HP Color LaserJet Enterprise M552, Color LaserJet Enterprise M553, Color LaserJet Enterprise MFP M577 Repair Manual and Troubleshooting Manual

4.7 (3)

Color LaserJet Enterprise M552

Color LaserJet Enterprise M553

Color LaserJet Enterprise MFP M577

Troubleshooting Manual

M553n	M552dn	M553x
	M553dn

M577dn	M577f	M577c
		M577z

www.hp.com/support/colorlj552

www.hp.com/support/colorlj553

www.hp.com/support/colorljM577MFP

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

HP Color LaserJet Enterprise M553, HP Color LaserJet Enterprise M552, and HP Color LaserJet Enterprise MFP M577

Troubleshooting Manual

L.P.

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, 11/2015

Trademark Credits

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.

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

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

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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Conventions used in this guide

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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

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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For additional service and support information

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Table of contents

1 Theory of operation .......................................................................................................................................	1
For additional service and support ........................................................................................................................	2
Basic operation ......................................................................................................................................................	3
Sequence of operation ........................................................................................................................	5
Formatter-control system .....................................................................................................................................	7
Sleep mode ..........................................................................................................................................	7
Printer job language (PJL) ...................................................................................................................	8
Printer management language (PML) .................................................................................................	8
Control panel .......................................................................................................................................	8
Easy-access USB port ..........................................................................................................................	9
Wireless ...............................................................................................................................................	9
Near field communication (NFC) ..........................................................................................................	9
CPU .......................................................................................................................................................	9
Input/output (I/O) ................................................................................................................................	9
Memory ................................................................................................................................................	9
Firmware .........................................................................................................................	10
Nonvolatile random access memory (NVRAM) ...............................................................	10
Random access memory (RAM) ......................................................................................	10
HP Memory Enhancement technology (MEt) ..................................................................	10
Engine-control system ........................................................................................................................................	11
DC controller ......................................................................................................................................	12
Motors .............................................................................................................................	13
Fans .................................................................................................................................	14
Solenoids .........................................................................................................................	14
Clutches ...........................................................................................................................	14
Switches ..........................................................................................................................	14
Sensors ...........................................................................................................................	16
Low-voltage power supply ................................................................................................................	18
Low-voltage power supply voltages description ...........................................................	19
Over-current/over-voltage protection ...........................................................................	19
Sleep mode operation .....................................................................................................	19
Low-voltage power supply failure detection .................................................................	20

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Low-voltage power supply functions .............................................................................	20
High-voltage power supply ...............................................................................................................	20
High-voltage power supply circuits ................................................................................	21
Fuser bias ........................................................................................................................	22
Fuser control .....................................................................................................................................	22
Fuser circuits ...................................................................................................................	22
Fuser control functions ...................................................................................................	24
Fuser temperature control .............................................................................................	24
Fuser heater protection ..................................................................................................	26
Fuser unit life detection ..................................................................................................	26
Fuser identification .........................................................................................................	26
Engine laser/scanner system ..............................................................................................................................	27
Laser/scanner failure detection ........................................................................................................	28
Safety ................................................................................................................................................	28
Image-formation process .................................................................................................................	29
Step 1: Pre-exposure ......................................................................................................	35
Step 2: Primary charging ................................................................................................	35
Step 3: Laser-beam exposure .........................................................................................	36
Step 4: Development ......................................................................................................	36
Step 5: Primary transfer .................................................................................................	37
Step 6: Secondary transfer .............................................................................................	37
Step 7: Separation ...........................................................................................................	38
Step 8: Fusing ..................................................................................................................	38
Step 9: ITB cleaning .........................................................................................................	39
Step 10: Drum cleaning ...................................................................................................	39
Toner cartridges ................................................................................................................................	40
Design .............................................................................................................................	40
Memory chip ....................................................................................................................	42
Toner seal ........................................................................................................................	42
Toner level and cartridge life detection ..........................................................................	42
Developing unit engagement and disengagement control ...........................................	42
Cartridge Authentication Technology (CAT) ...................................................................	43
Authentication ..............................................................................................	44
Anti-theft ......................................................................................................	44
Intermediate transfer belt (ITB) unit .................................................................................................	45
Primary-transfer roller engagement and disengagement control ................................	45
ITB unit detection ............................................................................................................	47
ITB cleaning mechanism .................................................................................................	48
Secondary transfer roller functions ...............................................................................	48
Calibration .......................................................................................................................	49
Pickup, feed, and delivery system .......................................................................................................................	50

