HP Scanjet N9120 service manual

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HP Scanjet N9120

Service Manual

HP Scanjet N9120

Service Manual

Safety information

Trademark credits

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

The information contained herein is subject to change without notice.

The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. HP shall not be liable for technical or editorial errors or omissions contained herein.

Part number L2683-90022

Edition 1, 7/2008

WARNING!

Potential Shock Hazard

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

Read and understand all instructions in the user guide.

Observe all warnings and instructions marked on the product.

Use only a grounded electrical outlet when connecting the product to a power source. If you do not know whether the outlet is grounded, check with a qualified electrician.

Do not touch the contacts on the end of any of the sockets on the product. Replace damaged cords immediately.

Unplug the product from wall outlets before cleaning.

Do not install or use the product near water or when you are wet.

Install the product securely on a stable surface.

Microsoft(r), Windows(r), and Windows(r) XP are U.S. registered trademarks of Microsoft Corporation.

Windows Vista® is either a registered trademark or trademark of Microsoft Corporation in the United States and/or other countries.

ENERGY STAR and the ENERGY STAR mark are registered U.S. marks.

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

Table of contents

1 Product basics

Quick access to product information .................................................................................................... 2

Product basics ...................................................................................................................................... 3

Product features .................................................................................................................. 3

Product walkaround ............................................................................................................. 4

Front and right-side view ..................................................................................... 4

Back view ............................................................................................................ 5

Side view (left) ..................................................................................................... 5

Model and serial numbers ................................................................................... 6

Control-panel walkaround .................................................................................................... 7

Supported product software ................................................................................................. 8

Supported operating systems ............................................................................. 8

Supported scanner drivers .................................................................................. 8

Supported scanner-management software ......................................................... 8

System requirements ........................................................................................................................... 9

Paper handling ................................................................................................................................... 10

ADF specifications ............................................................................................................. 10

Media specifications .......................................................................................................... 10

Media to avoid ................................................................................................................... 11

2 Installation and configuration

Prepare the site .................................................................................................................................. 14

Unpack the device .............................................................................................................................. 15

Install the software ............................................................................................................................. 19

3 Manage and maintain

Manage supplies ................................................................................................................................ 22

HP Scanner Tools Utility scanner maintenance information .............................................. 22

Parts life expectancy .......................................................................................................... 22

Clean the product ............................................................................................................................... 23

Clean the exterior .............................................................................................................. 23

Clean the ADF ................................................................................................................... 24

Clean the scanner glass .................................................................................................... 27

Clean the fan filters ............................................................................................................ 28

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4 Theory of operation

Basic operation ................................................................................................................................... 30

Modes and control-panel indicators ................................................................................................... 31

Circuit board assemblies .................................................................................................................... 32

Fans ................................................................................................................................................... 33

ADF feed system ................................................................................................................................ 34

Sensors .............................................................................................................................. 34

Motors ................................................................................................................................ 35

Service block diagram ........................................................................................................................ 36

5 Removal and replacement

Removal and replacement strategy .................................................................................................... 38

General cautions during removal and replacement ........................................................... 38

Electrostatic discharge ....................................................................................................... 38

Required tools .................................................................................................................... 39

Cleaning supplies .............................................................................................................. 39

Screws and fasteners ........................................................................................................ 39

Before performing service .................................................................................................. 39

After performing service ..................................................................................................... 40

User-replaceable parts ....................................................................................................................... 41

Imprinter cartridge .............................................................................................................. 42

Fan filters ........................................................................................................................... 44

ADF base reflector ............................................................................................................. 45

Pickup-roller assembly ....................................................................................................... 47

Separation-pad assembly .................................................................................................. 49

External covers ................................................................................................................................... 51

Scanner control-panel cover .............................................................................................. 52

Scanner back-filter cover ................................................................................................... 53

Scanner right-filter cover .................................................................................................... 53

ADF front cover .................................................................................................................. 54

ADF back cover ................................................................................................................. 57

Scanner back cover ........................................................................................................... 59

Automatic document feeder FRUs ..................................................................................................... 60

Automatic document feeder (ADF) .................................................................................... 62

Reinstall the ADF base reflector ....................................................................... 46

Reinstall the pickup-roller assembly .................................................................. 48

Reinstall the separation-pad assembly ............................................................. 50

Reinstall the ADF .............................................................................................. 66

ADF height adjustment ...................................................................................... 70

NVRAM data management ............................................................................... 73

Repair menu ..................................................................................... 73

Repair menu options ........................................................................ 74

Replacement scenarios .................................................................... 75

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NVRAM data file examples ............................................................... 82

NVRAM content adjustment ............................................................. 83

Download factory NVRAM data ........................................................ 84

Backup current NVRAM data ........................................................... 87

Repair NVRAM data ......................................................................... 89

Adjust NVRAM counter items ........................................................... 94

Align the ADF .................................................................................................... 96

Create the factory calibration data for ADF-A ................................................... 99

ADF motor fan ................................................................................................................. 101

ADF carriage fan .............................................................................................................. 102

ADF input-tray lift-motor assembly .................................................................................. 103

ADF exit-motor assembly ................................................................................................ 104

ADF feed-motor assembly ............................................................................................... 108

Reinstall the ADF feed-motor drive belt .......................................................... 110

Reinstall the ADF feed-motor assembly .......................................................... 111

ADF pick-motor assembly ................................................................................................ 114

Reinstall the ADF pick-motor assembly .......................................................... 116

Upper multi-pick sensor PCA ........................................................................................... 119

Lower multi-pick sensor PCA ........................................................................................... 121

ADF controller PCA ......................................................................................................... 123

Imprinter PCA .................................................................................................................. 125

Reinstall the imprinter PCA ............................................................................. 126

Input-tray sensor .............................................................................................................. 129

Flatbed scan position sensor ........................................................................................... 130

Reinstall the flatbed scan position sensor ....................................................... 131

Exit 1 sensor .................................................................................................................... 133

Exit 2 sensor .................................................................................................................... 134

Pick-up roller sensor ........................................................................................................ 135

Elevator arm sensor ......................................................................................................... 137

Background solenoid sensor ........................................................................................... 138

Paper-present sensor ...................................................................................................... 139

Registration sensor .......................................................................................................... 140

Jam door 1 sensor ........................................................................................................... 141

Jam door 2 sensor ........................................................................................................... 142

Jam door 3 sensor ........................................................................................................... 143

Imprinter paper-present sensor ....................................................................................... 144

ADF scan position sensor ................................................................................................ 146

ADF bottom corner outer paper path guide ..................................................................... 147

ADF bottom corner inner paper path guide ..................................................................... 149

ADF cal-strip assembly .................................................................................................... 150

Reinstall the cal-strip assembly ....................................................................... 152

ADF exit inner paper path guide ...................................................................................... 156

ADF top corner inner paper path guide ........................................................................... 159

Lower multi-pick sensor cover ......................................................................................... 160

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Flatbed scan position sensor arm .................................................................................... 162

Reinstall the flatbed scan position sensor arm ................................................ 163

Exit 1 sensor arm ............................................................................................................. 165

Exit 2 sensor arm ............................................................................................................. 166

Paper-present-sensor arm ............................................................................................... 168

Input-tray-elevator arm .................................................................................................... 169

Registration sensor arm ................................................................................................... 172

Scan position sensor arm ................................................................................................ 174

Pick-up roller spring ......................................................................................................... 175

Separation-pad spring ..................................................................................................... 176

ADF input-tray assembly ................................................................................................. 177

ADF output tray ................................................................................................................ 17 9

Reinstall the ADF output tray .......................................................................... 181

Pickup-roller cover ........................................................................................................... 183

ADF hinge limiters ........................................................................................................... 185

ADF jam door 3 ................................................................................................................ 186

Paper present sensor and imprinter PCA holder ............................................................. 188

ADF shingle wall .............................................................................................................. 190

A4 paper-stop .................................................................................................................. 193

ADF background-solenoid assembly ............................................................................... 194

Reinstall the ADF background-solenoid assembly .......................................... 197

Imprinter carriage and FFC .............................................................................................. 199

Flatbed scanner FRUs ..................................................................................................................... 201

Flatbed ............................................................................................................................. 202

Scanner carriage-motor fan ............................................................................................. 203

Scanner carriage fan ....................................................................................................... 206

Scanner carriage motor ................................................................................................... 208

Control-panel PCA ........................................................................................................... 211

Scanner controller PCA ................................................................................................... 213

Power-supply PCA ........................................................................................................... 216

Scanner-glass assembly .................................................................................................. 220

ADF power-cable assembly ............................................................................................. 221

Carriage-motor cable ....................................................................................................... 223

Power switch and power receptacle assembly ................................................................ 224

6 Solve problems

Troubleshooting process .................................................................................................................. 228

Pre-troubleshooting checklist ........................................................................................................... 229

Basic troubleshooting checks ........................................................................................................... 230

Power-on checks ............................................................................................................. 231

LED diagnostics .............................................................................................. 232

Check the USB connection ............................................................................. 233

Uninstall and then reinstall the HP Scanjet utilities ......................................... 233

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Control-panel buttons ...................................................................................... 234

Control-panel buttons diagnostics .................................................. 234

Locked control-panel buttons ......................................................... 234

Troubleshooting diagnostic software ................................................................................................ 235

Main screen ..................................................................................................................... 235

Scan dialog box ............................................................................................... 237

Sensor check dialog box ................................................................................. 239

Control panel check dialog box ....................................................................... 244

ADF feed test dialog box ................................................................................. 246

Actuators dialog box ........................................................................................ 248

NVRAM dialog box .......................................................................................... 251

Update dialog box ........................................................................................... 253

Repair menu .................................................................................................... 254

Version information dialog box ........................................................................ 255

Diagrams ......................................................................................................................... 256

Component locator diagrams .......................................................................... 256

Major components .......................................................................... 256

ADF motors and fans ...................................................................... 258

Printed circuit assemblies ............................................................... 260

Image-quality troubleshooting tools ................................................................................. 262

Repetitive-image-defect ruler .......................................................................... 262

Computer-display error messages ................................................................................................... 263

Computer-display error messages ................................................................................... 263

Solve paper-handling problems ........................................................................................................ 267

Jams ................................................................................................................................ 267

Common causes of jams ................................................................................. 267

Solve common ADF jams ................................................................................ 268

Clear jams from the ADF ................................................................................. 269

The bottom of the scanned image is cut off ..................................................................... 272

Scan extra long documents ............................................................................. 272

Disable misfeed (multipick) detection .............................................................................. 272

ADF does not feed paper ................................................................................................. 273

Solve image-quality problems .......................................................................................................... 274

Image defects .................................................................................................................. 274

Set the background color for scans from the ADF ........................................................... 276

Filter out color from a document (color dropout) .............................................................. 277

Solve performance problems ........................................................................................................... 278

Solve connectivity problems ............................................................................................................. 281

Solve direct-connect problems ........................................................................................ 281

7 Parts and diagrams

Ordering parts and supplies ............................................................................................................. 284

Service part numbers ....................................................................................................................... 285

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HP Scanjet N9120 documentation ................................................................................... 285

Imprinter cartridges .......................................................................................................... 285

Power Cords .................................................................................................................... 286

Maintenance kits .............................................................................................................. 286

Field replaceable units (FRUs) ........................................................................................ 287

How to use the parts diagrams and lists .......................................................................................... 289

ADF components .............................................................................................................................. 290

Flatbed scanner assemblies ............................................................................................................. 318

Alphabetical parts list ....................................................................................................................... 336

Numerical parts list ........................................................................................................................... 344

Appendix A Service and support

Hewlett-Packard limited warranty statement .................................................................................... 354

Customer self repair warranty service .............................................................................................. 355

Repack the product .......................................................................................................................... 356

Appendix B Specifications

Physical specifications ..................................................................................................................... 360

Electrical specifications .................................................................................................................... 360

Acoustic emissions ........................................................................................................................... 360

Power consumption specifications ................................................................................................... 360

Environmental specifications ........................................................................................................... 361

Appendix C Regulatory information

Regulatory Model Identification Number .......................................................................................... 364

