HP LaserJet 1150, LaserJet 1300, LaserJet 1300N Schematic

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hp LaserJet

1150 1300 1300n

service

hp LaserJet 1150 and hp LaserJet 1300 series

service manual

Part number Q1334-90928 Edition 1, 4/2003 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 printer to a power source. If you do not 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 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.

Figures

Tables

1 Product information

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Hardware description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Firmware description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Product specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Model and serial numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Overview of printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Front and side view. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Back and side view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Warranty statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Extended warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Limited warranty for print cartridge life . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Print cartridge information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Print cartridge date stamp. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Refilled print cartridges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

HP LaserJet printing supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

HP printing supplies returns and recycling program information . . . . . . . . . 13

Material safety data sheet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

2 Installation and operation

Operating environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Identifying printer components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Printer control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Control panel light patterns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Selecting media. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Loading media . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Printer output paths . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

ENWW Contents iii

3 Maintenance

Life expectancies of components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

User-replaceable parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Replacing the printer pickup roller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Replacing the printer separation pad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Cleaning the equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Cleaning the print path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Cleaning the print cartridge area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Cleaning the printer pickup roller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Cleaning the printer separation pad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

4 Operational overview

Basic functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Formatter system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

EconoMode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

MEt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Enhanced I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

PJL overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Printer functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Engine control unit/power system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Image formation system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Printer paper-feed system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Jam detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Basic sequence of operation (formatter-to-printer) . . . . . . . . . . . . . . . . . . . . 59

5 Removal and replacement

Removal and replacement strategy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Required tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Before performing service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Print cartridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Parts removal order . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Differences between the printers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Locating the printer differences . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Left side cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Back cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

Right side cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Top cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Control panel assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Front cover assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Internal assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

Transfer roller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

Formatter (hp LaserJet 1300 series) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

Formatter (hp LaserJet 1150 printer) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

iv Contents ENWW

Laser/scanner assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

Fuser assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

Output rollers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

E-label assembly (hp LaserJet 1300 only) . . . . . . . . . . . . . . . . . . . . . . . . . . 97

Motor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

Solenoid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

Fan assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

Right plate assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

Pickup assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

Pickup roller shaft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

Paper lift plate assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

Left plate assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

Bottom assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

ECU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

Paper feed assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

Paper-feed roller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121

6 Troubleshooting

Basic troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128

Errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130

Control panel light messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130

Fatal error secondary messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133

Accessory error secondary messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135

Checking the print cartridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136

Solving image-quality problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137

Solving paper-feed problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142

Functional checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144

Engine test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144

Half self-test functional check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145

Drum rotation functional check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146

Heating element check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147

High-voltage power supply check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148

Paper path check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150

Service mode functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151

NVRAM initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151

Cold reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152

PJL software commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153

Troubleshooting tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155

Internal reports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155

Repetitive image defect ruler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158

Main wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159

Locations of connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162

Locations of LEDs, jumpers, and switches . . . . . . . . . . . . . . . . . . . . . . . . . 163

ENWW v

Contents

7 Parts and diagrams

Ordering parts and supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166

Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166

Related documentation and software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166

Consumables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166

Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167

How to use the parts lists and diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169

Common hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169

Assembly locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170

Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172

Internal assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174

Internal components (1 of 2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174

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

Left side plate assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178

Right side plate assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180

Electrical components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182

Paper pickup assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184

Paper feed guide assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186

Fuser assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188

Alphabetical parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190

Numerical parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194

Index

vi Contents ENWW

Figures

Figure 1. HP LaserJet 1150 printer label (220 volt) . . . . . . . . . . . . . . . . . . . . . . . . 7

Figure 2. HP LaserJet 1300 printer label (110 volt) . . . . . . . . . . . . . . . . . . . . . . . . 7

Figure 3. HP LaserJet 1300 printer label (220 volt) . . . . . . . . . . . . . . . . . . . . . . . . 7

Figure 4. Front and side view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Figure 5. Back and side view. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Figure 6. Dimensions of printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Figure 7. Printer control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Figure 8. Light status legend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Figure 9. Output bin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Figure 10. Straight-through output door. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Figure 11. Basic configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Figure 12. Printer unit functional block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Figure 13. ECU loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Figure 14. Overview of laser/scanner operation . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Figure 15. High-voltage power supply circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Figure 16. Image formation block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Figure 17. Printer path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Figure 18. Solenoid, photosensors, and switches . . . . . . . . . . . . . . . . . . . . . . . . . 58

Figure 19. General timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Figure 20. Removing the print cartridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Figure 21. Printer differences (front) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Figure 22. Printer differences (left side). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Figure 23. Printer differences (right side) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Figure 24. Removing the left side cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Figure 25. Removing the back cover (1 of 2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

Figure 26. Removing the back cover (2 of 2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Figure 27. Removing the right side cover (1 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . 72

Figure 28. Removing the right side cover (2 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . 73

Figure 29. Removing the right side cover (3 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . 74

Figure 30. Removing the top cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Figure 31. Removing the control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Figure 32. Removing the front cover (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Figure 33. Removing the front cover (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

Figure 34. Removing the print cartridge door (1 of 2) . . . . . . . . . . . . . . . . . . . . . . 79

Figure 35. Removing the print cartridge door (2 of 2) . . . . . . . . . . . . . . . . . . . . . . 80

Figure 36. Removing the front guide assembly (1 of 3). . . . . . . . . . . . . . . . . . . . . 81

Figure 37. Removing the front guide assembly (2 of 3). . . . . . . . . . . . . . . . . . . . . 82

Figure 38. Removing the front guide assembly (3 of 3). . . . . . . . . . . . . . . . . . . . . 83

Figure 39. Removing the transfer roller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

Figure 40. Removing the HP LaserJet 1300 series formatter (1 of 2) . . . . . . . . . . 85

Figure 41. Removing the HP LaserJet 1300 series formatter (2 of 2) . . . . . . . . . . 86

ENWW Figures vii

Figure 42. Removing the HP LaserJet 1150 printer formatter (1 of 2). . . . . . . . . . 87

Figure 43. Removing the HP LaserJet 1150 printer formatter (2 of 2). . . . . . . . . . 88

Figure 44. Removing the laser/scanner (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . 89

Figure 45. Removing the laser/scanner (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . 90

Figure 46. Removing the fuser assembly (1 of 4) . . . . . . . . . . . . . . . . . . . . . . . . . 91

Figure 47. Removing the fuser assembly (2 of 4) . . . . . . . . . . . . . . . . . . . . . . . . . 92

Figure 48. Removing the fuser assembly (3 of 4) . . . . . . . . . . . . . . . . . . . . . . . . . 93

Figure 49. Removing the fuser assembly (4 of 4) . . . . . . . . . . . . . . . . . . . . . . . . . 94

Figure 50. Removing the output rollers (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

Figure 51. Removing the output rollers (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

Figure 52. Removing the e-label assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

Figure 53. Removing the motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

Figure 54. Removing the solenoid (1 of 2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

Figure 55. Removing the solenoid (2 of 2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

Figure 56. Removing the fan (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

Figure 57. Removing the fan (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

Figure 58. Removing the right plate assembly (1 of 3) . . . . . . . . . . . . . . . . . . . . 103

Figure 59. Removing the right plate assembly (2 of 3) . . . . . . . . . . . . . . . . . . . . 104

Figure 60. Removing the right plate assembly (3 of 3) . . . . . . . . . . . . . . . . . . . . 105

Figure 61. Removing the pickup assembly (1 of 3) . . . . . . . . . . . . . . . . . . . . . . . 106

Figure 62. Removing the pickup assembly (2 of 3) . . . . . . . . . . . . . . . . . . . . . . . 107

Figure 63. Removing the pickup assembly (3 of 3) . . . . . . . . . . . . . . . . . . . . . . . 108

Figure 64. Removing the pickup roller shaft (1 of 2) . . . . . . . . . . . . . . . . . . . . . . 109

Figure 65. Removing the pickup roller shaft (2 of 2) . . . . . . . . . . . . . . . . . . . . . . 110

Figure 66. Removing the paper lift plate assembly . . . . . . . . . . . . . . . . . . . . . . . 112

Figure 67. Removing the left plate assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

Figure 68. Removing the ECU (1 of 5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

Figure 69. Removing the ECU (2 of 5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116

Figure 70. Removing the ECU (3 of 5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

Figure 71. Removing the ECU (4 of 5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

