Hp M630Z, M630H, M630F, M630DN User Manual

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LaserJet Enterprise MFP M630

Troubleshooting Manual

M630h

M630zM630fM630dn

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For product repair and part number information, see the Repair Manual.

HP LaserJet Enterprise M630

Troubleshooting Manual

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.

Edition 1, 9/2014

Conventions used in this guide

TIP: Helpful hints or shortcuts.

Reinstallation tip: Reinstallation helpful hints, shortcuts, or considerations.

NOTE: Information that explains a concept or how to complete a task.

IMPORTANT: Information that help the user to avoid potential product error conditions.

CAUTION: Procedures that the user must follow to avoid losing data or damaging the product.

WARNING! Procedures that the user must follow to avoid personal injury, catastrophic loss of data, or

extensive damage to the product.

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iv Conventions used in this guide ENWW

Table of contents

1 Theory of operation ....................................................................................................................................... 1

Basic operation ...................................................................................................................................................... 2

Sequence of operation (product) ........................................................................................................ 4

Sequence of operation (scanner) ........................................................................................................ 5

Formatter-control system ..................................................................................................................................... 6

Formatter hardware ............................................................................................................................ 6

Sleep mode ....................................................................................................................... 6

Input/output (I/O) ............................................................................................................. 8

CPU .................................................................................................................................... 8

Memory ............................................................................................................................. 8

Random access memory (RAM) ...................................................................... 8

Firmware ........................................................................................................................... 8

Nonvolatile random access memory (NVRAM) ................................................................. 8

Image Resolution Enhancement technology ................................................................... 8

HP Memory Enhancement technology ............................................................................. 9

Printer job language (PJL) ................................................................................................. 9

Printer management language (PML) .............................................................................. 9

Control panel ....................................................................................................................................... 9

Scanner interface ................................................................................................................................ 9

Engine-control system ........................................................................................................................................ 10

DC controller ...................................................................................................................................... 11

Motors ............................................................................................................................. 12

Fans ................................................................................................................................. 13

High-voltage power supply ............................................................................................ 14

Low-voltage power supply ............................................................................................. 15

Overcurrent/overvoltage protection ........................................................... 16

Voltage detection ......................................................................................... 16

Safety ............................................................................................................ 16

Sleep (power save) mode ............................................................................. 17

Low-voltage power supply functions .......................................................... 17

Fuser control ................................................................................................................... 18

Fuser temperature control ........................................................................... 19

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Fuser sleeve temperature protection .......................................................... 20

Fuser failure detection ................................................................................. 20

Pressure roller cleaning ............................................................................... 21

Ambient-temperature detection ................................................................. 21

Laser/scanner system ......................................................................................................................................... 22

Laser/scanner failure ........................................................................................................................ 23

Safety ................................................................................................................................................ 23

Image-formation system .................................................................................................................................... 24

Electrophotographic process ............................................................................................................ 26

Step 1: Primary charge (conditioning) ............................................................................ 27

Step 2: Laser-beam exposure (writing) .......................................................................... 27

Step 3: Developing .......................................................................................................... 28

Step 4: Transfer .............................................................................................................. 28

Step 5: Separation .......................................................................................................... 29

Step 6: Fusing .................................................................................................................. 29

Step 7: Drum cleaning ..................................................................................................... 30

Toner cartridge .................................................................................................................................. 31

Memory chip .................................................................................................................... 31

Cartridge presence and life detection ............................................................................ 31

Pickup, feed, and delivery system ...................................................................................................................... 33

Pickup-and-feed block ...................................................................................................................... 38

Tray 2 pickup ................................................................................................................... 39

Tray 2 paper-size detection and tray-present detection ............................ 40

Tray 1 pickup ................................................................................................................... 43

Tray 1 paper-presence detection ................................................................. 44

Feed speed control ......................................................................................................... 44

Skew-feed prevention .................................................................................................... 45

Paper-length detection .................................................................................................. 46

Paper-width detection .................................................................................................... 46

Fusing, reverse, and delivery block .................................................................................................. 47

Fusing .............................................................................................................................. 47

Pressure roller pressurization and depressurization control ....................................... 48

Reverse and delivery control .......................................................................................... 49

Face-down delivery ...................................................................................... 50

Face-up delivery ........................................................................................... 51

Output bin paper-full detection ................................................................... 52

Duplex block ...................................................................................................................................... 53

Duplex side registration adjustment operation ............................................................. 53

Jam detection .................................................................................................................................... 55

Optional paper feeders ........................................................................................................................................ 59

Paper-feeder pickup and feed components ..................................................................................... 62

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1x500-sheet paper feeder signal flow and component locations ................................ 62

1x500-sheet paper feeder with cabinet signal flow and component locations ........... 63

2,500-sheet high-capacity paper feeder signal flow and component locations .......... 65

Paper-size detection and tray-presence detection ......................................................................... 67

Paper feeder tray lift operation ........................................................................................................ 68

Trays 3 and 4 lift operation ............................................................................................ 68

Tray 5 lift operation ........................................................................................................ 69

Paper feeder jam detection .............................................................................................................. 70

Scanning/image capture system ........................................................................................................................ 73

Scanner .............................................................................................................................................. 73

Document feed system ..................................................................................................................... 73

Sensors in the document feeder .................................................................................... 73

Document feeder paper path ......................................................................................... 75

Document feeder simplex operation ............................................................................. 75

Document feeder e-duplex operation ............................................................................ 76

Front-side and back-side background selector ............................................................. 77

Deskew operation ........................................................................................................... 78

Document feeder hinges ................................................................................................ 79

Stapling mailbox .................................................................................................................................................. 81

Motor control ..................................................................................................................................... 83

Failure detection ............................................................................................................. 84

Delivery operation .......................................................................................................... 84

Staple operation ........................................................................................... 86

Stapler .......................................................................................................... 91

Output bin 3 lift operation ........................................................................... 92

Stacker mode .................................................................................................................................... 93

Mailbox/job separator mode ............................................................................................................ 93

Jam detection .................................................................................................................................... 94

Automatic delivery ............................................................................................................................ 96

2 Solve problems ........................................................................................................................................... 97

Solve problems checklist ..................................................................................................................................... 98

Menu map .......................................................................................................................................................... 101

Current settings pages ...................................................................................................................................... 101

Event log ............................................................................................................................................................ 101

Pre-boot menu options ..................................................................................................................................... 103

Remote Admin ................................................................................................................................. 110

Required software and network connection ................................................................ 110

Telnet client ................................................................................................ 111

Network connection ................................................................................... 112

Connect a remote connection ...................................................................................... 112

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Disconnect a remote connection .................................................................................. 117

Troubleshooting process .................................................................................................................................. 119

Determine the problem source ....................................................................................................... 119

Troubleshooting flowchart .......................................................................................... 119

Power subsystem ............................................................................................................................ 120

Power-on checks .......................................................................................................... 120

Power-on troubleshooting overview ......................................................... 120

Scanning subsystem ....................................................................................................................... 124

Control panel checks ....................................................................................................................... 124

Control panel diagnostic flowcharts ............................................................................ 127

Touchscreen black, white, or dim (no image) ............................................ 128

Touchscreen is slow to respond or requires multiple presses to

respond ....................................................................................................... 129

Touchscreen has an unresponsive zone .................................................... 130

No control panel sound .............................................................................. 131

Home button is unresponsive .................................................................... 132

Hardware integration pocket (HIP) is not functioning (control panel

functional) .................................................................................................. 133

Tools for troubleshooting ................................................................................................................................. 134

Individual component diagnostics .................................................................................................. 134

LED diagnostics ............................................................................................................. 134

Understand lights on the formatter .......................................................... 134

Engine diagnostics ........................................................................................................ 139

Defeating interlocks ................................................................................... 139

Disable cartridge check .............................................................................. 140

Engine test button ...................................................................................... 140

Paper path test ............................................................................................................. 141

Paper path sensors test ............................................................................................... 141

Manual sensor tests and tray/bin sensor tests ........................................................... 143

Manual sensor tests ................................................................................... 143

Tray/bin manual sensor test ...................................................................... 148

Print/stop test .............................................................................................................. 150

Component tests .......................................................................................................... 150

Component test (special-mode test) ......................................................... 150

Scanner tests ................................................................................................................ 153

Scanner tests .............................................................................................. 153

Diagrams ......................................................................................................................................... 155

Block diagrams ............................................................................................................. 155

Sensors ....................................................................................................... 155

Switches (product base) ............................................................................. 159

Solenoids (product base) ........................................................................... 160

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Clutch (product base) ................................................................................. 161

Motors ......................................................................................................... 162

Fans (product base) .................................................................................... 166

Main assemblies ......................................................................................... 167

Main PCAs (product base) ........................................................................... 174

Rollers (product base) ................................................................................ 175

DC controller connections ............................................................................................ 176

Scanner controller board (SBC) connectors ................................................................. 178

1x500-sheet feeder, 1x500-sheet feeder with cabinet, and 2,500-sheet high-

capacity feeder connectors .......................................................................................... 179

Stapling mailbox connectors ........................................................................................ 180

General timing chart ..................................................................................................... 182

General circuit diagrams ............................................................................................... 184

Internal print-quality test pages .................................................................................................... 189

Print quality troubleshooting pages ............................................................................ 189

Fuser test page ............................................................................................................. 192

Cleaning page ............................................................................................................... 193

Enable and configure auto cleaning .......................................................... 193

Print configuration page ............................................................................................... 194

Configuration page ..................................................................................... 194

HP embedded Jetdirect page ..................................................................... 196

Finding important information on the configuration pages ..................... 197

Print quality troubleshooting tools ................................................................................................ 198

Print quality troubleshooting tools: repetitive defects ruler ...................................... 198

Control-panel menus ...................................................................................................................... 199

Administration menu .................................................................................................... 199

Reports menu ............................................................................................. 199

General Settings menu ............................................................................... 201

Copy Settings menu ................................................................................... 206

Scan/Digital Send Settings menu .............................................................. 214

Fax Settings menu (fax models only) ........................................................ 224

General Print Settings menu ...................................................................... 234

Default Print Options menu ....................................................................... 237

Display Settings menu ............................................................................... 239

Manage Supplies menu .............................................................................. 241

Manage Trays menu ................................................................................... 244

Network Settings menu ............................................................................. 246

Troubleshooting menu ............................................................................... 257

Device Maintenance menu ............................................................................................ 259

Backup/Restore menu ............................................................................... 259

Calibration/Cleaning menu ........................................................................ 260

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USB Firmware Upgrade menu .................................................................... 262

Service menu .............................................................................................. 262

Control panel message document (CPMD) ..................................................................................... 263

Control-panel message types ...................................................................................... 263

Control-panel messages and event log entries ........................................................... 263

10.XX.YZ Error Messages ........................................................................... 263

11.XX.YZ Error Messages ........................................................................... 266

13.XX.YZ Error Messages ........................................................................... 267

13.XX.YZ Error Messages ........................................................................... 293

30.XX.YZ Error Messages ........................................................................... 293

31.XX.YZ Error Messages ........................................................................... 300

32.XX.YX and 33.XX.YZ Error Messages .................................................... 306

40.XX.YZ Error Messages ........................................................................... 312

41.XX.YZ Error Messages ........................................................................... 314

42.XX.YZ Error Messages ........................................................................... 321

44.XX.XX Error Messages ........................................................................... 321

47.XX.XX Error Messages ........................................................................... 323

48.XX.YY Error Messages ........................................................................... 325

49.XX.YY Error Messages ........................................................................... 326

50.WX.YZ Error Messages .......................................................................... 326

51.XX.YZ, 52.XX.YZ Error Messages .......................................................... 328

54.XX.YZ Error Messages ........................................................................... 329

55.XX.YZ, 56.XX.YZ Error Messages .......................................................... 330

57.XX.YZ Error Messages ........................................................................... 331

58.XX.YZ Error Messages ........................................................................... 333

59.XX.YZ Error Messages ........................................................................... 335

60.00.0Y, 62.00.00 Error Messages .......................................................... 337

65.X0.AZ Error Messages ........................................................................... 339

66.WX.YZ Error Messages .......................................................................... 339

70.XX.YY Error Messages ........................................................................... 343

80.XX.YY, 82.XX.YY Error Messages .......................................................... 343

98.0X.0Y Error Messages ........................................................................... 344

99.XX.YY Error Messages ........................................................................... 345

Alpha Error Messages ................................................................................. 352

Control panel: event log messages ................................................................................................ 386

Print or view an event log ............................................................................................. 387

Clear the event log ........................................................................................................ 387

Clear jams .......................................................................................................................................................... 388

Jam sensor locations ...................................................................................................................... 388

Paper path sensor locations ......................................................................................... 388

Jam locations .................................................................................................................................. 392

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Auto-navigation for clearing jams .................................................................................................. 392

Experiencing frequent or recurring paper jams? ............................................................................ 392

Clear jams in the document feeder ................................................................................................. 394

Clear jams in Tray 1 ......................................................................................................................... 398

Clear jams in Tray 2, 3, or 4 ............................................................................................................. 401

Clear jams in the 1,500-sheet high-capacity input tray (Tray 5) ................................................... 403

Clear jams in the right door ............................................................................................................. 406

Clear jams in the lower-right door .................................................................................................. 407

Clear jams in the duplexer and fuser .............................................................................................. 408

Clear jams under the top cover and in the registration area ......................................................... 413

Clear jams in the output bin ............................................................................................................ 416

Clear jams in the stapling mailbox accessory ................................................................................ 417

Clear staple jams in the stapling mailbox accessory ..................................................................... 419

Change jam recovery ....................................................................................................................... 423

Paper feeds incorrectly or becomes jammed ................................................................................................... 424

The product does not pick up paper ............................................................................................... 424

The product picks up multiple sheets of paper .............................................................................. 424

The document feeder jams, skews, or picks up multiple sheets of paper .................................... 425

Prevent paper jams ......................................................................................................................... 425

Use manual print modes ................................................................................................................................... 426

Solve image quality problems .......................................................................................................................... 429

Image defects table ........................................................................................................................ 429

Clean the product .............................................................................................................................................. 439

Print a cleaning page ...................................................................................................................... 439

Check the scanner glass for dirt or smudges ................................................................................. 440

Clean the pickup rollers and separation pad in the document feeder ........................................... 442

Clean the pickup, feed, and separation rollers in the 1x500-sheet paper-feeder and 1x500-

sheet paper-feeder with storage cabinet ...................................................................................... 444

Clean the pickup, feed, and separation rollers in the 2,500-sheet high-capacity feeder (HCI) .... 445

Solve performance problems ............................................................................................................................ 446

Solve connectivity problems ............................................................................................................................. 447

Solve USB connection problems ..................................................................................................... 447

Solve wired network problems ....................................................................................................... 447

Poor physical connection ............................................................................................. 447

The computer is using the incorrect IP address for the product ................................. 447

The computer is unable to communicate with the product ........................................ 448

The product is using incorrect link and duplex settings for the network ................... 448

New software programs might be causing compatibility problems ........................... 448

The computer or workstation might be set up incorrectly .......................................... 448

