HP LaserJet 9000 Service Manual

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hp LaserJet 9000

9000n•9000dn•9000hns

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HP LaserJet 9000 Series printer

Service_____________________

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adaptation, or translation without prior written permission is prohibited, except as allowed under the copyright laws.

Part number: C8519-90912 First Edition, May 2001

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

NERGY STAR

mark of the United States Environmental Protection Agency.

is a U.S. registered service

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

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List of tables List of figures 1 Product information

Product features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Product specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Product overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

External assembly locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Interface connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

Optional accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Regulatory information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Regulatory requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

FCC regulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Declaration of conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Environmental product stewardship program . . . . . . . . . . . . . . . . . . . . . . . . 23

Service approach . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

Parts and supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Limited warranty for print cartridge life . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

Service and support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Worldwide service and support offices . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

2 Product requirements

Site requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Operating environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Space requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

Media specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

Guidelines for selecting paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Special media specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

Storing print media . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

Testing media specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

Tools and suppliers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Media input/output options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Trays, bins, and paper handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Media sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

3 Product configuration

Using the control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Control panel keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Numeric keypad commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Settings and defaults. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Setting the display language. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48

Setting tray registration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Printer driver information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Factory default settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51

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Control panel menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Using a menu map. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Menu map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Retrieve job menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Information menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Paper handling menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Configure device menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Network and mass storage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Remote firmware upgrade (RFU) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Downloading the new firmware to the printer. . . . . . . . . . . . . . . . . . . . . . . . 64

Using HP Web JetAdmin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

4 Product maintenance

Preventative maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Preventive maintenance kit contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Cleaning the printer and accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

General cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Internal cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

Fuser cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

Print cartridge information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Storage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Handling instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Refilled print cartridges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Print cartridge weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Print cartridge life expectancy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Saving toner with EconoMode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

5 Theory of operation

Basic operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

Sequence of operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Power-on sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Timing chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Engine control system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

DC controller PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

DC controller operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

High-voltage power supply circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

Low-voltage power supply unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

Formatter system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

Formatter hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

Formatter subsystem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

Laser/scanner system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

Image formation system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

The eight processes of image formation . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

Print cartridge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

Pickup and feed system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

Media-size detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

Media-level detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

Multifeed prevention. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

Overhead transparency detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

Fuser wrapping jam detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

Jam detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

Optional tray 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

Tray 1 driver PCB. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

Sequence of operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

Pickup and feed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

Jam detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

iv Table of contents C8519-90912

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Optional tray 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .104

Tray 4 driver PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

Sequence of operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .104

Pickup and feed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

Media level and size detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .105

Jam detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

Optional 3000-sheet stapler/stacker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .106

Controller PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .106

Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

Power-on sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

Main modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

Paper path and jam detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

Stapler bin full condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .109

Optional 3000-sheet stacker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .110

Controller PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .110

Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

Power-on sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

Main modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

Paper path and jam detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

Stacker bin full condition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

6 Removal and replacement

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .117

Removal and replacement strategy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .117

Repair notices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .117

Electrostatic discharge (ESD). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

Required tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .117

Orientation of the printer (with tray 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .118

Covers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .119

Right top cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .119

Left top cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

Front cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .121

Right door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122

Right lower cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

Left door and diverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .124

Left back cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

Back cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126

Rail covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127

Top assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128

Control panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128

Laser/scanner assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129

Delivery assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .130

Delivery fan assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .131

Delivery assembly fans and face-down bin fan (fans #3, #6, and #4) . . . .132

Delivery motor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .133

Cartridge release lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134

Front assemblies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .135

Print cartridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135

Transfer roller assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136

Tray 2 or tray 3 (interchangeable). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136

Rollers (pickup, feed, or separation). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137

Fuser jam removal knob . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138

Registration jam removal knob . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139

Right assemblies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .140

Tray 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .140

Paper input unit (PIU) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141

Registration assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144

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Transfer guide assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145

Left assemblies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146

Duplexer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146

Fuser assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147

Back assemblies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148

Formatter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148

Low-voltage power supply (LVPS). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149

High-voltage power supply (HVPS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150

DC controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151

Toner-sensor contact assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152

Cartridge memory PCA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153

Drum motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154

Feed-drive assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155

Power supply fan (fan #1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156

Cartridge fan (fan #5). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157

Controller fan (fan #2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158

2000-sheet feeder (tray 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159

Orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159

Left side cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159

Right side cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160

Back covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161

Tray 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162

Rollers (pickup, feed, and separation) . . . . . . . . . . . . . . . . . . . . . . . . . . . 163

Registration assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164

Drive motor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165

Drive assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165

Controller board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166

Paper-size detection switch PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167

Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168

Pickup assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169

Paper connecting unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170

3000-sheet stapler/stacker and 3000-sheet stacker. . . . . . . . . . . . . . . . . . . . . 171

Output accessory removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171

Parts removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171

Orientation of the stapler/stacker. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172

Face-up bin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173

Stapler/stacker bin (stapler/stacker only) or stacker bin (stacker only) . . . 173

Back inner cover and front inner cover . . . . . . . . . . . . . . . . . . . . . . . . . . . 174

Front cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175

Back cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176

Foot cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177

Door assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177

Controller PCA cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178

Flipper assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179

Paper path assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180

Accumulator wings (stapler/stacker only) . . . . . . . . . . . . . . . . . . . . . . . . . 181

Paper stopper clips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182

Accumulator assembly (stapler/stacker only). . . . . . . . . . . . . . . . . . . . . . . 183

Carriage assembly (stapler/stacker only) . . . . . . . . . . . . . . . . . . . . . . . . 185

Offset module (stacker only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186

Stapler (stapler/stacker only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187

Controller PCA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188

Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189

LED PCA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190

Interlock switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191

Safety switch assembly (stapler/stacker only) . . . . . . . . . . . . . . . . . . . . . . 192

Optical sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193

Cable assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194

Casters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195

vi Table of contents C8519-90912

Page 9

7 Troubleshooting

Troubleshooting process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199

Basic troubleshooting process flow. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200

Preliminary operating checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 202

General troubleshooting information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203

Miscellaneous problems and solutions. . . . . . . . . . . . . . . . . . . . . . . . . . . .203

Power-on. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .206

Troubleshooting with control panel messages . . . . . . . . . . . . . . . . . . . . . . . . . 207

Control panel display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207

Event log page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207

Control panel messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .210

Control panel and event log message format. . . . . . . . . . . . . . . . . . . . . . .211

Printer message tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211

Alphabetic error messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211

Numeric error messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221

User/service level diagnostics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .238

Paper path test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 238

Service test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 238

Engine test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .240

Setting the display language. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .241

Re-initializing a hard disk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 241

Service level diagnostics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .242

Service menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .242

Service mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .242

Accessories diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .246

2000-sheet feeder diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .246

3000-sheet stapler/stacker and stacker diagnostics . . . . . . . . . . . . . . . . .249

Jam troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .254

Jams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .255

Customer print job. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 255

Clearing jams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .255

Evaluate the information pages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 256

Configuration page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .256

Jetdirect page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 259

Supplies status page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .260

Usage page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .261

File directory page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 262

Image-formation troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 263

Check the print cartridge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .264

Image defect tables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 265

Repeating defect ruler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .273

Media troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .274

Determine the problem source: print media or printer . . . . . . . . . . . . . . . . 274

Isolate a paper path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 274

Isolate a media brand . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 275

Isolate a media type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .275

Communication troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .276

Communications check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .276

Jetdirect configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .276

Verify network and server operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .276

Wiring diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .277

C8519-90912 vii

Page 10

8 Parts and diagrams

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 280

Ordering parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 280

Consumables, supplies, accessories, FRUs, and documentation. . . . . . . 281

Common hardware. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 283

Illustrations and parts lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 284

External covers and panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 284

Left door and diverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 286

Right cover assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 288

Internal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 290

Internal components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 290

Drum feed drive assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 298

Fuser delivery drive assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 299

Cartridge lifter assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300

500-sheet trays (tray 2 and 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 301

Paper input unit (PIU). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 302

Registration assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 303

Transfer roller assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 304

Delivery assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 306

PCB assembly location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 308

2000-sheet feeder (optional tray 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 310

2000-sheet feeder (optional tray 4) main body . . . . . . . . . . . . . . . . . . . . . 310

2000-sheet feeder (optional tray 4) drive assembly. . . . . . . . . . . . . . . . . . 314

2000-sheet feeder (optional tray 4) PCB location . . . . . . . . . . . . . . . . . . . 315

Optional tray 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 316

Optional tray 1 assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 316

Paper handling output device. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 318

3000-sheet stapler/stacker. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 318

3000-sheet stacker. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 322

Alphabetical parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 326

Numerical parts list. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 334

Index

viii Table of contents C8519-90912

Page 11

List of tables

Table 1. Features of the HP LaserJet 9000 Series printers . . . . . . . . . . . . . . . .16

Table 2. Configuration comparison . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Table 3. Physical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Table 4. Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Table 5. Environmental specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Table 6. Noise-level specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Table 7. Determining basis weight of paper . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

Table 8. Paper weight equivalence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Table 9. Tools and suppliers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

Table 10. Optional tray 1 media sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

Table 11. Tray 2 and tray 3 media sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Table 12. Optional tray 4 paper sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Table 13. Duplexer paper sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Table 14. 3000-sheet stapler/stacker and 3000-sheet stacker media sizes . . . 44

Table 15. Control panel key functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46

Table 16. Printer state and numeric key effect . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Table 17. Factory default settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Table 18. Retrieve job menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Table 19. Information menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Table 20. Paper handling menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Table 21. Configure device menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61

Table 22. Storing print cartridges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Table 23. Normal sequence of operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Table 24. Failure sequence of operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Table 25. Pickup and feed system sensors and switches . . . . . . . . . . . . . . . . .99

Table 26. Pickup and feed system motors and solenoids . . . . . . . . . . . . . . . .101

Table 27. Primary steps for troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . 199

Table 28. Power-on defects or blank display . . . . . . . . . . . . . . . . . . . . . . . . . . 206

Table 29. Alphabetic error messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .211

Table 30. Numeric error messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .221

Table 31. Service test abnormality codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . 238

Table 32. Service menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .242

Table 33. DIP switch settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .247

Table 34. 2000-sheet feeder light pattern interpretation . . . . . . . . . . . . . . . . .248

Table 35. Stapler/stacker and stacker user light pattern interpretation . . . . . .252

Table 36. General jam troubleshooting questions . . . . . . . . . . . . . . . . . . . . . . 254

Table 37. Printer devices troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . .258

Table 38. Image quality checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 263

Table 39. Image defects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 266

Table 40. Consumables, supplies, accessories, FRUs, and documentation . 281

Table 41. Hardware table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .283

Table 42. Common torque values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 283

Table 43. Printer external covers and panels . . . . . . . . . . . . . . . . . . . . . . . . .285

Table 44. Left door and diverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 287

Table 45. Right cover assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .289

Table 46. Internal components (1 of 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .291

Table 47. Internal components (2 of 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .293

Table 48. Internal components (3 of 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .295

Table 49. Internal components (4 of 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .297

C8519-90912 ix

Page 12

Table 50. Drum feed drive assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 298

Table 51. Fuser delivery drive assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 299

Table 52. Cartridge lifter assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300

Table 53. 500-sheet trays (tray 2 and 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 301

Table 54. PIU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 302

Table 55. Registration assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 303

Table 56. Transfer roller assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 305

Table 57. Delivery assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 307

Table 58. PCB assembly location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 309

Table 59. 2000-sheet feeder (optional tray 4) main body (1 of 2) . . . . . . . . . . 311

Table 60. 2000-sheet feeder (optional tray 4) main body (2 of 2) . . . . . . . . . . 313

Table 61. 2000-sheet feeder (optional tray 4) drive assembly . . . . . . . . . . . . 314

Table 62. 2000-sheet feeder (optional tray 4) PCB location . . . . . . . . . . . . . . 315

Table 63. Optional tray 1 assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 317

Table 64. 3000-sheet stapler/stacker (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . 319

Table 65. 3000-sheet stapler/stacker (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . 321

Table 66. 3000-sheet stacker (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 323

Table 67. 3000-sheet stacker (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 325

Table 68. Alphabetical parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 326

Table 69. Numerical parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 334

x List of tables C8519-90912

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List of figures

Figure 1. Sample identification label . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Figure 2. Front assembly locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

Figure 3. Back assembly locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Figure 4. Interface connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

Figure 5. Optional accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Figure 6. Requirements for base model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

Figure 7. Requirements with 3000-sheet stapler/stacker and 2000-sheet

feeder installed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

Figure 8. Sample seams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32

Figure 9. Adhesive labels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

Figure 10. Long, short, and diagonal grain curl . . . . . . . . . . . . . . . . . . . . . . . . . 37

Figure 11. Measuring curl . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Figure 12. Media trays, bins, and paper handling . . . . . . . . . . . . . . . . . . . . . . . 40

Figure 13. Control panel layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Figure 14. Registration page (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49

Figure 15. Registration page (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50

Figure 16. Menu map page 1 (common functions) . . . . . . . . . . . . . . . . . . . . . . . 55

Figure 17. Menu map page 2 (common functions) . . . . . . . . . . . . . . . . . . . . . . . 56

Figure 18. Menu map page 3 (administrative funct ions) . . . . . . . . . . . . . . . . . .57

Figure 19. Menu map page 4 (administrative funct ions) . . . . . . . . . . . . . . . . . .57

Figure 20. Menu map page 5 (administrative funct ions) . . . . . . . . . . . . . . . . . .58

Figure 21. Menu map page 6, Control panel instructions . . . . . . . . . . . . . . . . . . 59

Figure 22. EIO slots . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63

Figure 23. Remove power cord . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70

Figure 24. Remove print cartridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

Figure 25. Wipe residue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71

Figure 26. Replace print cartridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Figure 27. Lock print cartridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72

Figure 28. Close front cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72

Figure 29. Sample cleaning page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

Figure 30. Printer systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .79

Figure 31. Sequence of operation block diagram . . . . . . . . . . . . . . . . . . . . . . . . 80

Figure 32. Timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83

Figure 33. Engine control system block diagram . . . . . . . . . . . . . . . . . . . . . . . . 84

Figure 34. DC controller circuit block diagram . . . . . . . . . . . . . . . . . . . . . . . . . .85

Figure 35. High-voltage power supply block diagram . . . . . . . . . . . . . . . . . . . . 87

Figure 36. Power supply block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

Figure 37. Laser/scanner system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92

Figure 38. Image formation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .93

Figure 39. Cutaway view of print cartridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . .94

Figure 40. Pickup and feed system sensors and switches . . . . . . . . . . . . . . . . 98

Figure 41. Pickup and feed system motors and solenoids . . . . . . . . . . . . . . . .100

Figure 42. Optional tray 1 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . .102