Figure 72. Removing the ECU (5 of 5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

Figure 73. Removing the paper feed assembly . . . . . . . . . . . . . . . . . . . . . . . . . . 120

Figure 74. Removing the paper-feed roller (1 of 5) . . . . . . . . . . . . . . . . . . . . . . . 121

Figure 75. Removing the paper-feed roller (2 of 5) . . . . . . . . . . . . . . . . . . . . . . . 122

Figure 76. Removing the paper-feed roller (3 of 5) . . . . . . . . . . . . . . . . . . . . . . . 123

Figure 77. Removing the paper-feed roller (4 of 5) . . . . . . . . . . . . . . . . . . . . . . . 123

Figure 78. Removing the paper-feed roller (5 of 5) . . . . . . . . . . . . . . . . . . . . . . . 124

Figure 79. Reinstalling the paper-feed roller . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

Figure 80. Control panel location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130

Figure 81. Engine test switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144

Figure 82. Locating connectors for the heating element check . . . . . . . . . . . . . . 147

Figure 83. Print cartridge high-voltage connection points (right side) . . . . . . . . . 148

Figure 84. Print cartridge high-voltage connection points (left side) . . . . . . . . . . 148

Figure 85. High-voltage connector assembly (right side) . . . . . . . . . . . . . . . . . . 149

Figure 86. High-voltage connector assembly (left side). . . . . . . . . . . . . . . . . . . . 149

Figure 87. Overriding SW301 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150

Figure 88. Self-test page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157

viii Figures ENWW

Figure 89. Repetitive image defect ruler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158

Figure 90. Main wiring (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159

Figure 91. Main wiring (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160

Figure 92. Optional paper feeder wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161

Figure 93. Locations of printer connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162

Figure 94. Locations of LEDs, jumpers, and switches . . . . . . . . . . . . . . . . . . . . . 163

Figure 95. Assembly locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170

Figure 96. Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172

Figure 97. Internal components (1 of 2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174

Figure 98. Internal components (2 of 2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176

Figure 99. Left side plate assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178

Figure 100. Right side plate assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180

Figure 101. Electrical components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182

Figure 102. Paper pickup assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184

Figure 103. Paper feed guide assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186

Figure 104. Fuser assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188

ENWW Figures ix

x Figures ENWW

Tables

Table 1. Physical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Table 2. Environmental specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Table 3. Power specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Table 4. Performance of HP LaserJet 1150 printer . . . . . . . . . . . . . . . . . . . . . . . 5

Table 5. Performance of HP LaserJet 1300 series printer . . . . . . . . . . . . . . . . . . 5

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

Table 7. Skew specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Table 8. HP hardware product numbers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Table 9. Control panel light messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Table 10. Media types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Table 11. Life expectancies of components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Table 12. Basic sequence of operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Table 13. Basic troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128

Table 14. Control panel lights legend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130

Table 15. Control panel light messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131

Table 16. Fatal error secondary messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133

Table 17. Accessory error secondary messages . . . . . . . . . . . . . . . . . . . . . . . . 135

Table 18. Solving print image-quality problems . . . . . . . . . . . . . . . . . . . . . . . . . 137

Table 19. Solving paper-feed problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142

Table 20. NVRAM PJL factory variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153

Table 21. Switch functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163

Table 22. Technical support websites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166

Table 23. Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167

Table 24. Common fasteners . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169

Table 25. Printer assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171

Table 26. Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173

Table 27. Internal components (1 of 2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175

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

Table 29. Electrical components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183

Table 30. Paper pickup assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185

Table 31. Fuser assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189

Table 32. Alphabetical parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190

Table 33. Numerical parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194

ENWW Tables xi

xii Tables ENWW

Product information

Chapter contents

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Hardware description . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Firmware description . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Product specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Model and serial numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Overview of printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Front and side view . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Back and side view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Warranty statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Extended warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Limited warranty for print cartridge life . . . . . . . . . . . . . . . . . . 12

Print cartridge information . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Print cartridge date stamp . . . . . . . . . . . . . . . . . . . . . . 12

Refilled print cartridges . . . . . . . . . . . . . . . . . . . . . . . . . 13

HP LaserJet printing supplies. . . . . . . . . . . . . . . . . . . . 13

ENWW Chapter contents 1

Introduction

The HP LaserJet 1150 and 1300 series printers are designed to print documents easily with the laser-quality you have come to expect from an HP LaserJet printer.

Hardware description

The printer provides 1200 dot-per-inch (dpi) printing.

The HP LaserJet 1150 prints 18 pages per minute (ppm) on lettersize paper or 17 ppm on A4. The HP LaserJet 1300 prints 20 ppm on letter-size paper or 19 ppm on A4. With 600 x 2 (Fast Res 1200) printing resolution, these printers have exceptional text and graphics print quality. The simple control panel and improved paper handling make this product very easy to use.

The printer’s main input tray has a 250-sheet capacity for continuous, 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.

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. The HP LaserJet 1300 has 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 (10,000 peak) page-permonth duty cycle. The standard print cartridge life is 2,500 pages, and, for the HP LaserJet 1300 series, the high capacity print cartridge life is 4,000 pages.

The HP LaserJet 1300n printer is network ready with an HP Jetdirect 200m print server included.

2 Chapter 1 - Product information ENWW

Firmware description

The firmware in the printer includes:

z Host-based and PCL 5e printing

z Enhanced PCL 6 with status readback (HP LaserJet 1300 only)

z 80 TrueType™ fonts, plus Cyrillic, Greek, Hebrew, and Arabic

z Pixel placement, mosaic characters

z Memory Enhancement technology (MEt) with hardware

compression and decompression

The printer firmware also has Resolution Enhancement technology (REt) and EconoMode functionality.

ENWW Introduction 3

Product specifications

Table 1. Physical specifications

Category Specification

Height 253 mm (10 inches)

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)

8.5 kg (18.6 lb)

z Temperature: 10° to 32.5° C (50° to 90.5° F) z Humidity: 20% to 80% relative humidity

(no condensation)

z Temperature: 0° to 40° C (32° to 104° F) z Humidity: 10% to 80% relative humidity

(no condensation)

4 Chapter 1 - Product information ENWW

Table 3. Power specifications

Category Specification

Power requirements

z 110 Vac (± 10%), 60 (± 3) Hz; 127 Vac

(± 10%), 60 (± 2) Hz

-Or-

z 220 Vac (± 10%), 50/60 (± 2) Hz z 240 Vac (± 10%), 50 (± 2) Hz

Note Power sources are not

interchangeable.

Power consumption (during printing)

Power consumption (idle)

Power consumption (off)

Minimum recommende d circuit capacity

320 W

7 W

0 W

4.5 A at 115 V

2.4 A at 230 V

Table 4. Performance of HP LaserJet 1150 printer

Category Specification

Print resolution 1200 dpi

Print speed 18 ppm (Letter)

17 ppm (A4)

Table 5. Performance of HP LaserJet 1300 series printer

Category Specification

Print resolution 1200 dpi

Print speed 20 ppm (Letter)

19 ppm (A4)

ENWW Introduction 5

Table 6. Print operating acoustical emissions specifications

Category Specification

Sound Power Level,

(1 bel = 10 decibels)

WAd

Sound Pressure Level, L

(operator position)

pAm

Sound Pressure Level,

(bystander position)

pAm

6.3 Bels(A)

63 dB(A)

Table 7. Skew specifications

Category Specification

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

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

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

envelopes, postcards, A5, and cut-sheet media

Cut-sheet leading edge skew

0.87% (1.6 mm over 190 mm in width)

6 Chapter 1 - Product information ENWW

Model and serial numbers

The model number and serial number are listed on an identification label located on the inside of the print cartridge door. The serial number contains information about the country/region of origin, revision level, production code, and production number of the printer. The label also contains power rating and regulatory information.

Figure 1. HP LaserJet 1150 printer label (220 volt)

Figure 2. HP LaserJet 1300 printer label (110 volt)

Figure 3. HP LaserJet 1300 printer label (220 volt)

ENWW Model and serial numbers 7

Overview of printer

Front and side view

Figure 4. Front and side view

1 Printer output bin

2 Long media extension

3 Print cartridge door

4 Ready light

5 Go button and light

6 Attention light

7 Main input tray

8 Priority input tray

8 Chapter 1 - Product information ENWW

Back and side view

Figure 5. Back and side view

9 Fuser pressure release levers

10 Straight-through output door

11 On/off switch

12 Power receptacle

13 USB port

14 Parallel port (HP LaserJet 1150 printer)

LIO connectivity slot (HP LaserJet 1300 series)

15 HP Jetdirect print server (HP LaserJet 1300n printer only)

16 Parallel LIO adaptor (HP LaserJet 1300 series)

ENWW Overview of printer 9

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, for 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 programming instructions due to such

defects.