Materials disposal ............................................................................................................................. 364

Disposal of waste equipment by users in private households in the European Union ..................... 364

Country/region specific statements .................................................................................................. 364

Korean regulatory ............................................................................................................ 364

Index ................................................................................................................................................................. 365

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List of tables

Table 1-1 Product guides ................................................................................................................................... 2

Table 1-2 Product specifications ........................................................................................................................ 3

Table 1-3 Control-panel features ........................................................................................................................ 7

Table 1-4 ADF specifications ........................................................................................................................... 10

Table 1-5 Media specifications ......................................................................................................................... 10

Table 2-1 Box contents .................................................................................................................................... 17

Table 3-1 Replacement guidelines ................................................................................................................... 22

Table 4-1 Main assemblies .............................................................................................................................. 30

Table 4-2 Modes and control-panel indicators ................................................................................................. 31

Table 4-3 Circuit board assemblies .................................................................................................................. 32

Table 4-4 Sensors ............................................................................................................................................ 34

Table 6-1 Initial troubleshooting checklist ...................................................................................................... 229

Table 6-2 Control-panel LEDs ........................................................................................................................ 232

Table 6-3 Main screen .................................................................................................................................... 235

Table 6-4 Scan dialog box .............................................................................................................................. 237

Table 6-5 Sensor in motion tab ...................................................................................................................... 239

Table 6-6 Sensor tab ...................................................................................................................................... 241

Table 6-7 Control panel check dialog box ...................................................................................................... 244

Table 6-8 ADF feed test dialog box ................................................................................................................ 246

Table 6-9 Actuators dialog box ....................................................................................................................... 249

Table 6-10 Repair menu ................................................................................................................................. 254

Table 6-11 Major components (1 of 3) ........................................................................................................... 256

Table 6-12 Major components (2 of 3) ........................................................................................................... 257

Table 6-13 Major components (3 of 3) ........................................................................................................... 257

Table 6-14 ADF motors and fans (1 of 2) ....................................................................................................... 258

Table 6-15 ADF motors and fans (2 of 2) ....................................................................................................... 259

Table 6-16 Scanner motors and fans ............................................................................................................. 259

Table 6-17 ADF controller PCA ...................................................................................................................... 260

Table 6-18 Scanner PCAs .............................................................................................................................. 261

Table 6-19 Repetitive defects ......................................................................................................................... 262

Table 6-20 ISIS driver communicated message ............................................................................................ 263

Table 6-21 SDSS error message displayed ................................................................................................... 264

Table 6-22 Image defect examples ................................................................................................................ 274

Table 6-23 Solve performance problems ....................................................................................................... 278

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Table 7-1 HP Scanjet N9120 documentation ................................................................................................. 285

Table 7-2 Imprinter cartridges ........................................................................................................................ 285

Table 7-3 Power cords ................................................................................................................................... 286

Table 7-4 Maintenance kits ............................................................................................................................ 286

Table 7-5 Field replaceable units (FRUs) ....................................................................................................... 287

Table 7-6 ADF assemblies (1 of 14) ............................................................................................................... 291

Table 7-7 ADF assemblies (2 of 14) ............................................................................................................... 293

Table 7-8 ADF assemblies (3 of 14) ............................................................................................................... 295

Table 7-9 ADF assemblies (4 of 14) ............................................................................................................... 297

Table 7-10 ADF assemblies (5 of 14) ............................................................................................................. 299

Table 7-11 ADF assemblies (6 of 14) ............................................................................................................. 301

Table 7-12 ADF assemblies (7 of 14) ............................................................................................................. 303

Table 7-13 ADF assemblies (8 of 14) ............................................................................................................. 305

Table 7-14 ADF assemblies (9 of 14) ............................................................................................................. 307

Table 7-15 ADF assemblies (10 of 14) ........................................................................................................... 309

Table 7-16 ADF assemblies (11 of 14) ........................................................................................................... 311

Table 7-17 ADF assemblies (12 of 14) ........................................................................................................... 313

Table 7-18 ADF assemblies (13 of 14) ........................................................................................................... 315

Table 7-19 ADF assemblies (14 of 14) ........................................................................................................... 317

Table 7-20 Flatbed scanner assemblies (1 of 9) ............................................................................................ 319

Table 7-21 Flatbed scanner assemblies (2 of 9) ............................................................................................ 321

Table 7-22 Flatbed scanner assemblies (3 of 9) ............................................................................................ 323

Table 7-23 Flatbed scanner assemblies (4 of 9) ............................................................................................ 325

Table 7-24 Flatbed scanner assemblies (5 of 9) ............................................................................................ 327

Table 7-25 Flatbed scanner assemblies (6 of 9) ............................................................................................ 329

Table 7-26 Flatbed scanner assemblies (7 of 9) ............................................................................................ 331

Table 7-27 Flatbed scanner assemblies (8 of 9) ............................................................................................ 333

Table 7-28 Flatbed scanner assemblies (9 of 9) ............................................................................................ 335

Table 7-29 Alphabetical parts list ................................................................................................................... 336

Table 7-30 Numerical parts list ....................................................................................................................... 344

Table B-1 Physical specifications ................................................................................................................... 360

Table B-2 Electrical specifications .................................................................................................................. 360

Table B-3 HP Scanjet N9120, ........................................................................................................................ 360

Table B-4 Environmental specifications ........................................................................................................ 361

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List of figures

Figure 1-1 Front and right-side view ................................................................................................................... 4

Figure 1-2 Back view .......................................................................................................................................... 5

Figure 1-3 Side view (left) .................................................................................................................................. 5

Figure 1-4 Model and serial number (1 of 2) ...................................................................................................... 6

Figure 1-5 Model and serial number (2 of 2) ...................................................................................................... 6

Figure 1-6 Control-panel features ...................................................................................................................... 7

Figure 2-1 Site dimensions ............................................................................................................................... 14

Figure 2-2 Unpack the device (1 of 9) .............................................................................................................. 15

Figure 2-3 Unpack the device (2 of 9) .............................................................................................................. 15

Figure 2-4 Unpack the device (3 of 9) .............................................................................................................. 16

Figure 2-5 Unpack the device (4 of 9) .............................................................................................................. 16

Figure 2-6 Unpack the device (5 of 9) .............................................................................................................. 17

Figure 2-7 Unpack the device (6 of 9) .............................................................................................................. 17

Figure 2-8 Unpack the device (7 of 9) .............................................................................................................. 17

Figure 2-9 Unpack the device (8 of 9) .............................................................................................................. 18

Figure 2-10 Unpack the device (9 of 9) ............................................................................................................ 18

Figure 2-11 Electrical connection ..................................................................................................................... 19

Figure 2-12 USB connection ............................................................................................................................ 19

Figure 2-13 Power switch ................................................................................................................................. 20

Figure 3-1 Clean the ADF (1 of 5) .................................................................................................................... 24

Figure 3-2 Clean the ADF (2 of 5) .................................................................................................................... 25

Figure 3-3 Clean the ADF (3 of 5) .................................................................................................................... 25

Figure 3-4 Clean the ADF (4 of 5) .................................................................................................................... 26

Figure 3-5 Clean the ADF (5 of 5) .................................................................................................................... 26

Figure 3-6 Clean the scanner glass ................................................................................................................. 27

Figure 3-7 Clean the scanner fan filters (1 of 2) ............................................................................................... 28

Figure 3-8 Clean the scanner fan filters (2 of 2) ............................................................................................... 28

Figure 4-1 Sensors ........................................................................................................................................... 34

Figure 4-2 Motors ............................................................................................................................................. 35

Figure 4-3 Service block diagram ..................................................................................................................... 36

Figure 5-1 Phillips and pozidrive screwdriver comparison ............................................................................... 39

Figure 5-2 Remove the imprinter cartridge (1 of 4) .......................................................................................... 42

Figure 5-3 Remove the imprinter cartridge (2 of 4) .......................................................................................... 42

Figure 5-4 Remove the imprinter cartridge (3 of 4) .......................................................................................... 43

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Figure 5-5 Remove the imprinter cartridge (4 of 4) .......................................................................................... 43

Figure 5-6 Remove the fan filter (1 of 2) .......................................................................................................... 44

Figure 5-7 Remove the fan filter (2 of 2) .......................................................................................................... 44

Figure 5-8 Remove the ADF base reflector (1 of 2) ......................................................................................... 45

Figure 5-9 Remove the ADF base reflector (2 of 2) ......................................................................................... 45

Figure 5-10 Reinstall the ADF base reflector ................................................................................................... 46

Figure 5-11 Remove the pickup-roller assembly .............................................................................................. 47

Figure 5-12 Reinstall the pickup-roller assembly (1 of 2) ................................................................................. 48

Figure 5-13 Reinstall the pickup-roller assembly (2 of 2) ................................................................................. 48

Figure 5-14 Remove the separation-pad assembly (1 of 3) ............................................................................. 49

Figure 5-15 Remove the separation-pad assembly (2 of 3) ............................................................................. 49

Figure 5-16 Remove the separation-pad assembly (3 of 3) ............................................................................. 50

Figure 5-17 Reinstall the separation-pad assembly ......................................................................................... 50

Figure 5-18 Remove the scanner control-panel cover ..................................................................................... 52

Figure 5-19 Remove the ADF front cover (1 of 5) ............................................................................................ 54

Figure 5-20 Remove the ADF front cover (2 of 5) ............................................................................................ 54

Figure 5-21 Remove the ADF front cover (3 of 5) ............................................................................................ 55

Figure 5-22 Remove the ADF front cover (4 of 5) ............................................................................................ 55

Figure 5-23 Remove the ADF front cover (5 of 5) ............................................................................................ 56

Figure 5-24 Remove the ADF back cover (1 of 3) ............................................................................................ 57

Figure 5-25 Remove the ADF back cover (2 of 3) ............................................................................................ 57

Figure 5-26 Remove the ADF back cover (3 of 3) ............................................................................................ 58

Figure 5-27 Remove the scanner back cover (1 of 2) ...................................................................................... 59

Figure 5-28 Remove the scanner back cover (2 of 2) ...................................................................................... 59

Figure 5-29 Remove the ADF (1 of 8) .............................................................................................................. 62

Figure 5-30 Remove the ADF (2 of 8) .............................................................................................................. 62

Figure 5-31 Remove the ADF (3 of 8) .............................................................................................................. 63

Figure 5-32 Remove the ADF (4 of 8) .............................................................................................................. 63

Figure 5-33 Remove the ADF (5 of 8) .............................................................................................................. 64

Figure 5-34 Remove the ADF (6 of 8) .............................................................................................................. 64

Figure 5-35 Remove the ADF (7 of 8) .............................................................................................................. 65

Figure 5-36 Remove the ADF (8 of 8) .............................................................................................................. 65

Figure 5-37 Reinstall the ADF (1 of 7) .............................................................................................................. 66

Figure 5-38 Reinstall the ADF (2 of 7) .............................................................................................................. 66

Figure 5-39 Reinstall the ADF (3 of 7) .............................................................................................................. 67

Figure 5-40 Reinstall the ADF (4 of 7) .............................................................................................................. 67

Figure 5-41 Reinstall the ADF (5 of 7) .............................................................................................................. 68

Figure 5-42 Reinstall the ADF (6 of 7) .............................................................................................................. 68

Figure 5-43 Reinstall the ADF (7 of 7) .............................................................................................................. 69

Figure 5-44 ADF height adjustment (1 of 6) ..................................................................................................... 70

Figure 5-45 ADF height adjustment (2 of 6) ..................................................................................................... 70

Figure 5-46 ADF height adjustment (3 of 6) ..................................................................................................... 70

Figure 5-47 ADF height adjustment (4 of 6) ..................................................................................................... 71

Figure 5-48 ADF height adjustment (5 of 6) ..................................................................................................... 71

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Figure 5-49 ADF height adjustment (6 of 6) ..................................................................................................... 72

Figure 5-50 Repair menu (1 of 11) ................................................................................................................... 73

Figure 5-51 Repair menu (2 of 11) ................................................................................................................... 74

