Hp LASERJET1200 User Manual

hp LaserJet 1200 series

service

HP LaserJet 1200 Series

Service

Part number C7044-90906 First edition, April 2001 Printed in USA

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.

NOTICE TO U.S. GOVERNMENT USERS: RESTRICTED RIGHTS COMMERCIAL COMPUTER SOFTWARE: “Use, duplication, or disclosure by the Government is subject to restrictions as set forth in subparagraph (c) (1)(ii) of the Rights in Technical Data Clause at DFARS 52.227-7013.”

Trademark Credits

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

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

All other products mentioned herein may be trademarks of their respective companies.

Safety Information WARNING! Potential Shock Hazard

Always follow basic safety precautions when using this product to reduce risk of injury from fire or electric shock.

1 Read and understand all

instructions in the user guide.

2 Observe all warnings and

instructions marked on the product.

3 Use only a grounded

electrical outlet when connecting the HP LaserJet 1200 printer to a power source. If you don’t know whether the outlet is grounded, check with a qualified electrician.

4 Do not touch the contacts

on the end of any of the sockets on the HP LaserJet 1200 printer. Replace damaged cords immediately.

5 Unplug this product from

wall outlets before cleaning.

6 Do not install or use this

product near water or when you are wet.

7 Install the product securely

on a stable surface.

8 Install the product in a

protected location where no one can step on or trip over the power cord and the power cord will not be damaged.

9 If the product does not

operate normally, see the online user guide.

10 Refer all servicing

questions to qualified personnel.

Information regarding FCC Class B, Parts 15 and 68 requirements can be found in the user guide.

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

1 Product information

Chapter contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Hardware description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Firmware description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Product specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Model and serial numbers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Overview of printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Front and side view. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Back and side view. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Overview of optional copier/scanner. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Top view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Warranty statement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Extended warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Toner cartridge information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Refilled toner cartridges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Recycling toner cartridges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

2 Installation and operation

Chapter contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

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

Identifying printer components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Printer control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Control panel light patterns. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Copier/scanner control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Selecting media. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Selecting media to print . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Selecting media to copy or scan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Loading media. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Loading media to print . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Loading media to copy or scan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Printer output paths . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Contents 3

3 Maintenance

Chapter contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Life expectancies of consumables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

User-replaceable parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Replacing the printer pickup roller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Replacing the printer separation pad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Replacing the copier/scanner separation pad . . . . . . . . . . . . . . . . . . . . . . . 45

Cleaning the equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Cleaning the print path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Cleaning the toner cartridge area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Cleaning the printer pickup roller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Cleaning the printer separation pad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Cleaning and recalibrating the copier/scanner . . . . . . . . . . . . . . . . . . . . . . . 51

Cleaning the scanner path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

4 Operational overview

Chapter contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Basic functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54

Formatter system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Draft mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

MEt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Enhanced I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

PJL overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Printer functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Engine control unit/power system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Image formation system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Printer paper-feed system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Jam detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Optional copier/scanner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Optical system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Document pickup and feed systems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Basic sequence of operation (formatter-to-printer). . . . . . . . . . . . . . . . . . . . 73

5 Removal and replacement

Chapter contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Removal and replacement strategy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Required tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Before performing service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

Toner cartridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

Parts removal order . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

4 Contents

Covers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Left side cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Optional copier/scanner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

Back cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Right side cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

Top cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

Control panel assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

Front cover assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

Internal assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

Transfer roller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

Formatter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

Laser/scanner assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

Fuser assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

Output rollers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

Motor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

Solenoid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

Fan assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

Right plate assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

Pickup assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

Pickup roller shaft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

Paper lift plate assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

Left plate assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

Bottom assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

ECU pan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

Paper-feed assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124

6 Troubleshooting

Chapter contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129

Basic troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130

Errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132

Control panel light messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132

Fatal error secondary messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135

Checking the toner cartridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137

Solving image-quality problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138

Solving paper-feed problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146

Solving print paper-feed problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146

Solving copying and scanning paper-feed problems . . . . . . . . . . . . . . . . . 148

Functional checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149

Engine test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149

Half self-test functional check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150

Drum rotation functional check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151

Heating element check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152

High-voltage power supply check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153