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

error free. If HP is unable, within a reasonable time, to repair or replace any

product to a condition as warranted, 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/regions, 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/region to country/region, state to state, or

province to province.

10 Chapter 1 - Product information ENWW

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/regions, states, or provinces do not allow the exclusion or limitation of

incidental 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

For the latest information on HP SupportPack options available for the HP LaserJet 1150 and 1300 series printers, see http://lookup.supportpack.hp.com HP hardware product number for the product. See table 8 for these product numbers.

Table 8. HP hardware product numbers

. You will need the

Product Product number

HP LaserJet 1150 Q1336A

HP LaserJet 1300 Q1334A

HP LaserJet 1300n Q1335A

Optional 250-sheet paper feeder for the HP LaserJet 1300 series

ENWW Warranty statement 11

Q2485A

Limited warranty for print cartridge life

This HP print cartridge is warranted to be free from defects in materials and workmanship for cartridge life (until the HP toner is depleted).

Your HP toner is depleted when you begin to see faded or light type on your printed page. HP will, at HP’s option, either replace products which prove to be defective or refund your purchase price.

The warranty does not cover cartridges which have been refilled, are emptied, abused, misused, or tampered with in any way.

This limited warranty gives you specific legal rights. You may have other rights which vary from state to state, province to province, and country/region to country/region.

To the extent allowed by applicable law, in no event shall HewlettPackard Company be liable for any incidental, consequential, special, indirect, punitive, or exemplary damages or lost profits from any breach of this warranty or otherwise.

In the event that your product proves to be defective, please return it to place of purchase with a written description of the problem.

Print cartridge information

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

At five percent page coverage, the standard print cartridge for the HP LaserJet 1150 and 1300 printers will print approximately 2,500 pages. The actual page yield obtained by a customer depends upon factors such as the percentage of coverage on the pages printed, toner density setting, EconoMode, and environmental conditions (temperature and humidity).

Print cartridge date stamp

Some HP LaserJet print cartridge packages are stamped with an alphanumeric date code. This code represents a 30-month period beyond the date of production in order to facilitate efficient inventory

12 Chapter 1 - Product information ENWW

management processes between HP and its resellers. It does not serve as an indication of toner life or relate in any way to warranty terms and conditions.

Refilled print cartridges

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

z Repairs resulting from the use of refilled print cartridges are not

covered under Hewlett-Packard warranty or maintenance contracts.

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

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

z The print quality of HP LaserJet print cartridges influences the

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

HP LaserJet printing supplies

In many countries/regions, this product’s printing supplies (such as print cartridge, drum, and fuser) can be returned to Hewlett-Packard through the HP printing supplies returns and recycling program. This easy-to-use, free takeback program is available in over 48 countries/regions. Multilingual program information and instructions are included in every new HP print cartridge and consumables package.

HP printing supplies returns and recycling program information

Since 1990, the HP printing supplies returns and recycling program has collected millions of used print cartridges that otherwise might have been discarded in the world’s landfills. The HP LaserJet print cartridges and consumables are collected and bulk-shipped to our resource and recovery partners who disassemble the print cartridge. After a thorough quality inspection, selected parts are reclaimed for use in new print cartridges. Remaining materials are separated and converted into raw materials for use by other industries to make a variety of useful products.

ENWW Print cartridge information 13

U.S. recycling returns

For a more environmentally responsible return of used print cartridges and consumables, Hewlett-Packard encourages you to use bulk returns. Simply bundle two or more print cartridges together and use the single, prepaid, pre-addressed label that is supplied in the package. For more information in the U.S., call (800) 340-2445 or visit the HP LaserJet supplies Web site at http://www.hp.com/recycle

Non-U.S. recycling returns

Non-U.S. customers should call the local HP sales and service office or visit the http://www.hp.com/recycle

website more information regarding availability of the HP printing supplies returns and recycle program.

For more information

For more information on the following HP environmental programs, see http://www.hp.com/go/environment

z Product environmental profile sheet for this and many related HP

products

z HP's commitment to the environment

z HP's environmental management system

z HP's end-of-life product return and recycling program

z Material safety data sheets

Material safety data sheet

Material safety data sheets (MSDS) can be obtained by contacting the HP LaserJet supplies website at http://www.hp.com/go/msds

14 Chapter 1 - Product information ENWW

Installation and

operation

Chapter contents

Operating environment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Identifying printer components . . . . . . . . . . . . . . . . . . . . . . . . 17

Printer control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Control panel light patterns. . . . . . . . . . . . . . . . . . . . . . 18

Selecting media . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Loading media . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Printer output paths . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

ENWW Chapter contents 15

Operating environment

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

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

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

z away from direct sunlight, open flames, and ammonia fumes

z sufficient space around the printer to allow for proper access and

ventilation

643 mm (25.3 inches)

253 mm (10.0 inches)

Figure 6. Dimensions of printer

16 Chapter 2 - Installation and operation ENWW

Identifying printer components

Printer control panel

The printer control panel has two lights and one lighted button. These lights produce patterns that identify the printer status.

Figure 7. Printer control panel

z GO button and light—Prints demo pages. (To print a demo page

or to continue printing while in manual feed mode, press and release the G

z Ready light—Indicates that the printer is ready to print.

z Attention light—Indicates that the main input tray is empty, print

cartridge door is open, print cartridge is missing, or other errors.

O button.)

Ready light (green)

Go button and

light (green)

Attention light (amber)

ENWW Identifying printer components 17

Control panel light patterns

Light off

Light on

Light blinking

Figure 8. Light status legend

Note For detailed information on solving problems indicated by control panel

lights, see “Errors” on page 130.

Table 9. Control panel light messages

Light status

Condition of the printer Action

Ready

The printer is ready to print.

Processing

The printer is receiving or processing data.

No action is necessary. To print a demo page, press and release the the printer control panel.

Wait for the job to print.

GO button on

18 Chapter 2 - Installation and operation ENWW

Table 9. Control panel light messages (continued)

Light status

Condition of the printer Action

Manual feed or out of memory

The printer is in manual feed mode or out of memory. You can continue printing.

Door open, media out, no print cartridge, or paper jam

The printer is in an error state that requires operator intervention or help.

Printer Initialization/Cancel Job/Cleaning Mode

A printer initialization is taking place. If all lights blink for half of a second or longer in a sequence:

z the printer is initializing z all previously sent print

jobs are being purged

z a cleaning page is being

printed

Make sure that you have loaded the correct media. To continue printing, press and release the

The software controls manual feed. If you do not want the printer to be in manual feed mode, change the setting from the printer properties. See the printer software for more information.

The page being printed might be too complex for the printer memory capacity.

z To continue printing, press and release

the

z Reduce the resolution. See the user

guide for more information.

z Add more memory. See the user guide

for more information.

z Make sure that the print cartridge door

is completely closed.

z Make sure that the media is loaded

correctly. See the user guide for instructions.

z Make sure that the print cartridge is

correctly installed in the printer. See the user guide for instructions.

z If the printer still has an error, there is a

paper jam. See the user guide for instructions.

No action is necessary.

GO button.

ENWW Identifying printer components 19

Table 9. Control panel light messages (continued)

Light status

Condition of the printer Action

Fatal error

All lights are on.

Accessory error

All lights are blinking. (HP LaserJet 1300 series only)

z Turn the printer off and then back on. z Unplug the printer for five minutes, and

then plug it back in.

z If the printer still has an error, see

chapter 6, “Troubleshooting.”

z Remove the DIMMs and reseat. See

the user guide for instructions.

z If the printer still has an error, replace

the DIMMs.

20 Chapter 2 - Installation and operation ENWW

Selecting media

You can use paper with up to 100 percent recycled fiber content if it meets specifications. For more information about media specifications, see the HP LaserJet printer family print media guide. This guide is available in .pdf format online at

http://www.hp.com/support/ljpaperguide

user guide.

Highly textured stock might not print evenly. Very glossy paper might jam or repel toner. Multipart forms can wrinkle or get jammed in the printer. And paper in poor condition, such as paper with tears, wrinkles, or bent edges, can jam.

