HP LaserJet 5L, 6L, 6L Gold, 6L Pro Service Manual

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LaserJet 5L/6L/6L Gold/6L Pro

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Service Manual

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HP LaserJet 5L/6L/6L Gold/6L Pro Printer

Service Manual _____________

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

Part number: C8060-90903 Second Edition, February 2002

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 IMPLI ED WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

Hewlett-Packard shall not be liable for any direct, indirect, incidental, consequential, or other damage alleged in connection with the furnishing or use of this information.

Trademark Credits

ENERGY STAR is a U.S. registered service mark of the United States Environmental Protection Agency.

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

Conventions

This is a combined Service Manual for the HP LaserJet 5L, 6L, 6L Gold, and 6L Pro printers. The HP LaserJet 6L Gold shares the same characteristics as the HP LaserJet 6L. For the purposes of this manual, the “HP LaserJet 6L” refers to both the 6L and the 6L Gold.

This manual uses the following conventions:

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

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

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

Note Notes contain important information set off from the text.

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

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

EN 3

4 EN

1 Product information

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

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

Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

HP LaserJet 6L Gold. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Model and serial . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Product overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Service approach . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Parts Exchange Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Ordering parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Ordering related documentation . . . . . . . . . . . . . . . . . . . . . . . . 22

Contacting HP to place an order . . . . . . . . . . . . . . . . . . . . . . . 22

Technical assistance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

HP Customer Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

HP worldwide sales and service offices . . . . . . . . . . . . . . . . . . 25

Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Hardware service during the warranty period. . . . . . . . . . . . . . 28

Hardware service after the warranty period . . . . . . . . . . . . . . . 28

HP LaserJet Toner Cartridge warranty. . . . . . . . . . . . . . . . . . . 29

Voltage conversions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

2 Site requirements

Chapter contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Site requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Operating environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Printer space requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

The HP C3906A/F Toner Cartridge. . . . . . . . . . . . . . . . . . . . . . . . . 34

Storage conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Storing opened toner cartridges . . . . . . . . . . . . . . . . . . . . . . . . 34

Toner cartridge handling suggestions . . . . . . . . . . . . . . . . . . . 35

3 Operating overview

Chapter contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Using the Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Control Panel layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Indicator lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

The Control Panel Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Printing a self-test page. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Continuous self test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Printing an engine test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Resetting the printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

To reset the printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Contents 5

4 Printer maintenance

Chapter contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47

Life expectancy of consumables . . . . . . . . . . . . . . . . . . . . . . . . . . .48

Toner cartridge life . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49

Saving toner with EconoMode . . . . . . . . . . . . . . . . . . . . . . . . .49

Refilled toner cartridges. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50

Recycling toner cartridges . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50

Cleaning the printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51

Cleaning printer components. . . . . . . . . . . . . . . . . . . . . . . . . . .51

Cleaning spilled toner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52

5 Functional overview

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

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

DC Controller/power system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55

Print engine control system . . . . . . . . . . . . . . . . . . . . . . . . . . . .56

Power system (on DC Controller PCA) . . . . . . . . . . . . . . . . . . .56

Formatter system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58

CPU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58

Read only memory (ROM) . . . . . . . . . . . . . . . . . . . . . . . . . . . .58

Random access memory (RAM) . . . . . . . . . . . . . . . . . . . . . . . .58

Parallel interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58

Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58

Resolution Enhancement technology (REt) . . . . . . . . . . . . . . . .59

EconoMode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59

Memory Enhancement technology (MEt). . . . . . . . . . . . . . . . . .59

Enhanced I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59

Page Protect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60

PJL overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60

Image formation system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61

Toner cartridge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61

Step 1: Drum cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62

Step 2: Drum conditioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62

Step 3: Image writing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62

Step 4: Image developing . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62

Step 5: Image transferring . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62

Step 6: Image fusing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62

Paper feed system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63

Paper jam detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65

Basic sequence of operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66

6 Removal and replacement

Chapter contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69

Removal and replacement strategy . . . . . . . . . . . . . . . . . . . . . . . . .70

Required tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71

Installing memory cards (DRAM) . . . . . . . . . . . . . . . . . . . . . . . . . . .72

Covers and doors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73

Back Cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73

EP Door Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75

Memory Door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76

Main Cover and Paper Input Assembly . . . . . . . . . . . . . . . . . . .77

Internal assemblies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78

Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78

Exit Roller Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .79

Delivery Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80

Fuser Pressure Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82

Heating Element. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .84

6 EN

Pressure Roller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

Face-Up/Face-Down Lever. . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

Fuser Exit Roller Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

Paper Exit Sensor Flag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

Top assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

Laser/Scanner Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

Solenoid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

Pickup Roller Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

Paper Feed Frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

Transfer Roller Guide and Transfer Roller . . . . . . . . . . . . . . . 101

Kick Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

Separation Pad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

Subpads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

Feed Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

Bottom assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

Memory Door Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

Motor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

DC Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

Formatter PCA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

7 Troubleshooting

Chapter contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

General troubleshooting flowchart. . . . . . . . . . . . . . . . . . . . . . . . . 116

Paper path and components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

DC Controller diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

Printer error troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

Priority of errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

Printer status messages . . . . . . . . . . . . . . . . . . . . . . . . . . . 121

Service and error messages . . . . . . . . . . . . . . . . . . . . . . . . . 123

Image formation troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . 126

Check the toner cartridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126

Image defect examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127

Troubleshooting checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133

Engine test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133

Half self-test functional check. . . . . . . . . . . . . . . . . . . . . . . . . 134

Drum rotation functional check . . . . . . . . . . . . . . . . . . . . . . . . 134

High-voltage power supply check. . . . . . . . . . . . . . . . . . . . . . 135

Paper curl . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137

Troubleshooting tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138

Paper path check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138

Repetitive image defect ruler . . . . . . . . . . . . . . . . . . . . . . . . . 139

Main wiring diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140

8 Parts and diagrams

Chapter contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143

How to use the part lists and diagrams . . . . . . . . . . . . . . . . . . . . . 144

Ordering parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144

Ordering consumables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144

Accessories and supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145

Common hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146

Parts diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147

Appendix A Parts index

Alphabetical parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167

Numerical parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172

EN 7

Appendix B Regulatory information

Laser Safety (U.S.). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .177

Laser Statement (Finland) . . . . . . . . . . . . . . . . . . . . . . . . . . . .178

Toner safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .179

Ozone emission . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .179

FCC Statement (Class B). . . . . . . . . . . . . . . . . . . . . . . . . . . . .180

VCCI Statement (Japan) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .180

8 EN

Figures

Figure 1-1 HP LaserJet 5L model and serial numbers . . . . . . . . . . . . . . . . . . . . . . 15

Figure 1-2 HP LaserJet 6L model and serial numbers . . . . . . . . . . . . . . . . . . . . . . 16

Figure 1-3 HP LaserJet 6L Pro model and serial numbers . . . . . . . . . . . . . . . . . . . 17

Figure 1-4 Front/side views of the printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Figure 1-5 Front door assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Figure 1-6 Back view of the printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Figure 2-1 Printer space requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Figure 2-2 Toner cartridge distribution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Figure 3-1 Self-test page for HP LaserJet 5L . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Figure 3-2 Self-test page for HP LaserJet 6L . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Figure 3-3 Self-test page for HP LaserJet 6L Pro . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Figure 3-4 Engine test button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Figure 4-1 Five percent text coverage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Figure 4-2 Static Eliminator Teeth (located in front of the transfer roller) . . . . . . . . 52

Figure 5-1 Printer functional block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Figure 5-2 DC Controller loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Figure 5-3 EconoMode vs. Normal Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Figure 5-4 Image formation block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Figure 5-5 Simplified paper path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Figure 5-6 Solenoid and sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Figure 5-7 General timing diagram - HP LaserJet 5L . . . . . . . . . . . . . . . . . . . . . . . 67

Figure 5-8 General timing diagram - HP LaserJet 6L and HP LaserJet 6L ProSL . 68

Figure 6-1 Phillips and PosiDriv screwdrivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Figure 6-2 Back Cover removal (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

Figure 6-3 Back Cover removal (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

Figure 6-4 EP Door Assembly removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Figure 6-5 Memory Door removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Figure 6-6 Main Cover and Paper Input Assembly removal . . . . . . . . . . . . . . . . . . 77

Figure 6-7 Control Panel removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

Figure 6-8 Exit Roller removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

Figure 6-9 Delivery Assembly removal (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Figure 6-10 Delivery Assembly removal (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

Figure 6-11 Fuser Pressure Plate removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Figure 6-12 Fuser Pressure Plate replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Figure 6-13 Heating Element removal (1 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

Figure 6-14 Heating Element removal (2 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

Figure 6-15 Heating Element removal (3 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

Figure 6-16 Pressure Roller Guide removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

Figure 6-17 Face-Up/Face-Down Lever replacement . . . . . . . . . . . . . . . . . . . . . . . . 88

Figure 6-18 Fuser Exit Roller removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

Figure 6-19 Paper Exit Sensor Flag replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

Figure 6-20 Laser/Scanner Assembly removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

Figure 6-21 Solenoid removal (1 of 2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

Figure 6-22 Solenoid removal (2 of 2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

Figure 6-23 Pickup Roller Assembly removal (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . 94

Figure 6-24 Pickup Roller Assembly removal (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . 95

Figure 6-25 Paper Pickup Roller Assembly replacement (inside/front view) . . . . . . 96

Figure 6-26 Paper Feed Frame removal (1 of 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

Figure 6-27 Paper Feed Frame removal (2 of 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

Figure 6-28 Paper Feed Frame removal (3 of 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

Figure 6-29 Paper Feed Frame removal (4 of 4) . . . . . . . . . . . . . . . . . . . . . . . . . . 100

Figure 6-30 Transfer Roller Guide and Transfer Roller removal (inside/back view) 101

Contents 9

Figure 6-31 Kick Plate removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .102

Figure 6-32 Kick Plate Spring replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .103

Figure 6-33 Separation Pad removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .104

Figure 6-34 Subpad removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .105

Figure 6-35 Feed Assembly removal (1 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .106

Figure 6-36 Feed Assembly removal (2 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .107

Figure 6-37 Feed Assembly removal (3 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .108

Figure 6-38 Memory Door Guide removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .109

Figure 6-39 Motor removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .110

Figure 6-40 DC Controller removal (1 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .111

Figure 6-41 DC Controller removal (2 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .112

Figure 6-42 DC Controller removal (3 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .113

Figure 6-43 Formatter Board removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .114

Figure 7-1 Paper path and components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .118

Figure 7-2 DC Controller PCA components . . . . . . . . . . . . . . . . . . . . . . . . . . . . .119

Figure 7-3 Heating element resistance check . . . . . . . . . . . . . . . . . . . . . . . . . . . .124

Figure 7-4 Engine test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .133

Figure 7-5 Toner cartridge high-voltage connection points (1 of 2) . . . . . . . . . . . .135

Figure 7-6 Toner cartridge high-voltage connection points (2 of 2) . . . . . . . . . . . .136

Figure 7-7 Overriding PS204 and SW101 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .138

Figure 7-8 Repetitive image defect ruler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .139

Figure 7-9 Main wiring diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .140

Figure 8-1 Major assembly locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .147

Figure 8-2 Covers and doors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .148

Figure 8-3 Internal components (1 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .150

Figure 8-4 Internal components (2 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .152

Figure 8-5 Internal components (3 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .154

Figure 8-6 DC Controller/formatter and cables . . . . . . . . . . . . . . . . . . . . . . . . . . .156

