HP m101, m106, m129, m134 Troubleshooting Manual

LaserJet Pro M101-M106 LaserJet Pro MFP M129-M134

www.hp.com/support/ljM101 www.hp.com/support/ljM129MFP

Troubleshooting Manual

For printer part removal and part number information, see the Repair Manual.

M101-M106

M129-M134

HP LaserJet Pro M101, M106 and LaserJet Pro MFP M129, M134

Troubleshooting Manual

Trademark Credits

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

The information contained herein is subject to change without notice.

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

Edition 1, 10/2016

Microsoft®, Windows®, Windows® XP, and Windows Vista® are U.S. registered trademarks of Microsoft Corporation.

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 printer error conditions.

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

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

extensive damage to the printer.

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iv Conventions used in this guide ENWW

For additional service and support information

HP service personnel, go to the Service Access Work Bench (SAW) at http://h41302.www4.hp.com/km/saw/

home.do.

Channel partners, go to HP Channel Services Network (CNS) at https://h30125.www3.hp.com/hpcsn.

At these locations, find information on the following topics:

●

Install and configure

●

Printer specifications

●

Up-to-date control panel message (CPMD) troubleshooting

●

Solutions for printer issues and emerging issues

●

Remove and replace part instructions and videos

●

Service advisories

●

Warranty and regulatory information

Channel partners, access training materials in the HP University and Partner Learning Center at

https://content.ext.hp.com/sites/LMS/HPU.page.

To access HP PartSurfer information from any mobile device, go to http://partsurfermobile.hp.com/ or scan the Quick Response (QR) code below.

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vi For additional service and support information ENWW

Table of contents

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

Related documentation and software .................................................................................................................. 2

Basic operation ...................................................................................................................................................... 3

Sequence of operation ........................................................................................................................ 4

Formatter-control system ..................................................................................................................................... 5

Sleep delay .......................................................................................................................................... 5

Printer job language (PJL) ................................................................................................................... 5

Printer management language (PML) ................................................................................................. 6

Control panel ....................................................................................................................................... 6

Wireless ............................................................................................................................................... 6

Low end data model (LEDM) overview ................................................................................................ 6

Advanced control language (ACL) overview ....................................................................................... 6

CPU ....................................................................................................................................................... 6

Input/output (I/O) ................................................................................................................................ 6

USB .................................................................................................................................... 6

USB hosts .......................................................................................................................... 6

10/100 networking ........................................................................................................... 6

Fax ..................................................................................................................................... 7

Memory ............................................................................................................................. 7

Firmware ......................................................................................................... 7

Nonvolatile random access memory (NVRAM) .............................................. 7

Flash memory ................................................................................................. 7

Random access memory ................................................................................ 7

HP Memory Enhancement technology (MEt) ................................................. 7

Engine-control system .......................................................................................................................................... 8

DC controller ........................................................................................................................................ 9

Motor control .................................................................................................................. 11

Low-voltage power supply ............................................................................................................... 12

Overcurrent/overvoltage protection .............................................................................. 14

Low-voltage power supply failure detection .............................................. 14

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

High-voltage power supply circuits ............................................................................... 15

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Fuser control ..................................................................................................................................... 15

Fuser control functions ................................................................................................... 17

Fuser heater protection .................................................................................................. 18

Engine laser scanner system ............................................................................................................................... 19

Laser scanner failure detection ........................................................................................................ 20

Safety ................................................................................................................................................ 20

Image-formation process ................................................................................................................. 21

Step 1: Pre-exposure ...................................................................................................... 24

Step 2: Primary charging ................................................................................................ 25

Step 3: Laser-beam exposure ........................................................................................ 26

Step 4: Development ...................................................................................................... 26

Step 5: Transfer .............................................................................................................. 27

Step 6: Separation .......................................................................................................... 28

Step 7: Fusing .................................................................................................................. 28

Step 8: Drum cleaning ..................................................................................................... 29

Toner cartridges ................................................................................................................................ 29

Design ............................................................................................................................. 29

Engine pickup, feed, and delivery system ........................................................................................................... 32

Sensors and switches ........................................................................................................................ 34

Motors and solenoids ........................................................................................................................ 35

Jam detection/prevention ................................................................................................................ 35

Scanning and image capture system (MFP printers) .......................................................................................... 38

Motor and sensors ............................................................................................................................. 40

Document feeder system (MFP printers) ............................................................................................................ 41

Document feeder simplex operation ................................................................................................ 41