Do not use envelopes that have a very slick finish, ones that have self-stick adhesives, or those with clasps or windows. Also do not use envelopes with thick, irregular, or curled edges, or areas that are wrinkled, torn, or otherwise damaged.

Use a sturdy envelope of approximately 60 to 90 g/m weight. Use tightly constructed envelopes, and make sure that the folds are sharply creased.

The main input tray can hold up to 250 sheets of 75 g/m media. The priority input tray can hold up to 10 sheets, one envelope, or one piece of heavy media. Both can be adjusted to hold media measuring from 76.2 by 127 mm (3 by 5 inches) to 216 by 356 mm (8.5 by 14 inches). This includes, but is not limited to, the following paper and envelope sizes:

. To order HP paper, see the

(16 to 24 lb)

(20 lb) print

Table 10. Media types

Paper type Metric English

Letter 216 by 279 mm 8.5 by 11 in

Legal 216 by 356 mm 8.5 by 14 inches

Executive 184 by 267 mm 7.25 by 10.5 inches

A4 210 by 297 mm 8.25 by 11.75 inches

COM10 Envelopes 105 by 241 mm 4.13 by 9.5 inches

DL Envelopes 110 by 220 mm 4.33 by 8.67 inches

C5 Envelopes 162 by 229 mm 6.4 by 9 inches

B5 Envelopes 176 by 250 mm 6.9 by 9.85 inches

Monarch Envelopes 98.5 by 191 mm 3.88 by 7.5 inches

Custom-sized media custom custom

ENWW Selecting media 21

Note Narrow and heavy media can cause the printer to print slower.

22 Chapter 2 - Installation and operation ENWW

Loading media

Main input tray

The main input tray holds up to 250 sheets of 75 g/m2 (20 lb) paper, 30 envelopes, or a 25 mm (0.98 inches) stack of heavier media. Load media with the top forward and the side to be printed facing up. To prevent jams and skew, always adjust the side media guides.

Priority input tray

The priority input tray holds up to ten pages of 75 g/m2 (20 lb) paper or one envelope, transparency, or card. Load media with the top forward and the side to be printed facing up. To prevent jams and skew, always adjust the side media guides.

CAUTION If you try to print on media that is wrinkled, folded, or damaged in any

way, a jam might occur. See the user guide for more information.

Note When you add new media, make sure that you remove all of the media

from the input tray and straighten the stack of new media. This helps prevent multiple sheets of media from feeding through the printer at one time, reducing jams.

Specific types of media

z Transparencies and labels: Load transparencies and labels

with the top forward and the side to be printed facing up. See the user guide for more information.

z Envelopes: Load envelopes with the narrow, stamp side forward

and the side to be printed facing up. See the user guide for more information.

z Letterhead or preprinted forms: Load with the top forward and

the side to be printed facing up. See the user guide for more information.

z Cards and custom-sized media: Load with the narrow side

forward and the side to be printed facing up. See the user guide for more information.

ENWW Loading media 23

Printer output paths

Output bin

The output bin is located on the top of the printer. Printed media is collected here in the correct sequence when the straight-through output door is closed. Use the output bin when printing normal and large, collated documents.

Extend to support media.

Figure 9. Output bin

Straight-through output path

The straight-through output path is useful when you are printing envelopes, transparencies, heavy media, or any media that tends to curl when printed. Printed media exits in reverse order when the straight-through output door is open.

Figure 10. Straight-through output door

Note Printed media does not stack when you use the straight-through output

path. The media drops to the surface below unless you remove each sheet as it exits the printer.

24 Chapter 2 - Installation and operation ENWW

Maintenance

Chapter contents

Life expectancies of components . . . . . . . . . . . . . . . . . . . . . . 26

User-replaceable parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Replacing the printer pickup roller . . . . . . . . . . . . . . . . 27

Replacing the printer separation pad . . . . . . . . . . . . . . 30

Cleaning the equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Cleaning the print path . . . . . . . . . . . . . . . . . . . . . . . . . 34

Cleaning the print cartridge area . . . . . . . . . . . . . . . . . 35

Cleaning the printer pickup roller . . . . . . . . . . . . . . . . . 37

Cleaning the printer separation pad . . . . . . . . . . . . . . . 38

ENWW Chapter contents 25

Life expectancies of components

Inspect components when servicing the printer. Replace components as needed, based on failure or wear, rather than on usage.

The following table lists approximate schedules for replacing components.

Table 11. Life expectancies of components

Description Part number Estimated

Remarks life (pages)

HP LaserJet 1150 print cartridge (user replaceable)

HP LaserJet 1300 print cartridge (user replaceable)

Printer transfer roller RM1-0545-000CN 50,000 Can affect print quality and/or

Printer pickup roller RL1-0303-000CN 50,000 Look for glazing and/or cracks.

Printer separation pad RF0-1014-000CN 50,000 Can affect paper movement.

Fuser assembly (100-127 V)

Fuser assembly (220-240 V)

* The estimated print cartridge life is based on letter- or A4-sized paper with an average of five percent toner coverage and a medium density setting. Print cartridge life can be extended further by conserving toner using the EconoMode setting. However, HP does not recommend full-time use of EconoMode. If EconoMode is used full-time when the average toner coverage is significantly less than five percent, it is possible that the toner supply will outlast the mechanical parts in the print cartridge.

Q2624A 2,500 When print becomes faint,

Q2613A 2,500 When print becomes faint,

Q2613X 4,000

RM1-0535-000CN 50,000 Can affect print quality and paper

RM1-0536-000CN 50,000 Can affect print quality and paper

redistribute toner in the cartridge

by gently shaking the cartridge

from side to side.

redistribute toner in the cartridge

by gently shaking the cartridge

from side to side.

paper movement.

movement.

User-replaceable parts

Replace the printer pickup roller and the printer separation pad when the parts are near the end of their life expectancies or if media frequently misfeeds.

26 Chapter 3 - Maintenance ENWW

Replacing the printer pickup roller

If the printer regularly misfeeds (no media feeds through), you might have to replace or clean the pickup roller.

CAUTION Failure to complete this procedure might damage the printer.

1 Unplug the power cord from the printer, and allow the printer to

cool.

2 Open the print cartridge door, and remove the print cartridge.

3 Locate the pickup roller.

ENWW User-replaceable parts 27

4 Release the small tabs on each side of the pickup roller by

pushing them away from the roller, and then rotate the pickup roller toward the front.

CAUTION The tabs are fragile. Be careful not to break them.

5 Gently pull the pickup roller up and out.

6 Position the new pickup roller in the slot of the previous pickup

roller.

Note Circular and rectangular pegs on each side prevent you from incorrectly

positioning the pickup roller.

28 Chapter 3 - Maintenance ENWW

7 Rotate the top of the new pickup roller into position until the tabs

on each side of the roller snap the roller into place.

CAUTION The tabs are fragile. Be careful not to break them.

8 Reinstall the print cartridge, and close the print cartridge door.

9 Plug the printer in and turn it back on.

ENWW User-replaceable parts 29

Replacing the printer separation pad

Note Before you change the separation pad, clean the pickup roller. See

“Cleaning the printer pickup roller” on page 37 for instructions.

If the input tray feeds more than one page at a time, you might have to replace the printer separation pad. Recurring feed problems indicate that the printer separation pad is worn.

CAUTION During this procedure, be careful not to break the tabs on the separation

pad.

1 Unplug the power cord from the printer, and allow the printer to

cool.

2 Remove the input trays.

3 Locate the blue separation pad. (For the HP LaserJet 1300

series, you might need to push down the media lift plate to see the separation pad.)

30 Chapter 3 - Maintenance ENWW

4 To pry the separation pad up from the spring-loaded base, insert

a flat-edged screwdriver in the slot under the separation pad and twist until the tabs are free.

CAUTION The tabs are fragile. Be careful not to break them.

5 Reach in through the input tray opening, push the spring-loaded

base down with one hand, and pull the separation pad up with the other hand.

6 With one hand, position the new separation pad in the slot of the

previous separation pad (A). With the other hand, reach through the input tray opening, and push the spring-loaded base down (B).

Note The tab on the right is larger to help you position the separation pad

correctly.

ENWW User-replaceable parts 31

7 Snap both sides of the separation pad firmly into place.

CAUTION Make sure that the separation pad is straight and that there is no space

between the separation pad and the spring-loaded base. If the separation pad is not straight or you see space on one side, remove the separation pad, make sure that the larger tab is on the right, reinsert the separation pad, and snap both sides into place.