Figure 8-7 Pickup Roller assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .158

Figure 8-8 Feed assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .160

Figure 8-9 Separation Guide assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .162

Figure 8-10 Delivery assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .164

Figure A-1 VCCI statement (Japan) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .180

10 EN

Tables

Table 1-1 Printer Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Table 1-2 Printer Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Table 1-3 Performance specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Table 1-4 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Table 1-5 Acoustic emissions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Table 1-6 Related documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Table 2-1 Environmental requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Table 2-2 Printer dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

Table 3-1 Indicator Lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

Table 3-2 Control Panel Button usage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Table 4-1 Life expectancy of consumables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48

Table 4-2 Cleaning printer components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Table 5-1 Solenoid and sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64

Table 5-2 Printer timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66

Table 7-1 Printer status messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121

Table 7-2 Unclearable error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .122

Table 7-3 Service and error messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

Table 7-3 Service and error messages (Continued 2 of 3) . . . . . . . . . . . . . . . . . . . . . . . .124

Table 7-3 Service and error messages (Continued 3of 3) . . . . . . . . . . . . . . . . . . . . . . . . .125

Table 7-4 High-voltage power supply check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .135

Table 7-5 Paper curl troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137

Table 7-6 Cable pinouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .141

Table 8-1 Accessories and supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145

Table 8-2 Common fasteners used in the printer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .146

Table 8-3 Covers and doors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149

Table 8-4 Internal components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .151

Table 8-5 Internal components (2 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153

Table 8-6 Internal components (3 of 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155

Table 8-7 DC Controller case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .157

Table 8-8 Pickup Roller assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .159

Table 8-9 Feed assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161

Table 8-10 Separation Guide assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .163

Table 8-11 Delivery assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165

Table A-1 Alphabetical parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .167

Table A-2 Numerical parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172

Contents 11

12 EN

1 Product infor mation

Chapter contents

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

Paper capacities and sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

HP LaserJet 6L Gold. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Model and serial . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Product overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Front/side views of the printer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Front door assemblies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

Back view of the printer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

Service approach . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

Parts Exchange Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Ordering parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

Ordering related documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

Technical assistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

HP Customer Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

HP worldwide sales and service offices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

Hardware service during the warranty period. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

Hardware service after the warranty period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

HP LaserJet Toner Cartridge warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

Voltage conversions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

EN Chapter contents 13

Printer features

Note All references in this manual to the HP LaserJet 6L printer also apply to the HP LaserJet 6L Gold

printer.

Table 1-1 Printer Features

Feature Description

Print Speed 4 ppm (HP LaserJet 5L); 6 ppm (HP LaserJet 6L/6L Gold and HP LaserJet

6L Pro)

Text and Graphics Resolution 300 or 600 dpi Printer Language Enhanced PCL 5 (or host-based on HP LaserJet 6L/6L Gold) Monthly Usage (pages) 4,000 pages (HP LaserJet 5L); 6,000 pages (HP LaserJet 6L/6L Gold) Memory:

Standard

5L and 6L/6L Gold = 1 MB RAM, 2 MB ROM

6L Pro = 4 MB RAM, 4 MB ROM

Maximum

Capacity Internal Typefaces 26 Scalable Typefaces Standard Interfaces IEEE-1284 parallel Power Control SleepMode Control Pane l 3 LEDs and 1 Control Panel Button EconoMode (toner saving) Yes

1. Print er memor y is optimized with Memory Enhan cement technology (MEt).

2. Not available for the HP LaserJet 6L Pro, 4 MB standard.

3. JEDI A (Japanese Electronic Device Industry Association) is a group of DRAM suppliers who have standardized DRAM and other CMOS products.

5L and 6L/6L Gold = 9 MB total (available in increments of 1, 2, 4, and 8

MB) 5 V JEDIA card

Paper capacities and sizes

Table 1-2 Printer Features

Feature Description

Paper Input Tray Capacity Holds up to 100 sheets of regular weight paper or up to 10 envelopes Paper Output Bin Capacity Holds up to 100 sheets Single Sheet Input Slot 1 Minimum Paper Size 76 mm by 127 mm (3 by 5 inches) Maximum Paper Size 216 mm by 356 mm (8.5 by 14 inches)

14 Product information EN

Identification

HP LaserJet 6L Gold

The HP LaserJet 6L Gold shares the same characteristics as the HP LaserJet 6L. For the purposes this manual, “HP LaserJet 6L” refers to both the 6L and the 6L Gold.

Model and serial

The model number and serial numbers are listed on Identification Labels located on the bottom of the printer. The model number is alphanumeric, such as C3941A for the HP LaserJet 5L printer, C3990A for the HP LaserJet 6L printer, and C8060A for the HP LaserJet 6L Pro printer.

The serial number contains information about the Country of Origin, the Revision Level, the Production Code, and production number of the printer.

The labels also contain power rating and regulatory information.

Figure 1-1 HP LaserJet 5L model and serial numbers

EN Identification 15

Figure 1-2 HP LaserJet 6L model and serial numbers

16 Product information EN

Figure 1-3 HP LaserJet 6L Pro model and serial numbers

EN Identification 17

Specifications

Table 1-3 Performance specifications

Category Specification

Print Speed1: HP LaserJet 5L Print Speed: HP LaserJet 6L Print Speed: HP LaserJet 6L Pro

Monthly Usage (Duty Cycle): HP LaserJet 5L Monthly Usage (Duty Cycle): HP LaserJet 6L Monthly Usage (Duty Cycle): HP LaserJet 6L Pro

Life Expectancy of Toner Cartridge (pages) First Print

HP LaserJet 5L

HP LaserJet 6L

HP LaserJet 6L Pro

1. Actual speed depends on data complexity and software handling efficiency.

2. T oner Cartridge life can be extended by using EconoMode.

4 ppm 6 ppm 6 ppm

4,000 pages 6,000 pages 6,000 pages

2,500 pages at 5% coverage

A4: <23 seconds Letter: <23 seconds

A4: 18 seconds Letter: 18 seconds

Table 1-4 Electrical specifications

Volts Frequency Amps Watts (typical)

120 Vac ± 10% 100 Vac ± 10%

220 Vac ± 10% 240 Vac ± 10%

1. Minimum recommended circuit capacity for product.

2. HP LaserJet 6L Pro operates at 220/240 Volts only.

50/60 Hz ± 2 Hz 50/60 Hz ± 2 Hz

50 Hz ± 2 Hz 50 Hz ± 2 Hz

3.5 @ 120v

1.8 @ 230v Printing = 100 (5L) 150 (6L) 150 (6L Pro)

Printing = 100 (5L) 150 (6L) 150 (6L Pro) SleepMode = 6 (5L) 4 (6L) 4 (6L Pro)

SleepMode = 6 (5L) 4 (6L) 4 (6L Pro)

Table 1-5 Acoustic emissions

During Printing 5.6 Bels Sound Power Level (per ISO 9296) During Standby & SleepMode Silent

18 Product information EN

Product overview

Figure 1-4 Front/side views of the printer

1 Paper Input Support (not present on the HP LaserJet 6L Pro) 2 Paper Output Support (not present on the HP LaserJet 6L Pro) 3 Paper Guides

4 Error (top) Indicator Light 5 Data (middle) Indicator Light 6 Ready (bottom) Indicator Light 7 Control Panel Button 8 Pa per Output Bin 9 Paper Path Lever 10 Serial and Model Number (under printer) 11 Paper Input Tray 12 Single Sheet Input Slot 13 Front Output Slot (face-up)

EN Product overview 19

Figure 1-5 Front door assemblies

14 Paper Release Lever 15 Toner Cartridge Compar tm ent 16 Transfer Roller (do not touch) 17 EP Door

20 Product information EN

Figure 1-6 Back view of the printer

18 Power Cable Connector 19 Parallel Cable Connector 20 Memory Expansion Cover (not present on the HP LaserJet 6L Pro)

2019

EN Product overview 21

Service approach

Repair of the printer normally begins with the use of the printer’s internal diagnostics in conjunction with the troubleshooting procedures in Chapter 7. Once a faulty part is located, repair is generally accomplished by assembly level replacement of Field Replaceable Units (FRUs). Some mechanical assemblies may be repaired at the subassembly level. PCA component replacement is not supported by Hewlett-Packard. Part numbers for all FRUs are located in Chapter 8 of this manual.

Parts Exchange Program

HP offers remanufactured assemblies for some selected parts. These are identified in Chapter 8 and can be ordered through HP’s

Commercial Service and Support Organization-Europe (CSSO-E)

Ordering parts

Field replaceable part numbers are listed in Chapter 8 of this manual. Replacement parts may be ordered from HP's Commercial Service and Support Organization-Americas (CSSO-A), or Commercial Service and Support Organization-Europe (CSSO-E).

Ordering related documentation

Table 1-6 on the following page lists part numbers and where to order related documentation.

Commercial Service and Support Organization-Americas (CSSO-A), or

Contacting HP to place an order

To order parts or related documentation, contact one of the following HP support organizations:

l CSSO-A (Commercial Service and Support Organization-Americas)

(800) 227-8164 (U.S. Only)

l CSSO-E (Commercial Service and Support Organization-Europe)

(49 7031) 142253

Table 1-6 Related documentation

Description Part Number CSSO-A CSSO-E

HP LaserJet Family Quick Reference Service Guide 5021-0369 X X HP LaserJet 5L Printer User’s Ma n ual C3941-90901 X HP LaserJet 6L Printer User’s Ma n ual C3990-90901 X HP LaserJet 6L Pro Printer User’s Guide C8060-90901 HP PCL5 Printer Language Technical Reference Information

Package HP LaserJet Printer Family Paper Specifications Guide 5963-7863 X X LaserJet Basic Hardware Training Course 5961-0880 X X HP LaserJet 5L/6L/6L Gold/6L Pro Service and Support

Documentation and Training CD-ROM

5010-3994 X X

C8060-60102 (English)

C8060-60103 (Simplified Chinese)

22 Product information EN

Technical assistance

HP Customer Care

Along with your product, you receive a variety of support services from Hewlett-Packard and our support partners designed to give you the results you need, quickly and professionally.

Online Services: for 24hour access to information over your Internet connection, we suggest these services.

Obtaining Software Visit: http://www.hp.com/go/support/ (site is in English)

Australia: +61 3 8877 8000 China: +86 10 6564 5959 Argentina: (541) 778 8380 Mexico: 800-427-6684 Spain: +44 (0) 1429 520 012 Portugal: +44 (0) 1429 890 466 German: +44 (0) 1429 863 353 French (Europe): +44 (0) 1429 863 343 Italian: +44 (0) 1429 890 466 English: +44 (0) 1429 865 511 Canada and US: (661) 257 5565 Taiwan: +888 (2) 2717 0055 Korea: +82 (2) 3270 0805 Greece, Ireland, and the UK: +44 (0) 1429 865 511 Hong Kong SAR, Malaysia, and Singapore: +65 740 4477 India: (91) (11) 682 6035 New Zealand: +64 9 356 6640

HP Direct Ordering for Accessories and Supplies

(U.S. and Canada):

HP Support Assistant compact disc

(U.S., Canada, Singapore, Hong Kong SAR, Malaysia):

HP Service Information

(U.S. and Canada):

World Wide Web URL: For information specific to the HPLaserJet 5L/ 6L6L Gold/6L Pro products:

http://www.hp.com/go/support/ (site is in English)

Call:

Call (1) (800) 538-8787 (U.S.) or (1) (800) 387-3154 (Canada).