Figure 5-52 Replacement scenario #1 (3 of 11) ............................................................................................... 75

Figure 5-53 Replacement scenario #2 (4 of 11) ............................................................................................... 76

Figure 5-54 Replacement scenario #3 (5 of 11) ............................................................................................... 77

Figure 5-55 Replacement scenario #4 (6 of 7) ................................................................................................. 78

Figure 5-56 Replacement scenario #5 (7 of 11) ............................................................................................... 79

Figure 5-57 Replacement scenario #6 (8 of 11) ............................................................................................... 80

Figure 5-58 Replacement scenario #7 (9 of 11) ............................................................................................... 81

Figure 5-59 Repair menu (10 of 11) ................................................................................................................. 82

Figure 5-60 Repair menu (11 of 11) ................................................................................................................. 83

Figure 5-61 Download factory NVRAM data (1 of 6) ........................................................................................ 84

Figure 5-62 Download factory NVRAM data (2 of 6) ........................................................................................ 84

Figure 5-63 Download factory NVRAM data (3 of 6) ........................................................................................ 85

Figure 5-64 Download factory NVRAM data (4 of 6) ........................................................................................ 85

Figure 5-65 Download factory NVRAM data (5 of 6) ........................................................................................ 86

Figure 5-66 Download factory NVRAM data (6 of 6) ........................................................................................ 86

Figure 5-67 Backup current NVRAM data (1 of 3) ........................................................................................... 87

Figure 5-68 Backup current NVRAM data (2 of 3) ........................................................................................... 87

Figure 5-69 Backup current NVRAM data (3 of 3) ........................................................................................... 88

Figure 5-70 Repair NVRAM data (1 of 5) ......................................................................................................... 89

Figure 5-71 Repair NVRAM data (2 of 5) ......................................................................................................... 90

Figure 5-72 Repair NVRAM data (3 of 5) ......................................................................................................... 91

Figure 5-73 Repair NVRAM data (4 of 5) ......................................................................................................... 92

Figure 5-74 Repair NVRAM data (5 of 5) ......................................................................................................... 93

Figure 5-75 Adjust NVRAM counter items (1 of 2) ........................................................................................... 94

Figure 5-76 Adjust NVRAM counter items (2 of 2) ........................................................................................... 95

Figure 5-77 ADF alignment (1 of 6) .................................................................................................................. 96

Figure 5-78 ADF alignment (2 of 6) .................................................................................................................. 97

Figure 5-79 ADF alignment (3 of 6) .................................................................................................................. 97

Figure 5-80 ADF alignment (4 of 6) .................................................................................................................. 97

Figure 5-81 ADF alignment (5 of 6) .................................................................................................................. 98

Figure 5-82 Create the factory calibration data for ADF-A (1 of 3) .................................................................. 99

Figure 5-83 Create the factory calibration data for ADF-A (2 of 3) .................................................................. 99

Figure 5-84 Create the factory calibration data for ADF-A (3 of 3) ................................................................ 100

Figure 5-85 Remove the ADF motor fan (1 of 2) ............................................................................................ 101

Figure 5-86 Remove the ADF motor fan (2 of 2) ............................................................................................ 101

Figure 5-87 Remove the ADF carriage fan ................................................................................................... 102

Figure 5-88 Remove the ADF input-tray lift-motor assembly (1 of 2) ............................................................. 103

Figure 5-89 Remove the ADF input-tray lift-motor assembly (2 of 2) ............................................................. 103

Figure 5-90 Remove the ADF exit-motor assembly (1 of 7) ........................................................................... 104

Figure 5-91 Remove the ADF exit-motor assembly (2 of 7) ........................................................................... 104

Figure 5-92 Remove the ADF exit-motor assembly (3 of 7) ........................................................................... 105

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Figure 5-93 Remove the ADF exit-motor assembly (4 of 7) ........................................................................... 105

Figure 5-94 Remove the ADF exit-motor assembly (5 of 7) ........................................................................... 106

Figure 5-95 Remove the ADF exit-motor assembly (6 of 7) ........................................................................... 106

Figure 5-96 Remove the ADF exit-motor assembly (7 of 7) ........................................................................... 107

Figure 5-97 Remove the ADF feed-motor assembly (1 of 4) ......................................................................... 108

Figure 5-98 Remove the ADF feed-motor assembly (2 of 4) ......................................................................... 108

Figure 5-99 Remove the ADF feed-motor assembly (3 of 4) ......................................................................... 109

Figure 5-100 Remove the ADF feed-motor assembly (4 of 4) ....................................................................... 109

Figure 5-101 Reinstall the ADF feed-motor drive belt (1 of 3) ....................................................................... 110

Figure 5-102 Reinstall the ADF feed-motor drive belt (2 of 3) ....................................................................... 110

Figure 5-103 Reinstall the ADF feed-motor drive belt (3 of 3) ....................................................................... 111

Figure 5-104 Reinstall the ADF feed-motor assembly (1 of 5) ....................................................................... 111

Figure 5-105 Reinstall the ADF feed-motor assembly (2 of 5) ....................................................................... 112

Figure 5-106 Reinstall the ADF feed-motor assembly (3 of 5) ....................................................................... 112

Figure 5-107 Reinstall the ADF feed-motor assembly (4 of 5) ....................................................................... 113

Figure 5-108 Reinstall the ADF feed-motor assembly (5 of 5) ....................................................................... 113

Figure 5-109 Remove the ADF pick-motor assembly (1 of 5) ........................................................................ 114

Figure 5-110 Remove the ADF pick-motor assembly (2 of 5) ........................................................................ 114

Figure 5-111 Remove the ADF pick-motor assembly (3 of 5) ........................................................................ 115

Figure 5-112 Remove the ADF pick-motor assembly (4 of 5) ........................................................................ 115

Figure 5-113 Remove the ADF pick-motor assembly (5 of 5) ........................................................................ 116

Figure 5-114 Reinstall the ADF pick-motor assembly (1 of 5) ........................................................................ 116

Figure 5-115 Reinstall the ADF pick-motor assembly (2 of 5) ........................................................................ 117

Figure 5-116 Reinstall the ADF pick-motor assembly (3 of 5) ........................................................................ 117

Figure 5-117 Reinstall the ADF pick-motor assembly (4 of 5) ........................................................................ 118

Figure 5-118 Reinstall the ADF pick-motor assembly (5 of 5) ........................................................................ 118

Figure 5-119 Remove the upper multi-pick sensor PCA (1 of 3) ................................................................... 119

Figure 5-120 Remove the upper multi-pick sensor PCA (2 of 3) ................................................................... 120

Figure 5-121 Remove the upper multi-pick sensor PCA (3 of 3) ................................................................... 120

Figure 5-122 Remove the lower multi-pick sensor PCA (1 of 2) .................................................................... 121

Figure 5-123 Remove the lower multi-pick sensor PCA (2 of 2) .................................................................... 122

Figure 5-124 Remove the ADF controller PCA (1 of 2) .................................................................................. 123

Figure 5-125 Remove the ADF controller PCA (2 of 2) .................................................................................. 124

Figure 5-126 Remove the imprinter PCA (1 of 2) ........................................................................................... 125

Figure 5-127 Remove the imprinter PCA (2 of 2) ........................................................................................... 126

Figure 5-128 Reinstall the imprinter PCA (1 of 4) .......................................................................................... 126

Figure 5-129 Reinstall the imprinter PCA (2 of 4) .......................................................................................... 127

Figure 5-130 Reinstall the imprinter PCA (3 of 4) .......................................................................................... 127

Figure 5-131 Reinstall the imprinter PCA (4 of 4) .......................................................................................... 128

Figure 5-132 Remove the input-tray sensor ................................................................................................... 129

Figure 5-133 Remove the flatbed scan position sensor (1 of 2) .................................................................... 130

Figure 5-134 Remove the flatbed scan position sensor (2 of 2) .................................................................... 131

Figure 5-135 Reinstall the flatbed scan position sensor ................................................................................ 131

Figure 5-136 Remove the exit 1 sensor ......................................................................................................... 133

xiv ENWW

Figure 5-137 Remove the exit 2 sensor ......................................................................................................... 134

Figure 5-138 Remove the pick-up roller sensor (1 of 4) ................................................................................. 135

Figure 5-139 Remove the pick-up roller sensor (2 of 4) ................................................................................. 135

Figure 5-140 Remove the pick-up roller sensor (3 of 4) ................................................................................. 136

Figure 5-141 Remove the pick-up roller sensor (4 of 4) ................................................................................. 136

Figure 5-142 Remove the elevator arm sensor .............................................................................................. 137

Figure 5-143 Remove the background solenoid sensor (1 of 2) .................................................................... 138

Figure 5-144 Remove the background solenoid sensor (2 of 2) .................................................................... 138

Figure 5-145 Remove the paper-present sensor ........................................................................................... 139

Figure 5-146 Remove the registration sensor ................................................................................................ 140

Figure 5-147 Remove the jam door 1 sensor ................................................................................................. 141

Figure 5-148 Remove jam door 2 sensor ....................................................................................................... 142

Figure 5-149 Remove the jam door 3 sensor ................................................................................................. 143

Figure 5-150 Remove the imprinter paper-present sensor (1 of 2) ................................................................ 144

Figure 5-151 Remove the imprinter paper-present sensor (2 of 2) ................................................................ 145

Figure 5-152 Remove the ADF scan position sensor .................................................................................... 146

Figure 5-153 Remove the ADF bottom corner outer paper path guide (1 of 2) ............................................. 147

Figure 5-154 Remove the ADF bottom corner outer paper path guide (2 of 2) ............................................. 147

Figure 5-155 Reinstall the ADF bottom corner outer paper path guide ......................................................... 148

Figure 5-156 Remove the ADF bottom corner inner paper path guide (1 of 2) .............................................. 149

Figure 5-157 Remove the ADF bottom corner inner paper path guide (2 of 2) .............................................. 149

Figure 5-158 Remove the ADF cal-strip assembly (1 of 5) ............................................................................ 150

Figure 5-159 Remove the ADF cal-strip assembly (2 of 5) ............................................................................ 150

Figure 5-160 Remove the ADF cal-strip assembly (3 of 5) ............................................................................ 151

Figure 5-161 Remove the ADF cal-strip assembly (4 of 5) ............................................................................ 151

Figure 5-162 Remove the ADF cal-strip assembly (5 of 5) ............................................................................ 152

Figure 5-163 Reinstall the ADF cal-strip assembly (1 of 7) ............................................................................ 152

Figure 5-164 Reinstall the ADF cal-strip assembly (2 of 7) ............................................................................ 153

Figure 5-165 Reinstall the ADF cal-strip assembly (3 of 7) ............................................................................ 153

Figure 5-166 Reinstall the ADF cal-strip assembly (4 of 7) ............................................................................ 154

Figure 5-167 Reinstall the ADF cal-strip assembly (5 of 7) ............................................................................ 154

Figure 5-168 Reinstall the ADF cal-strip assembly (6 of 7) ............................................................................ 155

Figure 5-169 Reinstall the ADF cal-strip assembly (7 of 7) ............................................................................ 155

Figure 5-170 Remove the ADF exit inner paper path guide (1 of 4) .............................................................. 156

Figure 5-171 Remove the ADF exit inner paper path guide (2 of 4) .............................................................. 157

Figure 5-172 Remove the ADF exit inner paper path guide (3 of 4) .............................................................. 157

Figure 5-173 Remove the ADF exit inner paper path guide (4 of 4) .............................................................. 158

Figure 5-174 Remove the ADF top corner inner paper path guide (1 of 2) .................................................... 159

Figure 5-175 Remove the ADF top corner inner paper path guide (2 of 2) .................................................... 159

Figure 5-176 Remove the lower multi-pick sensor cover (1 of 3) ................................................................... 160

Figure 5-177 Remove the lower multi-pick sensor cover (2 of 3) ................................................................