Paper path check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155

Contents 5

Service mode functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156

NVRAM initialization/cold reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156

PJL software commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156

Troubleshooting tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159

Internal reports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159

Repetitive image defect ruler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161

Main wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162

Locations of connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164

Locations of LEDs, jumpers, and switches. . . . . . . . . . . . . . . . . . . . . . . . . 165

7 Parts and diagrams

Chapter contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167

Ordering parts and supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168

Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168

Related documentation and software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168

Consumables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168

Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169

How to use the parts lists and diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171

Common hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171

Assembly locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172

Printer trays & optional copier/scanner . . . . . . . . . . . . . . . . . . . . . . . . . . . 172

Covers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174

Internal assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176

Internal components (1 of 2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176

Internal components (2 of 2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178

Electrical components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180

Paper pickup assembly (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182

Paper pickup assembly (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184

Fuser assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186

Alphabetical parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188

Numerical parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191

6 Contents

Figures

Figure 1. Model and serial number labels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Figure 2. Front and side view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Figure 3. Back and side view. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Figure 4. Top view. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Figure 5. Dimensions of printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Figure 6. Dimensions of printer with optional copier/scanner . . . . . . . . . . . . . . . 28

Figure 7. Printer control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Figure 8. Light status legend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Figure 9. Copier/scanner control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Figure 10. Scanning a business card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Figure 11. Output bin. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Figure 12. Straight-through output door. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Figure 13. Basic configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Figure 14. Printer unit functional block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Figure 15. ECU loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Figure 16. Overview of laser/scanner operation . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Figure 17. High-voltage power supply circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Figure 18. Image formation block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Figure 19. Printer path. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Figure 20. Solenoid, photosensors, and switches . . . . . . . . . . . . . . . . . . . . . . . . . 70

Figure 21. Copier/scanner path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Figure 22. General timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

Figure 23. Removing the toner cartridge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

Figure 24. Removing the left side cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Figure 25. Removing the optional copier/scanner. . . . . . . . . . . . . . . . . . . . . . . . . 81

Figure 26. Removing the back cover (1 of 2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Figure 27. Removing the back cover (2 of 2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Figure 28. Removing the right side cover (1 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . 84

Figure 29. Removing the right side cover (2 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . 85

Figure 30. Removing the right side cover (3 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . 86

Figure 31. Removing the top cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

Figure 32. Removing the control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

Figure 33. Removing the front cover (1 of 2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

Figure 34. Removing the front cover (2 of 2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

Figure 35. Removing the toner cartridge door (1 of 2). . . . . . . . . . . . . . . . . . . . . . 91

Figure 36. Removing the toner cartridge door (2 of 2). . . . . . . . . . . . . . . . . . . . . . 92

Figure 37. Removing the front guide assembly (1 of 3). . . . . . . . . . . . . . . . . . . . . 93

Figure 38. Removing the front guide assembly (2 of 3). . . . . . . . . . . . . . . . . . . . . 94

Figure 39. Removing the front guide assembly (3 of 3). . . . . . . . . . . . . . . . . . . . . 95

Figure 40. Removing the transfer roller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

Figure 41. Removing the formatter (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

Figures 7

Figure 42. Removing the formatter (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

Figure 43. Removing the laser/scanner (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . 99

Figure 44. Removing the laser/scanner (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . 100

Figure 45. Removing the fuser assembly (1 of 4) . . . . . . . . . . . . . . . . . . . . . . . . 101

Figure 46. Removing the fuser assembly (2 of 4) . . . . . . . . . . . . . . . . . . . . . . . . 102

Figure 47. Removing the fuser assembly (3 of 4) . . . . . . . . . . . . . . . . . . . . . . . . 103

Figure 48. Removing the fuser assembly (4 of 4) . . . . . . . . . . . . . . . . . . . . . . . . 104

Figure 49. Removing the output rollers (1 of 2). . . . . . . . . . . . . . . . . . . . . . . . . . 105

Figure 50. Removing the output rollers (2 of 2). . . . . . . . . . . . . . . . . . . . . . . . . . 106

Figure 51. Removing the motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

Figure 52. Removing the solenoid (1 of 2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

Figure 53. Removing the solenoid (2 of 2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

Figure 54. Removing the fan (1 of 2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

Figure 55. Removing the fan (2 of 2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