This support tool offers a comprehensive online information system designed to provide technical and product information on HP products. T o subscribe to this quarterly service in the U.S. or Canada, call (1) (800) 457-1762. In Hong Kong SAR, Malaysia, or Singapore, call Fulfill Plus at (65) 740-4477.

To locate HP-authorized dealers, call (1) (800) 243-9816 in the U.S. or (1) (800) 387-3154 in Canada.

EN T echnical assistance 23

Customer Care options worldwide

HP Customer Care and Product Repair Assistance for the U.S. and Canada:

Call (208) 323-2551 in the United States or (905) 206-4663 in Canada Monday through Friday 6 am to 10 pm and Saturday 9 am to 4 pm (Mountain Time) free of charge during the warranty period. However, your standard long-distance phone charges still apply. Have y our system nearby and your serial number ready when calling.

If you know your printer needs repair, call 1-800-243-9816 to locate your nearest HP-authorized service provider, or call 208-323-2551 for HP centralized service dispatch.

Post-warranty telephone assistance is available to answer your product questions. Call (1) (900) 555-1500 ($2.50* per minute, U.S. only) or call 1-800-999-1148 ($25* per call, Visa or MasterCard, U.S. and Canada) Monday through Friday from 7 am to 6 pm and Saturday from 9 am to 3 pm (Mountain Time).

Charges begin only when you connect with a support technician. *Prices subject to change.

European HP Customer Care and In-Country/Region Support

Open Monday through Friday 8:30-18:00 CET

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

Israel: +972 (0)9 9524848 Denmark: +45 39 29 4099 Sweden: +46 (0)8 619 2170 Spain: +34 902 321 123 Portugal: +351 21 3176333 Norway: +47 22 11 62 99 Italy: +39 02 264 10350 Austria: +43 (0) 7114 201080

Germany: +49 (180) 52 58 143 Belgium: +32 (0)2 626 8807

France: +33 (0)1 43 62 3434 Finland: +358 (0)203 47 288 Belgium: +32 (0)2 626 8806 (Dutch)

+32 (0)2 626 8807 (French)

Ireland: +353 (0)1 662 5525 U.K.: +44 (0)171 512 5202 Greece: +30 (0) 16196411

Switzerland: +41 (0)848 80 11 11 English in Europe +44 (0) 171 512 52 02

Switzerland: +41 (0)848 80 11 11

the Netherlands: +31 (0) 20 606 8751

English in other

European countries: +44 (0)171 512 52 02

Open Monday through Friday 8:00-19:00

If you require telephone support, call the number below. If you require additional product repair services, see “HP worldwide sales and service offices.”

Australia: (61) (3) 8877-8000 Hong Kong SAR: 800 96 7729 Malaysia: +60 3 295 2566

Taiwan: +886 (2) 2717 0055 Korea: (82) (2) 3270-0700 Argentina: (541) 778 8380 Mexico (Mexico City): 800-427-6684 Poland: +48 22 519 06 00 Russia and the Ukraine: +7 095 797 3520 (Moscow)

+7 812 346 7997 (St. Petersburg) +7 (380-44) 490-3520 (Ukraine)

China: +86 (0)10 6564 5959 Hong Kong SAR: 800 96 7729 Hungary: +365 (0)1 3821111

In-country/region support

New Zealand: +64 9 356 6640 Singapore: +65 272 5300

24 Product information EN

HP worldwide sales and service offices

Argentina Australia Austria

Hewlett-Packard Argentina Montañeses 2140 1428 Buenos Aires Phone: (54) (1) 787-7115 Fax: (54) (1) 787-7287

Hewlett-Packard Head office Hewlett-Packard Australia Ltd. 31-41 Joseph Street Blackburn, VIC 3130 Phone: (61) (3) 9272-2895 Fax: (61) (3) 898-7831

Service and Support Hewlett-Packard 351 Burwood Hwy Forest Hill VIC 3131 Phone: (61) (3) 8877-5786

Hewlett-Pack a rd GmbH Lieblgasse 1 A-1222 Vienna Phone: (43) (1) 25000-555 Fax: (43) (1) 25000-500

Belgium China Denmark

Hewlett-Packard Belgium S.A. NV Boulevard de la Woluwe-Woluwedal 100-102 B-1200 Brussels Phone: (32) (2) 778-31-11 Fax: (32) (2) 763-06-13

China Hewlett-Packard Co. Ltd. 9/F, HP Building No. 2 Dong San Huan Nan Lu Chao Yang District Beijing 100022, P.R. China Phone: (86 10) 6564 3888

Customer Information Center: Phone: (86 10) 6564-3888 or

(86 10) 6564-5959

Hewlett-Pack ard A/S Kongev ejen 25 DK-3460 Birkerød Denmark Phone: (45) 3929 4099 Fax: (45) 4281-5810

Finland France Germany

Hewlett-Packard Oy Piispankalliontie 17 FIN-02200 Espoo Phone: (358) (9) 887-21 Fax: (358) (9) 887-2477

Hewlett-Packard France 42 Quai du Point du Jour F-92659 Boulogne Cedex Phone: (33) (146) 10-1700 Fax: (33) (146) 10-1705

Hewlett-Pack a rd GmbH Herrenberger Strasse 130 71034 Böblingen Phone: (49) (0) 180 532-6222

(49) (0) 180 525-8143

Fax: (49) (0) 180 531-6122

Greece Hong Kong SAR Hungary

Hewlett-Packard Hellas 62 Kiffisias Av. Polis Center Maroussi 151 25 Athens Greece Phone: (30) (1) 619-6411 Fax: (30) (1) 619-6512

Hewlett-Packard Asia Pacific Ltd 25/F City Plaza One 1111 King’s Road, Taikoo Shing, Hong Kong SAR Phone; (8 52) 2599-7777 Fax: (8 52) 2506-9776

Hardware Repair Center: Phone: (8 52) 2599-7000

Extended Warranty Support: Phone: (8 52) 2599-7000

Customer Information Center: Phone: 8 52) 2599-7066

Hewlett-Packard Magyarország Kft. Neumann János u. 1 H-1111 Budapest Phone: (36) (1) 382-6666 Fax: (36) (1) 382-6777

Hardware Repair Center: Phone: (36) (1) 343-0312

Customer Information Center: Phone: (36) (1) 343-0310

EN T echnical assistance 25

India Indonesia Israel

Hewlett-Packard India Ltd. Chandiwala Estate Maa Anandmai Marg Kalkaji, New Delhi - 110019 Phone: (91 11) 682-6000,

(91 11) 682-6035

Fax: (91 11) 682-6030

Hardware Repair Center and Extended Warranty Support: Phone: (91 11) 682-6042

Customer Information Center: Phone: (91 11) 682-6000 or

(91 11) 682-6035

Hewlett-Packard Berca Servisindo Sentral Senayan 1, 8th floor Jl. Asia Afrika no. 8 Jakarta 10270 Indonesia Phone: (62 21) 350-3408

Hardware Repair Center and Extended Warranty Support: Phone: (62 21) 3483-4567 Fax: (62 21) 352-2048

Customer Information Center: Phone: (62 21) 550-5408

Hewlett-Packard Israel Ltd. 11, Hashlosha St. Tel Aviv 67060 Phone: (972) (3) 5 38 03 00 Fax: (972) (3) 5 38 03 51 Customer Care Center Phone: (972) (9) 9 52 48 48

Italy Korea México

Hewlett-Packard Italiana SpA Via Giuseppe di Vittorio, 9 Cernusco Sul Naviglio I-20063 (Milano) Phone: (39) (2) 921-21 Fax: (39) (2) 921-04473

Hewlett-Packard Korea, Ltd. HP Korea House, 23-6 Yoido-dong, Youngdeungpo-gu, Seoul 150-724, Korea Yoido P.O. Box 595 Phone: (82) (2)2199-0114

Hewlett-Pack ard de México, S.A. de C.V. Prolongación Reforma No. 700 Lomas de Santa Fe 01210 México, D.F. Phone: 01-800-22147 Outside Mexico City Phone: 01 800-90529

Middle-East Region Netherlands New Zealand

Hewlett-Packard Middle-East P.O.-Box 17295 Jebel Ali Free Zone Dubia, UAE Phone: (97) 14 88 15 456 Fax: (97) 14 88 14 529

Hewlett-Packard Nederland BV Startbaan 16 1187 XR Amstelveen Postbox 667 NL-1180 AR Amstelveen Phone: (31) (0) 20 547-6666 Fax: (31) (0) 20 547-7755

Hewlett-Packard (NZ) Limited Ports of Auckland Building Princes Wharf, Quay Street P.O. Box 3860 Auckland Phone: (64) (9) 356-6640 Fax: (64) (9) 356-6620

Hardware Repair Center and Extended Warranty Support: Phone: (64) (9) 0800-733547

Customer Information Center: Phone: (64) (9) 0800-651651

Norway Poland Portugal

Hewlett-Packard Norge A/S Postboks 60 Skøyen Drammensveien 169 N-0212 Oslo Phone: (47) 2273-5600 Fax: (47) 2273-5610

Hewlett-Packard Polska Al. Jerozolimskic 181 02-222 Warszawa Phone: (48-22) 608-7700 Fax: (48-22) 608-76-00

Hewlett-Packard Portugal Quinta da Fonte Edifico Bartolomeu Dias Porto Salvo 2780-667 Oeiras Portugal Phone: (351) (21) 4 82 85 00 Fax: (351) (21) 4 41 70 02

26 Product information EN

Russian Federation Singapore Spain

Hewlett-Packard Company Representative Office Kosmodamianskaya naberezhnaya 52, Building 1 113054 Moscow Phone: (7) (0) 95 797-3500 Fax: (7) (0) 95 797-3501

Hewlett-Packard Singapore (Service) Pte Ltd 438A Alexandra Road Blk A Alexandra Technopark #02-08 Singapore 119967 Phone: (65) 275-3888 Fax: (65) 273-1146

Extended Warranty Support: Phone: (65) 374-6441

Customer Information Center: Phone: (65) 272-5300

Hewlett-Pack ard Española, S.A. Carretera de la Coruña km 16.500 E-28230 Las Rozas, Madrid Phone: (34) 91-6311600 Fax: (34) 91-6311830

Sweden Switzerland Ukraine

Hewlett-Packard Sverige AB Skalholtsgatan 9 S-164 97 Kista Phone: (46) (8) 444-2000 Fax: (46) (8) 444-2666

Hewlett-Packard (Schweiz) AG In der Luberzen 29 CH-8902 Urdorf/Zürich Phone: (41) (0848) 88 44 66 Fax: (41) (1) 735 77 00

Extended Warranty Support: Phone: (41) (0848) 80 11 11

Hewlett-Packard Trading S.A. 14, Bekhterevskiy Pereulok, Block E 04053 Kiev Phone: (380) 44 490 61 20 Fax: (380) 44 490 61 21

United Kingdom

Hewlett-Packard Ltd. Cain Road Bracknell Berkshire RG12 1HN Phone: (44) (0) 8705 47 47 47

Fax: (44) (134) 436-3344

(44) (0) 207 512 5202

EN T echnical assistance 27

Warranty

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.

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 ex ecute its programming instructions due to such defects.

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

products may contain remanufactured parts equivalent to new in performance or may have been subject to incidental use. 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. Warranty does not apply to defects resulting from (a) improper or inadequate maintenance or calibration, (b) software, interfacing, parts or supplies not supplied by HP, (c) unauthorized modification or misuse, (d) operation outside of the published environmental specifications for the product, or (e) improper site preparation or maintenance.

