: Yes."

Page Protect

A page's complexity (rules, complex graphics, or dense text) may exceed the printer's ability to create the page image fast enough to keep pace with the engine's printing process. If a page is too complex, it may print in parts (for example, the top half of data on one page and the bottom half on the next page). Some print data loss is likely in these instances, and the printer's Error light flashes.

Page Protect allows the Formatter to create the entire page image in memory before moving the paper through the printer. This process ensures that the entire page is printed. The default is off, which provides the best performance. Page Protect should only be enabled when necessary.

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Formatter Subsystems/Features

Printer Job Language (PJL) Overview

Printer Job Language (PJL) is an integral part of the printer’s configuration, in addition to the standard Printer Command Language (PCL). PJL allows the printer to perform functions such as:

• Two-way communication with the host computer through an IEEE1284 B interface connection. The printer can tell the host such things as the control panel settings and allow the control panel settings to be set from the host.

• Dynamic I/O switching allows the printer to be configured with a host on each I/O. The printer can receive data from more than one I/O simultaneously until the buffer is full. This can occur even when the printer is offline.

• Context-sensitive switching allows the printer to automatically recognize the personalities (PostScript or PCL) of each host and configure itself to serve that personality.

• Isolating print environment settings from one print job to the next. For example, if a print job is sent to the printer in landscape mode, subsequent print jobs only print in landscape if they are formatted for landscape printing.

For more information, see the 5021-0377). The complete PJL Status Code listing is contained in the appendix of the

Printer Job Language Technical Reference

Software Technical Reference Documentation

. Also see HP’s web site at www.hp.com.

(Part Number

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Engine Control System

The engine control system shown in figure 5-5 consists of the Engine Controller Assembly and the Intermediate PCB. The Engine Controller Assembly coordinates all print engine activities.

Figure 5-5 Engine Control System

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Specifically, the Engine Control System directly controls the following subsystems contained on the Engine Controller Assembly:

• Laser Scanner Control

• Paper Feed Control

• Microswitch Control

• Motor Control

• Fusing Assembly Control

• Power Supply and Control

Engine Control System

NOTE: The Intermediate PCB is only a connection point to the Engine Controller Assembly. Before

replacing the Engine Controller Assembly, make sure that the Intermediate PCB is not damaged and that the connections are correct.

Laser Scanner Control

Based on information received from the Engine Controller Assembly, the formatter sends a signal directly to modulate the laser diode on and off. The modulated laser beam strikes the surface of a rotating scanning mirror, then a focusing lens directs the beam onto the photosensitive drum.

The printing system synchronizes the process by continuously monitoring the beam detect signal.

Paper Feed Control

The Engine Controller Assembly controls paper motion by continuously monitoring the various paper sensor levers, and coordinating the timing with the other print processes and systems. See “Paper Pick and Feed System” (page 89) for more information.

Microswitch Control

The Engine Controller Assembly controls the following microswitches and reports any errors to the Formatter:

• Top door and toner cartridge (SW1701). Activated if the top door is open. The toner cartridge is detected electronically.

• Engine test (SW701). Activated manually through an access hole on the rear of the printer. This switch causes the print engine to perform a self test diagnostic, bypassing the formatter. See “Engine Test” (page 108).

Motor Control

The Engine Controller Assembly controls the following motors and reports any failures to the formatter. See “Sequence of Operation” (page 70) for more information on timing periods.

• Main motor. Rotates during Interim period (following initial power on), Print, and Last Rotation, or when the top cover is opened or closed.

• Scanner motor. Operates during the Interim period and the Print period.

• Fan motor. Rotates at full speed while the main motor is rotating and continues rotating for 30 seconds after the main motor stops. Rotates at full speed, half speed, and then stops during power on and the Standby period.

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Fusing Assembly Control

The fusing assembly’s film contains a heater. The Engine Controller Assembly controls the fusing heater during the following temperature modes. See “Sequence of Operation” (page 70) for more information on print period descriptions.

•Initial

•Print

• Between-Page

• Postprint

The Engine Controller Assembly maintains a temperature of about 195 degrees Celsius (383 degrees Fahrenheit) during print temperature mode. If the fusing system overheats (about 220 degrees Celsius; 428 degrees Fahrenheit), a relay (RL301) opens the power circuit to the fusing heater, causing a Fuser Error message. If the fusing system exceeds about 230 degrees Celsius (446 degrees Fahrenheit), the thermal fuse (FU1131) melts, cutting off power to the fuser assembly. The Engine Controller Assembly monitors the fusing heater temperature via a thermistor (TH701).

Power Supply and Control

• AC power is supplied to the low-voltage power supply circuit when the power switch is turned on. This circuit supplies DC voltage (+24V, +5V, +3.3V) to the Main Motor, Laser Scanner Unit, Interlock Switch, Video Controller, Solenoids, Paper Feeder , High-Voltage Power Supply, and Formatter.

• Opening the top cover interrupts the DC voltage supplied to the high-voltage power supply circuit.

• The low-voltage power supply circuit contains an overcurrent/overvoltage protection circuit that automatically turns off the output voltage when an overcurrent condition occurs because of a short or abnormal voltage on the load side.

• The protection circuit automatically resets after the input power is turned off then on. The low-voltage power supply circuit also contains a fuse that shuts off the power supply to the circuit when overcurrent conditions occur. See “Engine Control System” (page 79) for more information.

In response to the Engine Controller Assembly, the high-voltage power supply circuit (see figure 5-5) supplies DC and AC voltage to the various parts of the Image Formation System.