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Photo sensors and switches .............................................................................................................	51
Motors, clutches, and solenoids ........................................................................................................	53
Tray 1 (multipurpose)/Tray 2 (base printer) .....................................................................................	54
Tray 1 paper pickup and feed .........................................................................................	54
Tray 2 paper presence detection ....................................................................................	55
Tray 2 lift operation ........................................................................................................	55
Tray 2 paper pickup .........................................................................................................	56
Tray 2 multiple-feed prevention .....................................................................................	56
Tray 2 presence detection ..............................................................................................	57
Tray 2 skew feed prevention ...........................................................................................	57
Tray 2 media type detection ...........................................................................................	58
Feed speed control ..........................................................................................................	59
Duplexing unit (M552dn, M553dn, M553x, and M577 only) ............................................................	60
Duplexing reverse and duplex feed control ...................................................................	60
Jam detection/prevention .................................................................................................................	60
Fuser wrapping jam detection ........................................................................................	62
Loop control ..................................................................................................	62
Pressure roller pressurization and depressurization control ......................	63
Input accessories .................................................................................................................................................	65
Trays 3-5 ...........................................................................................................................................	65
Trays 3-5 driver PCA .......................................................................................................	65
Trays 3-5 motor control ..................................................................................................	66
Trays 3-5 electrical components ....................................................................................	66
Trays 3-5 paper pickup ...................................................................................................	67
Trays 3-5 multiple feed prevention ................................................................................	67
Trays 3-5 tray presence detection ..................................................................................	67
Trays 3-5 tray lift operation ...........................................................................................	68
Trays 3-5 jam detection ..................................................................................................	69
Scanning and image capture system (M577) ......................................................................................................	70
Document feeder system (M577) ........................................................................................................................	71
Document feed system .....................................................................................................................	71
Sensors in the document feeder .......................................................................................................	71
Document feeder paper path ............................................................................................................	72
Document feeder simplex operation ................................................................................................	73
Document feeder e-duplex operation ..............................................................................................	74
Deskew operation ..............................................................................................................................	74
Document feeder hinges ...................................................................................................................	75
2 Solve problems ............................................................................................................................................	77
For additional service and support .....................................................................................................................	78
Solve problems checklist .....................................................................................................................................	79

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Solve problems checklist ...................................................................................................................	79
Print the configuration page .............................................................................................................	84
Print menu map .................................................................................................................................	84
Print current settings pages .............................................................................................................	85
Print event log ...................................................................................................................................	86
Pre-boot menu options .....................................................................................................................	88
Remote Admin .................................................................................................................	98
Required software and network connection ................................................	98
Connect a remote connection ....................................................................	100
Disconnect a remote connection ................................................................	104
Troubleshooting process ...................................................................................................................................	107
Determine the problem source .......................................................................................................	107
Pre-troubleshooting checklist ......................................................................................	107
Troubleshooting owchart ...........................................................................................	108
Power subsystem ............................................................................................................................	109
Power-on checks ...........................................................................................................	109
Power-on troubleshooting overview .........................................................	109
Control panel checks .......................................................................................................................	113
Control-panel diagnostics ............................................................................................	113
Touchscreen diagnostic mode (M553x and M577) ....................................	113
Control-panel system diagnostics (M553x and M577) ..............................	118
Control panel diagnostic owcharts (M553x and M577) .............................................	133
Touchscreen black, white, or dim (no image) ............................................	134
Touchscreen is slow to respond or requires multiple presses to
respond .......................................................................................................	135
Touchscreen has an unresponsive zone ....................................................	136
No control panel sound ..............................................................................	137
Home button is unresponsive ....................................................................	138
Hardware integration pocket (HIP) is not functioning (control panel
functional) ..................................................................................................	139
Tools for troubleshooting ..................................................................................................................................	140
Individual component diagnostics ..................................................................................................	140
Tools for troubleshooting: LED diagnostics .................................................................	140
Understand lights on the formatter ...........................................................	140
Tools for troubleshooting: Engine diagnostics ............................................................	143
Engine test button ......................................................................................	143
Defeating interlocks ...................................................................................	145
Disable cartridge check ..............................................................................	147
Tools for troubleshooting: Paper path and sensor diagnostic tests ...........................	148
Paper path test ...........................................................................................	148
Paper path sensors test .............................................................................	149

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Manual sensor tests ...................................................................................	151
Tray/bin manual sensor test ......................................................................	153
Tools for troubleshooting: Print/stop test ...................................................................	154
Tools for troubleshooting: Component tests ...............................................................	156
Individual component diagnostics (special-mode test) ............................	156
Tools for troubleshooting: Scanner tests (M577 only) ................................................	158
Scanner tests ..............................................................................................	158
Diagrams .........................................................................................................................................	160
Diagrams: Block diagrams ............................................................................................	161
Sensors and switches .................................................................................	161
Cross section diagrams ..............................................................................	163
Diagrams: Printed circuit assembly (PCA) connector locations ...................................	164
DC controller PCA ........................................................................................	165
Formatter PCA (M552 and M553) ...............................................................	167
Formatter PCA (M577) ................................................................................	168
1x550-sheet paper feeder PCA ..................................................................	169
Scanner control board PCA .........................................................................	170
Diagrams: External plug and port locations .................................................................	171
Diagrams: Locations of major assemblies ...................................................................	172
Main assemblies (printer base) ..................................................................	172
Printed circuit assembly (PCA) locations ...................................................	175
Diagrams: General timing chart ...................................................................................	176
Diagrams: General circuit diagrams .............................................................................	177
Internal test and information pages ...............................................................................................	180
Print a configuration page ............................................................................................	180
HP embedded Jetdirect page .....................................................................	182
Finding important information on the configuration pages .....................	183
Print a cleaning page ....................................................................................................	184
Enable and configure auto cleaning ...........................................................	184
Control-panel menus ......................................................................................................................	185
Administration menu ....................................................................................................	185
Reports menu .............................................................................................	185
General Settings menu ...............................................................................	187
Copy Settings menu (M577 only) ...............................................................	201
Scan/Digital Send Settings menu (M577 only) ..........................................	209
Fax Settings menu (M577 only) .................................................................	219
General Print Settings menu ......................................................................	232
Default Print Options menu .......................................................................	235
Display Settings menu ...............................................................................	237
Manage Supplies menu ..............................................................................	239
Manage Trays menu ...................................................................................	244