8 Reinstall the input trays, and then plug the printer in and turn it

back on.

32 Chapter 3 - Maintenance ENWW

Cleaning the equipment

WARNING! Before you perform these steps, unplug the printer to avoid shock

hazard.

To maintain quality, thoroughly clean the printer:

z Any time a new print cartridge is installed.

z After printing approximately 2,500 pages.

z Whenever print quality problems appear.

Clean the outside of the printer with a water-dampened cloth. Clean the inside with only a dry, lint-free cloth (such as a lens tissue).

To avoid permanent damage to the print cartridge, do not use ammonia-based cleaners on or around the printer.

WARNING! Avoid touching the heating element in the fuser. It might be very hot

and can cause burns.

CAUTION Do not touch the surface of the black sponge transfer roller.

Contaminants on the roller can cause print quality problems.

ENWW Cleaning the equipment 33

Cleaning the print path

Use this process if you discover toner specks or dots on printouts. This process produces a transparency with toner debris, which should be discarded.

Note This process requires a transparency to remove dust and toner from

the print paper path. Do not use bond or rough paper.

Make sure the transparency you use meets media requirements for the printer.

If transparency film is unavailable, you can use paper. If you must use paper, perform the procedure two or three times to ensure proper cleaning.

1 Load a transparency in the priority input tray.

2 Make sure that the printer is in the Ready state.

3 Press and hold the G

feeds through the printer slowly. Discard the transparency.

Note After you press and hold the GO button, the three printer lights blink

until the cleaning process is complete.

O button for 10 seconds. The transparency

34 Chapter 3 - Maintenance ENWW

Cleaning the print cartridge area

Cleaning the print cartridge area can improve the quality of your printed sheets.

WARNING! Before cleaning the printer, disconnect it from the power source and

wait for the printer to cool.

1 Open the print cartridge door, and remove the print cartridge.

CAUTION To prevent damage, do not expose the print cartridge to light. Cover

the print cartridge if necessary. Also, do not touch the black sponge transfer roller inside the printer. Touching it can reduce the print quality of output.

2 Wipe the media path area and the print cartridge cavity with a dry,

lint-free cloth.

Note Use only a dry, lint-free cloth to remove dust and toner. Using a vacuum

or other device to clean inside the product can damage it.

ENWW Cleaning the equipment 35

3 Replace the print cartridge, and close the print cartridge door.

4 Plug the power cord back into the printer.

36 Chapter 3 - Maintenance ENWW

Cleaning the printer pickup roller

If you want to clean the pickup roller rather than replace it, follow the instructions below.

Remove the pickup roller as described in steps 1 through 5 of “Replacing the printer pickup roller” on page 27.

1 Dampen a lint-free cloth in isopropyl alcohol, and scrub the roller.

WARNING! Alcohol is flammable. Keep the alcohol and cloth away from an open

flame. Before you close the printer and plug in the power cord, allow the alcohol to dry completely.

2 Using a dry, lint-free cloth, wipe the pickup roller to remove

loosened dirt.

3 Allow the pickup roller to dry completely before you reinstall it in

the printer. To reinstall the pickup roller, see steps 6 through 9 of “Replacing the printer pickup roller” on page 27.

ENWW Cleaning the equipment 37

Cleaning the printer separation pad

If you want to clean the separation pad rather than replace it, follow the instructions below.

1 Remove the separation pad as described in steps 1 through 5 of

“Replacing the printer separation pad” on page 30.

2 Dab a lint-free cloth in isopropyl alcohol, and scrub the pad.

WARNING! Alcohol is flammable. Keep the alcohol and cloth away from an open

flame. Before you close the printer and plug in the power cord, allow the alcohol to dry completely.

38 Chapter 3 - Maintenance ENWW

3 Using a dry, lint-free cloth, wipe the pad to remove the loosened

dirt.

4 Allow the pad to dry completely before you reinstall it in the

printer. To reinstall the pad, see steps 6 through 8 of “Replacing the printer separation pad” on page 30.

ENWW Cleaning the equipment 39

40 Chapter 3 - Maintenance ENWW

Operational overview

Chapter contents

Basic functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Formatter system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Central processing unit . . . . . . . . . . . . . . . . . . . . . . . . . 43

RAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Parallel, LIO, or USB interface . . . . . . . . . . . . . . . . . . . 43

Control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

EconoMode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

MEt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Enhanced I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

PJL overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Printer functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Engine control unit/power system. . . . . . . . . . . . . . . . . 47

Image formation system . . . . . . . . . . . . . . . . . . . . . . . . 52

Printer paper-feed system . . . . . . . . . . . . . . . . . . . . . . 55

Jam detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Basic sequence of operation (formatter-to-printer) . . . . . . . . 59

ENWW Chapter contents 41

Basic functions

This chapter presents a functional overview of the printer’s processes. The following systems are discussed:

z formatter

z printer functions

• engine control unit (ECU) system/power system

• image formation system

• paper-feed system (printer)

Figure 11. Basic configuration

42 Chapter 4 - Operational overview ENWW

Formatter system

The formatter is responsible for the following:

z receiving and processing print data from the printer interface

z monitoring the control panel and relaying printer status

information

z developing and coordinating data placement and timing with the

print engine

z communicating with the host computer through the bidirectional

interface

The formatter receives print data from the parallel interface, the Lowcost Input/Output (LIO) interface (supports an HP Jetdirect print server or a Bluetooth wireless adaptor), or the Universal Serial Bus (USB) interface and converts it into a dot image. The ECU synchronizes the image formation system with the paper-feed system and signals the formatter to send the print image data. The formatter sends the print image data (dots) in the form of a video signal, and the printing process begins.

Central processing unit

The formatter incorporates an embedded Coldfire V3 microprocessor operating at 132 MHz.

RAM

z One bank of Non-Volatile RAM (NVRAM) stores parameters.

z Dynamic random access memory (DRAM) provides temporary

storage of print data.

Parallel, LIO, or USB interface

The formatter receives incoming data through its bidirectional parallel, LIO, or USB interface. This interface provides high-speed, two-way communication between the printer and the host, allowing you to change printer settings and monitor printer status from the host computer.

ENWW Formatter system 43

Control panel

The control panel consists of the following elements:

z three front panel status lights (one contained in the GO button)

z GO button

EconoMode

Depending on which printer driver is used, selecting EconoMode from the printer driver allows the printer to use approximately fifty percent less toner, extending the life of the print cartridge.

MEt

HP MEt effectively doubles the standard memory through a variety of font and data-compression methods.

Enhanced I/O

The Enhanced I/O feature allows printer memory to be used for storing data received from the host computer. When Enhanced I/O is enabled, you can send more data to the printer in shorter amounts of time, which allows you to return to your application sooner. Enhanced I/O has the following options:

z Auto—allows the printer to use Enhanced I/O memory allocation

to increase the speed of data transfer from the host computer to the printer, if necessary. The default setting is Auto.

z Off—uses the minimum amount of printer memory for storing

data sent from the host computer.

z Page Protect—allows the formatter to create the entire page

image in page buffer memory before physically moving the media through the printer. This process ensures that the entire page will be printed. The default setting is Auto.

Page complexity (ruling lines, complex graphics, or dense text) can exceed the printer’s ability to create the page image fast enough to keep pace with the image formation process. If Page Protect is disabled and a page is too complex, the page might print in parts (for example, the top half on one page and the bottom half on the next page). Some print-data loss is likely in these instances, and the printer will display an error message.

44 Chapter 4 - Operational overview ENWW

PJL overview

Printer Job Language (PJL) is an integral part of configuration, in addition to the standard Printer Command Language (PCL). With standard cabling, PJL allows the printer to perform functions such as:

z Two-way communication with the host computer through a

bidirectional parallel or LIO connection. The printer can tell the host such things as the control panel status.

z Isolation of print environment settings from one print job to the

next. For example, if a print job is sent to the printer in landscape mode, the subsequent print jobs print in landscape only if they are formatted for landscape printing.

Note PJL commands can be sent to the printer only from a DOS command

prompt and through a parallel cable. DOS applications are not supported over a USB interface.

ENWW Formatter system 45

Printer functions

Printer functions are divided into five groups:

z engine control

z formatter

z image formation

z laser/scanner

z pickup and feed

The following figure is a block diagram of the printer unit:

Figure 12. Printer unit functional block diagram

46 Chapter 4 - Operational overview ENWW

Engine control unit/power system

The engine control unit (ECU) coordinates all print engine activities, drives the laser, and coordinates print data from the formatter with the image formation process. The ECU also includes power supply and distribution circuitry.