Figure 43. Optional tray 4 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . .104

Figure 44. Stapler/stacker main modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

Figure 45. Stapler/stacker jam detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

Figure 46. Full bin condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .109

Figure 47. Stacker main modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

Figure 48. Stacker jam detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

C8519-90912 xi

Page 14

Figure 49. Full bin condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

Figure 50. View of front and right side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

Figure 51. View of back and left side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

Figure 52. Removing the right top cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

Figure 53. Removing the left top cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

Figure 54. Removing the front cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121

Figure 55. Removing the right door (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . 122

Figure 56. Removing the right door (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . 122

Figure 57. Removing the right lower cover . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

Figure 58. Removing the left door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124

Figure 59. Removing the left back cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

Figure 60. Removing the back cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126

Figure 61. Removing the rail covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127

Figure 62. Removing the control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128

Figure 63. Removing the laser/scanner assembly . . . . . . . . . . . . . . . . . . . . . 129

Figure 64. Removing the delivery assembly . . . . . . . . . . . . . . . . . . . . . . . . . . 130

Figure 65. Removing the delivery fan assembly . . . . . . . . . . . . . . . . . . . . . . . 131

Figure 66. Removing the delivery assembly fans and face-down bin fan

(1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132

Figure 67. Removing the delivery assembly fans and face-down bin fan

(2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132

Figure 68. Removing the delivery motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133

Figure 69. Removing the cartridge release lever (1 of 2) . . . . . . . . . . . . . . . . 134

Figure 70. Removing the cartridge release lever (2 of 2) . . . . . . . . . . . . . . . . 134

Figure 71. Removing the print cartridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135

Figure 72. Removing the transfer roller assembly . . . . . . . . . . . . . . . . . . . . . . 136

Figure 73. Removing tray 2 or tray 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136

Figure 74. Removing the rollers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137

Figure 75. Removing the fuser jam removal knob . . . . . . . . . . . . . . . . . . . . . . 138

Figure 76. Removing the registration jam removal knob . . . . . . . . . . . . . . . . . 139

Figure 77. Removing tray 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140

Figure 78. Removing the PIU (1 of 5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141

Figure 79. Removing the PIU (2 of 5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141

Figure 80. Removing the PIU (3 of 5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142

Figure 81. Removing the PIU (4 of 5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142

Figure 82. Removing the PIU (5 of 5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143

Figure 83. Removing the registration assembly (1 of 2) . . . . . . . . . . . . . . . . . 144

Figure 84. Removing the registration assembly (2 of 2) . . . . . . . . . . . . . . . . . 144

Figure 85. Removing the transfer guide assembly . . . . . . . . . . . . . . . . . . . . . 145

Figure 86. Reinstalling the transfer guide assembly . . . . . . . . . . . . . . . . . . . . 145

Figure 87. Removing the duplexer (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . 146

Figure 88. Removing the duplexer (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . 146

Figure 89. Removing the fuser assembly (1 of 2) . . . . . . . . . . . . . . . . . . . . . . 147

Figure 90. Removing the fuser assembly (2 of 2) . . . . . . . . . . . . . . . . . . . . . . 147

Figure 91. Removing the formatter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148

Figure 92. Removing the LVPS (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149

Figure 93. Removing the LVPS (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149

Figure 94. Removing the HVPS (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150

Figure 95. Removing the HVPS (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150

Figure 96. Removing the DC controller (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . 151

Figure 97. Removing the DC controller (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . 151

Figure 98. Removing the toner-sensor contact assembly . . . . . . . . . . . . . . . . 152

Figure 99. Removing the cartridge memory PCA . . . . . . . . . . . . . . . . . . . . . . 153

Figure 100. Removing the drum motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154

Figure 101. Removing the feed-drive assembly . . . . . . . . . . . . . . . . . . . . . . . 155

Figure 102. Removing the power supply fan . . . . . . . . . . . . . . . . . . . . . . . . . . 156

Figure 103. Removing the cartridge fan (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . 157

Figure 104. Removing the cartridge fan (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . 157

Figure 105. Removing the controller fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158

xii List of figures C8519-90912

Page 15

Figure 106. Removing the left side cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159

Figure 107. Removing the right side cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160

Figure 108. Removing the back covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161

Figure 109. Removing tray 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .162

Figure 110. Removing the rollers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163

Figure 111. Removing the registration assembly (1 of 2) . . . . . . . . . . . . . . . . . 164

Figure 112. Removing the registration assembly (2 of 2) . . . . . . . . . . . . . . . . . 164

Figure 113. Removing the drive motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .165

Figure 114. Removing the drive assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . .165

Figure 115. Removing the controller board (1 of 2) . . . . . . . . . . . . . . . . . . . . . 166

Figure 116. Removing the controller board (2 of 2) . . . . . . . . . . . . . . . . . . . . . 166

Figure 117. Removing the paper-size switch PCB (1 of 2) . . . . . . . . . . . . . . . 167

Figure 118. Removing the paper-size switch PCB (2 of 2) . . . . . . . . . . . . . . . 167

Figure 119. Removing the power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168

Figure 120. Removing the pickup assembly (1 of 2) . . . . . . . . . . . . . . . . . . . .169

Figure 121. Removing the pickup assembly (2 of 2) . . . . . . . . . . . . . . . . . . . .169

Figure 122. Removing the paper connecting unit . . . . . . . . . . . . . . . . . . . . . . . 170

Figure 123. View of front and left side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172

Figure 124. View of back and right side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172

Figure 125. Removing the face-up bin and the stapler/stacker bin . . . . . . . . .173

Figure 126. Removing the back inner cover and front in ner cover (1 of 2) . . .174 Figure 127. Removing the back inner cover and front in ner cover (2 of 2) . . .174

Figure 128. Removing the front cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .175

Figure 129. Removing the back cover (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . 176

Figure 130. Removing the back cover (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . 176

Figure 131. Removing the foot cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177

Figure 132. Removing the stapler/stacker and stacker door assembly . . . . . . 177

Figure 133. Removing the controller PCA cover . . . . . . . . . . . . . . . . . . . . . . . 178

Figure 134. Removing the flipper assembly . . . . . . . . . . . . . . . . . . . . . . . . . . .179

Figure 135. Removing the paper path assembly . . . . . . . . . . . . . . . . . . . . . . . 180

Figure 136. Removing the accumulator wings . . . . . . . . . . . . . . . . . . . . . . . . . 181

Figure 137. Removing the paper stopper clips . . . . . . . . . . . . . . . . . . . . . . . . . 182

Figure 138. Removing the accumulator assembly (1 of 3) . . . . . . . . . . . . . . . .183

Figure 139. Removing the accumulator assembly (2 of 3) . . . . . . . . . . . . . . . .183

Figure 140. Removing the accumulator assembly (3 of 3) . . . . . . . . . . . . . . . .184

Figure 141. Removing the carriage assembly (1 of 2) . . . . . . . . . . . . . . . . . . .185

Figure 142. Removing the carriage assembly (2 of 2) . . . . . . . . . . . . . . . . . . .185

Figure 143. Removing the offset module (1 of 2) . . . . . . . . . . . . . . . . . . . . . . .186

Figure 144. Removing the offset module (2 of 2) . . . . . . . . . . . . . . . . . . . . . . .186

Figure 145. Removing the stapler (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187

Figure 146. Removing the stapler (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187

Figure 147. Removing the stapler/stacker controller PCA . . . . . . . . . . . . . . . . 188

Figure 148. Removing the stacker controller PCA . . . . . . . . . . . . . . . . . . . . . . 188

Figure 149. Removing the stapler/stacker power supply . . . . . . . . . . . . . . . . . 189

Figure 150. Removing the stacker power supply . . . . . . . . . . . . . . . . . . . . . . . 189

Figure 151. Removing the LED PCA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190

Figure 152. Removing the interlock switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191

Figure 153. Removing the safety switch assembly . . . . . . . . . . . . . . . . . . . . . 192

Figure 154. Removing the optical sensors (1 of 3) . . . . . . . . . . . . . . . . . . . . . . 193

Figure 155. Removing the optical sensors (2 of 3) . . . . . . . . . . . . . . . . . . . . . . 193

Figure 156. Removing the optical sensors (3 of 3) . . . . . . . . . . . . . . . . . . . . . . 194

Figure 157. Removing the cable assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 194

Figure 158. Removing the stationary caster . . . . . . . . . . . . . . . . . . . . . . . . . . . 195

Figure 159. Removing the adjustable caster . . . . . . . . . . . . . . . . . . . . . . . . . .195

Figure 160. Basic troubleshooting process flow (1 of 2) . . . . . . . . . . . . . . . . .200

Figure 161. Basic troubleshooting process flow (2 of 2) . . . . . . . . . . . . . . . . .201

Figure 162. Event log page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .208

Figure 163. Example of events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209

Figure 164. Test print switch location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 240

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Figure 165. Sample test print page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 240

Figure 166. Test print switch location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245

Figure 167. Sample test print page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245

Figure 168. 2000-sheet feeder label . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 246

Figure 169. Stapler/stacker label . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250

Figure 170. Stacker label . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250

Figure 171. Sample configuration page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 257

Figure 172. Sample Jetdirect configuration page . . . . . . . . . . . . . . . . . . . . . . 259

Figure 173. Sample supplies status page . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260

Figure 174. Sample usage page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 261

Figure 175. Sample file directory page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 262

Figure 176. Image defect examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 265

Figure 177. Repeating defect ruler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 273

Figure 178. Wiring diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 277

Figure 179. Printer external covers and panels . . . . . . . . . . . . . . . . . . . . . . . . 284

Figure 180. Left door and diverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 286

Figure 181. Right cover assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 288

Figure 182. Internal components (1of 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 290

Figure 183. Internal components (2 of 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 292

Figure 184. Internal components (3 of 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 294

Figure 185. Internal components (4 of 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 296

Figure 186. Drum feed drive assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 298

Figure 187. Fuser delivery drive assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 299

Figure 188. Cartridge lifter assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300

Figure 189. 500-sheet trays (tray 2 and 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . 301

Figure 190. PIU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 302

Figure 191. Registration assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 303

Figure 192. Transfer roller assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 304

Figure 193. Delivery assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 306

Figure 194. PCB assembly location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 308

Figure 195. 2000-sheet feeder (optional tray 4) main body (1 of 2) . . . . . . . . 310

Figure 196. 2000-sheet feeder (optional tray 4) main body (2 of 2) . . . . . . . . 312

Figure 197. 2000-sheet feeder (optional tray 4) drive assembly . . . . . . . . . . . 314

Figure 198. 2000-sheet feeder (optional t ray 4) PCB location . . . . . . . . . . . . 315

Figure 199. Optional tray 1 assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 316

Figure 200. 3000-sheet stapler/stacker (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . 318

Figure 201. 3000-sheet stapler/stacker (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . 320

Figure 202. 3000-sheet stacker (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 322

Figure 203. 3000-sheet stacker (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 324

xiv List of figures C8519-90912

Page 17

1 Product information

Chapter contents

Product features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Product specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Product overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

External assembly locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

Interface connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Optional accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

Regulatory information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

Regulatory requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

FCC regulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

Declaration of conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

Environmental product stewardship program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

Service approach . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Parts and supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Limited warranty for print cartridge life . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Service and support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

Worldwide service and support offices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

C8519-90912 Chapter contents 15

Page 18

Product features

HP LaserJet 9000 printer (C8519A)

The HP LaserJet 9000 printer comes standard with 64 MB RAM, wide-format printing, and two 500-sheet trays (tray 2 and tray 3).

HP LaserJet 9000n printer (C8520A)

The HP LaserJet 9000n printer comes standard with 64 MB RAM, wide-format printing, two 500-sheet trays (tray 2 and tray 3), a 100-sheet multipurpose tray (optional tray 1), and an optional HP Jetdirect print server.

HP LaserJet 9000dn printer (C8521A)

The HP LaserJet 9000dn printer comes standard with 64 MB RAM, wide-format printing, two 500-sheet trays (tray 2 and tray 3), a 100-sheet multipurpose tray (optional tray 1) , an optional HP Jetdirect print server, and an optional duplex printing accessory (for printing on both sides of paper).

HP LaserJet 9000hns printer (C8522A)

The HP LaserJet 9000hns printer contains the HP LaserJet 9000dn, a 2000-sheet feeder (optional tray 4), and an optional 3000-sheet stapler/s tacker.

Table 1. Features of the HP LaserJet 9000 Series printers

Speed

Resolution

Toner

PCL printer language and fonts

PS language and fonts

Automatic language switching

Enhanced memory and memory expansion

l 50 pages per minute (ppm) for letter-size print media and A4-size media. l First page out in less than 8 seconds. l Transmit Once, Raster Image Processing (RIP) Once technology.

l 600 dots per inch (dpi) with Resolution Enhancement technology (REt). l HP FastRes 1200 (1200-dpi-like quality at up to 50 ppm letter and A4). l Up to 256 levels of gray.

l HP UltraPrecise print cartridge. Capacity rated at average 30,000 pages

with 5 percent coverage.

l EconoMode capability. l Fast printing performance, built-in Intellifont and TrueType

technologies, built-in HP-GL/2 vector graphics, and advanced imaging capabilities are benefits of the printer control language (PCL) 6 printer language. PCL 6 also includes 80 scalable TrueType fonts and one bitmapped Line Printer Font.

l PostScript

included.

l The printer automatically determines and switches to the appropriate

language for the print job.

l The HP LaserJet 9000 Series printers come with 64 MB of memory and

can be expanded to 384 MB.

(PS) Level 3 emulation with 35 built-in PS language fonts

scaling

16 Chapter 1 Product information C8519-90912

Page 19

Table 1. Features of the HP LaserJet 9000 Series printers (continued)

Expandability All models accept:

l Optional tray 1, a 100-sheet or 10-envelope multipurpose tray for

automatic and manual feeding of envelopes, labels, transparencies, custom-sized media, 98 by 191 mm (3.8 by 7.5 in) to 312 by 470 mm (12.3 by 18.5 in), and heavy paper.

l Optional tray 4, a 2000-sheet tray that supports letter, legal, B4, A4,

11 by 17 in, A3, e x ecutive, B5, and custom 182 by 210mm (7.2 by 8.3 in) to 297 by 431.8 mm (11.7 by 17 in) print media.

l Optional duplexer. l Optional 3000-sheet stapler/stacker or 3000-sheet stacker. l Enhanced input/output (EIO) cards. l Dual inline memory module (DIMM) slots for adding memory and fonts. l Hard disk for RIP Once capability, job retention features, and font

storage.

Wireless printing

Interface connection

Networking

Duty cycle

l The printer supports wireless printing with the installation of a Fast

InfraRed Connect pod.

l Bidirectional ECP type-C parallel port (IEEE-1284 compliant). l Three EIO slots for hard disk accessory or print server installation. l Wireless Fast InfraRed port (IrDA compliant). l Foreign interface connector. l HP Jet-Link connector.

l Three EIO slots for hard disk accessory or print server installation. l An HP 610N Jetdirect print server is included with HP LaserJet 9000n,

9000dn, and 9000hns.

l 300,000 images per month.