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Network Settings menu .............................................................................	246
Troubleshooting menu ...............................................................................	257
Device Maintenance menu ............................................................................................	260
Backup/Restore menu ................................................................................	260
Calibration/Cleaning menu (M577 only) ....................................................	260
USB Firmware Upgrade menu ....................................................................	263
HP FutureSmart Level menu ......................................................................	263
Service menu ..............................................................................................	263
Control panel message document (CPMD) .....................................................................................	264
Control-panel message types ......................................................................................	264
Control-panel messages and event log entries ...........................................................	264
10.XX.YZ Error Messages ...........................................................................	264
11.XX.YZ Error Messages ...........................................................................	273
13.XX.YZ Error Messages ...........................................................................	273
20.XX.YZ Error Messages ...........................................................................	294
30.XX.YZ Error Messages ...........................................................................	295
31.XX.YZ Error Messages ...........................................................................	302
32.XX.YX and 33.XX.YZ Error Messages ....................................................	309
40.XX.YZ Error Messages ...........................................................................	317
41.XX.YZ Error Messages ...........................................................................	318
42.XX.YZ Error Messages ...........................................................................	326
44.XX.XX Error Messages ...........................................................................	326
47.XX.XX Error Messages ...........................................................................	328
48.XX.YY Error Messages ...........................................................................	331
49.XX.YY Error Messages ...........................................................................	331
50.WX.YZ Error Messages ..........................................................................	332
51.XX.YZ, 52.XX.YZ Error Messages ..........................................................	338
54.XX.YZ Error Messages ...........................................................................	338
55.XX.YZ, 56.XX.YZ Error Messages ..........................................................	340
57.XX.YZ Error Messages ...........................................................................	342
58.XX.YZ Error Messages ...........................................................................	343
59.XX.YZ Error Messages ...........................................................................	345
60.00.0Y, 62.00.00 Error Messages ...........................................................	348
70.XX.YY Error Messages ...........................................................................	348
80.WX.YZ, 81.WX.YZ, 82.WX.YZ Error Messages .......................................	349
90.XX.YY error messages ...........................................................................	350
98.0X.0Y Error Messages ...........................................................................	351
99.XX.YY Error Messages ...........................................................................	352
Alpha Error Messages .................................................................................	359
Tools for troubleshooting: Event log messages ..........................................................	389
Print or view an event log ...........................................................................	390

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Clear the event log .....................................................................................	391
Solve image-quality problems ..........................................................................................................................	392
Improve print quality ......................................................................................................................	392
Color band test ..............................................................................................................	392
Repetitive image defect ruler .......................................................................................	393
Use a ruler to measure between repetitive defects ..................................	394
Print-quality troubleshooting pages ............................................................................	397
Print-quality assessment page ....................................................................................	401
Print from a different software program .....................................................................	402
Check the paper-type setting for the print job ............................................................	403
Check toner-cartridge status .......................................................................................	403
Clean the printer ...........................................................................................................	404
Print a cleaning page ..................................................................................	404
Visually inspect the toner cartridge or cartridges .......................................................	404
Check paper and the printing environment .................................................................	405
Calibrate the printer ......................................................................................................	405
Use manual print modes ...............................................................................................	406
Image defects table ......................................................................................................	409
Clean the printer ................................................................................................................................................	417
Clean the paper path .......................................................................................................................	417
Print a cleaning page .......................................................................................................................	417
Clean the Tray 1 rollers ...................................................................................................................	418
Step 1: Remove the Tray 1 pickup roller .......................................................................	418
Step 2: Remove the Tray 1 separation roller ................................................................	420
Step 3: Clean the Tray 1 rollers .....................................................................................	422
Step 4: Install the Tray 1 separation roller ...................................................................	423
Step 5: Install the Tray 1 pickup roller ..........................................................................	426
Clean the Tray 2-X rollers ................................................................................................................	429
Step 1: Remove the Tray 2-X paper pickup roller assembly ........................................	429
Step 2: Remove the Tray 2-X separation roller ............................................................	432
Step 3: Clean the Tray 2-X rollers .................................................................................	434
Step 4: Install the Tray 2-X separation roller ...............................................................	434
Step 5: Install the Tray 2-X paper pickup roller assembly ...........................................	436
Check the scanner glass for dirt and smudges (M577 only) ..........................................................	439
Clean the pickup rollers and separation pad in the document feeder (M577 only) .......................	442
Solve paper handling problems ........................................................................................................................	444
Printer feeds incorrect page size ....................................................................................................	444
Printer pulls from incorrect tray .....................................................................................................	444
Printer will not duplex or duplexes incorrectly ...............................................................................	444
Paper does not feed from Tray 2-X .................................................................................................	445
Output is curled or wrinkled ............................................................................................................	445