Note In several other HP LaserJet products, the ECU is also known as the

controller PCA or the DC controller PCA.

The ECU controls the following systems and functions:

z Printer engine control

• paper motion monitoring and control (printing)

• motor

z Printer laser/scanner

z Power system

• AC power distribution

• DC power distribution

• overcurrent/overvoltage protection

• high-voltage power distribution

ENWW Printer functions 47

The following figure shows the various ECU loads:

Figure 13. ECU loads

48 Chapter 4 - Operational overview ENWW

Printer engine control system

Paper motion monitoring and control

The ECU controls paper motion in the printer by continuously monitoring the various paper sensors and coordinating the timing with the other print processes.

For a detailed explanation of paper movement and the interaction of the photosensors and solenoid with the paper movement process, see “Printer paper-feed system” on page 55.

Motor

The motor is controlled by the ECU. The motor provides all of the printer paper movement.

Printer laser/scanner drive

The ECU sends signals to the laser/scanner assembly to modulate the laser diode “on” and “off” and to drive the laser/scanner motor.

Figure 14. Overview of laser/scanner operation

ENWW Printer functions 49

Power system on ECU

The AC, DC, and high-voltage power supply circuits are all contained within the ECU.

AC power distribution

The AC power circuitry supplies AC voltage whenever the power cord is connected to the AC power source. AC voltage is distributed to the DC power supply circuitry and to the AC driver circuitry, which controls AC voltage to the fuser assembly heating element.

DC power distribution

The DC power distribution circuitry, located on the ECU, distributes +3.3 Vdc, +5 Vdc, and +24 Vdc as follows:

z +3.3 Vdc: Formatter

Laser/beam detect circuitry ECU Photosensors

z +5 Vdc: Formatter

ECU Laser/beam detect circuitry

z +24 Vdc: Motor

Exhaust fan Laser/scanner motor Document scanner motor Solenoid Formatter (routing only) High voltage power supply Fuser safety circuit

Overcurrent/overvoltage

There are two overvoltage devices in this printer:

z Fuse F101 provides overcurrent protection for the fusing system

circuitry. Checking or replacing the fuse requires the removal of the ECU. Fuse F102 provides overcurrent protection to the printer DC power supply circuitry.

z In addition, the +24 Vdc and +3.3 Vdc power circuitry contains an

overcurrent protection circuit that automatically shuts off the output voltage when an overcurrent condition occurs as a result of a short or an abnormal voltage on the load side.

50 Chapter 4 - Operational overview ENWW

High-voltage power distribution

The high-voltage power supply applies an overlap of DC and AC voltage to the primary charging roller and the developing roller. This circuit also applies a positive or negative DC voltage to the transfer roller according to the instructions from the engine control unit.

This circuit also controls the image density by changing the primary AC voltage and the developing AC bias according to the print density setting.

High voltage is disabled when the printer door is open.

Figure 15. High-voltage power supply circuit

ENWW Printer functions 51

Image formation system

Laser printing requires the interaction of several different technologies including electronics, optics, and electrophotographics to provide a printed page. Each process functions independently and must be coordinated with the other printer processes. Image formation consists of seven processes:

Figure 16. Image formation block diagram

Print cartridge

As the focal point of the image formation system, the print cartridge houses the cleaning, conditioning, and developing stages of the process. The print cartridge contains the photosensitive drum, primary charging roller, developing station, toner cavity, and cleaning station. By including these components (which wear, degrade, or are consumed) in the replaceable print cartridge, the need for many service calls is eliminated. The special photosensitive properties of the drum form an image on the drum surface and then transfer the image to media.

CAUTION The print cartridge does not include a light-blocking shutter. Do not

expose the drum to light, which can permanently damage the drum. Protect the print cartridge whenever removing it from the printer.

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Breakdown of the seven image formation processes

1 Conditioning stage (primary charging)—This process applies

a uniform negative charge to the surface of the drum with the primary charging roller, which is located in the print cartridge. The primary charging roller is coated with conductive rubber. An AC bias is applied to the roller to erase any residual charges from any previous image. In addition, the primary charging roller applies a negative DC bias to create a uniform negative potential on the drum surface. The print density setting modifies the DC voltage.

2 Writing stage (scanning exposure)—During this process, a

modulated laser diode projects the beam onto a rotating scanning mirror. As the mirror rotates, the beam reflects off the mirror, first through a set of focusing lenses, then off a mirror, and finally through a slot in the top of the print cartridge, and onto the photosensitive drum. The beam sweeps the drum from left to right, discharging the negative potential wherever the beam strikes the surface. This creates a latent electrostatic image, which later is developed into a visible image.

Because the beam sweeps the entire length of the drum while the drum rotates, the entire surface area of the drum can be covered. At the end of each sweep, the beam strikes the beam detect lens, generating the beam detect signal (BD signal). The BD signal is sent to the ECU where it is converted to an electrical signal used to synchronize the output of the next scan line of data.

3 Developing stage—During this process, the latent electrostatic

image is present on the drum. The toner particles obtain a negative surface 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 it is repelled from the negatively charged (unexposed) areas.

4 Transfer stage—During this process, the toner image on the

drum surface is transferred to the media. The transfer roller applies a positive charge to the back of the media, which attracts the negatively charged toner on the drum surface to the media. After separation, the drum is cleaned and conditioned for the next image.

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5 Separation stage—During this process, the media separates

from the drum. To stabilize the feed system and prevent toner dropouts on the printed image at low temperature and humidity, the static eliminator reduces the charge on the back of the media.

6 Fusing stage—During this process, the heat and pressure fuse

the toner into the media to produce a permanent image. The media passes between a heated fusing element and a soft pressure roller, which melt the toner and press it into the media.

7 Drum cleaning stage—During this process, the cleaning blade

is in contact with the surface of the drum at all times. As the drum rotates during printing, it wipes excess toner off the drum and stores it in the waste toner receptacle.

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Printer paper-feed system

Step 1 The main input tray and the priority input tray merge into one,

main input area. Media placed in any of these areas enables the paper detection sensor (PS931), which informs the ECU that media is present. The following steps occur when the printer receives a print job:

Step 2 The ECU enables the laser/scanner assembly and the motor.

Paper motion begins when the ECU energizes the solenoid (SL001).

Step 3 The paper pickup roller rotates once. The paper lift plate

pushes the media against the pickup roller.

Step 4 The pickup roller grabs the top sheet and advances it to the

feed assembly drive rollers. To ensure that only one sheet is fed, a main separation pad and two subpads hold the remainder of the stack in place.

Step 5 The feed assembly drive rollers advance the media to the

paper top sensor (PS911). This sensor informs the ECU of the exact location of the leading edge of media, so that the image being written on the photosensitive drum can be precisely positioned on the page.

Step 6 The feed assembly drive rollers then advance the media to

the transfer area where the toner image on the photosensitive drum is transferred to media.

Step 7 After the image is transferred, the media enters the fuser

assembly where heat from the fuser and pressure from the pressure roller permanently bond the toner image to media. The paper delivery sensor (PS921) determines that media has successfully moved out of the fusing area.

Step 8 The fuser assembly exit rollers deliver media to either the

paper output bin or the straight-through output path, depending upon the position of the straight-through output path door.

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Figure 17. Printer path

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Jam detection

The paper detection sensor (PS931) detects the presence of media in either the priority input tray or the main input tray. The paper top sensor (PS911) and the paper delivery sensor (PS921) detect media moving through the printer. If a jam is detected, the ECU immediately stops the printing process and displays a jam message on the control panel.

A jam can be detected under any of the following conditions:

z Pickup delay jam—Media does not reach the paper top sensor

(PS911) after the pickup solenoid (SL001) has been turned on twice (the original pickup plus a retry) within 2 seconds.

z Pickup stationary jam—The paper top sensor (PS911) does not

detect the trailing edge of media within 1 second of detecting the leading edge.

z Delivery-delay jam—The paper delivery sensor (PS921) does

not detect the leading edge of media within 1.5 seconds after the paper top sensor (PS911) detects the leading edge.

z Wrapping jam—The paper delivery sensor (PS921) does not

detect the trailing edge of the media within 0.1 second after the paper top sensor (PS911) detects the leading edge, and one second has passed after the paper delivery sensor detected the leading edge.

z Delivery-stationary jam—The paper delivery sensor (PS921)

does not detect the leading edge of media within 1.6 seconds after the paper top sensor (PS911) detects the trailing edge.

z Residual paper jam—The paper top sensor (PS911) or the

paper delivery sensor (PS921) detect media in the initial rotation period.

z Door open jam—The paper top sensor (PS911) or the paper

delivery sensor (PS921) detect media while the print cartridge door is open.