C8519-90912 Product features 17

Page 20

Product specifications

Identification

The model number and printer serial number are listed on an identification label located on the rear cover. The model number is alphanumeric, such as C8519A.

The serial number contains information about the country of origin, the revision level, the production code, and production number of the printer. An example of a serial number is USBB123456.

The top label also contains power r ating and regulatory information. See figure 1.

Note The power rating and regulatory information vary by region.

Electrical information Regional certification

Model and serial number

Figure 1. Sample identification label

Table 2. Configuration comparison

HP LaserJet 9000

Standard memory Maximum memory

PS Level 3 emulation

Jetdirect print server Optional Standard Standard Standard Optional duplexer Optional Optional Standard Standard Optional tray 1,

100-sheet multipurpose tray

Optional tray 4, 2000-sheet feeder

Optional 3000-sheet stacker

Optional 3000-sheet stapler/stacker

Optional hard disk Optional Optional Optional Optional

64 MB 384 MB

Standard Standard Standard Standard

Optional Standard Standard Standard

Optional Optional Optional Standard

Optional Optional Optional Optional

Optional Optional Optional Standard

HP LaserJet 9000n

64 MB 384 MB

Manufacture date

HP LaserJet 9000dn

64 MB 384 MB

HP LaserJet 9000hns

64 MB 384 MB

18 Chapter 1 Product information C8519-90912

Page 21

Table 3. Physical specifications

HP LaserJet 9000 HP La serJet 9000n/

HP LaserJet 9000hns

9000dn

Height 600 mm (23.6 in) 600 mm (23.6 in) 1036.4 mm (40.8 in) Width 990.8 mm (39.0 in) 1115.8 mm (44.4 in) 1788.2 mm (70.4 in) Depth 1001 mm (42.7 in) 1001 mm (42.7 in) 1001 mm (42.7 in) Weight

(without print cartridge)

63.5 kg (140 lb) 9000n, 69.4 kg (153 lb) 9000dn, 76.2 kg (158 lb)

76.2 kg (158 lb)

Table 4. Electrical specifications

Volts Frequency Amperes (A) Watts (W) (typical) Thermal units per hour

(BTu/hr)

100-127 Vac ± 10 percent

220-240 Vac ± 10 percent

50/60 Hz ± 2 Hz

Minimum recommended current capacity = 15 amp dedicated circut

Minimum recommended current capacity =

6.5 amps

printing = 1040 W standby = 265 W PowerSave 1 = 40 W PowerSave 2 = 25 W off = 0 W

printing = 995 W standby = 265 W PowerSave 1 = 40 W PowerSave 2 = 25 W off = 0.2 W

printing = 3550.36 BTu/hr standby = 904.71 BTu/hr PowerSave 1 = 136.56 BTu/hr PowerSave 2 = 85.35 BTu/hr off = 0 BTu/hr

printing = 3396.93 BTu/hr standby = 904.71 BTu/hr PowerSave 1 = 136.56 BTu/hr PowerSave 2 = 85.35 BTu/hr off = 0.69 BTu/hr

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

voltages. This can damage the printer and void the product warranty. The following en vironment al specifications m ust be mainta ined to ensure the corre ct opera tion of the

printer. Consider the following points before installing the printer:

l Place the printer on a sturdy, level surface. l Allow adequate space around the printer for unimpeded operation. l Install the printer in a well-ventilated room. l Prevent exposure to direct sunlight or chemicals, including ammonia-based cleaning solutions. l Ensure that an adequate power supply is used. l Install the printer in environment where no abrupt temper ature or humidity changes occur .

Table 5. Environmental specifications

Operating/printing Storage/standby

Temperature (printer and print cartridge)

Relative humidity 20 percent to 80 percent 15 percent to 90 percent

10 degrees to 32.5 degrees C (50 degrees to 90.5 degr e e s F)

-20 degrees to 40 degrees C (-4 degrees to 104 degrees F)

Table 6. Noise-level specifications

Operator position Bystander (1m) Sound power

Printing at 50 ppm L Idle L PowerSave L

59 db(A) L

Pam

43 db(A) L

Pam

inaudible L

Pam

55 db(A) L

Pam

41 db(A) L

Pam

inaudible L

Pam

WAd WAd

WAd

7.1 db(A)

6.0 db(A)

inaudible

Note Testing per International Standards Organization (ISO) 9296.

C8519-90912 Product specifications 19

Page 22

Product overview

External assembly locations

Face-up bin

Control panel

Power switch

Tray 3

Figure 2. Front assembly locations

Top covers

Test print switch

Front cover

Right cover

Tray 2

Face-down bin

Back cover Left cover

Power receptacle

Figure 3. Back assembly locations

Formatter board

20 Chapter 1 Product information C8519-90912

Page 23

Interface connections

I/O slots

Parallel connector

HP Jetdirect print server (optional)

Foreign interface connector (not used)

HP Fast InfraRed Connect (optional IR pod)

HP Jet-Link connector (optional accessories connect)

Figure 4. Interface connections

C8519-90912 Product over view 21

Page 24

Optional accessories

HP Fast InfraRed Connect pod

3000-sheet stapler/stacker

Duplexer

Figure 5. Optional accessories

3000-sheet stacker

2000-sheet feeder (tray 4)

Multipurpose tray (tray 1)

22 Chapter 1 Product information C8519-90912

Page 25

Regulatory information

Regulatory requirements

For regulatory information and requirements, please see the Start guide.

FCC regulations

For FCC regulations, please see the Start guide.

Declaration of conformity

For declaration of conformity information, please see the Start guide.

Environmental product stewardship program

For environmental product stewardship program information, please see the Use guide.

C8519-90912 Regulatory information 23

Page 26

Service approach

Repair of the printer normally begins with a three-step process:

l Isolate the problem to the major system (the host computer, the network and/or server, or the

printer system).

l Determine whether the problem is located in one of the paper-handling devices or in the printer

engine.

l Troubleshoot the problem using the procedures in chapter 7.

Once a faulty part is located, repair is usually accomplished by assembly level replacement of field replaceable units (FRUs). Some mechanical assemblies may be repaired at the subassembly level. Replacement of components on the printed circuit assemblies is not supported by Hewlett-Packard.

Parts and supplies

Ordering information

"Ordering parts" in chapter 8 of this manual contains FRU and replacement part numbers. Replacement parts can be ordered from the HP Customer Services and Support Organization (CSSO).

"Consumables, supplies, accessories, FRUs, and documentation" in chapter 8 of this manual contains accessories specifica lly des ign e d for this printer. Order accessories from CSSO.

Note See "Worldwide service and support offices" on page 25 for a local HP off ice in the appropriate region.

Phone listing

l CSSO (for U.S.)

(1) (800) 752-0900

l CSSO (for Canada)

(1) (800) 387-3867

l CSSO (for Europe)

(49 7031) 142253

Exchange program

HP offers remanufactured assemblies for some parts. These are identified in "Illustrations and parts lists" in chapter 8, and can be ordered through CSSO.

Consumables

The printer has two consumable, the print cartridge, the preventiv e maintenance kit, and the stapler/ stacker has one consumable, the staple cartridge. These are identified in "Illustrations and parts lists" in chapter 8, and can be ordered through CSSO.

Warranty

For warr anty information and requirements, see the Start guide.

Limited warranty for print cartridge life

For print cartridge warranty information, see the Start guide.

24 Chapter 1 Product information C8519-90912

Page 27

Service and support

World Wide Web

Printer drivers, updated HP printer softw are, and product and support information can be obtained from the following URLs:

l U.S., http://www.hp.com/support/lj9000 l Europe, http://www.hp.com/support/lj9000 l China, ftp://www.hp.com.cn/support/lj9000 l Japan, ftp://www.jpn.hp.com/support/lj9000 l Korea, http://www.hp.co.kr/support/lj9000 l Taiwan, http://www.hp.com.tw/support/lj9000, or the local driver website, http://www.dds.com.tw

HP support assistant CD-ROM

This support tool offers a comprehensive online information system designed to provide technical and product information about He wlett-Packard products . To subscribe to this quarterly service in the U.S. or Canada, call (1) (800) 457-1762. In Hong Kong, Indonesia, Malaysia, or Singapore, call Mentor Media at (65) 740-4477.

HP-authorized resellers and support

To locate HP-authorized resellers and support, call (1) (800) 243-9816 in the U.S. or (1) (800) 387-3867 in Canada.

HP service agreements

Call (1) (800) 743-8305 in the U.S. or (1) (800) 268-1221 in Canada.

Other areas

Outside of North America, contact your local HP sales office for assistance in obtaining technical support for resellers and service technicians. See "Worldwide service and support offices" below.

Worldwide service and support offices

Customer support and product repair assistance for the U.S. and Canada

l For the U .S., call (1) (208) 323-2551 Monday th rough Friday from 6 A.M. to 6 P.M., Mountain time. l For Canada, call (1) (905) 20 6-466 3 or (1) (800) 387- 3867 Mond ay through F riday from 8 A.M. to

P.M., Mountain time.

Support is free of charge during the warranty period. However, your standard long-distance phone charges still apply. Before calling, have your system nearby and your serial number ready.

If you know your printer needs repair, call (1) (800) 243-9816 to locate your nearest HP-authorized service provider.

C8519-90912 Service approach 25

Page 28

Customer support and product repair assistance for other customers

HP provides a free telephone support service during the warranty period. By calling the appropriate telephone number for your country or region, you will be connected to a responsive team waiting to help you. If you require support after your warranty has expired, you can receive support for a fee through the same telephone number. The fee is charged on a per-incident basis. When calling HP, have the following information ready: product name and serial number, date of purchase, and description of the problem.

Europe

l Austria: 43 (0)810 00 6080 l Belgium

Dutch: 32 (0)2 626-8806 French: 32 (0)2 626-8806

l Czech Republic: 42 (0)2 6130 7310 l Denmark: +45 39 29 4099 l International English: +44 (0)207 512 52 02 l Finland: 358 (0)203 47 288 l France: 33 (0)1 43 62 34 34 l Germany: 49 (0)180 52 58 143 l Greece: +30 (0)1 619 64 11 l Hungary: +36 (0)1 382-1111 l Ireland: +353 (0)1 662 5525 l Italy: 39 02 264 10350

Africa and Middle East

l Egypt: +202 7956222 l International English: +44 (0)207 512 52 02 l Israel: +972 (0)9 9524848 l South Africa

Inside RSA: 086 000 1030 Outside RSA: +27-11 258 9301

l Netherlands: 31 (0)20 606 8751 l Norway: 47 22 11 6299 l Poland: +48 22 865 98 00 l Portugal: 351 21 3176333 l Romania: +40 1 315 44 42 (or 01 3154442) l Russian Federation

Moscow: +7 095 797 3520 St. Petersburg: +7 812 346 7997

l Spain: +34 902 321 123 l Sweden: +46 (0)8 619 2170 l Switzerland: +41 (0)848 80 11 11 l Turkey: +90 212 221 69 69 l Ukraine: +7 (380-44) 490-3520 l U.K.: +44 (0)207 512 52 02

l United Arab Emirates, Bahrain, Jordan, Kuwait,

Lebanon, Oman, Palestine, Qatar, Saudi Arabia, Yemen: 971 4 883 8454

Asia-Pacific

l Australia: (03) 8877 8000 l China: +86 (0)10 6564 5959 l Hong Kong: +85 (2) 2802 4098 l India: +91 11 682 6035 l Indonesia: +62 (21) 350-3408 l Japan: +81 3 3335-8333 l Republic of Korea

Seoul: +82 (2) 3270-0700 Outside Seoul: 080 999-0700

l Malaysia: +60 (3) 295 2566 l New Zealand: +64 (9) 356 6640 l Philippines: +63 (2) 867 3551 l Singapore: +65 272 5300 l Taiwan: +886 (2) 2717 0055 l Thailand: +66 (2) 661 4000 l Vietnam: +84 (0) 8 823 4530

Latin America

l Argentina: 0810-555-5520 l Brazil

Greater Sao Paulo: (11) 3747-7799 Outside Greater Sao Paulo: 0800-157751

l Chile: 800-22-5547 l Guatemala: 800-999-5305

l Mexico

l Peru: 0-0800-10111 l Puerto Rico: 1-877-2320-589 l Venezuela

Mexico City: 52-58-9922 Outside Mexico City: 01-800-472-6684

Caracas: 207 8488 Outside Caracas: 800 47 777

26 Chapter 1 Product information C8519-90912

Page 29

2 Product requirements

Chapter contents

Site requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

Operating environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

Space requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Media specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Guidelines for selecting paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

Special media specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Storing print media . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Testing media specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Tools and suppliers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

Media input/output options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40

Trays, bins, and paper handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Media sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

C8519-90912 Chapter contents 27

Page 30

Site requirements

Operating environment

The electrical and environmental specifications must be maintained to ensur e the proper operation of this printer. See "Product specifications" in chapter 1. Consider the following points before installing the printer:

l Install in a well-ventilated, dust-free area. l Install on a level, flat surface that can support the printer size and weight. Make sure all four

printer feet are level. Do not install on carpet or on other soft surfaces.

l Ensure adequate power supply circuitry. See "Product specifications" in chapter 1. l Install where there is stable temperature an d humidity, with no abrupt changes (away f rom water

sources, humidifiers, air conditioners, refrigerators, or other major appliances). See "Product specifications" in chapter 1.

l Install away from direct sunlight, areas that experience vibration, open flames, ultrasonic

heaters, ammonia fumes, or magnets and devices that emit a magnetic field. If the printer is placed near a window, make sure the window has a curtain or blind to block direct sunlight.

l Maintain enough space around the printer for proper access and ventilation. See "Space

requirements" on page 29.

28 Chapter 2 Product requirements C8519-90912

Page 31

Space requirements

352.8 mm (13.9 in) 638 mm (25.1 in)

633 mm (24.9 in)

(17.8 in)

368 mm

352.8 mm (13.9 in) 638 mm (25.1 in)

Figure 6. Requirements for base model

600 mm (23.6 in)

C8519-90912 Site requirements 29

Page 32

2296.2 mm (90.4 in)

1001 mm (39.4 in)

2296.2 mm (90.4 in)

need new picture

1036.4 mm (40.8 in)

Figure 7. Requirements with 3000-sheet stapler/stacker and 2000-sheet feeder installed

30 Chapter 2 Product requirements C8519-90912

Page 33

Media specifications

Note Before purchasing large quant ities of paper, make sure the paper meets the requirements specified

in this service manual and in the HP LaserJet Printer Family Print Media Guide. See "Media input/ output options" on page 40. Always test print media before buying large quantities.

Note HP neither warrants nor recommends the use of a particular brand of paper or print media. Media

properties are subject to manufacturing changes, and Hewlett-Packard has no control over such changes. Although testing media helps to characterize the performance and process quality by the manufacturer, the customer assumes all responsibility for the quality and performance of media.

Guidelines for selecting paper

For best results , use co nventional 75 g/m2 (20 lb) paper. Make sure the paper is of go od qu ality, and free of cuts, nick s, tears, spots, loose particles, dust, wrinkles, voids, and curled or bent edges.

