HP 4050, 4000 Service Manual

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HP LaserJet 4000 and 4050 Series Printers Service Manual

HP LaserJet 4000 and 4050 Series Printers

Service Manual _____________

Publication number C4251-91003

First edition, April 1999

Warranty

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

Hewlett-Packard makes no warranty of any kind with respect to this information. HEWLETT-PACKARD SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

Hewlett-Packard shall not be liable for any direct, indirect, incidental, consequential, or other damage alleged in connection with the furnishing or use of this information.

Trademark Credits

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PostScript

is a trademark of Adobe Systems Incorporated which may be registered in certain jurisdictions.

™

CompuServe

is a U.S.

trademark of CompuServe, Inc. Windows

is a U.S. registered trademarks of Microsoft Corporation.

™

TrueType

is a U.S. trademark of Apple Computer, Inc.

NERGY STAR

is a U.S. registered service mark of the U.S. EPA.

Hewlett-Pack ard Company 11311 Chinden Boulevard Boise, Idaho 83714 USA

1 Printer Description

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Printer Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Identification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

Model and Serial Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

Site Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9

Space Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10

Environmental Requirements . . . . . . . . . . . . . . . . . . . . . . . . 1-11

Paper Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12

Supported Types of Paper. . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15

Guidelines for Using Paper . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16

Labels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19

Transparencies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19

Envelopes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20

Card Stock and Heavy Paper . . . . . . . . . . . . . . . . . . . . . . . . 1-23

Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24

Laser Safety Statement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24

Canadian DOC Regulations . . . . . . . . . . . . . . . . . . . . . . . . . 1-24

FCC Regulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25

Laser Statement for Finland . . . . . . . . . . . . . . . . . . . . . . . . . 1-26

Toner Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-27

Environmental Product Stewardship . . . . . . . . . . . . . . . . . . . 1-28

2 Service Approach

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Service Approach. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Parts and Supplies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Helpful Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Phone Numbers for Ordering. . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Exchange Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Consumables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

World Wide Web . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

HP Service Parts Information Compact Disc. . . . . . . . . . . . . . 2-6

HP Support Assistant Compact Disc . . . . . . . . . . . . . . . . . . . . 2-7

HP FIRST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

Toner Cartridge Information. . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

Warranty Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

Contents-1

3 Printer Operation

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Using the Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Control Panel Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Control Panel Lights. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Control Panel Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Settings and Defaults. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Control Panel Menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

Quick Copy Jobs Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

Private/Stored Jobs Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

Information Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8

Paper Handling Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

Print Quality Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12

Printing Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15

Configuration Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-20

I/O Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-26

EIO Menu (Networked Printers). . . . . . . . . . . . . . . . . . . . . . . 3-29

Resets Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-31

Service Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-32

Service Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-33

Setting the Page Count, Maintenance Count, and

Serial Number. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-33

Cold Reset Paper. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-36

Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-36

Clear Event Log. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-36

Testing the Printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-37

Resetting the Printer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-38

System Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-39

MS-DOS System Configuration. . . . . . . . . . . . . . . . . . . . . . . 3-39

Parallel DOS Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-39

Serial MS-DOS Commands. . . . . . . . . . . . . . . . . . . . . . . . . . 3-40

Printer I/O Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-41

Parallel Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-41

Serial Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-41

Contents-2

4 Printer Maintenance

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Cleaning the Printer and Accessories . . . . . . . . . . . . . . . . . . . . . . 4-2

Cleaning Spilled Toner. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

Preventative Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

Reset Maintenance Count . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

Expected Life of Components . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

5 Functional Information

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Power Supply System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

AC/DC Power Distribution . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

Overcurrent Overvoltage Protection . . . . . . . . . . . . . . . . . . . . 5-3

High-voltage Power Distribution . . . . . . . . . . . . . . . . . . . . . . . 5-4

Toner Cartridge Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5

Engine Controller System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6

Engine Controller Board Inputs and Outputs. . . . . . . . . . . . . . 5-8

Laser and Scanner Drive. . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12

Paper Motion Monitoring and Control . . . . . . . . . . . . . . . . . . 5-12

Solenoids, Sensors, Clutches, and Switches . . . . . . . . . . . . 5-12

Engine Test Print. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12

Motors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-13

Formatter System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15

PowerSave . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15

Resolution Enhancement technology (REt). . . . . . . . . . . . . . 5-16

EconoMode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-16

Input/Output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-17

CPU. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-18

Printer Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-18

Random Access Memory (RAM). . . . . . . . . . . . . . . . . . . . . . 5-19

DIMM Slots . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-19

Page Protect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-20

PJL Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-20

PML . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-21

Control Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-21

Image Formation System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-22

Toner Cartridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-24

Photosensitive Drum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-25

Writing the Image. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-28

Developing the Image . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-29

Transferring the Image . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-30

Image Fusing/Variable Fusing Temperature . . . . . . . . . . . . . 5-31

Paper Feed System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-33

Clutches and Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-35

Printing from Tray 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-36

Printing from Tray 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-38

Printing from the Optional 500-sheet

Universal Tray . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-41

Envelope Feeder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-44

Duplexer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-46

Paper Jam . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-48

Basic Sequence of Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-49

Contents-3

6 Removing and Replacing Parts

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

Removal and Replacement Strategy . . . . . . . . . . . . . . . . . . . . . . . 6-2

Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3

Removing Covers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6

Rear Right Side Cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6

Top Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7

Left Side Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-12

Front Right Side Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-13

Rear Cover/Rear Output Bin . . . . . . . . . . . . . . . . . . . . . . . . . 6-14

Tray 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-15

Removing Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-18

Fuser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-18

Formatter Cage Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . 6-20

Output Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-21

Laser Scanner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-23

Fan. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-24

Main Motor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-25

Transfer Roller. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-26

Tray 1 Pickup Roller. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-27

Tray 1 Pickup Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-29

Right Side Toner Cartridge Guide . . . . . . . . . . . . . . . . . . . . . 6-33

Registration Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-34

Paper Feed Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-36

Formatter Pan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-39

Gear Train . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-40

Delivery Drive Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-41

Separating the Engine Module from the Paper Feed Module . . . 6-42

Engine Controller Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-44

Paper Feed Rollers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-48

Separation Rollers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-49

Paper Feed Module Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-50

Paper Feed Module Gear Train Assembly. . . . . . . . . . . . . . . 6-51

Paper Feed Module Side Rails . . . . . . . . . . . . . . . . . . . . . . . 6-52

Lower Paper Feed Module Plate (HP LaserJet 4000 T/4000 TN

and 4050 T/4050 TN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-53

PCA Cover (HP LaserJet 4000 T/4000 TN and

4050 T/4050 TN). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-54

PCA Cover (HP LaserJet 4000/4000 N and 4050/4050 N) . . 6-55

PCA Controller. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-56

Contents-4

7 Troubleshooting

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

Troubleshooting Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2

Troubleshooting Flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4

Troubleshooting Flowchart (Continued). . . . . . . . . . . . . . . . . . 7-5

Troubleshooting the Printing System . . . . . . . . . . . . . . . . . . . . . . . 7-6

Preliminary Operating Checks. . . . . . . . . . . . . . . . . . . . . . . . . 7-6

Power On. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-7

Engine Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-11

Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-12

Event Log. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-13

Printer Messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-17

General Paper Path Troubleshooting . . . . . . . . . . . . . . . . . . 7-45

Information Pages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-48

Image Quality. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-54

Image System Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . 7-74

Interface Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-77

AUTOEXEC.BAT Standard Configurations. . . . . . . . . . . . . . 7-81

Reference Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-84

Locations of Components . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-84

Paper Path. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-90

Engine Controller Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-93

Paper Size Detection Switches . . . . . . . . . . . . . . . . . . . . . . . 7-94

Motors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-96

Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-97

PCAs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-100

Sensors and Thermistor . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-102

Solenoids and Clutch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-105

Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-108

Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-110

8 Parts and Diagrams

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1

How To Use the Parts Lists and Diagrams . . . . . . . . . . . . . . . . . . 8-2

Accessories and Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4

Common Screws and Replacement Cables . . . . . . . . . . . . . . 8-6

Illustrations and Parts Lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-8

Alphabetical Parts List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-58

Numerical Parts List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-67

Contents-5

Contents-6

Printer Description

Overview

This chapter discusses the following:

●

Printer Features

●

Identification

●

Site Requirements

●

Paper Specifications

●

Safety Information

Overview 1-1

Printer Features

Table 1-1. Printer Features for the HP LaserJet 4000 Series Printer

Speed 17 pages per minute (ppm)

100 MHz RISC microprocessor First page out = 15 sec.

Resolution

Typefaces

Memory Options HP LaserJet 4000/4000 T: 4 MB RAM standard

Mass Storage Options 2 and 4 MB Flash DIMMs

Interface Bidirectional IEEE 1284 compliant parallel interface

300 dpi with PCL5e/HP’s PostScript 600 dpi with PCL5e/PS HP FastRes 1200 (PCL6 only) HP ProRes 1200 at half engine speed (PCL6, PS)

110 Scalable TrueType and PCL accessible)

HP LaserJet 4000 N/4000 TN: 8 MB RAM standard Optional Memory:

4, 8, 16, and 32 MB EDO DIMMs 4, 8, 16, 32, and 64 MB SDRAM DIMM

Greater than 1 GB hard disk

RS-232 9-pin serial Paper Handling Connector (PHC) 10Base-T and 10Base-2 (HP LaserJet 4000 N/4000 TN) LocalTalk

(80 built-in, 30 via HP FontSmart, all PS

Level 2 emulation (PS)

Optional Networking 10Base-T and 10Base-2

10/100Base-TX Token Ring LocalTalk

Expansion Slots 3 100-pin DIMM slots

2 Enhanced I/O (EIO) slots

1-2 Printer Description

Table 1-1. Printer Features for the HP LaserJet 4000 Series Printer (continued)

Paper Trays 100-sheet Tray 1

●

Size: 3 by 5 in to legal (76 by 127 mm to 216 by 356 mm)

500-sheet Tray 2 (HP LaserJet 4000/ 4000 N)

●

Size: letter, legal, A4

250-sheet Trays 2 and 3 (HP LaserJet 4000 T/ 4000 TN)

●

Size: letter, A4, executive, legal, B5 (ISO), B5 (JIS), A5

Optional Universal 500-sheet Tray

●

Supports standard and custom sizes from 5.8 by 8.2 in (149 by 210 mm) to 8.5 by 14 in (216 by 356 mm).

Paper Path Straight through from Tray 1 to Rear Output Bin

or to Top Output Bin

Output Capacity 250-sheet Top Output Bin

50-sheet Rear Output Bin

Paper Handling Options Duplexer, Envelope Feeder, Optional 500-sheet Universal Tray

Assembly

Printer Features 1-3

Table 1-2. Printer Features for the HP LaserJet 4050 Series Printer

Speed 17 pages per minute (ppm)

133 MHz RISC microprocessor First page out = 15 sec. “RIP ONCE” capability with 16 MB or hard disk option

Resolution

300 dpi with PCL5e/HP’s PostScript

Level 2 emulation (PS) 600 dpi with PCL5e/PS HP FastRes 1200 (PCL6, PS) HP ProRes 1200 at engine speed (17 ppm) (PCL6, PS)

Typefaces

110 Scalable TrueType

(80 built-in, 30 via HP FontSmart, all PS and PCL accessible) Euro symbol

Memory Options HP LaserJet 4050/4050 T: 8 MB RAM standard

HP LaserJet 4050 N/4050 TN: 16MB RAM standard Optional Memory:

4, 8, 16, MB EDO DIMMs 4, 8, 16, 32, 64 MB SDRAM DIMM

Mass Storage Options 2 and 4 MB Flash DIMMs

Greater than 1 GB hard disk

Expansion Slots 3 100-pin DIMM slots

2 enhanced I/O (EIO) slots

Interface Bidirectional IEEE 1284-compliant parallel

10/100Base-TX (HP LaserJet 4050 N/4050 TN) HP Fast InfraRed Receiver (FIR) RS232 9-pin serial Paper Handling Connector (PHC)

Optional Networking 10Base-T and 10Base-2

10/100Base-TX Token Ring LocalTalk

1-4 Printer Description

Table 1-2. Printer Features for the HP LaserJet 4050 Series Printer (continued)

Paper Trays 100-sheet Tray 1

●

Size: 3 by 5 to legal (76 by 127 mm to 216 by 356 mm)

500-sheet Tray 2 (HP LaserJet 4050/ 4050 N)

●

Size: letter, legal, A4

250-sheet Trays 2 and 3 (HP LaserJet 4050 T/ 4050 TN)

●

Size: letter, A4, executive, legal, B5 (ISO), B5 (JIS), A5

Optional 500-sheet Universal Tray

●

Supports standard and custom sizes from 5.8 by 8.2 in (149 by 210 mm) to 8.5 by 14 in (216 by 356 mm).

