HP LaserJet 4550, LaserJet 4500 Service Manual

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hp color LaserJet

4550/4500 series

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HP Color LaserJet 4550/4550N/4550DN/ 4550HDN Printer and HP Color LaserJet 4500/ 4500 N/4500 DN Printer

Service Manual _____________

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Part number: C7085-90921 First Edition, October 2000

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

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

Arial is a U.S. registered trademark of the Monotype Corporation.

CompuServe CompuServe, Inc.

NERGY STAR is a U.S. registered service

E mark of the United States Environmental Protection Agency.

Microsoft Microsoft Corporation.

PANTONE trademark for color.

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

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

UNIX is a registered trademark in the United States and other countries, licensed exclusively through X/Open Company Limited.

Windows, MS Windows, and Windows NT are U.S. registered trademarks of Microsoft Corporation.

is a U.S. trademark of

is a U.S. registered trademark of

Pantone, Inc.’s check-standard

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

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Conventions

This is a combined Service Manual for both the HP Color LaserJet 4500 series printer and the HP Color LaserJet 4550 series printer. The HP Color LaserJet 4550 series printer shares most characteristics of the HP Color LaserJet 4500 series printer, except where stated.

This manual uses the following conventions:

OLoR is used to emphasize items that are important to the material under discussion.

Bold is used for emphasis, particularly in situations where italic type would be confusing. Italic type is used to indicate related documents or emphasis.

DISPLAY type indicates text as seen on the printer control panel display.

Commands you use on a computer keyboard or on the printer control panel are shown in

[Keycap]. Two examples are [Select], and [-[Value +].

COURIER type indicates text that you type on a computer keyboard exactly as shown.

Hint Hints are used to suggest an action that might simplify the process.

WWW World Wide Web ref erences give Internet addresses for additional information and information updates.

Note Notes contain important information set off from the text.

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

WARNING! Warning messages alert you to the possibility of personal injury.

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1 Printer description

Printer features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Site requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

Printer specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

Printer assemblies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

Media requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

Environmental Product Stewardship Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

Regulatory statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36

Safety information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

2 Service approach

Service approach . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40

Parts and supplies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

Warranty statement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44

3 Installation and configuration

Unpack the printer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48

Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50

Connecting to a network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64

Enhanced I/O (EIO) configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67

Printer drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69

Network configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70

Configuration tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71

Setting network security on the printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73

4 Printer maintenance

Cleaning the printer and accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78

Approximate replacement intervals for consumable items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80

Locating consumables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .84

Replacing consumable items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .85

DIMM configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .98

5 Theory of operation

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .102

Basic operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .103

Image formation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .104

Toner density. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .111

Mechanical system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .112

Paper path. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .122

DC controller subsystem. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .132

Motors and fans. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .133

Formatter system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .135

Power supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .135

Contents v

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6 Removal and replacement

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139

Consumable assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142

Covers, drawers, and top and front assemblies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144

Right side assemblies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168

Left side assemblies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182

Rear assemblies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195

Internal assemblies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200

7 Troubleshooting

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211

Troubleshooting process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 212

Printer error troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217

Paper path troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 237

Image formation troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243

HP ColorSmart II . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 246

Matching colors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 247

Four-color printing (CMYK). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 248

Image defects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 253

Overhead transparency defects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 263

Repetitive defects troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 265

Interface troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .268

Control panel troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 271

Troubleshooting tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 285

Service mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 293

Diagnostics mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .300

Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 308

8 Parts and diagrams

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 324

Ordering parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 325

Illustrations and parts lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 329

Alphabetical parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 355

Numerical parts list. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 359

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List of Figures

Figure 1-1 HP Color LaserJet 4500 family printers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Figure 1-2 HP Color LaserJet 4550 series printers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Figure 1-3 Model and Serial number information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Figure 1-4 Sample label . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Figure 1-5 Space requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

Figure 1-6 Front view, HP Color LaserJet 4500 and HP Color LaserJet 4550

(shown with 500-sheet paper feeder and duplex unit) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

Figure 1-7 Rear view, HP Color LaserJet 4500 (shown with 500-sheet paper feeder and duplex unit) . . . . .26

Figure 1-8 Rear view, HP Color LaserJet 4550 (shown with 500-sheet paper feeder and duplex unit) . . . . .27

Figure 3-1 Package contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48

Figure 3-2 Parallel cable with a “C” connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58

Figure 4-1 Imaging drum life . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .81

Figure 4-2 OPC life . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82

Figure 4-3 Location of consumables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .84

Figure 4-4 Removing the formatter board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .98

Figure 4-5 Do not remove the DIMM in slot #4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .99

Figure 4-6 Do not remove the DIMM in slot #3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .99

Figure 4-7 EDO and SDRAM memory modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .99

Figure 5-1 Basic system operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .103

Figure 5-2 Image formation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .104

Figure 5-3 Primary charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .105

Figure 5-4 Laser exposure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .106

Figure 5-5 Development . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .106

Figure 5-6 Primary transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .107

Figure 5-7 Secondary transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .108

Figure 5-8 Separation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .108

Figure 5-9 ITB residual toner cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .109

Figure 5-10 Waste toner to waste toner reservoir . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .109

Figure 5-11 Fuser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .110

Figure 5-12 Toner density sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .111

Figure 5-13 Photosensitive drum cartridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .112

Figure 5-14 Waste toner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .113

Figure 5-15 Transfer unit function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .113

Figure 5-16 Home position detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .114

Figure 5-17 ITB unit life detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .115

Figure 5-18 Secondary transfer roller unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .116

Figure 5-19 ITB unit contact/separation unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .117

Figure 5-20 Toner carousel assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .118

Figure 5-21 Toner carousel operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .119

Figure 5-22 Toner cartridge contact/separation function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .119

Figure 5-23 Toner level detection/toner cartridge detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .120

Figure 5-24 Laser/scanner operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .121

Figure 5-25 Paper jam sensors (shown with the optional 500-sheet paper feeder and duplex

unit installed) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .122

Figure 5-26 Tray 2 (cassette) operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .123

Figure 5-27 Tray 1 manual feed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .124

Figure 5-28 Laser paper detected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .125

Figure 5-29 Overhead transparency sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .125

Figure 5-30 Pick-up and feed system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .126

Figure 5-31 Fusing and delivery unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .127

Figure 5-32 Reversing and duplex pick-up operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .128

Figure 5-33 Reversing operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .129

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Figure 5-34 Side registration adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130

Figure 5-35 Duplex feed roller pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130

Figure 5-36 DC controller PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132

Figure 5-37 Motors and fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133

Figure 6-1 Phillips and Posidriv screwdriver comparison . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140

Figure 6-2 Top cover removal and replacement (rear view of printer) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144

Figure 6-3 Left side cover removal and replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145

Figure 6-4 Right side cover removal and replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146

Figure 6-5 Rear door removal and replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147

Figure 6-6 Right rear cover removal and replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148

Figure 6-7 Drum drawer (top drawer) cover removal and replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149

Figure 6-8 Drum drawer (top drawer) cover tabs and levers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150

Figure 6-9 ITB drawer (middle drawer) cover removal and replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . 151

Figure 6-10 ITB drawer (middle drawer) removal and replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152

Figure 6-11 Control panel removal and replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153

Figure 6-12 Front right cover removal and replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155

Figure 6-13 RFI shield removal and replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156

Figure 6-14 Laser/scanner assembly removal and replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157

Figure 6-15 DC controller removal and replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158

Figure 6-16 Developing PCB removal and replacement (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159

Figure 6-17 Developing PCB removal and replacement (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160

Figure 6-18 Top cover switch assembly removal and replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162

Figure 6-19 Top cover switch assembly removal and replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162

Figure 6-20 Drum drawer (top drawer) switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163

Figure 6-21 Drum drawer (top drawer) assembly removal and replacement (1 of 3) . . . . . . . . . . . . . . . . . . 164

Figure 6-22 Drum drawer (top drawer) assembly removal and replacement (2 of 3) . . . . . . . . . . . . . . . . . . 165

Figure 6-23 Drum drawer assembly removal and replacement (3 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . 165

Figure 6-24 Densitometer removal and replacement (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166

Figure 6-25 Densitometer removal and replacement (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167

Figure 6-26 Formatter removal and replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168

Figure 6-27 Formatter pan assembly removal and replacement (1 of 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . 170

Figure 6-28 Formatter pan assembly removal and replacement (2 of 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . 171

Figure 6-29 Formatter pan assembly removal and replacement (3 of 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . 171

Figure 6-30 Formatter pan assembly removal and replacement (4 of 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . 172

Figure 6-31 Power supply removal and replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173

Figure 6-32 High-voltage power supply removal and replacement (newer version

HP Color LaserJet 4500 and HP Color LaserJet 4550 printers) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174

Figure 6-33 High-voltage power supply removal and replacement (older version

HP Color LaserJet 4500 printers) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175

Figure 6-34 Drum drive assembly removal and replacement (1 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176

Figure 6-35 Drum drive assembly removal and replacement (2 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177

Figure 6-36 Drum drive assembly removal and replacement (3 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177

Figure 6-37 Large fan removal and replacement (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178

Figure 6-38 Large fan removal and replacement (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178

Figure 6-39 Toner level sensor assembly removal and replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179

Figure 6-40 Carousel drive assembly removal and replacement (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . 180

Figure 6-41 Carousel drive assembly removal and replacement (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . 180

Figure 6-42 Paper size switch removal and replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181

Figure 6-43 Switch plate assembly removal and replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182

Figure 6-44 Paper feed PCB removal and replacement (1 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183

Figure 6-45 Paper feed PCB removal and replacement (2 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183

Figure 6-46 Paper feed PCB removal and replacement (3 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184

Figure 6-47 Fuser motor removal and replacement (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185

Figure 6-48 Fuser motor removal and replacement (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186

Figure 6-49 Paper path motor removal and replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187

Figure 6-50 Paper pick solenoid removal and replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188

Figure 6-51 ITB cleaning roller clutch removal and replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189

Figure 6-52 ITB clutch assembly removal and replacement (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190

Figure 6-53 ITB clutch assembly removal and replacement (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190

viii

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Figure 6-54 Transfer roller cam clutch removal and replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .192

Figure 6-55 Left side gears removal and replacement (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .194

Figure 6-56 Left side gears removal and replacement (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .194

Figure 6-57 Large right side fan removal and replacement (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .195

Figure 6-58 Large right side fan removal and replacement (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .196

Figure 6-59 Left side fan removal and replacement (1 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .197

Figure 6-60 Left side fan removal and replacement (2 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .198

Figure 6-61 Left side fan removal and replacement (3 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .198

Figure 6-62 Rear paper path assembly removal and replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .199

Figure 6-63 Cartridge carousel replacement - formatter pan assembly (1 of 6) . . . . . . . . . . . . . . . . . . . . . .200

Figure 6-64 Cartridge carousel replacement - continuous toner level sensor assembly (2 of 6) . . . . . . . . .201

Figure 6-65 Cartridge carousel replacement - carousel brake (3 of 6) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .201

Figure 6-66 Cartridge carousel replacement - face-down delivery rod (4 of 6) . . . . . . . . . . . . . . . . . . . . . . .202

Figure 6-67 Cartridge carousel replacement - right-side carousel mounting plate (5 of 6) . . . . . . . . . . . . . .202

Figure 6-68 Cartridge carousel replacement - lift out the cartridge carousel (6 of 6) . . . . . . . . . . . . . . . . . .203

Figure 6-69 Paper transport assembly removal and replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .204

Figure 6-70 Paper pick rollers removal and replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .205

Figure 6-71 Star wheel assembly removal and replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .206

Figure 6-72 Transfer roller removal and replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .207

Figure 6-73 Cam shaft removal and replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .208

Figure 7-1 Troubleshooting flowchart (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .214

Figure 7-2 Troubleshooting flowchart (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .215

Figure 7-3 Jam sensors (shown with the optional 500-sheet paper feeder and duplex unit installed) . . . . .237

Figure 7-4 Jam locations (shown with the optional 500-sheet paper feeder and duplex unit installed) . . . .238

Figure 7-5 Jam locations by error message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .239

Figure 7-6 Image formation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .243

Figure 7-7 Color balance calibration page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .251

Figure 7-8 Repetitive defect ruler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .266

Figure 7-9 Imaging drum exposed to light (proportions not to scale) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .267

Figure 7-10 HP EIO configuration page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .268

Figure 7-11 4500 series menu map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .271

Figure 7-12 4550 series menu map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .272

Figure 7-13 4500 series (left) and 4550 series (right) printer configuration page . . . . . . . . . . . . . . . . . . . . .287

Figure 7-14 Supplies status page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .290

Figure 7-15 Usage page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .291

Figure 7-16 Hard disk file directory page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .292

Figure 7-17 Service mode menu map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .293

Figure 7-18 HP Color LaserJet 4500 series Service menu map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .294