Figure 56. Removing the right plate assembly (1 of 2) . . . . . . . . . . . . . . . . . . . . 112

Figure 57. Removing the right plate assembly (2 of 2) . . . . . . . . . . . . . . . . . . . . 113

Figure 58. Removing the pickup assembly (1 of 3) . . . . . . . . . . . . . . . . . . . . . . . 114

Figure 59. Removing the pickup assembly (2 of 3) . . . . . . . . . . . . . . . . . . . . . . . 115

Figure 60. Removing the pickup assembly (3 of 3) . . . . . . . . . . . . . . . . . . . . . . . 116

Figure 61. Removing the pickup roller shaft . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

Figure 62. Removing the paper lift plate assembly . . . . . . . . . . . . . . . . . . . . . . . 118

Figure 63. Removing the left plate assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

Figure 64. Removing the ECU pan (1 of 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

Figure 65. Removing the ECU pan (2 of 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121

Figure 66. Removing the ECU pan (3 of 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122

Figure 67. Removing the ECU pan (4 of 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

Figure 68. Removing the paper-feed assembly (1 of 4) . . . . . . . . . . . . . . . . . . . 124

Figure 69. Removing the paper-feed assembly (2 of 4) . . . . . . . . . . . . . . . . . . . 125

Figure 70. Removing the paper-feed mechanism (3 of 4) . . . . . . . . . . . . . . . . . . 126

Figure 71. Removing the paper-feed mechanism (4 of 4) . . . . . . . . . . . . . . . . . . 127

Figure 72. Control panel location. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132

Figure 73. Engine test switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149

Figure 74. Locating connectors for the heating element check . . . . . . . . . . . . . . 152

Figure 75. Toner cartridge high-voltage connection points (right side) . . . . . . . . 153

Figure 76. Toner cartridge high-voltage connection points (left side) . . . . . . . . . 153

Figure 77. High-voltage connector assembly (right side) . . . . . . . . . . . . . . . . . . 154

Figure 78. High-voltage connector assembly (left side). . . . . . . . . . . . . . . . . . . . 154

Figure 79. Overriding SW301 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155

Figure 80. Self-test page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160

Figure 81. Repetitive image defect ruler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161

Figure 82. Main wiring (1 of 2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162

Figure 83. Main wiring (2 of 2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163

Figure 84. Locations of printer connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164

Figure 85. Locations of copier/scanner connectors. . . . . . . . . . . . . . . . . . . . . . . 164

Figure 86. Locations of LEDs, jumpers, and switches. . . . . . . . . . . . . . . . . . . . . 165

Figure 87. Assembly locations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172

Figure 88. Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174

8 Figures

Figure 89. Internal components (1 of 2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176

Figure 90. Internal components (2 of 2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178

Figure 91. Electrical components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180

Figure 92. Paper pickup assembly (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182

Figure 93. Paper pickup assembly (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184

Figure 94. Fuser assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186

Figures 9

10 Figures

Tables

Table 1. Physical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Table 2. Environmental specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Table 3. Power specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Table 4. Performance of HP LaserJet 1200 printer . . . . . . . . . . . . . . . . . . . . . . 17

Table 5. Performance of optional copier/scanner. . . . . . . . . . . . . . . . . . . . . . . . 17

Table 6. Print operating acoustical emissions specifications . . . . . . . . . . . . . . . 18

Table 7. Copy operating acoustical emissions specifications. . . . . . . . . . . . . . . 18

Table 8. Skew specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Table 9. Control panel light messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Table 10. Media types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Table 11. Life expectancies of consumables . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Table 12. Basic sequence of operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

Table 13. Basic troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130

Table 14. Control panel lights legend. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132

Table 15. Control panel light messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133

Table 16. Fatal error secondary messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135

Table 17. Solving print image-quality problems . . . . . . . . . . . . . . . . . . . . . . . . . 138

Table 18. Solving copying and scanning image-quality problems . . . . . . . . . . . 143

Table 19. Solving print paper-feed problems . . . . . . . . . . . . . . . . . . . . . . . . . . . 146

Table 20. Solving copying and scanning paper-feed problems . . . . . . . . . . . . . 148

Table 21. NVRAM PJL factory variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157

Table 22. Switch functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165

Table 23. Technical support websites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168