Paper Path Straight through from Tray 1 to Rear Output Bin

or to Top Output Bin

Output Capacity 250-sheet Top Output Bin

50-sheet Rear Output Bin

Paper Handling Options Duplexer, Envelope Feeder, Optional 500-sheet Universal Tray

Assembly

Printer Features 1-5

Table 1-3. Comparison of HP LaserJet 4000 Series Printers

HP LaserJet

4000

Ethernet 10-T/ 10-2 LocalTalk

Max. # Input Bins 3434

Standard RAM 4 MB internal 4 MB internal 8 MB internal 8 MB internal

250-Sheet Tray not available 2 standard not available 2 standard

500-Sheet Tray standard not available standard not available

500-Sheet Universal Tray

> 1 GB EIO Drive optional optional optional optional

Envelope Feeder optional optional optional optional

optional optional standard standard

optional optional optional optional

HP LaserJet

4000 T

HP LaserJet

4000 N

HP LaserJet

4000 TN

Duplexer optional optional optional optional

1-6 Printer Description

Table 1-4. Comparison of HP LaserJet 4050 Series Printers

HP LaserJet

4050

Ethernet 10-T/ 10-2 LocalTalk

10/100 Base TX optional optional standard standard

Max. # Input Bins 3434

Standard RAM 8 MB internal 8 MB internal 16 MB internal 16 MB internal

250-Sheet Tray not available 2 standard not available 2 standard

500-Sheet Tray standard not available standard not available

500-Sheet Universal Tray

> 1 GB EIO Drive optional optional optional optional

optional optional optional optional

HP LaserJet

4050 T

HP LaserJet

4050 N

HP LaserJet

4050 TN

Envelope Feeder optional optional optional optional

Duplexer optional optional optional optional

HP Fast InfraRed Receiver (FIR)

optional optional standard standard

Printer Features 1-7

Identification

Model and Serial Numbers

The model number and printer serial number are listed on an identification label located under the top cover on the right side of the printer.

The model number is alphanumeric, such as C4253A for the HP LaserJet 4050 N printer.

The serial number contains information about the Country of Origin, the Revision Level, the Production Code, and Production Number of the printer. An example of a serial number is USBB123456.

The top label also contains power rating and regulatory information as shown in Figure 1-1.

Figure 1-1 Sample Label

1-8 Printer Description

Site Requirements

The following environmental specifications must be maintained to ensure the proper operation of the printer. Consider the following points before installing the printer:

●

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

●

Install on a hard, flat and continuous surface, with all four printer feet level. Do not install on carpet or other soft surfaces.

●

Ensure adequate power is supplied. Printer power requirements are listed in Table 1-5. (Uninterruptable power supplies (UPSs) are not recommended.)

●

Install where temperature and humidity is stable, aw a y from water sources, humidifiers, air conditioners, refrigerators, or other major appliances.

●

Install away from direct sunlight, open flames , or ammonia fumes. If the printer is placed near a window, make sure the window has a curtain or blind to block any direct sunlight.

●

Install with enough space around the printer for proper access and ventilation.

●

Install away from the direct flow of exhaust from air ventilation systems.

Table 1-5. Electrical Specifications for the HP LaserJet 4000 and 4050 Series Printers

Volts Frequency Amperes Watts (typical)

100-127 VAC±10% 50/60 Hz ± 3 Hz 8 A printing = 330 W

standby = 22 W PowerSave On = 20 W

NERGY STAR

(EPA E

220-240 VAC±10% 50/60 Hz ± 3 Hz 4 A printing = 330 W

standby = 22 W PowerSave On = 20 W

NERGY STAR

(EPA E

)

Site Requirements 1-9

Space Requirements

39.67 in (100.76 cm)

full length, trays and Rear Output Bin open

16.77 in (42.6 cm)

printer only, Rear Output Bin closed

15.4 in

(39.0 cm)

HP LaserJet

4000/4000 N and

4050/4050 N

18.5 in

(46.99 cm)

with cover open

13.3 in

(34.3 cm)

with cover closed

HP LaserJet

4000 T/4000 TN and

4050 T/4050 TN

20.1 in

(51.19 cm)

with cover open

Figure 1-2 Printer Dimensions

Printer Weight (without Toner Cartridge)

●

HP LaserJet 4000/4000 N and 4050/4050 N printers:

39.27 lb (17.85 kg)

●

HP LaserJet 4000 T/4000 TN and 4050 T/4050 TN printers:

45.66 lb (20.71 kg)

1-10 Printer Description

15.5 in

(38.5 cm)

with cover closed

Environmental Requirements

Table 1-6. Printer and Toner Cartridge Environmental Conditions

Item Operating Storage

Temperature 50-91° F (10-32° C) 32 to 95° F (0 to 35°C)

Relative Humidity 20-80% RH (with no

condensation)

Table 1-7. Acoustic Emissions (Per ISO 9296)

Printer State Sound Power

Printing, 17 pages per minute (ppm)

Printing, 8 ppm L

PowerSave L

= 6.6 bels (A)

wad

= 6.2 bels (A)

wad

= 0 bels (A)

wad

10% to 95% RH

Site Requirements 1-11

Paper Specifications

The following tables show paper specifications for the HP LaserJet 4000 and 4050 series printer.

Table 1-8. Paper Specifications, Tray 1

Supported

Dimensions* Weight Capacity**

Paper

Minimum Size (custom)

Maximum Size 8.5 by 14 in

Transparencies

Labels Thickness:

Envelopes 20 to 28 lb

* The printer supports a wide range of paper sizes. Check the printer software for supported sizes.

To print custom-size paper see the user’s guide. ** Capacity may vary depending on paper weight and thickness, and environmental conditions. *** Custom media must be fed short edge first (portrait).

3 by 5 in*** (76 by 127 mm)

(216 by 356 mm)

Same as minimum

and maximum paper

sizes listed above.

16 to 53 lb

(60 to 199 g/m

Thickness:

0.0039 in to 0.0045 in (0.099 to 0.114 mm)

0.005 in to 0.007 in (0.127 mm to

0.178 mm)

(75 to 105 g/m

)

100 sheets of 20 lb

(75 g/m2) paper

75 transparencies

50 labels

10 envelopes

Table 1-9. Paper Specifications, Tray 2 (HP LaserJet 4000/4000 N and 4050/4050 N)

Supported

Dimensions* Weight Capacity**

Paper

Letter 8.5 by 11 in

(216 by 279 mm)

A4 8.3 by 11.7 in

(210 by 297 mm)

Legal 8.5 by 14 in

(216 by 356 mm)

* The printer supports a wide range of paper sizes. Check the printer software for supported sizes. ** Capacity may vary depending on paper weight and thickness, and environmental conditions.

16 to 28 lb

(60 to 105 g/m

)

500 sheets of 20 lb

(75 g/m

50-100 transparencies

) paper

1-12 Printer Description

Table 1-10. Paper Specifications, Trays 2 and 3 (HP LaserJet 4000 T/4000 TN and 4050 T/4050 TN)

Supported

Dimensions* Weight Capacity**

Paper

Letter 8.5 by 11 in

(216 by 279 mm)

A4 8.3 by 11.7 in

(210 by 297 mm)

Executive 7.3 by 10.5 in

(191 by 267 mm)

Legal 8.5 by 14 in

(216 by 356 mm)

B5 (ISO) (custom***)

B5 (JIS)

A5 (custom***)

* The printer supports a wide range of paper sizes. Check the printer software for supported sizes. ** Capacity may vary depending on paper weight and thickness, and environmental conditions. *** To print custom-size paper see the user’s guide.

6.9 by 9.9 in (176 by 250 mm)

7.2 by 10 in (182 by 257 mm)

5.8 by 8.2 in (148 by 210 mm)

16 to 28 lb

(60 to 105 g/m

)

250 sheets of 20 lb

(75 g/m

) paper

50-100 transparencies

Paper Specifications 1-13

Table 1-11. Paper Specifications, Optional 500-Sheet Universal Tray

Supported

Dimensions* Weight Capacity**

Paper

Letter 8.5 by 11 in

(216 by 279 mm)

A4 8.3 by 11.7 in

(210 by 297 mm)

Executive 7.3 by 10.5 in

(191 by 267 mm)

Executive JIS (custom ***)

16K (custom ***) 7.75 by 10.75 in

Legal 8.5 by 14 in

B5 (ISO) (custom***)

B5 (JIS) 7.2 by 10 in

A5 (custom***) 5.8 by 8.2 in

Custom*** 5.8 by 8.2 in

8.5 by 13 in (216 by 330 mm)

(197 by 273 mm)

(216 by 356 mm)

6.9 by 9.9 in (176 by 250 mm)

(182 by 257 mm)

(148 by 210 mm)

to 8.5 by 14 in (149 by 210 mm to 216 by 356 mm)

16 to 28 lb

(60 to 105 g/m

500 sheets of 20 lb

)

(75 g/m

50-100 transparencies

) paper

1-14 Printer Description

Table 1-12. Paper Specifications, Optional Envelope Feeder

Supported

Dimensions* Weight Capacity**

Paper

Minimum Size 3.5 by 6.3 in

(90 by 160 mm)

Maximum Size 7 by 10 in

20 to 28 lb

(75 to 105 g/m

)

75 envelopes

(178 by 254 mm)

* The printer supports a wide range of paper sizes. Check the printer software for supported sizes. ** Capacity may vary depending on paper weight and thickness, and environmental conditions.

Table 1-13. Paper Specifications, Optional Duplex Printing Accessory (Duplexer)

Dimensions Weight Capacity

Letter 8.5 by 11 in

(216 by 279 mm)

A4 8.3 by 11.7 in

(210 by 297 mm)

Executive 7.3 by 10.5 in

(191 by 267 mm)

Legal 8.5 by 14 in

(216 by 356 mm)

B5 (JIS) 7.2 by 10 in

(182 by 257 mm)

16 to 28 lb

(60 to 105 g/m

)

not applicable

Supported Types of Paper

The printer supports the following types of paper:

●

plain

●

letterhead

●

prepunched

●

bond

●

color

●

rough

●

preprinted

●

transparency

●

labels

●

recycled

●

card stock

●

user-defined (5 types)

Paper Specifications 1-15

Guidelines for Using Paper

For best results, use conventional 20 lb (75 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.

If you are unsure what type of paper you are loading (such as bond or recycled), check the label on the package of paper.

Some paper causes print quality problems, jamming, or damage to the printer.

Table 1-14. Guidelines for Using 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

Increased gray background shading.

Excessive curl. Problems with feeding.

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

Problems with feeding. Ragged edges. Use quality paper.

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

Too heavy. Use lighter paper.

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

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

moisture-proof wrapping.

Open the Rear Output Bin.

Open the Rear Output Bin. Use long-grain paper.

or perforations.

1-16 Printer Description

Note Do not use letterhead paper that is printed with low-temperature inks,

such as those used in some types of thermography. Do not use raised letterhead. The printer uses heat and pressure to fuse Toner to the paper. Make

sure that any colored paper or preprinted forms use inks that are compatible with the printer’s temperature (400°F or 205° C).