Figure 7-19 HP Color LaserJet 4550 series Service menu map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .295

Figure 7-20 Registration page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .298

Figure 7-21 Location of the engine test button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .306

Figure 7-22 Sensor locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .308

Figure 7-23 Printer solenoids and clutches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .309

Figure 7-24 Printer motors and fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .310

Figure 7-25 Miscellaneous sensors and clutches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .310

Figure 7-26 Intermediate transfer belt sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .311

Figure 7-27 Miscellaneous sensors (with tray 1 front cover removed) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .312

Figure 7-28 PS6 and PS7 sensor location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .312

Figure 7-29 Miscellaneous switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .313

Figure 7-30 Miscellaneous switches and sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .313

Figure 7-31 PS14 sensor location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .314

Figure 7-32 Miscellaneous parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .314

Figure 7-33 Imaging drum connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .315

Figure 7-34 Rear door interlock switch defeat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .316

Figure 7-35 Right rear fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .316

Figure 7-36 Fuse (F1) and CB101 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .317

Figure 7-37 Fusing assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .317

Figure 7-38 DC controller PCB connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .318

Figure 7-39 Location of connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .319

Page 12

Figure 7-40 Location of duplexer and 500-sheet paper feeder connectors . . . . . . . . . . . . . . . . . . . . . . . . . 320

Figure 7-41 500-sheet feeder wiring diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 321

Figure 8-1 Assembly location diagram (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 330

Figure 8-2 Assembly location diagram (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 331

Figure 8-3 PCB locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 332

Figure 8-4 External covers, panels, etc. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 334

Figure 8-5 Top cover assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 336

Figure 8-6 Internal components (1 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 337

Figure 8-7 Internal components (2 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 339

Figure 8-8 Internal components (3 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 340

Figure 8-9 Developing carousel assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 342

Figure 8-10 Paper pick-up assembly (1 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 344

Figure 8-11 Paper pick-up assembly (2 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 346

Figure 8-12 Paper pick-up assembly (3 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 348

Figure 8-13 Upper drawer assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 350

Figure 8-14 MP tray paper pick-up assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 351

Figure 8-15 250-sheet cassette . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 352

Figure 8-16 500-sheet paper feeder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 353

Figure 8-17 Duplex unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 354

Page 13

List of Tables

Table 1-1 Printer features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Table 1-2 Model names and numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Table 1-3 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

Table 1-4 Environmental specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

Table 1-5 Consumable storage requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

Table 1-6 Printer dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

Table 1-7 Acoustic emissions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

Table 1-8 Supported media specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

Table 1-9 Printing on transparencies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

Table 2-1 Related documentation and software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43

Table 3-1 Printer security levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74

Table 4-1 Cleaning the printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78

Table 4-2 Approximate replacement interval for consumable items . . . . . . . . . . . . . . . . . . .83

Table 5-1 Toner carousel assembly components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .118

Table 5-2 Motors, solenoids, sensors, and switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .124

Table 5-3 Motors, solenoids, clutches, and sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .124

Table 5-4 Solenoids, sensors, switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .126

Table 5-5 Paper size detection switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .127

Table 5-6 Fusing and delivery unit components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .128

Table 5-7 Motors, solenoids, and sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .129

Table 5-8 Motor and fan locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .133

Table 6-1 Types of screws . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .141

Table 6-2 Approximate replacement interval for consumable items . . . . . . . . . . . . . . . . . .142

Table 7-1 Pre-troubleshooting checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .213

Table 7-2 Alphabetical printer error messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .217

Table 7-3 Numerical printer error messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .226

Table 7-4 HP Color LaserJet 4500 jam locations and associated error messages . . . . . . .239

Table 7-5 HP Color LaserJet 4550 jam locations and associated error messages . . . . . . .240

Table 7-6 Explanation of alternating message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .240

Table 7-7 Image defect table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .253

Table 7-9 Defect spacing chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .267

Table 7-10 Communications check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .268

Table 7-11 HP Color LaserJet 4500 Information Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . .273

Table 7-12 HP Color LaserJet 4550 Information Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . .273

Table 7-13 HP Color LaserJet 4500 Paper Handling Menu . . . . . . . . . . . . . . . . . . . . . . . . .274

Table 7-14 HP Color LaserJet 4550 Paper Handling Menu . . . . . . . . . . . . . . . . . . . . . . . . .275

Table 7-15 HP Color LaserJet 4500 Configuration settings . . . . . . . . . . . . . . . . . . . . . . . . .276

Table 7-16 HP Color LaserJet 4550 Configuration settings . . . . . . . . . . . . . . . . . . . . . . . . .277

Table 7-17 HP Color LaserJet 4500 Printing Menu settings . . . . . . . . . . . . . . . . . . . . . . . .278

Table 7-18 HP Color LaserJet 4550 Printing Menu settings . . . . . . . . . . . . . . . . . . . . . . . .279

Table 7-19 HP Color LaserJet 4500 I/O Menu settings . . . . . . . . . . . . . . . . . . . . . . . . . . . .280

Table 7-20 HP Color LaserJet 4550 I/O Menu settings . . . . . . . . . . . . . . . . . . . . . . . . . . . .280

Table 7-21 HP Color LaserJet 4500 Calibration Menu settings . . . . . . . . . . . . . . . . . . . . . .281

Table 7-22 HP Color LaserJet 4550 Calibration Menu settings . . . . . . . . . . . . . . . . . . . . . .281

Table 7-23 HP Color LaserJet 4500 Resets Menu settings . . . . . . . . . . . . . . . . . . . . . . . . .282

Table 7-24 HP Color LaserJet 4550 Resets Menu settings . . . . . . . . . . . . . . . . . . . . . . . . .282

Table 7-25 HP Color LaserJet 4550 Quick Copy Jobs menu . . . . . . . . . . . . . . . . . . . . . . . .283

Table 7-26 HP Color LaserJet 4550 Private/Stored Jobs menu . . . . . . . . . . . . . . . . . . . . .284

Table 7-27 Formatter diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .300

Table 7-28 Engine diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .302

Table 7-29 Paper path sensors and switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .303

Table 7-30 Paper size settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .304

Contents xi

Page 14

Table 7-31 Sensor status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 304

Table 7-32 Sensor function and locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 308

Table 7-33 Solenoid and clutch functions and locations . . . . . . . . . . . . . . . . . . . . . . . . . . . 309

Table 7-34 Printer motors and fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 310

Table 7-35 Miscellaneous sensors and clutches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 311

Table 7-36 Intermediate transfer belt sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 311

Table 7-37 PS3 and PS4 description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 312

Table 7-38 PS6 and PS7 description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 312

Table 7-39 Switch description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 313

Table 7-40 SW2, SW5, and PS13 description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 313

Table 7-41 Density sensor location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 314

Table 7-42 Miscellaneous parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 314

Table 7-43 Imaging drum connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 315

Table 7-44 Fuse F1 and CB101 location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 317

Table 7-45 110-volt fusing assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 317

Table 8-1 Consumables, accessories, and supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 325

Table 8-2 Types of screws . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 328

Table 8-3 PCB assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 333

Table 8-4 Printer cover and door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 335

Table 8-5 Top cover components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 336

Table 8-6 Internal components (1 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 337

Table 8-7 Internal components (2 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 339

Table 8-8 Internal components (3 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 341

Table 8-9 Developing carousel assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 343

Table 8-10 Paper pick-up assembly (1 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 345

Table 8-11 Paper pick-up assembly (2 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 346

Table 8-12 Paper pick-up assembly (3 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 348

Table 8-13 Upper drawer assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 350

Table 8-14 MP tray paper pick-up assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 351

Table 8-15 250-sheet cassette . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 352

Table 8-16 500-sheet paper feeder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 353

Table 8-17 Duplex unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 354

Table 8-18 Alphabetical parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 355

Table 8-19 Numerical parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 359

xii

Page 15

1 Printer description

Chapter contents

Printer features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Model and serial numbers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Power and regulatory information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Site requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

Space requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Electrical specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Environmental specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

Consumable storage requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Printer specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

Printer assemblies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

Media requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

Selecting print media . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

Media specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

Supported media weights and sizes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

Non-supported media . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

Printing on special media . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

Environmental Product Stewardship Program. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Regulatory statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36

HP Color LaserJet 4500 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36

HP Color LaserJet 4550 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36

Safety information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

Laser safety statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

Material Safety Data Sheet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

Toner safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

Laser statement for Finland . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

C7085-90921 Chapter 1 Printer description 13

Page 16

Printer features

The HP LaserJet 4500 printer family pictured in Figure 1-1 has three models.



The HP LaserJet 4500 printer is the base model; it contains 32 MB of RAM.



The HP LaserJet 4500 N printer is the base model with an HP JetDirect 600N print server (network card) and 64 MB of RAM.



The HP LaserJet 4500 DN printer is the base model with an HP JetDirect 600N print server (network card), a 500-sheet paper feeder, a duplex unit, and 64 MB of RAM.

Figure 1-1 HP Color LaserJet 4500 family printers

1 HP Color LaserJet 4500 and 4500 N printers 2 HP Color LaserJet 4500 DN printer

The HP LaserJet 4550 printer family pictured in Figure 1-2 has four models.



The HP LaserJet 4550 printer is the base model; it includes 64 MB of RAM.



The HP LaserJet 4550N printer is the base model with an HP JetDirect 610N print server (network card) and 64 MB of RAM.



The HP LaserJet 4550N printer is the base model with an HP JetDirect 610N print server (network card), a 500-sheet paper feeder, a duplex unit, and 64 MB of RAM.



The HP LaserJet 4550N printer is the base model with a 6 GB hard drive, an HP JetDirect 610N print server (network card), a 500-sheet paper feeder, a duplex unit, and 64 MB of RAM.

14 Printer description C7085-90921

Page 17

Figure 1-2 HP Color LaserJet 4550 series printers

1 HP Color LaserJet 4550 and 4550N printers 2 HP Color LaserJet 4550DN and 4550HDN printers

This printer series combines the quality and reliability of Hewlett-Packard printers with the features listed in Table 1-1.

WWW For more information about printer features, ref er to the Hewlett-Pac kard website at http://www.hp .com.

Table 1-1 Printer features Feature Description

Connectivity

Duplex



Bidirectional parallel port (requires a “C” connector)



Two enhanced input/output (EIO) slots



Optional HP JetDirect 600N print server (network card) (included with the HP Color LaserJet 4500 N and 4500 DN printers)



Optional HP JetDirect 610N print server (network card) (included with the HP Color LaserJet 4550N, 4550DN and 4550HDN printers)



HP Color LaserJet 4550 series: Infrared receiver port



HP Color LaserJet 4550 series: Embedded Web server



Optional duplex unit; mounts directly beneath the printer for two-sided printing (duplex unit is standard with the HP Color LaserJet 4500DN, 4550DN and 4550HDN)

Note Requires 40 MB of memory; 64 MB of memory

is recommended for optimal duplex printing. If the 500-sheet paper feeder (T ra y 3) is installed,

the duplex unit must be positioned between the printer and Tray 3.

Environmental

Fonts

C7085-90921 Chapter 1 Printer description 15



PowerSave setting



High content of recyclable components and materials



80 internal fonts

Page 18

Table 1-1 Printer features (continued) Feature Description



CPU

Memory—standard HP Color LaserJet 4500 series:

The Color LaserJet 4500 series formatter PCB incorportates a 133 MHz RISC processor



The Color LaserJet 4550 series formatter PCB incorporates a 233 MHz RISC processor



32 MB RAM (Base)



64 MB RAM (HP Color LaserJet 4500 N/4500 DN)



Memory Enhancement T echnology (MEt), which automatically compresses data to use RAM more efficiently

HP Color LaserJet 4550 series:



64 MB RAM (Base)



128 MB RAM (HP Color LaserJet 4550DN and HDN)



Memory Enhancement T echnology (MEt), which automatically compresses data to use RAM more efficiently

Memory—optional



HP Color LaserJet 4500 series: Install 4, 8, 16, 32, or 64 MB DIMMs into the three DIMM slots to a possible total 208 MB. Synchronous SDRAM modules do not need to be configured in pairs (in corresponding left and right slots). If you install more than 208 MB of RAM, it will not be used by the printer.



HP Color LaserJet 4550 series: Install 64 or 128 MB DIMMS into the two DIMM slots to a possible total of 192 MB. If you install more than 192 MB of RAM, it will not be used by the printer.



HP Color LaserJet 4550 series: 5 GB hard disk drive (Included wit the HP Color LaserJet 4550HDN printer).

CAUTION: The HP Color LaserJet 4500 series uses 100-pin, non-parity, SDRAM DIMMs. The HP Color LaserJet 4550 series uses 168-pin, non-parity, synchronous DRAM DIMMs. Extended Data Output (EDO) DIMMs are not supported.