Figure 5-178 Remove the lower multi-pick sensor cover (3 of 3) ................................................................... 161

Figure 5-179 Remove the flatbed scan position sensor arm (1 of 2) ............................................................. 162

Figure 5-180 Remove the flatbed scan position sensor arm (2 of 2) ............................................................. 163

... 161

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Figure 5-181 Reinstall the flatbed scan position sensor arm (1 of 3) ............................................................. 163

Figure 5-182 Reinstall the flatbed scan position sensor arm (2 of 3) ............................................................. 164

Figure 5-183 Reinstall the flatbed scan position sensor arm (3 of 3) ............................................................. 164

Figure 5-184 Remove the exit 1 sensor arm .................................................................................................. 165

Figure 5-185 Remove the exit 2 sensor arm (1 of 3) ..................................................................................... 166

Figure 5-186 Remove the exit 2 sensor arm (2 of 3) ..................................................................................... 167

Figure 5-187 Remove the exit 2 sensor arm (3 of 3) ..................................................................................... 167

Figure 5-188 Remove the paper-present-sensor arm (1 of 2) ....................................................................... 168

Figure 5-189 Remove the paper-present-sensor arm (2 of 2) ....................................................................... 168

Figure 5-190 Remove the input-tray-elevator arm (1 of 5) ............................................................................. 169

Figure 5-191 Remove the input-tray-elevator arm (2 of 5) ............................................................................. 169

Figure 5-192 Remove the input-tray-elevator arm (3 of 5) ............................................................................. 170

Figure 5-193 Remove the input-tray-elevator arm (4 of 5) ............................................................................. 170

Figure 5-194 Remove the input-tray-elevator arm (5 of 5) ............................................................................. 171

Figure 5-195 Remove the registration sensor arm (1 of 2) ............................................................................ 172

Figure 5-196 Remove the registration sensor arm (2 of 2) ............................................................................ 173

Figure 5-197 Remove the scan position sensor arm (1 of 2) ......................................................................... 174

Figure 5-198 Remove the scan position sensor arm (2 of 2) ......................................................................... 174

Figure 5-199 Remove the pickup-roller spring ............................................................................................... 175

Figure 5-200 Remove the separation-pad spring ........................................................................................... 176

Figure 5-201 Remove the ADF input-tray assembly (1 of 3) .......................................................................... 177

Figure 5-202 Remove the ADF input-tray assembly (2 of 3) .......................................................................... 177

Figure 5-203 Remove the ADF input-tray assembly (3 of 3) .......................................................................... 178

Figure 5-204 Remove the ADF output tray (1 of 3) ........................................................................................ 179

Figure 5-205 Remove the ADF output tray (2 of 3) ........................................................................................ 179

Figure 5-206 Remove the ADF output tray (3 of 3) ........................................................................................ 180

Figure 5-207 Reinstall the ADF output tray (1 of 4) ....................................................................................... 181

Figure 5-208 Reinstall the ADF output tray (2 of 4) ....................................................................................... 181

Figure 5-209 Reinstall the ADF output tray (3 of 4) ....................................................................................... 182

Figure 5-210 Reinstall the ADF output tray (4 of 4) ....................................................................................... 182

Figure 5-211 Remove the pickup-roller cover (1 of 3) .................................................................................... 183

Figure 5-212 Remove the pickup-roller cover (2 of 3) .................................................................................... 183

Figure 5-213 Remove the pickup-roller cover (3 of 3) .................................................................................... 184

Figure 5-214 Remove the ADF hinge limiters ................................................................................................ 185

Figure 5-215 Remove ADF jam door 3 (1 of 4) .............................................................................................. 186

Figure 5-216 Remove ADF jam door 3 (2 of 4) .............................................................................................. 186

Figure 5-217 Remove ADF jam door 3 (3 of 4) .............................................................................................. 187

Figure 5-218 Remove ADF jam door 3 (4 of 4) .............................................................................................. 187

Figure 5-219 Remove the paper present sensor and imprinter PCA holder (1 of 3) ...................................... 188

Figure 5-220 Remove the paper present sensor and imprinter PCA holder (2 of 3) ...................................... 189

Figure 5-221 Remove the paper present sensor and imprinter PCA holder (3 of 3) ...................................... 189

Figure 5-222 Remove the ADF shingle wall (1 of 4) ...................................................................................... 190

Figure 5-223 Remove the ADF shingle wall (2 of 4) ...................................................................................... 191

Figure 5-224 Remove the ADF shingle wall (3 of 4) ...................................................................................... 191

xvi ENWW

Figure 5-225 Remove the ADF shingle wall (4 of 4) ...................................................................................... 192

Figure 5-226 Remove the A4 paper-stop (1 of 2) .......................................................................................... 193

Figure 5-227 Remove the A4 paper-stop (2 of 2) .......................................................................................... 193

Figure 5-228 Remove the ADF background-solenoid assembly (1 of 5) ....................................................... 194

Figure 5-229 Remove the ADF background-solenoid assembly (2 of 5) ....................................................... 194

Figure 5-230 Remove the ADF background-solenoid assembly (3 of 5) ....................................................... 195

Figure 5-231 Remove the ADF background-solenoid assembly (4 of 5) ....................................................... 195

Figure 5-232 Remove the ADF background-solenoid assembly (5 of 5) ....................................................... 196

Figure 5-233 Reinstall the ADF background-solenoid assembly (1 of 3 ........................................................ 197

Figure 5-234 Reinstall the ADF background-solenoid assembly (1 of 3) ....................................................... 197

Figure 5-235 Reinstall the ADF background-solenoid assembly (3 of 3) ....................................................... 198

Figure 5-236 Imprinter carriage and FFC (1 of 3) ......................................................................................... 199

Figure 5-237 Imprinter carriage and FFC (2 of 3) .......................................................................................... 199

Figure 5-238 Imprinter carriage and FFC (3 of 3) .......................................................................................... 200

Figure 5-239 Remove the scanner carriage-motor fan (1 of 5) ...................................................................... 203

Figure 5-240 Remove the scanner carriage-motor fan (2 of 5) ...................................................................... 203

Figure 5-241 Remove the scanner carriage-motor fan (3 of 5) ...................................................................... 204

Figure 5-242 Remove the scanner carriage-motor fan (4 of 5) ...................................................................... 204

Figure 5-243 Remove the scanner carriage-motor fan (5 of 5) ...................................................................... 205

Figure 5-244 Remove the scanner carriage fan (1 of 3) ................................................................................ 206

Figure 5-245 Remove the scanner carriage fan (2 of 3) ................................................................................ 206

Figure 5-246 Remove the scanner carriage fan (3 of 3) ................................................................................ 207

Figure 5-247 Remove the scanner carriage motor (1 of 5) ............................................................................ 208

Figure 5-248 Remove the scanner carriage motor (2 of 5) ............................................................................ 208

Figure 5-249 Remove the scanner carriage motor (3 of 5) ............................................................................ 209

Figure 5-250 Remove the scanner carriage motor (4 of 5) ............................................................................ 209

Figure 5-251 Remove the scanner carriage motor (5 of 5) ............................................................................ 210

Figure 5-252 Remove the control-panel PCA (1 of 3) .................................................................................... 211

Figure 5-253 Remove the control-panel PCA (2 of 3) .................................................................................... 211

Figure 5-254 Remove the control-panel PCA (3 of 3) .................................................................................... 212

Figure 5-255 Remove the scanner controller PCA (1 of 4) ............................................................................ 213

Figure 5-256 Remove the scanner controller PCA (2 of 4) ............................................................................ 214

Figure 5-257 Remove the scanner controller PCA (3 of 4) ............................................................................ 214

Figure 5-258 Remove the scanner controller PCA (4 of 4) ............................................................................ 215

Figure 5-259 Remove the power-supply PCA (1 of 6) ................................................................................... 216

Figure 5-260 Remove the power-supply PCA (2 of 6) ................................................................................... 217

Figure 5-261 Remove the power-supply PCA (3 of 6) ................................................................................... 217

Figure 5-262 Remove the power-supply PCA (4 of 6) ................................................................................... 218

Figure 5-263 Remove the power-supply PCA (5 of 6) ................................................................................... 218

Figure 5-264 Remove the power-supply PCA (6 of 6) ................................................................................... 219

Figure 5-265 Remove the scanner-glass assembly (1 of 2) .......................................................................... 220

Figure 5-266 Remove the scanner-glass assembly (2 of 2) .......................................................................... 220

Figure 5-267 Remove the ADF power-cable assembly (1 of 3) ..................................................................... 221

Figure 5-268 Remove the ADF power-cable assembly (2 of 3) ..................................................................... 221

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Figure 5-269 Remove the ADF power-cable assembly (3 of 3) ..................................................................... 222

Figure 5-270 Remove the carriage-motor cable ............................................................................................ 223

Figure 5-271 Remove the power switch and power receptacle assembly (1 of 3) ......................................... 224

Figure 5-272 Remove the power switch and power receptacle assembly (2 of 3) ......................................... 224

Figure 5-273 Remove the power switch and power receptacle assembly (3 of 3) ......................................... 225

Figure 6-1 Control-panel LEDs ....................................................................................................................... 232

Figure 6-2 Main screen .................................................................................................................................. 235

Figure 6-3 Scan dialog box ............................................................................................................................ 237

Figure 6-4 Sensor in motion tab ..................................................................................................................... 239

Figure 6-5 Sensor tab ..................................................................................................................................... 241

Figure 6-6 Control panel check dialog box ..................................................................................................... 244

Figure 6-7 ADF feed test dialog box ............................................................................................................... 246

Figure 6-8 Actuators dialog box ..................................................................................................................... 248

Figure 6-9 Get/SetNVRAMValue(String) tab .................................................................................................. 251

Figure 6-10 Get/SetNVRAMValue(String) tab ................................................................................................ 252

Figure 6-11 Repair menu ............................................................................................................................... 254

Figure 6-12 Version information dialog box ................................................................................................... 255

Figure 6-13 Major components (1 of 3) .......................................................................................................... 256

Figure 6-14 Major components (2 of 3) .......................................................................................................... 257

Figure 6-15 Major components (3 of 3) .......................................................................................................... 257

Figure 6-16 ADF motors and fans (1 of 2) ...................................................................................................... 258

Figure 6-17 ADF motors and fans (2 of 2) ...................................................................................................... 259

Figure 6-18 ADF PCAs ................................................................................................................................... 260

Figure 6-19 Scanner PCAs ............................................................................................................................ 261

Figure 6-20 Clear jams from the ADF (1 of 5) ................................................................................................ 269

Figure 6-21 Clear jams from the ADF (2 of 5) ................................................................................................ 269

Figure 6-22 Clear jams from the ADF (3 of 5) ................................................................................................ 270

Figure 6-23 Clear jams from the ADF (4 of 5) ................................................................................................ 270

Figure 6-24 Clear jams from the ADF (5 of 5) ................................................................................................ 271

Figure 7-1 ADF assemblies (1 of 14) ............................................................................................................. 290

Figure 7-2 ADF assemblies (2 of 14) ............................................................................................................. 292

Figure 7-3 ADF assemblies (3 of 14) ............................................................................................................. 294

Figure 7-4 ADF assemblies (4 of 14) ............................................................................................................. 296

Figure 7-5 ADF assemblies (5 of 14) ............................................................................................................. 298

Figure 7-6 ADF assemblies (6 of 14) ............................................................................................................. 300

Figure 7-7 ADF assemblies (7 of 14) ............................................................................................................. 302

Figure 7-8 ADF assemblies (8 of 14) ............................................................................................................. 304

Figure 7-9 ADF assemblies (9 of 14) ............................................................................................................. 306

Figure 7-10 ADF assemblies (10 of 14) ......................................................................................................... 308

Figure 7-11 ADF assemblies (11 of 14) ......................................................................................................... 310

Figure 7-12 ADF assemblies (12 of 14) ......................................................................................................... 312

Figure 7-13 ADF assemblies (13 of 14) ......................................................................................................... 314

Figure 7-14 ADF assemblies (14 of 14) ......................................................................................................... 316

Figure 7-15 Flatbed scanner assemblies (1 of 9) ........................................................................................... 318

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Figure 7-16 Flatbed scanner assemblies (2 of 9) ........................................................................................... 320

Figure 7-17 Flatbed scanner assemblies (3 of 9) ........................................................................................... 322

Figure 7-18 Flatbed scanner assemblies (4 of 9) ........................................................................................... 324

Figure 7-19 Flatbed scanner assemblies (5 of 9) ........................................................................................... 326

Figure 7-20 Flatbed scanner assemblies (6 of 9) ........................................................................................... 328

Figure 7-21 Flatbed scanner assemblies (7 of 9) ........................................................................................... 330

Figure 7-22 Flatbed scanner assemblies (8 of 9) ........................................................................................... 332

Figure 7-23 Flatbed scanner assemblies (9 of 9) ........................................................................................... 334

Figure A-1 Repack the product (1 of 3) .......................................................................................................... 356

Figure A-2 Repack the product (2 of 3) .......................................................................................................... 356

Figure A-3 Repack the product (3 of 3) .......................................................................................................... 357

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1 Product basics

Quick access to product information

●

Product basics

●

System requirements

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Paper handling

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ENWW 1

Quick access to product information

Use the following Web site to find information about the product:

www.hp.com/support

●

Table 1-1 Product guides

Guide Description

User Guide The scanner User Guide is the primary source for scanner information. It provides

information about using, maintaining, and troubleshooting the scanner.