Avoid using paper that has already been used in a printer or copier. Do not print on both sides of envelopes, transparencies, or labels.

Paper Specifications 1-17

Paper Weight Equivalence Table

Use this table to determine approximate equivalent points in weight specifications other than U.S. bond w eight. For e xample, to determine the equivalent of 20 lb U.S. bond weight paper in U.S. cover weight, locate the bond weight (in the third row , first column) and scan across the row to the cover weight (in the third column). The equivalent is 28 lb.

Shaded areas indicate a standard weight for that grade.

Table 1-15. Paper Weight Equivalence

Bond wt.

(17x22)

Text/book

(25x38)

16# 41# 22# 27# 33# 37# 60 g/m 17# 43# 24# 29# 35# 39# 20# 50# * 28# 34# 42# 46# 75 g/m 21# 54# 30# 36# 44# 49# 24# 60# * 33# 41# 50# 55# 90 g/m 27# 68# 37# 45# 55# 61# 28# 70# * 39# 49# 58# 65# 105 g/m 29# 74# 41# 50# 61# 68# 32# 80#* 44# 55# 67# 74# 120 g/m 36# 90# 50# 62# 75# 83# 135 g/m 39# 40# 101# 55# 68# 83# 92# 43# 110# 45# 115# 63# 77# 94# 104# 47# 119# 51# 128# 70# 86# 105# 117#

Cover wt.

wt.

100# 55# 67# 82# 91# 148 g/m

(20x26)

Bristol wt.

(22.5x

28.5)

60# 74# 90# 100# 163 g/m

65# 80# 97# 108# 176 g/m

Index wt.

(25.5x

30.5)

Tag wt. (24x36)

Metric wt. Bond wt.

64 g/m

80 g/m

100 g/m

110 g/m

150 g/m

170 g/m

190 g/m

2 2 2 2 2

2 2 2 2 2 2 2 2 2 2 2

* U.S. postcard measurements are approximate. Use for reference only.

(17x22)

Text/book

(25x38)

16# 41# 22# 17# 43# 24# 20# 50# * 28# 21# 54# 30# 24# 60# * 33# 27# 68# 37# 28# 70# * 39# 29# 74# 41# 32# 80# * 44# 36# 90# 50# 39# 100# 55# 40# 101# 55# 43# 110# 60# 45# 115# 63# 47# 119# 65# 51# 128# 70#

wt.

Cover wt.

(20x26)

1-18 Printer Description

Labels

CAUTION To avoid damaging the printer, use only labels recommended for use

in laser printers. If you have problems printing labels, use Tray 1 and open the Rear

Output Bin. Never print on the same sheet of labels more than once.

Label Construction

When selecting labels, consider the quality of each component:

● Adhesives: The adhesive material should be stable at 400° F

(205° C), the printer’s maximum temperature.

● Arrangement: Only use labels with no exposed backing between

them. Labels can peel off of sheets that have spaces between the labels, causing serious jams.

● Curl: Prior to printing, labels must lie flat with no more than 0.5 in

(13 mm) of curl in any direction.

● Condition: Do not use labels with wrinkles, bubbles, or other

indications of separation.

Transparencies

Transparencies used in the printer must be able to withstand 400° F (205° C), the printer’s maximum temperature. For best results, close the Rear Output Bin to print transparencies to the Top Output Bin.

CAUTION T o av oid damaging the printer, use only tr ansparencies recommended

for use in laser printers. If you have problems printing transparencies, use Tray 1.

Paper Specifications 1-19

Envelopes

Envelope Construction

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

28 lb (105 g/m

● Construction: Prior to printing, envelopes should lie flat with less

), or jamming may result.

than 0.25 in (6 mm) curl, and should not contain air. (Envelopes that trap air may cause problems.)

● Condition: Make sure envelopes are not wrinkled, nicked, or

otherwise damaged.

● Sizes in Tray 1: From 3 by 5 in (76 by 127 mm) to 8.5 by 14 in

(216 by 356 mm).

● Sizes in the optional envelope feeder: From 3.5 by 6.3 in

(90 by 160 mm) to 7 by 10 in (178 by 254 mm).

If you do not have an optional envelope feeder, always print envelopes from Tray 1. If envelopes wrinkle, try opening the Rear Output Bin.

1-20 Printer Description

Envelopes with Double Side Seams

Some envelopes have vertical seams at both ends of the envelope, rather than diagonal seams. This style of env elope may be more lik ely to wrinkle. When using envelopes with double side seams, be sure the seam extends all the way to the corner of the envelope as illustrated below.

Acceptable

Unacceptable

Figure 1-3 Envelopes with Double-Side-Seams

Envelopes with Adhesive 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 (400° F (205° C)) and pressure in the printer. The extra flaps and strips might cause wrinkling, creasing, or jams.

Paper Specifications 1-21

Envelope Margins

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

Table 1-16. Envelope Margins

Type of Address Top Margin Left Margin

Return Address 0.6 in (15 mm) 0.6 in (15 mm)

Delivery Address 2 in (51 mm) 3.5 in (89 mm)

Note For the best print quality, position margins no closer than 0.6 in (15 mm)

from the edges of the envelope.

Envelope Storage

Proper storage of envelopes helps contribute to good 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.

1-22 Printer Description

Card Stock and Heavy Paper

Many types of card stock can be printed from Tray 1, including index cards and postcards. Some types of card stock perform better than others because the construction is better suited for feeding through a laser printer.

For optimum printer performance, do not use paper heavier than 53 lb (199 g/m

) in Tray 1 or 28 lb (105 g/m2) in other trays. Paper that is too heavy might cause misfeeds, stac king problems , paper jams, poor Toner fusing, poor print quality, or excessive mechanical wear.

Note Printing on paper heavier than 53 lb may be possible if the tray is not

filled to capacity, and paper with a smoothness rating of 100-180 Sheffield is used.

Card Stock Construction

● Smoothness: 36-53 lb (135-199 g/m

smoothness rating of 100-180 Sheffield. 16-36 lb (60-135 g/m card stock should hav e a smoothness rating of 100-250 Sheffield.

● Construction: Card stock should lie flat with less than 0.2 in

(5 mm) of curl.

● Condition: Make sure card stock is not wrinkled, nicked, or

otherwise damaged.

● Sizes: Use only card stock within the following size ranges:

• minimum: 3 by 5 in (76 by 127 mm)

• maximum: 8.5 by 14 in (216 by 356 cm)

Note Before loading card stock in Tray 1, make sure it is regular in shape

and not damaged. Also, make sure the cards are not stuck together.

) card stock should have a

)

Card Stock Guidelines

●

If cards curl or jam, try printing from Tr ay 1 and opening the Rear Output Bin.

●

Set margins at least 0.08 in (2 mm) away from the edges of the paper.

Paper Specifications 1-23

Safety Information

Laser Safety Statement

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 radiation.

Canadian DOC Regulations

Complies with Canadian EMC Class B requirements.

Conforme á la classe B des normes canadiennes de compatibilité

électromagnétiques.

«CEM».»

1-24 Printer Description

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. Howe ver, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, 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 separation between equipment and receiver.

●

Connect equipment to an outlet on a circuit different from that to which the receiver is located.

●

Consult your dealer or an experienced radio/TV 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.

Safety Information 1-25

Laser Statement for Finland

LASERTURVALLISUUS LUOKAN 1 LASERLAITE KLASS 1 LASER APPARAT

HP LaserJet 4000/4000 T/4000 N/4000 TN and 4050/4050 T/4050 N/4050 TN -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.

HUOLTO

HP LaserJet 4000/4000 T/4000 N/4000 TN and 4050/4050 T/4050 N/4050 TN -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 erikoistyökaluja.

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 770-795 nm Teho 5 mW Luokan 3B laser

1-26 Printer Description

Toner Safety

Note Toner may stain clothing. Skin and clothing are best cleaned by

removing as much Toner as possible with a dry tissue, then washing with cold water. Hot w ater causes Toner to melt and permanently fuse into clothing.

The Toner Cartridge/Drum Material Safety Data Sheet (MSDS) can be obtained by contacting the HP LaserJet website at: http://www.ljsupplies.com/planetpartners/datasheets.html.

If you do not have access to the Internet, call the U.S. HP FIRST fax-on-demand service at (800) 231-9300. Use index number 7 for a listing of the Toner Cartridge/Drum Material/Chemical Safety Data Sheets.

Note T o get documents from HP FIRST b y f ax, y ou m ust use a Group 3 fax

machine.

Safety Information 1-27

Environmental Product Stewardship

Protecting the Environment

Hewlett-Packard Company is committed to providing quality products in an environmentally-sound manner. The printer has been designed to minimize impacts on the environment.

The printer design eliminates:

Ozone Production

CFC Usage Class I U.S. Clean Air Act stratospheric ozone-depleting chemicals

The printer uses charging rollers in the electrophotographic process and therefore generates no appreciable ozone gas (0

(chlorofluorocarbons [CFCs], for example) have been eliminated from the manufacturing of the printer and packaging.

The printer design reduces:

Energy Consumption

Energy usage drops from 330 watts (W) during printing to as little as 20W while in low-power (PowerSave) mode. This saves energy without affecting the high performance of the printer. This product qualifies for the

NERGY STAR

E program established to encourage the development of energy-efficient office products. The E U.S. Environmental Protection Agency.

Program (U.S. and Japan). E

NERGY STAR

As an E Company has determined that this product meets

NERGY STAR

name is a registered service mark of the

NERGY STAR

Guidelines for energy efficiency.

NERGY STAR

partner, Hewlett-Packard

is a voluntary

1-28 Printer Description

Service Approach

Overview

This chapter discusses the following:

●

Service Approach

●

Parts and Supplies

●

Warranty Statement

Overview 2-1

Service Approach

Repair of the printer normally begins with use of the printer’s internal diagnostics in conjunction with the troubleshooting procedures in Chapter 7. Once a faulty part is located, repair is generally accomplished by assembly level replacement of Field Replaceable Units (FRUs). Some mechanical assemblies may be repaired at the subassembly lev el. PCA component replacement is not supported by Hewlett-Pac kard.

2-2 Service Approach

Parts and Supplies

Ordering Information

Field replaceable and accessory part numbers are found in Chapter 8 of this manual. Replacement parts may be ordered from HP’s Service Materials Organization (SMO) or Support Materials Europe (SME), divisions of Product Support Division (PSD).

Use only accessories specifically designed for this printer. Accessories can be ordered from an authorized service or support provider. See page 2-6 and page 8-4 for ordering information.

Parts and Supplies 2-3

Helpful Documentation

Table 2-1 lists part numbers to order documentation.

Table 2-1. Helpful Documentation

Item Description or Use Part Number

HP LaserJet Printer Family Paper Specification Guide

PCL 5/PJL Technical Reference Documentation Package

HP LaserJet Basics CD-ROM

User’s Documentation Bundle, HP LaserJet 4000 and 4000 N Printers

User’s Documentation Bundle, HP LaserJet 4000 T and 4000 TN Printers

HP LaserJet 4050, 4050 T, 4050 N, and 4050 TN User’s Documentation CD-ROM

A guide to using paper and other print media with HP LaserJet printers.

A guide to using printer commands with HP LaserJet printers.

A guide to using HP LaserJet printer hardware

An additional copy of the user’s guide, the getting started guide, and the quick reference guide.

An additional copy of the user’s documentation CD-ROM

5040-9072

5021-0330

5081-9469

C4118-99051 (English)

C4119-99047 (English)

C4251-60104

User’s Documentation Bundle, HP LaserJet 4050 and 4050 N Printers

User’s Documentation Bundle, HP LaserJet 4050 T and 4050 TN

2-4 Service Approach

An additional copy of the getting started guide, and the quick reference guide.