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Solenoid, photosensors, and switches

The following figure shows the locations of the solenoid, photosensors, and switches.

Figure 18. Solenoid, photosensors, and switches

1 Paper delivery sensor (PS921) senses when paper has

successfully moved out of the fusing area.

2 Power switch.

3 Paper top sensor (PS911) detects the leading and trailing edges

of the paper. It synchronizes the photosenstive drum and the top of the paper.

4 Engine test switch (SW201); see “Engine test” on page 144 for an

explanation of the switch.

5 Door-open switch (SW301) detects whether or not the printer

door is closed and the print cartridge is present. Printing cannot continue until the printer door is closed and the print cartridge is in its correct position.

6 Solenoid (SL001) enables the pickup roller.

7 Paper detection sensor (PS931) senses when paper is in the

main input tray or the priority input tray.

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Basic sequence of operation (formatter-toprinter)

The operation sequence of the printer is controlled by the microprocessor (CPU) on the ECU. The following events take place during normal printer operation:

Table 12. Basic sequence of operation

Period Purpose Remarks

WAIT After the printer is turned on until the end of the initial rotation of the main motor.

STBY (Standby) From the end of the WAIT period or the LSTR period until the pickup command is input from the formatter. Or, from the end of the LSTR period until the printer is turned off.

INTR (Initial Rotation Period) After the pickup command has been input from the formatter until the media reaches the pickup solenoid.

PRINT (Print) From the end of the initial rotation until the primary voltage goes OFF.

LSTR (Last Rotation Period) After the primary voltage goes OFF until the main motor stops rotating.

To clear the drum surface of electric potential and to clean the transfer charging roller.

To keep the printer ready to print.

To stabilize the photosensitive drum sensitivity in preparation for printing. Also to clean the transfer charging roller.

To form images on the photosensitive drum based on the VIDEO signals (/VDO, VDO) input from the formatter and to transfer the toner image onto the media.

To deliver the last page. Also to clean the transfer charging roller.

Detects whether or not the cartridge is installed.

When the pickup command is input from the formatter, the printer enters the INTR period immediately after the end of the LSTR period.

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Figure 19. General timing diagram

60 Chapter 4 - Operational overview ENWW

Removal and

replacement

Chapter contents

Removal and replacement strategy . . . . . . . . . . . . . . . . . . . . 63

Required tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Before performing service . . . . . . . . . . . . . . . . . . . . . . 64

Print cartridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Parts removal order . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Differences between the printers . . . . . . . . . . . . . . . . . . . . . . 66

Locating the printer differences . . . . . . . . . . . . . . . . . . 66

Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Left side cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Back cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

Right side cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Top cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Control panel assembly . . . . . . . . . . . . . . . . . . . . . . . . 76

Front cover assembly . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Print cartridge door . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

Front guide assembly . . . . . . . . . . . . . . . . . . . . . . . . . . 81

Internal assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

Transfer roller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

Formatter (hp LaserJet 1300 series) . . . . . . . . . . . . . . 85

Formatter (hp LaserJet 1150 printer) . . . . . . . . . . . . . . 87

Laser/scanner assembly. . . . . . . . . . . . . . . . . . . . . . . . 89

Fuser assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

Output rollers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

E-label assembly (hp LaserJet 1300 only) . . . . . . . . . . 97

ENWW Chapter contents 61

Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

Solenoid. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

Fan assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

Right plate assembly . . . . . . . . . . . . . . . . . . . . . . . . . 103

Pickup assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

Pickup roller shaft . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

Paper lift plate assembly . . . . . . . . . . . . . . . . . . . . . . 111

Left plate assembly . . . . . . . . . . . . . . . . . . . . . . . . . . 113

Bottom assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

ECU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

Paper feed assembly . . . . . . . . . . . . . . . . . . . . . . . . . 120

Paper-feed roller . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121

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Removal and replacement strategy

This chapter documents the removal and replacement of field replaceable units (FRUs) only.

Replacement is generally the reverse of removal. Occasionally, notes are included to provide directions for difficult or critical replacement procedures.

WARNING! Unplug the power cord from the power outlet before attempting

to service the printer. If this warning is not followed, severe injury can result. Certain functional checks during troubleshooting must be performed with power supplied to the printer. However, the power supply should be disconnected during removal.

Never operate or service the printer with the protective cover removed from the laser/scanner assembly. The reflected beam, although invisible, can damage your eyes.

The sheet metal edges of the printer can be sharp. Use caution when working on the printer.

CAUTION Some printer parts are electrostatic discharge (ESD) sensitive. Always

perform service work at an ESD-protected workstation.

To install a self-tapping screw, first turn it counterclockwise to align it with the existing thread pattern, then carefully turn it clockwise to tighten. Do not overtighten. If a self-tapping screw-hole becomes stripped, repair the screw-hole or replace the affected assembly.

Always remove the print cartridge before removing or replacing parts. See “Print cartridge” on page 64.

Required tools

z #2 Phillips-head screwdriver with magnetic tip

z Small flatblade screwdriver

z Needle nose pliers

z ESD mat

z Penlight

CAUTION A PoziDriv screwdriver will damage screw heads on the printer. Use a

#2 Phillips-head screwdriver.

ENWW Removal and replacement strategy 63

Before performing service

z Remove all media from the printer.

z Unplug the power cable.

z Place the printer on an ESD mat.

z Remove the main input tray.

z Remove the print cartridge (see below).

Print cartridge

Note You will feel resistance when you open the print cartridge door.

1 Open the print cartridge door, which lifts the print cartridge toward

you.

2 Remove the print cartridge.

CAUTION To prevent damage, do not expose the print cartridge to light. Cover it

with a piece of paper.

Figure 20. Removing the print cartridge

64 Chapter 5 - Removal and replacement ENWW

Pickup roller

Separation pad

Transfer roller

Left side cover

Formatter

Back cover

Parts removal order

Use the following diagram to determine which parts must be removed before removing other parts:

Right side cover

Top cover

Solenoid

Fan assembly

(Fuser)

Control panel

Front cover assembly

Right plate assembly

(Formatter)

Pickup assembly

Pickup roller shaft

ECU

Paper-feed assembly

Motor

Left plate assembly

Laser/scanner

Fuser assembly

Output rollers

E-label assembly (1300 series only)

Paper lift plate assembly

Note The fuser and the formatter are listed twice.

The fuser must be removed to gain access to the right plate assembly. To remove the fuser only, remove the left side, back, right side, and top covers.

The formatter must be removed to gain access to the pickup assembly, the ECU, and the left plate assembly. To remove the formatter only, remove the left side cover.

ENWW Removal and replacement strategy 65

Differences between the printers

The HP LaserJet 1150 and the HP LaserJet 1300 series printers share most components in common. However the HP LaserJet 1300 series has some components that the HP LaserJet 1150 does not have. Most of these components accommodate the optional paper feeder. Other differences are that the print cartridge for the HP LaserJet 1150 does not have e-label capability, so the printer has no e-label reader assembly, and the HP LaserJet 1150 does not require an ESD shield over the formatter.

The printers also look slightly different at the left rear corner, where the connections for the USB and parallel cables are located. The HP LaserJet 1300 series has an LIO connectivity slot where the HP LaserJet 1150 has a parallel connection. This difference does not affect disassembly.

Locating the printer differences

Except where noted, the photographs in this manual are of the HP LaserJet 1300 series printer. Figure 21, Figure 22, and Figure 23 indicate components that the HP LaserJet 1300 series has but the HP LaserJet 1150 does not. These components are listed below. The numbers in the list refer to the numbered callouts in the figures.

1 Media transfer guide

2 Connection block and cable guide for the optional paper feeder

3 ESD shield (over the formatter)

4 Link arm for the e-label assembly

5 Gear for driving the optional paper feeder

Note The photo in Figure 21 shows most of the covers removed.