The product is disabled, or other network settings are incorrect ............................... 448

Service mode functions ..................................................................................................................................... 449

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Service menu ................................................................................................................................... 449

Product resets ................................................................................................................................. 452

Restore factory-set defaults ........................................................................................ 452

Restore the service ID ................................................................................................... 453

Product cold reset ........................................................................................................ 453

Format Disk and Partial Clean functions ........................................................................................ 454

Active and repository firmware locations .................................................................... 454

Partial Clean .................................................................................................................. 454

Execute a Partial Clean ............................................................................... 455

Format Disk ................................................................................................................... 455

Execute a Format Disk ................................................................................ 456

Solve fax problems ............................................................................................................................................ 457

Checklist for solving fax problems ................................................................................................. 457

What type of phone line are you using? ....................................................................... 457

Are you using a surge-protection device? .................................................................... 457

Are you using a phone company voice-messaging service or an answering

machine? ....................................................................................................................... 457

Does your phone line have a call-waiting feature? ..................................................... 457

Check fax accessory status .......................................................................................... 458

General fax problems ...................................................................................................................... 459

The fax failed to send ................................................................................................... 459

An Out of Memory status message displays on the product control panel ................ 459

Print quality of a photo is poor or prints as a gray box ............................................... 459

You touched the Stop button to cancel a fax, but the fax was still sent ..................... 459

No fax address book button displays ........................................................................... 459

Not able to locate the Fax settings in HP Web Jetadmin ............................................. 459

The header is appended to the top of the page when the overlay option is enabled 459

A mix of names and numbers is in the recipients box ................................................. 459

A one-page fax prints as two pages ............................................................................. 460

A document stops in the document feeder in the middle of faxing ............................ 460

The volume for sounds coming from the fax accessory is too high or too low .......... 460

Use Fax over VoIP networks ........................................................................................................... 460

Problems with receiving faxes ........................................................................................................ 461

Problems with sending faxes ......................................................................................................... 463

Fax error messages on the product control panel ......................................................................... 464

Send-fax messages ...................................................................................................... 465

Receive-fax messages .................................................................................................. 466

Service settings ............................................................................................................................... 467

Settings in the Troubleshooting menu ........................................................................ 467

Firmware upgrades ........................................................................................................................................... 468

Determine the installed revision of firmware ................................................................................ 469

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Perform a firmware upgrade .......................................................................................................... 470

HP Embedded Web Server ............................................................................................ 470

USB flash drive (Pre-boot menu) ................................................................................. 470

USB flash drive (control-panel menu) .......................................................................... 471

Appendix A Product specifications ................................................................................................................. 473

Product dimensions ........................................................................................................................................... 474

Product space requirements ............................................................................................................................. 475

Power consumption, electrical specifications, and acoustic emissions .......................................................... 476

Environmental specifications ............................................................................................................................ 476

Certificate of Volatility ...................................................................................................................................... 477

Index ........................................................................................................................................................... 479

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xiv ENWW

List of tables

Table 1-1 Sequence of operation (product) ......................................................................................................................... 4

Table 1-2 Sequence of operation (scanner) ......................................................................................................................... 5

Table 1-3 Formatter hardware components ....................................................................................................................... 6

Table 1-4 Motors ................................................................................................................................................................ 12

Table 1-5 Fans .................................................................................................................................................................... 13

Table 1-6 Converted DC voltages ....................................................................................................................................... 16

Table 1-7 Low-voltage power supply functions ................................................................................................................ 17

Table 1-8 Fuser components ............................................................................................................................................. 18

Table 1-9 Sensors ............................................................................................................................................................... 34

Table 1-10 Motors, clutch, and solenoids .......................................................................................................................... 35

Table 1-11 Switches ........................................................................................................................................................... 36

Table 1-12 Tray 2 media-size detection switch components ........................................................................................... 40

Table 1-13 Feed speed control ........................................................................................................................................... 44

Table 1-14 Paper-width detection ..................................................................................................................................... 46

Table 1-15 Jams that the product detects ......................................................................................................................... 56

Table 1-16 Pickup and feed components (1x500-sheet paper feeder) ............................................................................ 62

Table 1-17 Pickup and feed components (1x500-sheet paper feeder with cabinet) ....................................................... 64

Table 1-18 Pickup and feed components (2,500-sheet high-capacity paper feeder) ...................................................... 66

Table 1-19 Paper-size detection and tray-presence detection (1 x 500-sheet paper feeder and 1x500-sheet

paper feeder with cabinet) ..................................................................................................................................................... 67

Table 1-20 Paper-size detection and tray-presence detection (2,500-sheet high-capacity paper feeder) ................... 67

Table 1-21 Document feeder sensors ................................................................................................................................ 74

Table 1-22 Document feeder paper path ........................................................................................................................... 75

Table 1-23 Document feeder deskew features ................................................................................................................. 78

Table 1-24 Motor control (stapling mailbox) ..................................................................................................................... 83

Table 1-25 Delivery components (stapling mailbox) ........................................................................................................ 85

Table 2-1 Pre-boot menu options (1 of 7) ....................................................................................................................... 103

Table 2-2 Pre-boot menu options (2 of 7) ....................................................................................................................... 104

Table 2-3 Pre-boot menu options (3 of 7) ....................................................................................................................... 105

Table 2-4 Pre-boot menu options (4 of 7) ....................................................................................................................... 106

Table 2-5 Pre-boot menu options (5 of 7) ....................................................................................................................... 107

Table 2-6 Pre-boot menu options (6 of 7) ....................................................................................................................... 108

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Table 2-7 Pre-boot menu options (7 of 7) ....................................................................................................................... 109

Table 2-8 Troubleshooting flowchart .............................................................................................................................. 119

Table 2-9 Control panel diagnostic functions .................................................................................................................. 124

Table 2-10 Connectivity LED, product initialization ........................................................................................................ 135

Table 2-11 Connectivity LED, product operational .......................................................................................................... 137

Table 2-12 Paper-path sensors diagnostic tests ............................................................................................................ 141

Table 2-13 Manual sensor diagnostic tests ..................................................................................................................... 144

Table 2-14 Tray/bin manual sensors ............................................................................................................................... 148

Table 2-15 Component test details ................................................................................................................................. 151

Table 2-16 Sensors (product base) .................................................................................................................................. 155

Table 2-17 Sensors (1x500-sheet paper feeder and 1x500-sheet paper feeder with cabinet) .................................... 156

Table 2-18 Sensors (2,500-sheet high-capacity feeder) (HCI) ........................................................................................ 157

Table 2-19 Sensors (SSMBM) ........................................................................................................................................... 158

Table 2-20 Switches (product base) ................................................................................................................................ 159

Table 2-21 Solenoids (product base) ............................................................................................................................... 160

Table 2-22 Clutch (product base) ..................................................................................................................................... 161

Table 2-23 Motors (product base) ................................................................................................................................... 162

Table 2-24 Motors (1 x 500-sheet paper feeder) ............................................................................................................ 163

Table 2-25 Motors (1x500-sheet and 3 x 500-sheet paper deck) .................................................................................. 163

Table 2-26 Motors (1x500-sheet and 3 x 500-sheet paper deck) .................................................................................. 164

Table 2-27 Motors (SSMBM) ............................................................................................................................................. 165

Table 2-28 Fans (product base) ....................................................................................................................................... 166

Table 2-29 Main assemblies (product base; 1 of 2) ......................................................................................................... 167

Table 2-30 Main assemblies (product base; 2 of 2) ......................................................................................................... 168

Table 2-31 Main assemblies (1 x 500-sheet paper feeder) ............................................................................................. 169

Table 2-32 Main assemblies (1x500-sheet paper feeder with cabinet) ......................................................................... 170

Table 2-33 Main assemblies (2,500-sheet high-capacity feeder) (HCI) .......................................................................... 171

Table 2-34 Main assemblies (SSMBM; 1 of 2) .................................................................................................................. 172

Table 2-35 Main assemblies (SSMBM; 2 of 2) .................................................................................................................. 173

Table 2-36 Main PCAs (product base) .............................................................................................................................. 174

Table 2-37 Rollers (product base) ................................................................................................................................... 175

Table 2-38 DC controller connectors ............................................................................................................................... 176

Table 2-39 Scanner controller board (SCB) connectors .................................................................................................. 178

Table 2-40 1x500-sheet feeder, 1x500-sheet feeder with cabinet, and 2,500-sheet high-capacity feeder

connectors ........................................................................................................................................................................... 179

Table 2-41 Stapling mailbox connectors ......................................................................................................................... 180

Table 2-42 Important information on the configuration pages ...................................................................................... 197

Table 2-43 Reports menu ................................................................................................................................................. 199

Table 2-44 General Settings menu .................................................................................................................................. 201

Table 2-45 Copy Settings menu ....................................................................................................................................... 206

Table 2-46 Scan/Dig

ital Send Settings menu .................................................................................................................. 214

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Table 2-47 Fax Settings menu (fax models only) ............................................................................................................ 224

Table 2-48 General Print Settings menu ......................................................................................................................... 234

Table 2-49 Default Print Options menu ........................................................................................................................... 237

Table 2-50 Display Settings menu ................................................................................................................................... 239

Table 2-51 Manage Supplies menu .................................................................................................................................. 241

Table 2-52 Manage Trays menu ....................................................................................................................................... 244

Table 2-53 Network Settings menu ................................................................................................................................. 246

Table 2-54 Embedded Jetdirect Menu ............................................................................................................................. 246

Table 2-55 Troubleshooting menu .................................................................................................................................. 257

Table 2-56 Backup/Restore menu ................................................................................................................................... 260

Table 2-57 Calibration/Cleaning menu ............................................................................................................................ 260

Table 2-58 Sample event log page .................................................................................................................................. 386

Table 2-59 Sensors (product base) .................................................................................................................................. 388

Table 2-60 1x500-sheet paper-feeder and 1x500-sheet paper-feeder with storage cabinet sensors and switches

.............................................................................................................................................................................. 389

Table 2-61 2,500-sheet high-capacity feeder (HCI) sensors and switches .................................................................... 390

Table 2-62 3-bin stapling mailbox accessory sensors .................................................................................................... 391

Table 2-63 Print modes

under the Adjust Paper Types submenu ................................................................................. 427

Table 2-64 Print modes under the Optimize submenu ................................................................................................... 427

Table 2-65 Image defects table ....................................................................................................................................... 429

Table 2-66 Solve performance problems ........................................................................................................................ 446

Table 2-67 Send-fax messages ....................................................................................................................................... 465

Table 2-68 Receive-fax messages ................................................................................................................................... 466

Table A-1 Physical specifications ..................................................................................................................................... 474

Table A-2 Accessory dimensions ...................................................................................................................................... 474

Table A-3 Product space requirements ........................................................................................................................... 475

Table A-4 Operating-environment specifications ........................................................................................................... 476

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xviii ENWW

List of figures

Figure 1-1 Relationship between the main product systems .............................................................................................. 2

Figure 1-2 System block diagram ........................................................................................................................................ 3

Figure 1-3 Engine control system block diagram .............................................................................................................. 10

Figure 1-4 DC controller block diagram ............................................................................................................................. 11

Figure 1-5 Motors ............................................................................................................................................................... 12

Figure 1-6 Fans ................................................................................................................................................................... 13

Figure 1-7 High-voltage power supply .............................................................................................................................. 14

Figure 1-8 Low-voltage power supply circuit .................................................................................................................... 15

Figure 1-9 Fuser components ............................................................................................................................................ 18

Figure 1-10 Fuser circuit ..................................................................................................................................................... 19

Figure 1-11 Laser/scanner ................................................................................................................................................. 22

Figure 1-12 Image-formation system components .......................................................................................................... 24

Figure 1-13 Image-formation system motor control ........................................................................................................ 25

Figure 1-14 Stages of image-formation ............................................................................................................................ 26

Figure 1-15 1. Primary charge (conditioning) .................................................................................................................... 27

Figure 1-16 2. Laser-beam exposure (writing) .................................................................................................................. 27

Figure 1-17 3. Developing .................................................................................................................................................. 28

Figure 1-18 4. Transfer ....................................................................................................................................................... 28

Figure 1-19 5. Separation ................................................................................................................................................... 29

Figure 1-20 6. Fusing .......................................................................................................................................................... 29

Figure 1-21 7. Drum cleaning ............................................................................................................................................. 30

Figure 1-22 Toner Cartridge ............................................................................................................................................... 31

Figure 1-23 Pickup, feed, and delivery system .................................................................................................................. 33

Figure 1-24 Sensor locations ............................................................................................................................................. 34

Figure 1-25 Motor, clutch, and solenoid locations ............................................................................................................ 35

Figure 1-26 Switch locations .............................................................................................................................................. 36

Figure 1-27 Pickup-and-feed block ................................................................................................................................... 38

Figure 1-28 Tray 2 pickup ................................................................................................................................................... 39

Figure 1-29 Tray 2 lift operation ........................................................................................................................................ 41

Figure 1-30 Multiple-feed prevention ................................................................................................................................ 42

Figure 1-31 Tray 1 pickup ................................................................................................................................................... 43

Figure 1-32 Skew-feed prevention .................................................................................................................................... 45

ENWW xix

Figure 1-33 Fusing, reverse, and delivery block ................................................................................................................ 47

Figure 1-34 Pressure roller pressurization and depressurization control ....................................................................... 48

Figure 1-35 Reverse and delivery control .......................................................................................................................... 49

Figure 1-36 Face-down delivery ........................................................................................................................................ 50

Figure 1-37 Face-up delivery ............................................................................................................................................. 51

Figure 1-38 Output bin paper-full detection ..................................................................................................................... 52

Figure 1-39 Duplex block ................................................................................................................................................... 53

Figure 1-40 Duplex side registration adjustment operation ............................................................................................. 54

Figure 1-41 Jam detection sensors .................................................................................................................................... 56

Figure 1-42 1x500-sheet paper feeder ............................................................................................................................. 59

Figure 1-43 1x500-sheet paper feeder with cabinet ........................................................................................................ 60

Figure 1-44 2,500-sheet high-capacity paper feeder ....................................................................................................... 61

Figure 1-45 Signal flow for the 1x500-sheet paper feeder controller ............................................................................. 62

Figure 1-46 Pickup and feed components (1x500-sheet paper feeder) ........................................................................... 62

Figure 1-47 Signal flow for the 1x500 paper feeder with cabinet controller ................................................................... 63

Figure 1-48 Pickup and feed components (1x500-sheet paper feeder with cabinet) ...................................................... 64

Figure 1-49 Signal flow for the 2,500-sheet high-capacity paper feeder controller ....................................................... 65

Figure 1-50 Pickup and feed components (2,500-sheet high-capacity paper feeder) .................................................... 65

Figure 1-51 Trays 3 and 4 paper feeder lift operation ...................................................................................................... 68

Figure 1-52 Tray 5 paper feeder lift operation .................................................................................................................. 69

Figure 1-53 1x500-sheet paper feeder media feed sensor .............................................................................................. 70

Figure 1-54 1x500-sheet paper feeder with cabinet media feed sensor ......................................................................... 71