C4251-99001 (English)

C4252-99001 (English)

Table 2-1.Helpful Documentation (continued)

Item Description or Use Part Number

Service and Support CD-ROM for the HPLaserJet 4050 Printers

HP LaserJet 4000 and 4050 Series Printers Service Manual

An interactive training CD-ROM for printer service representatives and customer care specialists.

A combined service manual for both series of printers.

C4251-60106

C4251-91003

Parts and Supplies2-5

Phone Numbers for Ordering

●

SMO (Service Materials Organization) 1-800-227-8164 (U.S. only)

●

SME (Support Materials Europe) (49 7031) 142253

Exchange Program

HP offers remanufactured assemblies for some parts. These are identified in Chapter 8 and can be ordered through Service Materials Organization (SMO) or Support Materials Europe (SME), divisions of Product Support Division (PSD).

Consumables

Paper and Toner Cartridges can be ordered directly from Hewlett-Packard. See Chapter 8 for ordering information.

World Wide Web

Printer drivers, updated HP printer software, and product and support information may be obtained from the following URL: in the U.S.http://www.hp.com/go/support

Printer drivers may be obtained from the following sites: in China ftp://www.hp.com.cn/go/support

in Japan ftp://www.jpn.hp.com/go/support in Korea http://www.hp.co.kr/go/support in Taiwan http://www.hp.com.tw/go/support

HP Service Parts Information Compact Disc

This powerful, CD-ROM-based parts information tool is designed to give users fast, easy access to parts information such as pricing and recommended stocking lists for a wide range of HP products. To subscribe to this quarterly service in the U.S. or Canada, call (800) 336-5987. In Asia Pacific, call (65) 740-4484. Parts identification and pricing information can also be accessed via the World Wide Web at http://www.hp.com/go/partsinfo.

2-6 Service Approach

or the local driver website http://www.dds.com.tw

HP Support Assistant Compact Disc

This support tool offers a comprehensive online information system designed to provide technical and product information on HP products. To subscribe to the quarterly service in the U.S. or Canada, call (800) 457-1762. In Hong Kong, Indonesia, Malaysia, or Singapore, call Mentor Media at (65) 740-4477.

HP FIRST

HP FIRST fax-on-demand service will deliver detailed troubleshooting information on common software and troubleshooting tips f or your HP product. Call from any touch tone phone and request up to three documents per call. These documents will be sent to the fax of your choice. Many of these numbers are local numbers and will not work internationally.

North and Latin America

Outside the U.S. and Canada: (404) 329-2009 In the U.S and Canada: (800) 333-1917

Asia/Pacific

Australia (03) 9272 2627 China (10) 6505 5280 Hong Kong 2506 2422 India (11) 682 6031 Indonesia (21) 352 2044 Japan (03) 3335 8622 Korea (02) 769 0543 Malaysia (03) 298 2478 New Zealand (09) 356 6648 Philippines (02) 848 9880 Singapore 275 7251 Thailand (02) 661 3511 Vietnam (08) 823 4161

Parts and Supplies 2-7

Europe, Middle East, and Africa

Austria 0660-8218 Belgium

Dutch 0800 1 1906

French 0800 1 7043 Denmark 800-10453 European International +31 20 681 5792 Finland 9800-13134 France 0800-9050900 Germany 0130-810061 Hungary 36 1 461-8222 Italy 1678-59020 Netherlands 0800-0222420 Norway 800-11319 Portugal 05 05 313342 Spain 900-993123 Sweden 020-795743 Switzerland

French 0800-551526

German 0800-551527 United Kingdom 0800-960271

Customer Care Reseller Sales and Service Support Center

The Customer Care Reseller Sales and Service Support Center is available to assist resellers and service technicians. You can reach this support center at 1-800-544-9976.

Other Areas

Outside of North America and Europe, contact your local HP sales office for assistance in obtaining technical support for resellers and service technicians.

2-8 Service Approach

Toner Cartridge Information

The Toner Cartridge is designed to simplify replacement of the major “consumable” parts. The Toner Cartridge contains the printing mechanism and a supply of Toner.

At 5% page coverage, a Toner Cartridge will print approximately 6,000 or 10,000 pages (depending on the model installed). However, a Toner Cartridge should print more pages if regularly printing pages with less coverage, such as short memos. If EconoMode is used full-time, it is possible that the Toner supply will outlast the mechanical parts in the Toner Cartridge. The cartridge may print fewer pages if routinely printing dense print.

Note For best results, always use a Toner Cartridge before the expiration

date stamped on the Toner Cartridge’s box.

Refilled Toner Cartridges

While Hewlett-Packard does not prohibit the use of refilled Toner Cartridges during the warranty period or while the printer is under a maintenance contract, it is not recommended for the following reasons:

●

Repairs resulting from the use of refilled Toner Cartridges are not covered under Hewlett-Packard warranty or maintenance contracts.

●

Hewlett-Packard has no control or process to ensure that a refilled Toner Cartridge functions at the high lev el of reliability of a new HP LaserJet Toner cartridge. Hewlett-Packard also cannot predict what the long term reliability effect on the printer is from using different Toner formulations found in refilled cartridges.

●

The print quality of HP LaserJet Toner Cartridges influences the customer’s perception of the printer. Hewlett-Packard has no control over the actual print quality of a refilled Toner Cartridge.

Recycling Toner Cartridges

In order to reduce waste, Hewlett-Packard offers a recycling program for used Toner Cartridges. Cartridge components that do not wear out are recycled. Plastics and other materials are recycled. HP pays the shipping costs from the user to the recycling plant. For each cartridge returned, HP donates one U.S. dollar to be shared by the Nature Conservancy and the National Wildlife Federation. To join this recycling effort, follow the instructions inside the Toner Cartridge’s box.

Parts and Supplies 2-9

Warranty Statement

The warranty for this product gives you specific legal rights. There may also be other rights that vary from area to area. Refer to the user’s documentation for the full warranty and supporting warranty information.

2-10 Service Approach

Printer Operation

Overview

This chapter discusses the following:

●

Using the Control Panel

●

Control Panel Menus

●

Service Mode

●

Testing the Printer

●

Resetting the Printer

●

System Configuration

●

Printer I/O Configuration

Overview 3-1

Using the Control Panel

Control Panel Layout

The printer’s Control Panel consists of the following:

2-line display

Ready

Data

Attention

Figure 3-1 Control Panel Layout

Control Panel Lights

Table 3-1. Control Panel Lights

READY

Cancel

Job

Item

– Value +

Select

4050 only

Light Indication

Ready The printer is ready to print.

Data The printer is processing information.

Attention Action is required. See the Control Panel display.

3-2 Printer Operation

Control Panel Keys

Table 3-2. Control Panel Keys

Key Function

[Go]

[Cancel Job] Cancels the print job that the printer is processing. The time it

[Menu] Cycles through the Control Panel menus. Press the right end of

[Item] Cycles through the selected menu’s items. Press the right end of

●

Places the printer either online or offline.

●

Prints any data residing in the printer’s buffer.

●

Allows the printer to resume printing after being offline. Clears most printer messages and places the printer online.

●

Allows the printer to continue printing with an error message such as

PAPER SIZE

●

Confirms a manual feed request if Tray 1 is loaded and

TRAY 1 MODE=CASSETTE

Handling Menu in the printer’s Control Panel.

●

Overrides a manual feed request from Tray 1 by selecting paper from the next available tray.

●

Exits the Control Panel menus. (To save a selected Control Panel setting, first press [Select].)

takes to cancel depends on the size of the print job. (Press it only once.)

the button to move forward or the left end of the button to move backward.

TRAY X LOAD [TYPE] [SIZE] or UNEXPECTED

has been set from the Paper

[– Value +]

[Select]

[?]

Cycles through the selected menu item’s values. Press [+] to move forward or [–] to move backward.

●

Saves the selected value f or that item. An asterisk (*) appears next to the selection, indicating that it is the new default. Default settings remain when the printer is switched off or reset (unless you reset all factory defaults from the Resets Menu).

●

Prints one of the printer information pages from the Control Panel.

Provides instructions for resolving most printer errors. Certain Control Panel error messages alternate with instructions on accessing the online help system. This on-board help system is a feature of the 4050 series printer only.

Using the Control Panel 3-3

Settings and Defaults

The printer makes most printing decisions based on either temporary settings or permanent defaults.

Note Settings sent from software applications override printer defaults.

Table 3-3. Settings and Defaults

Setting or Default Explanation

Temporary Setting A value set for the current print job by the software application. F or

example, a request from the software to print three copies instead of the Control Panel default value of one copy is a temporary setting. The printer continues to use the temporary setting until it receives another software request or until it is reset.

Control Panel Default A value set at the Control Panel when y ou select a men u item. An

asterisk appears, indicating the default setting. The printer retains this default when it is turned off.

Factory Default The value set for each menu item at the factory. Factory defaults

are listed in the item column in the menu tables starting on page 3-8.

Setting the display language

1 Press and hold [Select] while turning on the printer. Hold

2 Release [Select].

3 Press [– Value +] repeatedly until the desired language appears. 4 Press [Select] to save your choice. An asterisk (*) will appear

5 Press [Go] to exit the menu.

3-4 Printer Operation

[Select] until

SELECT LANGUAGE

INITIALIZING

LANGUAGE=ENGLISH

beside the selected language.

to appear.

appears. appears briefly. Wait for

Control Panel Menus

Press [Menu] f or access to all Control Panel menus. When additional trays or other accessories are installed in the printer, ne w menu items automatically appear.

To change a Control Panel setting:

1 Press [Menu] until the desired menu appears. 2 Press [Item] until the desired item appears. 3 Press [– Value +] until the desired setting appears. 4 Press [Select] to save the selection. An asterisk (*) appears next

to the selection in the display, indicating that it is now the default.

5 Press [Go] to exit the menu.

Note Settings in the printer driver and software application o verride Control

Panel settings. (Software application settings override printer driver settings.)

If you cannot access a menu or item, it is either not an option for the printer, or the customer’ s network administrator has locked the function. (The Control Panel reads customer’s network administrator.

ACCESS DENIED MENUS LOCKED

.) See the

To print a Control Panel menu map:

To see the current settings for all of the menus and menu items available on the Control Panel, print a Control Panel menu map.

1 Press [Menu] until 2 Press [Item] until 3 Press [Select] to print the menu map.

INFORMATION MENU

PRINT MENU MAP

appears.

Control Panel Menus 3-5

Quick Copy Jobs Menu

This menu provides a list of the quick cop y jobs stored on the printer’ s hard disk. The user can print or delete these jobs from the Control Panel.

Note If there are no quick copy jobs stored on the printer’s hard disk, this

menu is not displayed on the Control Panel.

Table 3-4. Quick Copy Jobs Menu

Item Value Explanation

[JOBNAME]

COPIES=1

999

DELETE

The name of the person who owns the quick copy job.

The number of additional copies the user wants to print.

1-999

: Prints the requested number of copies of

the job.

DELETE

: Deletes the job from the printer’s hard

disk.

3-6 Printer Operation

Private/Stored Jobs Menu

This menu provides a list of the private and stored jobs on the printer’s hard disk. The user can print or delete these jobs from the Control Panel.

Note If there are no private or stored jobs on the printer’s hard disk, this menu

is not displayed on the Control Panel.

Table 3-5. Private/Stored Jobs Menu

Item Value Explanation

[JOBNAME]

PIN:0000

COPIES=1

999

DELETE

The name of the job stored on the printer’s hard disk.

T o print the job, the user must enter the P ersonal Identification Number (PIN) assigned to the job in the driver.

The number of copies the user wants to print.

1-999

: Prints the requested number of copies of

the job.

DELETE

disk.

: Deletes the job from the printer’s hard

Control Panel Menus 3-7

Information Menu

This menu contains printer information pages that give details about the printer and its configuration. To print an information page, scroll to the desired page and press [Select].

