HP 4050, 4000 Service Manual

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

™

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

+ 364 hidden pages