4 ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR

PURPOSE IS LIMITED TO THE DURATION OF THE EXPRESS WARRANTY SET FORTH ABOVE. Some 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 state to state, province to province, or country to country.

5 THE REMEDIES IN THIS WARRANTY STATEMENT ARE YOUR SOLE AND EXCLUSIVE

REMEDIES. EXCEPT AS INDICATED ABOVE, IN NO EVENT WILL HP BE LIABLE FOR LOSS OF DATA OR FOR DIRECT, SPECIAL, INCIDENTAL, CONSEQUENTIAL (INCLUDING LOST PROFIT), OR OTHER DAMAGE, WHETHER BASED IN CONTRACT, TORT, OR OTHERWISE. Some 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.

Hardware service during the warranty period

If your hardware should fail during the warranty period, HP offers the following support options:

l HP Authorized Service Provider: You can return your printer to a local authorized service dealer. l HP Repair Services: You can return your printer to an HP repair office.

When sending equipment, we recommend insuring the equipment for shipment. Also include a copy of your proof of purchase.

CAUTION Shipping damage as a result of inadequate packaging is the customer’s responsibility . Use the original

packing materials whenever possible.

Hardware service afte r the warranty period

If your hardware fails after the warranty period, contact an authorized Hewlett-P ackard Dealer Repair Center or a designated Hewlett-Packard Repair Center. If you have a Hewlett-Packard Maintenance Agreement, request service under your agreement.

28 Product information EN

HP LaserJet Toner Cartridge warranty

HP LaserJet Toner Cartridges are warranted to be free from defects in materials and workmanship until the HP toner is depleted. You know your HP toner is depleted when you begin to see faded or light type on your printed page.

The warranty, extended for the life of the cartridge, covers any defects or malfunctions in your new Hewlett-Packard Toner Cartridge. HP will, at HP’s option, either replace products which prove to be defective or refund your purchase price.

In the event the cartridge proves to be defective, attach a printout sample illustrating what the defective cartridge is printing and return to the place of purchase. IN NO EVENT SHALL HEWLETTPACKARD COMPANY BE LIABLE FOR ANY INCIDENTAL CONSEQUENTIAL, SPECIAL, INDIRECT, PUNITIVE, OR EXEM PLARY DAMAGES OR LOS T PR OFIT S FR OM ANY BRE A C H OF THIS WARRANTY OR OTHERWISE.

Voltage conversions

HP LaserJet printers are manufactured to different specifications for different countries. Because of these differences, HP does not recommend transporting products sold within one country to another country.

In addition to the 115-220 voltage environment concerns, the country of final destination may have different import and export restrictions, power frequencies, and regulatory requirements.

Note The HP LaserJet family printers must be serviced by an authorized repair depot or reseller within the

country where the printer was originally purchased. Because of the different specifications and warranty coverage limitations, Hewlett-Packard does not

offer a conversion, or support the conversion, of HP LaserJet family printers. We advise those customers planning to transport equipment to different countries to purchase the products in the country of final destination.

EN Warranty 29

30 Product information EN

2 Site requirements

Chapter contents

Site requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32

Operating environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32

Printer space requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

The HP C3906A/F Toner Cartridge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Storage conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

Storing opened toner cartridges. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

Toner cartridge handling suggestions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

EN Chapter contents 31

Site requirements

Operating environment

The environmental requirements listed in the table below must be maintained to ensure the proper operation of this printer.

Table 2-1 Environmental requirements

LaserJet 5L/6L/6L Pro & Cartridge Operating Storage

Temperature 50 to 90.5° F (10 to 32.5° C) 32 to 104° F (0 to 40° C) Humidity 20 to 80% RH

(with no condensation)

10 to 80% RH (with no condensation)

Consider the following points before installing the printer:

l Install in a well-ventilated, dust-free area. l Install on a hard, flat and continuous surface, with all four printer feet level. Do not install on

carpet or other soft surfaces.

l Ensure adequate power is supplied. Printer power requirements are listed under

“Specifications” in Chapter 1. Uninterruptible power supplies (UPS) should not be used with this printer.

l Install away from direct sunlight, open flames, or ammonia fumes. If the printer is placed near

a window, make sure the window has a curtain or blind to block any direct sunlight.

l Install with enough space around the printer for proper access and ventilation.

(See Figure 2-1.)

l Install pr inter away from the direct flow of exhaust from air ventilation systems.

32 Site requirements EN

Printer space requirements

Legal (paper guide not present on HP LaserJet 6L Pro)

Letter

445.3 mm

327.5 mm

Figure 2-1 Printer space requirements

227.5 mm

311.2 mm 335.5 mm

Table 2-2 Printer dimensions

Description Dimension

Width 335.5 mm (13.2 inches) Depth 311.2 mm (12.3 inches) Height

(storage) (operational)

Weight (with toner cartridge) 7.2 kg (15. 9 pounds) Toner Cartridge weight

1. With Letter Input Assembly extended.

2. Some quantity of toner will reside in the waste toner area of a Toner Cartridge when the toner supply is exhausted. Therefore, using toner cartridge weight may be an unreliable indication of remaining toner supply.

227.5 mm (8.9 inches)

372.7 mm (14.6 inches)

0.7 kg (1.5 pounds)

EN Printer space requirements 33

The HP C3906A/F Toner Cartridge

Toner Cartridges contain components that are sensitive to light, temperature, and humidity. Follow the recommendations in this section to ensure the highest quality and longest life of HP Toner Cartridges.

Keep the printer within the following environmental conditions for optimum performance.

Storage conditions

The Toner Cartridge is affected by its environment. Packaging protects the Toner Cartridge from light and increases its storage life. It is important to store the cartridge in its original packaging until the cartridge is ready to be installed in the printer.

When storing the Toner Cartridge in a warehouse or work area, make sure the storage place meets the conditions specified in Table 2-1.

Storing opened toner cartridges

Because the cartridge does not have a shutter to cover the laser beam access slot, it should be kept inside the printer until empty. Toner Cartridges that have had the toner sealing tape removed are also more vulnerable to environmental extremes (such as high humidity).

If the toner cartridge must be removed from the printer, always store the cartridge:

l Inside the protective bag in which it was originally packaged. l In a dark cabinet, away from direct sunlight. l Correct side up and in a horizontal position (not standing on end). l At a temperature between 32° to 104° F (0° and 40° C). l Away from ammonia or other organic solvent fumes.

CAUTION Never ship the printer with a T oner Cartridge installed. Excessive vibration during shipping can cause

toner to leak, contaminating the printer . Never expose the Toner Cartridge to direct sunlight or to room light for more than a few minutes. Bright light and direct sunlight can permanently damage a Toner Cartridge.

Note The C3906F Toner Cartridge is designed specifically for use in the environmental conditions of the

Asia Pacific region and is only available in that region.

34 Site requirements EN

Toner car tri dg e handl ing suggestio ns

l Before installing a cartridge, distribute the toner evenly by rotating the cartridge back and forth

five to six times. (See Figure 2-2.) Repeat this action when toner begins to run low.

Figure 2-2 Toner cartridge distribution

l Do not touch the surface of the Photosensitive Drum in the cartridge. Protect the drum from light

and contamination.

l Do not expose the cartridge to unnecessary vibrations or shock. l Do not expose the Photosensitive Drum to strong light. Blurred areas on the page may indicate

that the drum has been exposed to light for too long. This causes permanent damage to the Photosensitive Drum. Replace the cartridge.

l Never manually rotate the drum, especially in the reverse directions; internal damage and toner

spills may result.

l Remove the Toner Cartridge before shipping the printer.

EN The HP C3906A/F T oner Cartridge 35

36 Site requirements EN

3 Operating overview

Chapter contents

Using the Control Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Control Panel layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

Indicator lights. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

The Control Panel Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40

Printing a self-test page. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

Continuous self test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44

Printing an engine test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44

Resetting the printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

To reset the printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45

EN Chapter contents 37

Using the Control Panel

Control Panel layout

The Control Panel is located on the front of the printer and consists of one button and three indicator lights.

ERROR (Amber) DATA (Green) READY (Green)

These lights can be in only one of the following states:

OFF ON Blinking

Indicator lights

The Indicator Lights provide a quick way to check the printer’s status.

Table 3-1 Indicator Lights (1 of 2)

When this indicator: Looks

It means this: D o this:

like this:

No lights are on or blinking

Blinking

Data Light and Ready Light both remain on

The printer is in SleepMode or has been disconnected.

The printer is ready to print.

Print job in progress.

Unprinted data are in the printer.

If you want to print, press and release the Control Panel Button or send the print job. If no response, check the power cord.

No action is necessary. However, you can print a test page by pressing and releasing the Control Panel button.

Let job finish printing.

Press and release the Control Panel Button to print the remaining data. See “Service and error messages” in Chapter 7.

38 Operating overview EN

Table 3-1 Indicator Lights (Continued) (2 of 2)

When this indicator: Looks

like this:

Data Light is blinking

Error Light remains on

Error Light is blinking

It means this: D o this:

Printer is in Manual Feed mode.

Printer is out of paper.

Printer’s EP door is open.

Printer has a paper jam.

Toner Cartridge is either missing or not installed correctly.

The page may have too much data or may be too complex for the printer’s memory capacity.

Make sure that the correct paper is loaded. Then, press and release the Control Panel Button to print.

Add paper.

Close the door.

Clear the jam and resume printing.

Install a cartridge, being careful to position it correctly.

NOTE: The HP LaserJet 6L Pro has no mechanism for detecting the presence of a Toner Cartridge. If the Toner Cartridge is missing, the Error Light will remain off. Printing without a Toner Cartridge installed may cause a paper jam.

If the Error Light remains lit after checking for these problems, and there’s no paper jam, disconnect the power for 10 seconds, then reconnect to the power source. If, after taking these actions, the light remains on, refer to Chapter 7, “Troubleshooting.”

Press and release the Control Panel Button to continue printing. There may be some data loss on the page.

Hint: To avoid this in the future:

All lights remain onPrinter is indicating either

All lights are blinking

an internal problem or a fatal error.

Printer is initializing or resetting (6L Pro)

Memory card may be slower than 70 nsec (5L/6L)

1. See your printer driver help for more suggestions regarding printer memory usage.

2. Reduce resolution to 300 dpi with your software.

3. Install additional printer memory. (See Chapter 6 for information on installing additional memory.)

1. If you have added an additional memory card, try removing it.

2. Disconnect the power for 10 seconds, then reconnect it.

3. If all of the lights come on steadily again, try disconnecting the power for 15 minutes.

If this error remains after completing the tasks above, see Chapter 7, “Troubleshooting.”

No action is necessary.

See Chapter 7, “Troubleshooting.”

EN Using the Control Panel 39

The Control Panel Button

Depending on what state the printer is in, pressing the Control Panel Button allows you to control printing tasks by either starting or resuming a printer function. Use the Control Panel Button to accomplish the following tasks:

Table 3-2 Control Panel Button usage

Function Lights Action Result

Wake Up All lights are off while

plugged into power source

Self Test Ready (bottom) Light is on

and the other lights are off.

Printer Reset The Ready (bottom) Light

will remain lit, if there are no printer errors.

Resume (from Manual Feed)

Continue (from memory error)

Form Feed The Data (middle) Light and

The Data (middle) Light blinks.

Error (top) Light blinks. Briefly push and release the

the Ready (bottom) Light both remain on.

Briefly push and releas e the button.

Press and hold the button until the three Front Panel Lights blink quickly in succession.

Briefly push and releas e the button.

button.

Briefly push and releas e the button.

The printer will w ake up to a ready state.

Prints a self-test page.