Fax functions and operation (fax models only) .................................................................................................. 42

Computer and network security features ........................................................................................ 42

PSTN operation ................................................................................................................................. 42

Receive faxes when you hear fax tones ........................................................................................... 42

Distinctive ring function .................................................................................................................... 43

Set up the distinctive ring function ................................................................................ 43

Fax by using voice over IP (VOIP) services ........................................................................................ 43

The fax subsystem ............................................................................................................................ 44

Fax card in the fax subsystem .......................................................................................................... 44

Safety isolation ............................................................................................................... 44

Safety-protection circuitry ............................................................................................. 44

Data path ......................................................................................................................... 44

Hook state ....................................................................................................................... 45

Downstream device detection ........................................................................................ 45

Hook switch control ........................................................................................................ 45

Ring detect ...................................................................................................................... 45

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Line current control ........................................................................................................ 45

Billing or metering tone filters ....................................................................................... 46

Fax page storage in flash memory ................................................................................................... 46

Stored fax pages ............................................................................................................. 46

Advantages of flash memory storage ............................................................................ 46

2 Solve problems ........................................................................................................................................... 47

For additional service and support ..................................................................................................................... 48

Troubleshooting process .................................................................................................................................... 49

Determine the problem source ......................................................................................................... 49

Pre-troubleshooting checklist ........................................................................................ 49

Troubleshooting flowchart ............................................................................................. 50

Power subsystem .............................................................................................................................. 51

Power-on checks ............................................................................................................ 51

Control panel checks ......................................................................................................................... 51

Tools for troubleshooting ................................................................................................................................... 53

Individual component diagnostics .................................................................................................... 53

Tools for troubleshooting: LED diagnostics ................................................................... 53

Network LEDs (network models) ................................................................. 53

Control-panel LEDs ...................................................................................... 53

Change the link speed setting (network models) ........................................ 54

Tools for troubleshooting: Engine diagnostics .............................................................. 54

Engine test .................................................................................................... 54

Drum rotation test check ............................................................................. 55

Diagrams ........................................................................................................................................... 56

Diagrams: Block diagrams .............................................................................................. 56

Sensors and switches (image formation system; printer base) .................. 56

Cross section diagrams ................................................................................ 58

Diagrams: Printed circuit assembly (PCA) connector locations ..................................... 61

Engine controller PCA ................................................................................... 61

Formatter PCA .............................................................................................. 62

Diagrams: External plug and port locations .................................................................. 64

Diagrams: Locations of major components ................................................................... 66

Major components (printer base) ................................................................. 66

Diagrams: Timing chart .................................................................................................. 68

Diagrams: Circuit diagrams ............................................................................................ 69

Use advanced configuration with HP Embedded Web Server (EWS) and HP Device Toolbox

(Windows) .......................................................................................................................................... 70

Internal test and information pages ................................................................................................. 73

Print the configuration report ........................................................................................ 73

Print a configuration report from an LED control panel .............................. 74

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Print the configuration report from a 2-line control panel ......................... 74

Print the configuration report from a touchscreen control panel .............. 74

Finding important information on the configuration report ....................... 74

Control panel menus ......................................................................................................................... 76

Setup menu ..................................................................................................................... 76

HP Web Services menu ................................................................................. 76

Reports menu ............................................................................................... 77

Self Diagnostics menu .................................................................................. 79

Fax Setup menu (fax models) ...................................................................... 79

System Setup menu ..................................................................................... 82

Network Setup menu .................................................................................... 85

Quick Forms menu ........................................................................................ 86

Function specific menus ................................................................................................. 87

Fax Menu (fax models) ................................................................................. 87

Copy menu (MFP models) ............................................................................. 89

Scan menu (MFP models) ............................................................................. 90

Apps .............................................................................................................. 90

Supplies ........................................................................................................ 90

Control panel message document (CPMD) ....................................................................................... 91

Control-panel message types ........................................................................................ 91

Control-panel messages and event log entries ............................................................. 91

Control Panel Error Messages (M102w, M104a/w, M106w models) .......... 92

Control Panel Error Messages (M130a, M132a, M133a, M134a models) ... 97

Control Panel Error Messages (M130nw/fn/fw,

M132nw/snw/fn/fp/fw, M133fn, M134fn models) ................................... 111

Improve print quality ......................................................................................................................................... 127

Print from a different software program ....................................................................................... 127

Check the paper-type setting for the print job ............................................................................... 127

Check the paper type setting (Windows) ..................................................................... 128