Note Some print media might meet all of the guidelines in this manual and still not pro duce satisfactory

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

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

l For information about measu ring basis weight, see "Basis weight field test" on page 35. l For information about measuring caliper, see "Caliper field test" on page 37. l For information about smoothness, see "Paper finish field test" on page 37.

Hint Do not purchase more media than can be easily used in a short time (about 3 months). Media stored

for long periods e xperiences heat and moisture e xtremes that can be damaging . Planning is important to prevent damage to a large supply of media.

Special media specifications

Envelope specifications

Successful printing on envelopes depends up on the quality of t he en v elopes. Env elop e f old lines can vary considerably, not only between manufacturers, but also within a box from the same manufacturer. When selecting envelopes, consider the following components:

l Construction—Prior to printing, envelopes should lie flat with less than 10 mm (0.39 in) curl,

and have well-constructed seams.

l Condition—Envelopes should not be wrinkled, nicked, or otherwise damaged. l Temper ature—Envelopes should be compatible with the heat and pressure produced by the

printer.

C8519-90912 Media specifications 31

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Figure 8. Sample seams

Note Print envelopes from op tional tray 1 only. Send envelopes straight through the printer, entering at

optional tray 1 and exiting from the face-up bin.

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

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

Envelopes with adhesive strips or flaps

Check to make sure that envelopes with peel-off adhesive strips, or with more than one flap that folds ov er to seal, u se adhesiv es compatib le with the he at and pressure in the printer. The ex tra flaps and strips might cause wrinkling, creasing, jams, and can even damage the fuser.

Label specifications

CAUTION To avoid damaging the printer , use only labels recommended for laser printers. Never print on the

same sheet of labels more than once and never print on a partial sheet of labels. When selecting labels, consider the quality of each component:

l Adhesives—The adhesive material should be stable at 190 degrees C (374 degrees F), which

is the printer fusing temperature.

l Arrangement—Do not use labels that have e xposed bac king be tween t hem. Labels can pee l off

sheets with spaces between the labels, causing jams.

l Curl—Prior to printing, labels must lie flat with no more than 10 mm (0.39 in) of curl in any

direction.

l Condition—Do not use labels that have wrinkles, bubbles, or other indications of separation.

Note Use only optional tray 1 to print labels. Send labels straight through the printer, entering at optional

tray 1 and exiting from the face-up bin.

32 Chapter 2 Product requirements C8519-90912

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Figure 9.

Adhesive labels

Transparency specifications

To avoid damaging the printer, use only transparencies recommended for use in laser printers.

l Construction—Prior to printing, transparencies should lie flat with less than 10 mm (0.39 in)

curl.

l Condition—Transparencies should not be wrinkled, nicked, or otherwise damaged. l Temper ature—Transparencies should be stable at 190 degrees C (374 degrees F), which is the

printer fusing temperature.

Note If problems occur while printing transparencies, use optional tray 1. Send tr ansparencies straight

through the printer, entering at optional tray 1 and exiting from the face-up bin.

CAUTION Transparencies used in the printer must be able to withstand 190 degrees C (374 degrees F), the

printer fusing temperature.

Preprinted forms and special letterhead

Many preprinted forms and special letterhead papers perf orm well in HP LaserJet printers . How ever , these papers undergo processes that alter their original characteristics, and care must be taken to ensure they conform to HP specifications. All special papers should be wrapped in moisture-proof wrapping when purchased from the paper converter or printing house.

Forms and letterhead must be printed with inks that conform to the following specifications:

l Only use ink that is heat-resistant, and that will not melt, scorch, or release hazardous emissions

when subjected to 200 degrees C (392 degrees F) for 0.1 second.

l Inks must have resistance to silicon oils, and must not be affected by resin components in toner. l Inks must not be flammable. l Inks must not “offset” (transfer from the printed pap er onto the printer, contaminating internal

printer components). The principle cause of offset is ink that is not fully dried or that cannot withstand the printer fusing tem p eratu re.

Note Do not use low-temperature inks (the kind used with thermography).

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Embossed media

Embossed media is not recommended for use in HP LaserJet printers. Media is embossed by stamping an image into the media by compressing the media fibers together at approximately 200 degrees C (392 degrees F), and sometimes by applying a thin metal f oil to the surface. The printer fusing process can loosen the foil; loose foil can interfere with the mechanical and electronic operation of the printer.

Embossed paper, with or without foil, can also cause multifeed jams. Multiple embossed print media sheets tend to stick to one another.

Media with cutouts or perforations

Avoid media with cutouts or perforat ions for these reasons:

l Cut fibers absorb more moisture and can increase waviness and media curl. This decreases the

print quality near the cutout or perforated area.

l Cutting knives leave a sharp edge on the cutout or perforation. If the sharp edge is facing the

print cartridge drum during printing, it can scratch the drum surface.

l If printing occurs over a cutout hole, the transfer roller is contamin ated with unused toner,

creating light streaks on the paper.

Chemically treated media

Coatings such as lacquers, polymers, laminations, or other chemicals protect the paper, but can cause problems in the fuser and tr ansfer areas of HP LaserJet printers. The surface resistivity and moisture content can be greatly altered, resultin g in print-qu ality problems. Hard surfa ce coatings increase wear on the rollers and media guides. All chemically treated media must meet HewlettPackard specifications for fusing compatibility.

Synthetic media

Synthetic media (those manufactured from man-made fibers) do not perform as well as bond media in any printer, especially HP LaserJet printers. All synthetic media must meet Hewlett- Packard specifications, especially for caliper and fusing compatibility.

Coated media

Do not use coated media. Most coated media does not meet specifications for fusing compatibility and other specifications for HP LaserJet printers.

Other special media

l Odd sizes. Check minimum and maximum supported sizes in chapter 2. l Carbonless media. Carbonless media (NCR) is not supported by HP LaserJet printers. l Recycled media. Choose recycled media that meets Hewlett-Packard specifications. Note that

recycled media might not be as bright as indicated in the specifications. Hewlett-Packard recommends that recycled media contain no more than 5 percent groundwood. See "Testing media specifications" on page 35.

Storing print media

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

Heat works with humidity to damage paper. Heat causes the moisture in paper to evaporate, while cold causes it to condense on the sheets. Heating systems and air conditioners remov e most of the humidity from a room. As a paper package is opened and used, it loses moisture, causing streaks

34 Chapter 2 Product requirements C8519-90912

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and smudging. Humid weather or water coolers can cause the humidity in a room to increase. As a package of paper is opened and used, it absorbs any excess moisture, causing light print and dropouts. Also, as paper loses and gains moisture, it can distort. This can cause jams.

Therefore, paper storage and handling are as important as the paper-making process itself. Paper storage environmental conditions dir ectly affect the feed operation.

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

Unopened paper in sealed package s can remain stable for several months before use. Opened packages of paper ha v e more p otential f or en vironmental d amage, especially if the y ar e not wr apped with a moisture-proof barrier.

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

l Paper should be stored at or near room temperature. l The air should not be too dry or too humid (because of the hygroscopic properties of paper). l The best way to store an opened package of paper is to rewrap it tightly in its moisture-proof

wrapping. If the printer environment is subject to extremes, unwrap only the amount of paper to be used during the day's operation to prevent unwanted moisture changes.

Envelope storage

Proper storage of envelopes contributes to good print quality. Envelopes should be stored flat. If air is trapped in an envelope, and creates an air bub ble, then the envelope might wrinkle during printing.

Testing media specifications

The following tests describe ways to evaluate media with respect to the specifications listed in this manual, and the HP LaserJet Printer Family Print Media Guide. See "Tools and suppliers" on page 39 for help obtaining tools needed to perform these tests.

Basis weight field test

The basis weight should be indicated o n the package label. If the label is not a vailable, a simple field test can determine the basis weight of paper. The basis weight of paper is equal to the weight of 2000 sheets of paper, or four full pac ka ges . Weigh a full package on a post al scale a nd then m ultip ly that weight by four. Or w eigh 10 sheets o f paper, divide that weight by 10, multiply by 2000 , and then divide by 16.

Example 10 sheets weigh 1.6 ounces

0.16 ounce x 2000 = 320 ounces 320 ounces ÷ 16 ounce/lb = 20 lb paper

Table 7. Determining basis weight of paper

Amount Formula

4 packages weight = basis weight 1 package weight x 4 = basis weight 10 sheets (weight divided by 10) x 2000 and then divided by 16 = basis weight

C8519-90912 Media specifications 35

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Metric sizes

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

A4 size sheets. Compare this weight to the appropriate weight in the "Paper weight equivalence table" on page 36.

Paper weight equivalence table

Use this table to determine appro ximate equivalent points in weight specifications other than U.S. bond weight. For example, to determine the equiv alent of 20 lb U.S. bond-weight paper in U.S. cover-weight p aper , lo cate the bond w eight (in ro w 3, second column) and sca n across the row to the cover weight (in the f ourth column). The equiv alent is 28 lb . Shaded areas indicat e a standard weight for that grade.

Table 8. Paper weight equivalence

U.S. postcard thickness (mm)

U.S. bond weight (lb)

U.S. text/ book weight (lb)

U.S. cover weight (lb)

U.S. bristol weight (lb)

U.S. index weight (lb)

U.S. tag weight (lb)

Europe metric weight

(g/m

)

Japan metric weight (g/m

17 43 24 29 35 39 64 64 20 50 28 34 42 46 75 75 21 54 30 36 44 49 22 56 31 38 46 51 81

80 80

81 24 60 33 41 50 55 90 90 27 68 37 45 55 61

100 100 28 70 39 49 58 65 105 105 32 80 44 55 67 74 120 120 34 86 47 58 71 79 128

128

36 90 50 62 75 83 135 135

0.18 39 100 55 67 82 91 148 148

0.19 42 107 58 72 87 97 157

157

0.20 43 110 60 74 90 100 163 163

0.23 47 119 53 134 74 90

65 80 97 108 176 176

110 122 199 199

)

54 137 75 93 113 58 146 65 165

80 98 120 133 216 216

90 111 135 150 244 244 66 169 92 114 138 154 67 171 94 115 70 178 98 72 183

100 123 150 166 271 271

120 146 162 264 264

140 155 253 253

125 203 203

250 250

Note The U.S. postcard measurements are approximate. Use for reference only.

36 Chapter 2 Product requirements C8519-90912

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Caliper field test

The specified caliper differ s according to the type of media used. See "Media specificat ions" on page

31. Caliper can be measured in the field using a micrometer.

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

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

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

Paper finish field test

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

Moisture content field test

Specification: Use paper with 4 percent to 6 percent moisture content. A package or a sheet of paper can be measured with a moisture meter. In general, only evaluate

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

Grain field test

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

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

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

Figure 10. Long, short, and diagonal grain curl

C8519-90912 Media specifications 37

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Curl field test

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

Figure 11. Measuring curl

Cut edge condition field test

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

Furnish (fiber composition) field test

Use paper made from 100 percent chemical wood pulp and/or cotton fiber. Recycled paper made with no more than 5 percent groundwood is also acceptable.

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

Fusing compatibility field test

Inspect the rollers for colored ink b uildu p from preprinted logos or let terhead, and for toner buildup or spots. Inspect printed output for repetitive defects and smearing. If necessary, have users contact the forms vendor to ensure paper fusing compatibility with HP LaserJet printers.

38 Chapter 2 Product requirements C8519-90912

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Tools and suppliers

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

Table 9. Tools and suppliers

Tool Part Number Supplier Address

Paper moisture meter 2RRDMP Mitchell Instrument

Single-sheet clamp probe 2R43E Mitchell Instrument

Temperature/humidity meter #3T331 Industrial Motor Service

Sheffield tester: precisionaire column TM 58-25-01 TMI Testing Machines Inc.

Sheffield tester: smooth check gauge TM 58-25-02 TMI Testing Machines Inc.

Wood pulp test kit 4280-2 Shape Products

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

2000 Albright Montgomery, IL 60538

400 Bayview Avenue Amityville, NY 11701 (516) 842-5400

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

pH test kit 4360-2 Shape Products

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

Resistivity test tool: precision current/resistance meter 278

Resistivity test tool: surface resistivity probe 96117-1

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

C8519-90912 Tools and suppliers 39

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Media input/output options

Trays, bins, and paper handling

The base model printer comes with two built-in 500-sheet trays (tray 2 and tray 3). Optional tray 1 and tray 4 can be adde d to the printer. Special media (envelopes, labels) should only be loaded into optional tray 1. The printer comes with face-up and face-down bins, and an optional 3000-sheet stapler/stacker or 3000-sheet stacker can be installed.

Optional Stapler/stacker or stacker

Tray 2

Tray 3 Optional

tray 4

Figure 12. Media trays, bins, and paper handling

CAUTION Using print media that does not meet HP specifications might cause prob lems fo r the printer, re quiring

repair. Such repair is not covered b y the Hewlett-P ackard warranty or service agreements.

Face-down bin

Optional

tray 1

The HP LaserJet 9000 Series printers accept a variety of media, such as cut-sheet paper (including up to 100 percent recycled fiber-content paper), envelopes, labels, transparencies, and custom-size paper. Properties such as weight, composition, grain, and moisture content are important factors affecting printer performance and output quality. Media that does not meet the guidelines outlined in this manual and in the print media guide can cause the following problems:

l poor print quality l increased jams l premature wear on the printer, requiring repair

40 Chapter 2 Product requirements C8519-90912

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Media sizes

Note Optional tray 1 adju sts for siz es from 98 by 191 mm (3.8 by 7.5 in) to 312 by 470 mm (12.3 by 18.5 in).

Optional tray 1 should be used wh en printing the following: en velopes, labels, and custom-sized media or cardstock.