The reset will return the printer to the factory default settings. This clea rs all dat a from memory, including any downloaded fonts and macros.

Override manual feed to print from paper cassette.

Allows the printer to reco v e r and continue printing the job.

The remaining data in printer memory will print.

40 Operating overview EN

Printing a self-test page

A self-test page can be useful in troubleshooting printer problems and determining which fonts have been downloaded to the printer.

Figure 3-1 Self-test page for HP LaserJet 5L

EN Printing a self-test page 41

Figure 3-2 Self-test page for HP LaserJet 6L

42 Operating overview EN

Figure 3-3 Self-test page for HP LaserJet 6L Pro

The self-test page lists the current printer configuration. (If any fonts have been downloaded to the printer a second page will print.)

To print a self-test page: 1 Make sure the Ready (bottom) Light is on, and all other lights are off. Wake up the printer if

necessary by pressing the Control Panel Button.

2 Briefly press and release the Control Panel Button. The Data (middle) Light comes on, the

Ready (bottom) Light blinks. Wait for a self-test page to print.

EN Printing a self-test page 43

Continuous self test

Note The HP LaserJet 6L Pro does not support the continuous self test.

A continuous self test can be useful for troubleshooting paper path and other problems. To print a continuous self test:

1 Disconnect the printer from the power source. 2 Press and hold down the Control Panel Button while connecting power. 3 Continue holding the button for about five seconds.

All lights will illuminate at once, then each will light in sequence.

4 Release the button. The printer conducts its internal diagnostics routine, then prints the self-test

page continuously until stopped.

5 To stop the continuous self test (and reset the printer), press and hold the Control Panel Button

for a few seconds until all lights begin lighting in sequence once again.

Note The self test does not print at the printer’s rated speed of 4 ppm (HP LaserJet 5L) or 6 ppm

(HP LaserJet 6L). The engine test prints at the printer’s rated speed.

Printing an engine test

The engine test print can be used to verify that the print engine is functioning correctly. The Formatter PCA is completely bypassed during an engine test. Consequently, this test is useful for isolating engine printer problems. For the HP LaserJet 5L and 6L printers, the engine test prints a full page of vertical lines down the entire printable area. For the HP LaserJet 6L Pro, the engine test prints a full page of horizontal lines across the entire printable area. These engine test pages are useful for checking and adjusting registration.

Note Perform the engine test with the printer covers in place, as shown in Figure 3-6. Refer to “Engine T est”

in Chapter 7 for the engine test procedure.

Engine test printout

(5L/6L)

(6L Pro)

Engine test buttonEngine test printout

Figure 3-4 Engine test button

44 Operating overview EN

Resetting the printer

Resetting the printer accomplishes the following:

l Clears all data from the printer’s memory (including unprinted data, downloaded fonts, and

macros).

l Stops any printing that is taking place and ejects the page. l Removes some error conditions. l Resets the printer to its factory default settings.

To reset the printer

Press and hold the Control Panel Button until the three Control Panel Lights blink quickly in succession (about five seconds), then let go of the button. After resetting, the Ready Light will remain lit if there are no printer errors. (Make sure there is paper in the printer or the Error Light will remain lit.)

EN Resetting the printer 45

46 Operating overview EN

4 Printer maintenance

Chapter contents

Life expectancy of consumables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48

Toner cartridge life. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Saving toner with EconoMode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49

Refilled toner cartridges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50

Recycling toner cartridges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50

Cleaning the printer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Cleaning printer components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51

Cleaning spilled toner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

EN Chapter contents 47

Life expectancy of consumables

Always inspect the components listed in Table 4-1 for wear when servicing the printer. Replace these components as needed, based on printer failures or wear, not strictly on usage.

Table 4-1 Life expectancy of consumables

Description Estimated Life

Remarks

(pages)

Toner cartridge (user replaceable) 2,500

Transfer roller 50,000 May affect print quality and/or paper

Paper pickup assembly 50,000 Look for glazing and/or cracks. Separation pad and sub pads 50,000 May affect paper movement. Heating Element 100-120 V, 50/60 Hz

220-240 V, 50 Hz

Pressure Roller

1. The estimated toner cartridge life is based on Letter or A4 size paper with an average of five percent toner coverage and a medium density setting. Toner cartridge life can be extended further by conserving toner using the printer’s EconoMode feature.

50,000 May affect print quality and/or paper

When print becomes faint, shake cartridge to distribute remaining toner.

movement.

movement. Look for marks on pressure roller or upper Teflon sleeve.

48 Printer maintenance EN

Toner cartridge life

The toner cartridge has been designed to simplify the replacement of the printer’s major parts. The toner cartridge contains the printing mechanism and a supply of toner. When using a typical wordprocessing application, a toner cartridge will print approximately 2500 pages where the text covers about five percent of the page.

Figure 4-1 Five percent text coverage

When regularly printing pages with less coverage, such as short memos, a toner cartridge should print over 2,500 pages. However, if routinely printing very dense print, the cartridge will not print a full 2,500 pages.

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

box.

Saving toner with EconoMode

Toner cartridge life can be extended dramatically by using the EconoMode printing feature of the printer. EconoMode uses approximately 50 percent less toner than normal printing. The printed page is much lighter and is adequate for printing drafts or proofs. EconoMode can be set through your printer driver. See Chapter 5 for more information.

Note Some software applications may refer to this as “draft mode.”

EN T oner cartridge life 49

Refilled toner cartridges

While Hewlett-Packard does not prohibit the use of refilled toner cartridges during the warranty period or while under a maintenance contract, we do not recommend their use. The reasons for this are:

l Hewlett-Packard has no control or process to ensure that a refilled toner cartridge functions at

the high level of reliability of a new HP LaserJet toner cartridge.

l Hewlett-Packard also cannot predict what the long-term reliability effect on the printer is from

using different toner formulations found in refilled cartridges.

l Hewlett-Packard has no control over the actual print quality of a refilled toner cartridge. The print

quality of HP LaserJet toner cartridges influences the customer’s perception of the printer.

Repairs resulting from the use of refilled toner cartridges are not covered under the HP warranty or maintenance contract.

Recycling toner cartridges

In order to reduce waste, Hewlett-Packard has adopted a recycling program for used toner cartridges. Plastics and other material are recycled. Cartridge components that do not wear out are reused. HP pays the shipping costs from the user to the recycling plant. To join this recycling effort, follow the instructions inside the toner cartridge box.

50 Printer maintenance EN

Cleaning the printer

To maintain the print quality, thoroughly clean the printer:

l Every time you change the toner cartridge. l After printing approximately 2,500 pages. l Whenever print quality problems occur.

Clean the outside of the printer with a lightly water-dampened cloth. Clean the inside with only a dry , lint-free cloth. Observe the warnings and cautions below.

WARNING! Before you begin these steps, unplug the printer to avoid shock hazard.

When cleaning around the front door area, avoid touching the heating element. It may be HOT. (For heating element location, see Figure 6-14.)

Cleaning printer components

CAUTION T o av oid permanent damage to the toner cartridge, do not use ammonia-based cleaners on or around

the printer. Do not touch the transfer roller with your fingers. Contaminants on the roller can cause print quality problems.

Table 4-2 Cleaning printer components

Component Cleaning Method/Notes

Outside Cove rs Use a water-dampened cloth. Do not use solvents or ammonia-based

cleaners.

Inside General Use a dry, lint free cloth. Remove all dust, spilled toner, and paper particles. Exit Roller Use a water-dampened lint-free cloth.(For location, see Figure 6-8.) Fuser Exit Roller Use a water-dampened lint-free cloth. (For location, see Figure 6-18.) Pickup Roller Use a lint-free cloth dampened with isopropyl alcohol. (For location, see

Figure 6-25.)

Pressure Roller Use a dry lint-free cloth. (For location, see Figure 6-16.) Transfer Roller Use a dry, lint-free cloth. DO NOT TOUCH with your fingers. (For location,

see Figure 6-30.)

Separation Pad Use a dry lint-free cloth. (For location, see Figure 6- 31.) Delivery Assembly Use a water-dampened lint-free cloth. (For location, see Figure 6-10.) Static Eliminator Teeth Use compressed air. (See Figure 4-2 on the following page for s tatic

eliminator teeth location.)

EN Cleaning the printer 51

Figure 4-2 Static Eliminator Teeth (located in front of the transfer roller)

Cleaning spilled toner

Defective toner cartridges can develop leaks. In addition, after a paper jam has occurred, there may be some toner remaining on the rollers and guides inside the printer . The pages that print immediately after the jam may pick up this toner.

Clean spilled toner with a cloth slightly dampened in cold water. Do not touch the Transf er Roller with the damp cloth or with your fingers. Do not use a vacuum cleaner unless it is equipped with a microfine particle filter.

Note If toner gets on your clothing, use cold water to remove it. Hot water sets toner stains into fabric.

52 Printer maintenance EN

5 Functional overview

Chapter contents

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

DC Controller/power system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Print engine control system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56

Power system (on DC Controller PCA). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Formatter system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58

CPU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Read only memory (ROM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58

Random access memory (RAM). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Parallel interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58

Resolution Enhancement technology (REt) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59

EconoMode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Memory Enhancement technology (MEt) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59

Enhanced I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59

Page Protect. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

PJL overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60

Image formation system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Toner cartridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Step 1: Drum cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62

Step 2: Drum conditioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62

Step 3: Image writing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62

Step 4: Image developing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62

Step 5: Image transferring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62

Step 6: Image fusing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62

Paper feed system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Paper jam detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65

Basic sequence of operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66

EN Chapter contents 53

Basic printer functions

This chapter presents a generalized functional overview of the printer and the printing processes. The following printer systems are discussed:

l DC Controller System/ Power System l Formatter Syst em l Image Formation System l Paper Feed System l Laser/Sca nner System

Figure 5-1 is a generalized block diagram of the printer:

Laser/Scanner System Formatter System

Control

Formatter

Panel

Scanning Mirror

Laser

Diode

Circuit

DC Controller/Power System

DC Controller

Scanner

Motor

Paper Outpu t Bin

Image Formation

System

Primary

Charging

Roller

Front Output Slot

Fusing

Cleaner

Assembly

Photo-

sensitive

drum

Transfer

Charging

Roller

Developing

Unit

Pick-

Unit

Paper Input Tray

Single Sheet Input Slot

Pick Up/Feed System

Figure 5-1 Printer functional block diagram

54 Functional overview EN

DC Controller/power system

The DC Controller PCA coordinates all print engine activities, drives the laser, and coordinates print data from the Formatter PCA with the image formation process. The DC Controller also includes both AC and DC power supply and distribution circuitry. The DC Controller controls the following systems and functions:

l Print Engine Control

• Laser and Scanner Drive

• Paper Motion Photosensors (Paper Out, Paper Registration, and Paper Exit Sensors)

• Motor

l Power System

• AC Power Distribution

• DC Power Distribution

• Overcurrent/Undervoltage Protection

• SleepMode

• High Voltage Power Distribution

Figure 5-2 shows the various DC controller loads.

PCA

Memory

I/O

Control Panel

DC ControllerFormatter

Power

Supply

AC Driver

LV Power

Supply

CPU

Delivery

Paper

Sensor

HV Power

Supply

Main Motor

Drive

Fuser

Drive

Laser/Scanner

Assembly

Laser Diode

Toner Cartridge Charging Roller

Developing Roller

Bias

Transfer Roller

Motor

Fusing Assembly

Sensors/Solenoid

Figure 5-2 DC Controller loads

EN DC Controller/power system 55

Print engine control system

Laser and scanner drive

Based on information received from the Formatter, the DC Controller sends signals to the Laser/ Scanner Assembly to modulate the laser diode ON and OFF and to drive the Laser/Scanner motor. Refer to “Image formation system” later in this chapter for more information.