66 Chapter 5 - Removal and replacement ENWW

Figure 21. Printer differences (front)

Figure 22. Printer differences (left side)

ENWW Differences between the printers 67

Figure 23. Printer differences (right side)

68 Chapter 5 - Removal and replacement ENWW

Covers

Left side cover

1 Pull out on the notch (callout 1) on the back of the cover.

2 Rotate the cover away from the printer.

Figure 24. Removing the left side cover

ENWW Covers 69

Back cover

1 Remove the left side cover (see “Left side cover” on page 69).

2 Open the straight-through output door.

3 Remove two screws (callout 1) from the back of the printer.

Figure 25. Removing the back cover (1 of 2)

70 Chapter 5 - Removal and replacement ENWW

4 Press down and hold the two release levers (callout 2) and pull

the cover off of the printer.

Note The back cover has two tabs (not shown), one on each side of the

printer. Releasing the levers in step 4 releases these two tabs.

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

ENWW Covers 71

Right side cover

1 Open the print cartridge door.

2 Remove the back cover (see “Back cover” on page 70).

3 Remove one screw (callout 1) on the back of the printer.

Figure 27. Removing the right side cover (1 of 3)

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4 Lift the right side of the printer and release the tab (callout 2) on

the bottom of the cover.

Figure 28. Removing the right side cover (2 of 3)

ENWW Covers 73

5 While continuing to press the release tab, grasp the top of the

cover and rotate it away from the printer.

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

74 Chapter 5 - Removal and replacement ENWW

Top cover

1 Remove the left side cover (see “Left side cover” on page 69).

2 Remove the back cover (see “Back cover” on page 70).

3 Remove the right side cover (see “Right side cover” on page 72).

4 Open the print cartridge door.

5 Loosen two screws (callout 1) on the back of the printer.

6 Remove two screws (callout 2) on the top of the printer.

7 Lift the cover off of the printer.

Figure 30. Removing the top cover

ENWW Covers 75

Control panel assembly

1 Remove the left side cover (see “Left side cover” on page 69).

2 Remove the back cover (see “Back cover” on page 70).

3 Remove the right side cover (see “Right side cover” on page 72).

4 Remove the top cover (see “Top cover” on page 75).

5 Disconnect the control panel cable (callout 1) from the formatter.

6 Remove three screws (callouts 2, 3, and 4) from the top of the

control panel assembly.

Note The second screw (callout 3) secures the control panel casing, and the

third screw (callout 4) secures the internal bracket. Be sure to hold the assembly together as you remove it.

7 Rotate the control panel assembly toward the front of the printer

to release the tab (callout 5), and remove the control panel assembly.

Figure 31. Removing the control panel

Note When reinstalling the control panel, be sure to route the wires so they

do not interfere with the motion of the print cartridge door mechanisms as the door is opened and closed.

76 Chapter 5 - Removal and replacement ENWW

Front cover assembly

The front cover assembly is composed of three pieces:

z front cover (the frame that surrounds the main input tray)

z print cartridge door

z front guide assembly (the internal shelf that attaches the front

cover and the print cartridge door to the printer)

Front cover

1 Remove the left side cover (see “Left side cover” on page 69).

2 Remove the back cover (see “Back cover” on page 70).

3 Remove the right side cover (see “Right side cover” on page 72).

4 Remove the top cover (see “Top cover” on page 75).

5 Close the print cartridge door.

6 Loosen two screws (one shown, callout 1), one on each side of

the cover.

Figure 32. Removing the front cover (1 of 2)

ENWW Covers 77

7 Pull the top of the front cover away from the printer to release the

three tabs (callout 2).

8 Lift the front of the printer to release the tabs on the bottom of the

front cover.

9 Remove the front cover.

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

78 Chapter 5 - Removal and replacement ENWW

Print cartridge door

1 Remove the left side cover (see “Left side cover” on page 69).

2 Remove the back cover (see “Back cover” on page 70).

3 Remove the right side cover (see “Right side cover” on page 72).

4 Remove the top cover (see “Top cover” on page 75).

5 Remove the control panel assembly (see “Control panel

assembly” on page 76).

6 Remove the front cover (see “Front cover assembly” on page 77).

7 Open the print cartridge door.

8 At the right side, press the two small tabs (callout 1) on the inside

of the connecting link to release it.

9 Repeat on the left side.

Note After the print cartridge door is removed, it is easy to remove the two

connecting links.

Figure 34. Removing the print cartridge door (1 of 2)

ENWW Covers 79

10 Unhook the print cartridge door hinge on the right side, and slide

the print cartridge door toward the left to remove it.

Figure 35. Removing the print cartridge door (2 of 2)

To reinstall

Lift the print cartridge door hinge above the stop (callout 2). Otherwise, the print cartridge door will not close.

80 Chapter 5 - Removal and replacement ENWW

Front guide assembly

1 Remove the left side cover (see “Left side cover” on page 69).

2 Remove the back cover (see “Back cover” on page 70).

3 Remove the right side cover (see “Right side cover” on page 72).

4 Remove the top cover (see “Top cover” on page 75).

5 Remove the control panel assembly (see “Control panel

assembly” on page 76).

6 Remove the front cover (see “Front cover assembly” on page 77).

7 Remove the print cartridge door (see “Print cartridge door” on

page 79).

8 From the front of the printer, remove two screws (callout 1).

Figure 36. Removing the front guide assembly (1 of 3)

ENWW Covers 81

9 On the right side, release the lower tab (callout 2) and the upper

tab (callout 3).

Figure 37. Removing the front guide assembly (2 of 3)

82 Chapter 5 - Removal and replacement ENWW

10 On the left side, release the upper tab (callout 4) and the lower

tab (callout 5).

11 Remove the front guide assembly.

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

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Internal assemblies

Transfer roller

The transfer roller is extremely difficult to remove. Before proceeding, make sure it is absolutely necessary to remove the roller. For instructions on removing the entire transfer roller assembly, see step 9 of “Paper-feed roller” on page 121.

CAUTION Do not touch the black sponge portion of the transfer roller.

1 Open the print cartridge door and remove the print cartridge (see

“Print cartridge” on page 64).

2 Use needle nose pliers to gently squeeze the two small tabs on

the transfer roller.

3 Lift the transfer roller up, slide it to the right, and lift it out of the

printer.

Note Do not misplace the small grounding spring that is underneath the right

side of the transfer roller.

Figure 39. Removing the transfer roller

84 Chapter 5 - Removal and replacement ENWW

Formatter (hp LaserJet 1300 series)

1 Remove the left side cover (see “Left side cover” on page 69).

2 Disconnect the two flat flexible cables (callout 1) on the formatter.

3 Disconnect the two connectors (callout 2) at the top of the

formatter.

4 Disconnect the control panel cable (callout 3).

Figure 40. Removing the HP LaserJet 1300 series formatter (1 of 2)

ENWW Internal assemblies 85

5 Remove six screws (callout 4).

6 Rotate the formatter up and off of the hooks on the chassis and

remove it from the printer.

7 Disconnect and remove the ESD shield from the formatter.

Figure 41. Removing the HP LaserJet 1300 series formatter (2 of 2)

Note When reinstalling the formatter, be sure to route the control panel wire

and the flat ribbon cable that connects the laser/scanner assembly so they do not interfere with the motion of the print cartridge door mechanisms as the door is opened and closed.

86 Chapter 5 - Removal and replacement ENWW

HP LaserJet 1150, LaserJet 1300, LaserJet 1300N Schematic

Specifications and Main Features

Frequently Asked Questions

User Manual

Contents

Figures

Tables

Product information

Chapter contents

Introduction

Hardware description

Product specifications

Model and serial numbers

Overview of printer

Front and side view

Back and side view

Warranty statement

Extended warranty

Limited warranty for print cartridge life

Print cartridge information

Print cartridge date stamp

HP LaserJet printing supplies

HP printing supplies returns and recycling program information

Material safety data sheet

Chapter contents

Operating environment

Identifying printer components

Printer control panel

Control panel light patterns

Selecting media

Loading media

Printer output paths

Maintenance

Chapter contents

Life expectancies of components

User-replaceable parts

Replacing the printer pickup roller

Replacing the printer separation pad

Cleaning the equipment

Cleaning the print path

Cleaning the print cartridge area

Cleaning the printer pickup roller

Cleaning the printer separation pad

Operational overview

Chapter contents

Basic functions

Formatter system

Control panel

EconoMode

Enhanced I/O

PJL overview

Printer functions

Engine control unit/power system

Image formation system

Printer paper-feed system

Jam detection

Chapter contents

Removal and replacement strategy

Required tools

Before performing service

Print cartridge

Parts removal order

Differences between the printers

Locating the printer differences

Covers

Left side cover

Back cover

Right side cover

Top cover

Control panel assembly

Front cover assembly

Internal assemblies

Transfer roller

Formatter (hp LaserJet 1300 series)