Table 10. Optional tray 1 media sizes

Optional tray 1 Dimensions Weight Capacity

Plain paper minimum size (custom)

98 by 191 mm (3.8 by 7.5 in)

64 to 216 g/m (17 to 53 lb bond)

100 sheets of 75 g/m (20 lb bond) paper

Plain paper maximum size (custom)

Labels Letter, A4 Maximum height: 10 mm Envelopes

minimum size (custom) Envelopes

maximum size (custom) Transparencies Letter, A4 50 sheets

312 by 470 mm (12.3 by 18.5 in)

98 by 191 mm (3.8 by 7.5 in)

176 by 250 mm (6.9 by 9.8 in)

10 envelopes

Table 11. Tray 2 and tray 3 media sizes

Tray 2 and tray 3 Dimensions Weight Capacity

Letter 216 by 279 mm

(8.5 by 11 in)

A4 210 by 297 mm

(8.3 by 11.7 in)

B4 257 by 364 mm

(10 by 14.3 in)

Ledger 279 by 431.8 mm

(11 by 17 in)

A3 297 by 420 mm

(11.7 by 16.5 in)

Executive 191 by 267 mm

(7.3 by 10.5 in)

64 to 199 g/m (17 to 53 lb bond)

500 sheets of 75 g/m (20 lb bond) paper

Legal 216 by 356 mm

(8.5 by 14 in)

B5 176 by 250 mm

(6.9 by 9.9 in)

A5 148 by 210 mm

(5.8 by 8.2 in)

Plain paper minimum size (custom)

Plain paper maximum size (custom)

C8519-90912 Media sizes 41

148 by 297 mm (5.8 by 11.7 in)

210 by 431.8 mm (8.3 by 17 in)

Page 44

Table 12. Optional tray 4 paper sizes

Tray 4 Dimensions Weight Capacity

Letter 216 by 279 mm

(8.5 by 11 in)

A4 210 by 297 mm

(8.3 by 11.7 in)

B4 257 by 364 mm

(10 by 14.3 in)

Ledger 279 by 431.8 mm

(11 by 17 in)

A3 297 by 420 mm

(11.7 by 16.5 in)

Executive 191 by 267 mm

(7.3 by 10.5 in)

Legal 216 by 356 mm

(8.5 by 14 in)

B5 176 by 250 mm

(6.9 by 9.9 in)

A5 148 by 210 mm

(5.8 by 8.2 in)

Plain paper minimum size (custom)

Plain paper maximum size (custom)

182 by 210 mm (7.2 by 8.3 in)

297 by 431.8 mm (11.7 by 17 in)

64 to 199 g/m (17 to 53 lb bond)

500 sheets of 75 g/m (20 lb bond) paper

42 Chapter 2 Product requirements C8519-90912

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Table 13. Duplexer paper sizes

Duplexer Dimensions Weight

Letter 216 by 279 mm

(8.5 by 11 in)

A4 210 by 297 mm

(8.3 by 11.7 in)

Legal 216 by 356 mm

(8.5 by 14 in)

A3 297 by 420 mm

(11.7 by 16.5 in)

Ledger 279 by 431.8 mm

(11 by 17 in)

B4 257 by 364 mm

(10 by 14.3 in)

Executive 191 by 267 mm

(7.3 by 10.5 in)

B5 176 by 250 mm

(6.9 by 9.9 in)

A5 148 by 210 mm

(5.8 by 8.3 in)

64 to 199 g/m (17 to 53 lb bond)

Plain paper minimum size (custom)

Plain paper maximum size (custom)

148 by 210 mm (5.8 by 8.3 in)

312 by 470 mm (12.3 by 18.5 in)

C8519-90912 Media sizes 43

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Table 14. 3000-sheet stapler/stacker and 3000-sheet stacker medi a sizes

Face-up bin Dimensions Weight

Letter 216 by 279 mm

(8.5 by 11 in)

A4 210 by 297 mm

(8.3 by 11.7 in)

Legal 216 by 356 mm

(8.5 by 14 in)

A3 297 by 420 mm

(11.7 by 16.5 in)

Ledger 279 by 431.8 mm

(11 by 17 in)

B4 257 by 364 mm

(10 by 14.3 in)

Executive 191 by 267 mm

(7.3 by 10.5 in)

B5 176 by 250 mm

(6.9 by 9.9 in)

A5 148 by 210 mm

(5.8 by 8.3 in)

Envelopes minimum size (custom)

Envelopes maximum size (custom)

98 by 191 mm

(3.8 by 7.5 in)

176 by 250 mm

(6.9 by 9.8 in)

64 to 199 g/m (17 to 53 lb bond)

Plain paper minimum size (custom)

Plain paper maximum size (custom)

98 by 191 mm

(3.8 by 7.5 in)

312 by 470 mm

(12.3 by 18.5 in)

Stapler or stacker bin Dimensions Weight

Letter 216 by 279 mm

(8.5 by 11 in)

Ledger 279 by 431.8 mm

(11 by 17 in)

Legal 216 by 356 mm

(8.5 by 14 in)

A5 148 by 210 mm

(5.8 by 8.3 in)

Plain paper minimum size (custom)

Plain paper maximum size (custom)

148 by 210 mm

(5.8 by 8.3 in)

312 by 470 mm

(12.3 by 18.5 in)

64 to 199 g/m (17 to 53 lb bond)

44 Chapter 2 Product requirements C8519-90912

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3 Product configuration

Chapter contents

Using the control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46

Control panel keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46

Numeric keypad commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47

Settings and defaults. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48

Setting the display language. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Setting tray registration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48

Printer driver information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51

Factory default settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Control panel menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54

Using a menu map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Menu map. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55

Retrieve job menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Information menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60

Paper handling menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60

Configure device menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61

Network and mass storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63

Remote firmware upgrade (RFU) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Downloading the new firmware to the printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64

Using HP Web JetAdmin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64

C8519-90912 Chapter contents 45

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Using the control panel

The control panel includes three LED indicator lights, four navigation keys, a help key, a message clear key, a pause/resume key, a can cel job key, a numeric key pad, and a graphical display (capable of displaying up to four lines of text).

The control panel graphical display provides both status and error messages by using distinct text and codes. See "Troubleshooting with control panel messages" in chapter 7.

Graphical display BACK UP SELECT NUMERIC KEYPAD

PAUSE/RESUME

CANCEL JOB

READY DATA ATTENTION HELP CLEAR

Figure 13. Control panel layout

Control panel keys

Table 15. Control panel key functions

Key Function

BACK ARROW)

(

(UP ARROW)

(SELECT)

(CLEAR)

(DOWN ARROW)

(HELP)

CANCEL JOB

PAUSE/RESUME

NUMERIC KEYPAD

DOWN

l Backs up one step from a selection or a 10-key entry. l Navigates to the previous item in the list. l Saves the selected value fo r that item. An asterisk ( * ) appears next to the

selection, indicating that it is the new default. Default settings remain when the printer is switched off or is reset (unless you reset all factory defaults from the Resets menu).

l Prints one of the printer information pages from the control panel. l Returns a numeric entry to its previous value.

l Navigates to the next item in the list. l Gets help on the message currently displayed.

Cancels the current print job. The time it takes to cancel depends on the size of

the print job. (Press it only once.) Returns to the ready or busy state from menus or online help.

l Toggles between pause and resume.

Enters numeric values.

46 Chapter 3 Product configuration C8519-90912

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Numeric keypad commands

The NUMERIC KEYPAD is used to enter a numeric value. The NUMERIC KEYPAD will also provide a shortcut key to items in the menus if the device is in an idle state. Pressing the numbers that correspond with the position of the menu item will enter that menu. For example, to get a configuration page, the user w ould press 22. The first 2 is th e Inf ormation Menu, which is the second menu. The second 2 is the “PRINT CONFIGURATION PAGE” command and is the second item in the list. The menus can change dynamically. The configure device menu has flexible menus to configure accessories depending on what accessories are av ailab le, so t he number se quence might not be the same for all de vices. Pressing a number should be the same as na vig ating to that item in the list and pressing .

The exception to this is when the display is showing a list of v alues . In th is case , entering the n umber moves to that item in t he li st but does not select the item. This is the same for continuous values t hat can be entered by using the N presses the number desired and then presses .

The table below outlines the effect of a number k ey on certain printer states.

Table 16. Printer state and numeric key effect

UMERIC KEYPAD. For example, to enter the number of copies, the user

PowerSave Idle/pause Continuable

error

Exit the PowerSave mode

Used to enter menus. Each menu has an assigned number.

No effect. No effect. No effect. Enters the

Data Processing

job

In menus In online

information

No effect.

numeric value.

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Settings and defaults

The printer makes most printing decisions based on temporary settings or on factory (permanent) defaults.

Note Settings you send from soft ware applications override printer defaults.

Temporary settings are the values set through your software application for the current print job. Temporary settings remain in effect until the current print job is finished.

Control panel defaults are the values entered by selecting a control panel item and pressing . An asterisk ( * ) next to the item name indicates that it is now the default. The printer retains default settings even when power is turned off.

Factory defaults are prese t at the factory and are the permanent default v alues for each menu item. Factory default values are listed in table 17.

Setting the display language

Method 1

1 Press to enter the menus. 2 Press or to scroll to CONFIGURE DEVICE, and then press . 3 Press or to scroll to SYSTEM SETUP, and then . 4 Press or to scroll to LANGUAGE, and then . 5 Press or to scroll to the desired language, and then .

Method 2

1 Press and hold while turning on the device. 2 Hold until all three error lights are illuminated at the same time. 3 Press or to scroll to the desired language, and then .

Note For Japanese, Turkish, Czech, Russian, Hungarian, and Polish, language selection will change the

default symbol set for the specific language. For all other languages, the default symbol set is PC-8.

Setting tray registration

1 Press to enter the menus.1 2 Press or to scroll to CONFIGURE DEVICE, and then press . 3 Press or to scroll to PRINT QUALITY, and then press . 4 Press or to scroll to SET REGISTRATION, and then . 5 Press or to scroll to PRINT TEST PAGE, and then . 6 A registration page will print. See figure 14 for a sample registration page. Follo w the instructions

on the page to complete the registr ation setting.

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Figure 14.

Registration page (1 of 2)

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Figure 15. Registration page (2 of 2)

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Printer driver information

When you change a setting fro m the printer control panel, the new setting becomes the printer default value. You can override any control panel setting through most software applications, as well as from the printer driver.

Factory default settings

The following tables detail the default values for each menu item grouped by menu. Performing a Cold Reset or NVRAM INIT will restore the printer to these factory settings. See "Service mode" in chapter 7.

Table 17. Factory default settings

Menu item Default value

Paper handling menu Tray 1 mo de First Tray 1 size Any

Note

Not visible if tray 1 mode = first

Tray 1 type Plain

Note

Not visible if tray 1 mode = first

Tray 2 size Cold reset paper size Tray 2 type Plain Tray 3 size Cold reset paper size Tray 3 type Plain Tray 4 size Cold reset paper size Tray 4 type Plain

Paper handling menu—fuser modes Plain Auto Preprinted Auto Letterhead Auto Transparency Auto Prepunched Auto Labels Auto Bond Auto Recycled Auto Color A uto Cardstock Auto Rough Auto User-type 1 Auto User-type 2 Auto User-type 3 Auto User-type 4 Auto

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Table 17. Factory default settings (continued)

User-type 5 Auto

Printing menu Copies 1 Default paper size Letter Default custom paper size X = 265 mm

Y = 216 mm Paper destination Standard output Duplex Off Binding Long edge Override A4 with letter No Manual feed Off Edge-to-edge override Off Courier font Regular Wide A4 No Print PS errors Off

Printing menu—PCL Form length 60 Orientation Portrait Font source Internal Font number 0 Font pitch 10.00 Font point size 12.00 Symbol set PC-8 Append CR to LF No

Print quality

Print quality—Set registration Source Tray 2 Adjust tray 1 (If present) X 1 shift 0 X 2 shift 0 Y shift 0 Adjust tray 2 X 1 shift 0 X 2 shift 0 Y shift 0 Adjust tray 3 X 1 shift 0 X 2 shift 0 Y shift 0 Adjust tray 4 (If present) X 1 shift 0

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Table 17. Factory default settings (continued)

X 2 shift 0 Y shift 0 Resolution FastRes 1200 RET Medium EconoMode Off Toner density 3 Small paper mode Normal

System setup Job storage limit 32 Job hold time-out Off PowerSave time 1 hour Personality Auto Clearable warnings Job Auto continue On Cartridge low Continue Jam recovery Auto RAM disk Auto Language English

I/O I/O time-out 270 I/O buffer Auto

I/O—Parallel inputs High speed Yes Advanced On Infrared inputs

Diagnostics

Diagnostics—Set paper path test Source Tray 1 Destination Standard output Duplex Off Copies 1

Service Total page count 0000000 Maintenance count 0 Maintenance interval 350000 Serial number Cold reset paper Depends on the country

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Control panel menus

Press or to cycle through the control panel menus. Each menu is described in a separate table in this section. Figure 16, "Menu map page 1 (common functions)" on page 55 pro vides a map of all the menus and their associated items. Menu items are displayed only if their associated option is installed, or their function is activated.

All menus and their associated items are accessib le when the printer is online. In menu mode, if no keys are pressed f or approximately 30 seconds, the system will automatically return to the top level and display either an existing error, or one of the following:

l READY, if the printer was online. l OFFLINE, if the printer was offline.

Note Shaded items appear only when the associated option or function is installed and activated. Printer

driver and software commands override the printer control panel settings. From the control panel, you can print a menu map that shows the current printer configuration. See

"Menu map" on page 55. Additional menu items can appear in the control panel, depending on the options currently installed in the printer. The following is a list of menus available from the control panel.

l "Retrieve job menu" on page 60. l "Information menu" on page 60. l "Paper handling menu" on page 60. l "Configure device menu" on page 61.

Using a menu map

To see the current settings for the menus and items available in the control panel, print a control panel menu map . Values that appear with an ( * ) next to them are the curren tly selected v a lues for a setting. Many of these values can be overridden from the print driver or a user program. You might want to store the menu map near the printer for reference.

The contents of the menu map v aries, depending on the optional accessories currently installed in the printer. For a complete list of accessories or to change a control panel item and possible values, see "Control panel menus" on page 54.

Select an item from the menu map

Press . Press Press

or to scroll to the required menu, and then press . or to scroll to the page desired, and then press .

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Menu map

Figure 16. Menu map page 1 (common functions)

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Figure 17. Menu map page 2 (common functions)

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Figure 18.

Menu map page 3 (administrative functions)

Figure 19. Menu map page 4 (administrative functions)

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Figure 20. Menu map page 5 (administrative functions)

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Figure 21.

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Menu map page 6, Control panel instructions

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Retrieve job menu

This menu contains stored job information.

Table 18. Retrieve job menu

Item Explanation

NO STORED JOBS

This menu gives a listing of currently stored print jobs.

Information menu

This menu contains printer inf ormation pages that g iv e deta ils about t he printer and its co nfigur ation.

Table 19. Information menu

Item Explanation

PRINT MENU MAP

PRINT CONFIGURATION

PRINT SUPPLIES PAGE

PRINT USAGE PAGE

PRINT FILE DIRECTORY

PRINT PCL FONT LIST

The menu map shows the layout and current settings of the control panel menu item. See "Menu map" on page 55.

The configuration page shows the current printer configuration. If an HP Jetdirect print server card is installed, a Jetdirect configuration page will print out as well. See "Configuration page" in chapter 7.

The print supplies page shows the number of pages remaining for the print cartridge and maintenance kit. Percent remaining as well as pages remaining for all consumables are shown on this page.

Contains information that can be used for cost analysis and accounting. This item appears only when a mass storage device (such as an optional flash DIMM

or hard disk) containing a recognized file system is installed in the printer. The file directory shows information for all installed mass storage devices. See "File directory page" in chapter 7.

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

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

PS FONT LIST

Paper handling menu

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

Some items in this menu (such as duplex and manual feed) can be accessed from a software application or from the printer driver (if the appropriate driv er is install ed). Printer drive r and softw ar e application settings override control panel settings.

Table 20. Paper handling menu

Item Values Explanation

TRAY 1 MODE= FIRST

TRAY 2 SIZE= LETTER

TRAY 2 TYPE= PLAIN

ANY

LETTER

PLAIN

If TRAY 1 MODE=ANY and paper is loaded in optional tray 1, the printer will pull paper from that tray first. Set the value to correspond with the paper size currently loaded in optional tray

1. Set the value to correspond with the paper size currently

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

loaded in tray 2.