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Engine Control System

Image Formation System

The image formation process consists of six stages:

1. Drum Cleaning 4. Developing

2. Primary Charge 5. Transfer and Separation

3. Laser Beam Exposure 6. Fusing

Figure 5-6 Image Formation System Block Diagram

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Toner Cartridge

Figure 5-7 Toner Cartridge Components

The toner cartridge contains the cleaning, conditioning, and developing stages of the image formation process. These components are subject to wear and are built into the replaceable toner cartridge. This eliminates the need for a service call when replacement is required.

Photosensitive Drum

Figure 5-8 Photosensitive Drum

The photosensitive drum is the heart of the image formation system. This drum’s special properties allow an image to form on the drum's surface and then transfer to paper. The drum is an aluminum cylinder coated with an organic-photoconductive material (OPC). The photosensitive drum’s aluminum base is electrically connected to ground. The OPC material becomes electrically conductive when exposed to light. Areas not exposed to light remain nonconductive and maintain their negative charge.

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Image Formation System

Cleaning Stage

Figure 5-9 Cleaning the Photosensitive Drum

At the cleaning stage, the photosensitive drum's surface is prepared to hold an image. During printing, the drum rotates completely several times per printed page. Before forming the image for a given section of print, a cleaning blade removes toner from the previous rotation of the drum. The toner cartridge stores waste toner and prevents it from being used in later print jobs (see figure 5-9).

Conditioning Stage

Figure 5-10 Primary Charging Roller

At the Conditioning Stage, the primary charging roller applies a uniform negative charge on the photosensitive drum’s surface. The primary charging roller erases any residual charges and maintains a constant potential on the drum’s surface. In addition, the primary charging roller creates a uniform negative potential on the drum's surface.

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Writing Stage

Figure 5-11 Laser Scanner System

At the Laser Scanner, a laser beam focuses onto the photosensitive drum and discharges the drum's negative potential. This creates a latent electrostatic image, which later is developed into a visible image.

A small laser diode beam shines onto a rotating, 6-sided mirror. As the mirror rotates, the beam reflects off the mirror and sweeps the page from left to right.

A set of lenses and mirrors focuses the horizontal sweeping beam through the beam access slot in the rear of the toner cartridge and onto the photosensitive drum. Because the beam sweeps the entire length of the drum while the drum rotates, the entire circumference of the drum can be covered. Each successive sweep of the beam is offset 1/1200th of an inch. This is how the printer achieves its 1200 dpi resolution.

At the beginning of each sweep (before the beam reaches the drum), the beam detect mirror reflects the beam. The momentary pulse of light goes to the Engine Controller Assembly, which converts the light to an electrical signal used to synchronize other activities in the printer and to diagnose problems with the laser scanner assembly.

Portions of the drum not exposed to the laser still contain the uniform negative potential (placed there by the primary charging roller), but those portions exposed to light have been discharged to ground to form the latent electrostatic image.

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Image Formation System

Developing Stage

Figure 5-12 Developing the Latent Electrostatic Image into a Visible Image

At the developing stage, the latent electrostatic image is developed into a visible image on the photosensitive drum. The developing cylinder consists of a metallic cylinder that rotates around a fixed magnetic core inside the toner cavity. Toner is a powdery substance made of black, plastic resin bound to iron particles, which the magnetic core of the developing cylinder attracts. A rubber blade brushes the toner on the developing cylinder to a uniform thickness.

NOTE: Charges in the photosensitive drum’s exposed areas are shown as positive in figure 5-12 even

though they are actually negative. This means that the photosensitive drum potential is higher than that of the developing cylinder.

To obtain a negative surface charge, the toner particles rub against each other and the developing cylinder which is connected to a negative DC supply . The discharged (grounded) areas of the drum exposed to laser light attract the negatively charged toner. The negatively charged (non-exposed) areas repel the toner. An AC potential is applied to the developing cylinder to decrease the attraction between the toner and the cylinder’s magnetic core and to increase the repelling action of toner against the areas of the drum not exposed to laser light. This AC potential improves density and contrast.

The print density setting (through the software) adjusts the developing cylinder’s DC bias to change the force of attraction between the toner and drum.

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Transferring Stage

Figure 5-13 Transferring the Toner Image on the Drum Surface to the Paper

At the transferring stage, the toner image on the photosensitive drum's surface is moved to the paper. The transfer roller applies a positive charge to the back of the paper, causing the paper to attract the negatively charged toner on the drum's surface.

The drum’s small radius combined with the stiffness of the paper causes the paper to peel away from the drum. The Static Charge Eliminator helps separate the paper from the drum by weakening the attractive forces between the negatively charged drum surface and the positively charged paper. Without this help, thin paper might wrap around the drum. The Static Charge Eliminator also prevents droplets on the printed image at low temperature and humidity. After separation, the paper moves to the fusing station and the drum rotates to the cleaning and conditioning stations.

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Image Formation System

Fusing Stage

Figure 5-14 Fusing Film and Pressure Roller

At the fusing stage, heat and pressure fuse the toner to the paper to produce a permanent image. The paper passes between a fusing film and a pressure roller. The fusing film melts the toner while the pressure roller compresses it into the paper.

To prevent the toner from getting dispersed during the fusing stage, this printer applies a negative DC voltage to the fusing film via the pressure roller shaft (which is merely a continuity path). A negative charge is applied to the surface of the paper, which improves the adhesion force of the toner particles to the paper and prevents dispersion of the toner particles.

The fusing heater comes up to fusing temperature very quickly and thus does not require any power while the printer is on STBY. This feature saves power while virtually eliminating the warm-up period (less than 10 seconds).

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HP laserjet 2100 schematic

Specifications and Main Features

Frequently Asked Questions

User Manual