Figure 1-55 2,500-sheet high-capacity paper feeder media feed sensors ...................................................................... 72

Figure 1-56 Document feeder sensors .............................................................................................................................. 74

Figure 1-57 Document feeder paper path ......................................................................................................................... 75

Figure 1-58 Document feeder deskew features ................................................................................................................ 78

Figure 1-59 Document feeder open (book mode) ............................................................................................................. 79

Figure 1-60 Document feeder open (60º to 80º) ............................................................................................................... 80

Figure 1-61 Stapling mailbox ............................................................................................................................................. 81

Figure 1-62 Signal flow for the stapling mailbox .............................................................................................................. 82

Figure 1-63 Stapling mailbox motors ................................................................................................................................ 83

Figure 1-64 Delivery components (stapling mailbox) ....................................................................................................... 85

Figure 1-65 Stapling mailbox stapler operation ................................................................................................................ 87

Figure 1-66 Stapling mailbox stapler operation ................................................................................................................ 88

Figure 1-67 Stapling mailbox stapler operation ................................................................................................................ 89

Figure 1-68 Stapling mailbox stapler operation ................................................................................................................ 90

Figure 1-69 Stapling mailbox sensors for the stapler ....................................................................................................... 91

Figure 1-70 Stapling mailbox sensors for output bin 3 lift operation .............................................................................. 92

Figure 1-71 Stapling mailbox sensors for stacker mode .................................................................................................. 93

Figure 1-72 Stapling mailbox sensors for mail

Figure 1-73 Stapling mailbox sensors for jam detection .................................................................................................. 95

box/jam separation ................................................................................. 94

xx ENWW

Figure 2-1 Open the Control Panel ................................................................................................................................... 111

Figure 2-2 Turn Windows features on or off .................................................................................................................... 111

Figure 2-3 Enable the telnet client feature ..................................................................................................................... 112

Figure 2-4 Select the +3:Administrator item ................................................................................................................... 113

Figure 2-5 Select the +A:Remote Admin item ................................................................................................................. 113

Figure 2-6 Select the 1:Start Telnet item ........................................................................................................................ 113

Figure 2-7 Telnet connecting message ............................................................................................................................ 113

Figure 2-8 Telnet error message ..................................................................................................................................... 114

Figure 2-9 Telnet server function initialized ................................................................................................................... 114

Figure 2-10 Open a command window ............................................................................................................................ 115

Figure 2-11 Start a telnet session .................................................................................................................................... 115

Figure 2-12 Establish a telnet connection ....................................................................................................................... 115

Figure 2-13 Enter the PIN ................................................................................................................................................. 116

Figure 2-14 Remote Admin window ................................................................................................................................. 116

Figure 2-15 Access the administrator menu ................................................................................................................... 117

Figure 2-16 Access the remote admin menu ................................................................................................................... 117

Figure 2-17 Terminate the telnet connection ................................................................................................................. 118

Figure 2-18 Touchscreen blank, white, or dim (no image) .............................................................................................. 128

Figure 2-19 Touchscreen is slow to respond or requires multiple presses to respond ................................................. 129

Figure 2-20 Touchscreen has an unresponsive zone ...................................................................................................... 130

Figure 2-21 No control panel sound ................................................................................................................................ 131

Figure 2-22 Home button is unresponsive ...................................................................................................................... 132

Figure 2-23 Hardware integration pocket (HIP) is not functioning (control panel functional) ...................................... 133

Figure 2-24 Defeating interlocks ..................................................................................................................................... 139

Figure 2-25 Engine test button ........................................................................................................................................ 140

Figure 2-26 Sensors (product base) ................................................................................................................................. 155

Figure 2-27 Sensors (1x500-sheet paper feeder and 1x500-sheet paper feeder with cabinet) ................................... 156

Figure 2-28 Sensors (2,500-sheet high-capacity feeder) (HCI) ...................................................................................... 157

Figure 2-29 Sensors (SSMBM) .......................................................................................................................................... 158

Figure 2-30 Switches (product base) ............................................................................................................................... 159

Figure 2-31 Solenoids (product base) .............................................................................................................................. 160

Figure 2-32 Clutch (product base) ................................................................................................................................... 161

Figure 2-33 Motors (product base) .................................................................................................................................. 162

Figure 2-34 Motors (1 x 500-sheet paper feeder) ........................................................................................................... 163

Figure 2-35 Motors (1x500-sheet paper feeder) ............................................................................................................ 163

Figure 2-36 Motors (2,500-sheet high-capacity feeder) (HCI) ........................................................................................ 164

Figure 2-37 Motors (SSMBM) ............................................................................................................................................ 165

Figure 2-38 Fans (product base) ...................................................................................................................................... 166

Figure 2-39 Main assemblies (product base; 1 of 2) ....................................................................................................... 167

Figure 2-40 Main assemblies (product base; 2 of 2) ....................................................................................................... 168

Figure 2-41 Main assemblies (1x500-sheet paper feeder) ............................................................................................. 169

ENWW xxi

Figure 2-42 Main assemblies (1x 500-sheet paper feeder with cabinet) ....................................................................... 170

Figure 2-43 Main assemblies (2,500-sheet high-capacity feeder) (HCI) ........................................................................ 171

Figure 2-44 Main assemblies (SSMBM; 1 of 2) ................................................................................................................. 172

Figure 2-45 Main assemblies (SSMBM; 2 of 2) ................................................................................................................. 173

Figure 2-46 Main PCAs (product base) ............................................................................................................................. 174

Figure 2-47 Rollers (product base) .................................................................................................................................. 175

Figure 2-48 DC controller PCA connectors ....................................................................................................................... 176

Figure 2-49 Scanner controller board (SCB) connectors ................................................................................................. 178

Figure 2-50 1x500-sheet feeder, 1x500-sheet feeder with cabinet, and 2,500-sheet high-capacity feeder

connectors ........................................................................................................................................................................... 179

Figure 2-51 Stapling mailbox connectors ........................................................................................................................ 180

Figure 2-52 General timing chart (1 of 2) ........................................................................................................................ 182

Figure 2-53 General timing chart (2 of 2) ........................................................................................................................ 183

Figure 2-54 General circuit diagram (product base) (1 of 2) ........................................................................................... 184

Figure 2-55 General circuit diagram (product base) (2 of 2) ........................................................................................... 185

Figure 2-56 General circuit diagram 1x500-sheet feeder, 1x500-sheet feeder with cabinet, and 2,500-sheet

high-capacity feeder (HCI) ................................................................................................................................................... 186

Figure 2-57 General circuit diagram for the stapling mailbox ........................................................................................ 187

Figure 2-58 General circuit diagram for the envelope feeder ......................................................................................... 188

Figure 2-59 Print-quality troubleshooting procedure page ........................................................................................... 190

Figure 2-60 Black print-quality troubleshooting page .................................................................................................... 191

Figure 2-61 Configuration page ....................................................................................................................................... 195

Figure 2-62 HP embedded Jetdirect page ....................................................................................................................... 196

Figure 2-63 Removing paper Stuck in Duplex re-feed path. ........................................................................................... 280

Figure 2-64 Jam detection sensors .................................................................................................................................. 281

Figure 2-65 Opening to the registration assembly ......................................................................................................... 282

Figure 2-66 Paper feed assembly belt ............................................................................................................................. 288

Figure 2-67 Sample event log .......................................................................................................................................... 386

Figure 2-68 Sensors (product base) ................................................................................................................................. 388

Figure 2-69 1x500-sheet paper-feeder and 1x500-sheet paper-feeder with storage cabinet sensors and switches

.............................................................................................................................................................................. 389

Figure 2-70 2,500-sheet high-capacity feeder (HCI) sensors and switches ................................................................... 390

Figure 2-71 Stapling mailbox sensors ............................................................................................................................. 391

Figure A-1 Product space requirements .......................................................................................................................... 475

Figure A-2 Certificate of Volatility 1 of 2) ........................................................................................................................ 477

Figure A-3 Certificate of Volatility (2 of 2) ....................................................................................................................... 478

xxii ENWW

1 Theory of operation

●

Basic operation

●

Formatter-control system

●

Engine-control system

●

Laser/scanner system

●

Image-formation system

●

Pickup, feed, and delivery system

●

Optional paper feeders

●

Scanning/image capture system

●

Stapling mailbox

ENWW 1

Basic operation

/SC

SYS

The product routes all high-level processes through the formatter, which stores font information, processes the print image, and communicates with the host computer.

The basic product operation comprises the following systems:

●

The engine-control system, which includes the power supply and the DC controller

●

The laser/scanner system, which forms the latent image on the photosensitive drum

●

The image-formation system, which transfers a toner image onto the paper

●

The pickup-and-feed system, which uses a system of rollers and belts to transport the paper through the product

●

The option system, which controls the optional paper feeders

●

The scanner system, which scans data and sends it to the formatter for copying or for sending to email

Figure 1-1 Relationship between the main product systems

LASER/SCANNER SYSTEM

LASER

ANNER SYSTEM

IMAGE-FORMATION SYSTEM

ENGINE CONTROL

ENGINE CONTR

SYSTEM

TEM

The interconnect board (ICB) provides connections from the formatter to the following components:

●

DC controller (DCC)

●

Scanner control board (SCB)

●

Control panel, easy-access USB port, and USB hardware integration pocket through a USB cable

PICKUP-AND-FEED SYSTEM

OPTION

PTI

ANNE

SCANNER

The formatter receives +5 volts from the low-voltage power supply (LVPS).

The document feeder/scanner receives +24 volts from the scanner power supply, which is powered by an AC line from the LVPS.

2 Chapter 1 Theory of operation ENWW

The stapling mailbox receives +24 volts from the LVPS through a line in the JetLink cable connecting the stapling mailbox to the product.

Figure 1-2 System block diagram

Control Panel Assembly Contains

Sensors &LEDs

SAT ADF Asset

A4 E-Dupl ex CIS SCANNER MODULE

Scanner

Timing

Scanner Tub

LED

Driver

Walkup USB, HIP Module and

J17

UPS

CIRCUIT

Driver &P/S

+3.3V

+6.5V

Timing

Generator

(x3 or x4)

ADF DC Motors

FB DC Motor

LED

Driver

Timing

A4 Carriage

ADF SENSORS

ADF MOTOR CONTROL

FLATBED SENSORS

Sensors

FLATBED MOTOR

J19

CONTROL

NVRAM

DC Motor

LED

LVDS

LED

LVDS

LED

LVDS

LED

LVDS

LED

LVDS

LED

LVDS

SCANNER FFC

E-Duplex FFC

MICCI-2 channel A/B

MICCI-2 channel C

+5V

MICCI-2 channel E

Scanner ICB

LED

LVDS

LED

LVDS

J18

+3.3V AUX

DC Motor

Driver &P/S

MICCI-2 channel E

ADF & FB SENSORS

ULTASONIC PICK SIGNALS

+32V

24V to 32V

booster

Contr ol

Panel

Assembly

24V

HDMI Data Cable

“Sideband” 12X1 Wire bundle

12-pin SBHDMI

X16 PCI-e Connector

FormatterEngine ICB

+5VSW

+3.3V AUX

USB Switch Control

KEYS

Scanner Signals: 4 Diff Data Pairs& 4DiffClockPairs

E-Duplex Signals: 4 Diff Data Pairs & 4 Diff Clock Pairs

MICCI2 signals

I2C I/F

NVRAM

USB&MassStorage+5V

3.3VStandby

Video I/F

NuBus

Engine FFC

CAN I/F

nENG_ON

Formatter

Power Circuits

USB Data Lines

PCI-express Lines

20Pin

36pin

iPass

36pin

iPass

+3.3VUSW

Formatter+5V

5V +

USB/MS

Formatter +5V

ASIC

Engine

ENWW Basic operation 3

Sequence of operation (product)

A microprocessor on the DC controller controls the operating sequence of the product. The tables in this section describe the basic operating sequence, from when the product power is turned on until the final printed page is delivered to an output bin.

Table 1-1 Sequence of operation (product)

Period Duration Description

Waiting From the time the power is turned on, the door is

closed, or the product exits Sleep mode until the product is ready for printing

Standby From the end of the waiting sequence or the end of

the last rotation until the formatter receives a print command or the product is turned off

Initial rotation From the time the formatter receives a print

command until the paper enters the paper path

Print From the time the first sheet of paper enters the

paper path until the last sheet has passed through the fuser

Last rotation From the time the last sheet of paper exits the

fuser until the motors stop rotating

●

Detects the toner cartridge

●

Cleans the transfer roller

●

Heats the fuser sleeve in the fuser

●

Pressurizes the pressure roller in the fuser

●

The product is in the Ready state.

●

The product enters Sleep mode if the Sleep command is received from the formatter.

●

Stabilizes the photosensitive drum to prepare for printing

●

Prepares the laser/scanner unit

●

Forms the image on the photosensitive drum

●

Transfers the toner to the paper

●

Fuses the toner image onto the paper

●

Moves the last printed sheet into the output bin

●

Cleans the transfer roller

●

Stops the high-voltage power supply

●

Stops the laser/scanner unit

●

If the product receives another print command, the product returns to the initial rotation period when the last rotation is complete.

●

If the product does not receive another print command, the product returns to the standby period.

4 Chapter 1 Theory of operation ENWW

Sequence of operation (scanner)

Table 1-2 Sequence of operation (scanner)

Period Duration Description

Power on When the product is turned on

Initialization From the end of the power-on period until the

product is ready to scan or copy

Standby From the end of the initialization period until a

request for a scan

Scan From the time immediately following a request for

a scan until the scan is complete

●

Scanner motors rotate

●

Product checks the status of all the sensors

●

Scanner lamp illuminates

●

Optical scan head moves from its home position

●

Scanner calibrates

●

Optical scan head returns to its home position

●

Scanner and document feeder initialization complete

●

Scanner calibrates

●

Document feeder checks for paper in the input tray

●

The product enters Sleep mode if the Sleep command is received from the formatter.

●

Scan carriage rests in its home position

●

Scanner turns on

●

Scan start position adjusted

●

Scan performed

●

Data sent to the formatter

ENWW Basic operation 5

Formatter-control system

The formatter performs the following functions:

●

Controls Sleep mode

●

Receives and processes print data from the various product interfaces

●

Monitors control-panel functions and relays product-status information (through the control panel and the network or the bidirectional interface)

●

Develops and coordinates data placement and timing with the DC controller

●

Stores font information

●

Communicates with the host computer through the network or the bidirectional interface

The formatter receives a print job from the network or the bidirectional interface and separates it into image information and instructions that control the printing process. The DC controller synchronizes the imageformation system with the paper-input and -output systems, and then signals the formatter to send the print-image data.

The formatter also provides the electrical interface and mounting locations for one memory DIMM, the hard disk drive or solid state module memory device, and the optional analog fax accessory.

Formatter hardware

The formatter system includes the following components.