Check the paper type setting (OS X) ............................................................................. 128

Check toner-cartridge status (M101/M106) .................................................................................. 128

Check toner-cartridge status (M129/M134) .................................................................................. 128

Clean the printer (M101/M106) ...................................................................................................... 130

Print a cleaning page .................................................................................................... 130

Clean the printer (M129/M134) ...................................................................................................... 130

Print a cleaning page .................................................................................................... 130

Visually inspect the toner cartridge and imaging drum ................................................................. 131

Check paper and the printing environment .................................................................................... 131

Step one: Use paper that meets HP specifications ...................................................... 131

Step two: Check the environment ................................................................................ 132

Check paper and the printing environment .................................................................................... 132

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Step one: Use paper that meets HP specifications ...................................................... 132

Step two: Check the environment ................................................................................ 132

Check other print job settings ......................................................................................................... 133

Check the EconoMode settings .................................................................................... 133

Use the HP Embedded Web Server (EWS) to improve print quality ............................................... 133

Print quality troubleshooting guide ............................................................................................... 135

Image defects table ...................................................................................................... 135

Product specific image defects .................................................................................... 142

Repetitive image defect ruler .................................................................... 142

Print quality troubleshooting guide .......................................................... 146

Improve copy and scan image quality (M129/M134) ....................................................................................... 155

Introduction ..................................................................................................................................... 155

Check the scanner glass for dirt and smudges ............................................................................... 155

Check the paper settings ................................................................................................................ 155

Optimize for text or pictures .......................................................................................................... 157

Edge-to-edge copying .................................................................................................................... 158

Clean the printer ................................................................................................................................................ 159

Print a cleaning page (M101/M106) ............................................................................................... 159

Print a cleaning page (M129/M134) ............................................................................................... 159

Clean the pickup roller and separation pad .................................................................................... 160

Clean the pickup rollers and separation pad in the document feeder ........................................... 161

Check the scanner glass and white backing for dirt or smudges ................................................... 162

Clean the ADF replaceable film assembly ...................................................................................... 163

Clean the touchscreen .................................................................................................................... 165

Solve paper-handling problems ....................................................................................................................... 166

Printer feeds incorrect page size .................................................................................................... 166

Printer pulls from incorrect tray ..................................................................................................... 166

Printer will not duplex or duplexes incorrectly .............................................................................. 166

Paper does not feed from the input tray ........................................................................................ 166

Output is curled or wrinkled ........................................................................................................... 167

Printer does not pick up paper or misfeeds ................................................................................... 167

The printer does not pick up paper .............................................................................. 167

The printer picks up multiple sheets of paper ............................................................. 168

The document feeder jams, skews, or picks up multiple sheets of paper (MFP

models) ......................................................................................................................... 168

Paper does not feed automatically .............................................................................. 168

Clear paper jams (M101/M106) ...................................................................................................... 170

Introduction .................................................................................................................. 170

Paper path jam sensor locations (M101/M106) .......................................................... 170

Paper jam locations ...................................................................................................... 171

Experiencing frequent or recurring paper jams? ......................................................... 172

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Clear paper jams in the input tray ................................................................................ 173

Clear paper jams in the toner-cartridge area .............................................................. 176

Clear paper jams in the output bin ............................................................................... 177

Clear paper jams (M129/M134) ...................................................................................................... 180

Introduction .................................................................................................................. 180

Paper path jam sensor locations (M129/M134) .......................................................... 181

Paper jam locations ...................................................................................................... 182

Experiencing frequent or recurring paper jams? ......................................................... 183

Clear paper jams in the input tray ................................................................................ 185

Clear paper jams in the toner-cartridge area .............................................................. 188

Clear paper jams in the output bin ............................................................................... 190

Clear paper jams in the document feeder (document feeder models only) ............... 193

Solve performance problems ............................................................................................................................ 196

Solve connectivity problems ............................................................................................................................. 197

Solve USB connection problems ..................................................................................................... 197

Solve wired network problems ....................................................................................................... 197

Introduction .................................................................................................................. 197

Poor physical connection ............................................................................................. 197

The computer is using the incorrect IP address for the printer ................................... 197

The computer is unable to communicate with the printer .......................................... 198

The printer is using incorrect link speed settings for the network ............................. 198

New software programs might be causing compatibility problems ........................... 198

The computer or workstation might be set up incorrectly .......................................... 198

The printer is disabled, or other network settings are incorrect ................................ 198

Service mode functions ..................................................................................................................................... 199