View the User Guide in the installed (system) language

1. Click Start.

2. Point to Programs or All Programs.

3. Point to Scanjet, and then point to N9120.

4. Click User Guide.

View the User Guide in a different language

1. Insert the HP software CD that came with the scanner into the computer compact-disk

drive. Wait for the installation dialog box to appear.

2. Click View or print guides.

3. Click a language for the User Guide.

HP Smart Document Scan software help

HP Scanner Tools Utility help The HP Scanner Tools Utility help explains the scanner settings, information about scanner

The HP Smart Document Scan software help explains how to use HP Smart Document Scan software features such as creating and editing profiles.

1. Double-click the HP Smart Document Scan icon on your computer desktop.

2. Click Help on the menu bar.

status and maintenance, and how to assign functionality to the scanner front-panel buttons.

1. Press the Tools button on the scanner front panel.

2. Click Help in HP Scanner Tools Utility dialog box (this dialog box appears on the

computer that is connected to the HP Scanjet N9120.

2 Chapter 1 Product basics ENWW

Product basics

Product features

Table 1-2 Product specifications

Description Specification

Scanner type Scanner with ADF

Overall size 692 x 558 x 343 mm (27.3 x 22.0 x 13.5 in)

Weight 38.5 kg (85 lb)

Scanning element

Interface USB 2.0 high speed (compatible with USB 1.1)

Optical resolution

AC power 100–240 V~, 50/60 Hz, 1.8 A

Power consumption

Energy information

Charge-coupled device (CCD)

600 x 600 dpi hardware

For power consumption information, see the regulatory_supplement.htm file on the HP Scanning Software CD.

To learn if your HP scanner is ENERGY STAR® qualified, go to www.hp.com, select your country/region, and then search on Energy Star.

ENWW Product basics 3

Product walkaround

Front and right-side view

Figure 1-1 Front and right-side view

1 Front panel

2 ADF

3 ADF input tray

4 ADF output tray

5 Latch for opening the ADF jam door 1

6 Power switch

4 Chapter 1 Product basics ENWW

Back view

Figure 1-2 Back view

1 Power receptacle

2 USB port

Side view (left)

Figure 1-3 Side view (left)

1 Scanner carriage lock

ENWW Product basics 5

Model and serial numbers

The model and serial numbers are listed on identification labels located on the ADF and flatbed scanner.

Figure 1-4 Model and serial number (1 of 2)

Figure 1-5 Model and serial number (2 of 2)

NOTE: If the product is owned by the U.S. government, the ADF and flatbed scanner have a special

serial-number designation. Replacement components for these products must have a similar serialnumber designation.

6 Chapter 1 Product basics ENWW

Control-panel walkaround

Figure 1-6 Control-panel features

Table 1-3 Control-panel features

Item Icon Button name Description

1 Copy By default, print the number of copies currently configured in

2 Scan By default, start a scan that uses the HP Smart Document Scan

HP Document Copy.

Alternatively, start the scanning software that is assigned to this button.

software profile that is assigned to this button.

Alternatively, start the scanning software that is assigned to this button.

3 Cancel Cancel a scan or copy in progress.

4 Tools Open the HP Scanner Tools Utility where you can do the following

tasks:

Associate the scanner control-panel buttons with scanning

●

software.

Configure the buttons on the scanner front panel.

●

Manage the imprinter.

●

View information about scanner settings, status, and

●

maintenance.

5 Attention LED The Attention LED provides status information about the scanner.

6 Power Save Press the Power Save button to put the scanner in Power Save

mode when you are not using the scanner. When you are ready to begin scanning again, press the Power Save button to wake up the scanner.

ENWW Product basics 7

Supported product software

Supported operating systems

The product supports the following operating systems:

Microsoft® Windows 2000

●

Windows® XP Home/Professional

●

Windows Vista®

●

Linux 2.4 and 2.6 Kernel Available

●

Supported scanner drivers

The product supports the following scanner drivers:

Twain

●

ISIS

●

WIA

●

Supported scanner-management software

HP Scanning Software CD

HP Scanner Tools Utility

●

HP Smart Document Scan

●

Kofax VRS Pro

●

Third-party document-management software

●

8 Chapter 1 Product basics ENWW

System requirements

The host computer must meet the minimum system hardware requirements to load and utilize the inbox software.

Minimum system hardware requirements:

●

1.4 GHz processor

◦

600 MB free hard disk space

◦

USB 2.0 and higher

◦

CD-ROM drive

◦

1024 x 768 SVGA monitor, 16-bit color

◦

HP recommends that the host computer system hardware meet the following requirements to

●

assure the optimum performance of the scanner at the quoted speed specifications.

Recommended system hardware requirements:

USB 1.1 and higher

◦

CD-ROM drive

◦

1024 x 768 SVGA monitor, 16-bit color

◦

80 MB (drivers only)

◦

300 MB (minimum) free hard disk space

◦

For Microsoft Windows XP Home, Windows XP Professional or Windows 2000:

●

1 GB RAM (recommended)

◦

256 MB RAM (minimum)

◦

500 MHz processor

◦

Internet Explorer 6 and higher

◦

For Windows Vista:

●

1 GB RAM (recommended)

◦

512 MB RAM (minimum)

◦

800 MHz processor

◦

Microsoft Internet Explorer 7 and higher

◦

ENWW System requirements 9

Paper handling

ADF specifications

Table 1-4 ADF specifications

Description Specification

Paper-tray capacity

Minimum paper size 70 x 148 mm (2.75 x 5.8 in)

Maximum paper size 300 x 864 mm (11.8 x 34 in)

Minimum paper weight

Media specifications

The ADF supports the following widths, lengths, and weights of paper.

Table 1-5 Media specifications

Description Specification

Width 70–300 mm (2.75–11.8 in)

Length 148–864 mm (5.8–34 in)

Weight

NOTE: The ADF input tray supports up to 200 sheets of 75 g/m2 (20 lb) paper.

49–120 g/m

(13–32 lb)

200 sheets of 75 g/m2 (20 lb)

49 g/m2 (13 lb)

120 g/m

(32 lb)

10 Chapter 1 Product basics ENWW

Media to avoid

Scanning certain types of documents through the ADF might result in jams or damage to the document. HP recommends scanning these types of documents by using the scanner only:

Wrinkled or creased documents

●

Torn documents

●

Carbon paper

●

Extremely thin, translucent paper

●

Photos

●

Papers that are stuck together

●

Curled documents

●

Documents with paperclips or staples

●

Coated paper

●

Paper with adhesive notes or flags attached

●

Overhead transparencies

●

Paper with wet substances such as glue or correction fluid

●

ENWW Paper handling 11

12 Chapter 1 Product basics ENWW

2 Installation and configuration

Prepare the site

●

Unpack the device

●

Install the software

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ENWW 13

Prepare the site

The scanner must be installed in a well-ventilated, dust-free area. Place the product on a sturdy, level surface.

For information about product specifications, see

Specifications on page 359.

CAUTION: To avoid injury, use two people to unpack and lift the scanner.

Verify that there is enough clearance to use and maintain the scanner.

Figure 2-1 Site dimensions

110 mm

4.33 in

350 mm

13.78 in 130 mm

5.12 in

105 mm

4.13 in

14 Chapter 2 Installation and configuration ENWW

Unpack the device

1. Unlock the box.

Figure 2-2 Unpack the device (1 of 9)

2. Remove the top of the box.

Figure 2-3 Unpack the device (2 of 9)

ENWW Unpack the device 15

3. Remove the top packing material, and then remove all remaining packing material and tape from

the outside of the ADF.

Figure 2-4 Unpack the device (3 of 9)

4. Remove the scanner from the box.

CAUTION: To avoid injury, use two people to lift the device from the box.

Figure 2-5 Unpack the device (4 of 9)

38.5 kg 85 lbs

5. Take an inventory of the contents.

The following items should be included with each HP Scanjet N9120 scanner.

NOTE: The contents might vary by country/region.

16 Chapter 2 Installation and configuration ENWW

Figure 2-6 Unpack the device (5 of 9)

Table 2-1 Box contents

Item Description

1 HP Scanjet N9120 scanner

2 Scanning software CDs

3 Power cable

4 USB cable

5 Getting Started Guide

6. Place the product on a sturdy, level surface.

7. Release the carriage lock.

Figure 2-7 Unpack the device (6 of 9)

8. Remove the spacer tape from ADF jam door 1 and ADF jam door 2.

Figure 2-8 Unpack the device (7 of 9)

ENWW Unpack the device 17

9. Open ADF jam door 1, and then remove the spacers.

Figure 2-9 Unpack the device (8 of 9)

10. Open ADF jam door 2, and then remove the spacers.

Figure 2-10 Unpack the device (9 of 9)

11. Remove any remaining packing material, and then close ADF jam door 1 and ADF jam door 2.

18 Chapter 2 Installation and configuration ENWW

Install the software

CAUTION: Do not connect the USB cable until you are prompted during the software installation.

1. Decide what software to install.

If you will be using the scanner with document-management and scanning software that you

●

already own, you only need to install the HP Scanjet utilities drivers and tools.

If you do not already have document-management and scanning software, you can use the

●

software that is shipped with the scanner. Read the onscreen descriptions of the software during the installation to decide what software to install.

2. Insert the HP Scanning Software CD into the computer CD drive. Wait for the installation dialog

box to appear.

3. Click Install Software, and then follow the instructions on the screen.

4. Use the power cable to connect the scanner to an electrical outlet.

Figure 2-11 Electrical connection

5. Use the USB cable that came with the scanner to connect the scanner to the computer.

CAUTION: Be sure that you install the HP scanning software before connecting the scanner to

your computer with the USB cable.

NOTE: HP recommends using a USB port on the back of the computer for a more reliable

connection to the scanner.

Figure 2-12 USB connection

ENWW Install the software 19

6. Press the power switch on the right side of the scanner to the on position.

Figure 2-13 Power switch

7. Test the installation. Place a single document page in the ADF, and then do one of the following:

If you installed the HP Smart Document Scan software, press the Scan button.

●

If you did not install the HP Smart Document Scan software, scan from the software that you

●

intend to use for scanning.

If the scan does not proceed as expected, uninstall and reinstall the HP Scanjet utilities, and then try scanning again. If reinstalling the utilities does not work, see the scanning software documentation for information on how to troubleshoot that program.

For information on uninstalling and reinstalling the HP Scanjet utilities, see the product user guide.

20 Chapter 2 Installation and configuration ENWW

3 Manage and maintain

Manage supplies

●

Clean the product

●

ENWW 21

Manage supplies

HP Scanner Tools Utility scanner maintenance information

The Maintenance tab of the HP Scanner Tools Utility displays the scanner usage and maintenance history. You can use this tab to record scanner maintenance.

The Imprinter tab of the HP Scanner Tools Utility displays information about the scanner imprinter and the imprinter print cartridge. You can use this tab to record that the print cartridge has been replaced.

