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HP M3027 Service Manual - Page 83

Timing diagram, HP LaserJet M3027/M3035, Timing

UPC - 882780570054

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Timing 71 Figure 4-20 Timing diagram, HP LaserJet M3027/M3035 ENWW SEQUENCE Power Switch ON WAIT 1 Print Command 2 Main Motor (M1) 3 Fuser Heater (H1) 4 Fuser Motor (M2) 5 Scanner Motor(M3) 6 Cassette Pickup Solenoid (SL1) 7 Tray 1 Pickup Solenoid (SL2) 8 Paper Feeder Pickup Solenoid (SL3) 9 Top of Page Sensor (PS801) 10 Delivery Sensor (PS803) 11 Primary Charging Bias (AC) 12 Primary Charging Bias (DC) 13 Developing Bias (AC) 14 Developing Bias (DC) 15 Transfer Charging Bias 16 Laser Diode 17 LASER BEAM signal (BD) 18 19 20 0.2 120°C Control 0.5 About 7.4 About 3.3 About 0.22 About 0.22 About 6.2 Negative Bias STBY INTR PRINT LSTR 0.2 120°C Control 0.5 0.7 3.7 3.9 3.2 3.0 About 0.7 About 0.4 About 1.2 About 1.39 About 1.05 About 1.46 0.8 1.43 0.27 0.09 0.23 0.09 0.23 1.5 About 0.44 About 1.5 0.78 Forced emission 0.16 0.23 0.16 0.34 0.47 0.23 (Unit:Seconds) STBY