Service menu (M129/M134) ............................................................................................................ 199

Secondary service menu ................................................................................................................. 200

Printer resets .................................................................................................................................. 202

Restore the factory-set defaults ................................................................................. 202

NVRAM initialization ..................................................................................................... 202

Super NVRAM initialization ........................................................................................... 203

Solve fax problems (fax models only) .............................................................................................................. 205

Checklist for solving fax problems ................................................................................................. 205

Perform a fax diagnostic test ......................................................................................................... 206

Solve general fax problems ............................................................................................................ 206

Faxes are sending slowly ............................................................................................. 206

Print quality of a photo is poor or prints as a gray box. .............................................. 207

Fax quality is poor ........................................................................................................ 207

You touched the Cancel button to cancel a fax, but the fax was still sent ............. 208

No fax address book button displays ........................................................................... 208

Not able to locate the fax settings in HP Web Jetadmin ............................................. 208

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

enabled ......................................................................................................................... 208

A mix of names and numbers is in the recipients box ................................................. 208

A one-page fax prints as two pages ............................................................................. 208

A document stops in the document feeder in the middle of faxing ............................ 209

The volume for sounds coming from the fax accessory is too high or too low .......... 209

Use fax over VoIP networks .......................................................................................... 209

Solve problems receiving faxes ...................................................................................................... 209

Solve problems sending faxes ........................................................................................................ 214

Fax error messages on the control panel ....................................................................................... 215

The No Fax Detected message displays ....................................................................... 215

The Communication error message appears ............................................................... 215

No Dial Tone .................................................................................................................. 216

The Fax is busy message appears ................................................................................ 217

The No fax answer message appears .......................................................................... 217

Document feeder paper jam ......................................................................................... 218

The Fax storage is full message appears ..................................................................... 218

Scanner error ................................................................................................................ 218

The control panel displays a Ready message with no attempt to send the fax ......... 218

The control panel displays the message "Storing page 1" and does not progress

beyond that message ................................................................................................... 218

Faxes can be received, but not sent ............................................................................. 219

Printer is password protected ...................................................................................... 219

Unable to use fax functions from the control panel .................................................... 219

Unable to use speed dials ............................................................................................. 219

Unable to use group dials ............................................................................................. 220

Receive a recorded error message from the phone company when trying to send

a fax .............................................................................................................................. 220

Unable to send a fax when a phone is connected to the printer ................................. 221

Troubleshoot fax codes and trace reports ..................................................................................... 221

View and interpret fax error codes ............................................................................... 221

Fax trace report ............................................................................................................ 222

Fax logs and reports ....................................................................................................................... 222

Print all fax reports ....................................................................................................... 222

Print individual fax reports ........................................................................................... 222

Set the fax error report ................................................................................................ 223

Set the fax-error-correction mode ................................................................................................. 223

Change the fax speed ...................................................................................................................... 223

Use fax on a DSL, PBX, or ISDN system .......................................................................................... 224

DSL ................................................................................................................................ 224

PBX ................................................................................................................................ 224

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ISDN ............................................................................................................................... 224

Solve email problems (M129/M134) ................................................................................................................. 225

Cannot connect to the email server ................................................................................................ 225

Validate the SMTP gateway (Windows) .......................................................................................... 225

Validate the LDAP gateway (Windows) .......................................................................................... 225

Update the firmware ......................................................................................................................................... 226

Method one: Update the firmware using the control panel ........................................................... 226

Method two: Update the firmware using the Firmware Update Utility ......................................... 227

Appendix A Printer specifications .................................................................................................................. 229

Printer dimensions (M101/M106) ..................................................................................................................... 230

Printer dimensions (M129/M134) ..................................................................................................................... 231

Printer space requirements .............................................................................................................................. 232

Power consumption, electrical specifications, and acoustic emissions .......................................................... 232

Operating-environment range (M101/M106) ................................................................................................... 232

Operating-environment range (M129/M134) ................................................................................................... 232

Certificates of volatility ..................................................................................................................................... 233

Index ........................................................................................................................................................... 239

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List of tables

Table 1-1 Sequence of operation ......................................................................................................................................... 4

Table 1-2 Motors ................................................................................................................................................................ 11

Table 1-3 List of DC voltages .............................................................................................................................................. 13

Table 1-4 Fuser components ............................................................................................................................................. 16

Table 1-5 Fuser control functions ...................................................................................................................................... 17

Table 1-6 Sensors ............................................................................................................................................................... 23