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Printer does not pick up paper or misfeeds ....................................................................................	446
The printer does not pick up paper ..............................................................................	446
The printer picks up multiple sheets of paper .............................................................	447
Paper does not feed automatically ..............................................................................	447
Clear paper jams ..............................................................................................................................	447
Paper path jam sensor locations ..................................................................................	448
Auto-navigation for clearing jams ................................................................................	449
Experiencing frequent or recurring paper jams? .........................................................	449
Clear paper jams in the document feeder ....................................................................	451
Clear paper jams in Tray 1 ............................................................................................	454
Clear paper jams in Tray 2 ............................................................................................	456
Clear paper jams in the optional 550-sheet trays .......................................................	460
Clear paper jams in the right door and the fuser area .................................................	465
Clear paper jams in the output bin ...............................................................................	470
Change jam recovery ....................................................................................................	471
Solve performance problems ............................................................................................................................	472
Factors affecting print performance ...............................................................................................	472
Print speeds .....................................................................................................................................	473
The printer does not print or it prints slowly ..................................................................................	473
The printer prints slowly .................................................................................................................	474
Solve connectivity problems .............................................................................................................................	475
Solve USB connection problems .....................................................................................................	475
Solve wired network problems .......................................................................................................	475
Poor physical connection ..............................................................................................	475
The computer is using the incorrect IP address for the product ..................................	475
The computer is unable to communicate with the product .........................................	476
The product is using incorrect link and duplex settings for the network ....................	476
New software programs might be causing compatibility problems ...........................	476
The computer or workstation might be set up incorrectly ..........................................	476
The product is disabled, or other network settings are incorrect ...............................	476
Service mode functions .....................................................................................................................................	477
Service menu ...................................................................................................................................	477
Printer resets ...................................................................................................................................	479
Restore factory-set defaults ........................................................................................	479
Restore the service ID ...................................................................................................	479
Printer cold reset ..........................................................................................................	480
Format Disk and Partial Clean functions ........................................................................................	482
Active and repository firmware locations ....................................................................	482
Partial Clean ..................................................................................................................	482
Execute a Partial Clean ...............................................................................	483
Format Disk ...................................................................................................................	483

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	Execute a Format Disk ................................................................................	484
Firmware upgrades ............................................................................................................................................		486
Determine the installed revision of firmware .................................................................................		487
Perform a firmware upgrade ..........................................................................................................		488
HP Embedded Web Server ............................................................................................		488
USB	ash drive (Pre-boot menu) ..................................................................................	489
USB	ash drive (control-panel menu) ..........................................................................	491
Solve email problems ........................................................................................................................................		492
Cannot connect to the email server ................................................................................................		492
Validate the SMTP gateway (Windows) ..........................................................................................		492
Validate the LDAP gateway (Windows) ...........................................................................................		492
Appendix A Printer specifications ..................................................................................................................		493
Printer dimensions ............................................................................................................................................		494
Printer space requirements ...............................................................................................................................		499
Power consumption, electrical specifications, and acoustic emissions ...........................................................		499
Operating-environment range ..........................................................................................................................		499
Certificates of Volatility .....................................................................................................................................		500
Index ...........................................................................................................................................................		505

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List of tables

Table 1-1 Sequence of operation ..........................................................................................................................................		5
Table 1-2	Motors .................................................................................................................................................................	13
Table 1-3	Fans .....................................................................................................................................................................	14
Table 1-4	Solenoids ............................................................................................................................................................	14
Table 1-5	Clutches ..............................................................................................................................................................	14
Table 1-6	Switches ..............................................................................................................................................................	14
Table 1-7	Sensors ...............................................................................................................................................................	16
Table 1-8 Converted DC voltages .......................................................................................................................................		19
Table 1-9 Low-voltage power supply functions .................................................................................................................		20
Table 1-10 High-voltage power supply circuits .................................................................................................................		21
Table 1-11 Fuser components ............................................................................................................................................		23
Table 1-12 Low-voltage power supply functions ...............................................................................................................		24
Table 1-13	Motors ...............................................................................................................................................................	31
Table 1-14	Sensors .............................................................................................................................................................	32
Table 1-15 Image formation process .................................................................................................................................		33
Table 1-16 Primary-transfer roller engagement states ....................................................................................................		45
Table 1-17 Secondary transfer roller functions .................................................................................................................		48
Table 1-18	Calibration functions ........................................................................................................................................	49
Table 1-19 Photo sensors and switches .............................................................................................................................		51
Table 1-20 Motors, clutches, and solenoids .......................................................................................................................		53
Table 1-21 Print mode and feed speed ..............................................................................................................................		59
Table 1-22 Jams that the printer detects ...........................................................................................................................		61
Table 1-23 Trays 3-5 motor control ...................................................................................................................................		66
Table 1-24 Tray 3-5 electrical components .......................................................................................................................		66
Table 1-25 Pickup feed components (1x550-sheet paper feeder) ....................................................................................		67
Table 1-26 Document feeder sensors ................................................................................................................................		72
Table 1-27 Document feeder paper path ...........................................................................................................................		72
Table 2-1 Pre-boot menu options (1 of 7) ..........................................................................................................................		91
Table 2-2 Pre-boot menu options (2 of 7) ..........................................................................................................................		92
Table 2-3 Pre-boot menu options (3 of 7) ..........................................................................................................................		93
Table 2-4 Pre-boot menu options (4 of 7) ..........................................................................................................................		94
Table 2-5 Pre-boot menu options (5 of 7) ..........................................................................................................................		94