To open the HP Scanner Tools Utility, press the Tools button on the scanner front panel.

NOTE: For detailed information on using the HP Scanner Tools Utility, see the HP Scanner Tools

Utility help.

Parts life expectancy

Table 3-1 Replacement guidelines

Item Guideline How to

ADF base reflector The ADF base reflector needs to be

replaced only if it is damaged or if you see vertical streaks on the scanned images.

NOTE: Before you replace the white

ADF base reflector, try cleaning the product. See

on page 23.

Pickup-roller assembly The pickup-roller assembly needs to be

replaced after 100,000 scans.

NOTE: HP recommends that you clean

the pickup roller every 50,000 pages. See

Clean the product on page 23.

Separation-pad assembly The separation pad needs to be replaced

after 100,000 scans.

Imprinter cartridge Replace the imprinter cartridge when it is

out of ink.

Fan filters The fan filters should be replaced when

a user-replaceable part is installed or when filters are damaged or worn from cleaning.

Clean the product

To replace the ADF base reflector, see

ADF base reflector on page 45.

To replace the pickup-roller assembly, see

Pickup-roller assembly

on page 47.

To replace the separation-pad assembly, see

Separation-pad assembly

on page 49.

To replace the imprinter cartridge, see

Imprinter cartridge on page 42.

To replace a fan filter, see Fan filters

on page 44.

22 Chapter 3 Manage and maintain ENWW

Clean the product

During the scanning process, paper and dust particles can accumulate inside the product. Over time, this buildup can cause problems, such as specks or streaks on scanned documents.

Occasional cleaning of the product helps ensure high-quality scans. The amount of care necessary depends upon several factors, including the amount of use and the environment. You should perform routine cleaning as necessary.

Routine cleaning and maintenance should include cleaning the ADF, the scanner glass, and the fan filters.

Clean the exterior

Use a soft, damp, lint-free cloth to wipe dust, smudges, and stains off of the exterior of the product.

ENWW Clean the product 23

Clean the ADF

NOTE: The customer should be advised to clean the ADF only when scanned documents show

streaks, specks, or other signs of degradation that can be directly attributed to the scanning process.

The ADF requires periodic maintenance depending on the amount of use and the type of paper that is fed through it. Clean the ADF under the following conditions:

The ADF has trouble feeding documents.

●

Vertical streaks appear in images scanned by the ADF.

●

Scanned documents are dusty, dirty, or have pencil writing (graphite) on them.

●

The environment is dusty.

●

Clean the ADF:

1. Press the power switch to the off position, and then disconnect the USB cable and power cable

from the scanner.

2. Open the ADF.

Figure 3-1 Clean the ADF (1 of 5)

24 Chapter 3 Manage and maintain ENWW

3. Clean the clear scanning strip on the scanner bed. Wipe the clear area with a clean, dry, lint-free

cloth.

CAUTION: Use only glass cleaner to clean the scanning strip. Avoid cleaners that contain

abrasives, acetone, benzene, or carbon tetrachloride, all of which can damage the scanner glass. Avoid isopropyl alcohol because it can leave streaks on the glass.

Do not spray the glass cleaner directly on the glass. If too much glass cleaner is applied, the cleaner could leak under the glass and damage the scanner.

Figure 3-2 Clean the ADF (2 of 5)

4. Close the ADF.

5. Open jam door 1 (callout 1) and jam door 2.

Figure 3-3 Clean the ADF (3 of 5)

ENWW Clean the product 25

6. Locate the white strip (callout 1) on jam door 2 and the scan window (callout 2) inside the ADF,

and then wipe both of these areas with a clean, dry, lint-free cloth.

Figure 3-4 Clean the ADF (4 of 5)

7. Wipe the rollers with a clean, damp, lint-free cloth.

Figure 3-5 Clean the ADF (5 of 5)

8. Wait several minutes for the rollers to dry, and then close jam door 1 and jam door 2.

9. Reconnect the USB cable and power cable to the scanner, and then press the power switch to the

on position.

26 Chapter 3 Manage and maintain ENWW

Clean the scanner glass

Clean the scanner glass under the following conditions:

Streaks, scratches, or spots appear in images scanned from the scanner glass.

●

Dusty or dirty documents have been scanned using the glass.

●

The environment is dusty.

●

Clean the scanner glass:

1. Press the power switch to the off position, and then disconnect the USB cable and power cable

from the scanner.

2. Open the ADF.

Figure 3-6 Clean the scanner glass

3. Clean the glass with a soft, lint-free cloth that has been sprayed with a mild glass cleaner.

CAUTION: Use only glass cleaner to clean the scanner glass. Avoid cleaners that contain

abrasives, acetone, benzene, or carbon tetrachloride, all of which can damage the scanner glass. Avoid isopropyl alcohol because it can leave streaks on the glass.

Do not spray the glass cleaner directly on the glass. If too much glass cleaner is applied, the cleaner could leak under the glass and damage the scanner.

4. Dry the glass with a dry, soft, lint-free cloth.

5. Reconnect the USB cable and power cable to the scanner, and then press the power switch to the

on position.

ENWW Clean the product 27

Clean the fan filters

The flatbed scanner includes two fan filters. These filters prevent dust and debris from entering the fans. If the scanner is in a dirty or dusty environment, clean the filters monthly.

NOTE: The ADF filter cover is not removable.

1. Press the power switch to the off position, and then disconnect the USB cable and power cable

from the scanner.

2. Remove the filter cover.

Figure 3-7 Clean the scanner fan filters (1 of 2)

3. Clean the filter in one of the following ways:

Use compressed air to blow the debris off of the filter.

●

Use a vacuum to remove the debris from the filter.

●

Rinse the filter with water.

●

4. Inspect the filter cover. If it is dirty, use a clean, damp, lint-free cloth to remove the dirt.

5. Make sure that the filter and the filter cover are completely dry.

CAUTION: The filter must be completely dry before you reinstall it in the product and turn the

power on. If the filter is damp, the fan could pull moisture into the product and cause damage to the product.

6. Place the clean, dry filter in the filter cover, and then replace the cover on the scanner.

Figure 3-8 Clean the scanner fan filters (2 of 2)

7. Reconnect the USB cable and power cable to the scanner, and then press the power switch to the

on position.

28 Chapter 3 Manage and maintain ENWW

4 Theory of operation

Basic operation

●

Modes and control-panel indicators

●

Circuit board assemblies

●

Fans

●

ADF feed system

●

Service block diagram

●

ENWW 29

Basic operation

The Scanjet N9120 consists of two main assemblies.

Table 4-1 Main assemblies

Name Description

ADF

Flatbed scanner

ADF motor control circuitry

●

Media transport mechanism

●

Ultrasonic multi-pick detection

●

Imprinter

●

Optical assembly

●

Scanner control circuitry

●

System power supply

●

Control panel

●

Optical assembly

●

30 Chapter 4 Theory of operation ENWW

Modes and control-panel indicators

Table 4-2 Modes and control-panel indicators

Mode Description

Power on The period of time from when the power switch is turned on until the green LED illuminates the sleep button

on the control panel.

Initialization/ Warm-up

Scan The period of time immediately following the request for a scan, from either the ADF or the scanner. This

Sleep This mode starts in either of the following ways: The user presses the sleep button on the control panel, or

Error The period of time in which the scanner is unable to complete the task it was directed to perform. This can

Maintenance event

The period of time after the power-on sequence or sleep mode wake-up event and before the scanner is ready to scan. During this time, the scanner and ADF initialization sequences are completed, the Cold Cathode Fluorescent Lamps (CCFL) are turned on and complete their warm up cycle, scanner and ADF calibration are completed, ADF motors are enabled, and sensor states are verified to ensure that no media is in the media transport path. This period of time is indicated by a slowly blinking green attention LED on the control panel.

period of time is indicated by a quickly blinking green attention LED on the control panel.

the scanner is not used for 15 minutes or longer. This period of time is indicated by an amber LED illumination of the sleep button on the control panel.

be the result of a paper jam, communication error with the PC, or similar event. This period of time is indicated by a blinking amber attention LED illumination on the control panel.

This mode is indicated by a solid amber attention LED illumination on the control panel and starts when a maintenance event is triggered (such as the need for separation pad replacement). Maintenance events occur during predefined intervals to help ensure that the scanner or ADF mechanisms continue to perform as specified.

ENWW Modes and control-panel indicators 31

Circuit board assemblies

Table 4-3 Circuit board assemblies

Location Name Description

ADF ADF controller

board

CCD board Composed of CCD, AFE, and various discrete devices. Located on the ADF optical

Lamp inverter board

Ultrasonic sensor transmitter board

Ultrasonic sensor receiver board

Imprinter board This board consists of the power transistors that are used to control the firing of the

Flatbed scanner Scanner control

board

This board controls all of the ADF motor operation, including the background color solenoid, and sensor detection within the ADF mechanism. Additionally, it controls the firing timing of the imprinter ink cartridge. This board is composed of a Gate Array, an Analog to Digital Converter, and various motor control devices. It is located in the ADF assembly.

carriage assembly. This board is not serviceable.

Used to control the CCFL lamps and heater wires. Located on the bottom of the ADF optical carriage assemblies. This board is not serviceable.

Transmits the ultrasonic signal to the receiver on the other side of the media transportation path of the ADF assembly. Located on the bottom of the media transportation path in the ADF assembly.

Receives the ultrasonic signal from the transmitter on the other side of the media transportation path in the ADF assembly. Located on the top side of the media transportation path in the ADF assembly.

12 ink nozzles on the imprinter ink cartridge. It is located in the ADF assembly.

This is the main board in the entire system, which is composed of the main control and image pipe ASIC, the JPEG compression chip, SRAM, SDRAM, Flash RAM, DDR2 Memory, FPGA (for sensor data reordering), LVDS receivers, DC/DC converters, etc. This board controls Analog Front End (AFE) and CCD timing and receives and processes the information from both of the optical heads in the scan system, performs all requested operations from the user, and transfers the output image data through the high speed USB interface to the attached Host PC. Located in the scanner assembly.

Power supply Supplies 5V and 24V outputs for all system operation. Located in the scanner

Relay board Cabling interface board between the scanner control board and the CCD board.

CCD board Composed of CCD, AFE, and various discrete devices. Located on the optical

Lamp inverter board

Control panel board Communicates to the scanner control board through the microcontroller USB 1.1

assembly.

Located on the scanner optical assembly and the control panel circuit board. This board is not serviceable.

carriage assembly. This board is not serviceable.

Used to control the CCFL lamps and heater wires. Located on the bottom of the optical carriage assemblies. This board is not serviceable.

interface, which passes through the relay board. This board consists of a microcontroller, Flash RAM, switches, and LEDs. Located on the front of the scanner assembly.

32 Chapter 4 Theory of operation ENWW

Fans

The Scanjet N9120 system has four fans, each of which have failure detection algorithms included in the system firmware:

ADF motor fan. See

●

ADF carriage fan. See

●

Scanner carriage-motor fan. See

●

Scanner carriage fan. See

●

ADF motor fan on page 101.

ADF carriage fan on page 102.

Scanner carriage-motor fan on page 203.

Scanner carriage fan on page 206.