16 Printer description C7085-90921

Page 19

Table 1-1 Printer features (continued) Feature Description

Paper handling—input tray capacity

The capacities will vary depending on the media being used (for example, transparencies, labels, heavy media, and envelopes). Quantities based on 75 g/m

(20 lb) media for both the HP Color

LaserJet 4500 and 4550 printers:



Tray 1: 150-sheet multipurpose tray



Tray 2: 250-sheet standard cassette



Tray 3: Optional 500-sheet paper feeder (included with the HP Color LaserJet 4500DN, 4550DN and HDN models)

Paper handling—output (face-down, correct-order output)



Top output bin holds up to 250 sheets of standard paper.



Rear output bin holds up to 100 sheets of standard paper. (The output of the rear output bin is in reverse order, facing up.)

Printer-language support HP Color LaserJet 4500 series:



HP PCL5c



PostScript™ Emulation



Automatic language switching

HP Color LaserJet 4550 series:



HP PCL 5c



HP PCL 6



PostScript™ 3 Emulation



Automatic language switching

Paper sizes supported

Print speed— monochrome printing

Print speed— color printing



A4/Letter



Legal



Executive



JIS B5



Custom (B5 ISO)



16 pages per minute (ppm)



8 ppm for transparencies, heavy paper, and glossy paper



4 ppm



2 ppm for transparencies, heavy paper, and glossy paper

Standard interfaces The printer comes equipped with two EIO slots.

Note If the printer is not configured with a network

interface card, connect the printer using a bidirectional parallel cable (IEEE-1284 compliant) with a “C” connector.

C7085-90921 Chapter 1 Printer description 17

Page 20

Identification

Model and serial numbers

The model number and serial numbers are listed on identification labels located on the rear of the printer. The model number is alphanumeric, such as C4084A for the HP Color LaserJet 4500. The serial number contains information about the country of origin, the printer version, production code, and the production number of the printer (see Figure 1-3). For information on determining the version of printer you are servicing, see page 140.

country of origin

Figure 1-3 Model and Serial number information

printer version

production code

production numbe

Table 1-2 Model names and numbers

Model Name Model Number

HP Color LaserJet 4500 C4084A HP Color LaserJet 4500 N C4089A HP Color LaserJet 4500 DN C4094A HP Color LaserJet 4550 C7085A HP Color LaserJet 4550N C7086A HP Color LaserJet 4550DN C7087A HP Color LaserJet 4550HDN C7088A

Note T wo v ersions of the HP Color LaserJet 4500 series printers are available. Bef ore servicing the printer

or ordering parts, you will need to identify which printer version you are servicing. For more information, see page 140. The HP Color LaserJet 4550 series printer, unless otherwise specified, is equivalent to the later version of the HP Color LaserJet 4500 series printer.

18 Printer description C7085-90921

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Power and regulatory information

The identification labels on the rear of the printer also contain power rating and regulatory information as shown in Figure 1-4.

CAUTION Converting the voltage on the printer can damage the printer. Do not use any voltage other than the

operating voltage. An y attempt to convert operating voltages will void the product warranty (f or example, attempting to change a 110V printer to a 220V printer).

Figure 1-4 Sample label

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Site requirements

The printer must be kept in a proper location to maintain the performance lev el that has been set at the factory. In particular, be sure that the environment adheres to the specifications listed in this chapter.

Below are recommendations for the printer location and placement. Make sure the printer has the following:



a well-ventilated, dust-free area



a hard, level surface (not more than a 2° angle):

• for the HP Color LaserJet 4500 and 4500N, the surface must support 51 kg (112 lb)

• for the HP Color LaserJet 4500DN, the surface must support 77 kg (169 lb)

• for the HP Color LaserJet 4550 and 4550N, the surface must support 51 kg (112 lb)

• for the HP Color LaserJet 4550DN and 4550HDN, the surface must support 77 kg (169 lb)



a level surface that supports all four corners of the 500-sheet paper feeder



a constant temperature and humidity (Do not install near water sources, humidifiers, air conditioners, refrigerators, or other major appliances)

Make sure to keep the printer:



away from direct sunlight, dust, open flames, or ammonia fumes.



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



away from walls or other objects. There must be enough space around the printer for proper access and ventilation. See Figure 1-5 on page 21.

20 Printer description C7085-90921

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Space requirements

The printer must have the following amounts of space above and around it.

Figure 1-5 Space requirements

1 Top view 2 Side view

C7085-90921 Chapter 1 Printer description 21

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Electrical specifications

Table 1-3 lists the electrical specifications required to run the printer safely.

Table 1-3 Electrical specifications

Item 110-volt models 220-volt models

Power requirements 100-127 V (+/- 10%)

50/60 Hz (+/- 2 Hz)

Power consumption (typical)

During printing During standby During PowerSave Off

Minimum recommended circuit capacity for typical product

When the printer is in standby (off) mode, it continues to consume a minimal amount of energy.

470 W (average) 80 W (average) 4500: 32 W 4550: 0 W

4500: 16.0 A at 120 V 4550: 10.2 A at 120 V

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

480 W (average) 90 W (average) 4500: 32W 4550: 0 W

4500: 7.1 A at 220 V 4550: 5.1 A at 220 V

Note This information is preliminary and might not be current. Please see http://www.hp.com/support/

lj4550 for current information.

Environmental specifications

Keep the printer within the environmental conditions shown in Table 1-4 for optimum performance.

Table 1-4 Environmental specifications

Item Operating

Temperature

Recommended Allowed

Humidity

Recommended Allowed

Altitude

Allowed 0 to 3100 m

20° to 26° C (68° to 79° F) 15° to 30° C (59° to 86° F)

20% to 50% RH 10% to 80% RH

(0 to 10,000 ft)

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Consumable storage requirements

The life of consumables is greatly affected by their storage environment. Use Table 1-5 to determine the shelf life of stored consumables.

Table 1-5 Consumable storage requirements

Item Storage time Storage condition

Temperature Normal (maximum of

Maximum temperature change rate

Humidity Normal (maximum of

Atmospheric pressure 460 to 760 mm Hg (18.1 to 29.9 in Hg) Average storage time 1 year

Printer specifications

Table 1-6 describes the dimensions of the printer.

Table 1-6 Printer dimensions

HP Color LaserJet 4500, 4500N

0° to 35° C (32° to 95°

2.5 years) Severe (maximum of

18 days)

40° to 15° C (104° to 59° F) within 3 minutes

-20° to 25° C (-4° to 77° F) within 3 minutes

2.5 years) Severe (maximum of

18 days)

HP Color LaserJet 4500 DN

F) High 35° to 40° C (95°

to 104° F) Low 0° to -20° C (32° to -4° F)

35% to 85% RH

High 85% to 95% RH Low 10% to 35% RH

HP Color LaserJet 4550, 4500N

HP Color LaserJet 4550DN, 4550HDN

Height 395 mm (15.6 inches) 578 mm (22.8 inches) 395 mm (15.6 inches) 578 mm (22.8 inches) Width 500 mm (19.7 inches) 500 mm (19.7 inches) 500 mm (19.7 inches) 500 mm (19.7 inches) Depth 559 mm (22 inches) 709 mm (27.9 inches) 559 mm (22 inches) 709 mm (27.9 inches) Weight 57 kg (125 lb) 75 kg (165 lb) 57 kg (125 lb) 75 kg (165 lb)

Table 1-7 lists the acoustic emissions of the printer when it is printing and when it is in standby mode.

Table 1-7 Acoustic emissions

HP Color LaserJet 4500 Series HP Color LaserJet 4550 Series

Operating position

Printing Standby

Bystander 1m

Printing Standby

Sound power

Printing Standby

Per ISO 9296, DIN 45635, T.19

58 dB(A)

49 dB(A)

Per ISO 7779, DIN 45635, T.19

52 dB(A)

45 dB(A)

Per ISO 9296

= 6.6 bels(A)

WAd

= 5.8 bels(A)

WAd

Per ISO 9296, DIN 45635, T.19

56 dB(A)

48 dB(A)

Per ISO 7779, DIN 45635, T.19

52 dB(A)

44 dB(A)

Per ISO 9296

= 6.7 bels(A)

WAd

= 5.3 bels(A)

WAd

C7085-90921 Chapter 1 Printer description 23

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Note This product emits a sound intensity level, L

in close proximity to users. Maximum duty cycle is 35,000 pages per month.

, at 6.4 bel during printing. Do not place the printer

WAd

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Printer assemblies

Figures 1-6 and 1-7 show the location of each major assembly in the printer. These assemblies are described in Chapter 3.

Figure 1-6 Front view, HP Color LaserJet 4500 and HP Color LaserJet 4550

(shown with 500-sheet paper feeder and duplex unit)

1 Top output bin 2 Printer control panel 3 Power switch (standby button)

4 Duplex unit drawer (optional on 4500, 4500N, 4550 and 4550N models) 5 Tray 3 (500-sheet tray; optional on 4500, 4500N, 4550 and 4550N models) 6 Tray 2 (250-sheets standard tray) 7 Intermediate Transfer Belt (ITB) drawer (transfer belt access) 8 Tray 1 (150-sheet multipurpose tray) 9 Drum drawer (imaging drum access) 10 Top cover release (toner access) button 11 Toner cartridge access cover

C7085-90921 Chapter 1 Printer description 25

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Figure 1-7 Rear view, HP Color LaserJet 4500 (shown with 500-sheet paper feeder and duplex unit)

1 Rear door (fuser access) 2 Rear output bin door 3 Cover for duplex unit 4 Power receptacle for duplex unit 5 Duplex unit power cord to the printer 6 Printer power receptacle 7 EIO slots 8 Parallel connector (“C” connector) 9 Memory access

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Figure 1-8 Rear view, HP Color LaserJet 4550

1 Rear door (fuser access) 2 Rear output bin door 3 Cover for duplex unit 4 Power receptacle for duplex unit 5 Duplex unit power cord to the printer

(shown with 500-sheet paper feeder and duplex unit)

6 Printer power receptacle 7 EIO slots 8 Parallel connector (“C” connector) 9 Memory access

C7085-90921 Chapter 1 Printer description 27

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Media requirements

Selecting print media

You can use many types of paper and other print media with this printer. This section provides guidelines and specifications for selecting and using different print media.

Before purchasing any media or specialized forms in quantity, verify that your paper supplier obtains and understands the print media requirements specified in the HP LaserJet Family Print Media Guide. The guide is available through HP Direct. See the online user guide for ordering information.

It is possible that media could meet all of the guidelines in this chapter and still not print satisfactorily. This may be a result of abnormal characteristics of the printing environment or to other variables over which Hewlett-Packard has no control (for example, extremes in temperature and humidity).

Hewlett-Packard recommends testing any media before buying it in large quantities.

CAUTION Using media that does not conform to the specifications listed here and in the HP LaserJet Family

Print Media Guide can cause problems that require service. This service is not covered by the

Hewlett-Packard warranty or service agreements.

Media specifications

For optimum results, use con v entional 75 g/m2 (20 lb) xerographic paper. Verify that the paper is of good quality and is free of cuts, nicks, tears, spots, loose particles, dust, wrinkles, curls, or bent edges. Avoid fanning the print media before loading it into the paper trays.

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Supported media weights and sizes

Table 1-8 shows the media types and sizes supported by the printer and the printer accessories.

Table 1-8 Supported media specifications

Tray Supported media Media

specifications

Tray 1 Paper

A4/Letter Legal Executive JIS B5 A5

Custom Minimum size: 76 by 127 mm (3 by 5 in) Maximum size: 216 by 356 mm (8.5 by 14 in)

Transparencies A4/Letter Glossy Paper

Envelopes (Tray 1 only)

Com10

Monarch

B5 (JIS)

Single-sided: If less than or equal

to 148 mm width:

60 to 176 g/m (16 to 47 lb)

If more than or equal to 148 mm width:

60 to 135 g/m (16 to 36 lb bond)

Two-sided:

64 to 105 (17 to 28 lb bond)

0.13 mm (5 mil) 120 g/m (32 lb/80 lb text)

Maximum weight:

90 g/m bond)

(24 lb

g/m

Capacity

150 sheets of 75 g/m (20 lb) paper

Do not load more than the maximum stack height of 15 mm (0.6 in)

Limit of 50 Limit of 50 sheets

Limit of 10

Labels (Tray 1 only)

Cardstock (postcards) (Tray 1 only)

Tray 2* Paper

A4/Letter

Legal

Executive

JIS B5

Custom (B5 ISO)** Transparencies

Glossy Paper

Maximum weight:

176 g/m

(47 lb

bond)

Maximum size:

200 mm by 148

(7.87 in by 5.82 in)

Single Sided

60 to 105 g/m (16 to 28 lb bond)

Two Sided:

64-105 g/m

(17-

28 lb. bond)

0.13 mm (5 mil) 120 g/m

(32 lb/80 lb text)

Limit of 50

Do not load more than the maximum stack height of 15 mm (0.6 in)

250 sheets of 75 g/m

(20 lb) paper

Limit of 50 transparencies Limit of 200 sheets glossy

C7085-90921 Chapter 1 Printer description 29

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Table 1-8 Supported media specifications (continued)

Tray Supported media Media

Capacity

specifications

Tray 3* (optional)

Duplex printing accessory (optional)

*Trays 2 and 3 do not support the range of custom sizes available in Tray 1. **Trays 2 and 3 use custom size, specifically for B5 ISO.