Table 1-7 Image formation process ................................................................................................................................... 24

Table 1-8 Toner cartridge functions .................................................................................................................................. 30

Table 1-9 Pickup, feed, and delivery system functions ..................................................................................................... 32

Table 1-10 Photo sensors and switches ............................................................................................................................ 34

Table 1-11 Motors and solenoids ....................................................................................................................................... 35

Table 1-12 Jams that the printer detects .......................................................................................................................... 36

Table 1-13 Motor and sensors ........................................................................................................................................... 40

Table 2-1 Troubleshooting flowchart ................................................................................................................................ 50

Table 2-2 Sensors and switches (image formation system; printer base) ....................................................................... 56

Table 2-3 Sensors (pickup, feed, and delivery system; printer base) ............................................................................... 57

Table 2-4 Service parts (cross section; printer base) ........................................................................................................ 58

Table 2-5 Motor (cross section; printer base) .................................................................................................................... 60

Table 2-6 Engine controller PCA connectors ..................................................................................................................... 61

Table 2-7 Formatter PCA (M101/M106) ............................................................................................................................. 62

Table 2-8 Formatter PCA (M129/M134) ............................................................................................................................. 63

Table 2-9 External plug and port locations (M101/M106) ................................................................................................ 64

Table 2-10 External plug and port locations (M126/M134) .............................................................................................. 65

Table 2-11 Main assemblies ............................................................................................................................................... 66

Table 2-12 Main parts (printer base) ................................................................................................................................. 67

Table 2-13 PCAs (printer base) ........................................................................................................................................... 67

Table 2-14 HP Embedded Web Server (EWS) and HP Device Toolbox (Windows) ............................................................ 72

Table 2-15 Sample configuration report ........................................................................................................................... 75

Table 2-16 HP Web Services menu ..................................................................................................................................... 76

Table 2-17 Reports menu ................................................................................................................................................... 77

Table 2-18 Self Diagnostics menu ..................................................................................................................................... 79

Table 2-19 Fax Setup menu ............................................................................................................................................... 79

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Table 2-20 System Setup menu ......................................................................................................................................... 82

Table 2-21 Network Setup menu ....................................................................................................................................... 85

Table 2-22 Quick Forms menu ........................................................................................................................................... 86

Table 2-23 Fax Menu .......................................................................................................................................................... 87

Table 2-24 Copy menu ........................................................................................................................................................ 89

Table 2-25 Scan menu ........................................................................................................................................................ 90

Table 2-26 Status-light legend .......................................................................................................................................... 92

Table 2-27 Primary control-panel light patterns .............................................................................................................. 92

Table 2-28 Secondary control-panel light patterns .......................................................................................................... 93

Table 2-29 Image defects table quick reference ............................................................................................................. 135

Table 2-30 Light print ....................................................................................................................................................... 137

Table 2-31 Gray background or dark print ...................................................................................................................... 137

Table 2-32 Blank page — No print ................................................................................................................................... 138

Table 2-33 Black page ...................................................................................................................................................... 138

Table 2-34 Banding defects ............................................................................................................................................. 139

Table 2-35 Streak defects ................................................................................................................................................ 139

Table 2-36 Fixing/fuser defects ....................................................................................................................................... 140

Table 2-37 Image placement defects .............................................................................................................................. 140

Table 2-38 Color plane registrations defects (color models only) ................................................................................. 141

Table 2-39 Output defects ............................................................................................................................................... 141

Table 2-40 Repetitive defects .......................................................................................................................................... 142

Table 2-41 Printer base jam sensors ............................................................................................................................... 170

Table 2-42 Printer base jam sensors ............................................................................................................................... 181

Table 2-43 Document feeder jam sensors ....................................................................................................................... 182

Table 2-44 Solve performance problems ........................................................................................................................ 196

Table 2-45 Service menu .................................................................................................................................................. 199

Table 2-46 Secondary service menu ................................................................................................................................ 201

Table 2-47 Solve problems receiving faxes ..................................................................................................................... 209

Table 2-48 Solve problems sending faxes ...................................................................................................................... 214

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List of figures

Figure 1-1 Relationship between the main printer systems ............................................................................................... 3

Figure 1-2 Engine-control system ........................................................................................................................................ 8

Figure 1-3 DC controller block diagram ............................................................................................................................... 9

Figure 1-4 Low-voltage power-supply circuit ................................................................................................................... 13

Figure 1-5 High-voltage power supply circuits .................................................................................................................. 15