Table 3-6. Information Menu

Item Explanation

PRINT MENU MAP

PRINT CONFIGURATION

PRINT PCL FONT LIST

PRINT PS FONT LIST

PRINT FILE DIRECTORY

PRINT EVENT LOG

SHOW EVENT LOG

The menu map shows the layout and current settings of the Control Panel menu items.

The Configuration Page shows the printer’s current configuration. If an HP JetDirect print server card is installed (HP LaserJet 4000 N/4000 TN and 4050 N/4050 TN printers), a JetDirect Configuration Page will print out as well.

The PCL font list shows all the PCL f onts currently av ailab le to the printer.

The PS font list shows all the PS fonts currently available to the printer.

This item appears only when a mass storage device (such as an optional flash DIMM or hard disk) containing a recognized file system is installed in the printer. The file directory shows information for all installed mass storage devices.

The event log lists printer events or errors.

This item allows you to view the most recent printer events on the Control Panel display. Press [– Value +] to scroll through the event log entries.

PRINT PAPER PATH TEST

PRINT USAGE PAGE

3-8 Printer Operation

The paper path test can be used to verify that the paper path is working properly , or to troub leshoot problems with a type of paper. Choose the input tray, output bin, duplexer (if available), and number of copies.

The usage page shows the quantity of pages printed, as well as the paper size used. It also reflects the number of one-sided versus two-sided pages (HP LaserJet 4050 only, with hard disk installed).

Paper Handling Menu

When paper handling settings are correctly configured through the Control Panel, you can print by choosing the type and size of paper from the printer driver or software application.

Some items in this menu (such as duplex and manual feed) can be accessed from a software application, or from the printer driver (if the appropriate driver is installed). Printer driver and software application settings override Control Panel settings.

Table 3-7. Paper Handling Menu

Item Values Explanation

ENVELOPE FEEDER SIZE=COM10

ENVELOPE FEEDER TYPE=PLAIN

TRAY 1 MODE= FIRST

TRAY 1 SIZE= LETTER

For supported paper sizes see page 1-12.

For supported paper types see page 1-12.

FIRST CASSETTE

For supported paper sizes see page 1-12.

This item appears only when the optional envelope feeder is installed. Set the value to correspond with the envelope size currently loaded in the envelope feeder.

This item appears only when the optional envelope feeder is installed. Set the value to correspond with the envelope type currently loaded in the envelope feeder.

Determine how the printer will use Tray 1.

FIRST

: If paper is loaded in Tray 1, the printer will pull paper from that tray first.

CASSETTE

assigned to Tray 1 using the

TRAY 1 SIZE

in this menu when

MODE=CASSETTE

to be used as a reserved tray.

This item appears only when

MODE= CASSETTE

correspond with the paper size currently loaded in Tray 1.

: A paper size must be

option (the next item

TRAY 1

). This allows T ra y 1

TRAY 1

. Set the value to

Control Panel Menus 3-9

Table 3-7. Paper Handling Menu (continued)

Item Values Explanation

TRAY 1 TYPE= PLAIN

TRAY 2 TYPE= PLAIN

TRAY 3 TYPE= PLAIN

TRAY 4 TYPE= PLAIN

For supported paper types see page 1-12.

MANUAL FEED=OFF OFF

This item appears only when

MODE= CASSETTE

correspond with the paper type currently loaded in Tray 1.

Set the value to correspond with the paper type currently loaded in Tray 2.

This item appears only when a third paper tray is installed. Set the value to correspond with the paper type currently loaded in Tray 3.

This item appears only when a fourth paper tray is installed (available only on the HP LaserJet 4000 T/4000 TN and 4050 T/4050 TN printers). Set the value to correspond with the paper type currently loaded in Tray 4.

Feed the paper manually from Tray 1, rather than automatically from a tray.

MANUAL FEED=ON

When is empty , the printer goes offline when it receives a print job and displays

. Set the value to

MANUALLY FEED [PAPER SIZE]

TRAY 1

and Tray 1

DUPLEX=OFF OFF

BINDING= LONG EDGE

3-10 Printer Operation

LONG EDGE SHORT EDGE

This item appears only when an optional duplexer is installed. Set the value to (duplex) or (simplex) of a sheet of paper.

This item appears only when an optional duplexer is installed and the duplex option is on. Choose the binding edge when duplexing (printing on both sides of paper).

to print on both sides

OFF

to print on one side

Table 3-7. Paper Handling Menu (continued)

Item Values Explanation

OVERRIDE A4/ LETTER=NO

CONFIGURE FUSER MODE MENU=NO

[TYPE]= NORMAL

NO YES

NORMAL LOW HIGH

Choose paper when an A4 job is sent, but no A4 size paper is loaded in the printer (or to print on A4 size paper when a letter job is sent, but no letter paper is loaded in the printer).

Configure the Fuser mode associated with each paper type. (This is only necessary if you are experiencing problems printing on certain paper types.)

not accessible.

YES

below).

Note

To see the default Fuser mode for each paper type, select back to the Information Menu, and print a menu map (page 3-8).

This item appears only when

YES

to print on letter size

: The Fuser mode menu items are

: Additional items appear (see

YES

, scroll

CONFIGURE FUSER MODE MENU=YES

NORMAL

to The exception is as follows:

. Most paper types are set

by default.

ROUGH=HIGH

(The available with A4, letter, and legal sizes.)

For a complete list of supported paper types, see page 1-12.

setting is only

Control Panel Menus 3-11

Print Quality Menu

Some items in this menu can be accessed from a software application, or from the printer driver (if the appropriate driver is installed). Printer driver and software application settings override Control Panel settings.

Table 3-8. Print Quality Menu

Item Values Explanation

RESOLUTION= FASTRES 1200

300 600 FASTRES 1200 PRORES 1200

Select the resolution from the following values:

300

: Produces draft print quality at the printer’s maximum speed (17 ppm). 300 dpi (dots per inch) is recommended for some bitmapped fonts and graphics, and for compatibility with the HP LaserJet III family of printers.

600

: Produces high print quality at the printer’s maximum speed (17 ppm).

FASTRES 1200

optimum print quality (comparable to 1200 dpi) at the printer’s maximum speed (17 ppm).

PRORES 1200

print quality (true 1200 dpi) at half the printer’s maximum speed (8 ppm for the HP LaserJet 4000 printer, or at highest print quality at engine speed for the HP LaserJet 4050 printer). When the resolution is changed, any downloaded resources (such as fonts or macros) will need to be downloaded again, unless they are stored on an optional hard disk or flash DIMM.

Note

It is best to change the resolution from the printer driver or software application. (Driver and software settings override Control Panel settings.)

: Produces

: Produces optimum

3-12 Printer Operation

Table 3-8. Print Quality Menu (continued)

Item Values Explanation

RET=MEDIUM OFF

LIGHT MEDIUM DARK

ECONOMODE=OFF OFF

Use the printer’s Resolution Enhancement technology (REt) setting to produce print with smooth angles, curves, and edges. REt does not affect print quality when the print resolution is set to ProRes 1200. All other print resolutions, including FastRes 1200, benefit from REt.

Note

It is best to change the REt setting from the printer driver or software application. (Driver and software settings override Control Panel settings.)

Turn EconoMode on (to save Toner) or off (for high quality). EconoMode creates draft-quality printing by reducing the amount of Toner on the printed page by up to 50%.

Caution

HP does not recommend full-time use of EconoMode. (If EconoMode is used full-time, it is possible that the Toner supply will outlast the mechanical parts in the Toner cartridge.)

Note

It is best to turn EconoMode on or off from the printer driver or software application. (Driver and software settings override Control Panel settings.)

Control Panel Menus 3-13

Table 3-8. Print Quality Menu (continued)

Item Values Explanation

TONER DENSITY=3 1

CREATE CLEANING PAGE

PROCESS CLEANING PAGE

Lighten or darken the print on the

2 3 4 5

No value to select. Press [Select] to print a cleaning

No value to select. This item appears only after a

page by changing the Toner density setting. The settings range from 1 (light) to 5 (dark), but the default setting of 3 usually produces the best results. Use a lower Toner density setting to save Toner.

Note

It is best to change the Toner density from the printer driver or software application. (Driver and software settings override Control Panel settings.)

page (for cleaning excess Toner from the Fuser assembly). In order for the cleaning page to work properly, print the page on copier grade paper (not bond or rough paper). Follow the instructions on the cleaning page.

cleaning page has been generated (as described above). Press [Select] to process the cleaning page.

3-14 Printer Operation

Printing Menu

Table 3-9. Printing Menu

Item Values Explanation

COPIES=1 1 TO 999

PAPER= LETTER

(110V printers) or

For supported paper sizes see page 1-12.

PAPER= A4

(220V printers) and

ENVELOPE= COM10

(110V printers) or

ENVELOPE= DL

(220V printers)

Set the default number of copies by selecting any number from 1 to 999. Press

[– Value +] once to change the

setting by increments of 1, or hold down [– Value +] to scroll by increments of 10.

Note

It is best to set the number of copies from the printer driver or software application. (Driver and software settings override Control Panel settings.)

Set the default image size for paper and envelopes. (The item name will change from paper to envelope as you scroll through the available sizes.)

CONFIGURE CUSTOM PAPER=NO

NO YES

NO:

The custom paper menu

items are not accessible.

YES:

The custom paper menu items appear (see the next item).

Control Panel Menus 3-15

Table 3-9. Printing Menu (continued)

Item Values Explanation

UNIT OF MEASURE= INCHES

(110V printers) or

MILLIMETERS

(220V printers)

X DIMENSION=

8.5 INCHES

(110V printers) or

216 MILLIMETERS

(220V printers)

Y DIMENSION=

14.0 INCHES

(110V printers) or

356 MILLIMETERS

(220V printers)

FORM= 60 LINES

(110V printers) or

64 LINES

(220V printers)

INCHES MILLIMETERS

3.00 TO 8.5 INCHES

(110V printers) or

76 to 216 MILLIMETERS

(220V printers)

5.00 TO 14.0 INCHES

(110V printers) or

127 to 356 MILLIMETERS

(220V printers)

5 to 128

This item appears only when

CONFIGURE CUSTOM PAPER=YES

measurement for the custom paper size.

This item appears only when

. Select the unit of

CONFIGURE CUSTOM PAPER=YES

dimension to be fed into the printer (short edge).

This item appears only when

. Select the

CONFIGURE CUSTOM PAPER=YES

dimension (long edge).

Sets vertical spacing from 5 to 128 lines for default paper size . Press [– Value +] once to change the setting by increments of 1, or hold down

[– Value +] to scroll by

increments of 10.

. Select the other

ORIENTATION= PORTRAIT

3-16 Printer Operation

PORTRAIT LANDSCAPE

Determine the default orientation of print on the page.

Note

It is best to set the page orientation from the printer driver or software application. (Driver and software settings override Control Panel settings.)

Table 3-9. Printing Menu (continued)

Item Values Explanation

PCL FONT SOURCE=INTERNAL

PCL FONT NUMBER=0

PCL FONT PITCH= 12.00

INTERNAL SOFT SLOT 1, 2, OR 3

0 TO 999

0.44 TO 99.99

INTERNAL SOFT:

SLOT 1, 2

in one of the three DIMM slots.

Note

It is best to set the font source from the printer driver or software application. (Driver and software settings override Control Panel settings.)

The printer assigns a number to each font and lists them on the PCL Font List. The font number appears in the Font # column of the printout.

Note

It is best to set the font number from the printer driver or software application. (Driver and software settings override Control Panel settings.)

This item might not appear, depending on the font selected. Press [– Value +] once to change setting by increments of.01 for pitch, or hold down [– Value +] to scroll by increments of 1.

Note

It is best to set the font pitch from the printer driver or software application. (Driver and software settings override Control Panel settings.)

: Internal fonts.

Permanent soft fonts.