Table 1-3 Formatter hardware components

Component Function

Microprocessor Stores fonts and microprocessor control programs

Random access memory (RAM) Stores printing and font information and temporarily stores print-image data before sending it to

Nonvolatile random access memory (NVRAM)

USB Sends and receives data through a USB type B interface connector (connected to the host

Hard-disk drive (HDD)

Solid-state module (SSM)

Real time clock The Wake-up time feature uses this clock. It includes a battery to supply power when the product

HP Jetdirect Inside (JDI) JDI is an Ethernet interface that is part of the formatter.

Sleep mode

the product. RAM data is lost when the product is turned off.

Stores configuration information. NVRAM data is saved when the product is turned off.

computer)

Stores the firmware. A remote firmware upgrade process overwrites and upgrades the firmware on the HDD or SSM.

is turned off.

NOTE: In the General Settings menu (a submenu of the Administration menu), this item is termed Sleep Timer Settings.

6 Chapter 1 Theory of operation ENWW

This feature conserves power after the product has been idle for an adjustable period of time. When the product is in Sleep mode, the product retains all settings, downloaded fonts, and macros. The default setting is for Sleep mode to be enabled, and the product enters Sleep mode after a 30-minute idle time.

The product firmware uses a combination of timers and Sleep settings to control when the product enters a different state as well as what states the product will enter. The available states are listed below, in descending order, from using the most power to using the least power:

●

Active: The product control panel is fully illuminated. The power button light is illuminated.

●

Shallow suspend: The product control panel is dim and the content is grayed out, but is still readable. The power button light is illuminated.

●

Suspend: The product control panel is off (blacked out). The power button light blinks once every three seconds.

●

Deep suspend: The product control panel is off (blacked out). The power button light blinks once every three seconds. The control panel and power button appearance is the same in this state as the suspend state. However, the product is drawing less than 1 watt of power in the deep suspend state (as opposed to 6 watts of power in the suspend state).

●

Off: This state is entered by pressing the power button or removing power from the product. The power button light is not illuminated.

The product exits Sleep mode and enters the warm-up cycle when any of the following events occur:

●

The product receives a print job, valid data, or a PML or PJL command.

●

A control-panel button is pressed or the touchscreen is touched.

●

A cover or door is opened.

●

The engine-test switch is pressed.

●

A paper tray, other than Tray 1, is opened.

NOTE: If the product is in the deep suspend state, opening a paper tray will not cause the product to

exit Sleep mode.

NOTE: Product error messages override the Sleep message. The product enters Sleep mode at the

appropriate time, but the error message continues to appear.

TIP: When the product is in Sleep mode, the sub-power supply is off and the low-voltage power supply is

on. The scanner cannot be used when the product is in Sleep mode.

ENWW Formatter-control system 7

Input/output (I/O)

The product has three I/O interfaces:

●

Hi-Speed USB 2.0

●

10/100/1000 Ethernet LAN connection with IPv4 and IPv6

●

Easy-access USB printing (no computer required)

CPU

The formatter incorporates an 800 MHz processor.

Memory

This section describes the product random access memory (RAM).

Random access memory (RAM)

RAM on the formatter contains the page, I/O buffers, and the font storage area. It stores printing and font information received from the host system, and can also serve to temporarily store a full page of print-image data before the data is sent to the product. The contents of RAM are lost when the product is turned off.

NOTE: If the product encounters a problem when managing available memory, a clearable warning

message displays on the control-panel display.

Firmware

The hard-disk drive (HDD) or solid-state module (SSM) store the firmware. A remote firmware upgrade process overwrites and upgrades the firmware on the HDD or SSM.

Nonvolatile random access memory (NVRAM)

NVRAM on the formatter stores product and user configuration settings. The contents of NVRAM are retained when the product is turned off or disconnected.

Image Resolution Enhancement technology

NOTE: Resolution Enhancement technology (REt) settings that are sent from software programs or product

drivers override the control-panel settings.

The formatter contains circuitry for REt, which modifies the standard video dot data on its way to the DC controller to produce “smoothed” line edges. REt can be turned on or off from the control panel or from some software programs. The default setting is on.

REt produces print output with smooth angles, curves, and edges. All print resolutions, including FastRes 1200, benefit from using REt.

●

ProRes 1200: produces 1200 dpi printing for the best quality in-line art and graphic images.

●

FastRes 1200: produces 1200 dpi print quality for fast, high-quality printing of business text and graphics.

8 Chapter 1 Theory of operation ENWW

HP Memory Enhancement technology

The HP Memory Enhancement technology (MEt) effectively doubles the amount of standard memory through a variety of font- and data-compression methods.

NOTE: MEt is available only in when printing in printer command language (PCL) mode. It is not functional

when printing in PostScript (PS) mode.

Printer job language (PJL)

PJL is an integral part of product configuration, in addition to the standard printer command language (PCL) and PostScript (PS). With standard cabling, the product can use PJL to perform a variety of functions, such as these:

●

Two-way communication with the host computer through a network connection or a USB device port: The product can inform the host about the control-panel settings, and the control-panel settings

can be changed from the host.

●

Dynamic I/O switching: The product uses this switching to be configured with a host on each I/O. The product can receive data from more than one I/O simultaneously, until the I/O buffer is full. This can occur even when the product is offline.

●

Context-sensitive switching: The product can automatically recognize the personality (PS or PCL) of each job and configure itself to serve that personality.

●

Isolation of print environment settings from one print job to the next: For example, if a print job is sent to the product in landscape mode, the subsequent print jobs print in landscape only if they are formatted for landscape printing.

Printer management language (PML)

PML allows remote configuration of the product and status read-back from the product through the I/O ports.

Control panel

The control panel is a 20.3 cm (8 in) full-color SVGA with capacitive touchscreen and adjustable viewing angle. It includes an easy-access USB port for walk-up printing and a hardware integration pocket for thirdparty USB devices, such as card readers.

The control panel has a diagnostic mode to allow testing of the touchscreen, Home button, and speaker. The control panel does not require calibration.

The M630z model has a QWERTY retractable keyboard beneath the control panel. The keys are mapped to a specific language in the same way the virtual keyboard on the product control panel is mapped. Selecting a different keyboard layout for the virtual keyboard remaps the keys on the physical keyboard to match the new settings.

Scanner interface

The formatter receives data from the scanner to produce copies and to send scanned data in email format.

ENWW Formatter-control system 9

Engine-control system

user co

The engine-control system receives commands from the formatter and interacts with the other main systems to coordinate all product functions. The engine-control system consists of the following components:

●

DC controller

●

Low-voltage power supply (LVPS)

●

High-voltage power supply (HVPS)

●

Fuser control

This system controls the laser/scanner, image-formation, and pickup-and-feed systems. The microprocessor on the DC controller controls the operating sequence of the product.

Figure 1-3 Engine control system block diagram

Engine-control system

DC controller

Laser/scanner system

Image-formation system

Formatter

Low-voltage power supply

igh-voltage power suppl

High-voltage power supply

Fuser control

ntrol

Pickup, feed and delivery

Pickup, feed and deliver

system

stem

Option

ptio

Scanner

canner

10 Chapter 1 Theory of operation ENWW

DC controller

use

sfe

’y

The DC controller controls the operation of the product and its components. The DC controller starts the product operation when the product power is turned on and the power supply sends DC voltage to the DC controller. After the product enters the standby period, the DC controller sends out various signals to operate motors, solenoids, and other product components based on the print command and image data that the host computer sends.

Figure 1-4 DC controller block diagram

Tran

Transfer roller

Cartridge

Fuser

artrid

r roller

Low-volta

Low-voltage

power supply

ower suppl

igh-volta

High-voltage

ower suppl

power supply

DC controller

Motor

tor

Fan

Solenoid

olenoi

Clutch

lutc

Photointerrupter

Sensor

ensor

Control panel

ontrol panel

Image scanner

Formatter

ICB

Switch

witc

Accessory

Accessor

Laser scanner ass’y

Laser scanner ass

Duplex unit

uplex uni

ENWW Engine-control system 11

Motors

The product has nine motors. The motors drive the components in the paper-feed and image-formation systems.

The DC controller monitors the feed motor, drum motor, and fuser motor to determine motor failure. The DC controller does not detect motor failure in the intermediate reverse assembly motor, the reverse assembly motor, the delivery motor, or the duplex re-pickup motor. Therefore, a jam occurs when one of these motors fails.

Figure 1-5 Motors

M104

M106

M105

M102

M101

M107

M108

M299

M103

Table 1-4 Motors

Name Purpose

Feed motor (M101) Drives the following rollers: Tray 1 pickup roller, Tray 2 pickup roller, feed roller, and

rollers for the optional paper feeders

Drum motor (M102) Drives the transfer-charging roller, photosensitive drum, and developing cylinder

Cassette lifter motor (M103) Moves the lifting plate

Intermediate reverse assembly motor (M104)

Reverse assembly motor (M105) Drives the reverse assembly roller

Delivery motor (M106) Drives the intermediate delivery roller and the delivery roller

Duplex re-pickup motor (M107) Drives the duplex feed roller

Scanner motor (M108) Drives the scanner mirror

Fuser motor (M299) Drives the pressure roller and fuser delivery roller; pressurizes or releases the pressure

Drives the intermediate reverse assembly roller

roller

12 Chapter 1 Theory of operation ENWW

Fans

The product has seven cooling fans for preventing the temperature from rising in the product.

The DC controller determines a fan failure and notifies the formatter when the fan locks for a specified period of time from when the fan starts up.

Figure 1-6 Fans

FN107

FN103

FN102

FN105

FN101

FN301

FN104

Table 1-5 Fans

Name Cooling area Type Motor speed Failure detection

Main fan (FN101) Cartridge area, engine

power supply area and laser scanner area

Laser scanner fan (FN102)

Cartridge front side fan (FN103)

Low-voltage power supply fan (FN104)

Reverse fan (FN105) Reverse area Intake 1-speed Yes

Duplex fan (FN107) Duplex feed area Intake 1-speed Yes

Cartridge fan (FN301) Cartridge area Intake 1-speed Yes

Laser scanner area Intake 1-speed Yes

Cartridge area Intake 1-speed Yes

Low-voltage power supply area

Intake 2-speed Yes

ENWW Engine-control system 13

High-voltage power supply

primary charging rolle

developing rolle

cui

use

user sleeve

use

cui

osens

essure rolle

The high-voltage power supply applies biases to the following components:

●

Primary charging roller

●

Developing roller

●

Transfer roller

●

Fuser sleeve

●

Pressure roller

Figure 1-7 High-voltage power supply

DC controll

DC controller

Engine power supp

Engine power supply

Fuser

ias cir

bias circuit

Primar

Primary

harging bias

charging bias

circuit

Fuser

Fuser sleeve

Pressure roller

artrid

Cartridge

To primary charging roller

To developing roller

Developin

Developing

ias cir

bias circuit

Photosensitive drum

Phot

Transfer roller

Transfer bias

circuit

itive drum

The primary charging bias is used to charge the surface of the photosensitive drum evenly to prepare for image formation. The primary charging bias circuit generates the bias.

The developing bias is used to adhere toner to an electrostatic latent image formed on the photosensitive drum. The developing bias circuit generates the bias.

The transfer bias is used to transfer the toner from the photosensitive drum onto the paper. The transfer bias circuit generates the bias.

The fuser bias is used to stabilize the paper feed and improve the print quality. The fuser bias circuit generates the bias.

14 Chapter 1 Theory of operation ENWW

Low-voltage power supply

061

oss

/SOFTSWSNS

/AC200

ock

The low-voltage power supply converts the AC power from the power source into the DC voltage that the product components use.

Figure 1-8 Low-voltage power supply circuit

AC power

C power

Low-voltage power supply

Low-voltage power suppl

DC controller

ectifyin

Rectifying

ircui

circuit

+5V

eneratio

generation

ircui

circuit

Protecti

Protection

ircui

circuit

Fuse FU1

Fuse

FU2

rocr

Zerocross

ircui

circuit

witc

Switch

ircui

circuit

ectifyin

Rectifying

circuit

Engin

Engine

ower suppl

power supply

ircui

Fuser

Power swit

Power switch

+24V

ircui

circuit

ircui

SW1061

/SOFTSWSNS

PSREM24

PSREM24V

PFC-Z PWRRM

PFC-Z PWRRMT

PWR_SAVE

PWR_SAV

Interl

Interlock

wit

switch

SW101

ZER

/ZEROX

24VA

+24VA

24VB

+24VB

/AC200

24VB

+24VB

24VB

+24VB

eneratio

generation

Protection

Protecti

+3.3VB

.3VB

.3VA

+3.3VA

24VB

+24VB

24VA

+24VA

Switch

witc

circuit

ircui

+24VC

24V

+3.3VB

Switch

witc

circuit

ircui

.3VB

ICB

rmatter

Formatter

WAKE_ENG

WAKE_EN

WAKE_VC

WAKE_V

+5VA

+3.3V

generation

eneratio

circuit

ircui

+3.3VA

.3VA

Protection

Protecti

circuit

ircui

The low-voltage power supply converts the AC power into three DC voltages, which it then subdivides, as described in the following table.

ENWW Engine-control system 15

Table 1-6 Converted DC voltages

DC voltage Behavior

+24VA Stopped when the product is turned off or is in Sleep mode

+24V

+5V +5VA Constantly supplied

+3.3V

+24VB Interrupted when the cartridge door opens

+24VC Interrupted when the product detects no fuser installed

+3.3VA Constantly supplied

+3.3VB Stopped when the product is turned off or is in Sleep mode

Overcurrent/overvoltage protection

The low-voltage power supply automatically stops supplying the DC voltage to the product components whenever it detects excessive current or abnormal voltage. The low-voltage power supply has a protective circuit against overcurrent and overvoltage to prevent failures in the power supply circuit.

CAUTION: If DC voltage is not being supplied from the low-voltage power supply, the protective function

might be running. In this case, turn the power switch off and unplug the power cord.

Do not turn the power switch on until the root cause is found and corrected.

If the protective function is active, the DC controller notifies the formatter of a low-voltage power supply failure. In addition, the low-voltage power supply has two fuses (FU1 and FU2) to protect against overcurrent. If over-current flows into the AC line, the fuses stop the AC power.

Voltage detection

The product detects the power supply voltage that is connected to the product. The DC controller monitors the POWERSUPPLY VOLTAGE (/AC200) signal and detects power supply voltage, whether 100 volts or 200 volts, to control the fuser operation. The DC controller determines a low-voltage power supply failure and notifies the formatter when the power supply voltage is out of a specified range.

Safety

For personal safety, the product interrupts +24VB power when the interlock switch is turned off. As a result, the DC voltage to the following components stops. See

●

Low-voltage power supply

●

High-voltage power supply

●

Fuser motor (M299)

●

Laser scanner fan (FN102)

●

Cartridge front-side fan (FN103)

●

Reverse fan (FN105)

●

Cartridge fan (FN301)

Table 1-6 Converted DC voltages on page 16.

16 Chapter 1 Theory of operation ENWW

WARNING! The remote switch control circuit turns the product power on or off such that AC power flows

even when the power switch is turned off. Unplug the power cord before disassembling the product.

Sleep (power save) mode

Sleep mode conserves energy by stopping the power to several components when the product is idle. The DC controller determines a low-voltage power supply failure and notifies the formatter if the power supply of +24 volts is lower than a specified value when the product exits Sleep mode and enters the standby period.