Paper motion monitoring and control

The DC Controller PCA controls paper motion 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 photosensors and solenoid with the paper movement process, refer to “Paper f eed system” later in this chapter.

12 V shutoff switch

The 12 volt DC power shutoff switch, Switch 101, located on the top of the printer, is activated by the printer door. The front door must be closed before the printer can resume printing.

Engine test switch

The Test Print, Switch 201, located on the DC Controller, is activated manually through an access hole at the front of the printer. This switch causes the print engine to perform a self-test diagnostic which bypasses the Formatter PCA and prints a full page of black vertical lines. This test is useful for troubleshooting printer problems because it isolates the print engine from the Formatter PCA. (See Chapter 7, “Troubleshooting,” to learn more about how to perform an engine test.)

Motor

The Motor is controlled by the DC Controller PCA. The Motor provides all of the printer’s paper movement.

Power system (on DC Controller PCA)

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

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 fusing assembly’s heating element.

56 Functional overview EN

DC power distribution

The DC power distribution circuitry, located on the DC Controller PCA, distributes +5 V DC and +12 V DC as follows:

+5 V DC l Formatter PCA

l Photosensors l DC Controller Circuitry l Laser/Beam Detect Circuitry

+12 V DC:

+12 VA DC l High Voltage Power Supply

l Motor l Scanne r Motor l Solenoid

Overcurrent/overv oltage pr otection

There are two overvoltage/overcurrent devices in this printer:

l Fuse F101 provides overcurrent protection for the fusing system circuitry. To check or replace the

fuse requires the removal of the DC Controller. Fuse 102 (found only on 110V units) provides overcurrent protection to the printer DC power supply circuitry.

l In addition, the +12V DC and +5V DC power circuitry contains an overcurrent protection circuit

that automatically shuts off the output voltage when an overcurrent condition occurs due to a short or abnormal voltage on the load side.

SleepMode

Instead of a power switch, the printer has a SleepMode function. After the printer has been idle for 15 minutes, it turns itself off by shifting to SleepMode. The Control Panel lights remain off, and the printer retains all printer settings and downloaded fonts and macros while in SleepMode.

The printer exits SleepMode and all of the lights power on when any of the following occur:

l A job is received. l The Control Panel Button is pressed. l The printer front door is opened.

Note The printer will not enter SleepMode if there is a printer error.

High voltage power distribution

The High Voltage Power Supply PCA 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 charging roller according to the instructions from the CPU on the DC Controller PCA.

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

High voltage is disabled when the printer’s EP Door is open (i.e., switch SW101 is open).

EN DC Controller/power system 57

Formatter system

The Formatter PCA is responsible for the following:

l Receiving and processing print data from the printer interface. l Monitoring Control Panel Button and relaying printer status information. l Developing and coordinating data placement and timing with the print engine. l Storing font information. l Communicating with the host computer through the Bi-Directional Interface.

The Formatter PCA receives print data from the Bi-Tronics Interface and converts it into a dot image. The DC Controller 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.

On the HP LaserJet 5L and 6L, the Formatter PCA also provides mounting locations for additional memory.

CPU

The Formatter PCA incorporates a microprocessor operating at a minimum of 24 MHz.

Read only memory (ROM)

Besides storing microprocessor control programs, the ROM stores dot patterns of internal character sets (fonts).

Random access memory (RAM)

The RAM stores printing and downloaded font information received from the host system and temporarily stores a full page of print image data before the data is sent to the print engine. (See “Page Protect” later in this chapter.) F or the HP LaserJet 5L and 6L printers, memory capacity can be increased by adding a DRAM memory card to the Formatter PCA. Note that adding memory may also increase print speed when printing complex graphics. The HP LaserJet 6L Pro does not support memory expansion or the use of a JEDIA card.

Parallel interface

The Formatter PCA receives incoming data through its Bi-Tronics interface. The Bi-Tronics I/O provides high speed and two-way communication between the printer and the host, allowing the user to change printer settings and monitor printer status from the host computer. This interface is IEEE1284 compliant.

Control Panel

Status LED lights

The Formatter uses three LEDs mounted under the printer cover to communicate printer status to the user. Refer to “Using the Control Panel” in Chapter 3 and “Printer Error Tr oubleshooting” in Chapter 7 for more information on the lights.

Control Panel Button

The Control Panel Button is used for such functions as self test, reset, and to display error codes. Refer to “Using the Control Panel” in Chapter 3 for more information on the Control Panel Button.

58 Functional overview EN

Resolution Enhancement technology (REt)

The Formatter PCA contains circuitry for Resolution Enhancement technology (REt), which modifies the standard video dot data on its way to the DC Controller to produce smoothed black-to-white boundaries. REt is user-adjustable from some software applications. Available settings are On or Off.

EconoMode

The EconoMode setting uses approximately 50 percent less toner than standard mode printing by reducing the dot density. However, EconoMode does not extend toner cartridge component life. EconoMode, which can also be thought of as “draft mode,” is user-selectable through some software applications. The default setting is Off.

Normal mode, medium density

EconoMode, medium density

Figure 5-3 EconoMode vs. Normal Mode

Note EconoMode does not affect print speed or memory usage.

Memory Enhancement technology (MEt)

The Hewlett-Packard Memory Enhancement technology (Met) effectively doubles the standard memory through a variety of font and data compression methods. MEt is only available in PCL mode and is not customer selectable. When using the host-based driver, your PC handles memory management.

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 your printer in shorter amounts of time, which allows you to return to your application sooner. Enhanced I/O has the following options:

l 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.

l Off uses the minimum amount of printer memory for storing data sent from the host computer.

Enhanced I/O is only available in PCL mode. When using the host-based driver (HP LaserJet 5L and 6L only), your PC handles memory management.

EN Formatter system 59

Page Protect

Page complexity (rules, complex graphics, or dense text) may 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 may 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.

Page Protect allows the Formatter to create the entire page image in page buffer memory before physically moving the paper through the printer. This process ensures that the entire page will be printed. Page Protect applies only to PCL printing. The default setting is Auto.

PJL overview

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

l T wo-wa y communication with the host computer through a Bi-directional Parallel connection. The

printer can tell the host such things as the control panel status.

l 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.

60 Functional overview EN

Image formation system

Laser printing requires the interaction of several different technologies (such as 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 six processes:

Step 1 Drum Cleaning Step 2 Drum Conditioning Step 3 Image Writing Step 4 Image Developing Step 5 Image Transferring Step 6 Image Fusing

Electrostatic Latent Image Formation Block

Flow of Paper

1. Primary Charging

Drum Cleaning

Block

Paper Delivery

7. Drum Cleaning

Fuser Block

6. Fusing

Figure 5-4 Image formation block diagram

Toner car t ridge

As the “heart” of the Image Formation System, the toner cartridge houses the cleaning, conditioning, and developing steps of the process. The toner cartridge contains the photosensitive drum, primary charging roller, developing station, toner cavity, and cleaning station. Including these components, which wear, degrade, or are consumed in the replaceable toner cartridge, eliminates the need for a service call when replacement is required. The special photosensitive properties of the drum allow an image to be formed on the drum surface and then transferred to paper.

2. Scanning Exposure

5. Separation

Transfer Block

4. Transfer

3. Developing

Registration

Direction of Drum

Manual Feeding Slot

Multi-Purpose Tray

CAUTION The printer’s toner cartridge does not include a light-blocking shutter. Be careful to avoid exposing the

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

EN Image formation system 61

Step 1: Drum cleaning

The cleaning blade is in contact with the surface of the drum at all times. As the drum rotates during printing, excess toner wiped off and stored in the waste toner receptacle.

Step 2: Drum conditioning

After the drum is physically cleaned, it must be conditioned. This process consists of applying a uniform negative charge on the surface of the drum with the primary charging roller, located in the toner 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, a negative DC bias is applied by the charging roller to create a uniform negative potential on the drum surface. The amount of DC voltage is modified by the print density setting.

Step 3: Image writing

During the writing 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, off a mirror, and finally through a slot in the top of the toner 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 is sweeping the entire length of the drum and the drum is rotating, 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). The BD signal is sent to the DC Controller, where it is converted to an electrical signal used to synchronize the output of the next scan line of data.

Step 4: Image developing

At this stage of the 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 repelled from the negatively charged (non-exposed) areas.

Step 5: Image transferring

During the transferring process, the toner image on the drum surface is transferred to the paper. A positive charge applied to the back of the paper by the transfer roller causes the negatively charged toner on the drum surface to be attracted to the paper. After separation, the drum is cleaned and conditioned for the next image.

Step 6: Image fusing

During the fusing process, the toner is fused into the paper by heat and pressure to produce a permanent image. The paper passes between a heated fusing element and a soft pressure roller. This melts the toner and presses it into the paper.

62 Functional overview EN

Paper feed system

Both the Paper Input Tray and the Single Sheet Input Slot merge into one, main input area. Paper placed in either of these areas enables the Paper Out Sensor (sensor 202), which informs the DC Controller that paper is present.

When the printer receives a print job and is ready to print, the DC Controller enables the Laser/ Scanner Assembly and the Motor. Paper motion begins when the DC Controller energizes solenoid SL1. This causes the paper pick up roller to rotate once. Two actions occur as a result of this rotation. First, the paper kick plate pushes the paper against the pick-up roller. Second, the pick-up 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, along with two subpads, hold the remainder of the stack in place.

The feed assembly drive rollers advance the paper to the Paper Registration photosensor (PS203). This sensor informs the DC Controller of the exact location of the paper’s leading edge, so that the image being written on the photosensitive drum can be precisely positioned on the page. The feed assembly drive rollers then advance the paper to the transfer area where the toner image on the photosensitive drum is transferred to paper.

After the image is transferred, the paper enters the fusing assembly where heat from the fuser and pressure from the Pressure Roller permanently bond the toner image to paper. The Paper Exit Sensor (PS201) determines that paper has successfully moved out of the fusing area. The fusing assembly exit rollers deliver paper to either the Output Paper Bin or the Front Output slot, depending upon the position of the Face-up/Face-down lever.

Figure 5-5 shows a simplified paper path and the locations of the photosensors and rollers.

Paper Output Bin

Toner Cartridge

Delivery Roller #1

Front Output Slot

Paper Exit

Sensor

(PS201)

Heating Element

Manual Input Slot

Pressure Roller Transfer Roller

Paper

Input

Bin

Paper Out Sensor

(PS202)

Pick-up Roller

Paper Registration

Sensor

(PS203)

Main Motor

Figure 5-5 Simplified paper path

EN Paper f eed system 63

Figure 5-6 shows the locations of the photosensors, switches, solenoid, and other important printer elements. Table 5-1 describes the function of each photosensor and the solenoid.

SW101

PS202

PS203

SL1

Drive Unit

Main Motor

Formatter

Figure 5-6 Solenoid and sensors

PS204 (5L only)

Pick-up Roller Assembly

Laser Scanner

Heating Element

DC Controller

SW201

PS201

Table 5-1 Solenoid and sensors

Number Name Description

SL1 Paper Pick-up Solenoid Enables the Paper Pickup Roller. PS201 Paper Exit Sensor Senses when paper has successfully

moved out of the fusing area and the next sheet of paper can be fed.

PS202 Paper Out Sensor Senses no paper in either the Paper Input

Tray or Manual Input Slot. If this sensor does not sense paper in the Input P a per Tray or the Single-Sheet Input Slot, the formatter display s the pap er-ou t indi ca tion on the Control Pane l. Paper must be reloaded before printing can resume.