, or 3: Fonts stored

Control Panel Menus 3-17

Table 3-9. Printing Menu (continued)

Item Values Explanation

PCL SYMBOL SET=PC-8

PC-8

many others

COURIER=REGULAR REGULAR

DARK

Select any one of several available symbol sets from the printer’s Control Panel. A symbol set is a unique grouping of all the characters in a font. PC-8 or PC-850 is recommended for line draw characters.

Note

It is best to set the symbol set from the printer driver or software application. (Driver and software settings override Control Panel settings.)

Select the version of Courier font to use:

REGULAR

Courier font available on the HP LaserJet 4 series printers.

DARK

available on the HP LaserJet III series printers. Both fonts are not available at the same time.

: The internal

: The internal Courier font

WIDE A4=NO NO

YES

3-18 Printer Operation

The Wide A4 setting changes the number of characters that can be printed on a single line of A4 paper.

: Up to 78 10-pitch characters can be printed on one line.

YES

: Up to 80 10-pitch characters can be printed on one line.

Table 3-9. Printing Menu (continued)

Item Values Explanation

YES

APPEND CR TO LF= NO

NO YES

Select carriage return to each line feed encountered in backward-compatible PCL jobs (pure text, no job control). Some environments, such as UNIX, indicate a new line using only the line feed control code. This option allows the user to append the required carriage return to each line feed.

to append a

PRINT PS ERRORS=OFF OFF

Select ON to print the PS error page when PS errors occur.

Control Panel Menus 3-19

Configuration Menu

Items in this menu affect the printer’s behavior. Configure the printer according to your printing needs.

Table 3-10. Configuration Menu

Item Values Explanation

POWERSAVE= 30 MINUTES

PERSONALITY= AUTO

OFF 15 MINUTES 30 MINUTES 1 HOUR 2 HOURS 3 HOURS

AUTO PCL PS

Set the printer to enter PowerSave after it has been idle for a specified amount of time. Turning PowerSave off is not recommended. The PowerSave feature does the following:

1. Minimizes the amount of power consumed by the printer when it is idle.

2. Reduces wear on the printer’s electronic components. (Turns off the display’s backlight.) When you send a print job, press a Control Panel key, open a paper tray, or open the top cover, the printer automatically comes out of PowerSave mode.

Note

PowerSave turns off the backlight on the display, but the display is still readable.

Select the default printer language (personality). Possible values are determined by which valid languages are installed in the printer. Normally you should not change the printer

AUTO

language (the default is change it to a specific printer language, the printer will not automatically switch from one language to another unless specific software commands are sent to the printer.

). If you

3-20 Printer Operation

Table 3-10. Configuration Menu (continued)

Item Values Explanation

RESOURCE SAVE= OFF

PCL MEMORY= 400K

OFF ON AUTO

and up (This value depends on the amount of installed memory.)

Dedicate printer memory to save each language’s permanent resources. (You might need to add memory to the printer in order for this item to appear .) The amount of memory set aside can be different for each installed language. Some languages might have memory set aside for resource saving without requiring all languages to do so. Any time the amount of memory dedicated to a specific language is changed, all languages will lose all saved resources, including any unprocessed print jobs.

OFF

: No language resource saving is performed, and language-dependent resources, such as fonts and macros, are lost when language or resolution changes.

: An item will appear for each installed language that allows the user to allocate a particular amount of memory to that language’s resource saving area. (See the items below.)

AUTO

: The printer automatically determines the amount of memory to use for each installed language’s resource saving area.

This item appears only when

SAVE=ON

used for saving PCL resources. Printer default is the minimum amount of memory needed to perform resource saving for PCL. Press [– Value +] to change settings by increments of 10 (up to 100 KB) or by increments of 100 (above 100 KB).

. Select the amount of memory

RESOURCE

PS MEMORY= 400K

and up (This value depends on the amount of installed memory.)

This item appears only when

SAVE=ON

used for saving PS resources. Printer default is the minimum amount of memory needed to perform resource saving for PS. Press [– Value +] to change settings by increments of 10 (up to 100 KB) or by increments of 100 (above 100 KB).

. Select the amount of memory

RESOURCE

Control Panel Menus 3-21

Table 3-10. Configuration Menu (continued)

Item Values Explanation

PAGE PROTECT= AUTO

CLEARABLE WARNINGS=JOB

AUTO CONTINUE= ON

AUTO ON

JOB ON

ON OFF

This item appears only after a

21 PAGE TOO COMPLEX, PRESS GO TO CONTINUE

Memory Enhancement technology (MEt) attempts to guarantee that all pages will print. If the page does not print, turn

PROTECT

chances of a

MEMORY, PRESS GO TO CONTINUE

message. If this occurs, simplify the print job or install additional memory.

Set the amount of time that a clearable warning is displayed on the printer’s Control Panel.

JOB

Control Panel until the end of the job from which they were generated.

: Warning messages display on the

Control Panel until [Go] is pressed.

Determine how the printer reacts to errors.

: If an error occurs that prevents printing, the message will display, and the printer will go offline for 10 seconds before returning online.

OFF

printing, the message will remain on the display and the printer will remain offline until [Go] is pressed. If the printer is on a network, you will probably want to turn

message displays.

PAGE

to ON. This might increase

20 INSUFFICIENT

: Warning messages display on the

: If an error occurs that prevents

AUTO CONTINUE

3-22 Printer Operation

Table 3-10. Configuration Menu (continued)

Item Values Explanation

TONER LOW=CONTINUE

CONTINUE STOP

RAM DISK=OFF OFF

ON AUTO

RAM DISK SIZE=XXXK

(This value depends on the amount of installed memory.)

and up

Determine how the printer behaves when Toner is low. The first appear when the Toner Cartridge is almost out of Toner. (About 100 to 300 sheets can still be printed.)

CONTINUE

while the displayed.

STOP

further action.

Determine how the RAM disk is configured. This item appears only if there is no optional hard disk installed and the printer has at least 8 MB of memory.

OFF ON

amount of memory to be used through the following item:

Note

If the setting is changed from from automatically reinitialize when it becomes idle.

Determine the size of the RAM disk. This item appears if Press [– Value +] to change settings by increments of 100.

Note

This setting cannot be changed if

TONER LOW

: The printer will go offline and wait for

: The RAM disk is disabled.

: The RAM disk is enabled. Configure the

OFF

DISK=AUTO

the printer to reinitialize when it becomes idle.

TONER LOW

: The printer will continue to print

message is

RAM DISK SIZE

AUTO

, the printer will

RAM DISK=ON

. Changing this value will cause

message will

OFF

to ON or

AUTO

RAM

Control Panel Menus 3-23

Table 3-10. Configuration Menu (continued)

Item Values Explanation

JAM RECOVERY= AUTO

MAINTENANCE MESSAGE=OFF

SMALL PAPER SPEED=NORMAL

AUTO ON OFF

OFF

NORMAL SLOW

Determine how the printer behaves when a paper jam occurs.

AUTO

: The printer automatically selects the

best mode for printer jam recovery (usually

AUTO

). This is the default setting.

: The printer automatically reprints pages after a paper jam is cleared.

OFF

: The printer does not reprint pages following a paper jam. Printing performance might be increased with this setting.

This item appears only after the

PRINTER MAINTENANCE

displays.

OFF MAINTENANCE

will not be displayed again until the next maintenance is due. The message should not be turned off unless the printer maintenance has been performed. If the required maintenance is not performed, the printer’s performance will degrade.

Select envelopes or small paper and standard paper sizes. Be sure to return the speed to when finished.

PERFORM PRINTER

: The

message will be cleared and

SLOW

when alternately printing

PERFORM

message

NORMAL

TONER LOW=CONTINUE

3-24 Printer Operation

CONTINUE STOP

Determine how the printer behaves when Toner is low. The will first appear when the Toner Cartridge is almost out of Toner. (About 100 to 300 sheets can still be printed)

CONTINUE

while the displayed.

STOP

: The printer will go offline and wait for

further action.

TONER LOW

: The printer will continue to print

TONER LOW

message is

message

Table 3-10. Configuration Menu (continued)

Item Values Explanation

QUICK COPY JOBS = 32

(HP LaserJet 4050 series printer with hard disk installed only)

Specifies the number of quick copy jobs that can be stored on the printer’s hard disk.

HELD JOB TIMEOUT = OFF

(HP LaserJet 4050 series printer with hard disk installed only)

CONFIGURE PRORES 1200=NO*

(HP LaserJet 4050 series printer only)

1 HOUR 4 HOURS 1 DAY 1 WEEK

YES NO

This setting allows the user to set the timeout value for how long a job will be stored before it is automatically deleted from the held job queue.

This item allows the user to tell the printer whether or not to use ProRes, which provides 1200 dpi. If another menu entry appears giving the user the option of

NORMAL

YES

is selected,

HALF

speed.

Control Panel Menus 3-25

I/O Menu

Items in the I/O (input/output) Menu affect the communication between the printer and the computer.

Table 3-11. I/O Menu

Item Values Explanation

300

I/O TIMEOUT=15

Select the I/O timeout period in seconds. (I/O timeout refers to the time, measured in seconds, that the printer waits before ending a print job.) This setting allows you to adjust timeout for best performance. If data from other ports appear in the middle of your print job, increase the timeout value. Press [– Value +] once to change settings by increments of 1, or hold down [– Value +] to scroll by increments of 10.

I/O BUFFER=AUTO AUTO

ON OFF

I/O BUFFER SIZE=

10K

100K

Allocate memory for I/O buffering.

AUTO

: The printer automatically reserves memory for I/O buffering. Additional configurations are not required and the

I/O BUFFER SIZE

appear.

below). Specify the amount of memory to be used for I/O buffering.

OFF

I/O BUFFER SIZE

: The

: I/O buffering is not performed and the

I/O BUFFER SIZE

When the I/O buffer setting is changed, any downloaded resources (such as fonts or macros) will need to be downloaded again, unless they are stored on an optional hard disk or flash DIMM.

and up This item appears only when

Specify the amount of memory for I/O buffering. The maximum amount of memory available for I/O buffering is determined by the amount of memory installed in the printer, the languages installed in the printer, and by other memory allocations that must be made. Press [–Value +] to change settings by increments of 10 (up to 100 KB) or by increments of 100 (above 100 KB).

menu item does not

item does not appear.

item appears (see

I/O BUFFER=ON

3-26 Printer Operation

Table 3-11. I/O Menu (continued)

Item Values Explanation

PARALLEL HIGH SPEED=YES

PARALLEL ADV FUNCTIONS=ON

SERIAL PACING=DTR/DSR

YES NO

ON OFF

DTR/DSR XON/XOFF

Select the speed at which data is transmitted to the printer.

YES

: The printer accepts faster parallel communications used for connections with newer computers.

: The printer accepts slower parallel communications used for connections with older computers.

Turn the bidirectional parallel communication on or off. The default is set for a bidirectional parallel port (IEEE-1284). This setting allows the printer to send status readback messages to the computer. (Turning on the parallel advanced functions might slow language switching.)

Select the type of pacing used. Pacing, or “handshaking” allows the printer to tell the computer when to send information. The printer uses XON/XOFF and DTR/DSR signal protocols rather than ETX/ACK protocol.

DTR/DSR

requires hardware flow control (most personal computers do).

XON/XOFF

requires software flow control (a UNIX workstation, for example). The

ROBUST XON

: Select this value if your computer

SERIAL

item appears (see below).

Control Panel Menus 3-27

Table 3-11. I/O Menu (continued)

Item Values Explanation

SERIAL ROBUST XON=ON

SERIAL BAUD RATE=9600

ON OFF

300 600 1200 2400 4800 9600 19200 38400 57600 115200

This item appears only when

PACING=XON/XOFF

generating XONs.

: The printer sends an XON when the printer is online and when sufficient buffer space is available . If the host does not receive data within approximately one second, the printer will transmit additional XONs at one second intervals until the host receives data.

OFF

: The printer sends one XON when it can accept more data or when it is online. The printer does not send XONs every second while the printer is online and ready for more data.

