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HP LaserJet M2727 Service Manual - Page 172

Remove the ECU 2 of 7

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2. Remove the wire harnesses from the retainer under the feed plate (callout 1), and then remove the feed plate by lifting it and pulling it straight back. Figure 5-80 Remove the ECU (1 of 7) 1 3. Disconnect three connectors (callout 2). Figure 5-81 Remove the ECU (2 of 7) 2 154 Chapter 5 Removal and replacement ENWW

Section	Page
Product information	19
Quick access to product information	20
Product comparison	21
Product features	22
Product walkaround	23
Front view	23
Back view	24
Interface ports	24
Control panel	25
Serial number and model number location	26
Software description	27
Supported operating systems	27
Supported printer drivers	27
Software included with the product	27
Recommended installation for Windows	28
Express installation (USB or network)	28
Macintosh software	28
Software for Windows	30
HP ToolboxFX	30
Embedded Web server (EWS)	30
Software for Macintosh	31
HP Director	31
Macintosh Configure Device (Mac OS X v10.3, v10.4, and later)	31
PDEs (Mac OS X v10.3, v10.4, and later)	32
Uninstall software	33
Windows	33
Macintosh	33
Media specifications	34
Supported paper and print media sizes	34
Media to avoid	35
Media that can damage the product	35
Installation	37
Operating environment	38
Minimum system requirements	39
Unpack the product	40
Install input devices	41
ADF input tray	41
250-sheet input tray (tray 3)	42
Install the control-panel faceplate	43
Load paper and print media	44
Load documents to fax, copy, or scan	44
Tray 1	45
Tray 2 or 3	46
Configure trays	47
Change tray selection	47
Install memory DIMMs	48
Information	48
Install a memory DIMM	48
Maintenance	51
Manage supplies	52
Life expectancies of supplies and the product	52
Order supplies	52
Store print cartridges	53
Replace and recycle supplies	53
Replace print cartridge	55
Load staples	57
Replace the tray 2 pickup roller	58
Replace the tray 2 and optional tray 3 separation pad	63
HP policy on non-HP supplies	66
Reset the product for non-HP supplies	66
HP fraud hotline	66
Clean the product	67
Clean the exterior	67
Clean the flatbed scanner glass	67
Clean the scanner-cover backing	69
Clean the tray 2 pickup roller	70
Clean the ADF pickup-roller assembly	73
Clean the paper path	74
Clean the paper path from HP ToolboxFX	75
Clean the paper path from the product control panel	75
Manage the product	76
HP ToolboxFX	76
View the HP ToolboxFX	76
Status	76
Event log	77
Alerts	77
Set up status alerts	77
Set up e-mail alerts	77
Fax	77
Fax tasks	78
Fax phone book	78
Fax send log	80
Fax receive log	80
Help (Documentation)	80
System settings	81
Device information	81
Paper handling	82
Print quality	82
Paper types	82
System setup	83
Service	83
Device Polling	83
Print settings	83
Printing	83
PCL 5e	84
PostScript	84
Network settings	84
Embedded Web server	84
Features	84
Secure the embedded Web server	85
Macintosh Configure Device (Mac OS X v10.3, v10.4, and later)	85
Theory of operation	87
Basic operation	88
Sequence of operation for the base unit	88
Scanner and ADF functions and operation	90
Scanner functions	90
Scanner operation	91
ADF operation	91
ADF paper path and ADF sensors	92
ADF jam detection	93
Internal components (base unit)	94
Engine control system	96
Laser/scanner system	98
Pickup/feed/delivery system	99
Image-formation system	101
Fax functions and operation	105
Computer and network security features	105
PSTN operation	105
Receive faxes when you hear fax tones	105
Distinctive ring function	106
Fax by using Voice over IP services	106
The fax subsystem	107
Fax card in the fax subsystem	107
Safety isolation	107
Safety-protection circuitry	107
Data path	108
Hook state	108
Downstream device detection	108
Hook switch control	108
Ring detect	109
Line current control	109
Billing- (metering-) tone filters	109
Fax page storage in flash memory	109
Stored fax pages	109
Advantages of flash memory storage	109
Removal and replacement	111
Introduction	112
Removal and replacement strategy	112
Electrostatic discharge	112
User-replaceable parts	112
Required tools	113
Before performing service	113
After performing service	114
Post-service tests	114
Test 1 (print-quality test)	114
Test 2 (copy-quality test)	114
Test 3 (fax-quality test)	115
Parts removal order	116
Remove the print cartridge	117
External panels, covers, and doors	118
Right cover	118
Left cover	120
Print-cartridge door	122
Rear cover	124
Top cover	126
Replace the ADF pickup-roller assembly	128
ADF scanner glass	131
ADF assembly	133
Scanner/ADF assembly	135
Bezel and control panel	137
Internal assemblies	140
Convenience-stapler assembly (HP LaserJet M2727nfs only)	140
Convenience-stapler power supply (HP LaserJet M2727nfs only)	142
Convenience-stapler AC inlet cable (HP LaserJet M2727nfs only)	144
Convenience-stapler power supply bracket and strap (HP LaserJet M2727nfs only)	145
Speaker	146
Power-switch PCA	148
Formatter	150
Duplex assembly	153
Laser/scanner (print engine)	155
Memory-tag-reader assembly (E-label reader)	157
Fan	159
Duplex-drive gears	161
Duplex solenoid	163
Fuser	165
Interlock assembly	170
Engine controller assembly (ECU)	171
Main motor	176