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Table 2-6 Pre-boot menu options (6 of 7) ..........................................................................................................................		95
Table 2-7 Pre-boot menu options (7 of 7) ..........................................................................................................................		96
Table 2-8	Troubleshooting owchart ...............................................................................................................................	108
Table 2-9 Heartbeat LED, product initialization ...............................................................................................................		141
Table 2-10 Heartbeat LED, product operational ..............................................................................................................		142
Table 2-11 Paper-path sensors diagnostic tests .............................................................................................................		149
Table 2-12 Manual sensor diagnostic tests .....................................................................................................................		152
Table 2-13 Tray/bin manual sensors ................................................................................................................................		154
Table 2-14 Component test details ..................................................................................................................................		157
Table 2-15 Printer base, sensors and switches block diagram .......................................................................................		161
Table 2-16 1x550-sheet paper feeder, sensors and switches block diagram ................................................................		162
Table 2-17 Document feeder, sensors block diagram .....................................................................................................		162
Table 2-18 Printer base cross section diagram ................................................................................................................		163
Table 2-19 1x550-sheet paper feeder cross section diagram ........................................................................................		164
Table 2-20 DC controller PCA ............................................................................................................................................		165
Table 2-21 Formatter PCA ................................................................................................................................................		167
Table 2-22 Formatter PCA ................................................................................................................................................		168
Table 2-23 1x550-sheet paper feeder PCA ......................................................................................................................		169
Table 2-24 Scan control board PCA ..................................................................................................................................		170
Table 2-25 External plug and port locations ....................................................................................................................		171
Table 2-26 Main assemblies, printer base (1 of 2) ...........................................................................................................		172
Table 2-27 Main assemblies, printer base (2 of 2) ...........................................................................................................		173
Table 2-28 PCA locations (printer base) ...........................................................................................................................		175
Table 2-29	Configuration page .........................................................................................................................................	181
Table 2-30 HP embedded Jetdirect page .........................................................................................................................		182
Table 2-31 Important information on the configuration pages ......................................................................................		183
Table 2-32 Reports menu .................................................................................................................................................		185
Table 2-33 General Settings menu ...................................................................................................................................		187
Table 2-34 Copy Settings menu (M577 only) ...................................................................................................................		201
Table 2-35 Scan/Digital Send Settings menu (M577 only) ..............................................................................................		209
Table 2-36 Fax Settings menu (M577 only) .....................................................................................................................		219
Table 2-37 General Print Settings menu ..........................................................................................................................		232
Table 2-38 Default Print Options menu ...........................................................................................................................		235
Table 2-39 Display Settings menu ...................................................................................................................................		237
Table 2-40 Manage Supplies menu ..................................................................................................................................		239
Table 2-41 Manage Trays menu .......................................................................................................................................		244
Table 2-42 Network Settings menu .................................................................................................................................		246
Table 2-43 Wireless Menu ................................................................................................................................................		246
Table 2-44 Embedded Jetdirect Menu ..............................................................................................................................		246
Table 2-45 Troubleshooting menu ...................................................................................................................................		257
Table 2-46 Backup/Restore menu ....................................................................................................................................		260

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Table 2-47 Calibration/Cleaning menu (M577) ................................................................................................................		260
Table 2-48 Call out Cable identification ...........................................................................................................................		295
Table 2-49 Call out Cable identification ...........................................................................................................................		302
Table 2-50 Sample event log page ...................................................................................................................................		389
Table 2-51	Repetitive defects ..........................................................................................................................................	393
Table 2-52 Print modes under the Adjust Paper Types submenu ...................................................................................		407
Table 2-53 Print modes under the Optimize submenu ....................................................................................................		407
Table 2-54 Image defects table ........................................................................................................................................		409
Table 2-55 Printer feeds incorrect page size ...................................................................................................................		444
Table 2-56 Printer pulls from incorrect tray ....................................................................................................................		444
Table 2-57 Printer will not duplex (print 2-sided jobs) or duplexes incorrectly ..............................................................		444
Table 2-58 Paper does not feed from Tray 2-X ................................................................................................................		445
Table 2-59 Output is curled or wrinkled ...........................................................................................................................		445
Table 2-60 Paper does not feed automatically ................................................................................................................		447
Table 2-61 Printer base jam sensors ................................................................................................................................		448
Table 2-62 1x550-sheet paper-feeder jam sensors ........................................................................................................		449
Table 2-63 Document feeder, sensors block diagram .....................................................................................................		449
Table 2-64 Solve performance problems .........................................................................................................................		472
Table A-1	Operating-environment specifications ............................................................................................................	499