Low-voltage power supply functions

The product has the following low-voltage power supply functions.

Table 1-7 Low-voltage power supply functions

Function Supported feature

Sleep mode Yes

Power supply voltage detection Yes

Automatic power OFF No

Automatic power ON/OFF No

Active OFF Yes

Inactive OFF Yes

Network mode No

Power switch illumination Yes

Low-voltage power supply failure detection Yes

ENWW Engine-control system 17

Fuser control

cui

signal

essure rolle

The fuser heater control circuit and the fuser heater safety circuit control the fuser temperature according to commands from the DC controller. The product uses an on-demand fusing method.

Figure 1-9 Fuser components

1, H

H1, H2

TH2

TH1

TP1

FUSER TEMPERATURE signal

FUSER

FUSER HEATER CONTROL signal

Fuser sleeve

r sleev

Pressure roller

Fuser heater control

r heater control

circuit

Low-voltage power supply

Fuser heater safety

Fuser heater safet

circuit

DC controller

DC controll

Table 1-8 Fuser components

Component name Function

H1 Fuser main heater Heats the fuser sleeve

H2 Fuser sub-heater Heats the fuser sleeve

TH1 Main thermistor Detects the temperature at the center of the fuser heater

(contact type)

TH2 Sub-thermistor Detects the temperature on one end of the fuser heater (contact

type)

TP1 Thermoswitch Prevents an abnormal temperature rise of the fuser heater

(contact type)

18 Chapter 1 Theory of operation ENWW

Fuser temperature control

/FS

/AC200

/RLD

001L101

user co

essure rolle

2100V200V

oss

use

cui

use

user sleeve ass’

use

)

The fuser temperature control maintains the temperature of the fuser heater at its targeted temperature.

The DC controller detects the fuser temperature by monitoring the FUSER TEMPERATURE (FSRTH1 and FSRTH2) signals. The DC controller outputs the FUSER HEATER CONTROL (FSRD1 and FSRD2) signals, so that the fuser heater control circuit controls the fuser heater accordingly.

Figure 1-10 Fuser circuit

RL101

RL102

r heater

Fuser heater

ntrol cir

control circuit

AC inpu

AC input

Low-vol

Low-voltage power supply (LPU)

Fuser control

Zerocr

Zerocross

circuit

elay contro

Relay control

circuit

urren

Current

tecti

detection

circuit

ntrol

ZER

/ZEROX

/RLD

FSRSAF

FSRSAFE

RRM

CURRMS

FSRD1

FSRD

FSRD2

FSRTH2

DC controll

DC controller

r heater

Fuser heater

afety circu

safety circuit

TH2

TP1

TH1

1, H

H1, H2

Pressure roller

Engine power supply (EPU

Engine power supply (EPU)

JP1001

100V: Open 200V: Close

Fuser

Fuser sleeve ass’y

/AC200

FSRTH1

/FSRARI

RAR

ENWW Engine-control system 19

Fuser sleeve temperature protection

Fuser heater protection is a feature that detects excessive temperatures in the fuser and interrupts the power supply to the fuser heater.

The following three protective components prevent the fuser heater from reaching excessive temperatures:

●

DC controller: The DC controller monitors the detected temperature of the thermistors. The DC controller deactivates the FUSER HEATER CONTROL signal and releases the relays (RL101 and RL102) to interrupt power supply to the fuser heater when it detects an excessive temperature.

●

Fuser heater safety circuit: The fuser heater safety circuit monitors the detected temperature of the thermistors. The fuser heater safety circuit deactivates the FUSER HEATER CONTROL signal and releases the relays (RL101 and RL102) to interrupt power supply to the fuser heater when it detects an excessive temperature.

●

Thermoswitch: If the temperature of the fuser heater is abnormally high, the contact of the thermoswitch breaks to interrupt power supply to the fuser heater.

Fuser failure detection

The DC controller determines if the fuser functions properly. The DC controller determines a fuser failure, interrupts power supply to the fuser heater, and notifies the formatter of a failure status when it encounters any of following conditions:

●

Abnormal temperature rise

◦

The main thermistor does not detect 15°C (59°F) or higher within a specified period of time from when the fuser heater is turned on.

◦

The main thermistor does not detect 100°C (212°F) or higher within a specified period of time from when the fuser heater is turned on.

◦

The main thermistor does not detect targeted temperature minus 5°C (41°F) within a specified period of time from when the fuser heater is turned on.

●

Abnormally low temperature

◦

The main thermistor detects 49°C (120.2°F) or lower continuously for a specified period of time after it once detects 100°C (212°F) or higher.

◦

The main thermistor detects targeted temperature minus specified degrees or lower continuously for a specified period of time after the TOP signal for the first page is output.

◦

The sub-thermistor detects 49°C (120.2°F) or lower continuously for a specified period of time after it once detects 100°C (212°F) or higher.

●

Abnormally high temperature

◦

The main thermistor detects 255°C (491°F) or higher.

◦

The sub-thermistor detects 285°C (545°F)or higher.

●

Frequency detection circuit failure

◦

The ZEROCROSS signal is not detected within a specified period of time after the product is turned on.

●

Fuser-presence detection

20 Chapter 1 Theory of operation ENWW

The DC controller determines if the fuser is installed in the product and notifies the formatter when it detects the fuser is absent. The DC controller detects fuser presence from the FUSER PRESENCE (/ FUSERARI) signal when any of the following occurs:

◦

The product is turned on.

◦

The door is closed.

Pressure roller cleaning

The formatter periodically initiates the pressure roller cleaning function to clear the toner accumulated on the pressure roller surface by transferring it to a piece of paper. Following is the operational sequence of pressure roller cleaning:

1. The DC controller initiates picking a sheet of paper from the designated input source when it receives

the cleaning command from the formatter.

2. The fuser motor repeatedly drives-and-stops at a specified interval when the trailing edge of the paper

passes through the transfer roller. The fuser heater is turned on-and-off at the same time.

3. The fuser fuses the toner adhered to the pressure roller surface onto the paper; thus, cleaning the

pressure roller.

4. The paper with the fused toner exits the product.

Ambient-temperature detection

The product contains an environmental sensor (TH3) that measures the air temperature of the surrounding environment. The product automatically adjusts the temperature settings in the fuser to adjust for changes in the ambient temperature.

ENWW Engine-control system 21

Laser/scanner system

osens

aser ass’

The DC controller controls the laser scanner system according to commands from the formatter. The DC controller controls the internal components in the laser scanner system to form a latent electrostatic image on the photosensitive drum according to the VIDEO signals.

The following are the main components of the laser scanner system:

●

Laser assembly

●

Scanner motor assembly

●

Beam Detect (BD) sensor

●

Scanning mirror

●

BD mirror

Figure 1-11 Laser/scanner

DC controller

DC controll

Laser ass’y

Scanning mirror

canning mirror

BD mirror

Scanner motor ass’y

canner motor ass’

Photosensitive drum

Phot

itive drum

BD sensor

22 Chapter 1 Theory of operation ENWW

Laser/scanner failure

The DC controller determines an optical unit failure and notifies the formatter of the error status when any of the following occurs:

●

Beam Detect (BD) failure: The BD signal is not detected within a specified period of time from when the laser/scanner starts. Or, a specified BD interval is not detected within a specified period of time from when the laser/scanner is ready.

●

Laser/scanner motor startup failure: The scanner motor does not reach a specified rotation frequency within a specified period of time from when the laser/scanner starts up.

●

Laser/scanner motor abnormal rotation: The laser/scanner motor does not reach a specified rotational frequency within a specified period of time during a print operation.

Safety

The laser/scanner assembly has a mechanical laser shutter. For the safety of users and service technicians, the laser shutter interrupts the optical path of the laser/scanner assembly when the top door is opened (SW101).

ENWW Laser/scanner system 23

Image-formation system

aser scanner ass’

use

The DC controller controls the image-formation system according to commands from the formatter. The DC controller controls the internal components of the image-formation system to form the toner image on the photosensitive drum surface, transfer the image to the paper, and then fuse it to the paper.

The following are the main components of the image-formation system:

●

Toner cartridge

●

Transfer roller

●

Fuser

●

Laser/scanner assembly

●

Engine power supply

Figure 1-12 Image-formation system components

Image scanner

Laser scanner ass’y

Fuser

Engine power supply

Engine power suppl

DC controller

DC controll

The DC controller rotates the drum motor to drive the following components:

Toner

artrid

Cartridge

Transfer roller

24 Chapter 1 Theory of operation ENWW

●

Photosensitive drum

●

Developing roller

●

osens

use

essure rolle

user sleeve

use

Primary charging roller (follows the photosensitive drum)

●

Transfer roller (follows the photosensitive drum)

The DC controller rotates the fuser motor to drive the following components:

●

Pressure roller

●

Fuser sleeve (follows the pressure roller)

Figure 1-13 Image-formation system motor control

Image scanner

Fuser sleeve

Toner

Cartridge

artrid

Primary charging roller

Primary charging roll

Developing roll

Developing roller

Drum motor

Pressure roller

Fuser motor

r motor

Fuser

DC controller

DC controll

Transfer roller

Phot

Photosensitive drum

drum

itiv

ENWW Image-formation system 25

Electrophotographic process

ock

Following are the stages of the electrophotographic process (image formation):

Figure 1-14 Stages of image-formation

Electrostatic latent image formation block

Electrostatic latent image formation bloc

8. Drum charge elimination

leaning bloc

Cleaning block

Paper delivery

Paper deliver

. Fusin

6. Fusing

Fusing block

Fusing bloc

2. Laser beam exposure

2. Laser beam exposur

1. Primary charge

7. Drum cleanin

7. Drum cleaning

5. Separation

Transfer block

Transfer bl

. Developin

3. Developing

4. Transfer

Paper picku

Paper pickup

Paper path

Paper pat

Direction of drum rotation

Direction of drum rotati

Developing block

Developing bloc

egistratio

Registration

Tray 1 picku

Tray 1 pickup

26 Chapter 1 Theory of operation ENWW

Step 1: Primary charge (conditioning)

osens

aser bea

osens

The primary-charging roller in the toner cartridge applies a uniform negative charge to the surface of the drum. The primary-charging roller is made of conductive rubber. An AC bias applied to the roller erases any residual charges from any previous image. The charging roller applies a negative DC bias to create a uniform negative potential on the drum surface.

Figure 1-15 1. Primary charge (conditioning)

Primary charging roller

Primary charging roll

Photosensitive drum

Phot

itive drum

Primary charging bias

Step 2: Laser-beam exposure (writing)

Two laser diodes project laser beams onto a rotating scanning mirror. As the mirror rotates, the beams reflect off of the mirror, first through a set of focusing lenses, then off a mirror, and finally through a slot in the top of the toner cartridge, and onto the photosensitive drum. The twin beams sweep the drum from left to right, discharging the negative potential wherever the beams strike the surface. This creates a latent electrostatic image, which later is developed into a visible image.

Figure 1-16 2. Laser-beam exposure (writing)

Phot

Photosensitive drum

Laser beam

itive drum

ENWW Image-formation system 27

Step 3: Developing

osens

At this stage of the process, the latent electrostatic image is present on the drum. The toner particles obtain a negative surface charge by rubbing against the developing cylinder, which is connected to a negative DC supply. The discharged (exposed, grounded) areas of the drum attract the negatively charged toner, and the negatively charged (unexposed) areas repel the toner.

Figure 1-17 3. Developing

Developer blade

Developer blad

Developing roller

Developing roll

Developing bias

Step 4: Transfer

During the transfer process, the toner image on the drum surface transfers to the paper. The transfer charging roller applies a positive charge to the back of the paper, which attracts the negatively charged toner on the drum surface to the paper.

Figure 1-18 4. Transfer

Phot

Photosensitive

Transfer roller

Photosensitive drum

Phot

itiv

rum

drum

Transfer bias

itive drum

Paper

28 Chapter 1 Theory of operation ENWW

Step 5: Separation

osens

ush

user bias

user sleeve

use

essure rolle

During the separating process, the paper separates from the drum. To stabilize the feed system and to prevent dropouts on the printed image at low temperature and humidity, the static-charge eliminator reduces the charge on the back of the paper.

Figure 1-19 5. Separation

Static charge eliminator

Step 6: Fusing

Photosensitive

Phot

Transfer roller

drum

rum

itiv

Paper

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

Figure 1-20 6. Fusing

r heater

Fuser sleeve

Fuser bias

Fuser heater

Brush

Pressure roller

Toner

Paper

Fuser bias

ENWW Image-formation system 29

Step 7: Drum cleaning

osens

The cleaning blade is in contact with the surface of the drum at all times. As the drum rotates during printing, the cleaning blade scrapes excess toner into the waste-toner receptacle.

Figure 1-21 7. Drum cleaning

leaning blad

Cleaning blade

Waste toner

receptacle

eceptacl

Phot

Photosensitive

rum

drum

itiv

30 Chapter 1 Theory of operation ENWW

Toner cartridge

osens

The toner cartridge consists of a reservoir of toner and the following components:

●

Photosensitive drum

●

Developing roller

●

Primary charging roller

●

Memory chip

Figure 1-22 Toner Cartridge

DC controll

DC controller

Engine power supply

Engine power suppl

Drum motor

artridge sensor

Cartridge sensor

PS11

PS115

emory chi

Memory chip

The memory chip is non-volatile memory that stores information about the usage of the toner cartridge. The product reads and writes the data in the memory chip.

The DC controller determines a memory chip error and notifies the formatter when it fails to either read from or write to the memory chip.

Cartridge presence and life detection

The DC controller performs the following functions related to both detecting the presence of the toner cartridge and determining the remaining life of the cartridge:

Primary

Primar

charging

hargin

roller

roll

Developing roll

Developing roller

Phot

Photosensitive

drum

itiv

artrid

Cartridge

●

Cartridge presence detection: The DC controller detects the presence of the cartridge by monitoring the cartridge sensor (PS115) when both of the following occur:

ENWW Image-formation system 31

◦

The product is turned on.

◦

The door is closed.

The DC controller notifies the formatter when it detects the cartridge is missing.

●

Toner level detection: The DC controller detects the remaining toner in the cartridge according to the TONER LEVEL signal, and then notifies the formatter of the remaining toner level.

●

Cartridge life detection: The DC controller detects the cartridge life by monitoring the total operating time or remaining toner level of the toner cartridge. The DC controller determines a cartridge is at the end of life and notifies the formatter when total operating time of the cartridge reaches a specified period of time or the cartridge runs out of toner.

32 Chapter 1 Theory of operation ENWW

Pickup, feed, and delivery system

The DC controller controls the pickup, feed, and delivery system according to commands from the formatter. This system consists of three parts:

●

The pickup-and-feed block encompasses the paper path from each tray to the fuser entrance.

●

The fusing, reverse, and delivery block encompasses the paper path from the fuser entrance to the output device.