Table 24. Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169

Table 25. Common fasteners . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171

Table 26. Printer trays and optional copier/scanner. . . . . . . . . . . . . . . . . . . . . . 173

Table 27. Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175

Table 28. Internal components (1 of 2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177

Table 29. Internal components (2 of 2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179

Table 30. Electrical components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181

Table 31. Paper pickup assembly (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183

Table 32. Paper pickup assembly (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185

Table 33. Fuser assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187

Table 34. Alphabetical parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188

Table 35. Numerical parts list. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191

Tables 11

12 Chapter - Tables

Product information

Chapter contents

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Hardware description . . . . . . . . . . . . . . . . . . . . . . . . . .14

Firmware description . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Product specifications. . . . . . . . . . . . . . . . . . . . . . . . . .16

Model and serial numbers . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Overview of printer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

Front and side view . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Back and side view. . . . . . . . . . . . . . . . . . . . . . . . . . . .21

Overview of optional copier/scanner . . . . . . . . . . . . . . . . . . . 22

Top view. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

Warranty statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

Extended warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

Toner cartridge information . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Refilled toner cartridges . . . . . . . . . . . . . . . . . . . . . . . .25

Recycling toner cartridges . . . . . . . . . . . . . . . . . . . . . .25

Chapter contents 13

Introduction

The HP LaserJet 1200 printer is designed to:

With the optional copier/scanner, you can:

Hardware description

The printer provides 1200 dot-per-inch (dpi) printin g. The optional copier/scanner scans at 600 dpi/ 24-bits per pixel (bpp) and contains a document feeder that holds up to 30 pages.

The printer prints 15 pages per minute (ppm) on letter-size paper or 14 ppm on A4. With 1200 dpi printing resolution, the printer has exceptional text and graphics print quality. The simp le co nt ro l pan el and improved paper handling make this prod u c t ver y ea sy to use.

The printer’s main input tray has a 250-sheet capacity for continu ous, multiple-page printing. Manual, single-sheet printing is possible through the priority input tray. Both trays are center-justified for all supported paper sizes. The printer output bin holds up to 125 sheets.

Print—Print documents easily with the laser-quality you have come to expect from an HP LaserJet printer.

Copy—Make superior laser-quality copies. With the software, you can make up to 99 copies of a 30-p age original. You can also enlarge, reduce, adjust contrast, and collate.

Scan—Scan important documents to create electronic files.

The printer has a very fast first-page-out , at less than 10 seconds. The formatter board contains 8 MB of ROM, 8 MB of RAM, and an embedded 32-bit Coldfire V3 processor. There is one DIMM slot available for DIMM expansion (supporting an 8 MB, 16 MB, 32 MB, or 64 MB DIMM).

The printer engine has a 1,000 average (10,00 0 peak) page-permonth duty cycle. For the printer, the standard to ner life is 2,500 pages, and the high capacity toner life is 3,500 pages.

14 Chapter 1 - Product information

Firmware description

The firmware in the printer includes:

Enhanced PCL 6 with status readback

! 80 TrueType™ fonts, plus Cyrillic, Greek, Hebrew, and Arabic ! Pixel placement, mosaic characters

Memory Enhancement technology (MEt) with ha rd wa re

compression and decompression

The printer firmware also has REt and EconoMode function ality. Scan capability includes 600 dpi and 24-bit color.

Introduction 15

Product specifications

Table 1. Physical specifications

Category Specification

Height 253 mm (10 inches) without optional copier/

scanner 416 mm (16.4 inches) with optional copier/ scanner

Depth 486 mm (19.1 inches) Width 415 mm (16.3 inches) Weight (cartridge

installed)

Table 2. Environmental specifications

Category Specification

Operating environment (printer plugged into an AC outlet)

Storage environment (printer not plugged into an AC outlet)

7.3 kg (16.1 lb) without optional copier/scanner

8.7 kg (19.2 lb) with optional copier/scanner

! Temperature: 15° to 32.5° C (59° to 90.5° F) ! Humidity: 20% to 80% relative humidity

(no condensation)

! Temperature: 0° to 40° C (32° to 104° F) ! Humidity: 10% to 90% relative humidity

(no condensation)

16 Chapter 1 - Product information

Table 3. Power specifications

Category Specification

Power requirements

! 110 Vac (± 12%), 60 (± 3) Hz; 127 Vac

(± 12%), 60 (± 3) Hz

-Or-

! 220 Vac (± 12%), 50/60 (± 3) Hz ! 240 Vac (± 12%), 50 (± 3) Hz

Power sources are not interchangeable.