Figure 1-6 Fuser components ............................................................................................................................................ 16

Figure 1-7 Fuser control ..................................................................................................................................................... 17

Figure 1-8 Laser scanner system ....................................................................................................................................... 19

Figure 1-9 Image-formation system .................................................................................................................................. 21

Figure 1-10 Main motor (M1) and image formation components ..................................................................................... 22

Figure 1-11 Sensors ............................................................................................................................................................ 23

Figure 1-12 Image-formation process ............................................................................................................................... 23

Figure 1-13 Pre-exposure .................................................................................................................................................. 24

Figure 1-14 Primary charging ............................................................................................................................................ 25

Figure 1-15 Laser-beam exposure ..................................................................................................................................... 26

Figure 1-16 Development .................................................................................................................................................. 26

Figure 1-17 Primary transfer ............................................................................................................................................. 27

Figure 1-18 Separation ....................................................................................................................................................... 28

Figure 1-19 Fusing .............................................................................................................................................................. 28

Figure 1-20 Drum cleaning ................................................................................................................................................. 29

Figure 1-21 ODT cartridge configuration ........................................................................................................................... 30

Figure 1-22 PT cartridge configuration .............................................................................................................................. 30

Figure 1-23 Pickup, feed, and delivery system .................................................................................................................. 32

Figure 1-24 Sensors and switches for the pickup, feed, and delivery system .................................................................. 34

Figure 1-25 Motors and solenoids ..................................................................................................................................... 35

Figure 1-26 Jam detection sensors .................................................................................................................................... 36

Figure 1-27 Image scanner model block diagram ............................................................................................................. 38

Figure 1-28 Integrated scanner assembly model block diagram ..................................................................................... 39

Figure 1-29 Motor and sensors .......................................................................................................................................... 40

Figure 2-1 Engine test page ............................................................................................................................................... 55

Figure 2-2 Sensors and switches (image formation system; printer base) ...................................................................... 56

Figure 2-3 Sensors (pickup, feed, and delivery system; printer base) .............................................................................. 57

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Figure 2-4 Service parts (cross section; printer base) ....................................................................................................... 58

Figure 2-5 Image formation (cross section; printer base) ................................................................................................. 59

Figure 2-6 Motor (cross section; printer base) ................................................................................................................... 60

Figure 2-7 Engine controller PCA connectors .................................................................................................................... 61

Figure 2-8 Formatter PCA (M101/M106) ............................................................................................................................ 62

Figure 2-9 Formatter PCA (M129/M134) ............................................................................................................................ 63

Figure 2-10 External plug and port locations (M101/M106) ............................................................................................. 64

Figure 2-11 External plug and port locations (M129/M134) ............................................................................................. 65

Figure 2-12 Main assemblies .............................................................................................................................................. 66

Figure 2-13 Main parts (printer base) ................................................................................................................................ 67

Figure 2-14 PCAs (printer base) ......................................................................................................................................... 67

Figure 2-15 General timing chart ....................................................................................................................................... 68

Figure 2-16 General circuit diagram ................................................................................................................................... 69

Figure 2-17 Sample configuration report .......................................................................................................................... 75

Figure 2-18 Print mode and optimize EWS page ............................................................................................................. 134

Figure 2-19 Repetitive image defect ruler ....................................................................................................................... 142

Figure 2-20 Examples of repetitive defects .................................................................................................................... 144

Figure 2-21 Place the ruler on the page .......................................................................................................................... 145

Figure 2-22 Locate the next repetitive defect ................................................................................................................. 145

Figure 2-23 Determine the defective assembly .............................................................................................................. 146

Figure 2-24 OPC short ...................................................................................................................................................... 147

Figure 2-25 White blotches .............................................................................................................................................. 148

Figure 2-26 OPC drum ghost ............................................................................................................................................ 149

Figure 2-27 Toner block contamination .......................................................................................................................... 150

Figure 2-28 Cartridge coupling (1 of 2) ............................................................................................................................ 151

Figure 2-29 Cartridge coupling (2 of 2) ............................................................................................................................ 152

Figure 2-30 Toner contamination .................................................................................................................................... 153

Figure 2-31 Vertical streaks ............................................................................................................................................. 154

Figure 2-34 Printer base jam sensors .............................................................................................................................. 170

Figure 2-35 Printer base jam sensors .............................................................................................................................. 181

Figure 2-36 Document feeder jam sensors ..................................................................................................................... 182

Figure A-1 Certificate of volatility M102/M103/M104/M106 (1 of 2) ............................................................................. 233