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List of figures

Figure 1-1 Relationship between the main printer systems ...............................................................................................		3
Figure 1-2 System block diagram .........................................................................................................................................		4
Figure 1-3	Engine-control system ......................................................................................................................................	11
Figure 1-4 DC controller block diagram ..............................................................................................................................		12
Figure 1-5 Low-voltage power-supply circuit ....................................................................................................................		18
Figure 1-6 High-voltage power supply circuits ..................................................................................................................		21
Figure 1-7 Fuser components ............................................................................................................................................		23
Figure 1-8 Fuser temperature-control circuit ....................................................................................................................		25
Figure 1-9	Laser/scanner system .......................................................................................................................................	27
Figure 1-10 Image-formation system ................................................................................................................................		30
Figure 1-11	Motors .............................................................................................................................................................	31
Figure 1-12	Sensors ............................................................................................................................................................	32
Figure 1-13	Image-formation process ...............................................................................................................................	33
Figure 1-14	Pre-exposure ..................................................................................................................................................	35
Figure 1-15	Primary charging .............................................................................................................................................	35
Figure 1-16 Laser-beam exposure .....................................................................................................................................		36
Figure 1-17	Development ...................................................................................................................................................	36
Figure 1-18	Primary transfer ..............................................................................................................................................	37
Figure 1-19	Secondary transfer .........................................................................................................................................	37
Figure 1-20	Separation .......................................................................................................................................................	38
Figure 1-21	Fusing ..............................................................................................................................................................	38
Figure 1-22	ITB cleaning .....................................................................................................................................................	39
Figure 1-23	Drum cleaning .................................................................................................................................................	39
Figure 1-24 Toner cartridge system ...................................................................................................................................		41
Figure 1-25 Developer roller engagement and disengagement control ...........................................................................		43
Figure 1-26	ITB unit ............................................................................................................................................................	45
Figure 1-27 Three states of primary-transfer roller engagement and disengagement ...................................................		46
Figure 1-28 ITB cleaning process .......................................................................................................................................		48
Figure 1-29 Pickup, feed, and delivery system ..................................................................................................................		50
Figure 1-30 Photo sensors and switches ...........................................................................................................................		51
Figure 1-31 Motors, clutches, and solenoids .....................................................................................................................		53
Figure 1-32 Tray 1 pickup mechanism ...............................................................................................................................		55

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Figure 1-33 Tray 2 multiple-feed prevention .....................................................................................................................		57
Figure 1-34	Skew-feed prevention .....................................................................................................................................	58
Figure 1-35	Media sensors .................................................................................................................................................	59
Figure 1-36 Jam detection sensors ....................................................................................................................................		61
Figure 1-37 Loop control mechanism ................................................................................................................................		63
Figure 1-38 Pressure roller pressurization control ............................................................................................................		63
Figure 1-39 550-sheet paper feeder ..................................................................................................................................		65
Figure 1-40 Tray 3-5 driver PCA .........................................................................................................................................		66
Figure 1-41 Paper pickup and feed operation (550-sheet paper feeder) .........................................................................		67
Figure 1-42 Jam detection (1x550-sheet paper feeder) ...................................................................................................		69
Figure 1-43 Document feeder sensors ..............................................................................................................................		72
Figure 1-44 Document feeder paper path .........................................................................................................................		72
Figure 1-45	Deskew operation ...........................................................................................................................................	75
Figure 1-46 Document feeder open (book mode) ..............................................................................................................		76
Figure 1-47 Document feeder open (60º to 80º) ...............................................................................................................		76
Figure 2-1 Open the Pre-boot menu ..................................................................................................................................		88
Figure 2-2 Pre-boot menu ..................................................................................................................................................		89
Figure 2-3 Open the Pre-boot menu ..................................................................................................................................		90
Figure 2-4 Open the Control Panel .....................................................................................................................................		99
Figure 2-5 Turn Windows features on or off ......................................................................................................................		99
Figure 2-6 Enable the telnet client feature ......................................................................................................................		100
Figure 2-7 Select the +3:Administrator item ...................................................................................................................		101
Figure 2-8 Select the +A:Remote Admin item ..................................................................................................................		101
Figure 2-9 Select the 1:Start Telnet item .........................................................................................................................		101
Figure 2-10 Telnet connecting message ..........................................................................................................................		101
Figure 2-11 Telnet error message ....................................................................................................................................		102
Figure 2-12 Telnet server function initialized ..................................................................................................................		102
Figure 2-13 Open a command window ............................................................................................................................		103
Figure 2-14 Start a telnet session ....................................................................................................................................		103
Figure 2-15 Establish a telnet connection .......................................................................................................................		103
Figure 2-16	Enter the PIN .................................................................................................................................................	104
Figure 2-17 Remote Admin window .................................................................................................................................		104
Figure 2-18 Access the administrator menu ....................................................................................................................		105
Figure 2-19 Access the remote admin menu ...................................................................................................................		105
Figure 2-20 Terminate the telnet connection ..................................................................................................................		106
Figure 2-21 Diagnostic-tests access button ....................................................................................................................		113
Figure 2-22 Press the diagnostics-access button ............................................................................................................		114
Figure 2-23 Diagnostic-tests access button ....................................................................................................................		114
Figure 2-24 Press the diagnostics-access button ............................................................................................................		115
Figure 2-25 Control-panel version A yellow screen .........................................................................................................		115
Figure 2-26 Exit the diagnostic mode ..............................................................................................................................		117