Pickup-and-feed assemblies	178
Transfer roller	178
Registration-roller assembly	179
Main gear assembly and tray 2 pickup solenoid	180
Solve problems	183
Problem-solving checklist	184
Control-panel messages	187
Alert and warning messages	187
Alert and warning message tables	187
Critical error messages	195
Critical error message-tables	195
Clear jams	197
Causes of jams	197
Where to look for jams	198
Clear jams from the ADF	198
Clear jams from the input-tray areas	200
Clear jams from the duplexer	202
Clear jams from the output-bin areas	204
Top (face-down) output bin	204
Rear (face-up) output bin	205
Clear jams from the print-cartridge area	206
Clear jams from the convenience stapler (HP LaserJet M2727nfs MFP only)	207
Avoid repeated jams	208
Control-panel menus	209
Use the control-panel main menus	209
Control-panel main menus	209
Control-panel secondary menus	217
Use the control-panel secondary menus	217
Control-panel secondary menus	217
Print problems	222
Print-quality problems	222
Improve print quality	222
Print-quality settings	222
To temporarily change print-quality settings	222
To change print-quality settings for all future jobs	222
Identify and correct print defects	223
Print-quality checklist	223
General print-quality issues	223
Scan problems	229
Solve scanned-image problems	229
Scan-quality problems	231
Prevent problems	231
Solve scan-quality problems	231
Copy problems	232
Prevent problems	232
Image problems	232
Media-handling problems	233
Performance problems	235
Fax problems	236
General fax problem-solve	236
Problems receiving faxes	237
Problems sending faxes	240
Voice-call problems	242
Media-handling problems	243
Performance problems	244
Control-panel display problems	245
Convenience-stapler problems (HP LaserJet M2727nfs only)	245
DSL problems	246
PABX line problems	246
ADF problems	247
Functional checks	248
Drum rotation test	248
Engine test	249
Half self-test functional check	250
Perform a half self-test check	250
Perform other checks	250
Heating element check	251
High-voltage contacts check	251
Check the print-cartridge contacts	251
Check the high-voltage connector assembly	252
Service-mode functions	253
NVRAM initialization	253
Super NVRAM initialization	253
Service menu	253
Problem-solve tools	255
Product information pages and reports	255
Configuration page	255
Supplies Status page	255
PCL, PCL 6, or PS font list	255
Demo page	256
Usage page	256
Menu map	256
Network report	256
Fax reports	257
Fax activity log	257
Fax call report	257
Phone book report	257
Billing-code report	258
HP ToolboxFX	258
To view HP ToolboxFX	258
Troubleshooting tab	258
Service menu	259
Restore the factory-set defaults	259
Clean the paper path	259
T.30 protocol trace	260
Archive print	260
Firmware updates	261
Firmware update by using a flash executable file	261
Parts	263
Accessories and ordering information	265
Supplies	266
Memory	266
Cable and interface accessories	266
Paper-handling accessories	267
Whole unit replacement	268
Scanner/ADF replacement parts	272
Control-panel bezels	273
Supplementary documentation and support	275
Problem-solve diagrams	277
Repetitive image defects	277
Interface connectors	278
Formatter connectors	278
Fax card	279
Solenoids	280
Switches and sensors	281
Rollers and pads	282
PCAs (base unit)	283
Major components (base unit)	284
Scanner and ADF	285
Circuit diagram (1 of 2)	286
Circuit diagram (2 of 2)	287
Parts lists and diagrams	288
Types of screws	289
Scanner and ADF assemblies	290
Scanner components	292
ADF components	294
Convenience stapler components (HP LaserJet M2727nfs only)	296
Formatter, fax card, HP jewel, and nameplate	298
External covers and panels	300
Cartridge door assembly	302
Internal components (1 of 4)	304
Internal components (2 of 4)	306
Internal components (3 of 4)	308
Internal components (4 of 4)	310
Engine-controller assembly (ECU)	312
Main-drive assembly	314
Duplexing-drive assembly	316
Tray 2 cassette and tray 3 cassette/feeder	318
Duplexing assembly	320
Fuser assembly	322
Alphabetical parts list	324
Numerical parts list	330
Service and support	337
Hewlett-Packard limited warranty statement	337
Print cartridge limited warranty statement	339
Specifications	341
Physical specifications	342
Electrical specifications	342
Power consumption	342
Environmental specifications	343
Acoustic emissions	343
Regulatory information	345
FCC compliance	346
Environmental product stewardship program	347
Protecting the environment	347
Ozone production	347
Power consumption	347
Toner consumption	347
Paper use	347
Plastics	347
HP LaserJet print supplies	347
Return and recycling instructions	348
United States and Puerto Rico	348
Multiple returns (two to eight cartridges)	348
Single returns	348
Shipping	348
Non-US returns	348
Paper	348
Material restrictions	348
Disposal of waste equipment by users in private households in the European Union	349
Material Safety Data Sheet (MSDS)	349
For more information	350
Telephone Consumer Protection Act (United States)	351
IC CS-03 requirements	351
EU statement for telecom operation	352
New Zealand telecom statements	352
Declaration of conformity	353
Safety statements	354
Laser safety	354
Canadian DOC regulations	354
EMI statement (Korea)	354
Laser statement for Finland	355
Substances table (China)	356