Paper

A4/Letter Legal Executive JIS B5 Custom (B5 ISO)**

Transparencies Glossy Paper

Paper

A4/Letter Legal Executive JIS B5

Single Sided

60 to 105 g/m (16 to 28 lb bond)

Two Sided:

64-105 g/m 28 lb. bond)

0.13 mm (5 mil) 120 g/m (32 lb/80 lb text)

64 to 105 g/m (17 to 28 lb bond)

(17-

500 sheets of 75 g/m2

(20 lb) paper

Limit of 50 transparencies Limit of 500 sheets glossy

Note Use only HP-supported transparencies (HP part number C2934A, Letter size; C2936A, A4 size).

Non-supported media

Use the following guidelines to avoid poor print quality or damage to your printer:



Do not use paper that is too rough.



Do not use paper that is embossed or coated unless it is specifically recommended for use in this printer.



Do not use paper with cutouts or perforations other than standard three-hole punched paper.



Do not use multipart forms.



Do not use paper with irregularities such as tabs or staples.



Do not use letterhead paper with low temperature dyes or thermography. Preprinted forms or letterhead must use inks that can tolerate temperatures of 190° C (374° F) for 0.1 second.



Do not use any media that produces hazardous emissions, or that melts, offsets, or discolors when exposed to 190° C (374° F) for 0.1 second.



Do not use paper that has already been printed on or fed through a photocopier or printer.



Do not use paper with a watermark if you are printing solid patterns.



Do not duplex on glossy paper. Doing so will result in jams and print-quality problems.



Do not use transparencies that are not specified for use with HP Color LaserJet printers.

30 Printer description C7085-90921

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Printing on special media

Use these guidelines when printing on special types of media.



For optimum results, use conventional 75 g/m2 (20 lb) xerographic paper.



Verify that the paper is of good quality and free of cuts, nicks, tears, spots, loose particles, dust, wrinkles, curls, or bent edges.

Transparencies

When printing on transparencies, use the following guidelines.



Do not send transparencies from Tray 2 to the rear output bin. The toner will be warm and may cause the transparencies to stick together.



Send transparencies to the top output bin.



Handle transparencies using the edges. Oils from your fingers can remain on the transparency and can cause print quality problems.



Use only overhead transparencies recommended for use in this printer. Table 1-9 describes the recommended specifications for transparencies.

CAUTION Do not use DeskJet (inkjet) transparencies in this printer. The transparencies can become o verheated

and melt, causing serious damage to your printer. Hewlett-Packard recommends using HP Color LaserJet Transparencies with this printer. HP products are designed to work together for optimum printing results.

Table 1-9 Printing on transparencies

Description Specifications

Electrical surface resistivity

Fusing compatibility Materials must not discolor, melt, offset, or release

Caliper (thickness) 0.12 mm (0.0048 in) to 0.13 mm (0.0052 in)

2.0 to 15 by 10 ohms per square inch

hazardous emissions when heated to 190° C (374° F) for 0.1 second.

Glossy paper

For optimum results when printing on glossy paper , select the glossy print setting in the printer driver. You can also use the printer control panel to set the media type to

GLOSS for the input tray you are

using. Because this setting affects all print jobs, it is important to return the printer to its original settings once your job has printed. See the section in the online user guide on configuring input trays.

Note Do not duplex on glossy paper. Doing so will result in jams and print quality problems.

Colored paper

Colored paper should be of the same high quality as white xerographic paper. Pigments used must be able to withstand the printer’s fusing temperature of 190° C (374° F) for 0.1 second without deterioration. Do not use paper with a colored coating that was added after the paper was produced.

The printer creates colors by printing patterns of dots, overlaying and varying their spacing to produce various colors. V arying the shade or color of your paper will aff ect the shades of y our printed colors.

C7085-90921 Chapter 1 Printer description 31

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Heavy paper

Use Tray 1 for paper that is 105-157 g/m2 (28-42 lb bond). For optimum results when printing on heavy paper , select the hea vy print setting in the printer driver. You can also use the printer control panel to set the media type to

HEAVY for the input tra y you are using. Because this setting aff ects all

print jobs, it is important to return the printer to its original settings once your job has printed.

CAUTION Do not use paper that is heavier than the recommended specification for this printer. Doing so can

cause misfeeds, jams, inferior print quality, and excessive mechanical wear. See Table 1-8 for supported paper types and sizes.

Envelopes

Envelopes can only be printed from Tray 1. For information about loading envelopes, see the section in the online user guide about loading envelopes into Tray 1.

Adhering to the following guidelines will help ensure proper printing of envelopes and help prevent printer jams:



Do not load more than 10 envelopes into Tray 1.



The weight rating of envelopes should not exceed 90 g/m2 (24 lb).



Envelopes should be flat.



Envelopes must not be wrinkled, nicked, or otherwise damaged.



Envelopes with peel-off adhesive strips must use adhesives that can withstand the heat and pressures of the printer’s fusing process.



Envelopes should be loaded with the flaps f acing a w a y f rom the printer and tow ard the left side of the printer.

CAUTION To prevent severe printer damage, do not use envelopes that have windows, clasps, snaps, or

synthetic materials.

Labels

Note To print labels, Hewlett-Packard recommends configuring Tra y 1 as a cassette and setting the tra y’s

media type to LABELS in the printer control panel. When printing labels, use the following guidelines:



Verify that the label’s adhesive material can tolerate temperatures of 190° C (374° F) for 0.1 second.



Verify that adhesive material is not exposed between the labels. Exposed areas can cause labels to peel off during printing, which can cause printer jams. Exposed adhesive can also cause damage to printer components.



Do not re-feed a sheet of labels.



Verify that labels lie flat.



Do not use labels that are wrinkled, bubbled, or otherwise damaged.

32 Printer description C7085-90921

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Preprinted forms and letterhead

Observe the following guidelines for best results with preprinted forms and letterhead.



Forms and letterhead must be printed with heat-resistant inks that will not melt, vaporize, or release hazardous emissions when subjected to the printer’s fusing temperature of approximately 190° C (374° F) for 0.1 second.



Inks must be non-flammable and should not adversely affect any printer rollers.



Forms and letterhead should be sealed in a moisture-proof wrapping to prev ent changes during storage.



Before you load preprinted paper such as forms and letterhead, verify that the ink on the paper is dry. During the fusing process, wet ink can come off of preprinted paper.

Recycled paper

This printer supports the use of recycled paper. Recycled paper must meet the same specifications as standard paper; refer to the HP LaserJet Family Print Media Guide, available through HP Direct. See the online user guide for ordering information. Hewlett-P ackard recommends that recycled paper contain no more than 5 percent groundwood.

C7085-90921 Chapter 1 Printer description 33

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Environmental Product Stewardship Program

Protecting the environment

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

This HP LaserJet printer design eliminates:



Ozone Emissions—This product has been designed to minimize ozone emissions and avoid the need for an ozone filter.



CFC Usage—Class I U.S. Clean Air Act stratospheric ozone-depleting chemicals (chlorofluorocarbons [CFCs], for example) have been eliminated from the manufacturing sites that produce this printer. This practice coincides with the 1987 “Montreal Protocol on Substances that Deplete the Ozone Layer” and its subsequent amendments. CFCs are not used in manufacturing of the packing.

This HP LaserJet printer design reduces:



Energy Consumption—Energy usage drops significantly from printing mode to PowerSave mode.

As an ENERGY STAR partner, HewlettPackard Company has determined that this product meets E Guidelines for energy efficiency.

NERGY STAR



Paper Use—The printer’s optional duplex printing accessory provides two-sided printing, reducing paper usage and the resulting demands on natural resources.

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



Plastics—Major plastic parts have markings that enhance the ability to identify plastics for recycling purposes at the end of the printer’s life.



HP Toner Cartridges/Photoconductive Drum—In many countries, this product’s toner cartridge/drum can be returned to HP at the end of its useful life. A prepaid shipping label and instructions on how to return the toner cartridge/drum are included with the replacement toner cartridge/drum. If your country is not listed in the replacement’s brochure, call your local HP Sales and Service Office for further instructions.

HP recycling program information:

This HP LaserJet printer also contributes to protecting the environment in the following ways:



HP LaserJet printing supplies—In many countries, this product's printing supplies (e.g., toner cartridge, drum, fuser) can be returned to HP through the HP Planet Partners Printing Supplies Environmental Program. An easy-to-use take-back component of the program is available in over 25 countries.

Multilingual program information and instructions are included in ev ery new HP LaserJet Toner Cartridge and Consumables box.



HP Planet Partners printing supplies environmental program—Since 1990, the HP LaserJet Toner Cartridge Recycling Program has collected more than 39 million used LaserJet toner cartridges that otherwise might have been discarded in the world’s landfills. The HP

34 Printer description C7085-90921

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LaserJet toner cartridges go to a collection center and are bulk-shipped to our recycling partners who disassemble the cartridge parts for recycling. Materials are separated and converted into raw materials for use by other industries to make a variety of useful products.



U.S. Recycling Returns—For a more environmentally responsible return of used cartridges and consumables, HP encourages the use of bulk returns. Simply bundle two or more cartridges together and use a single, prepaid, and pre-addressed UPS label that is supplied in the package.

WWW For more information, call (800) 340-2445 (U .S. only) or visit the HP LaserJet Supplies website at http:/

/www.hp.com/ljsupplies/planet_index.html.



Non-U.S. Recycling Returns—Non-U.S. customers should call the local HP Sales and Service Office for further information regarding availability of the HP Planet Partners LaserJet Toner Cartridge and Consumables Recycling Program.



Paper—This printer is suited for the use of recycled papers (according to DIN 19 309) when the paper meets the guidelines outlined in the HP LaserJet Family Print Media Guide.

For downloadable manuals, go to http://www.hp.com/support/lj4550

. When you connect, select Manuals. The user guide is provided on CD-ROM, which allo ws the same high-quality inf ormation to be provided without consuming the large quantities of energy and natural resources required to produce traditional paper manuals.

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



Extended Warranty—HP SupportPack provides coverage for the HP hardware product and all HP-supplied internal components. The hardware maintenance covers a three-year period from date of the HP product purchase. HP SupportPack must be purchased by the customer within 90 days of the HP product purchase.

WWW Information on HP SupportPack is av ailable on the W eb at http://www .hp .com/ under the HP Services

and Support section. International customers can contact the nearest HP-authorized reseller about this service.



Spare Parts and Consumables Availability—Spare parts and consumable supplies for this product will be made available for at least five years after production has stopped.

C7085-90921 Chapter 1 Printer description 35

Page 38

Regulatory statements

HP Color LaserJet 4500

For the most current regulatory statements regarding the HP Color LaserJet 4500 series, please see the HP Color LaserJet 4500 User Guide, or go to http://www.hp.com/cposupport/prodhome/ hpcolorlas7857.html.

HP Color LaserJet 4550

For the most current regulatory statements regarding the HP Color LaserJet 4550 series, please see the HP Color LaserJet 4550 User Guide, or go to http://www.hp.com/support/lj4550

36 Printer description C7085-90921

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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 1 August 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.

Material Safety Data Sheet

The Toner Cartridge/Drum Material Safety Data Sheet (MSDS) can be obtained by visiting the website at http://www .ljsupplies.com/planetpartners/datasheets.html see support information in this guide for appropriate phone numbers and information.

Toner safety

Hewlett-Packard encourages responsible disposal of HP LaserJet printer consumable items through its Environmental Collection Program. F or details on this program, see the recycling instruction guide enclosed with each consumable item.

. International customers should

Note In case of toner spills, skin and clothing are best cleaned by removing as much toner as possib le with

a dry tissue, then washing with cold water. Hot water causes toner to permanently set into clothing.

C7085-90921 Chapter 1 Printer description 37

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Laser statement for Finland

LASERTURVALLISUUS

Luokan 1 laserlaite

Klass 1 Laser Apparat

HP LaserJet 4500, 4550-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 (1994) 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 4500, 4550-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

38 Printer description C7085-90921

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2 Service approach

Chapter contents

Service approach . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40

Parts and supplies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

Ordering parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

Ordering consumables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

Exchange program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

Consumables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

World Wide Web. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

HP Service Parts Information Compact Disc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

HP Support Assistant Compact Disc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

Ordering related documentation and software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Warranty statement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44

Hewlett-Packard warranty statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44

Onsite service agreements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45

C7085-90921 Chapter 2 Service approach 39

Page 42

Service approach

Printer repair normally begins by using the printer’s internal diagnostics and the three-step process below.

Step 1 Isolate the problem to the major system (for example, the host computer, the network

Step 2 Determine if the problem is located in the accessories or in the printer engine. Step 3 Troubleshoot the problem using the procedures in Chapter 7.