ENWW Fans 33

ADF feed system

Sensors

Figure 4-1 Sensors

Table 4-4 Sensors

Item Description

1 Input-tray sensor (open). See Input-tray sensor on page 129.

2 Paper-present sensor. See Paper-present sensor on page 139.

3 Elevator arm sensor. See Elevator arm sensor on page 137.

4 Pick-up roller sensor. See Pick-up roller sensor on page 135.

5 Jam door 1 sensor. See Jam door 1 sensor on page 141.

6 Registration sensor. See Registration sensor on page 140.

7 Upper multi-pick sensor PCA. See Upper multi-pick sensor PCA on page 119.

8 Lower multi-pick sensor PCA. See Lower multi-pick sensor PCA on page 121.

9 Jam door 2 sensor. See Jam door 2 sensor on page 142.

10 ADF scan position sensor. See ADF scan position sensor on page 146.

11 Background solenoid sensor. See Background solenoid sensor on page 138.

12 Flatbed scan position sensor. See Flatbed scan position sensor on page 130.

13 Exit 1 sensor. See Exit 1 sensor on page 133.

14 Jam door 3 sensor. See Jam door 3 sensor on page 143.

15 Imprinter paper-present sensor. See Imprinter paper-present sensor on page 144.

16 Exit 2 sensor. See Exit 2 sensor on page 134.

17 ADF open sensor (not serviceable).

18 Carriage home position sensor (not serviceable).

34 Chapter 4 Theory of operation ENWW

Motors

Figure 4-2 Motors

Item Description

1 Driven by ADF input-tray lift-motor assembly. See ADF input-tray lift-motor assembly on page 103.

2 Driven by ADF pick-motor assembly. See ADF pick-motor assembly on page 114.

3 Driven by ADF feed-motor assembly. See ADF feed-motor assembly on page 108.

4 ADF background-solenoid assembly. See ADF background-solenoid assembly on page 194.

5 Driven by ADF exit-motor assembly. See ADF exit-motor assembly on page 104.

ENWW ADF feed system 35

Service block diagram

Figure 4-3 Service block diagram

Flatbed Carriage Assembly

FL La

/ Heate

oard

Even

Pixe

oard

Scanner Control Board

mps (2) r Wire

FPGA

ntrol Pane

Lamp Inverter

Board

D B

Odd

Board

Pixe

y B

Rela

LVDS Receiver LVDS Receiver LVDS ReceiverLVDS Receiver

USB Host 1.1 FS I/F USB Device 2.0 HS I/F

CCFL Lamps (2)

/ Heater Wire

Odd

Pixels

ADF Carriage Assembly

Lamp Invert

Board

D Boar

Even

Pixels

Imprinter

Driver Bo

ard

nsors:

ADF Se

·Input Tray

·P

·Elevat

·Pick up Roller

·Jam D

·Registration

·Lower Mult

· Jam Door 2

·A

· Background Solenoid

· FB Scan Position

·Exit 1

·Jam D

· Imprinter Paper Present

·Exit 2

Transm

aper Present

Upper Multi-pick

DF S

Ultrasonic

itt

ard

F Cont

Ope

Arm

oor 1

i-pic

can Position

oor 3

rol Board

Ultrasonic

eceiv Board

Automatic Document

Feeder

(ADF)

lev

Input E

ator

Mot

ADF

ick/Sep

Motor

Feed Motor

ADF

Exit Motor

Background

Solenoid

ADF

Carriage Fan

ADF

Motor Fan

Scanner

Carriage Fan

Scanner

Motor F

Scanner

Moto

Scanner Sensors:

·ADF Open arri

·C

age Home Position

Flatbed

Carriage Motor

Flatbed

Scanner

Power Supp

ard

Personal

Computer

36 Chapter 4 Theory of operation ENWW

5 Removal and replacement

Removal and replacement strategy

●

User-replaceable parts

●

External covers

●

Automatic document feeder FRUs

●

Flatbed scanner FRUs

●

ENWW 37

Removal and replacement strategy

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

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

HP does not support repairing individual subassemblies or problem solving at the component level.

Note the length, diameter, color, type, and location of each screw. Be sure to return each screw to its original location during reassembly.

Incorrectly routed or loose wire harnesses can interfere with other internal components and can become damaged or broken. Frayed or pinched harness wires can be difficult to locate. When replacing wire harnesses, always use the provided wire loops, lance points, or wire-harness guides.

General cautions during removal and replacement

WARNING! Turn the product off, wait 5 seconds, and then remove the power cord before attempting

to service the product. If this warning is not followed, severe injury can result, as well as damage to the product. The power must be on for certain functional checks during problem solving. However, the power supply should be disconnected during parts removal.

The sheet-metal parts can have sharp edges. Be careful when handling sheet-metal parts.

CAUTION: Do not bend or fold the flat flexible cables (FFCs) during removal or installation. Also, do

not straighten folds in the FFCs. You must make sure that all FFCs are fully seated in their connectors. Failure to fully seat an FFC into a connector can cause a short circuit in a PCA.

Avoid pulling directly on wires to disconnect wire-harness connectors. Pull on the plastic body of a connector if possible to avoid damaging the connector wires.

NOTE: To install a self-tapping screw, first turn it counterclockwise to align it with the existing thread

pattern, and then carefully turn it clockwise to tighten. Do not overtighten. If a screw hole becomes stripped, repair the screw hole or replace the affected assembly.

Electrostatic discharge

CAUTION: Some parts are sensitive to electrostatic discharge (ESD). Look for the ESD reminder

when removing product parts. Always perform service work at an ESD-protected workstation or mat. If an ESD workstation or mat is not available, ground yourself by touching the sheet-metal chassis before touching an ESD-sensitive part.

Protect the ESD-sensitive parts by placing them in ESD pouches when they are out of the product.

38 Chapter 5 Removal and replacement ENWW

Required tools

#2 Phillips screwdriver with a magnetic tip and a 152 mm (6.0 inch) shaft length

●

Short #2 Phillips screwdriver with a magnetic tip and a 76 mm (3.0 inch) shaft length

●

Small flat-blade screwdriver

●

Needle-nose pliers

●

ESD mat (if available; see the preceding ESD caution)

●

Penlight (optional)

●

CAUTION: Always use a Phillips screwdriver (callout 1). Do not use a pozidrive screwdriver (callout 2)

or any motorized screwdriver. These can damage screws or screw threads.

Figure 5-1 Phillips and pozidrive screwdriver comparison

Cleaning supplies

The scanner glass and ADF must be cleaned with appropriate supplies.

When cleaning the scanner glass, see

When cleaning the ADF, see

Screws and fasteners

Make sure that components are replaced with the correct screw type. Using the incorrect screw (for example, substituting a long screw for the correct shorter screw) can cause damage to the product or interfere with product operation. Do not intermix screws that are removed from one component with the screws that are removed from another component.

For a complete list of screws and fasteners, see

Before performing service

1. Turn off the power by using the power switch.

2. Unplug the power cable and interface cable(s).

3. Remove all media from the product.

4. Place the product on an ESD mat (if one is available). If an ESD workstation or mat is not available,

ground yourself by touching the sheet-metal chassis before touching an ESD-sensitive part.

Clean the scanner glass on page 27.

Clean the ADF on page 24.

Field replaceable units (FRUs) on page 287.

5. Remove the imprinter cartridge. See

ENWW Removal and replacement strategy 39

Imprinter cartridge on page 42.

After performing service

1. Clean the outside of the product with a damp cloth.

2. If the ADF had an imprinter cartridge installed, reinstall it. See

3. Replace media in the ADF input tray.

4. Plug in the power cable and interface cable(s).

5. Turn on the power by using the power switch, and then verify that the expected startup sounds

occur.

6. Verify host computer and scanner connectivity.

7. Verify that the most recent firmware is installed by using the Scanner Tools Utility.

8. Verify NVRAM data and make changes as required.

9. Perform scan-quality tests:

a. Perform a scan job from the ADF, and then verify that the output meets expectations.

b. Perform a scan job from the glass, and then verify that the output meets expectations.

c. Send a scan job from the host computer, and then verify that the output meets expectations.

10. If the imprinter cartridge was reinstalled, open the HP Scanner Tools Utility, click the Imprinter tab,

and then click Test imprinter.

Imprinter cartridge on page 42.

40 Chapter 5 Removal and replacement ENWW

User-replaceable parts

Imprinter cartridge

●

Fan filters

●

ADF base reflector

●

Pickup-roller assembly

●

Separation-pad assembly

●

ENWW User-replaceable parts 41

Imprinter cartridge

1. Raise the ADF input tray until it clicks into place.

Figure 5-2 Remove the imprinter cartridge (1 of 4)

2. Lift the green lever on the imprinter carriage to disengage it from the page-size slot, and then slide

the imprinter carriage completely to the left.

Figure 5-3 Remove the imprinter cartridge (2 of 4)

42 Chapter 5 Removal and replacement ENWW

3. Raise the imprinter-cartridge latch.

Figure 5-4 Remove the imprinter cartridge (3 of 4)

4. Slide the cartridge to the right, and then remove it from the imprinter carriage.

Figure 5-5 Remove the imprinter cartridge (4 of 4)

ENWW User-replaceable parts 43

Fan filters

NOTE: Fan filters are located behind the back-filter cover (shown in this procedure) and the right-filter

cover. The back-upper cover does not contain a filter. Use this procedure to remove either of the fanfilter covers or fan filters.

1. Remove the fan-filter cover.

Figure 5-6 Remove the fan filter (1 of 2)

2. Rotate the fan-filter cover away from the product, and then remove the fan filter.

Figure 5-7 Remove the fan filter (2 of 2)

44 Chapter 5 Removal and replacement ENWW

ADF base reflector

1. Open the ADF.

Figure 5-8 Remove the ADF base reflector (1 of 2)

2. Pull the ADF base reflector from the bottom of the ADF.

Figure 5-9 Remove the ADF base reflector (2 of 2)

ENWW User-replaceable parts 45

Reinstall the ADF base reflector

Place the ADF base reflector on the scanner glass with the white adhesive squares facing up and the tab-like cutout toward the front, and then close the ADF.

Figure 5-10 Reinstall the ADF base reflector

46 Chapter 5 Removal and replacement ENWW

Pickup-roller assembly

1. Remove the pickup-roller cover. See Pickup-roller cover on page 183.

2. Pull the roller end of the shaft away from the product to disengage it (callout 1), slide the assembly

toward the front of the product to release the drive-gear end of the shaft (callout 2), and then remove the pickup-roller assembly (callout 3).

Figure 5-11 Remove the pickup-roller assembly

ENWW User-replaceable parts 47

Reinstall the pickup-roller assembly

1. When you reinstall the pickup-roller assembly, make sure that the spring is correctly positioned

between the pickup-roller assembly and the ADF jam door 1.

NOTE: Replace the pickup-roller spring if it is bent or damaged. See Pick-up roller spring

on page 175.

Figure 5-12 Reinstall the pickup-roller assembly (1 of 2)

2. Install the drive-gear end of the shaft (callout 1) into the retainer, and then slide the assembly toward

the back of the product.

a. Push the roller end of the shaft into the retainer (callout 2).

b. Rotate the assembly into place (callout 3).

Figure 5-13 Reinstall the pickup-roller assembly (2 of 2)

3. Replace the pickup-roller cover.

48 Chapter 5 Removal and replacement ENWW

Separation-pad assembly

1. Release one tab.

Figure 5-14 Remove the separation-pad assembly (1 of 3)

2. Slide the separation-pad assembly to the right (callout 1), and then rotate the separation-pad

assembly toward the front of the product to release the left-side hinge pin (callout 2).

Figure 5-15 Remove the separation-pad assembly (2 of 3)

ENWW User-replaceable parts 49

3. Remove the separation-pad assembly.

Figure 5-16 Remove the separation-pad assembly (3 of 3)

Reinstall the separation-pad assembly

When reinstalling the separation-pad assembly, make sure that the spring is correctly positioned under the assembly.

NOTE: Replace the separation-pad spring if it is bent or damaged. See Separation-pad spring

on page 176.

Figure 5-17 Reinstall the separation-pad assembly

50 Chapter 5 Removal and replacement ENWW

External covers

Scanner control-panel cover

●

Scanner back-filter cover

●

Scanner right-filter cover

●

ADF front cover

●

ADF back cover

●

Scanner back cover

●

ENWW External covers 51

Scanner control-panel cover

Release five tabs, and then rotate the front scanner control-panel cover away from the product to remove it.

Figure 5-18 Remove the scanner control-panel cover

52 Chapter 5 Removal and replacement ENWW

Scanner back-filter cover

Remove the scanner back-filter cover. See Fan filters on page 44.

Scanner right-filter cover

Remove the scanner right-filter cover. See Fan filters on page 44.