Select the printer’s baud rate (speed at which information is transferred) for communicating from the computer to the printer.

. Select the method for

SERIAL

SERIAL DTR POLARITY=HIGH

3-28 Printer Operation

HIGH LOW

Determine whether pin #8 is high or low when the printer is ready.

HIGH

: Pin number 8 is held high when the

printer is ready.

LOW

: Pin number 8 is held low when the printer is ready.

EIO Menu (Networked Printers)

EIO (enhanced input/output) Menus depend on the particular accessory product installed in an EIO slot of the printer. If the printer contains an HP JetDirect print server EIO card, you can configure basic networking parameters using the EIO Menu. These and other parameters can also be configured through HP JetAdmin.

Table 3-12. EIO Menu

Item Values Explanation

CFG NETWORK=NO NO

YES

: The JetDirect Menu is not accessible.

YES

: The JetDirect Menu appears.

NOVELL=ON ON

OFF

DLC/LLC=ON ON

OFF

TCP/IP=ON ON

OFF

ETALK=ON ON

OFF

CFG NOVELL=NO NO

YES

Select whether the IPX/SPX protocol stack (in Novell NetWare networks, for example) is enabled (on) or disabled (off).

Select whether the DLC/LLC protocol stack is enabled (on) or disabled (off).

Select whether the TCP/IP protocol stack is enabled (on) or disabled (off).

Select whether the Apple EtherTalk protocol stack is enabled (on) or disabled (off).

: The IPX/SPX Menu is not accessible.

YES

: The IPX/SPX Menu appears. In the IPX/SPX Menu, you can specify the frame type parameter used on your network. The

AUTO

default is the frame type to the one detected. For Ethernet cards, frame type selections include

EN_SNAP

For Token Ring cards, frame type selections include In the IPX/SPX Menu for Token Ring cards, you can also specify NetWare Source Routing parameters, which include

RT=AUTO ALL RT

, to automatically set and limit

EN_8023, EN_II, EN_8022

TR_8022, TR_SNAP

(default),

OFF, SINGLE R

SRC

, or

Control Panel Menus 3-29

Table 3-12. EIO Menu (continued)

Item Values Explanation

CFG TCP/IP=NO NO

YES

CFG ETALK=NO NO

YES

: The TCP/IP Menu is not accessible.

YES

: The TCP/IP Menu appears. In the TCP/IP Menu, you can specify for TCP/IP parameters to be automatically loaded from a bootp or DHCP server when the printer is turned on. If you specify

BOOTP=NO

TCP/IP parameters from the Control Panel. You can manually set each byte of the IP address (IP), Subnet Mask (SM), Syslog Server (LG), and Default Gateway (GW). Also, you can manually set the Timeout time period.

Note

If no IP address is assigned within the first 5 minutes, the HP JetDirect print server card will assume a default IP address of

192.0.0.192.

: The EtherTalk Menu is not accessible.

YES

EtherTalk Menu you can set the AppleTalk phase parameter ( for your network.

, you can manually set selected

: The EtherTalk Menu appears. In the

BOOTP=YES

ETALK PHASE=1 OR 2

)

3-30 Printer Operation

Resets Menu

Use this menu with caution. You can lose buffered page data or printer configuration settings when you select these items. Only reset the printer under the following circumstances:

●

You want to restore the printer’s default settings.

●

Communication between the printer and computer has been interrupted.

●

You are using both the serial and parallel I/O ports, and one of the ports is having problems.

The items in the Resets Menu will clear all memory in the printer, while [Cancel Job] clears only the current job.

Note Job retention features will be deleted if you do not have the hard disk

accessory. (HP LaserJet 4050 series printer only.)

Table 3-13. Resets Menu

Item Explanation

RESET MEMORY

RESTORE FACTORY SETTINGS

RESET ACTIVE I/O CHANNEL

RESET ALL I/O CHANNELS

This item clears the printer buffer and the active I/O input buffer, and makes the Control Panel defaults current. Resetting memory during a print job can result in data loss.

This item performs a simple reset and restores most of the factory (default) settings. This item also clears the input buffer for the active I/O.

This item performs a simple reset and clears the input and output buffers (for the active I/Os only).

This item performs a simple reset and clears the input and output buffers for all I/Os.

Control Panel Menus 3-31

Service Mode

Service Mode should be used only by authorized service personnel. While in Service Mode, you can:

●

Verify and set the page count and serial number. These are displayed on the Configuration Page.

●

Set the Cold Reset Default. (This sets the factory default paper size to either Letter or A4).

●

Turn the diagnostic functions on or off (for software developers only).

●

Clear the Event Log.

●

Set the interval at which the message appears on the Control Panel.

To enter Service Mode: 1 Hold down [Select] and [Cancel Job] while turning on the printer

until all of the lights on the Control Panel are lit. (If the Control Panel reads

2 Press the right side of the [Menu] key, then press [Select]. The

message press [Go].

INITIALIZING

SERVICE MODE

PERFORM PRINTER MAINTENANCE

, the keys were released too soon.)

is displayed. To exit the Service Mode

3-32 Printer Operation

Service Menu

Figure 3-2 Service Menu

Setting the Page Count, Maintenance Count, and Serial Number

The page count and printer serial number are stored in non-volatile memory. If it is necessary to replace the Formatter PCA, the page count should be set to the current value to reflect the age of the Print Engine. The procedure for setting the serial number is similar to setting the page count.

Note Before replacing the Formatter PCA, print a Configuration Page to

verify the current page count and serial number of the printer, if possible. Use the information on the Configuration Page to reset the page count and printer serial number for the new Formatter PCA.

Service Mode 3-33

Page Count

The page count stored in NVRAM and displayed on the Configuration Page printout represents the number of pages which the printer has printed (excluding engine test prints). If it becomes necessary to repair a printer by installing a new Formatter , the page count must be reset so that it represents the age of the printer’s engine rather than the age of the Formatter.

The page count value is changed using a different method than is used for other Control Panel values. Instead of increasing the entire value by increments, each digit can be selected and modified individually. The following Control Panel keys are used to modify the page count value:

[Select] Enters any changes to the current digit and advances the

cursor one digit to the right. If the last digit is currently selected, pressing the [Select] key wraps the cursor around to the first digit.

[Value +] Increases the value of the currently selected digit by one.

Pressing [Value +] when 9 is the value of the currently selected digit will change the value of the digit to 0.

[– Value] Decreases the value of the currently selected digit by one.

Pressing [– Value] when 0 is the value of the currently selected digit will change the value of the digit to 9.

Table 3-14 shows the sequence of keystrokes used to change the page count from a value of 000000 to a value of 0010480.

Table 3-14. Changing the Page Count

Key Press Display Description

SERVICE MODE

[Menu+]

[Item+]

[Select]

SERVICE MENU

PAGES=0000000 *

3-34 Printer Operation

Enter the

Advance to the first item in the

Advance the cursor one digit to the right.

SERVICE MENU

SERVICE

Table 3-14. Changing the Page Count (continued)

Key Press Display Description

[Select]

[Value +]

[Select]

[Value +]

(4 presses)

[Select]

[– Value]

(2 presses)

[Select]

(2 presses)

PAGES=0000000

* Advance the cursor one digit to the right.

PAGES=0010000 *

PAGES=0010400 *

PAGES=0010480 *

PAGES=00104 80 *

Increase the value of the third digit by one.

Enter the change to the third digit and advance the cursor one digit to the right.

Advance the cursor one digit to the right.

Increase the value of the fifth digit by four.

Enter the change to the fifth digit and advance the cursor one digit to the right.

Decrease the value of the sixth digit by two.

Enter the change to the sixth digit and advance the cursor one digit to the right causing the cursor to wrap around to the first digit.

[Go] To exit.

Maintenance Page Count

The maintenance page count should be reset only after a maintenance kit has been installed.

This will reset the maintenance counter so that the message

PRINTER MAINTENANCE

(default).

●

Hold down the [– Item] and [

●

Turn the printer on.

●

Wait for release both keys.

RESET MAINTENANCE COUNT

will display another 200,000 pages later

Value] keys.

–

to be displayed and then

PERFORM

Service Mode 3-35

MAINTENANCE COUNT

interval at which the next service is due for the printer. This is set initially at the factory to 200,000 pages. (For example, the message displays at 200,000 pages. If the Printer Maintenance Kit is installed at 200,114 pages, the message displays 200,000 pages later, at 400,114 pages.) Editing this number is similar to editing the item above.

in the Service Mode Menu sets the page count

PAGES

Serial Number

If a Formatter is replaced, then the printer serial number must be reentered. Editing this number is similar to editing the above.

PAGES

item

Cold Reset Paper

The default paper size is stored in NVRAM and when the printer is cold reset, the default paper size is set to the f actory setting. P ossib le values are When replacing the Formatter in countries that use A4 rather than letter size paper, set the cold reset paper size to

COLD RESET PAPER=LETTER

and

COLD RESET PAPER=A4

Diagnostics

This menu item enables or disables the use of the firmware diagnostic features. Possible values are

DIAGNOSTICS=ON

accessible when the printer is in the online the [Select] key.

Note This feature is for developers only.

. When enabled, the diagnostic features are

DIAGNOSTICS=OFF*

Clear Event Log

This item allows the internal Event Log to be cleared.

3-36 Printer Operation

and

state by pressing

READY

Testing the Printer

When you print a Configuration Page, the printer checks its internal controller and I/O interface, and then prints a test page. You can review the Configuration Page printout to verify proper installation of such options as paper trays or printer languages. For more information, see page 7-52.

Engine Test

The engine test print can be used to verify that the Print Engine is functioning correctly. For more information, see page 7-11.

Testing the Printer 3-37

Resetting the Printer

Cold Reset

Cold reset clears all data from the printer memory and sets all the defaults back to the factory settings.

CAUTION Performing a Cold Reset resets the HP JetDirect configuration. T o av oid

making changes to your configuration, remove the HP JetDirect card before performing a cold reset.

If possible, print a Configuration P age prior to performing a Cold Reset. This will document current settings for later reference.

To perform a Cold Reset: 1 Turn off the printer. 2 While pressing [Go], turn the printer on.

briefly on the display, then seconds, followed by

3 Press [Go] to return the printer online.

display.

RESTORING FACTORY SETTINGS

OFFLINE

INITIALIZING

. The cold reset is complete.

COLD RESET

appears. After a few

appears on the display,

appears on the

READY

appears

Clearing NVRAM

This procedure will clean up the NVRAM by removing old areas that are not being used.

1 Turn off the printer. 2 While pressing [Cancel Job] turn the printer on.

appears briefly on the display, followed by few seconds

READY

appears.

CLEANUP NVRAM

INITIALIZING

. After a

3-38 Printer Operation

System Configuration

MS-DOS System Configuration

To communicate properly with the printer, the MS-DOS environment requires the addition or modification of MODE commands in the AUTOEXEC.BAT file. Add or modify the MODE command(s), depending on the interface configuration, as follows:

Parallel DOS Commands

Most IBM and AT compatible computers default to a parallel printer port. To ensure that information is sent to your parallel printer port, type the following MS-DOS command at your MS-DOS prompt or include it in your AUTOEXEC.BAT file:

MODE LPT1: , , P

For MS-DOS version 4.0 and above, enter:

MODE LPT1: , , B

Note This example assumes that you are using parallel printer port LPT1. If

you are using LPT2 or LPT3, replace LPT1 in the example with the printer port that you are using.

Since the MODE command is an external MS-DOS command (a program named MODE.COM is run when the MODE command is invoked), the prog ram file must be contained in the root directory, or in a directory specified in a preceding PATH command in the AUTOEXEC.BAT file.

After changing the AUTOEXEC.BAT file, reboot the computer to initiate the changes.

System Configuration 3-39

Serial MS-DOS Commands

Most IBM compatible computers default to a parallel printer port. To ensure that information is sent to the serial printer port, type the following MS-DOS commands at the MS-DOS prompt, or include them in the AUTOEXEC.BAT file.