Once a faulty part is located, the printer can usually be repaired at the assembly level by replacing field replaceable units (FRUs). Some mechanical assemblies might need to be repaired at the subassembly level. Hewlett-Packard does not support replacement of components on the printer circuit assembles.

or server, or the printer system).

40 Service approach C7085-90921

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Parts and supplies

Ordering parts

Field replaceable and accessory part numbers are found in Chapter 8 of this manual. Replacement parts can be ordered from HP’s Commercial Support Services Organization-Americas (CSSO-A) or HP’s Commercial Support Services Organization-Europe (CSSO-E).

Note Use only accessories specifically designed for this printer. Accessories can be ordered from an

authorized service or support provider. See “Ordering related documentation and software” on page 43 and “Ordering parts” on page 325 for additional ordering information.

By phone:



Commercial Support Services Organization-Americas (CSSO-A) (1)(800) 227-8164 (U.S. only)



Commercial Support Services Organization-Europe (CSSO-E) (49) (070) 3114-2253

By mail:

Hewlett-Packard Company CSSO-A 8050 Foothills Blvd. Roseville, CA 95678

Hewlett-Packard Company CSSO-E Wolf-Hirth Straße 33 D-7030 Böblingen, Germany

Ordering consumables

Consumables can be ordered directly from Hewlett-Packard. The phone numbers for ordering consumables are:



U.S. (800) 538-8787



Canada (800) 387-3154; Toronto (416) 671-8383



United Kingdom 0734-441212



Other local phone numbers may also be available

C7085-90921 Chapter 2 Service approach 41

Page 44

Exchange program

HP offers remanuf actured assemblies for some parts. These are identified in Chapter 8 and can be ordered through Commercial Support Services Organization-Americas (CSSO-A) or Commercial Support Services Organization-Europe (CSSO-E).

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 can be obtained from the following URL:

in the U.S.http://www.hp.com/go/support Printer drivers may be obtained from the f ollowing 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

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

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 checked via the World Wide Web at http://www.hp.com/go/partsinfo

HP Support Assistant Compact Disc

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

42 Service approach C7085-90921

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Ordering related documentation and software

Table 2-1 shows where to order related documentation and software. Telephone numbers for the various sources are:



Commercial Support Services Organization-Americas (CSSO-A) (800) 227-8164 (US only)



Commercial Support Services Organization-Europe (CSSO-E) (49) (070) 3114-2253



HP Distribution Center (HPD) (661) 257-5565. Fax: (805) 257-6995

Table 2-1 Related documentation and software

Description Part Number CSSO-A CSSO-E HPD

HP LaserJet Family Print Media Guide

HP JetDirect Print Server Administrator’s Guide

Technical reference package 5021-0377 X HP Color LaserJet 4500

Printer Drivers Disk HP Color LaserJet 4500,

4500 N documentation bundle (quick reference guide and getting started guide)

HP Color LaserJet 4500 DN documentation bundle (quick reference guide and getting started guide)

HP LaserJet 4550 Series Getting Started Guide

HP Color LaserJet 4550/4500 Series Quick Reference Service Guide

HP LaserJet 4550/4500 Series Service Manual

5963-7863 X

5969-6818 X X

C4084-60122

C4084-99021 X

C4094-99020 X

C7085-90901 X

5963-7921 X

C7085-90921 X X

HP Color LaserJet 4550/4500 Series Printer Service and Support CD-ROM

HP Color LaserJet 4550 Series Printer Online User Guide

C7085-90921 Chapter 2 Service approach 43

C7085-60102 X X

C7085-60101

Page 46

Warranty statement

Hewlett-Packard warranty statement

HP Color LaserJet 4500,1 year limited warranty 4500 N, 4500 DN Printer and 4550/4550N/4550DN/4550HDN Printer

1 HP warrants HP hardware, accessories and supplies against defects in materials and

workmanship for the period specified above. If HP receives notice of such defects during the warranty period, HP will, at its option, either repair or replace products which prove to be defective. Replacement products may be either new or like-new.

2 HP warrants that HP software will not fa il to ex ecute its progr amming instructions, for the period

specified above, due to def ects in material and workmanship when properly installed and used. If HP receives notice of such defects during the warranty period, HP will replace software media which does not execute its programming instructions due to such defects.

3 HP does not warrant that the operation of HP products will be uninterrupted or error free. If HP

is unable, within a reasonable time, to repair or replace any product to a condition as warranted, customer will be entitled to a refund of the purchase price upon prompt return of the product.

4 HP products may contain remanuf actured parts equivalent to new in performance or may hav e

been subject to incidental use.

5 The warranty period begins on the date of delivery or on the date of installation if installed by

HP. If customer schedules or delays HP installation more than 30 days after delivery, warranty begins on the 31st day from delivery.

6 Warranty does not apply to defects resulting from (a) improper or inadequate maintenance or

calibration, (b) software, interfacing, parts or supplies not supplied by HP, (c) unauthorized modification or misuse, (d) operation outside of the published environmental specifications for the product, or (e) improper site preparation or maintenance.

7 TO THE EXTENT ALLO WED BY LOCAL LA W, THE ABOVE W ARRANTIES ARE EXCLUSIVE

AND NO OTHER WARRANTY OR CONDITION, WHETHER WRITTEN OR ORAL, IS EXPRESSED OR IMPLIED AND HP SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES OR CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, AND FITNESS FOR A PARTICULAR PURPOSE.

8 HP will be liable for damage to tangible property per incident up to the greater of $300,000 or

the actual amount paid for the product that is the subject of the claim, and for damages for bodily injury or death, to the extent that all such damages are determined by a court of competent jurisdiction to have been directly caused by a defective HP product.

9 TO THE EXTENT ALLOWED BY LOCAL LAW, THE REMEDIES IN THIS WARRANTY

STATEMENT ARE CUSTOMER’S SOLE AND EXCLUSIVE REMEDIES. EXCEPT AS INDICATED ABOVE, IN NO EVENT WILL HP OR ITS SUPPLIERS BE LIABLE FOR LOSS OF DATA OR FOR DIRECT, SPECIAL, INCIDENTAL, CONSEQUENTIAL (INCLUDING LOST PROFIT OR DATA), OR OTHER DAMAGE, WHETHER BASED IN CONTRACT, TORT, OR OTHERWISE.

10 FOR CONSUMER TRANSA CTIONS IN A USTRALIA AND NEW ZEALAND: THE W ARRANTY

TERMS CONTAINED IN THIS STATEMENT, EXCEPT TO THE EXTENT LAWFULLY PERMITTED , DO NOT EXCLUDE, RESTRICT OR MODIFY AND ARE IN ADDITION TO THE MANDATORY STATUTORY RIGHTS APPLICABLE TO THE SALE OF THIS PRODUCT TO YOU.

44 Service approach C7085-90921

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

Onsite service agreements

To provide you with the support level best suited to your system usage and support budget, HP has onsite service agreements with three response times:

Priority Onsite Service is designed for production-critical applications, giving you four-hour service response to your site for calls made during normal HP business hours.

Next Day Onsite Service provides onsite support by the next working day following your service request. Extended coverage hours and extended travel beyond HP designated service zones are available for additional charges on most on-site service agreements.

Weekly (Volume) Onsite Service Agreement, for organizations with many HP LaserJet printers, provides economical, scheduled on-site coverage. Designated for customer sites using 25 or more workstation products, this service provides scheduled weekly repair visits to your central location. HP can write an agreement for any combination of 25 or more workstation products including printers, plotters, computers, and disk drives.

For more information on HP service agreements, call (800) 835-4747 (U.S.) or (800) 268-1221 (Canada).

C7085-90921 Chapter 2 Service approach 45

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46 Service approach C7085-90921

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Installation and configuration

Chapter contents

Unpack the printer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48

Package contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48

Unpacking the printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50

Attaching the power cord . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50

Installing the toner cartridges—for older version HP Color LaserJet 4500 printers . . . . . . . .51

Installing the toner cartridges—for newer version HP Color LaserJet 4500 and HP Color

LaserJet 4550 printers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55

Installing the imaging drum. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57

Using the parallel cable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58

Selecting the display language. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61

Testing the printer operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62

Using PowerSave . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63

Connecting to a network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64

Connecting to a LocalTalk network (J3111A only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64

Connecting to a 10Base2 network (J3111A only). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Connecting to a 10Base-T or 10/100Base-TX network . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66

Enhanced I/O (EIO) configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67

HP JetDirect print servers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67

LocalTalk I/O. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

CPU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68

Printer drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69

Network configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70

Configuring the printer for the network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70

Configuring Novell NetWare frame type parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70

Configuration tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71

NetWare 3.x and 4.x based products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71

Windows 3.1, Windows 95, and Windows NT 3.51 and 4.0 networks . . . . . . . . . . . . . . . . . . 71

IBM OS/2 LAN Server and Warp Server networks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72

LocalTalk network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72

UNIX networks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72

Setting network security on the printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73

Locking the control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74

Using an ASCII PJL escape sequence to set network security . . . . . . . . . . . . . . . . . . . . . . .75

C7085-90921 Chapter 3 Installation and configuration 47

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Unpack the printer

Figure 3-1 Package contents

Package contents

The following items are included with the printer: 1 Printer guides: getting started guide (HP Color LaserJet 4500 and 4550) and quick reference

guide (HP Color LaserJet 4500 only)

2 Software CD-ROMs (including printer drivers and software , network administrator utilities,

online user guide, and the HP JetDirect Print Server Installation Guide)

3 Power cord 4 Control panel overlay (for non-English language users) 5 Parallel cable (only included with the HP Color LaserJet 4500 and 4550 base model printer) 6 Imaging drum 7 Four toner cartridges: cyan (C), magenta (M), yellow (Y), and black (K) 8 Tray 3 (500-sheet paper feeder, included only with the HP Color LaserJet 4500DN, 4550DN

and 4550HDN printers)

9 Duplex unit (included only with the HP Color LaserJet 4500DN, 4550DN and 4550HDN

printers)

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Unpacking the printer

Note

Save all of the packing materials in case you need to repack and transport the printer at a later date.

WARNING!

The base and N model printers weigh approximately 57 kg (125 lb). The DN model weighs 77 kg (169 lb) with Tray 3 and the duplex unit installed. HP recommends having two or more people lift or move any of the printers.

1 Using safe lifting techniques, remove the printer and the printer

accessories from the box.

CAUTION

The prepared location must be level (not more than a 2° angle), able to support up to 77 kg (169 lb), and must support all four corners of the 500-sheet paper feeder (serves as printer base).

2 Place the 500-sheet feeder in the prepared location.

CAUTION

Avoid bending the guide pins while assembling the printer.

3 Using the guide pins for proper alignment, carefully assemble the

printer and accessories.pen the ITB drawer and remove the packing tape, then close the drawer.

4 Open the ITB drawer and remove the packing tape, then close the

drawer.

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Installation

Attaching the power cord

1 Locate the standby button (power switch) on the front of the

printer.

2 The standby button has two positions: in (power on) and out

(standby mode—the fans remain on). Make sure that the standby button is out (standby mode).

3 Locate the power cord on the back side of the printer for the HP

Color LaserJet 4500, 4500N, 4550 and 4550N printers or on the duplex unit for the HP Color LaserJet 4500DN, 4550DN and 4550HDN printers. Connect the power cord to the power receptacle on the back of the printer.

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Installing the toner cartridges—for older version HP Color LaserJet 4500 printers

Note

The following instructions are for older versions of the 4500 series printers (see page 140 to determine which version of the printer you have). See page 55 for instructions for installing toner cartridges in newer version 4500 series and 4550 series printers.

1 Locate the toner cartridges packaged in the printer box. The printer

uses four different toner colors and has a different toner cartridge for each color: K = black, M = magenta, C = cyan, and Y = yellow.

2 Close all the doors and drawers on the printer. If the printer is not

already turned on, turn it on. Wait for the printer to warm up. When it is ready, the control panel displays:

CYAN = MISSING.

Note

If the

INSTALL DRUM message appears, wait for the INSTALL TONER

CARTRIDGE message, then proceed with the following instructions.

TONER POSITION

3 Push the dark gray release button on the side of the printer ([1]) and

open the top cover ([2]).

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4 The cartridge slot for the black toner cartridge is visible. Lift up the

flap that partially covers the cartridge slot. The correct toner color is shown on the flap.

CAUTION

Do not shake the toner cartridges after removing them from the packaging.

5 Remove the cyan toner cartridge from the bag. Gently rotate the

toner cartridge from side to side to redistribute the toner.

6 Remove the inside sealing tape by firmly pulling the orange tab

located on the end of the toner cartridge. (If the tab breaks off, pull on the tape.)

CAUTION

Do not shake the toner cartridge after you have removed the inside tape. Doing so could cause toner to spill.

7 Position the toner cartridge over the cartridge slot so that the blue

arrow on the toner cartridge points to the blue arrow on the printer.

52 Installation and configuration C7085-90921

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8 Make sure that the tab on the other end of the toner cartridge aligns

with the notch on the cartridge slot.