Power consumption (in continuous copy mode)

Power consumption (idle)

Power consumption (off)

Minimum recommended circuit capacity

Note

285 W

7 W

0 W

4.5 A at 115 V

2.3 A at 230 V

Table 4. Performance of HP LaserJet 1200 printer

Category Specification

Print resolution 1200 dpi Print speed 15 ppm (Letter)

14 ppm (A4)

Table 5. Performance of optional copier/scanner

Category Specification

Scan resolution 600 dpi optical, with 256 levels of gray and 24-bit

color

Copy speed 12 ppm

Introduction 17

Table 6. Print operating acoustical emissions specifications

Category Specification

Sound Power Level, L

(1 bel = 10 decibels)

WAd

Sound Pressure Level,

(operator position)

pAm

Sound Pressure Level,

(bystander position)

pAm

6.1 B(A)

56 dB(A)

48 dB(A)

Table 7. Copy operating acoustical emissions specifications

Category Specification

Sound Power Level,

(1 bel = 10 decibels)

WAd

Sound Pressure Level,

(operator position)

pAm

Sound Pressure Level,

(bystander position)

pAm

6.4 B(A)

60 dB(A)

50 dB(A)

Table 8. Skew specifications

Category Specification

Print skew—left 0.8% (2 mm over 250 mm in length) for

Print skew—right 1.5% (3.3 mm over 220 mm in width) for

Cut-sheet leading edge skew

Scan skew 1.2%

18 Chapter 1 - Product information

cut-sheet media)

1.5% (3.3 mm over 220 mm in length) for cut-sheet media

0.87 (1.65 mm over 190 mm in width) for cut-sheet media

envelopes, postcards, A5, and cut-sheet media

0.87% (1.6 mm over 190 mm in width)

Model and serial numbers

The model number and serial number are listed on an identification label located on the inside of the toner cartridge door.

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

The label also contains power rating and regulatory information.

Figure 1. Model and serial number labels

Model and serial numbers 19

Overview of printer

Front and side view

Figure 2. Front and side view

1 Printer control pan el

2 Long media extension (output bin) 3 Toner cartridge door 4 Priority input tray 5 Side media guides for the main input tray 6 Media support for the main input tray 7 Main input tray 8 Side media guides for the priority input tray

20 Chapter 1 - Product information

Back and side view

Figure 3. Back and side view

9 Fuser pressure release levers 10 Connection to optional copier/scanner 11 Left side cover 12 Parallel port 13 USB port 14 Power receptacle

15 Power switch (220-240 volt printers) 16 Straight-through output door

Overview of printer 21

Overview of optional copier/scanner

Top view

Figure 4. Top view

1 Media input tray guides 2 Copier/scanner door 3 Straight-through output door

4 Copier/scan ne r door rele a se bu tt on 5 Long media extensions 6 Media output bin 7 Copier/scanner control panel 8 Media input tray

Note See “Optional copier/ scanner” on page 81 for more information about

removing the optional copier/scanner from the printer.

22 Chapter 1 - Product information

Warranty statement

DURATION OF WARRANTY: One year from date of purchase.

1 HP warrants to you, the end-user customer, that HP hardware, accessories, and

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

2 HP warrants to you that HP software will not fail to execute its programming

instructions after the date of purchase, fo r the period specified above, due to defects in material and workmanship when properly installed and used. If HP receives notice of such defects during the warranty period, HP will replace software media which does not execute its pr og ra m min g instr uc tion s du e to such defects.

3 HP does not warrant that the operation of HP products will be uninterrupted or

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

4 HP products may contain remanufactured parts equivalent to new in performance

or may have been subject to incidental use.

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

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

6 HP MAKES NO OTHER EXPRESS WARRANTY OR CONDITION WHETHER

WRITTEN OR ORAL. TO THE EXTENT ALLOWED BY LOCAL LAW, ANY IMPLIED WARRANTY OR CONDITION OR MERCHANTABILITY, SATISFACTORY QUALITY, OR FITNESS FOR A PARTICULAR PURPOSE IS LIMITED TO THE DURATION OF THE EXPRESS WARRANTY SET FORTH ABOVE. Some countries, states, or provinces do not allow limitations on the duration of an implied warranty, so the above limitation or exclusion might not apply to you. This warranty gives you specific legal rights and you might also have other rights that vary from country to country, state to state, or province to province.