PS203 Paper Registration Sensor Detects the leading and trailing edges of

the paper. Syn chroniz es the photos ensitiv e drum and the top of the paper.

PS204 Door Open/C a rtridge Sensor (HP LaserJet

5L only) In the HP LaserJet 6L, SW101 performs the function of 5L’s PS204. The 6L Pro has no toner cartridge sensor.

Detects whether printer door is open and cartridge is in place. If the door is open or the cartridge is not in place, the control panel LEDs will display an error message. Printing cannot continue until the door is closed and the cartridge is in proper position.

64 Functional overview EN

Paper jam detection

The Paper Out Sensor (PS202), Paper Registration Sensor (PS203), and the Paper Exit Sensor (PS201) detect when paper is moving through the printer. (See Figure 5-5 for roller and sensor locations.) If a paper jam is detected, the DC Controller immediately stops the printing process and causes a paper jam indication on the Control Panel.

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

l Power-On Jams. Paper is present under either PS201 or PS203 at power-on. l Pickup Jams. Paper does not reach and clear photosensor PS203 within a specified period of

time. The time period begins when the Paper Pickup Solenoid (SL1) is energized.

l Delay Jams. Paper does not reach or clear a specific photosensor within a specified period of

time.

EN Paper f eed system 65

Basic sequence of operation

The Formatter PCA and the DC Controller PCA share information during printer operation. The DC Controller-to-Formatter Connector (J201) forms a link that operates as a serial data bus. This allows printer status, command information, and dot-image data to be passed between the two PCAs. Figure 5-7 shows the general timing of the printer events. The f ollowing events take place during normal prin ter operation:

Table 5-2 Printer timing

Period Timing Purpose

WAIT From when the paper is inserted to the end

of Main Motor initial rotation.

STBY (standby) From the end of the WAIT or the LSTR

period until the input of the PRNT signal from the Formatter. Or from the end of the LSTR period until power OFF.

INTR (initial rotation) From the input of the PRNT signal from the

Formatter until the la ser diode int ensity has been stabilized.

PRNT From the end of initial rotation until the

Scanner Motor stops.

LSTR (last rotation) From the primary voltage (DC) OFF until

the Main Motor stops. If another PRNT signal is sent from the

Formatter, the printer returns to the INTR period. If not, it returns to the STBY period.

Refer to the Timing Diagrams on the following pages.

Clear the drum surf ac e po ten tia l an d c lea n the Transfer Roller.

Maintain the printer in ready state.

Stabilize the photosensitive drum sensitivity in preparation for printing. Also clean the Transfer Roller.

Form images on the photosensitive drum based on the /VDO signal from the Formatter and transfer the image to paper.

Deliver the last sheet of paper. Also clean the Transfer Roller.

66 Functional overview EN

Figure 5-7 General timing diagram - HP LaserJet 5L

EN Basic sequence of operation 67

Figure 5-8 General timing diagram - HP LaserJet 6L and HP LaserJet 6L ProSL

68 Functional overview EN

6 Removal and replacement

Chapter contents

Removal and replacement strategy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70

Required tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71

Installing memory cards (DRAM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72

Covers and doors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

Back Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73

EP Door Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Memory Door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Main Cover and Paper Input Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77

Internal assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78

Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78

Exit Roller Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .79

Delivery Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Fuser Pressure Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82

Heating Element . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

Pressure Roller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .87

Face-Up/Face-Down Lever. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88

Fuser Exit Roller Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

Paper Exit Sensor Flag. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90

Top assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .91

Laser/Scanner Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .91

Solenoid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92

Pickup Roller Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .94

Paper Feed Frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .97

Transfer Roller Guide and Transfer Roller. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .101

Kick Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .102

Separation Pad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .104

Subpads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

Feed Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .106

Bottom assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

Memory Door Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .109

Motor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

DC Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

Formatter PCA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .114

EN Chapter contents 69

Removal and replacement strategy

This chapter documents removal and replacement of Field Replaceable Units (FRUs) only. Replacement is generally the reverse of removal. Occasionally , notes are included to provide

direction 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 may result. 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 this printer can be sharp! Exercise caution when working with the printer.

CAUTION The printer contains parts that are electrostatic discharge (ESD) sensitive. Always service printers at

an ESD-protected workstation . To install a self-tapping screw, first turn it counter-clockwise to align it with the existing thread pattern,

then carefully turn clockwise to tighten. Do not overtighten. If a self-tapping screw-hole becomes stripped, repair the screw-hole or replace the affected assembly.

Note Always remove the toner cartridge before removing or replacing parts.

70 Removal and replacement EN

Required tools

l #2 Phillips scr ewdr iver with a magnetic tip l small flathead screwdriver l needlenos e plier s

CAUTION A PosiDriv screwdriver will damage the printer’s screw heads. Us e Phillips only.

Figure 6-1 shows the difference between a Phillips and a PosiDriv screwdriver. Note that a Phillips tip has more beveled surfaces.

Phillips PosiDriv

Figure 6-1 Phillips and PosiDriv screwdrivers

EN Required t ools 71

Installing memory cards (DRAM)

Note

The HP LaserJet 6L Pro does not support memory upgrades.

1 Unplug the power cord from the printer. You should not install a

memory card while the printer is in SleepMode.

2 Open the Printer Door, remove the toner cartridge, and close the

Printer Door. Protect the toner cartridge from light while you are working on the printer.

3 Remove any paper in the paper tray. Gently tip the printer onto its

side so that the memory cover is on top as shown in Figure 3.

4 Remove the Memory Expansion Cover by carefully pulling the tab

out and away from the printer in a gentle rocking motion.

5 Align the memory card with the corner notch so it is positioned as in

Figure 4. Push it firmly into the printer

Replace the Memory Expansion Cover, set the printer upright, reinstall the toner cartridge, reinsert paper, and reconnect to the power source.

Print a self-test page (see Chapter 3) to check that the printer recognizes the additional memory you have added. Your Total Memory in the “Printer Information” section will show the new MB total.

1 MB card 2 MB total 2 MB card 3 MB total 4 MB card 5 MB total 8 MB card 9 MB total

72 Removal and replacement EN

Covers and doors

Back Cover

1 Unplug the power cord and remove the parallel cable from the back of the printer. 2 Remove the toner cartridge. 3 Lift the Input Extender assembly.

CAUTION You must lift the Input Extender when the covers are removed or it will break. After you have removed

the covers, leave the Input Extender in this lifted position for ease of replacement.

Note The Input Extender for the HP LaserJet 6L Pro differs from the one shown in the photo. It does not

have the extra extender for legal-size paper.

4 Remove the (3) screws (Figure 6-2, callout 1).

Figure 6-2 Back Cover removal (1 of 2)

EN Covers and doors 73

5 Separate the rear panel from the main cover , pulling the lower corners away from the printer first.

Then, insert the small flathead screwdriver into the openings at the top to pop the upper corners (Figure 6-3, callout 1).

6 Remove the cover by grabbing it on both sides and pulling it straight back with a firm pull (Figure

6-3, callout 2).

Figure 6-3 Back Cover removal (2 of 2)

To reinstall

Make certain the Input Extender is raised before you reinstall the back cover.

74 Removal and replacement EN

EP Door Assembly

1 Unplug the power cord and remove the parallel cable from the back of the printer. 2 Open the EP Door. 3 Remove the toner cartridge. 4 There is a flex point along the door hinge. Firmly press the left tab inward to release it (Figure 6-

4). The right tab will fall out easily.

Figure 6-4 EP Door Assembly removal

EN Covers and doors 75

Memory Door

Note This procedure does not apply to the HP LaserJet 6L Pro. That model does not have a Memory Door.

1 Unplug the power cord and remove the parallel cable from the back of the printer. 2 Remove the toner cartridge. 3 Gently tip the printer onto its side so that the Control Panel is on top. 4 Carefully pull the door tab out (Figure 6-5, callout 1) and away from the printer in a gentle rocking

motion (Figure 6-5, callout 2).

Figure 6-5 Memory Door removal

76 Removal and replacement EN

Main Cover and Paper Input Assembly

1 Remove the toner cartridge. 2 Remove memory door (HP LaserJet 5L and 6L).

CAUTION Remove the memory door first (HP LaserJet 5L and 6L). The door will break if you remove the Main

Cover without removing the memory door.

3 Remove the EP Door Assembly. 4 Remove the Back Cover. 5 Remove the (2) screws from the top of the printer (Figure 6-6, callout 1). 6 Grasp the two lower, front corners of the printer and pull gently outward to release the front of the

Main Cover.

7 Lift the cover straight off. 8 Remove the Paper Input Assembly (Figure 6-6, callout 2) by rotating it forward and lifting it out

with firm pressure.

Figure 6-6 Main Cover and Paper Input Assembly removal

Note When replacing the Paper Input Assembly, make certain that the mylar sheet is positioned between

the Input Feed Roller and Separation Pad and that the sheet is not folded or bent.

EN Covers and doors 77

Internal assemblies

Control Panel

Procedure for HP LaserJet 5L and 6L

1 Remove the Printer Covers. 2 Use the needlenose pliers to release the Control Panel connector (Figure 6-7,callout 1). 3 Press the tab on the top of the Control Panel downward (Figure 6-7, callout 2). The Control Panel

will pop out of the printer chassis.

4 Lift the Control Panel out.

Procedure for HP LaserJet 6L Pro

1 Remove the Printer Covers. 2 Press the tab on the top of the Control Panel downward (Figure 6-7, callout 2). The Control Panel

will pop out of the printer chassis.

Note The Control Panel on the HP LaserJet 6L Pro is soldered directly to the wiring harness. It is not attached

with a connector. Do not try to separate the Control Panel from the wiring harness. 3 Press the tab on the top of the Control Panel downward (Figure 6-7, callout 2).The Control Panel

will pop out of the printer chassis.

4 Carefully remove the cable from the guides on the printer chassis.

Note The other end of the wiring harness is attached to the Formatter PCA with a connector. See “Formatter

PCA” later in this chapter for more information.

Figure 6-7 Control Panel removal

78 Removal and replacement EN

Exit Roller Assembly

1 Remove Printer Covers. 2 Grasp both tabs at the lower ends of the Exit Roller bushings and pull inward. This will release

the tabs from the printer chassis (Figure 6-8, callout 1).

3 Rotate the tabs 90 degrees, clear of the printer chassis (Figure 6-8, callout 2). 4 Lift the roller out.

Figure 6-8 Exit Roller removal

To reinstall

The end of the Exit Roller that has a gear attached must fit into the gear train. Although it is possible to reinstall the Exit Roller so that the gear end is on the opposite side of the printer, this placement would cause paper path problems.

EN Internal assemblies 79

Delivery Assembly

1 Remove the Printer Covers and Exit Roller Assembly. 2 Remove the EP Right-hand assembly by pressing inward on the tab (Figure 6-9, callout 1) and

sliding the assembly toward the front of the printer (Figure 6-9, callout 2).

Note The EP Right-Hand assembly must be removed to access any fuser components.

Figure 6-9 Delivery Assembly removal (1 of 2)

80 Removal and replacement EN

3 Use the magnetic screwdriver to remove the (2) screws (Figure 6-10, callout 1). 4 Rotate the rear of the Delivery Assembly up and forward, then lift it out of the printer.

Figure 6-10 Delivery Assembly removal (2 of 2)

Note When reinstalling the Delivery Assembly, make sure that the tabs on the front end of the Delivery

Assembly fit under the sheet metal fuser plate below.