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Figure 2-27 Open the Pre-boot menu ..............................................................................................................................		118
Figure 2-28 Pre-boot menu ..............................................................................................................................................		119
Figure 2-29 Access the administration menu ..................................................................................................................		120
Figure 2-30 Access the diagnostics menu ........................................................................................................................		120
Figure 2-31 Open the screen test .....................................................................................................................................		121
Figure 2-32 Blue vertical gradient screen ........................................................................................................................		121
Figure 2-33 Open the touch test ......................................................................................................................................		125
Figure 2-34 Touch the white grid .....................................................................................................................................		125
Figure 2-35 Verify the mark .............................................................................................................................................		126
Figure 2-36 Open the softkey test ...................................................................................................................................		127
Figure 2-37 Touch the Home button ................................................................................................................................		127
Figure 2-38	Successful test ..............................................................................................................................................	128
Figure 2-39 Open the backlight test .................................................................................................................................		129
Figure 2-40 Open the sound test ......................................................................................................................................		130
Figure 2-41 Open the sound test ......................................................................................................................................		131
Figure 2-42 Open the sound test ......................................................................................................................................		132
Figure 2-43 Touchscreen blank, white, or dim (no image) ..............................................................................................		134
Figure 2-44 Touchscreen is slow to respond or requires multiple presses to respond ...................................................		135
Figure 2-45 Touchscreen has an unresponsive zone .......................................................................................................		136
Figure 2-46 No control panel sound .................................................................................................................................		137
Figure 2-47 Home button is unresponsive .......................................................................................................................		138
Figure 2-48 Hardware integration pocket (HIP) is not functioning (control panel functional) .......................................		139
Figure 2-49 Engine test button ........................................................................................................................................		144
Figure 2-50 Defeating interlocks (front door) ..................................................................................................................		145
Figure 2-51 Defeating interlocks (right door; right side) .................................................................................................		146
Figure 2-52 Defeating interlocks (right door; left side) ...................................................................................................		146
Figure 2-53 Printer base, sensors and switches block diagram ......................................................................................		161
Figure 2-54 1x550-sheet paper feeder, sensors and switches block diagram ...............................................................		162
Figure 2-55 Document feeder, sensors block diagram ....................................................................................................		162
Figure 2-56 Printer base cross section diagram ..............................................................................................................		163
Figure 2-57 1x550-sheet paper feeder cross section diagram .......................................................................................		164
Figure 2-58 DC controller PCA ..........................................................................................................................................		165
Figure 2-59	Formatter PCA ...............................................................................................................................................	167
Figure 2-60	Formatter PCA ...............................................................................................................................................	168
Figure 2-61 1x550-sheet paper feeder PCA ....................................................................................................................		169
Figure 2-62 Scan control board PCA .................................................................................................................................		170
Figure 2-63 External plug and port locations ..................................................................................................................		171
Figure 2-64 Main assemblies, printer base (1 of 2) .........................................................................................................		172
Figure 2-65 Main assemblies, printer base (2 of 2) .........................................................................................................		173
Figure 2-66 PCA locations (printer base) .........................................................................................................................		175
Figure 2-67 General timing chart .....................................................................................................................................		176

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Figure 2-68 General circuit diagram (printer base) (1 of 2) .............................................................................................		177
Figure 2-69 General circuit diagram (printer base) (2 of 2) .............................................................................................		178
Figure 2-70 General circuit diagram 1x550-sheet paper feeder .....................................................................................		179
Figure 2-71	Configuration page .......................................................................................................................................	181
Figure 2-72	Configuration page .......................................................................................................................................	182
Figure 2-73 Paper Tray guides .........................................................................................................................................		275
Figure 2-74 Paper height guides ......................................................................................................................................		275
Figure 2-75 Paper Tray guides .........................................................................................................................................		277
Figure 2-76 Paper height guides ......................................................................................................................................		277
Figure 2-77 Paper Tray guides .........................................................................................................................................		279
Figure 2-78 Paper height guides ......................................................................................................................................		279
Figure 2-79 Tray 1 Paper guides ......................................................................................................................................		283
Figure 2-80 Tray 1 Paper height guides ...........................................................................................................................		283
Figure 2-81 Tray 2 Paper guides ......................................................................................................................................		284
Figure 2-82 Tray 2 Paper height guides ...........................................................................................................................		284
Figure 2-83 Paper Tray guides .........................................................................................................................................		287
Figure 2-84 Paper height guides ......................................................................................................................................		287
Figure 2-85 500 Sheet paper tray door ............................................................................................................................		364
Figure 2-86 Sample event log ..........................................................................................................................................		389
Figure 2-87 Examples of repetitive defects .....................................................................................................................		394
Figure 2-88 Place the ruler on the page ...........................................................................................................................		395
Figure 2-89 Locate the next repetitive defect .................................................................................................................		395
Figure 2-90 Determine the defective assembly ...............................................................................................................		396
Figure 2-91 Print-quality troubleshooting procedure .....................................................................................................		398
Figure 2-92 Yellow print-quality troubleshooting page ..................................................................................................		398
Figure 2-93 Yellow comparison page ...............................................................................................................................		399
Figure 2-94 Black print-quality troubleshooting page ....................................................................................................		400
Figure 2-95	Open Tray 1 ...................................................................................................................................................	418
Figure 2-96 Open the roller cover ....................................................................................................................................		418
Figure 2-97 Remove the cover .........................................................................................................................................		419
Figure 2-98 Release two tabs ...........................................................................................................................................		419
Figure 2-99 Remove the roller .........................................................................................................................................		420
Figure 2-100 Release the tray retainers ..........................................................................................................................		420
Figure 2-101	Raise Tray 1 up ............................................................................................................................................	421
Figure 2-102 Open the roller cover ..................................................................................................................................		421
Figure 2-103 Release one tab ..........................................................................................................................................		422
Figure 2-104 Remove the roller .......................................................................................................................................		422
Figure 2-105 Clean the rollers ..........................................................................................................................................		423
Figure 2-106 Locate the keyed end of the roller and the holder .....................................................................................		423
Figure 2-107 Install the roller ..........................................................................................................................................		424
Figure 2-108 Rotate the end of the roller into the holder ...............................................................................................		424