Warranty statement 23

7 TO THE EXTENT ALLOWED BY LOCAL LAW, THE REMEDIES IN THIS

WARRANTY STATEMENT ARE YOUR SOLE AND EXCLUSIVE REMEDIES. EXCEPT AS INDICATED ABOVE, IN NO EVENT WILL HP OR ITS SUPPLIERS BE LIABLE FOR LOSS OF DATA OR FOR DIRECT, SPECIAL, INCIDENTAL, CONSEQUENTIAL (INCLUDING LOST PROFIT OR DATA), OR OTHER DAMAGE, WHETHER BASED IN CONTRACT, TORT, OR OTHERWISE. Some countries, states, or provinces do not allow the exclusion or limitation of inciden tal or consequential damages, so the above limitation or exclusion may not apply to you.

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

Extended warranty

HP SupportPack provides coverage for the HP hardware product and all HP-supplied internal components. The hardware maintenance warranty covers a three-year period from the date of the HP product purchase. The customer must purchase the HP SupportPack within 90 days of the HP product purchase. The document number is 9036. Customers can contact the nearest HP-authorized dealer about this service.

24 Chapter 1 - Product information

Toner cartridge information

The toner cartridge is designed to simplify replacement of the major consumable parts. The toner cartridge contai ns the printing mechanism and a supply of toner.

At five percent page coverage, a toner cartridge will print approximately 2,500 pages. However, a toner cartridge should print more pages if it regularly prints pages with less coverage, such as short memos. The cartridge might print fewer pages if heavy or bold print is used.

For best results, always use a toner cartridge before the expiration date stamped on the toner cartridge box.

Refilled toner cartridges

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

! Repairs resulting from the use of refilled toner cartridges are not

covered under Hewlett-Packard warranty or maintenance contracts.

! Hewlett-Packard has no control or process to ensure that a

refilled toner cartridge functions at the high level of reliability of a new HP LaserJet toner cartridge. Hewlett-Packard also cannot predict the long term reliability effect on the printer from using different toner formulations found in refilled cartridges.

! The print quality of HP LaserJet toner cartridges in fluences the

customer’s perception of the printer. Hewlett-Packard has no control over the actual print quality of a refilled toner cartridge.

Recycling toner cartridges

In order to reduce waste, Hewlett-Packard offers a recycling program. Cartridge components that do not wear out are r ecycled. Plastics and other materials are recycled. Hewlet t-Packard pays the shipping costs from the user to the recycling plant (within the United States). To join this recycling effort, follow the instructions inside the toner cartridge box.

Toner cartridge information 25

26 Chapter 1 - Product information

Installation and

operation

Chapter contents

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

Identifying printer components . . . . . . . . . . . . . . . . . . . . . . . . 29

Printer control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Control panel light patterns. . . . . . . . . . . . . . . . . . . . . .30

Copier/scanner control panel . . . . . . . . . . . . . . . . . . . .32

Selecting media . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Selecting media to print . . . . . . . . . . . . . . . . . . . . . . . .33

Selecting media to copy or scan. . . . . . . . . . . . . . . . . .34

Loading media . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

Loading media to print . . . . . . . . . . . . . . . . . . . . . . . . .35

Loading media to copy or scan. . . . . . . . . . . . . . . . . . .36

Printer output paths . . . . . . . . . . . . . . . . . . . . . . . . . . .37

Chapter contents 27

Operating environment

Place the printer on a sturdy, level surface in a well-ventilated area that meets the following environmental requirements:

temperature: 10° to 32.5° C (50° to 90.5° F)

humidity: 20% to 80% relative humidity (no condensation)

! away from direct sunlight, open flames, and ammonia fumes ! sufficient space around the printer to allow fo r prop er acce ss and

ventilation

643 mm (25.3 inches)

253 mm (10.0 inches)

Figure 5. Dimensions of printer

416 mm (16.4 inches)

643 mm (25.3 inches)

Figure 6. Dimensions of printer with optional copier/scanner

28 Chapter 2 - Installation and operation

+ 178 hidden pages