EN Internal assemblies 81

Fuser Pressure Plate

1 Remove Printer Covers and Delivery Assembly (Figures 6-9 and 6-10). 2 Remove the (2) screws (Figure 6-11, callout 1). 3 Press the Fuser Plate retainer clips out to release the Pressure Plate (Figure 6-11, callout 2). 4 Rotate the plate around and toward the back. Lift up to remove it (Figure 6-11, callout 3).

Figure 6-11 Fuser Pressure Plate removal

82 Removal and replacement EN

To reinstall

The Fuser Pressure Plate is kept in place by four locking mechanisms in each corner. Place the rear slits in the plate over the rear brackets that hold the Fusing Assembly (Figure 6-12, callout 1). Lower the plate over the retaining clips, pressing on both sides of the Fuser Pressure Plate (Figure 6-12, callout, 2). It is important that the spring is placed over the positioning pin (callout 3) because inadequate pressure will cause fusing problems. Replace the screws.

Figure 6-12 Fuser Pressure Plate replacement

EN Internal assemblies 83

Heating Element

1 Remove Printer Covers, Delivery Assembly (Figures 6-9 and 6-10), and Fuser Pressure Plate

(Figure 6-11).

2 Remove the wire cover (on the right side of the printer) for the Heating Element wires by pressing

in on the tab and pulling outward (Figure 6-13, callout 1).

Figure 6-13 Heating Element remo val (1 of 3)

84 Removal and replacement EN

3 Disconnect the AC voltage to the Heating Element by releasing the connector located on the DC

Controller. Press down on the connector release with a small, flathead screwdriver (Figure 6-14, callout 1). (Because this is a small space, it is much easier to reach the connector with a screwdriver.) Pull straight out (Figure 6-14, callout 2).

Figure 6-14 Heating Element remo val (2 of 3)

EN Internal assemblies 85

4 Remove the wire from the wire guides along the right-side of the printer. 5 Disconnect the thermistor feedback connector in the left front side of the Fusing Assembly

(Figure 6-15).

Figure 6-15 Heating Element remo val (3 of 3)

6 Lift the Heating Element out.

To reinstall

Make sure the connectors are properly reattached.

86 Removal and replacement EN

Pressure Roller

1 Remove Printer Covers, Delivery Assembly (Figures 6-9 and 6-10), Fuser Pressure Plate (Figure

6-11), and Heating Element (Figures 6-13 through 6-15).

2 Remove the Pressure Roller guide by lifting the edge (Figure 6-16, callout 1) and then rolling it

gently backward (Figure 6-16, callout 2).

Figure 6-16 Pressure Roller Guide removal

3 Lift the right end of the Pressure Roller up and out of the printer chassis.

Note The right end of the Pressure Roller is greased.

4 The left side will follow easily with the Pressure Roller gear still attached.

Note When reinstalling the Pressure Roller, apply a drop of grease to the grounding plate on the right side

of the shaft. (Refer to Chapter 8 for a part number.)

EN Internal assemblies 87

Face-Up/Face-Down Lever

1 Remove Printer Covers, Delivery Assembly (Figures 6-9 and 6-10), Fuser Pressure Plate (Figure

6-11), and Heating Element (Figures 6-13 through 6-15), and Pressure Roller (Figure 6-16).

2 Rotate the lever forward 90 degrees (past the spring) and pull it straight out the front of the

printer.

To reinstall

1 Make sure the lever arm is on the left and is initially pointing downward. 2 Pull the spring forward using needlenose pliers. 3 Slide the short, round tabs into the grooves on the Separation Guide Assembly. The machined

ridges on the lever will face you.

4 Release the spring so it falls in place in front of the square tab (Figure 6-17).

Note While the shape of the lever was changed for the HP LaserJet 6L (a stiffening rod was also added),

these procedures for Face-Up/Face-Down Lever removal remain unchanged. Figure 6-17 shows the lever from an HP LaserJet 5L.

Figure 6-17 Face-Up/Face-Down Lever replacement

Note You can tell when the lever is in place because there are two plastic grooves that fit precisely in front

of the Exit Rollers, and you should be able to feel the spring’s release mechanism.

88 Removal and replacement EN

Fuser Exit Roller Assembly

1 Remove Printer Covers, Delivery Assembly (Figures 6-9 and 6-10), Fuser Pressure Plate (Figure

6-11), and Heating Element (Figures 6-13 through 6-15), Pressure Roller (Figure 6-16), and Face-Up/Face-Down Lever (Figure 6-17).

2 Remove the gear from the left end of the roller shaft by pressing down on the catching

mechanism with the small flathead screwdriver and pulling the gear away.

3 Remove the Exit Roller Assembly by pressing the small, white tab upward (Figure 6-18, callout 1)

and rotating it around (Figure 6-18, callout 2).

Note While the shape of the white tab was changed for the HP LaserJet 6L, these procedures for Fuser Exit

Roller Assembly removal remain unchanged. Figure 6-18 shows the white tab from an HP LaserJet 5L.

4 Slide the Exit Roller Assembly forward and out to the right of the printer.

Figure 6-18 Fuser Exit Roller removal

EN Internal assemblies 89

Paper Exit Sensor Flag

1 Remove the Printer Covers, Delivery Assembly (Figures 6-9 and 6-10), and Fuser Pressure

Plate (Figure 6-11).

CAUTION Before proceeding to Step 2, examine the Paper Exit Sensor flag. It is important to note the position

of the spring mechanism on the flag. The spring must be reinstalled to exactly this position. 2 Remove the Paper Exit Sensor flag by pressing down on the left side and pulling up on the right

side.

To reinstall

Note It is important that you reinstall the flag correctly , because installing it incorrectly will cause the Control

Panel to display an error with the Paper Exit Sensor (PS201). Place the left side of the flag in the correct position first, then slide the right side into place, making

certain the spring is on top of the flag (Figure 6-19). If the spring exerts no pressure on the flag, it may require “re-springing” by giving the spring an extra turn before reinstalling. The flag should fit snugly in place.

Figure 6-19 Paper Exit Sensor Flag replacement

90 Removal and replacement EN

Top assemblies

Laser/Scanner Assembly

1 Remove the Printer Covers. 2 Remove both Laser/Scanner connectors (Figure 6-20, callout 1).

Note The Laser/Scanner connect cable on the HP LaserJet 6L Pro is twisted (not shown in Figure 6-20).

3 Remove all (4) screws and lift the assembly straight off (Figure 6-20, callout 2).

Note One of the four screws is longer than the other three. Upon reinstallation, the longer screw must be

replaced in its original location.

Figure 6-20 Laser/Scanner Assembly removal

To reinstall

The Laser/Scanner connect cable on the HP LaserJet 6L Pro should be twisted before reinstalling (not shown in Figure 6- 20).

EN T op assemblies 91

Solenoid

1 Remove the Printer Covers. 2 On the left side of the printer, remove the paper pickup gear (Figure 6-21, callout 1) by pressing

the tabs in the center of the gear outward and pulling the gear off (Figure 6-21).

Figure 6-21 Solenoid removal (1 of 2)

92 Removal and replacement EN

3 Remove the Solenoid connector (J204) from the DC Controller (Figure 6-22, callout 1). 4 Remove the self-tapping screw that holds the Solenoid in place (Figure 6-22, callout 2). 5 Unthread the wires from the printer chassis. 6 Lift the Solenoid off.

Figure 6-22 Solenoid removal (2 of 2)

Note When reinstalling this part, the Paper Pickup Gear is keyed to go on the shaft in only one way.

EN T op assemblies 93

Pickup Roller Assembly

1 Remove the Printer Covers. 2 Remove the paper pickup gear (Figure 6-21).

Note This gear is keyed to go on the shaft in only one way.

3 Remove the pickup roller grounding clip on the right of the printer by lifting each end of the clip up

and over the two metal guides and sliding the clip off. Figure 6-23 depicts the clip from an HP LaserJet 5L. The clip from an HP LaserJet 6L (and some HP LaserJet 5Ls) is shaped differently.

6L/6L Gold/ 6L Pr o

(and some 5Ls)

Figure 6-23 Pickup Roller Assembly removal (1 of 2)

94 Removal and replacement EN

4 Using needlenose pliers, pull the bottom of the bushing out (Figure 6-24, callout 1), then turn it

counter clockwise to release it (Figure 6-24, callout 2).

Figure 6-24 Pickup Roller Assembly removal (2 of 2)

5 Lift the bushing out. 6 From inside the front of the printer, slide the right side of the Pickup Roller Assembly forward,

then lift the left side out.

EN T op assemblies 95

To reinstall

After placing the Pickup Roller shaft through on the left side, line up the Idler Roller tabs while repositioning the right side. Rock the shaft back and forth until the Pickup Roller and the Idler Roller tabs are cor rectly reinstalled.

Note It is important that the Pickup Roller is placed back in with the two Idler Roller tabs up, so that they fit

into the underside of the metal chassis behind the Laser/Scanner assembly (Figure 6-25).

Figure 6-25 Paper Pickup Roller Assembly replacement (inside/front view)

96 Removal and replacement EN

Paper Feed Frame

1 Remove the Printer Covers. 2 Remove the Pickup Roller Assembly (Figures 6-23 through 6-24). 3 Disconnect the following:

• Solenoid from the DC Controller at J204 (Figure 6-22, callout 1)

• Two connectors from the Laser/Scanner (Figure 6-26, callout 1)

• Connector from Top Cover/EP Cartridge Sensor on HP LaserJet 5L only (Figure 6-26, callout

• Connector from Switch 101 (Figure 6-26, callout 3)

• Connector from Front Control Panel (Figure 6-26, callout 4)

Figure 6-26 Paper Feed Frame removal (1 of 4)

EN T op assemblies 97

4 Release the catch on the control panel cable guide by using the small flathead screwdriver to

push on the tab (Figure 6-27). Then slide the guide off.

Figure 6-27 Paper Feed Frame removal (2 of 4)

98 Removal and replacement EN

HP LaserJet 5L, 6L, 6L Gold, 6L Pro Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Contents

Figures

Tables

1 Product infor mation

Chapter contents

Printer features

Identification

HP LaserJet 6L Gold

Model and serial

Specifications

Product overview

Service approach

Parts Exchange Program

Ordering parts

Ordering related documentation

Contacting HP to place an order

Technical assistance

HP worldwide sales and service offices

Warranty

Hardware service during the warranty period

Hardware service afte r the warranty period

HP LaserJet Toner Cartridge warranty

Voltage conversions

2 Site requirements

Chapter contents

Site requirements

Operating environment

Printer space requirements

The HP C3906A/F Toner Cartridge

Storage conditions

Storing opened toner cartridges

Toner car tri dg e handl ing suggestio ns

3 Operating overview

Chapter contents

Using the Control Panel

Control Panel layout

Indicator lights

The Control Panel Button

Printing a self-test page

Continuous self test

Printing an engine test

Resetting the printer

To reset the printer

4 Printer maintenance

Chapter contents

Life expectancy of consumables

Toner cartridge life

Saving toner with EconoMode

Refilled toner cartridges

Recycling toner cartridges

Cleaning the printer

Cleaning printer components

Cleaning spilled toner

5 Functional overview

Chapter contents

Basic printer functions

DC Controller/power system

Print engine control system

Power system (on DC Controller PCA)

Formatter system

Read only memory (ROM)

Random access memory (RAM)

Parallel interface

Control Panel

Resolution Enhancement technology (REt)

EconoMode

Memory Enhancement technology (MEt)

Enhanced I/O

Page Protect

PJL overview

Image formation system

Toner car t ridge

Step 1: Drum cleaning

Step 2: Drum conditioning

Step 3: Image writing

Step 4: Image developing