Note

If the tab does not fit in the notch when you insert the toner cartridge, the toner is the wrong color for that cartridge slot.

9 Hold the toner cartridge so that the arrow on the right side of the

cartridge (the control panel side of the printer) points straight down.

10 Slide the toner cartridge down into the slot until the cartridge stops. 11 Rotate the toner cartridge toward the back of the printer (within the

cartridge slot) until the cartridge stops. The cartridge shutter opens to reveal the developer sleeve.

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12 Lower the flap to partially cover the toner cartridge and close the

top cover.

Note

You must close the top cover before installing the next toner cartridge.

13 On the printer control panel, press

[VALUE +] once to prepare the

printer for installation of the next toner cartridge. When the printer is ready, the control panel displays:

TONER POSITION

(color) = MISSING

14 Install the other three toner cartridges by repeating steps 3

through12. Install the cartridges in the following order:

1. black (K)

2. magenta (M)

3. cyan (C)

4. yellow (Y)

15 After installing the fourth toner cartridge, close the top cover and

press

[GO]. Wait while the printer runs an internal color calibration.

The calibration takes a fe w minutes . When the printer is ready, the control panel displays:

CAUTION

If you need to ship the printer, remove the toner cartridges and imaging drum before shipping.

READY.

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Installing the toner cartridges—for newer version HP Color LaserJet 4500 and HP Color LaserJet 4550 printers

Note

The following instructions are for newer versions of the 4500 series and 4550 series printers (see page 140 to determine which version of the

printer you have). See page 51 for instructions for installing toner cartridges in older version printers.

1 Locate the toner cartridges packaged in the printer box. The printer

uses four different toner colors and has a different toner cartridge for each color: C = black; M = magenta; C = cyan; and Y = yellow.

2 If the printer is not already turned on, turn it on and close all doors

and drawers. After the printer warms up for a few minutes, the control panel displays:

TONER POSITION

BLACK = MISSING.

3 Push the dark gray release button on the left side of the printer ([1])

and open the printer’s top cover ([2]).

4 The cartridge slot for the black toner cartridge is visible. Lift up the

flap that partially covers the cartridge slot.

5 Remove the black toner cartridge from the bag and locate the

orange tab on the end of the toner cartridge. Pull the tab firmly to remove the inside sealing tape. (If the tab breaks off, pull on the tape.) Discard the tape.

6 Position the toner cartridge over the cartridge slot so that the blue

arrow on the toner cartridge points to the blue arrow on the printer. The arrow on the right (control panel side of the printer) should point straight down.

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7 Slide the toner cartridge down into the slot until the cartridge

stops.

Note

If the cartridge does not slide easily into the slot, ensure that you have the right color cartridge for that slot.

8 Rotate the toner cartridge toward the back of the printer (within

the cartridge slot) until the cartridge clicks in place.

9 Lower the flap to partially cover the toner cartridge. If the cartridge

was rotated correctly, the flap covers the cartridge label. Close the top cover before installing the next toner cartridge.

10 When the top cover is shut, the carousel advances to the next

toner cartridge slot. When the printer is ready, the control panel displays:

TONER POSITION (COLOR> = MISSING

Install the other three toner cartridges by repeating steps 3 through 9.

11 After installing the fourth toner cartridge, close the top cover and

press

[GO]. Wait while the printer runs an internal color calibration.

The calibration takes a fe w minutes . When the printer is ready, the control panel displays:

READY.

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Installing the imaging drum

CAUTION

Avoid exposing the imaging drum to direct light. Exposure to light for more than 15 seconds can seriously damage the imaging drum.

1 Pull open the drum drawer until it stops.

2 Align the imaging drum over the drawer so that the arrow on top

points to the rear of the printer, and the blue end cap on the side slides into the slot identified with the blue arrow.

3 Slide the imaging drum down into place. 4 Push the front upper drawer shut. Wait while the printer runs an

internal color calibration. The calibration takes a few min utes. When the printer is ready, the control panel displays

CAUTION

If you need to ship the printer, remove the toner cartridges and imaging drum before shipping.

READY.

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Using the parallel cable

The printer can connect to the computer with a bidirectional parallel cable (IEEE-1284C compliant) (see Figure 3-2). Connect the male “C” connector to the printer and the male “B” connector to the computer. HP recommends that the parallel cable length be no longer than 10 meters (30 ft) in length. The cable (HP part number C2946A) is included with the HP Color LaserJet 4500 printer and the 4550 printer. It must be purchased separately for the HP Color LaserJet 4500N, 4500DN, 4550N, 4550DN and 4550HDN printers.

Figure 3-2 Parallel cable with a “C” connector

Parallel interface

When used to describe a parallel interface, the term bidirectional indicates that the printer is able to both receive data from the computer and send data to the computer through the parallel port.

Note To use the enhanced capabilities of the bidirectional parallel interface such as bidirectional

communication between the computer and printer, f aster transfer of data, and automatic configuration of printer drivers, your software application must support these capabilities.

When you are using multiple ports, you can adjust automatic I/O switching to maximize performance by using the timeout feature. If data from other ports appears in the middle of your print job, increase the I/O timeout value.

58 Installation and configuration C7085-90921

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Connecting a parallel cable

1 Press the printer standby button (power switch) to place the printer

in standby mode. Turn off the computer.

2 Plug the parallel cable into the printer’s parallel port until it snaps

into place.

3 Plug the other end of the parallel cable into the computer. Tighten

the screws on the parallel cable to secure the cab le to the computer.

4 Turn the computer on and then turn the printer on.

Note

Your system will sense the printer (if your system is Plug and Play compatible). Follow the directions on your screen. To install the complete software package, cancel Plug and Play, and see the getting started guide for more information.

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Parallel cable pin configuration

To take advantage of the enhanced bidirectional parallel interface, use a 10-meter (30 ft.) parallel cable (IEEE-1284 compliant) with a 25-pin DB male to a (IEEE-1284C) male “C” connector. Use the following table to verify correct pin configuration.

Signal Name Printer Pin #

nSTROBE 15 1 DATA 0 6 2 DATA 1 7 3 DATA 2 8 4 DATA 3 9 5 DATA 4 10 6 DATA 5 11 7 DATA 6 12 8 DATA 7 13 9 nACKNLG 3 10 BUSY 1 11 CALL (PE) 5 12 SELECT 2 13 NAutoFd 17 14 O VDC (GND) 19 – 35 18 – 25 nF AULT 4 15 nSe/In 16 17 nINIT 14 16 PERIPHLH 36 N.C. 18

Computer Port #

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Selecting the display language

To change the display language on the printer control panel, do the following:

1 Press and hold

the standby button (power switch). Continue holding the control panel displays

[SELECT] on the printer control panel while pressing

[SELECT] until

SELECT LANGUAGE (in English), and then release the [SELECT] key.

2 When the control panel displays

[VALUE] repeatedly until your language choice appears.

3 Press

4 After the printer warms up, the control panel displays

Note

If the control panel does not display the message in the language you selected, press the printer standby button and repeat the instructions for changing the display language.

[SELECT] to save your language choice. An asterisk appears

next to the selected language. Then press

selected language. See Table 7-2 on page 217 if an error message appears.

LANGUAGE=ENGLISH *, press

[GO].

READY in the

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Testing the printer operation

Print a configuration page to ensure that the printer is working properly.

1 On the control panel, press

appears on the display.

2 Press

[ITEM] until

[MENU] until INFORMATION MENU

PRINT CONFIGURATION appears.

3 Press 4 After about 30 seconds, the configuration page prints. If it does

[SELECT] to print a configuration page.

not print, see the “Troubleshooting flowchart” on page 213.

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Using PowerSave

PowerSave reduces power consumption when the printer is not in use. The factory default setting for PowerSave is one hour. The instructions below e xplain ho w to change the time setting and how to turn PowerSave

OFF.

ON, and the time setting is

1 On the control panel, press

appears on the control panel display.

2 Press

[ITEM] until

[MENU] until CONFIGURATION MENU

POWERSAVE=1 HR * appears on the HP Color LaserJet 4500, or POWERSAVE=30 MIN * appears on the HP Color LaserJet 4550.

3 Press

4 Press

5 Press

[VALUE +] or [VALUE –] to display other time-setting choices

between 1 minute and 8 hours for the HP Color LaserJet 4500, or turning PowerSave off. Time choices are between 1 minute and 4 hours for the HP Color LaserJet 4550; see the Resets Menu to turn PowerSave off.

[SELECT] to save your choice. An asterisk (*) appears beside

your saved choice.

[GO]. The control panel displays READY.

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Connecting to a network

The following ports are available on the HP JetDirect print servers: 1 LocalTalk DIN-8 port (not available on the HP JetDirect J3113A

print server)

2 BNC port for ThinLAN coaxial cable (not available on the HP

JetDirect J3113A print server

3 RJ-45 port

Network cable connection

Note

On the HP JetDirect J3113A print server, you can attach either a ThinLAN cable or a 10Base-T cable, but not both at the same time.

See the instructions that follow to connect one or more network cables to the printer.

Connecting to a LocalTalk network (J3111A only)

Plug the end of your DIN-8 cable into the LocalTalk port on the HP JetDirect print server. Attach the other end to the network.

Note

Network cables are not included with the printer. They must be purchased separately.

LocalTalk DIN-8 connection

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Connecting to a 10Base2 network (J3111A only)

1 Attach one section of your ThinLAN cable to the BNC “T” connector. 2 Attach another ThinLAN cable section ([1]) or a 50-ohm terminator

([2]) to the other side of the BNC “T” connector. If you are attaching the printer to the end of your network, you must connect a 50-ohm terminator.)

Note

The BNC “T” connector and 50-ohm terminator for the 10Base-2 connection are not included with the printer. They must be purchased separately.

3 Connect the BNC “T” connector to the BNC port on the HP JetDirect

print server.

BNC port

Note

The HP JetDirect J3111A print server supports one Ethernet cable connection at a time.

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HP Color LaserJet 4500 RJ-45 (10BaseT or 10/100Base-TX) connection

Connecting to a 10Base-T or 10/100Base-TX network

Plug the connector of your unshielded twisted-pair cable into the RJ-45 port. The other end of the cable should be attached to the network.

Note

The HP JetDirect print server supports one Ethernet cable connection at a time.

HP Color LaserJet 4550 RJ-45 (10BaseT or 10/100Base-TX) connection

Plug the connector of your unshielded twisted-pair cable into the RJ-45 port. The other end of the cable should be attached to the network.

Note

The HP JetDirect Print server supports RJ-45 connection to 10Base-T or 10/100Base-TX and Fast Infrared (FIR) and parallel ports.

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Enhanced I/O (EIO) configuration

This printer comes equipped with two enhanced input/output (EIO) slots. These slots hold compatible external devices such as the HP JetDirect 600N Print Server. Plugging EIO cards into the slots increases the number of network interfaces available to the printer.

EIO cards can maximize printer performance when you are printing from a network. In addition, they provide the ability to place the printer anywhere on a network. This eliminates the need to attach the printer directly to a server or a workstation and enables you to place the printer closer to your network users.

The printer control panel will have an additional menu (EIO Menu) if the printer is configured with EIO cards. (See the chapter on using the printer control panel in the online user guide.)

Note Installation of cards and network configuration should be performed by a network administrator.

Note The HP Color LaserJet 4550 series printer supports the optional 5 GB hard disk drive (included with

the HP Color LaserJet 4550HDN printer). The HP Color LaserJet 4500 series printer does not support an optional hard disk drive.

HP JetDirect print servers

HP JetDirect print servers (network cards) can be installed in one of the printer EIO slots. These cards support multiple network protocols and operating systems. HP JetDirect print servers facilitate network management by allowing you to connect a printer directly to your network at any location. HP JetDirect print servers also support the Simple Network Management Protocol (SNMP), which provides network managers with remote printer management and troubleshooting through HP Web JetAdmin software.

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LocalTalk I/O

The LocalTalk interface enables you to print directly from a stand-alone Apple Macintosh computer or from a Macintosh computer on a LocalTalk network. For specific information about configuring your computer and printer to print through a LocalTalk interface, refer to the printer’s getting started guide and the HP JetDirect Print Server Software Installation Guide.

CPU

The HP Color LaserJet 4500 formatter PCB incorporates a 133-MHz RISC processor. The HP Color LaserJet 4550 formatter PCB incorporates a 200-MHz RISC processor.

Fast InfraRed Receiver (optional)

The HP Fast Infr aRed Receiver enab les cab leless printing from any IrD A-compliant portable device (such as a laptop computer) to the HP Color LaserJet 4550 printer (when the optional FIR accessory is installed).

The printing connection is maintained by positioning the sending FIR port within operating range. Note that the connection can be blocked by objects such as a hand, paper, direct sunlight, or any bright light shining into either the sending or receiving FIR port.