Figure A-2 Certificate of volatility M102/M103/M104/M106 (2 of 2) ............................................................................. 234

Figure A-3 Certificate of volatility M130/M131/M132/M134 base models (1 of 2) ....................................................... 235

Figure A-4 Certificate of volatility M130/M131/M132/M134 base models (2 of 2) ....................................................... 236

Figure A-5 Certificate of volatility M130//M131/M132/M134 models (1 of 2) .............................................................. 237

Figure A-6 Certificate of volatility M130//M131/M132/M134 models (2 of 2) .............................................................. 238

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1 Theory of operation

●

Basic operation

Engine-control system

Formatter

Laser scanner system

Image-formation system

Pickup, feed, and delivery system

Scanning and image capture system (M129-M134)

Engine-control system

Formatter

Laser scanner system

Image-formation system

Pickup, feed, and delivery system

canning and image capture system (M129-M134

)

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

The basic printer operation comprises the following systems:

●

Engine-control system

●

Laser scanner system

●

Image-formation system

●

Pickup, feed, and delivery system

●

Scanning and image capture system (M129–M134)

Figure 1-1 Relationship between the main printer systems

ENWW Basic operation 3

Sequence of operation

The DC controller PCA controls the operating sequence, as described in the following table.

Table 1-1 Sequence of operation

Period Duration Description

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

closed, or when the printer exits sleep mode until the printer is ready for printing.

Standby From the end of the waiting sequence or the last

rotation until the formatter receives a print command, or until the printer is turned off.

Initial rotation From the time the formatter receives a print

command until the paper enters the paper path.

Printing From the time the first sheet of paper enters the

paper path until the last sheet passes through the fuser.

●

Heats the fuser film in the fuser

●

Detects the presence of the toner cartridge

●

Rotates and stops the main motor

●

Cleans the transfer roller

●

Separates the developer roller

●

Remains in the Ready state

●

Enters Active OFF mode if a power control mode designation command is sent

●

Rotates the main motor

●

Activates the high-voltage power supply (highvoltage bias)

●

Prepares the laser scanner unit

●

Warms the fuser to the correct temperature

●

Engages the developer roller

●

Forms the image on the photosensitive drum

●

Transfers the toner to the paper

●

Fuses the toner image onto the paper

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

until the motors stop rotating.

●

Stops the main motor

●

Stops the high-voltage power supply (highvoltage bias)

●

Stops the laser scanner unit

●

Turns the fuser heater off

●

Separates the developer roller

●

If another print command is received, the printer enters the initial rotation period when the last rotation is complete.

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Formatter-control system

The formatter performs the following functions:

●

Controls the sleep delay function

●

Receives and processes print data from the various printer inputs

●

Monitors control-panel functions and relays printer status information (through the control panel and the bidirectional input/output)

●

Develops and coordinates data placement and timing with the DC controller

●

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

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

Sleep delay

When the printer is in sleep delay mode, the control-panel backlight is turned off, but the printer retains all printer settings, downloaded fonts, and macros. The default setting is a 15-minute idle time. The setting can be changed or turned off from the control panel menus.

The printer exits sleep delay mode and enters the warm-up cycle when any of the following occurs.

●

A print job, valid data, or a PML or PJL command is received at the serial port.

●

The control panel is touched (button press or touchscreen touch depending on model).

●

A document is loaded in the document feeder or the scanner lid is opened (M129/M134).

●

A tray is opened.

TIP: Error messages override the sleep delay message. The printer enters sleep mode at the appropriate

time, but the error message continues to appear.

Printer job language (PJL)

PJL is an integral part of printer configuration, in addition to the printer control language mobility (PCLM), printer working group (PWG) raster, and PostScript (PS). With standard cabling, the printer can use PJL to perform a variety of functions.

●

Dynamic I/O switching: The printer can be configured with a host on each I/O by using dynamic I/O switching. Even when the printer is offline, it can receive data from more than one I/O simultaneously, until the I/O buffer is full.

●

Context-sensitive switching: The printer can automatically recognize the personality (PS or PCLM) 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 printer in landscape mode, the subsequent print jobs print in landscape only if they are formatted for landscape printing.

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Printer management language (PML)

PML allows remote configuration of the printer and status monitoring through the input/output (I/O) ports.

Control panel

The formatter sends and receives printer status and command data to and from the control panel.

Wireless

NOTE: Wireless models only.

Wireless products contain a wireless card to enable 802.11b/g/n wireless communication.