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Table 20. Paper handling menu (continued)

Item Values Explanation

TRAY 3 SIZE=

LETTER

TRAY 3 TYPE=

PLAIN

TRAY 4 SIZE=

LETTER

TRAY 4 TYPE=

PLAIN

FUSER MODES PLAIN

PREPRINTED LETTERHEAD TRANSPARENCY PREPUNCHED LABELS BOND RECYCLED COLOR CARDSTOCK ROUGH

CONFIGURE EDGE TO EDGE=NO

NO YES

Set the value to correspond with the paper size currently loaded in tray 3.

Set the value to correspond with the paper type currently loaded in tray 3.

Set the value to correspond with the paper size currently loaded in tray 4.

Set the value to correspond with the paper type currently loaded in tray 4.

Configure the fuser mode associated with each paper type. The fuser mode can be changed only from this menu option in the control panel.

Configure the margin alignment for the tray you wish to print an edge-to-edge print job from. NO: The edge-to-edge configuration menu items are not accessible. YES: Additional edge-to-edge configuration menu items appear.

Configure device menu

It is possible to gain access to some items in this menu either f rom a soft wa re application or f rom the printer driver (if the appropriate driver is installe d). Printer driver and software application settings override control panel settings.

Table 21. Configure devi ce menu

Item Values Explanation

PRINTING COPIES

DEFAULT PAPER

SIZE

DEFAULT CUSTOM

PAPER SIZE

PAPER

DESTINATION DUPLEX OVERRIDE

A4/LETTER MANUAL FEED EDGE-TO-EDGE COURIER FONT WIDE A4 PRINT PS ERRORS PCL

Set the default number of copies, standard and custom paper sizes, output destination, and the default overrides for A4/letter, edge-to-edge, and manual feed.

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Table 21. Configure device menu (continued)

Item Values Explanation

PRINT QUALITY SE T

REGISTRATION RESOLUTION R E T ECONOMODE TONER DENSITY SMALL PAPER

MODE CREATE CLEANING

PAGE

SYSTEM SETUP

JOB STORAGE

LIMIT JOB HELD

TIMEOUT POWERSAVE TIME PERSONALITY CLEARABLE

WARNINGS AUTO CONTINUE CARTRIDGE LOW JAM RECOVERY RAM DISK NULL STRING

I/O I/O TIMEOUT

EIO 1

Set the paper registration and print quality from this menu. Create a printer cleaning page and set EconoMode in the menu.

This menu is used to set time and quantities for warnings and limits.

This menu is used to set timings for the EIO slots.

DIAGNOSTICS PRINT EVENT

LOG SHOW EVENT LOG SET PAPER PATH

TEST SERVICE TEST

RESETS RE STORE

FACTORY

SETTINGS POWERSAVE

This menu is used for printer and accessory diagnostics. A service test can be performed from this menu.

Factory defa ults a r e re sto re d f rom this menu.

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Network and mass storage

Hewlett-Packard frequently introduces new software tools for use with your printer and accessories. Many of these tools are available from the Internet free of charge. See "World Wide Web" in chapter 1 for information about how to visit the HP website for more information.

To install EIO cards and hard disks (mass storage)

l Turn off the printer and remove the power cord before installing the EIO cards or mass storage

device.

l Use the graphic in figure 22 for the location of the EIO cards or optional mass storage device,

such as a hard disk.

l Use HP Resource Manager to manage fonts on a mass storage device.

EIO 3

EIO 2

EIO 1

Figure 22. EIO slots

Note Af t e r yo u h av e i n st a l l e d a n ew d ev i c e , pr int a configuration page to verify installation.

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Remote firmware upgrade (RFU)

The process for upgr ading printer firmware remotely involves three st eps:

1 Determine the current level of firmware installed on the printer. 2 Go to the http://www.hp.com/go/lj9000_firmware Web site and download the latest firmware. 3 Download the new firmware to the printer.

Downloading the new firmware to the printer

You can send an RFU upgrade to a printer at any time; the printer will wait for all input/output channels to become idle before turning power off and back on.

Note If the firmware upgrade involves a change in the format of NVRAM, the NVRAM settings will be lost

and must be set again by the customer.

Windows systems

Note Some Windows systems may require the follo wing command to be e x ecuted at the command prompt

if the system receives a "time out" error during the printer upgrade process: "mode lpt1:,,p". If the printer is shared on the network, then the following command can be issued from a command

prompt: copy /b FILENAME \\SHARENAME\PRINTERNAME where FILENAMEis the name of the RFU file, SHARENAME is the name of the computer from which

the printer is being shared, and PRINTERNAME is the printer share name. If the printer is connected locally, then the RFU file can be sent directly to the printer with a COPY

command from a command prompt or MS-DOS window: copy /b FILENAME PROTNAME where FILENAMEis the name of the RFU file, and PORTNAME is the name of the appropriate

printer port (such as LPT 1). You can also send the file through a FIR port.

UNIX systems

Any method that delivers the RFU file to the printer will work, including: $ cp /home/yourmachine/FILENAME /dev/parallel where /home/yourmachine/FILENAME contains the RFU file.

Using HP Web JetAdmin

This procedure requires that W eb JetAdmin version 6.1 or later be installed. Complete the following steps to upgrade a single printer through Web JetAdmin after downloading the RFU file from the HP Web site.

1 Start HP Web JetAdmin. 2 Enter the internet protocol (IP) address or IP hostname of the printer in the Quick Device Find

field, and then click Go. The printer Status window appears.

3 Click the right arrow on the toolbar to display the Update button. 4 Click Update.

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When prompted for the type of update to perform, click Update Printers, and then click Continue.

6 Under Upload new firmware image:, click Browse to locate the RFU file you downloaded from

the http://www.hp.com/go/lj9000_firmware Web site.

7 Click Upload to move the RFU file from your hard drive to the HP Web JetAdmin server. 8 Refresh the browser. 9 Select the RFU file from the Select new firmware version: drop-down menu. 10 Click Update Firmware. HP Web JetAdmin sends the selected RFU file to the printer.

Also, HP Web JetAdmin 6.1 can be used to perform multiple or unattended installations:

1 Start HP Web JetAdmin. 2 Create a device group. A simple way to do this is to:

a. Click Devices on the 1. Choose: drop-down menu. b. Click Device Model from the 2. Filter: drop-down menu. c. Type iy9000lw in the 3. Criteria (Optional): field. d. Click Go.

3 In the Device List, select the printers you want to include in the group and click Create Group. 4 When prom pt ed , typ e a na m e for the new device group, and then click OK. 5 Click Update. 6 When prompted for the type of update to perform, click Update Printers, and then click

Continue.

7 From the list of HP Devices, select the printers to be upgraded, or click Select All. 8 Click Update to install the new printer firmware.

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4 Product maintenance

Chapter contents

Preventative maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68

Preventive maintenance kit contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68

Cleaning the printer and accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69

General cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Internal cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70

Fuser cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73

Print cartridge information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75

Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75

Handling instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75

Refilled print cartridges. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76

Print cartridge weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76

Print cartridge life expectancy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76

Saving toner with EconoMode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

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Preventative maintenance

To ensure optimum print quality, the printer will prompt you to perform printer maintenance every 350,000 pages. When the PERFORM PRINTER MAINTENANCE message appears on the control panel, the customer needs to purchase and install a preventive maintenance kit . After a new maintenance kit is installed, the control panel displays NEW MAINTENANCE KIT and NO is highlighted. Use or to scroll to YES and press . Print a configuration page to verify that the maintenance kit is reset to zero.

Note The preventive maintenance kit is a consumable, and is not covered under warranty.

For more information about installing a preventive maintenance kit, see the installation guide that accompanies it.

Preventive maintenance kit contents

The prev entive maintenance kit, P/N C9152A (110 V), or C9153A (220 V), should be replaced after each 350,000 pages of use. The following parts are included in the preventive maintenance kit:

l fuser assembly (1 assembly) l transfer roller assembly (1 assembly) l feed rollers (tray 2 and tray 3) (4 rollers) l pickup rollers (tray 2 and tray 3) (2 rollers) l 2000-sheet feeder tray rollers (3 rollers)

Variables such as media, environment, and usage can cause premature wear of these parts. See "Media specifications" in chapter 2 or the HP LaserJet Printer Family Print Media Guide for information about suitab le media, environment, and usage conditions.

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Cleaning the printer and accessories

To maintain superior print quality and performance, use the following procedures to clean the printer and the paper-handling accessories thoroughly every time you change the print cartridge or whenever print-quality problems occur.

General cleaning

WARNING! In order to av oid shoc k hazard, turn the printer and the paper- handling accessories off and unplu g all

power cords before you begin these steps.

CAUTION Do not use ammonia-based cleaners on or around the products. While clea ning the printer , be careful

not to touch the transf er roller (located underneath the print cartridge). Skin oils on the roller can cause print-quality problems.

To prevent damage, do not expose the print cartridge to direct light. Place a piece of paper over the top of the print cartridge to shield it while it is out of the printer.

l Clean the outside of the products with a water-dampened cloth. l Clean the inside of the products with a dry, lint-free cloth.

Cleaning spilled toner

Defective print cartridges can develop leaks. After a 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.

Note T o clean skin and clothing of toner spills , remove as much toner as possib le with dry tissue, then wash

with cold water. Hot water causes toner to permanently set into clothing.

Vacuum specifications

Do not vacuum the printer or any spilled toner using a conventional vacuum. Toner particles used in this product might be too fine f or ef fective va cuuming an d could re sult in damage to the conventional vacuum cleaner.

A vacuum cleaner specifically designed for cleaning toner can be used if it is capable of filtering fine particles (5 microns in diameter).

Dispose of waste toner in accordance with local requirements. Do not discharge toner particles in drains.

First aid measures

l Ingestion—If toner is ingested, rinse mouth thoroughly with water and drink several glasses of

water. If irritation occurs, consult a physician.

l Inhalation—If toner particles are inhaled, move to fresh air immediately. If irritation occurs,

consult a physician.

l Eye contact—If toner comes in contact with the eyes, immediately flush with plenty of water for

at least 15 minutes. If irritation occurs, consult a physician.

l Skin contact—If toner spills on skin, remove as much toner as possible using dry tissue (more

than one may be needed), and then w ash the aff ected area of the ski n with cold wat er . If irritation occurs, consult a physician.

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Internal cleaning

During the printing process, paper, toner, and dust particles can accumulate inside the printer and the paper-handling accessories. Over time, this buildup can cause print-quality problems such as toner specks or smearing. Internal cleaning can assist in correction and prevention of these types of problems.

CAUTION Before you begin these steps, turn the printer off and unplug all power cords to avoid shock hazard.

1 Turn the printer off and unplug all power cords.

Figure 23. Remove power cord

CAUTION To prevent damage to the print cartridge, use two hands when removing it from the printer.

2 Open the front cover, turn the green lev er counter clockwise to the unlocked position, and

remove the print cartr idg e.

Figure 24. Remove print cartridge

CAUTION T o prev ent damage, do not e xpose the print cartridge to light; place a piece of paper on top of the print

cartridge.

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With a dry, lint-free cloth, wipe any residue from the paper-path area, registration roller, and the print cartr idge cavity.

Figure 25. Wipe residue

4 Replace the print cartridge.

Figure 26. Replace print cartridge

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5 Press the button on the green lev er, then turn the lever clockwise to the locked position.

Figure 27. Lock print cartridge

6 Close the front cover. Plug in the power cable , and turn the printer on.

Figure 28. Close front cover

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Fuser cleaning

To complete internal cleaning, create and process a cleaning page.

Create a cleaning page

Generating a cleaning page will clean the excess toner off the pressure roller in the fuser. The page has instructions printed on it that will walk the user through the process of inserting the page in a tray. If an optional tray 1 is installed, the instructions will indicate that the page should be placed face down in tray 1. If an optional tray 1 is not installed, the instructions will indicate that the page be placed face up in tray 2. The user is then instructed to select the PROCESS CLEANING PAGE on the control panel. A sample cleaning page is shown below. While the cleaning page is printing, the display will show CREATING CLEANING PAGE.

Note For best results, use copier-grade paper with a smooth surface and a weight of 64 to 90 g/m

(17 to 24 lb); do not use bond or rough paper.

Create/print a cleaning page

1 Press . 2 Press or to scroll to CONFIGURE DEVICE menu and press . 3 Press or to scroll to PRINT QUALITY an d pr es s . 4 Press or to scroll to CREATE CLEANING PAGE and press . 5 A cleaning page will print.

Figure 29. Sample cleaning page

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Process a cleaning page

Follow the instructions on the cleaning page to complete the cleaning process. PROCESS CLEANING PAGE will only be visible to the user after they have generated a cleaning page

using the CREATE CLEANING PAGE menu. Once the user has generated the page and placed it face down in tray 1, or face up in tr a y 2, the user will be instructed to select this menu item to complete the cleaning process. The de vice m ust chec k t o mak e sure that lett er or A4 pape r is loaded with t he long edge fed first. Once the user has completed these steps, this menu item will not be visible until another cleaning page has been created. While the cleaning page is being processed the display will show CLEANING.

Note When toner has been cleaned from inside the printer, shiny b lac k spots will appear on the b lac k strip.

If white spots appear on the black strip, print another cleaning page.

Note To ensure good print quality with certain types of paper, use the cleaning page every time the print

cartridge is replaced. If the cleaning page is frequently needed, try a different type of paper.

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Print cartridge information

Print cartridges contain components that are sensitive to light, temper ature , and humid ity. Make sure the user follows the recom mendations in this section to ensure the highest quality and longest life of the print cartridge.

Storage

The print cartridge (C8543X) should not be removed from its package un til insta llat ion . The shel f life of a cartridge in an unopened package is approximately 2.5 years. The shelf life of a cartridge in an opened package is approximately 6 months. The expiration date of the print cartridge is stamped on the cartridge box.

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

Table 22. Storing print cartridges

Category Temperature Humidity

Operating 10 degrees to 32.5 degrees C

(50 degrees to 90.5 degrees F)

Storage 0 degrees to 35 degrees C

(32 degrees to 95 degrees F)

20 percent to 80 percent RH

35 percent to 85 percent RH

If the print car t ridge must be removed from the printer, always store the cartridge:

l inside the protective bag in which it was originally packaged.

Note If original package is not available, cover the top opening of the print cartridge with paper.

l in a dark cabinet, away from direct sunlight. l correct side up and in a horizontal position (not standing on end). l in a temperature listed in the table above. l away from ammonia or other organic solvent fumes.

CAUTION Never ship the printer with a print cartridge installed. Excessive vibr ation during shipping can cause

toner to leak, contaminating the printer. Never e xp ose the print cartridge to direct sunlight, or to room light . Bright light and direct sun light can

permanently damage a print cartridge.