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Figure 2-109 Close the roller cover ..................................................................................................................................		425
Figure 2-110 Lower Tray 1 down ......................................................................................................................................		425
Figure 2-111 Reconnect the tray retainers ......................................................................................................................		426
Figure 2-112 Install the roller ..........................................................................................................................................		426
Figure 2-113 Reconnect two tabs ....................................................................................................................................		427
Figure 2-114 Install the roller cover .................................................................................................................................		427
Figure 2-115 Close the roller cover ..................................................................................................................................		428
Figure 2-116	Close Tray 1 .................................................................................................................................................	428
Figure 2-117 Pull the tray out ..........................................................................................................................................		429
Figure 2-118 Remove the tray .........................................................................................................................................		429
Figure 2-119 Open the right door ....................................................................................................................................		430
Figure 2-120 Raise the transfer roller assembly .............................................................................................................		430
Figure 2-121 Lower the paper guide ................................................................................................................................		431
Figure 2-122 Locate the tray pickup roller .......................................................................................................................		431
Figure 2-123 Slide the assembly to the left .....................................................................................................................		432
Figure 2-124 Remove the roller assembly .......................................................................................................................		432
Figure 2-125 Locate the roller assembly .........................................................................................................................		433
Figure 2-126 Push up on the blue label ...........................................................................................................................		433
Figure 2-127 Remove the roller assembly .......................................................................................................................		434
Figure 2-128 Clean the rollers ..........................................................................................................................................		434
Figure 2-129 Install the roller assembly ..........................................................................................................................		435
Figure 2-130 Fully seat the roller assembly ....................................................................................................................		435
Figure 2-131 Check the installation .................................................................................................................................		436
Figure 2-132 Note of the mounting tab ...........................................................................................................................		436
Figure 2-133 Position the roller assembly in the printer .................................................................................................		437
Figure 2-134 Release the spring loaded shaft .................................................................................................................		437
Figure 2-135 Verify the roller installation .......................................................................................................................		438
Figure 2-136	Install the tray .............................................................................................................................................	438
Figure 2-137	Close the tray ..............................................................................................................................................	439
Figure 2-138 Printer base jam sensors ............................................................................................................................		448
Figure 2-139 1x550-sheet paper-feeder jam sensors ....................................................................................................		449
Figure 2-140 Document feeder jam sensors ...................................................................................................................		449
Figure 2-141 Open the Pre-boot menu ............................................................................................................................		480
Figure 2-142 Open the Pre-boot menu ............................................................................................................................		483
Figure 2-143 Open the Pre-boot menu ............................................................................................................................		484
Figure 2-144 Open the Pre-boot menu ............................................................................................................................		489
Figure A-1 Dimensions for the M552dn and M553n/dn models ......................................................................................		494
Figure A-2 Dimensions for the M553x model ..................................................................................................................		494
Figure A-3 Dimensions for the M577 models ..................................................................................................................		495
Figure A-4 Dimensions for the 1 x 550-sheet paper feeder ............................................................................................		495
Figure A-5 Dimensions for the cabinet/stand ..................................................................................................................		496

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Figure A-6	Dimensions for the M552 and M553 models with one 1 x550-sheet tray and the cabinet/stand ...............	497
Figure A-7	Dimensions for the M577 models with three 1 x 550-sheet paper feeders and the cabinet/stand .............	498
Figure A-8	Certificate of Volatility (M522/M553; 1 of 2) ..................................................................................................	500
Figure A-9	Certificate of Volatility (M522/M553; 2 of 2) ..................................................................................................	501
Figure A-10	Certificate of Volatility (M577; 1 of 2) ..........................................................................................................	502
Figure A-11	Certificate of Volatility (M577; 2 of 2) ..........................................................................................................	503

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1Theory of operation

●For additional service and support

●Basic operation

●Formatter-control system

●Engine-control system

●Engine laser/scanner system

●Pickup, feed, and delivery system

●Input accessories

●Scanning and image capture system (M577)

●Document feeder system (M577)

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For additional service and support

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 (CSN) 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 & regulatory information

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

2 Chapter 1 Theory of operation

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