●

The duplex block emcompasses the paper path to reverse the paper in the duplex reverse area for twosided printing

Figure 1-23 Pickup, feed, and delivery system

Fusing, switchback, and delivery block

using, switchback, and delivery block

Fusing, reverse, and delivery block

Duplex block

Duplex bloc

DC controller

DC controll

Pickup-and-feed block

Pickup-and-feed bloc

Simplex paper path

implex paper path

Duplex paper path

ENWW Pickup, feed, and delivery system 33

Figure 1-24 Sensor locations

PS110

PS109

PS111

PS113

PS907

PS107

PS101

PS106

PS108

PS102

PS103

PS114

PS112

PS104

PS700

PS699

SW102

Table 1-9 Sensors

Abbreviation Component Replacement part number

PS101 Tray 2 media out sensor Paper pickup assembly (RM1-5919-000CN)

PS102 Pre-feed sensor Part not available

PS103 TOP sensor Part not available

PS104 Output bin media-full sensor Part not available

PS106 Media width sensor 1 Part not available

PS107 Tray 2 media stack surface sensor 1 Paper pickup assembly (RM1-5919-000CN)

PS108 Media width sensor 2 Part not available

PS109 Duplex side registration sensor Duplex assembly kit (B3G84-67903)

PS110 Reverse sensor Reverse assembly (RM2-5799-000CN)

PS111 Reverse jam sensor Reverse assembly (RM2-5799-000CN)

PS112 Delivery sensor Reverse assembly (RM2-5799-000CN)

PS113 Duplex re-pickup sensor Duplex assembly kit (B3G84-67903)

PS114 Tray 1 media out sensor MP (Tray 1) pickup assembly (RM2-5822-000CN)

PS115 Cartridge sensor Cartridge sensor assembly (RM1-8323-000CN )

PS699 Fuser pressure release sensor Fuser replacement kit, 110V (B3M77-67903)

Fuser replacement kit, 220V (B3M78-67903)

PS700 Fuser delivery sensor Fuser replacement kit, 110V (B3M77-67903)

Fuser replacement kit, 220V (B3M78-67903)

34 Chapter 1 Theory of operation ENWW

Table 1-9 Sensors (continued)

06L105

99107L102

01101103

ease ca

Abbreviation Component Replacement part number

PS907 Tray 2 media stack surface sensor 2 Paper pickup assembly (RM1-5919-000CN)

SW102 Tray 2 media size switch Size detect cable (RM1-7179-000CN)

Figure 1-25 Motor, clutch, and solenoid locations

M104M106

104

verse roller

Reverse roller

disengagement arm

M102

M105

SL106SL105

Face-up flapper

Tray pickup arm

Fuser pressure

user pressur

release cam

M299

M107

Side registration guide

SL101

Lifter

Cam

SL102

M101M103

Table 1-10 Motors, clutch, and solenoids

Abbreviation Component Replacement part number

CL101 Media feed clutch Paper feed roller assembly (RM1-8411-010CN)

M101 Feed motor Feed motor assembly (RM2-5942-000CN)

M102 Drum motor Drum motor assembly (RM1-8358-000CN)

M103 Tray 2 lifter motor Lifter assembly (RM1-5914-000CN)

CL101

M104 Intermediate reverse assembly motor Reverse assembly (RM2-5799-000CN)

M105 Reverse motor Reverse assembly (RM2-5799-000CN)

M106 Delivery motor Reverse assembly (RM2-5799-000CN)

ENWW Pickup, feed, and delivery system 35

Table 1-10 Motors, clutch, and solenoids (continued)

05W103

1W102

Abbreviation Component Replacement part number

M107 Duplex re-pickup motor Duplex assembly kit (B3G84-67903)

M108 Scanner motor (not shown) Laser/scanner assembly (RM1-8406-000CN)

M299 Fuser motor Fuser motor assembly (RM1-5051-020CN)

SL101 Tray 2 pickup solenoid Paper pickup assembly (RM1-5919-000CN)

SL102 Tray 1 pickup solenoid MP (Tray 1) pickup assembly (RM2-5822-000CN)

SL105 Face-up solenoid Reverse assembly (RM2-5799-000CN)

SL106 Reverse roller disengagement solenoid Reverse assembly (RM2-5799-000CN)

Figure 1-26 Switch locations

SW104

SW1

SW103

SW700

SW101

SW102

SW105

Table 1-11 Switches

Abbreviation Component Replacement part number

SW1061 Power switch Power switch assembly (RM2-5818-000CN)

SW101 Interlock switch Door switch cable assembly (RM2-7478-000CN)

SW102 Tray 2 media size switch Part not available

36 Chapter 1 Theory of operation ENWW

Table 1-11 Switches (continued)

Abbreviation Component Replacement part number

SW103 Face-up bin detection switch Part not available

SW104 Output accessory detection switch Push button switch assembly (RM1-7374-000CN)

SW105 Tray 2 door open detection switch Right door sensor assembly (RM1-1045-000CN)

SW106 Cartridge door open detection switch (not shown) Door sensor cable assembly (RM2-7476-000CN)

SW700 Test-print switch DC controller PCA assembly (RM2-7458-000CN)

ENWW Pickup, feed, and delivery system 37

Pickup-and-feed block

The pickup-and-feed block picks one sheet of paper from the tray and feeds it into the fuser.

Figure 1-27 Pickup-and-feed block

Tray 1

Tray 2

38 Chapter 1 Theory of operation ENWW

Tray 2 pickup

01L101

The operational sequence of picking one sheet of paper from Tray 2 is as follows:

1. The DC controller rotates the feed motor when it receives a print command from the formatter.

2. The Tray 2 pickup roller, Tray 2 feed roller, and Tray 2 separation roller rotate.

3. The Tray 2 pickup solenoid drives at a specified timing.

4. The Tray 2 pickup cam rotates.

5. As the Tray 2 pickup arm lowers, the Tray 2 pickup roller touches the surface of the top sheet of paper.

6. The Tray 2 separation roller removes any multiply-fed sheets.

7. One sheet of paper feeds into the product.

Figure 1-28 Tray 2 pickup

DC controller

DC controll

M101

Feed motor

motor

Tray 2 pickup solenoid

Tray 2 pickup solenoi

Tray 2 pickup roller

SL101

Tray 2 pickup arm

Lifting plate

Liing plat

Tray 2 feed roller

Tray 2 separation roller

Tray 2 pickup cam

1: The Tray 2 pickup cam rotates

1:The Tray 2 pickup cam rotates

2: The Tray 2 pickup arm lowers.

The Tray 2 pickup arm lowers.

3: The Tray 2 pickup roller picks

:The Tray 2 pickup roller picks

up the paper.

up the

ENWW Pickup, feed, and delivery system 39

Tray 2 paper-size detection and tray-present detection

The DC controller determines the size of the paper loaded in Tray 2 and also whether the tray is installed in the product by monitoring the Tray 2 media size switch. The DC controller notifies the formatter when the detected paper size does not match the size specified by the formatter or if the tray is absent.

The Tray 2 media size switch contains three sub-switches. The DC controller detects the size of the paper and the presence of the tray based on the combination of the switches.

Table 1-12 Tray 2 media-size detection switch components

Tray presence or media size Top switch Center switch Bottom switch

A4 On Off Off

Letter Off On Off

B5 Off On On

A5 Off Off On

Executive On Off On

LegalOnOnOff

Custom size On On On

No tray Off Off Off

40 Chapter 1 Theory of operation ENWW

Tray 2 lift operation

sensor

The Tray 2 lift operation keeps the paper stack surface at the correct pickup position.

The DC controller detects the position of the stack surface by monitoring the Tray 2 media stack surface sensors under the following conditions:

●

When the product is turned on

●

When the tray is inserted

●

When the paper stack surface in the tray lowers

Figure 1-29 Tray 2 lift operation

Tray lifter motor

DC controller

DC controll

Tray media

stack surface sensor 2

Tray media

stack surface sensor 1

Tray media

presence sensor

Tray media stack surface sensor lever

Lifting plate

Liing plat

The sequence of the Tray 2 lift operation is as follows:

1. The DC controller rotates the Tray 2 lifter motor.

2. The lifter moves up.

3. The tray lifter motor stops when the tray media stack surface sensor 2 detects the paper stack surface.

4. The tray lifter motor rotates again when the tray media stack surface sensor 1 detects that the paper

stack surface lowers.

NOTE: The DC controller determines a tray lifter motor failure and notifies the formatter if the tray

media stack surface sensor 1 or sensor 2 does not detect the paper stack surface within a specified period of time after the tray lifter motor starts rotating.

Tray 2 paper-presence detection

Lifter

Tray media presence sensor lever

The DC controller detects the presence of paper in Tray 2 by monitoring the Tray 2 media presence sensor. When this sensor does not detect paper in the tray, the DC controller notifies the formatter.

ENWW Pickup, feed, and delivery system 41

Tray 2 multiple-feed prevention

eed>

In Tray 2, the separation roller prevents multiple sheets of paper from entering the paper path. The Tray 2 pickup roller drives the separation roller through a sheet of paper.

The rotation of the Tray 2 feed roller through the sheet drives the separation roller. Because the feed roller is equipped with a torque limiter, only one sheet feeds into the product.

The low friction force between the sheets weakens the driving force from the Tray 2 feed roller. Therefore, the separation roller is driven by its own driving force and holds back any multiply-fed sheets from the cassette.

Figure 1-30 Multiple-feed prevention

Tray 2 pickup roller

Paper

Tray 2 feed roller

Tray 2 separation roller

Tray 2 separation roller follows

Tray 2 separation roller follows the Tray 2 feed roller

the Tray 2 feed roller

Driving force from the feed motor

Normal-f

<Multiple-feed><Normal-feed>

Multiple-feed

42 Chapter 1 Theory of operation ENWW

Tray 1 pickup

01L102

eed moto

Tray 1 pickup solenoi

Figure 1-31 Tray 1 pickup

Tray 1

Tray feed roller

roll

DC controller

DC controll

Feed motor

Tray

Tray 1 pickup roller

ickup roll

SL102

M101

Tray 1 pickup solenoid

Paper

Tray 1 separation roller

PS114

Tray 1 media presence sensor

Tray 1 media presence senso

Tray 1 pickup cam

Tray 1 pickup c

Lifting plate

The operational sequence of picking one sheet of paper from Tray 1 is as follows:

1. The DC controller rotates the feed motor when it receives a print command from the formatter.

2. The Tray 1 pickup solenoid drives at a specified timing.

3. The Tray 1 pickup roller rotates.

4. The Tray 1 pickup cam rotates and the lifting plate moves up.

5. The Tray 1 pickup roller touches the surface of the top sheet of paper.

6. The Tray 1 separation roller removes any multiply-fed sheets.

7. One sheet of paper feeds into the product.

NOTE: Multiple-feed prevention for Tray 1 is the same mechanism as that for Tray 2. See Tray 2

multiple-feed prevention on page 42

ENWW Pickup, feed, and delivery system 43

Tray 1 paper-presence detection

The DC controller detects the presence of paper in Tray 1 by monitoring the Tray 1 media presence sensor during the initial rotation period when the product is turned on or when the product exits Sleep mode.

Feed speed control

The feed speed control adjusts the feed speed to improve the print quality depending upon the paper type. The DC controller feeds the paper at a specified speed, depending on the print mode designated by the formatter.

Table 1-13 Feed speed control

Print mode Feed speed

Auto NA NA

Normal 1/1, 1/2 1/2

Heavy media 1 1/1, 1/2 1/2

Heavy media 2 1/2 1/2

Light media 2 1/1, 1/2 1/2

OHT 1/2 1/2

Legal / Letter / A4 Executive / B5 / A5 / Any custom

44 Chapter 1 Theory of operation ENWW

Skew-feed prevention

Paper

The product can straighten the paper without slowing the feed operation. The operational sequence of skewfeed prevention is as follows:

1. The leading edge of paper strikes the registration shutter, and the leading edge aligns with the shutter.

2. As the feed rollers keep pushing the paper, the paper warps.

3. When the force is great enough, the registration shutter opens, and the paper passes through and

straightens.

Figure 1-32 Skew-feed prevention

Paper

Registration shutter

egistration shutter

Paper

aper

Registration shutter

egistration shutter

ENWW Pickup, feed, and delivery system 45

Paper-length detection

The DC controller determines the paper length by measuring the time between when the leading edge of the paper reaches the TOP sensor and when the trailing edge passes through.

The DC controller determines a paper size mismatch and notifies the formatter in one of the following conditions:

●

The detected paper size is different from the size designated by the formatter.

●

The detected paper size is different from the size detected by the Tray 2 media size switch (only when printing from Tray 2).

Paper-width detection

The DC controller determines the paper width by analyzing the combination of media width sensor readings.

The DC controller determines a paper size mismatch and notifies the formatter in one of the following conditions:

●

The detected paper size is different from the size designated by the formatter.

●

The detected paper size is different from the size detected by the Tray 2 media size switch (only when printing from Tray 2).

Table 1-14 Paper-width detection

Media width sensor 1 (PS106) Media width sensor 2 (PS108) Detection

ON ON Regular size

A4, Letter and Legal

OFF OFF Small size

Executive, B5 and A5

OFF ON Detected on right side

ON OFF Detected on left side

46 Chapter 1 Theory of operation ENWW

Fusing, reverse, and delivery block

user area

The fusing, reverse, and delivery block fuses the toner to the paper and delivers the printed page to the output bin.

Figure 1-33 Fusing, reverse, and delivery block

Reverse area

Switchback area

witchback area

Delivery area

Output bin

utput b

Fuser area

Image scanner

Fusing

The fuser applies heat and pressure to the paper to permanently bond the toner image to the paper.

ENWW Pickup, feed, and delivery system 47

Pressure roller pressurization and depressurization control

essu

ed>

S699

essure rolle

ease ca

use

user sleeve

Pressure roller pressurization and depressurization control is a feature to pressurize the pressure roller only when required for preventing a deformation of the roller and to facilitate clearing jams.

The product ships from the factory with the pressure roller released. The DC controller also releases the pressure roller when a jam is detected.

Figure 1-34 Pressure roller pressurization and depressurization control

DC controller

DC controll

Fuser motor

M299

Fuser pressure

Fuser pressur

release cam

r motor

PS699

Fuser pressure release sensor

Pressure roller

riz

Fuser sleeve

Depressurized

The operational sequence of the pressure roller pressurization and depressurization control is as follows:

1. The DC controller reverses the fuser motor.

2. The fuser pressure release cam rotates.

3. The pressure roller is pressurized or depressurized against the fuser sleeve, depending on the position

of the fuser pressure release cam.

NOTE: The DC controller determines a fuser pressure release mechanism failure and notifies the

formatter if the fuser pressure release sensor does not detect the depressurized condition within a specified period of time from when the fuser motor starts reverse rotation.

48 Chapter 1 Theory of operation ENWW

Reverse and delivery control

use

ediate switchback moto

ediate switchback rolle

After the toner is fused to the paper, the paper enters the reversing/delivery unit. The product can deliver the paper to the output bin either face-up or face-down, depending on instructions from the formatter.