Handling instructions

l Do not touch the surface of the photosensitive drum in the cartridge. Protect the drum from light

and contamination.

l Do not expose the cartridge to unnecessary vibrations or shock. l Do not expose the photosensitive drum to strong light. Blurred areas on the page might indicate

that the drum has been exposed to light for too long. This causes permanent damage to the photosensitive drum. If this occurs, replace the cartridge.

l Never manu ally rotate the drum, especially in the re v erse direction; it can cause internal damage

and toner spills.

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Refilled print cartridges

HP policy about non-HP print cartridges

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

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

l Hewlett-Packard has no ability to ensure that a refilled print cartridge functions at the high level

or reliability of a new HP print cartridge. Hewlett-Packard also cannot predict the long-term effect of the various toner formulations found in refilled cartridges.

l Hewlett-Pa c kard has no control o ver the print quality of a refilled print cartridge. The print quality

of HP print cartridges influences customer perception of the printer.

l Repairs resulting from the use of refilled print cartridges will not be covered under the HP

warranty or maintenance contract.

l Smart cartridge features (cartridge out/low) are not available.

Print cartridge weights

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

l full: 4220 grams (9.28 lb) l empty: 2700 grams (5.94 lb)

Print cartridge life expectancy

The life of the print cartridge depends on the amount of toner used in each print job. When printing text at 5 percent coverage, an HP LaserJet 9000 print cartridge lasts an average of 30,000 images. This life expectancy is estimated with the default print density setting, and EconoMode off (default settings).

Saving toner with EconoMode

HP LaserJet 9000 print cartridge usage can be extended by using the printer EconoMode feature. EconoMode can be turned on or off through the driver or through HP LaserJet device configuration.

l Some software applications might refer to EconoMode as “draft mode.” l EconoMode is only available if a genuine HP print cartridge is installed.

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5 Theory of operation

Chapter contents

Basic operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .79

Sequence of operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80

Power-on sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82

Timing chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83

Engine control system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

DC controller PCB. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .85

DC controller operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .86

High-voltage power supply circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .87

Low-voltage power supply unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .89

Formatter system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

Formatter hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90

Formatter subsystem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .91

Laser/scanner system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92

Image formation system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

The eight processes of image formation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

Print cartridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .94

Pickup and feed system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .96

Media-size detection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .96

Media-level detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .96

Multifeed prevention . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .96

Overhead transparency detection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

Fuser wrapping jam detection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

Jam detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .97

Optional tray 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

Tray 1 driver PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .102

Power supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .102

Sequence of operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

Pickup and feed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .103

Jam detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .103

Optional tray 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

Tray 4 driver PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .104

Power supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .104

Sequence of operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

Pickup and feed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .105

Media level and size detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

Jam detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .105

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Optional 3000-sheet stapler/stacker. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

Controller PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

Power-on sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

Main modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

Paper path and jam detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

Stapler bin full condition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

Optional 3000-sheet stacker. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

Controller PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

Power-on sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

Main modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

Paper path and jam detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

Stacker bin full condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

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Basic operation

This chapter provides information about the following systems:

l engine control l formatter l laser/scanner l image formation l pickup and feed

Relationships among the five systems ar e represented in figure 30 below:

Figure 30. Printer systems

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Sequence of operation

Operational sequences are controlled by the engine control system. Table 23 describes the sequences.

Figure 31. Sequence of operation block diagram

Table 23. Normal sequence of operation

State Period Operation

WAIT From the time the power is

switched on until the surface temperature of the fuser and pressure rollers reach their WAIT target value (f our minutes or less.)

STBY (standby)

From the end of the WAIT period to the input of a print reservation command from the formatter.

-orFrom the end of the LSTR period until either a print reservation command is input from the formatter or until power is switched off.

l power on, CPU, and ASIC initialize l fan rotation (fans 1-6 for 30 seconds, duplexer fan for 3

seconds)

l formatter interface communication starts l fuser heaters turn on l cartridge check l cartridge memory check for toner level l optional interface communication (duplexer, tray 1, tray 4,

paper handling)

l cassette checks (lifting and paper installed) l jam check (auto flush/eject) l fuser wrapping jam detect l door open/sleep check l fuser roller temperature control and delivery motor

l fuser control (fuser roller temperature—180 degrees C (356

degrees F)/pressure roller 140 degrees C (285 degrees F))

l print reservation command (awaits INTR sequence) l fan motor drive control (fans 1-5 half speed rotation; fan 6 is

off)

l fuser roller deformation prevention (fuser/delivery motor

rotates every hour for >8 seconds to prevent deforming the roller)

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Table 23. Normal sequence of operation (continued)

State Period Operation

INTR (initial rotation)

From the input of a print reservation command from the formatter until the laser/scanner enters a ready state.

PRINT From the input of a print

command until the primary DC bias is turned off.

LSTR (last rotation)

From the time the primary charging roller is turned off until each of the motors stop.

l scanner motor rotation l fuser/delivery motor rotation l drum motor rotation l high-voltage control (negative bias to transfer roller) l receives print command l fan motor 1-6 full speed rotation l pickup operation starts l high-voltage control bias applied to primary charging roller,

developing roller, and transfer roller)

l fuser control (fuser roller to 190 degrees C (374 degrees F),

pressure roller 180 degrees C (356 degrees F))

l initial rotation final check (high-voltage, scanner motor, pickup

operation complete)

l jam/door open/failure/sleep check l fuser/delivery, drum, scanner, and fan motor rotations

l fuser control (print temperature—fuser 190 degrees C (374

degrees F))

l engine to formatter output signal l formatter to engine input signal l paper feed control l image control l high-voltage control (toner level-output separation bias and

pressure roller bias)

l next pickup control (calculates from paper size the speed to

send paper through)

l jam/door open/failure l fuser/delivery, drum, scanner, and fan motor rotations

l high-voltage control completion l fuser control (print to standby temperature—180 degrees c

(356 degrees f))

l fan motor control (fan 1-6 full speed rotation) l fuser/delivery, drum, and scanner motor stop (writes in

cartridge memory)

l jam/door open/failure check l ready for next pickup

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Table 24. Failure sequence of operation

State Period Operation

JAM From the time the power is

switched on until the end of the LSTR period.

DOOR OPEN

F AILURE From the time the power is

SLEEP From the time the power is

From the time the power is switched on until the end of the LSTR period.

switched on until the end of the LSTR period.

l sensor check l drive stop (scanner motor, high-voltage, fuser control, and

fuser/delivery motor stop)

l status setting (jam status set) l door open check

l drive stop l status setting l door close (wait sequence)

l drive stop l status setting (set)

l drive stop (scanner motor, high-voltage control, fuser control,

fuser/delivery motor, 24 v stop, 3.3 v sets PowerSave mode, fan motor stop)

l status setting l door open check

Power-on sequence

The sequence from the time the po wer is turned on until the printer ente rs the standb y state is sho wn below:

1 Power is turned on. 2 CPU and ASIC initialization. 3 Video interface communication start (formatter). 4 All fans are turned on. 5 Fuser and pressure roller heaters are turned on. 6 Cartridge presence check. 7 Cartridge memory check. 8 Initialization of optional accessories, if installed. 9 Pickup roller motor and cassette lifter motors are turned on. 10 Pickup roller motor and cassette lifter motors are turned off. 11 Fuser motor, drum motor, and transfer negative bias are turned on. 12 Pressure bias and jam detection lever drive solenoid (SL501) are turned on. 13 Developing AC bias is turned on (toner level det ection). 14 Fuser reaches its target temperature. 15 Fuser motor, drum motor, transfer negativ e bias, pressure bias, and SL501 are tu rned off. 16 Standby.

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Timing chart

Figure 32. Timing diagram

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Engine control system

The engine control system coordinates the laser/ scanner, image formation, and pickup and feed systems according to the instructions it receives from the formatter. The engine control system consists of the DC controller PCB, the high-voltage power supply circuit, and the low-voltage power supply unit.

Figure 33 shows a block diagram of the engine control system.

Figure 33. Engine control system block diagram

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DC controller PCB

The DC controller circuit controls operational sequences of the printer.

Figure 34. DC controller circuit block diagram

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DC controller operations

l The CPU (IC201) on the DC controller PCB controls the following printer operations:

• sequence of the printer

• communications with the formatter

• high-voltage power supply circuit

• rotation of the pickup motor, lifter motor, pickup roller motor, and fan motor 6

• communication with the duplexer and the optional tray 1, if installed

• fuser heater control circuit and fuser heater safety circuit

l ASIC (IC202) on the DC controller PCB controls the following printer operations, according to

instructions from the CPU:

• laser/scanner

• rotation of fuser/delivery motor and drum motor

• sensors and switches

• clutches and solenoids

• rotation of fan motors 1 through 5

l Reset IC (IC203) monitors +3.3 V and resets the CPU and ASIC at power on. l EEPROM (IC204) stores backup data. l Pickup motor driver IC (IC205) drives the pickup motor. l Pickup roller up and down motor driver IC (IC206) drives the pickup roller up and down motor. l Lifter motor driver IC (IC207) drives the lifter motor. l Fan motor control circuit turns fans on and off.

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High-voltage power supply circuit

The high-voltage power supply circuit applies a high-voltage bias to the primary charging roller, the developing cylinder, the pre-transfer upper guide, the transfer charging roller , the separation static charge eliminator, and the pressure roller through the ASIC (IC 202), according to instructions it receives from the CPU (IC201) on the DC contro ller PCB . The high-voltage power supply circuit also detects the toner level.

Figure 35. High-voltage power supply block diagram

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Each of the bias generation circuits has a specific purpose:

l Primary charging bias generation. Applies bias to the primary charging roller to spread a

uniform, negative charge on the photosensitive drum.

l Developing bias genera tion. Controls the amount of toner transferred onto latent images

formed on the photosensitive drum.

l Pre-transfer upper guide bias generation. Preven ts toner on the photosensitive drum from

adhering to the pre-transfer upper guide.

l T ransf er bias generation. Each of the t hree types of transf e r bias (cleaning bias , betwe en-page

bias, and print bias), is applied to the transfer charging roller at specified intervals:

l Cleaning bias. Cleans the transfer charging roller by moving toner to the photosensitive drum. l Between-page bias. Prevents residual toner on the photosensitive drum from adhering to the

transfer charging roller between pages of a multi-page print job.

l Print bias. Transfers toner from the photosensitive drum to the print media. l Separation static charge eliminating bias. Stabilizes media delivery. l Pressure roller bias generation. Prevents toner from adhering to the fuser rolle r. l Toner level detection. Monitors toner level through two antennae (plate antenna and flat

antenna) in the toner cartridge.

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Low-voltage power supply unit

The low-voltage power supply unit consists of the fuser control circuit and the low-voltage power supply circuit.

Figure 36. Power supply block diagram

Fuser control circuit

Three heaters heat the fuser roller and pressure roller. The main heater (H1) heats the center of the fuser roller; the sub-heater (H2) heats both ends of the fuser roller; and the lower heater (H3) heats the pressure roller.

Two thermistors monitor the surface temperatur e of the rollers. The upper th ermistor (TH1) monitors the fuser roller surface tempe rature and the lower thermistor (TH2) monitors the pressure roller surface temperature.

Two thermal switches guard against overheating the three heaters by turning off power to the heaters when the temperature rises abnormally.

The printer is designed to prev ent flick er. Lights attached to the same A C pow er source as the printer can flicker as a result of high-frequency noise. To control flicker, the printer gradually increases and decreases power to the heaters when they are turned on and off.

Low-voltage power supply circuit

The low-voltage po wer supply circuit con v erts AC v oltage f rom the p ow er source to DC v olta ge when the printer is turned on. The AC power is converted as follows:

l +24VDC for motors, so lenoids, clutches, and the high-voltage power supply circuit l +5VDC for the laser/scanner PCB, th e BD PCB, and the formatter l +3.3VCD for the formatter, sensors, and the ICs on the DC controller PCB

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Formatter system

The formatter and DC controller exchange signals that allow the DC controller to begin the initial rotation period (INTR), turn on the registration roller drive clutch, and feed media into the printer. When media is positioned for printing, the formatter sends information through the DC co ntroller to the laser/scanner, which then turns the laser diodes on and off. Laser beams emitted from the laser diodes are reflected by the laser/scanner mirror, scanning across the photosensitive drum to form a latent image on the drum.

The formatter system is responsible for the following:

l receiving and processing data from the various printer interfaces l monitoring control panel input and relaying printer status information (through the control panel

and the I/O)

l developing and coordinating data placement and timing with the print engine l storing font information and macros l communicating with the host computer

The formatter receive s data fr om the I/O and con v erts it into a dot image . The formatter then sends a print signal to the engine controller assembly. The engine controller assembly synchronizes the image-formation system with the paper-feed system, and signals the formatter to send the printimage data. The formatter sends the print-image data (dots) in the form of a video signal, and the printing process begins.

Formatter hardware

The formatter system includes the following:

l ROM—Stores the dot patterns of internal character sets (fonts), in addition to storing

microprocessor control programs.

l RAM—Stores printing and font information receiv ed fro m the host system, and can also serve to

temporarily store a full page of print-image data before the data is sent to the print engine. Increasing the RAM will increase graphic intense printing operations, but it will not increase the I/O buffer space or cause the printer to print more pages per minute.

l NVRAM—Stores information about the I/O and print environment configuration. The printer

keeps the contents of NVRAM when the power is turned off or disconnected. (As in other HP LaserJet printers, downloaded fonts and macros are saved in conventional RAM and are lost when power is turned off.)

l Interfaces

• Parallel interface—Receives incoming data through its IEEE-1284 B interface connector. The IEEE-1284 B interface provides high-speed, two-way communication between the printer and the host, letting the user change printer settings and monitor printer status from the host computer.

• USB—Receives incoming data through its universal serial bus (USB) connector. The USB interface provides high-speed, two-way communication between the printer and the host, letting the user change printer settings and monitor printer status from the host computer.

• EIO—Supports a wide range of print servers and other add-on devices through PCI-based EIO slots. HP Jetdirect EIO cards provide high-speed communication for network printing over Ethernet, Ethernet and LocalTalk, Token Ring, or Fast Ethernet networks.

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Formatter subsystem

Resolution Enhancement technology

The formatter contains circuitry for Resolution Enhancement technology (REt), which modifies the standard video dot data on its way to the engine controller assembly to produce smoothed black-towhite boundaries. The default is on.

Print density adjustment

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

EconoMode

When EconoMode is turned on, the printer uses approximately 50 percent less toner than standard mode printing by reducing the dot density. Users can select EconoMode, which can also be thought of as draft mode, through software applications. The default setting is off. EconoMode does not affect print speed or memory usage.

Memory management

This printer uses various methods to conserve available memory. Several of these methods are explained belo w.

Memory Enhancement technology (MEt). MEt enhances standard printer memory through a variety of font and data compression methods. MEt also automatically compresses fonts for desktop publishing applications. MEt is available in all printing modes (PCL 5e, PCL 6, and HP PS emulation). When printing graph ics , MEt anal yz es each page as it is being printed an d automat ically applies a variety of compression techniques to print the complete page at the correct resolution.