System requirements

In order to print with the HP Fast InfraRed Receiver, you will need:



the receiver connected to this printer



IrDA-compliant portable or other IR-capable host supporting IRLPT or JetSend Communications Technology over IR



Microsoft Windows 9x, Windows NT 4.0, Windows 2000 or Mac 8.5 with a LaserWriter 8.6 or higher driver

Note Older non-IrDA-compliant portable computers might not be compatible with the HP Fast InfraRed

Receiver . If y ou experience problems when attempting to print with the HP Fast InfraRed Receiver, contact the manufacturer of or dealer f or your portable computer to verify compatibility with the IrD A standard.

For more information, see the HP Fast InfraRed Receiver User Guide that came with the HP Fast InfraRed Receiver.

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Printer drivers

The optimal way to control the printer is through settings in a software application or through the printer driver. Changing print settings via a software application affects only that particular print job. Most software applications allow you to choose print settings from menus within the application. Software application settings and printer driver settings override the settings on the printer control panel.

For best print quality, always select the paper or media type in the printer driver. Different media types use different printer settings. For example, selecting transparencies in the driver causes the printer to use a different color table, one designed for maximum print quality on transparencies. Additionally, transparencies cause the printer to adjust printer speed and fuser temperature.

Other media types affect the printer settings as well: Selecting heavy or glossy media, for example, causes the printer to change the engine speed.

The printer driver also gives you customized control of color te xt, gr aphics, and photos . The f ollo wing color control features are available only through your HP printer driver:



Halftone Options



HP ColorSmart II

Halftone options affect the resolution and clarity of your color output. You can select halftone settings for text, graphics, and photos independently. The two halftone options are Smooth and Details.

HP ColorSmart II default settings will produce optimum results for most color printing needs. However, you can also manually adjust color settings through the printer driver’s Vivid Color and Screen Match color control options.

See the printer driver’s online Help for details on color settings and their effect on printed output.

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Network configuration

Configuring the printer for the network

You can configure certain network parameters on the printer from the printer control panel or, for most networks, from the HP JetAdmin Software (or the HP LaserJet Utility for Macintosh). The utilities are provided on the printing software CD-ROM that comes with the printer . You can also set these parameters from the HP Web JetAdmin Softw are, which is a v ailab le at http://www.hp.com/go/ webjetadmin.

For a complete list of supported networks and for instructions on configuring network parameters from software such as HP JetAdmin and HP Web JetAdmin, see the HP JetDirect Print Server Software Installation Guide. The guide comes on the CD-ROM with printers in which an HP JetDirect 600N print server is installed.

Note If you are configuring network parameters from the printer control panel, the control panel menu

appears in the languages listed below . If your language is not listed, the menu will appear in English and you will need to configure the printer by using HP JetAdmin software (or the HP LaserJet Utility for Macintosh).

DanishFrenchPortuguese DutchGermanSpanish EnglishItalianSwedish FinnishNorwegian

Configuring Novell NetWare frame type parameters

The HP JetDirect 600N print server automatically selects a NetWare frame type. Select a frame type manually only when the print server selects an incorrect frame type. To identify the frame type chosen by the HP JetDirect 600N print server, print a configuration page.

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Configuration tips

HP JetDirect 600N print servers (network cards) provide software solutions for:



Novell NetWare versions 3.x and 4.x



Microsoft Windows 3.1 and Windows 95



Microsoft Windows NT 3.51 and 4.0



IBM OS/2 LAN Server or Warp Server



LocalTalk



UNIX (HP-UX, Solaris, and SunOS)

For information about installing HP JetDirect 600N print servers and the types of interfaces and network operating systems supported, see the HP JetDirect Print Server Software Installation Guide.

NetWare 3.x and 4.x based products

When using Novell NetWare 3.x and 4.x products with the HP JetDirect print server, queue server mode provides improved printing performance over remote printer mode. For more information, see the HP JetDirect Print Server Software Installation Guide.

Windows 3.1, Windows 95, and Windows NT 3.51 and 4.0 networks

For Windows 3.1 and Windows 95 netw orks, HP JetAdmin software w orks as a Windows application and supports native Novell Directory Services (NDS).

For peer-to-peer Windows 95 networks, HP JetAdmin softw are works as a Windows application, and connects HP printers to an IPX/SPX-compatible printer network using an HP JetDirect print server.

For Windows NT 3.51 and 4.0 networks, HP JetAdmin software supports the TCP/IP or IPX/SPX environments.

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IBM OS/2 LAN Server and Warp Server networks

For IBM OS/2 LAN Server and Warp Server Networks, HP JetAdmin software supports the Data Link Control (DLC) environment. Depending on the number of network printers and type of printer driver, when using virtual memory, improved performance might be realized by increasing server RAM, especially if the swapper.dat file is large.

LocalTalk network

Macintosh DIN-8 cable

To connect a Macintosh computer directly to this printer, use a standard Macintosh DIN-8 printer cable. This cable cannot be used in a network configuration.

Note For LocalTalk configuration, the DIN-8 printer cable must be plugged into the printer port of your

Macintosh computer.

LocalTalk configuration

To connect the printer to a Macintosh computer on a LocalTalk network, use the HP LocalTalk Cable Kit. You will need a kit for each printer and an additional kit for each Macintosh computer on your network.

UNIX networks

HP JetAdmin software provides a TCP/IP-based solution for configuring and managing HP JetDirect print servers on HP-UX, Solaris, and SunOS systems.

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Setting network security on the printer

This printer features control panel locking, which allows network administrators to pre v ent users from changing certain printer control panel settings. When a menu is locked, unauthorized users trying to change settings in the printer control panel will receive the following message:

ACCESS DENIED MENUS LOCKED

You can use HP JetAdmin software, the HP LaserJet Utility for Macintosh, or an ASCII escape sequence to perform this procedure. For instructions on locking the printer control panel using either the HP JetAdmin software or the HP LaserJet Utility for Macintosh, see the online Help for these utilities.

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Locking the control panel

You can prevent users f rom changing printer control panel settings by estab lishing a password and locking the printer control panel. The control panel offers multiple levels of security. You can lock certain control panel menus, allowing users to change the rest of the menus, or you can lock all of the menus—and you can even lock the unauthorized users who try to change settings at the control panel receive the following message:

ACCESS DENIED MENUS LOCKED

Levels of security

Table 3-1 Printer security levels

Lock setting Control panel items locked

0 = None No items are locked

[CANCEL JOB] key. When the printer control panel is locked,

1 = Minimum Configuration Menu

I/O Menu

2 = Moderate Configuration Menu

I/O Menu Calibration Menu

3 = Maximum Configuration Menu

I/O Menu Calibration Menu Resets Menu

Calibration Menu Resets Menu

Resets Menu Paper Handling Menu

Paper Handling Menu Information Menu Printing Menu

ANCEL JOB] key

Use HP JetAdmin software, HP LaserJet Utility for Macintosh, or an ASCII escape sequence to perform this procedure. HP software, which comes on the software CD-ROM, is easier to use than an ASCII escape sequence. For instructions about locking the control panel by using either HP JetAdmin software or the HP LaserJet Utility for Macintosh, go to the online Help for that software.

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Using an ASCII PJL escape sequence to set network security

If you decide to use the ASCII escape sequence, you m ust use an MS-DOS® or Windows ASCII editor to create the commands. The commands must also be sent to the printer by using a DOS COPY command or an ASCII file download utility. The PJL T echnical Ref erence Man ual is located on CD-ROM, part number 5961-0976. Order a copy of this manual from the HP website: http://www.hp.com

Note In the following e xamples, EC represents the escape character . For more inf ormation on using escape

characters, see the PJL Technical Reference Manual.



To lock or unlock the printer control panel if a password has not been set, send the following ASCII sequence to the printer:

EC%-12345X@PJL JOB @PJL DEFAULT CPLOCK=NONE

(or MINIMUM, MODERATE, or MAXIMUM) @PJL EOJ EC%-12345X



To set the password, send the following ASCII sequence to the printer:

EC%-12345X@PJL JOB @PJL DEFAULT PASSWORD=[numeric password (0 to 65535)] @PJL EOJ EC%-12345X



To lock or unlock the control panel if the password has been set, send the following ASCII sequence to the printer:

EC%-12345X@PJL JOB PASSWORD=(numeric password) @PJL DEFAULT CPLOCK=NONE

(or MINIMUM, MODERATE, or MAXIMUM) @PJL EOJ EC%-12345X

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4 Printer maintenance

Chapter contents

Cleaning the printer and accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78

Cleaning spilled toner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78

Approximate replacement intervals for consumable items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80

Imaging drum life . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80

Replacement intervals for consumables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Locating consumables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .84

Replacing consumable items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .85

Cleaning the toner density sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .85

Replacing the toner cartridges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .86

Replacing the imaging drum. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88

Replacing the transfer kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .89

Replacing the fuser kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92

Replacing the paper rollers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .94

DIMM configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .98

Adding memory. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

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Cleaning the printer and accessories

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



every time you change the toner cartridge (run a few pages through)



after printing approximately 5,000 pages for C (cyan), M (magenta), and Y (yellow); and 8,000 pages for K (black)



whenever print quality problems occur

Clean the outside surfaces with a water-dampened cloth. Observe the warning and caution below.

WARNING! Before you begin these steps , turn the printer off and unplug all power cords to av oid shoc k hazard.

Be careful when cleaning around the fusing assembly area. It might be hot.

CAUTION T o av oid permanent damage to the toner cartridge, do not use ammonia-based cleaners on or around

the printer. Do not touch the transfer 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.

Table 4-1 Cleaning the printer

Component Cleaning Method

Outside covers Use an HP Toner Cleaning Cloth (part number

5090-3379) or 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 the

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

Use a water-dampened, lint-free cloth.

transfer roller with your fingers .

Cleaning spilled toner

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

CAUTION When cleaning the printer, do not touch the transfer roller with the damp cloth or with your fingers.

Vacuum specifications

Do not vacuum the printer or any spilled toner using a conv entional vacuum. Toner particles used in this product might be too fine for effective vacuuming and could result in damage to conventional vacuums.

A vacuum specifically designed for cleaning toner can be used if it is capable of filtering fine particles (5 microns in diameter).

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Toner catch tray and transport assembly

Thoroughly clean the toner catch tray, and clean or replace the paper transport assembly. These assemblies are easily accessed once the fusing assembly has been removed (see “Toner catch tray and paper transport assembly” on page 204).

To remove the toner catch tray, pull downward on the tab and slide the tray out of the rear of the printer. To remove the transport assembly, remove the one screw (shown in Figure 6-69 on page

204) and then slide the assembly to the left. Once the assembly is free of the spline gear drive, you can easily maneuver the assembly out of the rear of the printer. Thoroughly vacuum the assembly and the cavity where the transport assembly rests.

When re-installing the transport assembly, there are two tabs on the right side of the assembly that must be aligned to the printer’s frame; the white drive gear splines on the assembly must be aligned with the driving gear mechanism on the printer.

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Approximate replacement intervals for consumable items

Imaging drum life

Images versus pages

The life of the imaging drum (about 25,000 pages) is stated in terms of A-4/Letter-size images. The number of images printed for each sheet of paper varies, depending on the mix of color, type of format, and whether duplexing has occurred. The fo llo wing guidelines will help determine drum life:



An “image” is a layer of toner. An A-4/Letter-size color page printed on one side contains four A-4/Letter images, one for each color (CMYK).



A duplexed sheet counts as tw o pages. In color duple x mode (printing on both sides of a page), there are eight A-4/Letter-size images per A-4/Letter sheet.



The page count numbers on the Configuration Page give a count of the number of pages printed, regardless of size. For e xample, an A-4-siz e color duplex ed page takes eight images to print, but only adds two pages to the page count.

Usage patterns

How the printer is actually used can also have a significant effect on drum life:



Because of pre- and post-rotations, the drum wear is approximately the same for a one-page job as for a two-page job. Frequent short jobs will decrease the drum life.



There are extra rotations and cleaning cycles when printing duplex pages . Duplex jobs use the imaging drum at a higher rate than comparable simplex jobs.

“Drum life low” versus “drum life out”

The DRUM LIFE LOW wa rning message on the control panel indicates approximately 20 percent of life remaining. This is intentional to allow the user enough time to order a replacement kit (C4195A). It is perfectly acceptable to continue to print while the displayed. Ho we v er, when the its life and the printer will not operate.

DRUM LIFE OUT message occurs, the drum has reached the end of

DRUM LIFE LOW message is

Key points to remember



The drum life specification assumes two-page jobs, one-sided printing on A-4/Letter-size pages. When printing in color (four images per page), the number of pages will be 1/4 of the images printed.



Due to the carousel arrangement of the color cartridges, color printing uses four images per page even if only one color is actually used.

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Drum life under different circumstances

The following graph shows the approximate life of the imaging drum for different types and sizes of print jobs.

40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10

Pages/Drum (K)

8 6 4 2 0

1 2 5 10 15 20 2000

Pages/job A-4 simplex monochrome A-4 duplex monochrome

A-4 simplex color A4 duplex color

Figure 4-1 Imaging drum life

Note When printing black pages, there is a wider range of v ariation in pages/drum. The drum life will be well

below 25,000 images if only short monochrome jobs are printed.