Figure 1-35 Reverse and delivery control

Delivery roller

Output bin

utput b

Delivery motor

M106

Intermediate

Intermediat

delivery roller

delivery roll

PS112

PS11

Image scanner

Switchback roller

witchback roll

disengagement solenoid

disengagement soleno

SL106

PS110

PS11

M104

nterm

Intermediate switchback motor

Intermediate switchback roller

nterm

PS700

Fuser

Switchback roller disengagement arm

witchback roller disengagement arm

Switchback upper roller

witchback upper roll

PS111

Switchback area

witchback area

104

Switchback lower roller

witchback lower roll

M105

Switchback motor

witchback moto

Face-down paper path

Face-down p pt

Face-up paper path

Face-up p pt

PS110: Switchback sensor

PS111: Switchback jam sensor

PS112: Delivery sensor

PS700: Fuser output sensor

ENWW Pickup, feed, and delivery system 49

Face-down delivery

bac

To stack pages of a multiple-page print job in the correct order, the pages must be flipped over in the reversing unit before they are delivered face-down to the output bin.

Figure 1-36 Face-down delivery

Delivery roller

Delivery roll

Output bin

utput b

Image scanner

witchback roller disengagement arm

Switchback roller disengagement arm

Intermediate delivery roller

Intermediate delivery roll

Intermediate switchback roller

Intermediate switch

Fuser

k roll

Switchback area

witchback area

Switchback upper roller

witchback upper roll

Switchback lower roller

witchback lower roll

Face-down paper path

Face-down p pt

50 Chapter 1 Theory of operation ENWW

Face-up delivery

use

When the paper is delivered face-up, the face-up solenoid (SL105) activates the face-up deflector to prevent the paper from entering the reversing unit.

Figure 1-37 Face-up delivery

Delivery roller

Delivery roll

utput b

Output bin

Image scanner

ace-up flapper

Face-up flapper

Fuser

Face-up paper path

Face-up p pt

ENWW Pickup, feed, and delivery system 51

Output bin paper-full detection

p p

The DC controller detects whether the output bin is full by monitoring the output-bin media-full sensor.

Figure 1-38 Output bin paper-full detection

Printed

Printed paper

Output-bin media-full

utput-bin media-full

sensor lever

nsor lever

Output bin

utput b

DC controller

DC controll

Output-bin media-full sensor

PS104

Face-down paper path

Face-down p pt

Face-up paper path

Face-up

52 Chapter 1 Theory of operation ENWW

Duplex block

The duplex block reverses the paper in the duplex reverse area and feeds it through the duplex feed area to bring it to the simplex paper path.

Figure 1-39 Duplex block

Duplex reverse area

Duplex feed area

Image scanner

Simplex paper path

implex p pt

Duplex p pt

Duplex paper path

Duplex side registration adjustment operation

The product adjusts the side registration during a duplex print operation to align the center of the horizontal scanning direction on the second side with that of the print area on the photosensitive drum.

The side registration adjustment moves the side registration guide to the designated paper size.

The side registration guide moves to the following five positions, depending on the paper size, in order 1 to 5 and then back to 1:

1. Letter or Legal (home position)

2. A4

3. Executive

4. B5

5. A5

ENWW Pickup, feed, and delivery system 53

Figure 1-40 Duplex side registration adjustment operation

Duplex side registration guide

Duplex side registration

uide drive cam

guide drive cam

PS109

PS1

Duplex side registration sensor

uplex side registration sensor

CCW

uplex re-pickup moto

Duplex re-pickup motor

M107

107

The operational sequence of the side registration adjustment is as follows:

1. The DC controller reverses the duplex re-pickup motor (M107).

2. The side registration guide drive cam rotates and the duplex side registration sensor (PS109) detects

the home position of the duplex side registration guide.

3. The side registration guide moves, depending upon the paper size.

4. The DC controller stops the duplex re-pickup motor and completes the side registration guide

movement.

NOTE: The DC controller determines a duplex side registration guide failure and notifies the formatter

when the duplex side registration sensor does not detect the home position of the duplex side registration guide after the duplex side registration guide drive cam rotates twice.

54 Chapter 1 Theory of operation ENWW

Jam detection

NOTE: The product senses a jam condition when paper in the paper path does not trigger the required

sensor or sensors within a specific amount of time.

TIP: For information about individual sensor tests, see the manual sensor test and tray/bin sensor test

sections of the troubleshooting manual.

The product uses the following sensors to detect the presence of paper and to check whether paper is feeding correctly or has jammed:

●

Pre-feed sensor (PS102)

●

Top-of-page (TOP) sensor (PS103)

●

Media width sensor 1 (PS106)

●

Media width sensor 2 (PS108)

●

Reverse sensor (PS110)

●

Reverse jam sensor (PS111)

●

Paper-delivery sensor (PS112)

●

Duplex re-pickup sensor (PS113)

●

Fuser-delivery sensor (PS700)

●

Tray 3 media feed sensor (SR4) (for 1x500 sheet paper feeder, 1x500 sheet paper feeder with cabinet, and 2,500-sheet high-capacity paper feeder)

●

Tray 4 media feed sensor (SR8) (for 2,500-sheet high-capacity paper feeder)

●

Tray 5 media feed sensor (SR12) (for 2,500-sheet high-capacity paper feeder)

The DC controller checks for jams by timing the paper as it moves past these sensors. If the paper does not pass the sensor in a specific period of time, the DC controller stops the transport process (the motors are turned off and the rollers no longer rotate) and a jam message displays on the control panel.

ENWW Pickup, feed, and delivery system 55

Figure 1-41 Jam detection sensors

02PS113

03PS108

8R12

PS11

PS112

PS700

PS7

PS11

PS110

implex p pt

Simplex paper path

uplex p pt

Duplex paper path

PS111

PS113

PS106

PS1

PS108

PS102

PS1

PS103

SR4

Table 1-15 Jams that the product detects

Jam Description

SR8

SR12

Pickup delay jam One of the following conditions is true:

●

Tray 1, duplex accessory, or envelope feeder

56 Chapter 1 Theory of operation ENWW

Table 1-15 Jams that the product detects (continued)

Jam Description

◦

The TOP sensor does not detect the leading edge of the paper within a specified period of time after the pickup operation starts.

●

Tray 2

◦

The pre-feed sensor does not detect the leading edge of the paper within a specified period of time from when a pickup operation starts.

◦

The TOP sensor does not detect the leading edge of the paper within a specified period of time from when the pre-feed sensor detects the leading edge.

●

Trays 4 or 5

◦

The Tray 3 media-feed sensor does not detect the leading edge of the paper within a specified period from when the Tray 4 or 5 media-feed sensor detects the leading edge.

●

Trays 3, 4, or 5

◦

The Tray 3, 4, or 5 media feed sensor does not detect the leading edge of the paper within a specified period of time after the pickup operation starts.

◦

The TOP sensor does not detect the leading edge of paper within a specified period of time from when the media feed clutch is turned on.

NOTE: The product attempts to pick up the paper several times before determining that a jam

exists. The number of pickup attempts depends on the source (for example, four attempts occur if Tray 1 is the source).

Pickup stationary jam One of the following conditions is true:

●

The TOP sensor does not detect the trailing edge of the paper within a specified period of time from when it detects the leading edge.

●

Both media width sensors 1 and 2 do not detect the trailing edge of the paper within a specified period of time from when the TOP sensor detects the trailing edge.

●

Trays 4 or 5

◦

The Tray 3 media-feed sensor does not detect the trailing edge of paper within a specified period from when it detects the leading edge.

●

Trays 3, 4, or 5

◦

The Tray 3, 4, or 5 media feed sensor does not detect the trailing edge of the paper within a specified period of time from when it detects the leading edge.

Fuser delivery delay jam One of the following conditions is true:

●

The fuser delivery sensor does not detect the leading edge of the paper within a specified period of time after the TOP sensor detects the leading edge.

●

The reverse assembly jam sensor does not detect the leading edge of the paper within a specified period of time from when the fuser delivery sensor detects the leading edge.

●

For face-down delivery, the delivery sensor does not detect the leading edge of the paper within a specified period of time from when a paper reverse operation starts in the reverse area.

●

For face-up delivery, the delivery sensor does not detect the leading edge of the paper within a specified period of time from when the fuser delivery sensor detects the leading edge.

ENWW Pickup, feed, and delivery system 57

Table 1-15 Jams that the product detects (continued)

Jam Description

Fuser delivery stationary jam One of the following conditions is true:

●

The fuser delivery sensor does not detect the trailing edge of the paper within a specified period of time after the TOP sensor detects the trailing edge.

●

The reverse assembly jam sensor does not detect the trailing edge of the paper within a specified period of time from when the fuser delivery sensor detects the trailing edge.

●

For face-down delivery, the delivery sensor does not detect the trailing edge of the paper within a specified period of time from when a paper reverse operation starts in the reverse assembly area.

●

For face-up delivery, the delivery sensor does not detect the trailing edge of the paper within a specified period of time from when the fuser delivery sensor detects the leading edge.

Duplex re-pickup delay jam The duplex re-pickup sensor does not detect the leading edge of the paper within a specified period

of time from when a duplex reverse operation starts.

Wrapping jam After detecting the leading edge of the paper, the fuser delivery sensor detects the absence of

paper, and it has not yet detected the trailing edge.

Residual paper jam One of the following sensors detects paper presence when the product is turned on, when the door

is closed or when the product exits Sleep mode. The product automatically clears the residual paper.

●

TOP sensor

●

Media width sensor 1

●

Media width sensor 2

●

Fuser delivery sensor

●

Tray 3 media-feed sensor

●

Tray 4 media-feed sensor

●

Tray 5 media-feed sensor

Door open jam The product detects that a door is open while paper is moving through the product.

58 Chapter 1 Theory of operation ENWW

Optional paper feeders

p p

Three types of optional paper feeders are available for the product:

●

1x500-sheet paper feeder

●

1x500-sheet paper feeder with cabinet

●

2,500-sheet high-capacity paper feeder

The following figures show the product positioned on these paper feeders and the paper path associated with each one.

Figure 1-42 1x500-sheet paper feeder

Simplex paper path

implex

Duplex paper path

ENWW Optional paper feeders 59

Figure 1-43 1x500-sheet paper feeder with cabinet

p p

Simplex paper p

implex

Duplex paper path

Duplex

ath

60 Chapter 1 Theory of operation ENWW

Figure 1-44 2,500-sheet high-capacity paper feeder

Simplex paper path

implex p pt

uplex p pt

Duplex paper path

ENWW Optional paper feeders 61

Paper-feeder pickup and feed components

The following figures and tables show the signal flow in the paper feeder controller and the location of the motors, sensors, and solenoids located in the paper feeders.

1x500-sheet paper feeder signal flow and component locations

Figure 1-45 Signal flow for the 1x500-sheet paper feeder controller

Paper feeder controll

Paper feeder controller

DC controll

DC controller

+24V

+3.3V

eneratio

generation

circuit

+24V

Paper feeder

Motor

tor

oleno

Solenoid

Photointerrupter

witc

Switch

Figure 1-46 Pickup and feed components (1x500-sheet paper feeder)

M101

SR4

SL1

Pickup arm

ckup arm

SR2

SR3

SW2

SR1

Table 1-16 Pickup and feed components (1x500-sheet paper feeder)

Abbreviation Component Replacement part number

M101 Feed motor Feed motor assembly (RM2-5942-000CN)

M1 Paper feeder tray lifter motor Lifter assembly (RM1-5914-000CN)

62 Chapter 1 Theory of operation ENWW

Table 1-16 Pickup and feed components (1x500-sheet paper feeder) (continued)

Abbreviation Component Replacement part number

SL1 Paper feeder tray pickup solenoid Paper pickup assembly (RM2-0341-000CN)

SR1 Paper feeder tray media stack surface sensor 1 Paper feed roller assembly (RM1-8411-010CN)

SR2 Paper feeder tray media stack surface sensor 2 Paper feed roller assembly (RM1-8411-010CN)

SR3 Paper feeder tray media out sensor Paper pickup assembly (RM2-0341-000CN)

SR4 Paper feeder tray media feed sensor Paper pickup assembly (RM2-0341-000CN)

SW2 Paper feeder tray media size switch Part not available

1x500-sheet paper feeder with cabinet signal flow and component locations

Figure 1-47 Signal flow for the 1x500 paper feeder with cabinet controller

DC controll

DC controller

+24V

Paper feeder with cabinet controller

+3.3V

eneratio

generation

circuit

+24V

Paper feeder with cabine

Paper feeder with cabinet

Motor

tor

Solenoid

Photointerrupter

witc

Switch

ENWW Optional paper feeders 63

Figure 1-48 Pickup and feed components (1x500-sheet paper feeder with cabinet)

1R2

Pickup arm

Pickup ar

SR2

SR3

SW2

SR1

SL1

SR4

M101

Table 1-17 Pickup and feed components (1x500-sheet paper feeder with cabinet)

Abbreviation Component Replacement part number

M101 Feed motor Feed motor assembly (RM2-5942-000CN)

M1 Paper feeder with cabinet lifter motor Lifter assembly (RM1-5914-000CN)

SL1 Paper feeder with cabinet pickup solenoid Paper pickup assembly (RM2-0341-000CN)

SR1 Paper feeder with cabinet media stack surface

sensor 1

SR2 Paper feeder with cabinet media stack surface

sensor 2

SR3 Paper feeder with cabinet media out sensor Paper pickup assembly (RM2-0341-000CN)

SR4 Paper feeder with cabinet media feed sensor Paper pickup assembly (RM2-0341-000CN)

SW2 Paper feeder with cabinet media size switch Part not available

Paper feed roller assembly (RM1-8411-010CN)

64 Chapter 1 Theory of operation ENWW

2,500-sheet high-capacity paper feeder signal flow and component locations

2L3

8R12

SR6, SR7

9R10

Figure 1-49 Signal flow for the 2,500-sheet high-capacity paper feeder controller

2,500-sheet paper feeder

+24VA

24VA

DC controller HCI controller

DC controller

Figure 1-50 Pickup and feed components (2,500-sheet high-capacity paper feeder)

Lifting plate

Lifting plat

I controller

SR4

Motor

tor

olenoi

Solenoid

Photointerrupter

witc

Switch

M101

Tray 3

Tray 4

Tray 5

SW2

SW3

SW4

Wire

Wir

SR1, SR2, SR3

Lifter

SR5, SR6, SR7

Lifter

Pulley

Pulle

SL1

SL2

SL3

SR9

SR10 SR11

SR8

SR12

Tray

Tra

ENWW Optional paper feeders 65

Table 1-18 Pickup and feed components (2,500-sheet high-capacity paper feeder)

Abbreviation Component name Replacement part number

M101 Feed motor Feed motor assembly (RM2-5942-000CN)

M1 Tray 3 lifter motor Lifter assembly (RM1-5914-000CN)

M3 Tray 4 lifter motor Lifter assembly (RM1-5914-000CN)

M4 Tray 5 lifter motor Lifter drive assembly (RM2-0346-000CN)

SL1 Tray 3 pickup solenoid Paper pickup assembly (RM2-0341-000CN)

SL2 Tray 4 pickup solenoid Lifter assembly (RM1-5914-000CN)

SL3 Tray 5 pickup solenoid Lifter assembly (RM1-5914-000CN)

SW1 Right door open detection switch Part not available

SW2 Tray 3 media-size switch Lifter base assembly (RM1-5913-000CN)

SW3 Tray 4 media-size switch Lifter base assembly (RM1-5913-000CN)

SW4 Tray 5 media-size switch Tray size sensor assembly (RM2-0350-000CN)

SR1 Tray 3 media-surface sensor 1 Paper pickup assembly (RM2-0341-000CN)

SR2 Tray 3 media-surface sensor 2 Paper pickup assembly (RM2-0341-000CN)

SR3 Tray 3 media-presence sensor Paper pickup assembly (RM2-0341-000CN)

SR4 Tray 3 media-feed sensor Paper pickup assembly (RM2-0341-000CN)

SR5 Tray 4 media-surface sensor 1 Paper pickup assembly (RM2-0341-000CN)

SR6 Tray 4 media-surface sensor 2 Paper pickup assembly (RM2-0341-000CN)

SR7 Tray 4 media-presence sensor Paper pickup assembly (RM2-0341-000CN)

SR8 Tray 4 media-feed sensor Paper pickup assembly (RM2-0341-000CN)

SR9 Tray 5 media-surface sensor 1 Paper pickup assembly (RM2-0341-000CN)

SR10 Tray 5 media-surface sensor 2 Paper pickup assembly (RM2-0341-000CN)

SR11 Tray 5 media-presence sensor Paper pickup assembly (RM2-0341-000CN)

SR12 Tray 5 media-feed sensor Paper pickup assembly (RM2-0341-000CN)

66 Chapter 1 Theory of operation ENWW

Paper-size detection and tray-presence detection

The paper feeder controller in both the 1 x 500-sheet paper feeder and 1x500-sheet paper feeder with cabinet detects the size of paper loaded in Tray 3 and the presence of Tray 3 using the media size switch. Each media-size switch contains three sub-switches. The paper feeder controller detects the size of paper and the presence of the tray according to the combination of the sub-switches and notifies the formatter through the DC controller.