MODE COM1: 9600, N, 8, 1, P MODE LPT1: =COM1

For MS-DOS version 4.0 or above, enter:

MODE COM1: 9600, N, 8, 1, B MODE LPT1: =COM1

Note These examples assume that you are using serial printer port COM1.

If you are using COM2 or COM3, replace COM1 with the printer port that you are using.

Since the MODE command is an external MS-DOS command (a program named MODE.COM is run when the MODE command is invoked), the program file must be contained either in the root directory or in a directory specified in a preceding PATH command in the AUTOEXEC.BAT file.

After changing the AUTOEXEC.BAT file, reboot the computer to initiate the changes.

3-40 Printer Operation

Printer I/O Configuration

Parallel Menu

The default setting for the set to older computers. When the default is set to runs at a higher rate supported by newer computers.

, the interface runs at a slower speed that is compatible with

HIGH SPEED PARALLEL I/O

, the parallel interface

YES

. If it is

Advanced Functions

The

ADVANCED FUNCTIONS

communications between the printer and the host. The default setting is

. This default setting (ON) must be active in order to use

HP LaserJet Explorer, the Windows software applications and drivers.

feature of the printer enables bidirectional

Printing System, and other

Serial Configuration

Use RS-232C serial configuration when the printer is located 11 to 50 feet (3.35 to 15.24 meters) from the computer. If you need to locate the printer between 51 and 2000 feet (15.54 and 610 meters) from the computer, use an RS-422A serial configuration.

Serial I/O settings must be configured correctly for proper serial communication.

Serial Protocol

When printing with a serial configuration, the same protocol must be set on both the printer and the computer. Protocol on the printer is set by changing the Control Panel settings. Protocol on the computer is set by using DOS commands. The default protocol settings are described below.

BAUD Rate

The

BAUD RATE

transferred to and from the computer. The default setting is

BAUD RATE=9600*

setting tells the printer how fast information is

Printer I/O Configuration 3-41

Pacing (Handshaking)

Pacing (or “handshaking”) is a type of communication between the printer and the computer. This is an important setting in the printer because it allows the printer to tell the computer when to send information. If the printer is unable to receive information, for example, when the print buffer is full or when the printer is out of paper, a signal is sent to the computer to stop sending information. When the printer is able to resume receiving information, it sends another signal to the computer to send more data.

Pacing is set through the Control Panel’s I/O Menu. Two types of handshaking are supported by the printer:

●

Select

DTR/DSR

computer requires hardware flow control (most personal computers do). Through the I/O Menu’s DTR polarity can be set to High or Low. The default is

POLARITY=HI

●

Select

XON/XOFF

computer requires software flow control (for example, if you are using a UNIX workstation). Note that status readback messages are not paced when Menu’s default) or under the I/O Menu if

ROBUST XON

through the I/O Menu’s

XON/XOFF

item, Robust Xon can be set to ON (the

. Note that the

OFF

XON/XOFF

PACING

DTR POLARITY

item if the

item, the

DTR

PACING

is selected. Through the I/O

ROBUST XON

is selected.

item only appears

item if the

3-42 Printer Operation

Printer Maintenance

Overview

This chapter discusses the following:

●

Cleaning the Printer and Accessories

●

Preventative Maintenance

Overview 4-1

Cleaning the Printer and Accessories

To maintain high print quality and performance, thoroughly clean the printer and the paper handling accessories:

●

Every time you change the Toner Cartridge (run a cleaning page).

●

After printing approximately 10,000 pages.

●

Whenever print quality problems occur.

Clean the outside surfaces with a lightly water-dampened cloth. Clean the inside parts as indicated in Table 4-1. Observe the warning and caution below.

WARNING! Before you begin these steps, turn the printer off and unplug all power

cords to avoid shock hazard. Be careful when cleaning around the Fusing Assembly area. It may be

hot.

CAUTION To avoid permanent damage to the Toner Cartridge, do not use

ammonia-based cleaners on or around the printer. Do not touch the T ransf er Roller . Skin oils on the roller can reduce print

quality. If Toner gets on your clothes, wipe it off with a dry cloth and wash your clothes in cold water. Hot water sets Toner into fabric.

Figure 4-1 Location of the Transfer Roller – Do Not Touch!

4-2 Printer Maintenance

Table 4-1. Cleaning the Printer

Component Cleaning Method / Notes

Outside Covers Use a water-dampened cloth. Do not use solvents or

ammonia-based cleaners.

Inside General With a dry lint-free cloth, wipe any dust, spilled Toner, and paper

particles from the paper path area, the Registration Roller, and the Toner Cartridge cavity.

Paper Pickup, Feed, and Separation Rollers

Separation Pad Use a dry, lint-free cloth.

Registration Roller Use a dry, lint-free cloth.

Transfer Roller Use a dry, lint-free cloth. DO NOT TOUCH with your fingers.

Fuser Use a water-dampened, lint-free cloth.

Use a water-dampened, lint-free cloth.

Cleaning the Printer and Accessories 4-3

Using the Printer Cleaning Page

If Toner specks appear on the front or back side of your print jobs, follow the procedure below.

From the printer’s Control Panel, do the following:

1 Press [Menu] until 2 Press [Item] until 3 Press [Select] to create the cleaning page. 4 Follow the instructions on the cleaning page to complete the

cleaning process.

Note In order for the cleaning page to work properly, print the page on copier

grade paper (not bond or rough paper). You might need to create a cleaning page more than once. When

Toner has been cleaned from the Fuser Assembly, shiny black spots will appear on the page’s black strip.

To ensure good print quality with certain types of paper, use the cleaning page every time the Toner Cartridge is replaced. If the cleaning page is frequently needed, try a different type of paper.

PRINT QUALITY MENU

CREATE CLEANING PAGE

appears.

Cleaning Spilled Toner

Defective Toner Cartridges can develop leaks. Also, after a paper jam has occurred, there may be some Toner remaining on the rollers and guides inside the printer. The pages that print immediately after the jam may pick up this Toner.

Clean spilled Toner with a cloth dampened with cold water. Do not touch the Transfer Roller with the damp cloth or with your fingers. Do not use a vacuum cleaner unless it is equipped with a micro-fine particle filter.

4-4 Printer Maintenance

Preventative Maintenance

The preventative maintenance cycle for this printer is every 200,000 pages. To order the maintenance kit see page 8-2. The kit contains the following replacement parts:

●

One Fuser

●

One Transfer Roller

●

One Tray 1 Roller

●

Three Feed Rollers

●

Three Separation Rollers

Refer to the instructions included in the kit for detailed replacement procedures.

Reset Maintenance Count

After the PM kit has been installed, reset the maintenance count.

1 Turn the printer off. 2 While pressing [– Item] and [– Value] turn the printer on.

RESET MAINTENANCE COUNT

After a few seconds

READY

appears, followed by

appears.

INITIALIZING

Preventative Maintenance 4-5

Expected Life of Components

The following table shows the expected life of certain components in the printer. To order parts, see Chapter 8.

Table 4-2. Life of Components for the HP LaserJet 4000 and 4050 Series Printer

No. Part name Part No. Quantity Expected Life

1 Tray 1 Pickup Roller RG5-3718-000CN 1 100,000 pages

2 Tray Feed Roller RF5-2490-000CN 1 200,000 pages

3 Tray Separation Roller RF5-2490-000CN 1 200,000 pages

4 Tray 1 Separation Pad RG5-2655-000CN

(Tray 1 Pickup Assembly)

5 Tray 1 Pickup Solenoid RH7-5172-000CN 1 200,000 pages

6 Fuser

100-127V 220-240V

7 Transfer Charging Roller RG5-4283-000CN 1 200,000 pages

8 Cooling Fan RH7-1335-000CN 1 25,000 hours

9 Duplexer Exhaust Fan RH7-1361-000CN 1 25,000 hours

C4118-69003 C4118-69004

1 200,000 pages

1 1

200,000 pages 200,000 pages

4-6 Printer Maintenance

Functional Information

Overview

This chapter presents a generalized functional overview of the printer and the printing processes. This chapter discusses the following printer systems:

●

Power Supply System

●

Engine Controller System

●

Formatter System

●

Image Formation System

●

Paper Feed System

●

Basic Sequence of Operation

Overview 5-1

Power Supply System

AC/DC Power Distribution

AC power is supplied to the low-voltage power supply circuit in the Engine Controller Board when the power switch (SW1) is turned on. The low-voltage power supply circuit supplies +24 VDC and +3.3 VDC required for the printer.

+24 VDC is supplied to drive the main motor, scanner motor and fan, and to the high-voltage power supply. +3.3 VDC is used for sensors and ICs on the engine controller board. +24 VDC is divided into +24 V A which is normally supplied from the low-v oltage power circuit, and +24VB which is interrupted when the door switch (SW101) turns off by opening the upper cover.

Figure 5-1 Low-voltage Power Supply Circuit

If a short-circuit or other problems on the load side cause an excessive current flow from the +24VDC , or +3.3 VDC po wer supplies or generate abnormal voltage, the excess-current protection system and excess-voltage protection system automatically shut off the output voltage to protect the power supplies.

If the protection systems are activated and the power supply circuit does not output DC voltage, it is necessary to turn the printer off, correct the problem in the faulty load, then turn the printer on again.

The circuit has two fuses which break the circuit and cut off the output voltage if excess current flows through the AC line.

5-2 Functional Information

Overcurrent Overvoltage Protection

The Fusing Heater Safety Circuit is located on the Engine Controller Board, and constantly monitors the fusing temperature.

In case of abnormality, the output from this circuit turns off the relay (RL101) and interrupts the power to the fusing heater.

If an increase in the temperature of the Fusing Heater causes the Thermistor Output voltage to exceed about 1.2V (240° C), the output of pin #13 of the comparator (IC301) becomes “L”.

When the output of pin #14 becomes “L” and Q302 is turned off, the relay (RL101) is turned off.

To protect the Fuser from excessive voltages, the printer has the following three protective functions:

●

The CPU monitors the voltage of TH901. If it is abnormal, the CPU assesses fusing heater failure and turns off the relay (RL101). At the same time, it reports the fusing heater failure to the Formatter.

●

If the temperature of the fusing heater rises abnormally and the voltage of TH901 falls below about 1.2V (240° C), the fusing heater’s safety circuit interrupts the power to the fusing heater, regardless of CPU outputs.

●

If the temperature of the fusing heater rises abnormally and the temperature of the Thermal Fuse exceeds about 230° C, the temperature fuse melts, which interrupts the power to the fusing heater.

Power Supply System 5-3

High-voltage Power Distribution

Figure 5-2 Engine Controller Board

In response to the instructions from the microprocessor (CPU:IC 501) on the Engine Controller Board, this circuit applies the superimposed voltage of DC voltage and AC voltage to the primary charging roller and Developing Cylinder, and a positive or negative DC voltage to the transfer charging roller.

According to the image density information sent from the Formatter, this circuit varies the primary DC bias and developing DC bias to adjust the image density.

5-4 Functional Information

HP 4050, 4000 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Contents

Overview

Identification

Environmental Requirements

Laser Safety Statement

Canadian DOC Regulations

FCC Regulations

Laser Statement for Finland

Toner Safety

Environmental Product Stewardship

Overview

Service Approach

Exchange Program

Consumables

World Wide Web

HP Service Parts Information Compact Disc

HP Support Assistant Compact Disc

HP FIRST

Overview

Control Panel Menus

Quick Copy Jobs Menu

Private/Stored Jobs Menu

Service Menu

Cold Reset Paper

Diagnostics

Clear Event Log

System Configuration

MS-DOS System Configuration

Parallel DOS Commands

Serial MS-DOS Commands

Printer I/O Configuration

Parallel Menu

Serial Configuration

Overview

Reset Maintenance Count

Expected Life of Components

Overview