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The following graph shows the drum life for printing in Letter and Legal formats:

45000

40000

35000

30000

25000

20000

15000

Engine, total page count

10000

5000

04812162024

Pages/job

Figure 4-2 OPC life

4-color simplex Letter 4-color duplex Letter

Monocolor simplex Letter Monocolor duplex Letter 4-color simplex Legal

4-color duplex Legal Monocolor simplex Legal

Monocolor duplex legal

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Replacement intervals for consumables

You can identify consumable items by their labeling and their blue plastic handles . F or instructions on installing consumables, see the installation guides supplied with each consumable item.

The following table lists the replacement intervals and part numbers for printer consumable items, and the control panel messages that prompt you when it is time to replace each item.

Table 4-2 Approximate replacement interval for consumable items

Consumable Printer message Page count Approximate

time period

Black (K) toner cartridge

Cyan (C) toner cartridge

Magenta (M) toner cartridge

Y ello w (Y) toner cartridge

Drum kit

Transfer kit

Fuser kit

Approximate lives are based on 2,000 pages per month.

The approximate average A4/Letter-size page count is based on 5% coverage of individual toner colors. Page counts are only estimations; usage conditions and print patterns cause results to vary.

TONER K LOW or TONER K OUT

TONER C LOW or TONER C OUT

TONER M LOW or TONER M OUT

TONER Y LOW or TONER Y OUT

DRUM KIT OUT REPLACE DRUM KIT

WASTE TONER FULL REPLACE KIT

TRANSFER KIT OUT REPLACE KIT

FUSER KIT OUT REPLACE KIT

9,000 pages

6,000 pages 23 months R94-4004-410CN

6,000 pages 23 months R94-4003-410CN

6,000 pages

25,000 blackand-whiteonly pages, or 6,250 color pages.

100,000 black-andwhite-only pages, or 25,000 color pages.

100,000 black-andwhite-only pages, or 50,000 color pages.

4.5 months R94-4005-410CN

3 months R94-4002-410CN

12.5 months for black-and-whiteonly pages, or 3 months for color pages.

50 months for black-and-whiteonly pages, or

12.5 months for color pages.

50 months for black-and-whiteonly pages, or 25 months for color pages.

Part number

(see Table 8-1)

(see Table 8-1) R94-4001-410CN

(see Table 8-1)

R96-5009-000CN (see Table 8-1)

R96-5007-000CN (110V) R96-5008-000CN (220V) (see Table 8-1)

CAUTION Hewlett-Packard recommends the use of HP products in this printer. Use of non-HP products can

cause problems the require service not covered by the Hewlett-Packard warranty or service agreements.

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Locating consumables

Figure 4-3 illustrates the location of each consumable item.

Figure 4-3 Location of consumables

1 Toner cartridges 2 Imaging drum cartridge 3 Intermediate transfer belt 4 Transfer roller 5 Air filters 6 Fuser 7 Paper feed and separation rollers

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Replacing consumable items

Cleaning the toner density sensor

Clean the toner density sensor whenever the imaging drum is replaced or when the control panel message displays:

RANGE

CAUTION

To avoid scratching the sensor, do not clean it with any paper products.

To clean the toner density sensor

1 Open the ITB drawer and remove the cleaning brush mounted

inside.

2 Open the drum drawer and remov e the imaging drum using the blue

handle.

3 Using the cleaning brush, remove all dust and toner particles from

the sensor as illustrated.

4 Replace the imaging drum.

DENSITY SENSOR OUT OF

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Replacing the toner cartridges

Replace the toner cartridge when the control panel displays:

TONER CMYK OUT.

The display can indicate that one or more toner colors are out. 1 With the printer turned on and warmed up, push the dark gray

release button on the side of the printer ([1]) and open the printer’s top cover ([2]).

Note

If you need to replace a toner cartridge and the

TONER CMYK LOW or

TONER CMYK OUT messages are not displayed on the control panel,

open and close the top cover . W ait for the

message to appear on the control panel. Press [SELECT] and the

TONER

message

[–VALUE+] to select the toner cartridge you want to replace, and

proceed to the following steps.

2 Lift the toner access cover and remove the used toner cartridge.

CAUTION

Do not shake the toner cartridges after removing them.

3 Position the toner cartridge over the cartridge slot so that the blue

TONER=(COLOR) appears on the printer control panel. Press

arrow on the toner cartridge points to the blue arrow on the printer. The arrow on the right (control panel side of the printer) should point straight down.

PRESS SELECT TO CHANGE

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4 Make sure that the tab on the other end of the toner cartridge aligns

with the notch on the cartridge slot.

Note

If the tab does not fit in the notch when you insert the toner cartridge, the toner is the wrong color for that cartridge slot.

5 Slide the toner cartridge down into the slot until the cartridge stops.

6 Rotate the toner cartridge toward the back of the printer (within the

cartridge slot) until the cartridge stops. The cartridge shutter opens to reveal the developer sleeve.

7 Lower the toner access cover and close the printer’s top cover.

Note

You must close the top cover before installing another toner cartridge.

CAUTION

If you need to ship the printer, remove the toner cartridges and imaging drum before shipping.

Note

If you receive a 54.2 error, see page 233 for more information.

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Replacing the imaging drum

Replace the imaging drum when the printer control panel displays:

REPLACE DRUM KIT.

1 Open the drum drawer and remove the used imaging drum. 2 Locate the new imaging drum. Align it over the drawer so that the

arrow on top points to the rear of the printer, and the b lue end cap on the side fits into the slot identified with the blue arrow.

CAUTION

Avoid exposing the imaging drum to direct light. Exposure to light for more than 15 seconds can seriously damage the imaging drum.

3 Slide the imaging drum down into place and close the drawer.

CAUTION

If you need to ship the printer, remove the toner cartridges and imaging drum before shipping.

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Replacing the transfer kit

Replace the transfer kit when the printer control panel displays:

TRANSFER KIT OUT REPLACE KIT.

The transfer kit consists of an intermediate transfer belt (ITB), a transfer roller, two air filters, and a hand wipe.

1 Open the ITB drawer. Remove the used transfer belt by pulling up

on the green handles located on the sides.

2 Locate the transfer roller inside the printer. 3 To unlock the used transfer roller, gently push back and up (in a

rotating motion) on the blue triangles located on the lower corners of the flap that is in front of the roller.

4 Remove the used transfer roller by lifting it up and then out.

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CAUTION

Avoid touching the foam portion of the roller. Oil from your fingers can affect the print quality.

5 Locate the new transfer roller and place it in the notches behind

the roller flap.

CAUTION

Be careful not to insert the transfer roller backwards. Doing so can damage the printer.

6 Snap the new transfer roller into place b y pushing both ends of the

roller toward the rear of the printer .

7 Remove the new transfer belt from the bag. Align the blue pins

that are on both sides of the new transfer belt with the b lue slots in the drawer. Then slide the transfer belt down into place. Close the ITB drawer.

8 To reset the printer for the new transfer kit, push

control panel until

RESETS MENU appears in the control panel

[MENU] on the

display.

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9 Press [ITEM] until TRANSFER KIT SELECT IF DONE appears in the

control panel display. Then press

[SELECT].

10 To replace the air filters, turn the printer off and wait 10 minutes for

the fans to stop running. Unplug the power cord and open the upper rear door of the printer. If the printer has a duplex unit, open the rear cover of the duplex unit.

11 Remove the two used air filters from the rear of the printer. Then

use the hand wipe to clean excess dust away from the fan areas.

12 Insert the new air filters. Close all doors, plug in the printer , and turn

the printer on.

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Replacing the fuser kit

Replace the fuser kit when the printer control panel displays:

FUSER LIFE OUT REPLACE KIT.

The fuser kit contains one fuser, four paper rollers, and a hand wipe.

WARNING!

To prevent possible burns, be sure the power cord is unplugged and

that the printer has cooled for 30 minutes.

1 Open the upper-rear door of the duplex unit, if attached. 2 Open the upper-rear door of the printer. 3 Release the straps from the rear door by squeezing the latches on

the straps where the latches connect to the rear door.

4 Inside the back of the printer, near the bottom, locate the tw o b lue

latches on the fuser.

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5 Rotate the two blue latches upward 90 degrees. 6 Grasp the finger holds on the fuser and pull the used fuser out of the

printer.

7 Remove the new fuser from the bag using the finger holds. Holding

the new fuser by the finger holds, slide the fuser into the printer.

CAUTION

The blue latches will lock only if the fuser is installed.

8 Lock the fuser in place by rotating the two blue latches down.

Reconnect the support straps to the upper rear door.

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Replacing the paper rollers

1 Remove Tray 2 from the front of the printer. 2 On Tray 2, locate the paper roller and the cover next to the roller. 3 Squeeze the cover release lever and open the cover. 4 Remove the old paper roller from Tra y 2 by squeezing together the

blue tabs and then sliding the roller off its spindle.

Note

The feed roller has a D-shaped hub and the separation roller has a round-shaped hub.

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spindle until the roller clicks into place.

6 Close the cover. 7 Inside the tray cavity on the printer, locate the paper roller in the top

of the tray cavity.

8 Squeeze the blue tabs on the roller and remove the old paper roller

from the tray cavity.

5 Install a new paper roller on Tray 2. Slide the new roller onto the

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9 Install a new paper roller on the tray cavity. Slide the new roller

onto the spindle until the roller clicks into place.

10 Replace Tray 2. 11 If you have the optional 500-sheet paper feeder (Tray 3), repeat

steps 3 through 9 to replace the two paper rollers for Tray 3.

12 Remov e the paper roller in the tra y ca vity f or Tray 3 in the opposite

direction from the paper roller in the other tray cavity.

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13 Turn the printer on. When the printer control panel displays READY,

reset the printer for the new fuser kit and push panel until

RESET MENU appears.

[MENU] on the control

14 Press

Then press

15 Press

[ITEM] until NEW FUSER KIT, SELECT IF DONE appears.

[SELECT].

[GO] to return the printer to READY.

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DIMM configuration

You can add additional Random Access Memory (RAM) to this printer by installing Dual Inline Memory Modules (DIMMs). The HP Color LaserJet 4500 printer uses 100-pin, non-parity, synchronous DRAM memory modules. The HP Color LaserJet 4550 printer uses 168-pin synchronous DRAM memory modules. The SDRAM modules do not need to be configured in pairs (in corresponding left and right slots).

Note Extended Data Output (EDO) DIMMs are not supported.

Adding memory

HP Color LaserJet 4500 printer

You can install 4, 8, 16, 32, or 64 MB DIMMs into the printer’s three DIMM slots. The DIMM slots can be used to add memory, fonts, or firmware upgrades.

HP Color LaserJet 4550 printer

You can install 64 or 128 MB DIMMs into the printer’s two DIMM slots. The DIMM slots may be used to add memory only. You can add fonts or firmware upgrades to the printer’s two 100-pin slots.

Note The HP Color LaserJet 4500 printer will recognize RAM only up to 208 MB. The HP Color LaserJet

4550 printer will recognize RAM only up to 192 MB. Additional memory will not be used by either printer.

To install memory in the printer, you must remove the formatter board from the rear of the printer. To remove the formatter board, remove the six screws shown in Figure 4-4. The DIMMs are then inserted into the available slots in the formatter board. See Appendix A in the online user guide for installation instructions.

Figure 4-4 Removing the formatter board

CAUTION Do not attempt to remove the DIMM in slot #4 (see Figure 4-5) of the HP Color LaserJet 4500 printer,

or the DIMM in slot #3 (see Figure 4-6) of the HP Color LaserJet 4550 printer. This DIMM is part of the printer’s firmware. Removing it will affect printer operation.

98 Printer maintenance C7085-90921

HP LaserJet 4550, LaserJet 4500 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Contents

List of Figures

List of Tables

1 Printer description

Identification

Model and serial numbers

Power and regulatory information

Electrical specifications

Printer specifications

Printer assemblies

Media requirements

Selecting print media

Media specifications

Non-supported media

Printing on special media

Environmental Product Stewardship Program

Regulatory statements

HP Color LaserJet 4500

HP Color LaserJet 4550

Safety information

Laser safety statement

Toner safety

Laser statement for Finland

2 Service approach

Service approach

Parts and supplies

Ordering parts

Ordering consumables

Exchange program

Consumables

World Wide Web

HP Service Parts Information Compact Disc

HP Support Assistant Compact Disc

Ordering related documentation and software

Warranty statement

Hewlett-Packard warranty statement

Onsite service agreements

Installation and configuration

Unpack the printer

Package contents

Installation

HP JetDirect print servers

LocalTalk I/O

System requirements

Printer drivers

Network configuration

Configuring the printer for the network

Configuring Novell NetWare frame type parameters

Configuration tips

NetWare 3.x and 4.x based products

LocalTalk network

UNIX networks

Setting network security on the printer

Locking the control panel

4 Printer maintenance

Cleaning spilled toner

Approximate replacement intervals for consumable items

Imaging drum life

Replacement intervals for consumables

Locating consumables

Replacing consumable items

DIMM configuration

Adding memory