ENWW External covers 53

ADF front cover

1. Open the ADF.

2. Remove three screws (callout 1).

Figure 5-19 Remove the ADF front cover (1 of 5)

3. Remove two screws (callout 2).

Figure 5-20 Remove the ADF front cover (2 of 5)

54 Chapter 5 Removal and replacement ENWW

4. Rotate the top of the ADF front cover away from the ADF.

NOTE: Pull cover away from the ADF to create a small space between the cover and ADF.

Figure 5-21 Remove the ADF front cover (3 of 5)

5. Release three tabs (callout 3).

Figure 5-22 Remove the ADF front cover (4 of 5)

ENWW External covers 55

6. Remove the ADF front cover.

Figure 5-23 Remove the ADF front cover (5 of 5)

56 Chapter 5 Removal and replacement ENWW

ADF back cover

1. Open the ADF jam door 1.

2. Remove two screws (callout 1).

Figure 5-24 Remove the ADF back cover (1 of 3)

3. Remove two screws and two tabs (callout 2).

Figure 5-25 Remove the ADF back cover (2 of 3)

ENWW External covers 57

4. Rotate the top of the cover away from the product to release it, and then remove the cover.

Figure 5-26 Remove the ADF back cover (3 of 3)

58 Chapter 5 Removal and replacement ENWW

Scanner back cover

1. Remove two screws (callout 1).

Figure 5-27 Remove the scanner back cover (1 of 2)

2. Firmly pull the cover away from the product to remove it.

Figure 5-28 Remove the scanner back cover (2 of 2)

ENWW External covers 59

Automatic document feeder FRUs

Automatic document feeder (ADF)

●

ADF motor fan

●

ADF carriage fan

●

ADF input-tray lift-motor assembly

●

ADF exit-motor assembly

●

ADF feed-motor assembly

●

ADF pick-motor assembly

●

Upper multi-pick sensor PCA

●

Lower multi-pick sensor PCA

●

ADF controller PCA

●

Imprinter PCA

●

Input-tray sensor

●

Flatbed scan position sensor

●

Exit 1 sensor

●

Exit 2 sensor

●

Pick-up roller sensor

●

Elevator arm sensor

●

Background solenoid sensor

●

Paper-present sensor

●

Registration sensor

●

Jam door 1 sensor

●

Jam door 2 sensor

●

Jam door 3 sensor

●

Imprinter paper-present sensor

●

ADF scan position sensor

●

ADF bottom corner outer paper path guide

●

ADF bottom corner inner paper path guide

●

ADF cal-strip assembly

●

ADF exit inner paper path guide

●

ADF top corner inner paper path guide

●

60 Chapter 5 Removal and replacement ENWW

Lower multi-pick sensor cover

●

Flatbed scan position sensor arm

●

Exit 1 sensor arm

●

Exit 2 sensor arm

●

Paper-present-sensor arm

●

Input-tray-elevator arm

●

Registration sensor arm

●

Scan position sensor arm

●

Pick-up roller spring

●

Separation-pad spring

●

ADF input-tray assembly

●

ADF output tray

●

Pickup-roller cover

●

ADF hinge limiters

●

ADF jam door 3

●

Paper present sensor and imprinter PCA holder

●

ADF shingle wall

●

A4 paper-stop

●

ADF background-solenoid assembly

●

Imprinter carriage and FFC

●

ENWW Automatic document feeder FRUs 61

Automatic document feeder (ADF)

NOTE: Factory NVRAM data should be downloaded before the service call.

1. Remove the following components:

ADF back cover. See

●

Scanner back cover. See

●

ADF hinge limiters. See

●

2. Remove two connectors (callout 1).

Figure 5-29 Remove the ADF (1 of 8)

ADF back cover on page 57.

Scanner back cover on page 59.

ADF hinge limiters on page 185.

3. Remove two FFC connectors, and then feed two FFCs through the wire guide.

Figure 5-30 Remove the ADF (2 of 8)

62 Chapter 5 Removal and replacement ENWW

4. Remove one screw (callout 2).

TIP: Place the loose ends of the two FFC connectors into the sleeve on the ADF to prevent them

from being damaged when the ADF is removed.

Figure 5-31 Remove the ADF (3 of 8)

5. Remove the wire guide, and then place the two connectors under the power-feed cable in the

scanner chassis (callout 3).

Figure 5-32 Remove the ADF (4 of 8)

ENWW Automatic document feeder FRUs 63

6. Open the ADF, and then remove two screws (callout 4).

WARNING! The ADF is not restrained when opened and the hinge limiters are removed. The

product can tip over if the ADF is opened too far.

Figure 5-33 Remove the ADF (5 of 8)

7. Close the ADF, and then remove two screws (callout 5).

Figure 5-34 Remove the ADF (6 of 8)

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8. Remove two screws (callout 6).

Figure 5-35 Remove the ADF (7 of 8)

9. Slide the ADF toward the rear of the product to disengage the locator pins (callout 7), and then lift

up on the ADF to remove it.

Figure 5-36 Remove the ADF (8 of 8)

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Reinstall the ADF

NOTE: Factory NVRAM data should be downloaded before the service call.

1. Place the ADF on the flatbed scanner, and then slide the ADF toward the front of the product to

engage the locator pins (callout 1).

Figure 5-37 Reinstall the ADF (1 of 7)

2. Close the ADF, and then install, but do not tighten, two screws (callout 2).

Figure 5-38 Reinstall the ADF (2 of 7)

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3. Install, but do not tighten, two screws (callout 3).

Figure 5-39 Reinstall the ADF (3 of 7)

4. Remove two screws (callout 4).

Figure 5-40 Reinstall the ADF (4 of 7)

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5. Install and hand tighten two alignment pins (callout 5).

Figure 5-41 Reinstall the ADF (5 of 7)

6. Carefully close the ADF and adjust it as necessary so that the alignment pins fit into the holes in

the ADF chassis.

CAUTION: Make sure that the ADF closes completely and is in full contact with the flatbed

scanner.

Figure 5-42 Reinstall the ADF (6 of 7)

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7. Carefully open the ADF, and then Install, but do not fully tighten, two screws (callout 6).

WARNING! The ADF is not restrained when opened and the hinge limiters are removed. The

product can tip over if the ADF is opened too far.

Figure 5-43 Reinstall the ADF (7 of 7)

8. Close the ADF and verify that it is correctly positioned on the alignment pins and the flatbed

scanner. Adjust if necessary. See

9. With the ADF in the closed position, fully tighten the four screws at the back of the product. See

Figure 5-38 Reinstall the ADF (2 of 7) on page 66 and Figure 5-39 Reinstall the ADF (3 of 7) on page 67.

10. Open the ADF, and then fully tighten the remaining two screws. See

(7 of 7) on page 69.

WARNING! The ADF is not restrained when opened and the hinge limiters are removed. The

product can tip over if the ADF is opened too far.

11. Reinstall the wire guide, reconnect the FFCs and wire-harness connectors, and then reinstall the

hinge limiters.

12. Replace the scanner back cover. See

13. Adjust the height of the ADF. See

14. Adjust the NVRAM data. See

15. Align the ADF. See

16. Create the factory calibration data for ADF-A. See

on page 99.

Align the ADF on page 96.

Figure 5-42 Reinstall the ADF (6 of 7) on page 68.

Figure 5-43 Reinstall the ADF

Scanner back cover on page 59.

ADF height adjustment on page 70.

NVRAM data management on page 73.

Create the factory calibration data for ADF-A

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ADF height adjustment

NOTE: Factory NVRAM data should be downloaded before the service call.

1. Remove the ADF back cover. See ADF back cover on page 57.

2. Fold the paper template (use 20# paper).

Figure 5-44 ADF height adjustment (1 of 6)

3. Open the ADF, place the folded shim between the ADF and flatbed scanner, with the back edge

of the shim aligned with the back edge of jam door 2, and then close the ADF.

Figure 5-45 ADF height adjustment (2 of 6)

4. Slide the shim approximately 3.0 mm in and out of the product.

NOTE: The ADF should create a slight amount of resistance on the shim as it moves between

the ADF and flatbed scanner.

Figure 5-46 ADF height adjustment (3 of 6)

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5. Open the ADF, place the folded shim between the ADF and flatbed scanner with the left edge of

the shim aligned with the front edge of jam door 2, and then close the ADF.

Figure 5-47 ADF height adjustment (4 of 6)

6. Slide the shim approximately 3.0 mm in and out of the product.

NOTE: The ADF should create a slight amount of resistance on the shim as it moves between

the ADF and flatbed scanner.

Figure 5-48 ADF height adjustment (5 of 6)

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7. Turn the ADF height adjustment screw counterclockwise (callout 1) to adjust the height of the back

edge or clockwise (callout 2) to adjust the height of the front edge of the ADF.

NOTE: Do not adjust the screw on the right-side hinge.

Figure 5-49 ADF height adjustment (6 of 6)

1 2

8. Replace the ADF back cover. See ADF back cover on page 57.

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NVRAM data management

After replacing the ADF, ADF controller PCA, flatbed, or scanner controller PCA in the field, NVRAM data between the scanner controller PCA and the ADF controller PCA must be manipulated. The N9120 Service Tool provides tools to manage NVRAM Data, adjust the ADF alignment, and calibrate the calibration strip of a replacement ADF to an existing scanner controller PCA.

NOTE: Factory NVRAM data should be downloaded before the service call.

Repair menu

The following shows the selections available from the Repair menu:

Figure 5-50 Repair menu (1 of 11)

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Repair menu options

The following provides descriptions and options available from the Repair menu:

Figure 5-51 Repair menu (2 of 11)

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Replacement scenarios

The following seven scenarios provide data selection recommendations for ADF, flatbed scanner, whole-unit, and controller PCA replacement scenarios:

Scenario #1: Whole ADF replacement

Scenario #1 applies when replacing the whole ADF and NVRAM data is accessible.

Figure 5-52 Replacement scenario #1 (3 of 11)

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Scenario #2: ADF controller PCA replacement

Scenario #2 applies when replacing the ADF controller PCA and NVRAM data is accessible.

Figure 5-53 Replacement scenario #2 (4 of 11)

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Scenario #3: ADF controller PCA replacement

Scenario #3 applies when replacing the ADF controller PCA and NVRAM data is not accessible.

Figure 5-54 Replacement scenario #3 (5 of 11)

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Scenario #4: Whole flatbed scanner replacement

Scenario #4 applies when replacing the whole flatbed scanner and NVRAM data is accessible.

Figure 5-55 Replacement scenario #4 (6 of 7)

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HP Scanjet N9120 service manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Product basics

Quick access to product information

Product basics

Product features

Product walkaround

Front and right-side view

Back view

Side view (left)

Model and serial numbers

Control-panel walkaround

Supported product software

Supported operating systems

Supported scanner drivers

Supported scanner-management software

System requirements

Paper handling

ADF specifications

Media specifications

Media to avoid

2 Installation and configuration

Prepare the site

Unpack the device

Install the software

3 Manage and maintain

Manage supplies

HP Scanner Tools Utility scanner maintenance information

Parts life expectancy

Clean the product

Clean the exterior

Clean the ADF

Clean the scanner glass

Clean the fan filters

4 Theory of operation

Basic operation

Modes and control-panel indicators

Circuit board assemblies

Fans

ADF feed system

Sensors

Motors

Service block diagram

5 Removal and replacement

Removal and replacement strategy

General cautions during removal and replacement

Electrostatic discharge

Required tools

Cleaning supplies

Screws and fasteners

Before performing service

After performing service

User-replaceable parts

Imprinter cartridge

Fan filters

ADF base reflector

Reinstall the ADF base reflector

Pickup-roller assembly

Reinstall the pickup-roller assembly

Separation-pad assembly

Reinstall the separation-pad assembly

External covers

Scanner control-panel cover

Scanner back-filter cover

Scanner right-filter cover

ADF front cover

ADF back cover

Scanner back cover

Automatic document feeder FRUs

Automatic document feeder (ADF)

Reinstall the ADF

ADF height adjustment

NVRAM data management

Repair menu

Repair menu options

Replacement scenarios

Scenario #1: Whole ADF replacement

Scenario #2: ADF controller PCA replacement