Section	Page
Product Information	13
Chapter contents	13
Device configurations	14
Features	15
Walkaround	17
Device parts	17
Interface ports	18
Device software	19
Supported operating systems	19
Minimum system requirements	19
Supported printer drivers	20
Select the correct printer driver	21
Universal printer drivers	21
Driver Autoconfiguration	21
Update Now	21
HP Driver Preconfiguration	21
Priority for print settings	22
Open the printer drivers	23
Software for Macintosh computers	24
Remove software from Macintosh operating systems	24
Utilities	25
HP Web Jetadmin	25
Embedded Web server	25
HP Easy Printer Care software	26
Supported operating systems	26
Supported browsers	26
Other components and utilities	26
Media specifications	27
General guidelines for media	27
Paper to avoid	28
Paper that can damage the device	28
General media specifications	29
Select print media	29
Supported media sizes	30
Supported media types	31
Installation and configuration	33
Chapter contents	33
Site preparation	34
Location specifications	34
Operating environment	34
Install trays	35
Load tray 1 (multipurpose tray)	35
Load tray 2 and optional tray 3	37
Configure trays	38
Install supplies	39
Supply replacement guidelines	39
Change the print cartridge	39
Install accessories	42
Install memory	42
Install device memory	42
Check DIMM installation	46
Enable memory for Windows	46
Use HP Jetdirect print server cards	47
Install an HP Jetdirect print server card	47
Remove an HP Jetdirect print server card	48
Maintenance	49
Chapter contents	49
Manage supplies	50
Supplies life	50
Approximate print-cartridge replacement intervals	50
Manage the print cartridge	51
Print-cartridge storage	51
Use genuine HP print cartridges	51
HP policy on non-HP print cartridges	51
Print-cartridge authentication	51
HP fraud hotline and Web site	51
Clean the device	52
Clean the exterior	52
Clean the ADF	52
Clean the scanner lid backing	54
Clean the scanner glass	55
Clean the fuser	56
Clean spilled toner	56
Management tools	57
Use information pages	57
Use the HP Easy Printer Care software	59
Open the HP Easy Printer Care software	59
HP Easy Printer Care software sections	60
Use the embedded Web server	61
Open the embedded Web server by using a network connection	61
Embedded Web server sections	62
Use HP Web Jetadmin software	64
Use the HP Printer Utility for Macintosh	64
Open the HP Printer Utility	64
HP Printer Utility features	65
Theory of operation	67
Chapter contents	67
Basic operation	68
ADF/scanner system	69
ADF	69
Sensors in the ADF	69
ADF paper path	69
Scanner	70
Formatter	71
Engine control unit (ECU)	72
Pickup/feed/delivery system	74
Laser/scanner system	75
Image-formation system	76
Step 1: Primary charging	77
Step 2: Laser beam exposure	77
Step 3: Developing	77
Step 4: Transfer	78
Step 5: Separation	78
Step 6: Fusing	79
Step 7: Drum cleaning	79
Internal components	80
Timing	81
Print cartridge memory system	85
Removal and replacement	87
Chapter contents	87
Introduction	89
Removal and replacement strategy	89
Electrostatic discharge	89
User-replaceable parts	89
Required tools	90
Before performing service	90
Parts removal order	91
Automatic document feeder (ADF) and scanner assemblies	92
ADF assembly	92
ADF cover	92
ADF input tray	94
Control panel	96
ADF	99
Scanner assembly	102
Covers	106
Right-side cover	106
Formatter shield	107
Fax cover	108
Left-side cover	109
Legal cover (dust cover)	112
Back cover	113
I/O cover	115
Fax rail	116
Top cover	117
Front, right cover	121
Fax accessory	123
Disk drive	125
Formatter	128
Stapler	129
Stapler power-supply	135
Right-side fan	140
Engine control unit (ECU)	143
Left-side riser	150
Fuser	151
Laser/scanner	154
Access plate	156
Oblique-roller assembly	158
Left-side fan	160
High-voltage power supply (HVPS)	161
Feed-guide assembly	168
Main motor	171
Gear assembly	174
Reinstallation notes for the gear assembly	177
Tray 1 solenoid	178
Tray 2 solenoid	179
Pickup assembly	180
Tray 1 media-present sensor and top-of-page sensor	185
E-label reader (memory tag)	187
Face-down-roller shaft	189
Cartridge door	191
Transfer roller	194
Registration assembly	195
Tray 1 pickup roller	198
Tray 2 pickup roller	199
Separation pad	201
Troubleshooting	203
Chapter contents	203
Troubleshooting process	204
Troubleshooting tree	204
Troubleshooting flowchart	205
1. Does the control-panel display show READY?	205
2. Can you print a configuration page?	206
3. Does the device copy?	207
4. Does the device send a fax?	208
5. Does the device receive a fax?	209
6. Can you print from a program?	210
7. Does the job print as expected?	211
8. Does the device select the correct trays?	212
Control-panel messages	213
Control-panel message types	213
Resolve control-panel messages	213
Clear jams	226
Common causes of jams	226
Jam locations	227
Jam detection	228
Clear jams from the ADF	229
Clear jams from the print-cartridge area	231
Clear jams from the input-tray areas	232
Clear jams from the duplexer	234
Clear jams from the output-bin areas	235
Interface troubleshooting	237
Communications checks	237
LAN hardware test	237
Service mode functions	238
Boot-up key sequences	238
Low-level boot-up key sequence for selecting a language, performing a cold reset, and enabling and d ...	239
Medium-level boot-up key sequence for initializing disks	239
High-level boot-up key sequence for NVRAM initialization, manufacturing, and skipping disk-load and ...	239
Service menu	240
Service ID	240
Restore the service ID	241
Convert the service ID to an actual date	241
Troubleshooting tools	242
Control-panel menus	242
Print Quality menu	242
Troubleshooting menu	243
Early-boot diagnostic test	245
Test pages	246
Engine-test page	246
Formatter test page	247
Embedded Web server	247
Gaining access to the embedded Web server	247
Information tab	247
Settings tab	248
Networking tab	248
Other links	248
Image defect ruler	250
Firmware updates and recovery	251
Determine the current level of firmware	251
Download the new firmware from the HP Web site	251
Transfer the new firmware to the device	252
Use FTP to upgrade the firmware on a network connection	252
Use HP Web Jetadmin to upgrade the firmware	253
Use MS-DOS commands to upgrade the firmware	254
Upgrade the HP Jetdirect firmware	254
Troubleshoot general printing problems	255
Troubleshoot media-handling problems	258
Multiple pages feed	258
Pages are wrinkled or folded	258
Pages are skewed	259
Troubleshoot print-quality problems	260
Print-quality checklist	260
Image-defect examples	261
Light print (partial page)	262
Light print (entire page)	263
Specks	263
Dropouts	264
Lines	264
Gray background	265
Toner smear	265
Loose toner	266
Repeating defects	266
Repeating image	267
Misformed characters	267
Page skew	268
Curl or wave	268
Wrinkles or creases	269
Vertical white lines	269
Tire tracks	270
White spots on black	270
Scattered lines	271
Blurred print	271
Random image repetition	272
Diagrams	273
Device component locations	273
Main assemblies	273
Main parts	274
Sensors and switches	275
Motors, fans, and solenoids	276
PCAs	277
Wiring diagrams	278
Parts and diagrams	281
Chapter contents	281
Ordering parts and supplies	282
Parts	282
Related documentation and software	282
Supplies	282
Consumables and accessories	283
Consumables and accessories	283
ADF/scanner assembly	284
Covers	286
Internal components	288
Tray 2 pickup assembly	302
Alphabetical parts list	304
Numerical parts list	314
Supplies and accessories	325
Order parts, accessories, and supplies	326
Order directly from HP	326
Order through service or support providers	326
Order directly through the embedded Web server (for printers that are connected to a network)	326
Order directly through the HP Easy Printer Care software	326
Part numbers	327
Paper-handling accessories	327
Print cartridge	327
Memory	327
Cables and interfaces	327
Stapler accessories	328
Print media	328
Service and support	331
Hewlett-Packard limited warranty statement	331
Customer self repair warranty service	332
Print cartridge limited warranty statement	332
HP Customer Care	334
Online Services	334
Telephone support	334
Software utilities, drivers, and electronic information	334
HP direct ordering for accessories or supplies	334
HP service information	334
HP service agreements	334
HP Easy Printer Care software	335
HP support and information for Macintosh computers	335
HP maintenance agreements	336
On-site service agreements	336
Next-day on-site service	336
Weekly (volume) on-site service	336
Repacking the device	336
Extended warranty	337
Specifications	339
Physical specifications	340
Electrical specifications	340
Acoustic emissions	341
Operating environment	341
Regulatory information	343
FCC regulations	344
Environmental product stewardship program	345
Protecting the environment	345
Ozone production	345
Power consumption	345
Toner consumption	345
Paper use	345
Plastics	345
HP LaserJet print supplies	345
HP print supplies returns and recycling program information	346
Paper	346
Material restrictions	346
Disposal of waste equipment by users in private households in the European Union	347
Material Safety Data Sheet (MSDS)	347
For more information	347
Telecom statement	349
Declaration of conformity	350
Safety statements	351
Laser safety	351
Canadian DOC regulations	351
VCCI statement (Japan)	351
Power cord statement (Japan)	351
EMI statement (Korea)	351
EMI statement (Taiwan)	352
Laser statement for Finland	352
Working with memory and print server cards	353
Overview	354
Glossary	355