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

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

Printer Job Language overview

Printer Job Language (PJL) is an integral part of the printer configuration, in addition t o the sta ndard Printer Command Language (PCL). PJL allows the printer to perform functions such as:

l Two-way communication with the host computer through an IEEE-1284 B interface

connection. The printer can tell the host such things as th e control panel settings and allow the control panel settings to be set from the host.

l Dynamic I/O switching allows the printer to be configured with a host on each I/O. The printer

can receive data from more than one I/O simultaneously until the buffer is full. This can occur even when the printer is offline.

l Context-sensitive switc hing allo ws th e printer to automatically recogniz e th e personalities (PS

or PCL) of each host and to configure itself to serve that personality.

l Isolating print envir onment settings f rom one print job to the ne xt. F or e xa mple, if a print job is

sent to the printer in landscape mode, subsequent print jobs only print in landscape if they are formatted for landscape printing.

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Laser/scanner system

The laser/scanner unit of this printer contains two laser diodes in its laser unit. The printer employs the “twin beam method” which scans two lines simultaneously.

Based on signals it receiv es f rom the DC contro ller and the formatter, the laser/sca nner PCB cau ses the two laser diodes to emit laser beams. The beams strike a six-sided mirror that rotates at a constant speed. The beams reflect off t he mirror , pa ss through a f ocusing lens an d a reflectiv e mirror , and focus on the photosensitive drum.

The scanning mirror rotating at a constant speed allows the laser beams to scan across the drum at a constant speed. Finally, a latent image is formed on the drum surface by constant-spe ed rotation of the photosensitive drum and constant-speed scanning of the laser beams.

Figure 37. Laser/scanner system

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Image formation system

The image formation system consists of the cartridge, transfer charging roller, and fuser. When a print command is sent from the formatter, the engine controller drives the main motor to

rotate the photosensitive drum, primary charging roller, developing cylinder, transfer charging roller, and pressure roller.

The primary charging roller applies a uniform negative charge to the photosensitive drum surface. Laser beams, modulated by the signals from the f ormatter, focus on the photose nsitive drum surface to form a latent image on the photosensitive drum.

Toner on the developing cylinder develops the latent image formed on the photosensitive drum into a visible image, which is transferred onto media by the tran sf er ch arging roller. The toner transf err ed is changed to a permanent image by heat and pressure in the fuser. The cleaning blade scrapes residual toner from the photosensitive drum, and the primary charging roller applies a uniform negative charge to the photosensitive drum surface in preparation for the next latent image.

Figure 38. Image formation

The eight processes of image formation

1 Conditioning (primary charging)—This process consists of the application of a uniform negative

charge to the surface of the drum with the primary charging roller located in the toner cartridge. The primary charging roller is made of conductive rubber. An AC bias is applied to the roller to erase any residual charges from any previous image. In addition, a negative DC bias is applied by the charging roller to create a uniform negative potential on the drum surface.

2 Writing (laser beam exposure)—Two laser diodes project laser beams onto a rotating scanning

mirror. As the mirror rotates, the beams reflect off the mirror, first through a set of focusing lenses, then off a mirror, and finally through a slot in the top of the toner cartridge, and onto the photosensitive drum. The twin beams s w eep th e drum from left t o right, dischar ging the n egativ e potential wherever the beams strike the surface. This creates a latent electrostatic image, which later is developed into a visible image.

3 Developing—At this stage of the process, the latent electrostatic image is present on the drum.

The toner particles obtain a negative surfa ce charge by rubbing against the developing cylinder which is connected to a negative DC supply. The negatively charged toner is attracted to the discharged (exposed, grounded) areas of the drum, and is repelled from the negatively charged (unexposed) areas.

4 Pre-transfer—Applies bias to prevent toner on the photosensitive drum from adhering to the

pre-transfer upper guide.

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5 Transfer—During the transfer process, the toner image on the drum surface is transferred to the

paper. The tr ansfer charging roller applies a positi ve charge to the back of the pa per a nd ca uses the negatively charged tone r on the drum surface to be attracted to the p aper. After separation, the drum is cleaned and conditioned for the next image.

6 Separation—During the separating process, the paper separates from the drum. To stabilize the

feed system and to prevent dropouts on the printed image at low temperature and humidity, the charge on the back of the paper is reduced by the static charge eliminato r.

7 Fusing—During the fusing process, the toner is fused to the paper by heat and pressure to

produce a permanent image. The paper passes between a heated fuser element and a soft pressure roller. This melts the toner and presses it into the paper.

8 Drum cleaning—The cleaning blade is in contact with the surface of the drum at all times. As

the drum rotates during printing, excess toner is scraped off and stored in the waste toner receptacle.

Print cartridge

Cartridge

Primary charging roller

Waste toner reservoir

Laser beams

Blade

Toner reservoirs

Cartridge memory

Developing cylinder

Cleaner blade

Photosensitive drum roller

Static charge eliminator

Figure 39. Cutaway view of print cartridge

Cartridge design

The design of the print cartridge incorporates dramatic changes in the toner hopper geometry and stirrer design. There are three main interconnecting toner reservoir areas, each with a cylindrical shape. A cylindrically shaped hopper effectively eliminates the packing and accumulation of toner in areas where it will not reach the development area. Another key improvement was realized in the design of the toner stirrer, where stirrers rotating within each of the hopper cylinders unpack the toner, allowing it to be displaced easily into the cartridge development area.

No shake toner

Shaking is not required at installation or end of cartridge life because the geometry of the hopper and stirrer design automatically redistributes and un pac ks t he toner. The overall design of the “no-shake” system is so efficient that when fading occurs for the first time, it is a sure indication that the cartridge has run out of toner. No need to shake the cartridge to get more toner for printing.

Plate antenna

Flat antenna

Pre-transfer guide

Transfer charging roller

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Cartridge memory

The print cartridge comes with built-in RAM. The printer detects the cartridge condition by reading and writing to this memory . The read/write of the memory is performed by the memory controller after receiving instructions from the DC controller through the antenna unit.

The DC controller instructs the memory controller PCB to perform read/write at the following timing:

l Read

• When the power is turned on.

• When the door cover is closed.

• When the DC controller receives a command from the formatter.

l Write

• When a print operation is completed.

• When the DC controller receives a command from the formatter.

The DC controller also detects cartridge memory failures. If the DC controller fails in a read/write attempt four times, it reports the failure to the formatter as a cartridge memory abnormality.

Toner seal

This print cartridge has incorporated an automatic toner seal roll up. When a new print cartridge is installed, the DC controller detects a new cartridge and sends a signal to the drum motor to roll up the toner seal.

The following describes the operation of this function. When a print cartridge is inserted, the power is turned on, or the door cover is closed, the DC

controller monitors the toner seal opening detectio n signal and ve rifies whether or not the cartridge is new. If the cartridge is new, an open signal from the DC controller is sent to the drum motor. This reverses the drum motor rotation, which rolls up the toner seal. After a short period of time, the DC controller turns off the open signal, completing the roll up sequence.

The DC controller also monitors the printer for presence of a print cartridge. When a cartridge is inserted, the same signal that instructs the cartridge to roll up the seal is used as a detection signal.

Toner level detection

The print cartridge has built-in toner level detect ion. T he DC con troller m onito rs t he to ne r level using feedback signals received from two antennae (plate and flat) in the cartridge.

The following describes the operation of this function. When the power is turned on, a door cover is closed, or a print operation is performed, the DC

controller sets the developing bias signal, the developing AC bias circut sends a signal to the toner level circut 1 and the developing cylinder. This causes the plate antenna to feedback the output value to the toner level circut 1. The toner level circut 1 compares the two signals and sends the results to the DC controller as the toner level detection signal. At the same time, the DC controller turns on the frequency output signal to output the reference frequency to the flat antenna. This causes the flat antenna to f eedback the output value to th e toner level circuit 2. The to ner level circut 2 compares the two signals and sends the results to the DC controller as the toner level detection signal, toner lev el accu racy to with in one percen t f rom 0 to 100 p ercent, th en reports the result to the formatter.

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Pickup and feed system

The pickup and feed system is divided into two blocks: pickup/feed and fuser/delivery. This printer contains two standard pickup sources (tray 2 and tray 3) and two delivery sources (face-up and facedown bins.)

The pickup unit picks up print paper one by one from tray 2 or tray 3. The feed unit transports the picked-up paper to the fuser unit.

When the printer is turned on, the paper is lifted by the lifter to where the paper pickup is enabled. When the DC controller receives a print command, the pickup roller starts rotating. This lowers the pickup roller down to the paper surface. A sheet of paper is fed to the feed rollers and the preregistration roller. The pre-registration roller corrects the paper skew.

After a short period of time, the paper is transferred to the photosensitive drum. The image on the drum is transferred onto the paper and the paper is transported to the fuser.

Media-size detection

Since this printer is capable of custom size media in all trays, the printer has a custom/standard switch and two size detection switches. The DC controller reads information from the two size detection switches in the trays to determine media width and length. If the switches are set to the custom size setting, the “X” and “Y” dimensions must be set in the control panel. The width det ection switches also sense the presence of trays: if all of the width detection switches are off, the DC controller assumes that a tray is missing.

Media-level detection

The media lev el in the trays is detected by the lifter that lifts the paper. The lifter contains a lifter blocking plate. This plate shuts off two sensors in each tray, allowing the lifter position to be detected. This detected position determines the media level.

Media level is based on approximate number of sheets in the tray. Depending on the lifter position, the sensors determine paper lev els as full (200 or mor e sheets), high (100 to 2 00 sheets), middle (50 to 100 sheets), or low (less than 50 sheets).

Multifeed prevention

The printer utilizes the separation roller method for its multiple feed prevention mechanism. This method drives the feed rollers and separation roller in the reverse direction from each other. The separation roller contains a torque limiter. When a multifeed occurs, the torque limiter allows the top sheet to feed into the printer, but returns the additional sheet to the tray.

Overhead transparency detection

The overhead t ransparency sensor emits light through the media p at h and re ads lig ht r efl ecte d back from a prism. When plain paper passes throug h the me d i a pa th , no light is ref lected back, but when a transparency passes through the media path, t he sensor can read the re flected light, indicating the presence of a transparency.

Fuser wrapping jam detection

The printer contains a mechanism to detect wrapping jams in the fuser. The DC controller sends signals to the pressure roller bias generation circuit. The circuit applies the same bias values to the pressure roller and to the wrapping jam detection circuit. The jam detection lever solenoid monitors the pressure roller bias through contact with the pressure roller. The wrapping jam detection circuit compares the monitored va lue to the applied v alue for differences in t he v alues . When the y dif f er, the circuit determines that a wrapping jam has occurred, and signals the DC controller to stop the printer.

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Jam detection

The printer detects jams according to the following conditions:

l Pickup 1 delay jam. Media does not reach the tray 2 feed sensor A (PS1402) or the tray 3 feed

sensor A (PS1404) within 5.3 seconds after pickup begins.

l Pickup 2 delay jam.

• Media does not reach the tray 2 feed sensor B (PS1401) or the tray 3 feed sensor B (PS1403) within 6.1 seconds after the tray 2 feed sensor A (PS1402) or the tray 3 feed sensor A (PS1404) detects the leading edge of the media.

• Media does not reach the registration paper sensor (PS2) within 4.4 seconds after the tray 2 feed sensor B (PS1401) detected the leading edge of the media, or within 4.8 seconds after the tray 3 feed sensor B (PS1403) detected the leading edge of the media.

l Fuser delivery 1 delay jam. The leading edge of the media does not reach the fuser delivery

sensor (PS502) within 1.4 seconds after the /VSYNC signal.

l Fuser delivery 2 delay jam. The leading edge of the media does not reach the fuser jam sensor

(PS501) within 1.6 seconds after the /VSYNC signal.

l Fuser delivery stationary jam. The trailing edge of the media does not clear the fuser delivery

sensor (PS502) within a specified time (3.4 seconds for A3 media, 2.5 seconds for A4 media) after the /VSYNC signal.

l Face-down delivery delay jam. The leading edge of the media does not reach the face-down

bin delivery sensor (PS1451) within 2.4 seconds after the /VSYNC signal.

l Face-down delivery stationary jam. The leading edge of the media does not clear the face-

down bin delivery sensor (PS1451) within a specified time (4.3 seconds for A3 media, 3.4 seconds for A4 media) after the /VSYNC signal.

l Door open jam. Any of the following sensors detect media upon opening or closing the door:

• Fuser jam sensor (PS501)

• Fuser delivery sensor (PS502)

• Tray 2 feed sensor B (PS1401)

• Tray 2 feed sensor A (PS1402)

• Tray 3 feed sensor B (PS1403)

• Tray 3 feed sensor A (PS1404)

• Face-down bin delivery sensor (PS1451)

l Residual jam. Any of the following conditions determine a residual jam:

• The fuser delivery sensor (PS502) and the fuser jam sensor (PS501) detect media when power to the printer is turned on.

• Three minutes have passed since a jam that should contain an automatic delivery command was cleared, but the CPU on the DC controller PCB has not received the automatic delivery command.

• A jam was cleared, jammed media was automat ically delivere d, power t o the printer is on, and the fuser roller has reached its target temperatur e, but at least one of the following sensors detects media:

• Registration paper sensor (PS2)

• Fuser delivery sensor (PS502)

• Fuser jam sensor (PS501)

• Tray 2 feed sensor B (PS1401)

• Tray 2 feed sensor A (PS1402)

• Tray 3 feed sensor B (PS1403)

• Tray 3 feed sensor A (PS1404)

• Face-down bin delivery sensor (PS1451)

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Figure 40. Pickup and feed system sensors and switches

98 Chapter 5 Theory of operation C8519-90912

HP LaserJet 9000 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Table of contents

List of tables

List of figures

1 Product information

Chapter contents

Product features

Product specifications

Product overview

External assembly locations

Interface connections

Optional accessories

Regulatory information

Regulatory requirements

FCC regulations

Declaration of conformity

Environmental product stewardship program

Service approach

Parts and supplies

Warranty

Limited warranty for print cartridge life

Service and support

Worldwide service and support offices

2 Product requirements

Chapter contents

Site requirements

Operating environment

Space requirements

Media specifications

Guidelines for selecting paper

Special media specifications

Storing print media

Testing media specifications

Tools and suppliers

Media input/output options

Trays, bins, and paper handling

Media sizes

3 Product configuration

Chapter contents

Control panel keys

Numeric keypad commands

Settings and defaults

Setting the display language

Setting tray registration

Printer driver information

Factory default settings

Control panel menus

Using a menu map

Menu map

Retrieve job menu

Information menu

Paper handling menu

Configure device menu

Network and mass storage

Remote firmware upgrade (RFU)

Downloading the new firmware to the printer

Using HP Web JetAdmin

4 Product maintenance

Chapter contents

Preventative maintenance

Preventive maintenance kit contents

General cleaning

Internal cleaning

Fuser cleaning

Print cartridge information

Storage

Handling instructions

Refilled print cartridges

Print cartridge weights

Print cartridge life expectancy

Saving toner with EconoMode

5 Theory of operation

Chapter contents

Basic operation

Sequence of operation

Power-on sequence

Timing chart