Low end data model (LEDM) overview

The low-end data model (LEDM) provides one consistent data representation method and defines the dynamic and capabilities tickets shared between clients and devices, as well as the access protocol, event, security, and discovery methods.

Advanced control language (ACL) overview

The advanced control language (ACL) is a language that supports printer control and firmware downloads in printers that support both PJL/PCL and host-based printing. Each sequence of ACL commands must be preceded by a unified exit command (UEL) and an @PJL ENTER LANGUAGE=ACL command. The ACL sequence is always followed by a UEL. Any number of commands can be placed between the UELs. The only exception to these rules is the download command. If a firmware download is done, the download command must be the last command in the sequence. It will not be followed by a UEL.

The firmware searches for the UEL sequence when parsing commands. However, while downloading binary data such as host-based code or NVRAM data, the firmware suspends UEL parsing. To handle hosts that “disappear” during binary sequences, the firmware times out all ACL command sessions. If a timeout occurs during a non-download command sequence, it is treated as the receipt of a UEL. If a timeout occurs during firmware download, the printer resets.

CPU

The formatter incorporates a 600 MHz processor.

Input/output (I/O)

The following sections discuss the input and output features of the printer.

USB

The printer includes a universal serial bus (USB) 2.0 connection.

USB hosts

The printer includes USB hosts for USB flash drive and wireless communication control.

10/100 networking

The printer includes a 10/100 network (Ethernet) connection.

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Fax

NOTE: M129-M134 models only.

The printer includes a fax phone line connection.

Memory

If the printer encounters a problem when managing available memory, a clearable warning message appears on the control panel.

Firmware

The formatter stores the printer firmware. A remote firmware upgrade process is used to overwrite and upgrade the firmware.

Nonvolatile random access memory (NVRAM)

The printer uses nonvolatile memory (NVRAM) to store I/O and information about the print environment configuration. The contents of NVRAM are retained when the printer is turned off or disconnected.

Flash memory

DRR: Stores microprocessor control programs.

NAND: Stores fax memory (M129/M134 models only) and driver installation software.

Random access memory

DDR memory

●

128 MB (M101/M129 base model)

●

256 MB (all other models)

Flash memory

●

16 MB NOR (M101/M106 and M129 base model)

●

256 MB NAND flash (all other models)

HP Memory Enhancement technology (MEt)

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

NOTE: The MEt is available only in PCL mode; it is not functional when printing in PS mode.

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Engine-control system

Formatter

Engine-control system

Engine controller

DC controller

High-voltage power supply

Laser scanner system

Image-formation system

Pickup, feed, and delivery

system

Low-voltage power supply

Fuser control

Scanning and image

capture system (M129-M134)

Formatter

Engine-control system

Engine controller

DC controller

igh-voltage power suppl

Laser scanner system

Image-formation system

Pickup, feed, and delivery

stem

Low-voltage power suppl

user co

ntrol

canning and image

apture system (M129-M134

)

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

●

DC controller

●

Low-voltage power supply

●

High-voltage power supply

●

Fuser power supply

Figure 1-2 Engine-control system

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DC controller

Transfer front guide

High-voltage

power supply

Fan

Cartridge

LED

Motor

Solenoid

Switch

Photointerrupter

Formatter

Control panel

Laser scanner

assembly

Fuser

AC input

Low-voltage

power supply

DC controller

Sensor

Engine controller

Transfer roller

Image Scanner

(M129–M134)

Transfer front guid

igh-volta

ower suppl

artrid

LED

tor

olenoi

witc

Photointerrupter

Formatter

ontrol panel

aser scanne

assembl

use

AC inpu

Low-volta

ower suppl

DC controller

ensor

Engine controller

Transfer roller

Image Scanner

M129–M134

)

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

Figure 1-3 DC controller block diagram

Component type Abbreviation Description

Motor M1 Main motor

Solenoid SL1 Pickup solenoid

SL2 Developer alienation solenoid

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Component type Abbreviation Description

Switch SW1 Developer alienation switch

SW501 Cartridge door switch

SW740 Power switch

Photointerrupter PS601 Main motor rotation number sensor

SR760 Top of page (TOP) sensor

SR770 Media out sensor

SR771 Pickup media width sensor

SR780 Fuser output sensor

SR781 Fuser media width sensor

Sensor - Environment sensor

- Toner level sensor (M105-M106 and M133-M134 models)

LED LED391 Pre-exposure LED

LED740 Power supply LED

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