Table 1-19 Paper-size detection and tray-presence detection (1 x 500-sheet paper feeder and 1x500-sheet paper

feeder with cabinet)

Tray presence or media size Top switch Center switch Bottom switch

A4 On Off Off

Letter Off On Off

B5 Off On On

A5 Off Off On

Executive On Off On

LegalOnOnOff

Custom size On On On

No tray Off Off Off

The HCI controller detects the size of the paper loaded in the trays and the presence of the trays in the 2,500sheet high-capacity paper feeder by monitoring the media-size switches. Each media-size switch contains three sub-switches. The HCI controller detects the size of paper and the presence of the tray according to the combination of the sub-switches and notifies the formatter through the DC controller. During Sleep mode, the HCI controller only detects the presence of the tray.

Table 1-20 Paper-size detection and tray-presence detection (2,500-sheet high-capacity paper feeder)

Paper size Paper-size switch SW2, SW3 (Trays 3 and 4) Paper-size switch SW4 (Tray 5)

Top Center Bottom Top Center Bottom

No tray Off Off Off Off Off Off

A5 On On Off N/A N/A N/A

B5 OffOnOnN/AN/AN/A

Executive On Off On N/A N/A N/A

Letter Off On Off Off On On

A4 On Off Off On Off On

Legal OnOnOffOffOffOn

Custom size On On On Any combination of switches not shown above

ENWW Optional paper feeders 67

Paper feeder tray lift operation

sensor

The paper feeders keep the paper stack surface at the correct pickup position. The tray lift operation occurs under the following conditions:

The paper feeder controller detects the position of the stack surface by monitoring the paper feeder media stack surface sensors under the following conditions:

●

When the product is turned on

●

When a tray is inserted

●

When the paper stack surface in the tray lowers

Trays 3 and 4 lift operation

The sequence of the paper feeder lift operation for Trays 3 and 4 is as follows:

1. The paper feeder controller rotates the tray lifter motor.

2. The lifter moves up.

3. The tray lifter motor stops when the tray media stack surface sensor 2 detects the paper stack surface.

4. The tray lifter motor rotates again when the tray media stack surface sensor 1 detects that the paper

stack surface lowers.

NOTE: The paper feeder controller determines a tray lifter motor failure and notifies the formatter

through the DC controller if the tray media stack surface sensor 1 or sensor 2 does not detect the paper stack surface within a specified period of time after the tray lifter motor starts rotating.

Figure 1-51 Trays 3 and 4 paper feeder lift operation

DC controller

DC controll

Tray lifter motor

Tray media stack surface sensor lever

Lifting plate

Liing plat

Tray media

stack surface sensor 2

Tray media

stack surface sensor 1

Tray media

presence sensor

Tray media presence sensor lever

Lifter

68 Chapter 1 Theory of operation ENWW

Tray 5 lift operation

sensor

ace senso

The sequence of the paper feeder lift operation for Tray 5 is as follows:

1. The paper feeder controller rotates the tray lifter motor.

2. The lifter motor activates the pulley, which coils the wire connected to the lift plate, and raises the lift

plate.

3. The tray lifter motor stops when the tray media stack surface sensor 2 detects the paper stack surface.

4. The tray lifter motor rotates again when the tray media stack surface sensor 1 detects that the paper

stack surface lowers.

NOTE: The paper feeder controller determines a tray lifter motor failure and notifies the formatter

through the DC controller if the tray media stack surface sensor 1 or sensor 2 does not detect the paper stack surface within a specified period of time after the tray lifter motor starts rotating.

Figure 1-52 Tray 5 paper feeder lift operation

Tray lifter motor

DC controller

Tray media

stack surface sensor 1

k surf

Tray media stack surface sensor lever

Tray media

stack surface sensor 2

k surf

r 1

Tray media

presence sensor

Liting plate

ting plat

Wire

Wir

Pulley

Pulle

Tray media presence

Tray media presenc

sensor lever

nsor lever

ENWW Optional paper feeders 69

Paper feeder jam detection

The following figures show the location of paper presence sensors in the paper feeders that detect the presence of paper and determine whether the paper is being fed correctly or has jammed. The 1x500-sheet paper feeder and 1x500-sheet paper feeder with cabinet use the Tray 3 paper presence sensor (SR4). The 2,500-sheet high-capacity paper feeder uses the following sensors

●

Tray 3 media-feed sensor (SR4)

●

Tray 4 media-feed sensor (SR8)

●

Tray 5 media-feed sensor (SR12)

Table 1-15 Jams that the product detects on page 56 for descriptions of jams detected by these sensors.

See

Figure 1-53 1x500-sheet paper feeder media feed sensor

SR4

70 Chapter 1 Theory of operation ENWW

Figure 1-54 1x500-sheet paper feeder with cabinet media feed sensor

SR4

ENWW Optional paper feeders 71

Figure 1-55 2,500-sheet high-capacity paper feeder media feed sensors

SR4

SR8

SR12

72 Chapter 1 Theory of operation ENWW

Scanning/image capture system

NOTE: Figures in this section might look slightly different from your product, but they are correct for the

M630. All the information provided in this section is correct for this product.

Scanner

The scanner is a carriage-type platen scanner which includes the frame, glass, scan module, and a scanner control board (SCB). The scanner has a sensor to detect legal-sized media and a switch to indicate when the document feeder is opened.

The document feeder and control panel are attached to the scanner. If the scanner fails, it can be replaced as a whole unit. The scanner replacement part does not include the document feeder, control panel, or SCB.

Document feed system

This section describes the following:

●

Sensors in the document feeder

●

Document feeder paper path

●

Simplex single-pass scanning

●

Electronic duplexing (e-duplex) single-pass scanning

●

Front-side and back-side background selector

●

Deskew operation

●

Document feeder hinges

The product supports single-pass electronic duplexing (e-duplex) copy jobs. Two separate scan modules scan the front-side and back-side of an e-duplex copy job page in a single pass through the document feeder.

For specific copy jobs, a background selector changes the reflective platen from a white strip to a black strip for page edge-to-edge recognition.

Sensors in the document feeder

The document feeder contains the following sensors:

●

ADF paper present sensor: Detects whether a document is present in the document feeder. If paper is present in the document feeder when copies are made, the product scans the document using the document feeder. If no paper is present when copies are made, the product scans the document using the scanner glass.

●

ADF Y (length) sensor: Detects whether a legal-size original is present in the document feeder.

●

ADF jam cover sensor: Detects whether the document feeder cover is open or closed.

●

ADF paper path deskew sensor: Detects the top of the page as it enters the deskew rollers.

●

ADF paper path pick success sensor: Detects a successful one page feed from the document feeder tray.

NOTE: This sensor uses ultrasonic sound to detect a mutli-page paper feed.

ENWW Scanning/image capture system 73

●

Paper path sensor 1: Detects the top of the page as it approaches the front-side scan module (document feeder glass).

●

Paper path sensor 2: Detects the top of the page as it approaches the back-side scan module during eduplex copy jobs.

Figure 1-56 Document feeder sensors

Table 1-21 Document feeder sensors

Item Description

1 ADF Y (length) sensor

2 ADF paper present sensor

3 ADF paper path pick success sensor

2 1

4 Paper path sensor 1

NOTE: For an e-duplex copy job, this sensor is used to activate the front-side scan module (in the scanner

base) and the front-side background selector (in the document feeder), if needed.

5 ADF paper path deskew sensor

6 Paper path sensor 2

NOTE: For an e-duplex copy job, this sensor is used to activate the back-side scan module and the back-side

background selector, if needed. These components are in the document feeder.

7 ADF jam cover sensor (open the jam access cover and insert a folded piece of paper to activate the flag)

74 Chapter 1 Theory of operation ENWW

Document feeder paper path

Figure 1-57 Document feeder paper path

5 4 3

Table 1-22 Document feeder paper path

Item Description Item Description

1 Input tray 7 Front-side background selector

2 Separation pad 8 Front-side scan module

1210

3 Pick roller 9 Postscan drive roller

4 Feed roller 10 Back-side scan module

5 Deskew drive roller 11 Back-side background selector

6 Prescan drive roller 12 Exit drive roller

Document feeder simplex operation

Following is the basic sequence of operation for a document feeder simplex job.

1. The ADF jam cover sensor detects when the cover door is in the closed position.

2. The ADF paper present sensor activates when paper is loaded onto the input tray.

3. The pick motor rotates to lower the pick roller and starts to pick the loaded paper.

4. The ADF multi-pick (ultrasonic) sensor activates when the leading edge of the media is driven past the

sensor. The product firmware registers a successful pick operation.

5. The ADF paper path deskew activates when the leading edge of the paper passes it. The product

firmware registers the leading edge of the paper position.

NOTE: This scan module (document feeder

glass) is located in the scanner base.

ENWW Scanning/image capture system 75

6. The leading edge of the paper drives into the nip point of the deskew drive roller and the deskew pinch

rollers. This creates a buckle of paper by the nip point for pick-skew correction.

7. The deskew motor rotates the deskew drive roller to pull the paper into the prescan drive roller.

8. The pick motor stops turning and allows both the pick and feed roller to turn freely while the paper is

pulled in by the deskew drive roller.

9. The feed motor rotates to drive the paper into the prescan front-side sensor. The firmware registers the

leading edge position of the paper as the multi-pick sensor activates.

NOTE: If the copy job requires a reflective platen change, the front-side background selector

activates.

10. The feed motor continues to rotate and drive the leading edge of the paper through the preset distance

from the multi-pick sensor to the front-side scan zone. The scanner begins the scanning and data retrieval process.

11. The ADF multi-pick (ultrasonic) sensor deactivates when the trailing edge of the paper passes the

sensor. The firmware registers the trailing edge of the paper position.

12. The feed motor continues to rotate and drive the trailing edge of the paper through the preset distance

from the ADF multi-pick (ultrasonic) sensor to the front-side scan zone. The scanner ends the scanning and data retrieval process.

13. The feed motor continues to rotate and ejects the trailing edge of the paper into the output bin.

14. One of the following occurs:

●

If the copy job is complete, the ADF paper present sensor deactivates. The feed motor reverses rotation to raise the pick roller.

●

If the copy job is not complete, the ADF paper present sensor is active. The product firmware detects additional pages in the input tray and the process repeats.

Document feeder e-duplex operation

Following is the basic sequence of operation for an e-duplex job.

NOTE: For an e-duplex copy job, the background scan operation begins immediately after the simplex

sequence of operation ends.

1. The feed motor continues to drive the paper until the leading edge activates the prescan back-side

sensor. The product firmware registers the position of the leading edge of the paper.

NOTE: If the copy job requires a reflective platen change, the back-side background selector activates.

2. The feed motor continues to rotate to drive the leading edge of the paper through the preset distance

from prescan back-side sensor to the back-side background selector scan zone. The back-side background scan module begins scanning and retrieval of the data.

3. The prescan back-side sensor deactivates when the trailing edge of the paper passes it. The product

firmware registers the trailing edge of the paper position.

4. The feed motor continues to rotate to drive the trailing edge of the paper edge past the back-side

background selector scan zone.

76 Chapter 1 Theory of operation ENWW

Hp M630Z, M630H, M630F, M630DN User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

1 Theory of operation

Basic operation

Sequence of operation (product)

Sequence of operation (scanner)

Formatter-control system

Formatter hardware

Sleep mode

Input/output (I/O)

Memory

Random access memory (RAM)

Firmware

Nonvolatile random access memory (NVRAM)

Image Resolution Enhancement technology

HP Memory Enhancement technology

Printer job language (PJL)

Printer management language (PML)

Control panel

Scanner interface

Engine-control system

DC controller

Motors

Fans

High-voltage power supply

Low-voltage power supply

Overcurrent/overvoltage protection

Voltage detection

Safety

Sleep (power save) mode

Low-voltage power supply functions

Fuser control

Fuser temperature control

Fuser sleeve temperature protection

Fuser failure detection

Pressure roller cleaning

Ambient-temperature detection

Laser/scanner system

Laser/scanner failure

Safety

Image-formation system

Electrophotographic process

Step 1: Primary charge (conditioning)

Step 2: Laser-beam exposure (writing)

Step 3: Developing

Step 4: Transfer

Step 5: Separation

Step 6: Fusing

Step 7: Drum cleaning

Toner cartridge

Memory chip

Cartridge presence and life detection

Pickup, feed, and delivery system

Pickup-and-feed block

Tray 2 pickup

Tray 2 paper-size detection and tray-present detection

Tray 2 lift operation

Tray 2 paper-presence detection

Tray 2 multiple-feed prevention

Tray 1 pickup

Tray 1 paper-presence detection

Feed speed control

Skew-feed prevention

Paper-length detection

Paper-width detection

Fusing, reverse, and delivery block

Fusing

Pressure roller pressurization and depressurization control

Reverse and delivery control

Face-down delivery

Face-up delivery

Output bin paper-full detection

Duplex block

Duplex side registration adjustment operation

Jam detection

Optional paper feeders

Paper-feeder pickup and feed components

1x500-sheet paper feeder signal flow and component locations